linux/drivers/scsi/megaraid/megaraid_sas_base.c

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/*
* Linux MegaRAID driver for SAS based RAID controllers
*
* Copyright (c) 2003-2012 LSI Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* FILE: megaraid_sas_base.c
* Version : v06.504.01.00-rc1
*
* Authors: LSI Corporation
* Sreenivas Bagalkote
* Sumant Patro
* Bo Yang
* Adam Radford <linuxraid@lsi.com>
*
* Send feedback to: <megaraidlinux@lsi.com>
*
* Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
* ATTN: Linuxraid
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/uio.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/compat.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/poll.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "megaraid_sas_fusion.h"
#include "megaraid_sas.h"
/*
* Number of sectors per IO command
* Will be set in megasas_init_mfi if user does not provide
*/
static unsigned int max_sectors;
module_param_named(max_sectors, max_sectors, int, 0);
MODULE_PARM_DESC(max_sectors,
"Maximum number of sectors per IO command");
static int msix_disable;
module_param(msix_disable, int, S_IRUGO);
MODULE_PARM_DESC(msix_disable, "Disable MSI-X interrupt handling. Default: 0");
static unsigned int msix_vectors;
module_param(msix_vectors, int, S_IRUGO);
MODULE_PARM_DESC(msix_vectors, "MSI-X max vector count. Default: Set by FW");
static int throttlequeuedepth = MEGASAS_THROTTLE_QUEUE_DEPTH;
module_param(throttlequeuedepth, int, S_IRUGO);
MODULE_PARM_DESC(throttlequeuedepth,
"Adapter queue depth when throttled due to I/O timeout. Default: 16");
int resetwaittime = MEGASAS_RESET_WAIT_TIME;
module_param(resetwaittime, int, S_IRUGO);
MODULE_PARM_DESC(resetwaittime, "Wait time in seconds after I/O timeout "
"before resetting adapter. Default: 180");
MODULE_LICENSE("GPL");
MODULE_VERSION(MEGASAS_VERSION);
MODULE_AUTHOR("megaraidlinux@lsi.com");
MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
static int megasas_get_pd_list(struct megasas_instance *instance);
static int megasas_issue_init_mfi(struct megasas_instance *instance);
static int megasas_register_aen(struct megasas_instance *instance,
u32 seq_num, u32 class_locale_word);
/*
* PCI ID table for all supported controllers
*/
static struct pci_device_id megasas_pci_table[] = {
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1064R)},
/* xscale IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
/* ppc IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
/* ppc IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078GEN2)},
/* gen2*/
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0079GEN2)},
/* gen2*/
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0073SKINNY)},
/* skinny*/
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS0071SKINNY)},
/* skinny*/
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
/* xscale IOP, vega */
{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
/* xscale IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
/* Fusion */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_INVADER)},
/* Invader */
{}
};
MODULE_DEVICE_TABLE(pci, megasas_pci_table);
static int megasas_mgmt_majorno;
static struct megasas_mgmt_info megasas_mgmt_info;
static struct fasync_struct *megasas_async_queue;
static DEFINE_MUTEX(megasas_async_queue_mutex);
static int megasas_poll_wait_aen;
static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
static u32 support_poll_for_event;
u32 megasas_dbg_lvl;
static u32 support_device_change;
/* define lock for aen poll */
spinlock_t poll_aen_lock;
void
megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
u8 alt_status);
static u32
megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs);
static int
megasas_adp_reset_gen2(struct megasas_instance *instance,
struct megasas_register_set __iomem *reg_set);
static irqreturn_t megasas_isr(int irq, void *devp);
static u32
megasas_init_adapter_mfi(struct megasas_instance *instance);
u32
megasas_build_and_issue_cmd(struct megasas_instance *instance,
struct scsi_cmnd *scmd);
static void megasas_complete_cmd_dpc(unsigned long instance_addr);
void
megasas_release_fusion(struct megasas_instance *instance);
int
megasas_ioc_init_fusion(struct megasas_instance *instance);
void
megasas_free_cmds_fusion(struct megasas_instance *instance);
u8
megasas_get_map_info(struct megasas_instance *instance);
int
megasas_sync_map_info(struct megasas_instance *instance);
int
wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
void megasas_reset_reply_desc(struct megasas_instance *instance);
u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
struct LD_LOAD_BALANCE_INFO *lbInfo);
int megasas_reset_fusion(struct Scsi_Host *shost);
void megasas_fusion_ocr_wq(struct work_struct *work);
void
megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
instance->instancet->fire_cmd(instance,
cmd->frame_phys_addr, 0, instance->reg_set);
}
/**
* megasas_get_cmd - Get a command from the free pool
* @instance: Adapter soft state
*
* Returns a free command from the pool
*/
struct megasas_cmd *megasas_get_cmd(struct megasas_instance
*instance)
{
unsigned long flags;
struct megasas_cmd *cmd = NULL;
spin_lock_irqsave(&instance->cmd_pool_lock, flags);
if (!list_empty(&instance->cmd_pool)) {
cmd = list_entry((&instance->cmd_pool)->next,
struct megasas_cmd, list);
list_del_init(&cmd->list);
} else {
printk(KERN_ERR "megasas: Command pool empty!\n");
}
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
return cmd;
}
/**
* megasas_return_cmd - Return a cmd to free command pool
* @instance: Adapter soft state
* @cmd: Command packet to be returned to free command pool
*/
inline void
megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
unsigned long flags;
spin_lock_irqsave(&instance->cmd_pool_lock, flags);
cmd->scmd = NULL;
cmd->frame_count = 0;
if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
(reset_devices))
cmd->frame->hdr.cmd = MFI_CMD_INVALID;
list_add_tail(&cmd->list, &instance->cmd_pool);
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
}
/**
* The following functions are defined for xscale
* (deviceid : 1064R, PERC5) controllers
*/
/**
* megasas_enable_intr_xscale - Enables interrupts
* @regs: MFI register set
*/
static inline void
megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
{
writel(0, &(regs)->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_disable_intr_xscale -Disables interrupt
* @regs: MFI register set
*/
static inline void
megasas_disable_intr_xscale(struct megasas_register_set __iomem * regs)
{
u32 mask = 0x1f;
writel(mask, &regs->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_read_fw_status_reg_xscale - returns the current FW status value
* @regs: MFI register set
*/
static u32
megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
{
return readl(&(regs)->outbound_msg_0);
}
/**
* megasas_clear_interrupt_xscale - Check & clear interrupt
* @regs: MFI register set
*/
static int
megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
{
u32 status;
u32 mfiStatus = 0;
/*
* Check if it is our interrupt
*/
status = readl(&regs->outbound_intr_status);
if (status & MFI_OB_INTR_STATUS_MASK)
mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
if (status & MFI_XSCALE_OMR0_CHANGE_INTERRUPT)
mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
/*
* Clear the interrupt by writing back the same value
*/
if (mfiStatus)
writel(status, &regs->outbound_intr_status);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_status);
return mfiStatus;
}
/**
* megasas_fire_cmd_xscale - Sends command to the FW
* @frame_phys_addr : Physical address of cmd
* @frame_count : Number of frames for the command
* @regs : MFI register set
*/
static inline void
megasas_fire_cmd_xscale(struct megasas_instance *instance,
dma_addr_t frame_phys_addr,
u32 frame_count,
struct megasas_register_set __iomem *regs)
{
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel((frame_phys_addr >> 3)|(frame_count),
&(regs)->inbound_queue_port);
spin_unlock_irqrestore(&instance->hba_lock, flags);
}
/**
* megasas_adp_reset_xscale - For controller reset
* @regs: MFI register set
*/
static int
megasas_adp_reset_xscale(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
u32 i;
u32 pcidata;
writel(MFI_ADP_RESET, &regs->inbound_doorbell);
for (i = 0; i < 3; i++)
msleep(1000); /* sleep for 3 secs */
pcidata = 0;
pci_read_config_dword(instance->pdev, MFI_1068_PCSR_OFFSET, &pcidata);
printk(KERN_NOTICE "pcidata = %x\n", pcidata);
if (pcidata & 0x2) {
printk(KERN_NOTICE "mfi 1068 offset read=%x\n", pcidata);
pcidata &= ~0x2;
pci_write_config_dword(instance->pdev,
MFI_1068_PCSR_OFFSET, pcidata);
for (i = 0; i < 2; i++)
msleep(1000); /* need to wait 2 secs again */
pcidata = 0;
pci_read_config_dword(instance->pdev,
MFI_1068_FW_HANDSHAKE_OFFSET, &pcidata);
printk(KERN_NOTICE "1068 offset handshake read=%x\n", pcidata);
if ((pcidata & 0xffff0000) == MFI_1068_FW_READY) {
printk(KERN_NOTICE "1068 offset pcidt=%x\n", pcidata);
pcidata = 0;
pci_write_config_dword(instance->pdev,
MFI_1068_FW_HANDSHAKE_OFFSET, pcidata);
}
}
return 0;
}
/**
* megasas_check_reset_xscale - For controller reset check
* @regs: MFI register set
*/
static int
megasas_check_reset_xscale(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
u32 consumer;
consumer = *instance->consumer;
if ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
(*instance->consumer == MEGASAS_ADPRESET_INPROG_SIGN)) {
return 1;
}
return 0;
}
static struct megasas_instance_template megasas_instance_template_xscale = {
.fire_cmd = megasas_fire_cmd_xscale,
.enable_intr = megasas_enable_intr_xscale,
.disable_intr = megasas_disable_intr_xscale,
.clear_intr = megasas_clear_intr_xscale,
.read_fw_status_reg = megasas_read_fw_status_reg_xscale,
.adp_reset = megasas_adp_reset_xscale,
.check_reset = megasas_check_reset_xscale,
.service_isr = megasas_isr,
.tasklet = megasas_complete_cmd_dpc,
.init_adapter = megasas_init_adapter_mfi,
.build_and_issue_cmd = megasas_build_and_issue_cmd,
.issue_dcmd = megasas_issue_dcmd,
};
/**
* This is the end of set of functions & definitions specific
* to xscale (deviceid : 1064R, PERC5) controllers
*/
/**
* The following functions are defined for ppc (deviceid : 0x60)
* controllers
*/
/**
* megasas_enable_intr_ppc - Enables interrupts
* @regs: MFI register set
*/
static inline void
megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
{
writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
writel(~0x80000000, &(regs)->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_disable_intr_ppc - Disable interrupt
* @regs: MFI register set
*/
static inline void
megasas_disable_intr_ppc(struct megasas_register_set __iomem * regs)
{
u32 mask = 0xFFFFFFFF;
writel(mask, &regs->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_read_fw_status_reg_ppc - returns the current FW status value
* @regs: MFI register set
*/
static u32
megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
{
return readl(&(regs)->outbound_scratch_pad);
}
/**
* megasas_clear_interrupt_ppc - Check & clear interrupt
* @regs: MFI register set
*/
static int
megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
{
u32 status, mfiStatus = 0;
/*
* Check if it is our interrupt
*/
status = readl(&regs->outbound_intr_status);
if (status & MFI_REPLY_1078_MESSAGE_INTERRUPT)
mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT)
mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
/*
* Clear the interrupt by writing back the same value
*/
writel(status, &regs->outbound_doorbell_clear);
/* Dummy readl to force pci flush */
readl(&regs->outbound_doorbell_clear);
return mfiStatus;
}
/**
* megasas_fire_cmd_ppc - Sends command to the FW
* @frame_phys_addr : Physical address of cmd
* @frame_count : Number of frames for the command
* @regs : MFI register set
*/
static inline void
megasas_fire_cmd_ppc(struct megasas_instance *instance,
dma_addr_t frame_phys_addr,
u32 frame_count,
struct megasas_register_set __iomem *regs)
{
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel((frame_phys_addr | (frame_count<<1))|1,
&(regs)->inbound_queue_port);
spin_unlock_irqrestore(&instance->hba_lock, flags);
}
/**
* megasas_check_reset_ppc - For controller reset check
* @regs: MFI register set
*/
static int
megasas_check_reset_ppc(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
return 1;
return 0;
}
static struct megasas_instance_template megasas_instance_template_ppc = {
.fire_cmd = megasas_fire_cmd_ppc,
.enable_intr = megasas_enable_intr_ppc,
.disable_intr = megasas_disable_intr_ppc,
.clear_intr = megasas_clear_intr_ppc,
.read_fw_status_reg = megasas_read_fw_status_reg_ppc,
.adp_reset = megasas_adp_reset_xscale,
.check_reset = megasas_check_reset_ppc,
.service_isr = megasas_isr,
.tasklet = megasas_complete_cmd_dpc,
.init_adapter = megasas_init_adapter_mfi,
.build_and_issue_cmd = megasas_build_and_issue_cmd,
.issue_dcmd = megasas_issue_dcmd,
};
/**
* megasas_enable_intr_skinny - Enables interrupts
* @regs: MFI register set
*/
static inline void
megasas_enable_intr_skinny(struct megasas_register_set __iomem *regs)
{
writel(0xFFFFFFFF, &(regs)->outbound_intr_mask);
writel(~MFI_SKINNY_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_disable_intr_skinny - Disables interrupt
* @regs: MFI register set
*/
static inline void
megasas_disable_intr_skinny(struct megasas_register_set __iomem *regs)
{
u32 mask = 0xFFFFFFFF;
writel(mask, &regs->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_read_fw_status_reg_skinny - returns the current FW status value
* @regs: MFI register set
*/
static u32
megasas_read_fw_status_reg_skinny(struct megasas_register_set __iomem *regs)
{
return readl(&(regs)->outbound_scratch_pad);
}
/**
* megasas_clear_interrupt_skinny - Check & clear interrupt
* @regs: MFI register set
*/
static int
megasas_clear_intr_skinny(struct megasas_register_set __iomem *regs)
{
u32 status;
u32 mfiStatus = 0;
/*
* Check if it is our interrupt
*/
status = readl(&regs->outbound_intr_status);
if (!(status & MFI_SKINNY_ENABLE_INTERRUPT_MASK)) {
return 0;
}
/*
* Check if it is our interrupt
*/
if ((megasas_read_fw_status_reg_gen2(regs) & MFI_STATE_MASK) ==
MFI_STATE_FAULT) {
mfiStatus = MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
} else
mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
/*
* Clear the interrupt by writing back the same value
*/
writel(status, &regs->outbound_intr_status);
/*
* dummy read to flush PCI
*/
readl(&regs->outbound_intr_status);
return mfiStatus;
}
/**
* megasas_fire_cmd_skinny - Sends command to the FW
* @frame_phys_addr : Physical address of cmd
* @frame_count : Number of frames for the command
* @regs : MFI register set
*/
static inline void
megasas_fire_cmd_skinny(struct megasas_instance *instance,
dma_addr_t frame_phys_addr,
u32 frame_count,
struct megasas_register_set __iomem *regs)
{
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel(0, &(regs)->inbound_high_queue_port);
writel((frame_phys_addr | (frame_count<<1))|1,
&(regs)->inbound_low_queue_port);
spin_unlock_irqrestore(&instance->hba_lock, flags);
}
/**
* megasas_check_reset_skinny - For controller reset check
* @regs: MFI register set
*/
static int
megasas_check_reset_skinny(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL)
return 1;
return 0;
}
static struct megasas_instance_template megasas_instance_template_skinny = {
.fire_cmd = megasas_fire_cmd_skinny,
.enable_intr = megasas_enable_intr_skinny,
.disable_intr = megasas_disable_intr_skinny,
.clear_intr = megasas_clear_intr_skinny,
.read_fw_status_reg = megasas_read_fw_status_reg_skinny,
.adp_reset = megasas_adp_reset_gen2,
.check_reset = megasas_check_reset_skinny,
.service_isr = megasas_isr,
.tasklet = megasas_complete_cmd_dpc,
.init_adapter = megasas_init_adapter_mfi,
.build_and_issue_cmd = megasas_build_and_issue_cmd,
.issue_dcmd = megasas_issue_dcmd,
};
/**
* The following functions are defined for gen2 (deviceid : 0x78 0x79)
* controllers
*/
/**
* megasas_enable_intr_gen2 - Enables interrupts
* @regs: MFI register set
*/
static inline void
megasas_enable_intr_gen2(struct megasas_register_set __iomem *regs)
{
writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
/* write ~0x00000005 (4 & 1) to the intr mask*/
writel(~MFI_GEN2_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_disable_intr_gen2 - Disables interrupt
* @regs: MFI register set
*/
static inline void
megasas_disable_intr_gen2(struct megasas_register_set __iomem *regs)
{
u32 mask = 0xFFFFFFFF;
writel(mask, &regs->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
}
/**
* megasas_read_fw_status_reg_gen2 - returns the current FW status value
* @regs: MFI register set
*/
static u32
megasas_read_fw_status_reg_gen2(struct megasas_register_set __iomem *regs)
{
return readl(&(regs)->outbound_scratch_pad);
}
/**
* megasas_clear_interrupt_gen2 - Check & clear interrupt
* @regs: MFI register set
*/
static int
megasas_clear_intr_gen2(struct megasas_register_set __iomem *regs)
{
u32 status;
u32 mfiStatus = 0;
/*
* Check if it is our interrupt
*/
status = readl(&regs->outbound_intr_status);
if (status & MFI_GEN2_ENABLE_INTERRUPT_MASK) {
mfiStatus = MFI_INTR_FLAG_REPLY_MESSAGE;
}
if (status & MFI_G2_OUTBOUND_DOORBELL_CHANGE_INTERRUPT) {
mfiStatus |= MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE;
}
/*
* Clear the interrupt by writing back the same value
*/
if (mfiStatus)
writel(status, &regs->outbound_doorbell_clear);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_status);
return mfiStatus;
}
/**
* megasas_fire_cmd_gen2 - Sends command to the FW
* @frame_phys_addr : Physical address of cmd
* @frame_count : Number of frames for the command
* @regs : MFI register set
*/
static inline void
megasas_fire_cmd_gen2(struct megasas_instance *instance,
dma_addr_t frame_phys_addr,
u32 frame_count,
struct megasas_register_set __iomem *regs)
{
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel((frame_phys_addr | (frame_count<<1))|1,
&(regs)->inbound_queue_port);
spin_unlock_irqrestore(&instance->hba_lock, flags);
}
/**
* megasas_adp_reset_gen2 - For controller reset
* @regs: MFI register set
*/
static int
megasas_adp_reset_gen2(struct megasas_instance *instance,
struct megasas_register_set __iomem *reg_set)
{
u32 retry = 0 ;
u32 HostDiag;
u32 *seq_offset = &reg_set->seq_offset;
u32 *hostdiag_offset = &reg_set->host_diag;
if (instance->instancet == &megasas_instance_template_skinny) {
seq_offset = &reg_set->fusion_seq_offset;
hostdiag_offset = &reg_set->fusion_host_diag;
}
writel(0, seq_offset);
writel(4, seq_offset);
writel(0xb, seq_offset);
writel(2, seq_offset);
writel(7, seq_offset);
writel(0xd, seq_offset);
msleep(1000);
HostDiag = (u32)readl(hostdiag_offset);
while ( !( HostDiag & DIAG_WRITE_ENABLE) ) {
msleep(100);
HostDiag = (u32)readl(hostdiag_offset);
printk(KERN_NOTICE "RESETGEN2: retry=%x, hostdiag=%x\n",
retry, HostDiag);
if (retry++ >= 100)
return 1;
}
printk(KERN_NOTICE "ADP_RESET_GEN2: HostDiag=%x\n", HostDiag);
writel((HostDiag | DIAG_RESET_ADAPTER), hostdiag_offset);
ssleep(10);
HostDiag = (u32)readl(hostdiag_offset);
while ( ( HostDiag & DIAG_RESET_ADAPTER) ) {
msleep(100);
HostDiag = (u32)readl(hostdiag_offset);
printk(KERN_NOTICE "RESET_GEN2: retry=%x, hostdiag=%x\n",
retry, HostDiag);
if (retry++ >= 1000)
return 1;
}
return 0;
}
/**
* megasas_check_reset_gen2 - For controller reset check
* @regs: MFI register set
*/
static int
megasas_check_reset_gen2(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
return 1;
}
return 0;
}
static struct megasas_instance_template megasas_instance_template_gen2 = {
.fire_cmd = megasas_fire_cmd_gen2,
.enable_intr = megasas_enable_intr_gen2,
.disable_intr = megasas_disable_intr_gen2,
.clear_intr = megasas_clear_intr_gen2,
.read_fw_status_reg = megasas_read_fw_status_reg_gen2,
.adp_reset = megasas_adp_reset_gen2,
.check_reset = megasas_check_reset_gen2,
.service_isr = megasas_isr,
.tasklet = megasas_complete_cmd_dpc,
.init_adapter = megasas_init_adapter_mfi,
.build_and_issue_cmd = megasas_build_and_issue_cmd,
.issue_dcmd = megasas_issue_dcmd,
};
/**
* This is the end of set of functions & definitions
* specific to gen2 (deviceid : 0x78, 0x79) controllers
*/
/*
* Template added for TB (Fusion)
*/
extern struct megasas_instance_template megasas_instance_template_fusion;
/**
* megasas_issue_polled - Issues a polling command
* @instance: Adapter soft state
* @cmd: Command packet to be issued
*
* For polling, MFI requires the cmd_status to be set to 0xFF before posting.
*/
int
megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
struct megasas_header *frame_hdr = &cmd->frame->hdr;
frame_hdr->cmd_status = 0xFF;
frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
/*
* Issue the frame using inbound queue port
*/
instance->instancet->issue_dcmd(instance, cmd);
/*
* Wait for cmd_status to change
*/
return wait_and_poll(instance, cmd);
}
/**
* megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
* @instance: Adapter soft state
* @cmd: Command to be issued
*
* This function waits on an event for the command to be returned from ISR.
* Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
* Used to issue ioctl commands.
*/
static int
megasas_issue_blocked_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd)
{
cmd->cmd_status = ENODATA;
instance->instancet->issue_dcmd(instance, cmd);
wait_event(instance->int_cmd_wait_q, cmd->cmd_status != ENODATA);
return 0;
}
/**
* megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
* @instance: Adapter soft state
* @cmd_to_abort: Previously issued cmd to be aborted
*
* MFI firmware can abort previously issued AEN command (automatic event
* notification). The megasas_issue_blocked_abort_cmd() issues such abort
* cmd and waits for return status.
* Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
*/
static int
megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd_to_abort)
{
struct megasas_cmd *cmd;
struct megasas_abort_frame *abort_fr;
cmd = megasas_get_cmd(instance);
if (!cmd)
return -1;
abort_fr = &cmd->frame->abort;
/*
* Prepare and issue the abort frame
*/
abort_fr->cmd = MFI_CMD_ABORT;
abort_fr->cmd_status = 0xFF;
abort_fr->flags = 0;
abort_fr->abort_context = cmd_to_abort->index;
abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
abort_fr->abort_mfi_phys_addr_hi = 0;
cmd->sync_cmd = 1;
cmd->cmd_status = 0xFF;
instance->instancet->issue_dcmd(instance, cmd);
/*
* Wait for this cmd to complete
*/
wait_event(instance->abort_cmd_wait_q, cmd->cmd_status != 0xFF);
cmd->sync_cmd = 0;
megasas_return_cmd(instance, cmd);
return 0;
}
/**
* megasas_make_sgl32 - Prepares 32-bit SGL
* @instance: Adapter soft state
* @scp: SCSI command from the mid-layer
* @mfi_sgl: SGL to be filled in
*
* If successful, this function returns the number of SG elements. Otherwise,
* it returnes -1.
*/
static int
megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
union megasas_sgl *mfi_sgl)
{
int i;
int sge_count;
struct scatterlist *os_sgl;
sge_count = scsi_dma_map(scp);
BUG_ON(sge_count < 0);
if (sge_count) {
scsi_for_each_sg(scp, os_sgl, sge_count, i) {
mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
}
}
return sge_count;
}
/**
* megasas_make_sgl64 - Prepares 64-bit SGL
* @instance: Adapter soft state
* @scp: SCSI command from the mid-layer
* @mfi_sgl: SGL to be filled in
*
* If successful, this function returns the number of SG elements. Otherwise,
* it returnes -1.
*/
static int
megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
union megasas_sgl *mfi_sgl)
{
int i;
int sge_count;
struct scatterlist *os_sgl;
sge_count = scsi_dma_map(scp);
BUG_ON(sge_count < 0);
if (sge_count) {
scsi_for_each_sg(scp, os_sgl, sge_count, i) {
mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
}
}
return sge_count;
}
/**
* megasas_make_sgl_skinny - Prepares IEEE SGL
* @instance: Adapter soft state
* @scp: SCSI command from the mid-layer
* @mfi_sgl: SGL to be filled in
*
* If successful, this function returns the number of SG elements. Otherwise,
* it returnes -1.
*/
static int
megasas_make_sgl_skinny(struct megasas_instance *instance,
struct scsi_cmnd *scp, union megasas_sgl *mfi_sgl)
{
int i;
int sge_count;
struct scatterlist *os_sgl;
sge_count = scsi_dma_map(scp);
if (sge_count) {
scsi_for_each_sg(scp, os_sgl, sge_count, i) {
mfi_sgl->sge_skinny[i].length = sg_dma_len(os_sgl);
mfi_sgl->sge_skinny[i].phys_addr =
sg_dma_address(os_sgl);
mfi_sgl->sge_skinny[i].flag = 0;
}
}
return sge_count;
}
/**
* megasas_get_frame_count - Computes the number of frames
* @frame_type : type of frame- io or pthru frame
* @sge_count : number of sg elements
*
* Returns the number of frames required for numnber of sge's (sge_count)
*/
static u32 megasas_get_frame_count(struct megasas_instance *instance,
u8 sge_count, u8 frame_type)
{
int num_cnt;
int sge_bytes;
u32 sge_sz;
u32 frame_count=0;
sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
sizeof(struct megasas_sge32);
if (instance->flag_ieee) {
sge_sz = sizeof(struct megasas_sge_skinny);
}
/*
* Main frame can contain 2 SGEs for 64-bit SGLs and
* 3 SGEs for 32-bit SGLs for ldio &
* 1 SGEs for 64-bit SGLs and
* 2 SGEs for 32-bit SGLs for pthru frame
*/
if (unlikely(frame_type == PTHRU_FRAME)) {
if (instance->flag_ieee == 1) {
num_cnt = sge_count - 1;
} else if (IS_DMA64)
num_cnt = sge_count - 1;
else
num_cnt = sge_count - 2;
} else {
if (instance->flag_ieee == 1) {
num_cnt = sge_count - 1;
} else if (IS_DMA64)
num_cnt = sge_count - 2;
else
num_cnt = sge_count - 3;
}
if(num_cnt>0){
sge_bytes = sge_sz * num_cnt;
frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) ;
}
/* Main frame */
frame_count +=1;
if (frame_count > 7)
frame_count = 8;
return frame_count;
}
/**
* megasas_build_dcdb - Prepares a direct cdb (DCDB) command
* @instance: Adapter soft state
* @scp: SCSI command
* @cmd: Command to be prepared in
*
* This function prepares CDB commands. These are typcially pass-through
* commands to the devices.
*/
static int
megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
struct megasas_cmd *cmd)
{
u32 is_logical;
u32 device_id;
u16 flags = 0;
struct megasas_pthru_frame *pthru;
is_logical = MEGASAS_IS_LOGICAL(scp);
device_id = MEGASAS_DEV_INDEX(instance, scp);
pthru = (struct megasas_pthru_frame *)cmd->frame;
if (scp->sc_data_direction == PCI_DMA_TODEVICE)
flags = MFI_FRAME_DIR_WRITE;
else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
flags = MFI_FRAME_DIR_READ;
else if (scp->sc_data_direction == PCI_DMA_NONE)
flags = MFI_FRAME_DIR_NONE;
if (instance->flag_ieee == 1) {
flags |= MFI_FRAME_IEEE;
}
/*
* Prepare the DCDB frame
*/
pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
pthru->cmd_status = 0x0;
pthru->scsi_status = 0x0;
pthru->target_id = device_id;
pthru->lun = scp->device->lun;
pthru->cdb_len = scp->cmd_len;
pthru->timeout = 0;
pthru->pad_0 = 0;
pthru->flags = flags;
pthru->data_xfer_len = scsi_bufflen(scp);
memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
/*
* If the command is for the tape device, set the
* pthru timeout to the os layer timeout value.
*/
if (scp->device->type == TYPE_TAPE) {
if ((scp->request->timeout / HZ) > 0xFFFF)
pthru->timeout = 0xFFFF;
else
pthru->timeout = scp->request->timeout / HZ;
}
/*
* Construct SGL
*/
if (instance->flag_ieee == 1) {
pthru->flags |= MFI_FRAME_SGL64;
pthru->sge_count = megasas_make_sgl_skinny(instance, scp,
&pthru->sgl);
} else if (IS_DMA64) {
pthru->flags |= MFI_FRAME_SGL64;
pthru->sge_count = megasas_make_sgl64(instance, scp,
&pthru->sgl);
} else
pthru->sge_count = megasas_make_sgl32(instance, scp,
&pthru->sgl);
if (pthru->sge_count > instance->max_num_sge) {
printk(KERN_ERR "megasas: DCDB two many SGE NUM=%x\n",
pthru->sge_count);
return 0;
}
/*
* Sense info specific
*/
pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
pthru->sense_buf_phys_addr_hi = 0;
pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
/*
* Compute the total number of frames this command consumes. FW uses
* this number to pull sufficient number of frames from host memory.
*/
cmd->frame_count = megasas_get_frame_count(instance, pthru->sge_count,
PTHRU_FRAME);
return cmd->frame_count;
}
/**
* megasas_build_ldio - Prepares IOs to logical devices
* @instance: Adapter soft state
* @scp: SCSI command
* @cmd: Command to be prepared
*
* Frames (and accompanying SGLs) for regular SCSI IOs use this function.
*/
static int
megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
struct megasas_cmd *cmd)
{
u32 device_id;
u8 sc = scp->cmnd[0];
u16 flags = 0;
struct megasas_io_frame *ldio;
device_id = MEGASAS_DEV_INDEX(instance, scp);
ldio = (struct megasas_io_frame *)cmd->frame;
if (scp->sc_data_direction == PCI_DMA_TODEVICE)
flags = MFI_FRAME_DIR_WRITE;
else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
flags = MFI_FRAME_DIR_READ;
if (instance->flag_ieee == 1) {
flags |= MFI_FRAME_IEEE;
}
/*
* Prepare the Logical IO frame: 2nd bit is zero for all read cmds
*/
ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
ldio->cmd_status = 0x0;
ldio->scsi_status = 0x0;
ldio->target_id = device_id;
ldio->timeout = 0;
ldio->reserved_0 = 0;
ldio->pad_0 = 0;
ldio->flags = flags;
ldio->start_lba_hi = 0;
ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
/*
* 6-byte READ(0x08) or WRITE(0x0A) cdb
*/
if (scp->cmd_len == 6) {
ldio->lba_count = (u32) scp->cmnd[4];
ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
ldio->start_lba_lo &= 0x1FFFFF;
}
/*
* 10-byte READ(0x28) or WRITE(0x2A) cdb
*/
else if (scp->cmd_len == 10) {
ldio->lba_count = (u32) scp->cmnd[8] |
((u32) scp->cmnd[7] << 8);
ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
/*
* 12-byte READ(0xA8) or WRITE(0xAA) cdb
*/
else if (scp->cmd_len == 12) {
ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
((u32) scp->cmnd[7] << 16) |
((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
/*
* 16-byte READ(0x88) or WRITE(0x8A) cdb
*/
else if (scp->cmd_len == 16) {
ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
((u32) scp->cmnd[11] << 16) |
((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
((u32) scp->cmnd[7] << 16) |
((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
/*
* Construct SGL
*/
if (instance->flag_ieee) {
ldio->flags |= MFI_FRAME_SGL64;
ldio->sge_count = megasas_make_sgl_skinny(instance, scp,
&ldio->sgl);
} else if (IS_DMA64) {
ldio->flags |= MFI_FRAME_SGL64;
ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
} else
ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
if (ldio->sge_count > instance->max_num_sge) {
printk(KERN_ERR "megasas: build_ld_io: sge_count = %x\n",
ldio->sge_count);
return 0;
}
/*
* Sense info specific
*/
ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
ldio->sense_buf_phys_addr_hi = 0;
ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
/*
* Compute the total number of frames this command consumes. FW uses
* this number to pull sufficient number of frames from host memory.
*/
cmd->frame_count = megasas_get_frame_count(instance,
ldio->sge_count, IO_FRAME);
return cmd->frame_count;
}
/**
* megasas_is_ldio - Checks if the cmd is for logical drive
* @scmd: SCSI command
*
* Called by megasas_queue_command to find out if the command to be queued
* is a logical drive command
*/
inline int megasas_is_ldio(struct scsi_cmnd *cmd)
{
if (!MEGASAS_IS_LOGICAL(cmd))
return 0;
switch (cmd->cmnd[0]) {
case READ_10:
case WRITE_10:
case READ_12:
case WRITE_12:
case READ_6:
case WRITE_6:
case READ_16:
case WRITE_16:
return 1;
default:
return 0;
}
}
/**
* megasas_dump_pending_frames - Dumps the frame address of all pending cmds
* in FW
* @instance: Adapter soft state
*/
static inline void
megasas_dump_pending_frames(struct megasas_instance *instance)
{
struct megasas_cmd *cmd;
int i,n;
union megasas_sgl *mfi_sgl;
struct megasas_io_frame *ldio;
struct megasas_pthru_frame *pthru;
u32 sgcount;
u32 max_cmd = instance->max_fw_cmds;
printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
if (IS_DMA64)
printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
else
printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
if(!cmd->scmd)
continue;
printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
if (megasas_is_ldio(cmd->scmd)){
ldio = (struct megasas_io_frame *)cmd->frame;
mfi_sgl = &ldio->sgl;
sgcount = ldio->sge_count;
printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no, cmd->frame_count,ldio->cmd,ldio->target_id, ldio->start_lba_lo,ldio->start_lba_hi,ldio->sense_buf_phys_addr_lo,sgcount);
}
else {
pthru = (struct megasas_pthru_frame *) cmd->frame;
mfi_sgl = &pthru->sgl;
sgcount = pthru->sge_count;
printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no,cmd->frame_count,pthru->cmd,pthru->target_id,pthru->lun,pthru->cdb_len , pthru->data_xfer_len,pthru->sense_buf_phys_addr_lo,sgcount);
}
if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
for (n = 0; n < sgcount; n++){
if (IS_DMA64)
printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl->sge64[n].length , (unsigned long)mfi_sgl->sge64[n].phys_addr) ;
else
printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
}
}
printk(KERN_ERR "\n");
} /*for max_cmd*/
printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
if(cmd->sync_cmd == 1){
printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
}
}
printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
}
u32
megasas_build_and_issue_cmd(struct megasas_instance *instance,
struct scsi_cmnd *scmd)
{
struct megasas_cmd *cmd;
u32 frame_count;
cmd = megasas_get_cmd(instance);
if (!cmd)
return SCSI_MLQUEUE_HOST_BUSY;
/*
* Logical drive command
*/
if (megasas_is_ldio(scmd))
frame_count = megasas_build_ldio(instance, scmd, cmd);
else
frame_count = megasas_build_dcdb(instance, scmd, cmd);
if (!frame_count)
goto out_return_cmd;
cmd->scmd = scmd;
scmd->SCp.ptr = (char *)cmd;
/*
* Issue the command to the FW
*/
atomic_inc(&instance->fw_outstanding);
instance->instancet->fire_cmd(instance, cmd->frame_phys_addr,
cmd->frame_count-1, instance->reg_set);
return 0;
out_return_cmd:
megasas_return_cmd(instance, cmd);
return 1;
}
/**
* megasas_queue_command - Queue entry point
* @scmd: SCSI command to be queued
* @done: Callback entry point
*/
static int
megasas_queue_command_lck(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
{
struct megasas_instance *instance;
unsigned long flags;
instance = (struct megasas_instance *)
scmd->device->host->hostdata;
if (instance->issuepend_done == 0)
return SCSI_MLQUEUE_HOST_BUSY;
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
return SCSI_MLQUEUE_HOST_BUSY;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
scmd->scsi_done = done;
scmd->result = 0;
if (MEGASAS_IS_LOGICAL(scmd) &&
(scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
scmd->result = DID_BAD_TARGET << 16;
goto out_done;
}
switch (scmd->cmnd[0]) {
case SYNCHRONIZE_CACHE:
/*
* FW takes care of flush cache on its own
* No need to send it down
*/
scmd->result = DID_OK << 16;
goto out_done;
default:
break;
}
if (instance->instancet->build_and_issue_cmd(instance, scmd)) {
printk(KERN_ERR "megasas: Err returned from build_and_issue_cmd\n");
return SCSI_MLQUEUE_HOST_BUSY;
}
return 0;
out_done:
done(scmd);
return 0;
}
static DEF_SCSI_QCMD(megasas_queue_command)
static struct megasas_instance *megasas_lookup_instance(u16 host_no)
{
int i;
for (i = 0; i < megasas_mgmt_info.max_index; i++) {
if ((megasas_mgmt_info.instance[i]) &&
(megasas_mgmt_info.instance[i]->host->host_no == host_no))
return megasas_mgmt_info.instance[i];
}
return NULL;
}
static int megasas_slave_configure(struct scsi_device *sdev)
{
u16 pd_index = 0;
struct megasas_instance *instance ;
instance = megasas_lookup_instance(sdev->host->host_no);
/*
* Don't export physical disk devices to the disk driver.
*
* FIXME: Currently we don't export them to the midlayer at all.
* That will be fixed once LSI engineers have audited the
* firmware for possible issues.
*/
if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
sdev->type == TYPE_DISK) {
pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
sdev->id;
if (instance->pd_list[pd_index].driveState ==
MR_PD_STATE_SYSTEM) {
blk_queue_rq_timeout(sdev->request_queue,
MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
return 0;
}
return -ENXIO;
}
/*
* The RAID firmware may require extended timeouts.
*/
blk_queue_rq_timeout(sdev->request_queue,
MEGASAS_DEFAULT_CMD_TIMEOUT * HZ);
return 0;
}
static int megasas_slave_alloc(struct scsi_device *sdev)
{
u16 pd_index = 0;
struct megasas_instance *instance ;
instance = megasas_lookup_instance(sdev->host->host_no);
if ((sdev->channel < MEGASAS_MAX_PD_CHANNELS) &&
(sdev->type == TYPE_DISK)) {
/*
* Open the OS scan to the SYSTEM PD
*/
pd_index =
(sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
sdev->id;
if ((instance->pd_list[pd_index].driveState ==
MR_PD_STATE_SYSTEM) &&
(instance->pd_list[pd_index].driveType ==
TYPE_DISK)) {
return 0;
}
return -ENXIO;
}
return 0;
}
void megaraid_sas_kill_hba(struct megasas_instance *instance)
{
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)) {
writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
} else {
writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
}
}
/**
* megasas_check_and_restore_queue_depth - Check if queue depth needs to be
* restored to max value
* @instance: Adapter soft state
*
*/
void
megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
{
unsigned long flags;
if (instance->flag & MEGASAS_FW_BUSY
&& time_after(jiffies, instance->last_time + 5 * HZ)
&& atomic_read(&instance->fw_outstanding) <
instance->throttlequeuedepth + 1) {
spin_lock_irqsave(instance->host->host_lock, flags);
instance->flag &= ~MEGASAS_FW_BUSY;
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
instance->host->can_queue =
instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
} else
instance->host->can_queue =
instance->max_fw_cmds - MEGASAS_INT_CMDS;
spin_unlock_irqrestore(instance->host->host_lock, flags);
}
}
/**
* megasas_complete_cmd_dpc - Returns FW's controller structure
* @instance_addr: Address of adapter soft state
*
* Tasklet to complete cmds
*/
static void megasas_complete_cmd_dpc(unsigned long instance_addr)
{
u32 producer;
u32 consumer;
u32 context;
struct megasas_cmd *cmd;
struct megasas_instance *instance =
(struct megasas_instance *)instance_addr;
unsigned long flags;
/* If we have already declared adapter dead, donot complete cmds */
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR )
return;
spin_lock_irqsave(&instance->completion_lock, flags);
producer = *instance->producer;
consumer = *instance->consumer;
while (consumer != producer) {
context = instance->reply_queue[consumer];
if (context >= instance->max_fw_cmds) {
printk(KERN_ERR "Unexpected context value %x\n",
context);
BUG();
}
cmd = instance->cmd_list[context];
megasas_complete_cmd(instance, cmd, DID_OK);
consumer++;
if (consumer == (instance->max_fw_cmds + 1)) {
consumer = 0;
}
}
*instance->consumer = producer;
spin_unlock_irqrestore(&instance->completion_lock, flags);
/*
* Check if we can restore can_queue
*/
megasas_check_and_restore_queue_depth(instance);
}
static void
megasas_internal_reset_defer_cmds(struct megasas_instance *instance);
static void
process_fw_state_change_wq(struct work_struct *work);
void megasas_do_ocr(struct megasas_instance *instance)
{
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
*instance->consumer = MEGASAS_ADPRESET_INPROG_SIGN;
}
instance->instancet->disable_intr(instance->reg_set);
instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
instance->issuepend_done = 0;
atomic_set(&instance->fw_outstanding, 0);
megasas_internal_reset_defer_cmds(instance);
process_fw_state_change_wq(&instance->work_init);
}
/**
* megasas_wait_for_outstanding - Wait for all outstanding cmds
* @instance: Adapter soft state
*
* This function waits for up to MEGASAS_RESET_WAIT_TIME seconds for FW to
* complete all its outstanding commands. Returns error if one or more IOs
* are pending after this time period. It also marks the controller dead.
*/
static int megasas_wait_for_outstanding(struct megasas_instance *instance)
{
int i;
u32 reset_index;
u32 wait_time = MEGASAS_RESET_WAIT_TIME;
u8 adprecovery;
unsigned long flags;
struct list_head clist_local;
struct megasas_cmd *reset_cmd;
u32 fw_state;
u8 kill_adapter_flag;
spin_lock_irqsave(&instance->hba_lock, flags);
adprecovery = instance->adprecovery;
spin_unlock_irqrestore(&instance->hba_lock, flags);
if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
INIT_LIST_HEAD(&clist_local);
spin_lock_irqsave(&instance->hba_lock, flags);
list_splice_init(&instance->internal_reset_pending_q,
&clist_local);
spin_unlock_irqrestore(&instance->hba_lock, flags);
printk(KERN_NOTICE "megasas: HBA reset wait ...\n");
for (i = 0; i < wait_time; i++) {
msleep(1000);
spin_lock_irqsave(&instance->hba_lock, flags);
adprecovery = instance->adprecovery;
spin_unlock_irqrestore(&instance->hba_lock, flags);
if (adprecovery == MEGASAS_HBA_OPERATIONAL)
break;
}
if (adprecovery != MEGASAS_HBA_OPERATIONAL) {
printk(KERN_NOTICE "megasas: reset: Stopping HBA.\n");
spin_lock_irqsave(&instance->hba_lock, flags);
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
spin_unlock_irqrestore(&instance->hba_lock, flags);
return FAILED;
}
reset_index = 0;
while (!list_empty(&clist_local)) {
reset_cmd = list_entry((&clist_local)->next,
struct megasas_cmd, list);
list_del_init(&reset_cmd->list);
if (reset_cmd->scmd) {
reset_cmd->scmd->result = DID_RESET << 16;
printk(KERN_NOTICE "%d:%p reset [%02x]\n",
reset_index, reset_cmd,
reset_cmd->scmd->cmnd[0]);
reset_cmd->scmd->scsi_done(reset_cmd->scmd);
megasas_return_cmd(instance, reset_cmd);
} else if (reset_cmd->sync_cmd) {
printk(KERN_NOTICE "megasas:%p synch cmds"
"reset queue\n",
reset_cmd);
reset_cmd->cmd_status = ENODATA;
instance->instancet->fire_cmd(instance,
reset_cmd->frame_phys_addr,
0, instance->reg_set);
} else {
printk(KERN_NOTICE "megasas: %p unexpected"
"cmds lst\n",
reset_cmd);
}
reset_index++;
}
return SUCCESS;
}
for (i = 0; i < resetwaittime; i++) {
int outstanding = atomic_read(&instance->fw_outstanding);
if (!outstanding)
break;
if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
"commands to complete\n",i,outstanding);
/*
* Call cmd completion routine. Cmd to be
* be completed directly without depending on isr.
*/
megasas_complete_cmd_dpc((unsigned long)instance);
}
msleep(1000);
}
i = 0;
kill_adapter_flag = 0;
do {
fw_state = instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
if ((fw_state == MFI_STATE_FAULT) &&
(instance->disableOnlineCtrlReset == 0)) {
if (i == 3) {
kill_adapter_flag = 2;
break;
}
megasas_do_ocr(instance);
kill_adapter_flag = 1;
/* wait for 1 secs to let FW finish the pending cmds */
msleep(1000);
}
i++;
} while (i <= 3);
if (atomic_read(&instance->fw_outstanding) &&
!kill_adapter_flag) {
if (instance->disableOnlineCtrlReset == 0) {
megasas_do_ocr(instance);
/* wait for 5 secs to let FW finish the pending cmds */
for (i = 0; i < wait_time; i++) {
int outstanding =
atomic_read(&instance->fw_outstanding);
if (!outstanding)
return SUCCESS;
msleep(1000);
}
}
}
if (atomic_read(&instance->fw_outstanding) ||
(kill_adapter_flag == 2)) {
printk(KERN_NOTICE "megaraid_sas: pending cmds after reset\n");
/*
* Send signal to FW to stop processing any pending cmds.
* The controller will be taken offline by the OS now.
*/
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
writel(MFI_STOP_ADP,
&instance->reg_set->doorbell);
} else {
writel(MFI_STOP_ADP,
&instance->reg_set->inbound_doorbell);
}
megasas_dump_pending_frames(instance);
spin_lock_irqsave(&instance->hba_lock, flags);
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
spin_unlock_irqrestore(&instance->hba_lock, flags);
return FAILED;
}
printk(KERN_NOTICE "megaraid_sas: no pending cmds after reset\n");
return SUCCESS;
}
/**
* megasas_generic_reset - Generic reset routine
* @scmd: Mid-layer SCSI command
*
* This routine implements a generic reset handler for device, bus and host
* reset requests. Device, bus and host specific reset handlers can use this
* function after they do their specific tasks.
*/
static int megasas_generic_reset(struct scsi_cmnd *scmd)
{
int ret_val;
struct megasas_instance *instance;
instance = (struct megasas_instance *)scmd->device->host->hostdata;
scmd_printk(KERN_NOTICE, scmd, "megasas: RESET cmd=%x retries=%x\n",
scmd->cmnd[0], scmd->retries);
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
printk(KERN_ERR "megasas: cannot recover from previous reset "
"failures\n");
return FAILED;
}
ret_val = megasas_wait_for_outstanding(instance);
if (ret_val == SUCCESS)
printk(KERN_NOTICE "megasas: reset successful \n");
else
printk(KERN_ERR "megasas: failed to do reset\n");
return ret_val;
}
/**
* megasas_reset_timer - quiesce the adapter if required
* @scmd: scsi cmnd
*
* Sets the FW busy flag and reduces the host->can_queue if the
* cmd has not been completed within the timeout period.
*/
static enum
blk_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
{
struct megasas_instance *instance;
unsigned long flags;
if (time_after(jiffies, scmd->jiffies_at_alloc +
(MEGASAS_DEFAULT_CMD_TIMEOUT * 2) * HZ)) {
return BLK_EH_NOT_HANDLED;
}
instance = (struct megasas_instance *)scmd->device->host->hostdata;
if (!(instance->flag & MEGASAS_FW_BUSY)) {
/* FW is busy, throttle IO */
spin_lock_irqsave(instance->host->host_lock, flags);
instance->host->can_queue = instance->throttlequeuedepth;
instance->last_time = jiffies;
instance->flag |= MEGASAS_FW_BUSY;
spin_unlock_irqrestore(instance->host->host_lock, flags);
}
return BLK_EH_RESET_TIMER;
}
/**
* megasas_reset_device - Device reset handler entry point
*/
static int megasas_reset_device(struct scsi_cmnd *scmd)
{
int ret;
/*
* First wait for all commands to complete
*/
ret = megasas_generic_reset(scmd);
return ret;
}
/**
* megasas_reset_bus_host - Bus & host reset handler entry point
*/
static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
{
int ret;
struct megasas_instance *instance;
instance = (struct megasas_instance *)scmd->device->host->hostdata;
/*
* First wait for all commands to complete
*/
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER))
ret = megasas_reset_fusion(scmd->device->host);
else
ret = megasas_generic_reset(scmd);
return ret;
}
/**
* megasas_bios_param - Returns disk geometry for a disk
* @sdev: device handle
* @bdev: block device
* @capacity: drive capacity
* @geom: geometry parameters
*/
static int
megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
int heads;
int sectors;
sector_t cylinders;
unsigned long tmp;
/* Default heads (64) & sectors (32) */
heads = 64;
sectors = 32;
tmp = heads * sectors;
cylinders = capacity;
sector_div(cylinders, tmp);
/*
* Handle extended translation size for logical drives > 1Gb
*/
if (capacity >= 0x200000) {
heads = 255;
sectors = 63;
tmp = heads*sectors;
cylinders = capacity;
sector_div(cylinders, tmp);
}
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
return 0;
}
static void megasas_aen_polling(struct work_struct *work);
/**
* megasas_service_aen - Processes an event notification
* @instance: Adapter soft state
* @cmd: AEN command completed by the ISR
*
* For AEN, driver sends a command down to FW that is held by the FW till an
* event occurs. When an event of interest occurs, FW completes the command
* that it was previously holding.
*
* This routines sends SIGIO signal to processes that have registered with the
* driver for AEN.
*/
static void
megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
unsigned long flags;
/*
* Don't signal app if it is just an aborted previously registered aen
*/
if ((!cmd->abort_aen) && (instance->unload == 0)) {
spin_lock_irqsave(&poll_aen_lock, flags);
megasas_poll_wait_aen = 1;
spin_unlock_irqrestore(&poll_aen_lock, flags);
wake_up(&megasas_poll_wait);
kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
}
else
cmd->abort_aen = 0;
instance->aen_cmd = NULL;
megasas_return_cmd(instance, cmd);
if ((instance->unload == 0) &&
((instance->issuepend_done == 1))) {
struct megasas_aen_event *ev;
ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
if (!ev) {
printk(KERN_ERR "megasas_service_aen: out of memory\n");
} else {
ev->instance = instance;
instance->ev = ev;
INIT_WORK(&ev->hotplug_work, megasas_aen_polling);
schedule_delayed_work(
(struct delayed_work *)&ev->hotplug_work, 0);
}
}
}
static int megasas_change_queue_depth(struct scsi_device *sdev,
int queue_depth, int reason)
{
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
if (queue_depth > sdev->host->can_queue)
queue_depth = sdev->host->can_queue;
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev),
queue_depth);
return queue_depth;
}
/*
* Scsi host template for megaraid_sas driver
*/
static struct scsi_host_template megasas_template = {
.module = THIS_MODULE,
.name = "LSI SAS based MegaRAID driver",
.proc_name = "megaraid_sas",
.slave_configure = megasas_slave_configure,
.slave_alloc = megasas_slave_alloc,
.queuecommand = megasas_queue_command,
.eh_device_reset_handler = megasas_reset_device,
.eh_bus_reset_handler = megasas_reset_bus_host,
.eh_host_reset_handler = megasas_reset_bus_host,
.eh_timed_out = megasas_reset_timer,
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
.change_queue_depth = megasas_change_queue_depth,
};
/**
* megasas_complete_int_cmd - Completes an internal command
* @instance: Adapter soft state
* @cmd: Command to be completed
*
* The megasas_issue_blocked_cmd() function waits for a command to complete
* after it issues a command. This function wakes up that waiting routine by
* calling wake_up() on the wait queue.
*/
static void
megasas_complete_int_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd)
{
cmd->cmd_status = cmd->frame->io.cmd_status;
if (cmd->cmd_status == ENODATA) {
cmd->cmd_status = 0;
}
wake_up(&instance->int_cmd_wait_q);
}
/**
* megasas_complete_abort - Completes aborting a command
* @instance: Adapter soft state
* @cmd: Cmd that was issued to abort another cmd
*
* The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
* after it issues an abort on a previously issued command. This function
* wakes up all functions waiting on the same wait queue.
*/
static void
megasas_complete_abort(struct megasas_instance *instance,
struct megasas_cmd *cmd)
{
if (cmd->sync_cmd) {
cmd->sync_cmd = 0;
cmd->cmd_status = 0;
wake_up(&instance->abort_cmd_wait_q);
}
return;
}
/**
* megasas_complete_cmd - Completes a command
* @instance: Adapter soft state
* @cmd: Command to be completed
* @alt_status: If non-zero, use this value as status to
* SCSI mid-layer instead of the value returned
* by the FW. This should be used if caller wants
* an alternate status (as in the case of aborted
* commands)
*/
void
megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
u8 alt_status)
{
int exception = 0;
struct megasas_header *hdr = &cmd->frame->hdr;
unsigned long flags;
struct fusion_context *fusion = instance->ctrl_context;
/* flag for the retry reset */
cmd->retry_for_fw_reset = 0;
if (cmd->scmd)
cmd->scmd->SCp.ptr = NULL;
switch (hdr->cmd) {
case MFI_CMD_INVALID:
/* Some older 1068 controller FW may keep a pended
MR_DCMD_CTRL_EVENT_GET_INFO left over from the main kernel
when booting the kdump kernel. Ignore this command to
prevent a kernel panic on shutdown of the kdump kernel. */
printk(KERN_WARNING "megaraid_sas: MFI_CMD_INVALID command "
"completed.\n");
printk(KERN_WARNING "megaraid_sas: If you have a controller "
"other than PERC5, please upgrade your firmware.\n");
break;
case MFI_CMD_PD_SCSI_IO:
case MFI_CMD_LD_SCSI_IO:
/*
* MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
* issued either through an IO path or an IOCTL path. If it
* was via IOCTL, we will send it to internal completion.
*/
if (cmd->sync_cmd) {
cmd->sync_cmd = 0;
megasas_complete_int_cmd(instance, cmd);
break;
}
case MFI_CMD_LD_READ:
case MFI_CMD_LD_WRITE:
if (alt_status) {
cmd->scmd->result = alt_status << 16;
exception = 1;
}
if (exception) {
atomic_dec(&instance->fw_outstanding);
scsi_dma_unmap(cmd->scmd);
cmd->scmd->scsi_done(cmd->scmd);
megasas_return_cmd(instance, cmd);
break;
}
switch (hdr->cmd_status) {
case MFI_STAT_OK:
cmd->scmd->result = DID_OK << 16;
break;
case MFI_STAT_SCSI_IO_FAILED:
case MFI_STAT_LD_INIT_IN_PROGRESS:
cmd->scmd->result =
(DID_ERROR << 16) | hdr->scsi_status;
break;
case MFI_STAT_SCSI_DONE_WITH_ERROR:
cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
memset(cmd->scmd->sense_buffer, 0,
SCSI_SENSE_BUFFERSIZE);
memcpy(cmd->scmd->sense_buffer, cmd->sense,
hdr->sense_len);
cmd->scmd->result |= DRIVER_SENSE << 24;
}
break;
case MFI_STAT_LD_OFFLINE:
case MFI_STAT_DEVICE_NOT_FOUND:
cmd->scmd->result = DID_BAD_TARGET << 16;
break;
default:
printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
hdr->cmd_status);
cmd->scmd->result = DID_ERROR << 16;
break;
}
atomic_dec(&instance->fw_outstanding);
scsi_dma_unmap(cmd->scmd);
cmd->scmd->scsi_done(cmd->scmd);
megasas_return_cmd(instance, cmd);
break;
case MFI_CMD_SMP:
case MFI_CMD_STP:
case MFI_CMD_DCMD:
/* Check for LD map update */
if ((cmd->frame->dcmd.opcode == MR_DCMD_LD_MAP_GET_INFO) &&
(cmd->frame->dcmd.mbox.b[1] == 1)) {
spin_lock_irqsave(instance->host->host_lock, flags);
if (cmd->frame->hdr.cmd_status != 0) {
if (cmd->frame->hdr.cmd_status !=
MFI_STAT_NOT_FOUND)
printk(KERN_WARNING "megasas: map sync"
"failed, status = 0x%x.\n",
cmd->frame->hdr.cmd_status);
else {
megasas_return_cmd(instance, cmd);
spin_unlock_irqrestore(
instance->host->host_lock,
flags);
break;
}
} else
instance->map_id++;
megasas_return_cmd(instance, cmd);
if (MR_ValidateMapInfo(
fusion->ld_map[(instance->map_id & 1)],
fusion->load_balance_info))
fusion->fast_path_io = 1;
else
fusion->fast_path_io = 0;
megasas_sync_map_info(instance);
spin_unlock_irqrestore(instance->host->host_lock,
flags);
break;
}
if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET) {
spin_lock_irqsave(&poll_aen_lock, flags);
megasas_poll_wait_aen = 0;
spin_unlock_irqrestore(&poll_aen_lock, flags);
}
/*
* See if got an event notification
*/
if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
megasas_service_aen(instance, cmd);
else
megasas_complete_int_cmd(instance, cmd);
break;
case MFI_CMD_ABORT:
/*
* Cmd issued to abort another cmd returned
*/
megasas_complete_abort(instance, cmd);
break;
default:
printk("megasas: Unknown command completed! [0x%X]\n",
hdr->cmd);
break;
}
}
/**
* megasas_issue_pending_cmds_again - issue all pending cmds
* in FW again because of the fw reset
* @instance: Adapter soft state
*/
static inline void
megasas_issue_pending_cmds_again(struct megasas_instance *instance)
{
struct megasas_cmd *cmd;
struct list_head clist_local;
union megasas_evt_class_locale class_locale;
unsigned long flags;
u32 seq_num;
INIT_LIST_HEAD(&clist_local);
spin_lock_irqsave(&instance->hba_lock, flags);
list_splice_init(&instance->internal_reset_pending_q, &clist_local);
spin_unlock_irqrestore(&instance->hba_lock, flags);
while (!list_empty(&clist_local)) {
cmd = list_entry((&clist_local)->next,
struct megasas_cmd, list);
list_del_init(&cmd->list);
if (cmd->sync_cmd || cmd->scmd) {
printk(KERN_NOTICE "megaraid_sas: command %p, %p:%d"
"detected to be pending while HBA reset.\n",
cmd, cmd->scmd, cmd->sync_cmd);
cmd->retry_for_fw_reset++;
if (cmd->retry_for_fw_reset == 3) {
printk(KERN_NOTICE "megaraid_sas: cmd %p, %p:%d"
"was tried multiple times during reset."
"Shutting down the HBA\n",
cmd, cmd->scmd, cmd->sync_cmd);
megaraid_sas_kill_hba(instance);
instance->adprecovery =
MEGASAS_HW_CRITICAL_ERROR;
return;
}
}
if (cmd->sync_cmd == 1) {
if (cmd->scmd) {
printk(KERN_NOTICE "megaraid_sas: unexpected"
"cmd attached to internal command!\n");
}
printk(KERN_NOTICE "megasas: %p synchronous cmd"
"on the internal reset queue,"
"issue it again.\n", cmd);
cmd->cmd_status = ENODATA;
instance->instancet->fire_cmd(instance,
cmd->frame_phys_addr ,
0, instance->reg_set);
} else if (cmd->scmd) {
printk(KERN_NOTICE "megasas: %p scsi cmd [%02x]"
"detected on the internal queue, issue again.\n",
cmd, cmd->scmd->cmnd[0]);
atomic_inc(&instance->fw_outstanding);
instance->instancet->fire_cmd(instance,
cmd->frame_phys_addr,
cmd->frame_count-1, instance->reg_set);
} else {
printk(KERN_NOTICE "megasas: %p unexpected cmd on the"
"internal reset defer list while re-issue!!\n",
cmd);
}
}
if (instance->aen_cmd) {
printk(KERN_NOTICE "megaraid_sas: aen_cmd in def process\n");
megasas_return_cmd(instance, instance->aen_cmd);
instance->aen_cmd = NULL;
}
/*
* Initiate AEN (Asynchronous Event Notification)
*/
seq_num = instance->last_seq_num;
class_locale.members.reserved = 0;
class_locale.members.locale = MR_EVT_LOCALE_ALL;
class_locale.members.class = MR_EVT_CLASS_DEBUG;
megasas_register_aen(instance, seq_num, class_locale.word);
}
/**
* Move the internal reset pending commands to a deferred queue.
*
* We move the commands pending at internal reset time to a
* pending queue. This queue would be flushed after successful
* completion of the internal reset sequence. if the internal reset
* did not complete in time, the kernel reset handler would flush
* these commands.
**/
static void
megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
{
struct megasas_cmd *cmd;
int i;
u32 max_cmd = instance->max_fw_cmds;
u32 defer_index;
unsigned long flags;
defer_index = 0;
spin_lock_irqsave(&instance->cmd_pool_lock, flags);
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
if (cmd->sync_cmd == 1 || cmd->scmd) {
printk(KERN_NOTICE "megasas: moving cmd[%d]:%p:%d:%p"
"on the defer queue as internal\n",
defer_index, cmd, cmd->sync_cmd, cmd->scmd);
if (!list_empty(&cmd->list)) {
printk(KERN_NOTICE "megaraid_sas: ERROR while"
" moving this cmd:%p, %d %p, it was"
"discovered on some list?\n",
cmd, cmd->sync_cmd, cmd->scmd);
list_del_init(&cmd->list);
}
defer_index++;
list_add_tail(&cmd->list,
&instance->internal_reset_pending_q);
}
}
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
}
static void
process_fw_state_change_wq(struct work_struct *work)
{
struct megasas_instance *instance =
container_of(work, struct megasas_instance, work_init);
u32 wait;
unsigned long flags;
if (instance->adprecovery != MEGASAS_ADPRESET_SM_INFAULT) {
printk(KERN_NOTICE "megaraid_sas: error, recovery st %x \n",
instance->adprecovery);
return ;
}
if (instance->adprecovery == MEGASAS_ADPRESET_SM_INFAULT) {
printk(KERN_NOTICE "megaraid_sas: FW detected to be in fault"
"state, restarting it...\n");
instance->instancet->disable_intr(instance->reg_set);
atomic_set(&instance->fw_outstanding, 0);
atomic_set(&instance->fw_reset_no_pci_access, 1);
instance->instancet->adp_reset(instance, instance->reg_set);
atomic_set(&instance->fw_reset_no_pci_access, 0 );
printk(KERN_NOTICE "megaraid_sas: FW restarted successfully,"
"initiating next stage...\n");
printk(KERN_NOTICE "megaraid_sas: HBA recovery state machine,"
"state 2 starting...\n");
/*waitting for about 20 second before start the second init*/
for (wait = 0; wait < 30; wait++) {
msleep(1000);
}
if (megasas_transition_to_ready(instance, 1)) {
printk(KERN_NOTICE "megaraid_sas:adapter not ready\n");
megaraid_sas_kill_hba(instance);
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
return ;
}
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1064R) ||
(instance->pdev->device == PCI_DEVICE_ID_DELL_PERC5) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_VERDE_ZCR)
) {
*instance->consumer = *instance->producer;
} else {
*instance->consumer = 0;
*instance->producer = 0;
}
megasas_issue_init_mfi(instance);
spin_lock_irqsave(&instance->hba_lock, flags);
instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
spin_unlock_irqrestore(&instance->hba_lock, flags);
instance->instancet->enable_intr(instance->reg_set);
megasas_issue_pending_cmds_again(instance);
instance->issuepend_done = 1;
}
return ;
}
/**
* megasas_deplete_reply_queue - Processes all completed commands
* @instance: Adapter soft state
* @alt_status: Alternate status to be returned to
* SCSI mid-layer instead of the status
* returned by the FW
* Note: this must be called with hba lock held
*/
static int
megasas_deplete_reply_queue(struct megasas_instance *instance,
u8 alt_status)
{
u32 mfiStatus;
u32 fw_state;
if ((mfiStatus = instance->instancet->check_reset(instance,
instance->reg_set)) == 1) {
return IRQ_HANDLED;
}
if ((mfiStatus = instance->instancet->clear_intr(
instance->reg_set)
) == 0) {
/* Hardware may not set outbound_intr_status in MSI-X mode */
if (!instance->msix_vectors)
return IRQ_NONE;
}
instance->mfiStatus = mfiStatus;
if ((mfiStatus & MFI_INTR_FLAG_FIRMWARE_STATE_CHANGE)) {
fw_state = instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
if (fw_state != MFI_STATE_FAULT) {
printk(KERN_NOTICE "megaraid_sas: fw state:%x\n",
fw_state);
}
if ((fw_state == MFI_STATE_FAULT) &&
(instance->disableOnlineCtrlReset == 0)) {
printk(KERN_NOTICE "megaraid_sas: wait adp restart\n");
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS1064R) ||
(instance->pdev->device ==
PCI_DEVICE_ID_DELL_PERC5) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_VERDE_ZCR)) {
*instance->consumer =
MEGASAS_ADPRESET_INPROG_SIGN;
}
instance->instancet->disable_intr(instance->reg_set);
instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
instance->issuepend_done = 0;
atomic_set(&instance->fw_outstanding, 0);
megasas_internal_reset_defer_cmds(instance);
printk(KERN_NOTICE "megasas: fwState=%x, stage:%d\n",
fw_state, instance->adprecovery);
schedule_work(&instance->work_init);
return IRQ_HANDLED;
} else {
printk(KERN_NOTICE "megasas: fwstate:%x, dis_OCR=%x\n",
fw_state, instance->disableOnlineCtrlReset);
}
}
tasklet_schedule(&instance->isr_tasklet);
return IRQ_HANDLED;
}
/**
* megasas_isr - isr entry point
*/
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
static irqreturn_t megasas_isr(int irq, void *devp)
{
struct megasas_irq_context *irq_context = devp;
struct megasas_instance *instance = irq_context->instance;
unsigned long flags;
irqreturn_t rc;
if (atomic_read(&instance->fw_reset_no_pci_access))
return IRQ_HANDLED;
spin_lock_irqsave(&instance->hba_lock, flags);
rc = megasas_deplete_reply_queue(instance, DID_OK);
spin_unlock_irqrestore(&instance->hba_lock, flags);
return rc;
}
/**
* megasas_transition_to_ready - Move the FW to READY state
* @instance: Adapter soft state
*
* During the initialization, FW passes can potentially be in any one of
* several possible states. If the FW in operational, waiting-for-handshake
* states, driver must take steps to bring it to ready state. Otherwise, it
* has to wait for the ready state.
*/
int
megasas_transition_to_ready(struct megasas_instance *instance, int ocr)
{
int i;
u8 max_wait;
u32 fw_state;
u32 cur_state;
u32 abs_state, curr_abs_state;
fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
if (fw_state != MFI_STATE_READY)
printk(KERN_INFO "megasas: Waiting for FW to come to ready"
" state\n");
while (fw_state != MFI_STATE_READY) {
abs_state =
instance->instancet->read_fw_status_reg(instance->reg_set);
switch (fw_state) {
case MFI_STATE_FAULT:
printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
if (ocr) {
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_FAULT;
break;
} else
return -ENODEV;
case MFI_STATE_WAIT_HANDSHAKE:
/*
* Set the CLR bit in inbound doorbell
*/
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER)) {
writel(
MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
&instance->reg_set->doorbell);
} else {
writel(
MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
&instance->reg_set->inbound_doorbell);
}
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_WAIT_HANDSHAKE;
break;
case MFI_STATE_BOOT_MESSAGE_PENDING:
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER)) {
writel(MFI_INIT_HOTPLUG,
&instance->reg_set->doorbell);
} else
writel(MFI_INIT_HOTPLUG,
&instance->reg_set->inbound_doorbell);
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
break;
case MFI_STATE_OPERATIONAL:
/*
* Bring it to READY state; assuming max wait 10 secs
*/
instance->instancet->disable_intr(instance->reg_set);
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
(instance->pdev->device
== PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device
== PCI_DEVICE_ID_LSI_INVADER)) {
writel(MFI_RESET_FLAGS,
&instance->reg_set->doorbell);
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER)) {
for (i = 0; i < (10 * 1000); i += 20) {
if (readl(
&instance->
reg_set->
doorbell) & 1)
msleep(20);
else
break;
}
}
} else
writel(MFI_RESET_FLAGS,
&instance->reg_set->inbound_doorbell);
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_OPERATIONAL;
break;
case MFI_STATE_UNDEFINED:
/*
* This state should not last for more than 2 seconds
*/
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_UNDEFINED;
break;
case MFI_STATE_BB_INIT:
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_BB_INIT;
break;
case MFI_STATE_FW_INIT:
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_FW_INIT;
break;
case MFI_STATE_FW_INIT_2:
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_FW_INIT_2;
break;
case MFI_STATE_DEVICE_SCAN:
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_DEVICE_SCAN;
break;
case MFI_STATE_FLUSH_CACHE:
max_wait = MEGASAS_RESET_WAIT_TIME;
cur_state = MFI_STATE_FLUSH_CACHE;
break;
default:
printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
fw_state);
return -ENODEV;
}
/*
* The cur_state should not last for more than max_wait secs
*/
for (i = 0; i < (max_wait * 1000); i++) {
fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
MFI_STATE_MASK ;
curr_abs_state =
instance->instancet->read_fw_status_reg(instance->reg_set);
if (abs_state == curr_abs_state) {
msleep(1);
} else
break;
}
/*
* Return error if fw_state hasn't changed after max_wait
*/
if (curr_abs_state == abs_state) {
printk(KERN_DEBUG "FW state [%d] hasn't changed "
"in %d secs\n", fw_state, max_wait);
return -ENODEV;
}
}
printk(KERN_INFO "megasas: FW now in Ready state\n");
return 0;
}
/**
* megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
* @instance: Adapter soft state
*/
static void megasas_teardown_frame_pool(struct megasas_instance *instance)
{
int i;
u32 max_cmd = instance->max_mfi_cmds;
struct megasas_cmd *cmd;
if (!instance->frame_dma_pool)
return;
/*
* Return all frames to pool
*/
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
if (cmd->frame)
pci_pool_free(instance->frame_dma_pool, cmd->frame,
cmd->frame_phys_addr);
if (cmd->sense)
pci_pool_free(instance->sense_dma_pool, cmd->sense,
cmd->sense_phys_addr);
}
/*
* Now destroy the pool itself
*/
pci_pool_destroy(instance->frame_dma_pool);
pci_pool_destroy(instance->sense_dma_pool);
instance->frame_dma_pool = NULL;
instance->sense_dma_pool = NULL;
}
/**
* megasas_create_frame_pool - Creates DMA pool for cmd frames
* @instance: Adapter soft state
*
* Each command packet has an embedded DMA memory buffer that is used for
* filling MFI frame and the SG list that immediately follows the frame. This
* function creates those DMA memory buffers for each command packet by using
* PCI pool facility.
*/
static int megasas_create_frame_pool(struct megasas_instance *instance)
{
int i;
u32 max_cmd;
u32 sge_sz;
u32 sgl_sz;
u32 total_sz;
u32 frame_count;
struct megasas_cmd *cmd;
max_cmd = instance->max_mfi_cmds;
/*
* Size of our frame is 64 bytes for MFI frame, followed by max SG
* elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
*/
sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
sizeof(struct megasas_sge32);
if (instance->flag_ieee) {
sge_sz = sizeof(struct megasas_sge_skinny);
}
/*
* Calculated the number of 64byte frames required for SGL
*/
sgl_sz = sge_sz * instance->max_num_sge;
frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
frame_count = 15;
/*
* We need one extra frame for the MFI command
*/
frame_count++;
total_sz = MEGAMFI_FRAME_SIZE * frame_count;
/*
* Use DMA pool facility provided by PCI layer
*/
instance->frame_dma_pool = pci_pool_create("megasas frame pool",
instance->pdev, total_sz, 64,
0);
if (!instance->frame_dma_pool) {
printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
return -ENOMEM;
}
instance->sense_dma_pool = pci_pool_create("megasas sense pool",
instance->pdev, 128, 4, 0);
if (!instance->sense_dma_pool) {
printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
pci_pool_destroy(instance->frame_dma_pool);
instance->frame_dma_pool = NULL;
return -ENOMEM;
}
/*
* Allocate and attach a frame to each of the commands in cmd_list.
* By making cmd->index as the context instead of the &cmd, we can
* always use 32bit context regardless of the architecture
*/
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
GFP_KERNEL, &cmd->frame_phys_addr);
cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
GFP_KERNEL, &cmd->sense_phys_addr);
/*
* megasas_teardown_frame_pool() takes care of freeing
* whatever has been allocated
*/
if (!cmd->frame || !cmd->sense) {
printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
megasas_teardown_frame_pool(instance);
return -ENOMEM;
}
memset(cmd->frame, 0, total_sz);
cmd->frame->io.context = cmd->index;
cmd->frame->io.pad_0 = 0;
if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
(reset_devices))
cmd->frame->hdr.cmd = MFI_CMD_INVALID;
}
return 0;
}
/**
* megasas_free_cmds - Free all the cmds in the free cmd pool
* @instance: Adapter soft state
*/
void megasas_free_cmds(struct megasas_instance *instance)
{
int i;
/* First free the MFI frame pool */
megasas_teardown_frame_pool(instance);
/* Free all the commands in the cmd_list */
for (i = 0; i < instance->max_mfi_cmds; i++)
kfree(instance->cmd_list[i]);
/* Free the cmd_list buffer itself */
kfree(instance->cmd_list);
instance->cmd_list = NULL;
INIT_LIST_HEAD(&instance->cmd_pool);
}
/**
* megasas_alloc_cmds - Allocates the command packets
* @instance: Adapter soft state
*
* Each command that is issued to the FW, whether IO commands from the OS or
* internal commands like IOCTLs, are wrapped in local data structure called
* megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
* the FW.
*
* Each frame has a 32-bit field called context (tag). This context is used
* to get back the megasas_cmd from the frame when a frame gets completed in
* the ISR. Typically the address of the megasas_cmd itself would be used as
* the context. But we wanted to keep the differences between 32 and 64 bit
* systems to the mininum. We always use 32 bit integers for the context. In
* this driver, the 32 bit values are the indices into an array cmd_list.
* This array is used only to look up the megasas_cmd given the context. The
* free commands themselves are maintained in a linked list called cmd_pool.
*/
int megasas_alloc_cmds(struct megasas_instance *instance)
{
int i;
int j;
u32 max_cmd;
struct megasas_cmd *cmd;
max_cmd = instance->max_mfi_cmds;
/*
* instance->cmd_list is an array of struct megasas_cmd pointers.
* Allocate the dynamic array first and then allocate individual
* commands.
*/
2007-07-19 08:49:03 +00:00
instance->cmd_list = kcalloc(max_cmd, sizeof(struct megasas_cmd*), GFP_KERNEL);
if (!instance->cmd_list) {
printk(KERN_DEBUG "megasas: out of memory\n");
return -ENOMEM;
}
memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
for (i = 0; i < max_cmd; i++) {
instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
GFP_KERNEL);
if (!instance->cmd_list[i]) {
for (j = 0; j < i; j++)
kfree(instance->cmd_list[j]);
kfree(instance->cmd_list);
instance->cmd_list = NULL;
return -ENOMEM;
}
}
/*
* Add all the commands to command pool (instance->cmd_pool)
*/
for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i];
memset(cmd, 0, sizeof(struct megasas_cmd));
cmd->index = i;
cmd->scmd = NULL;
cmd->instance = instance;
list_add_tail(&cmd->list, &instance->cmd_pool);
}
/*
* Create a frame pool and assign one frame to each cmd
*/
if (megasas_create_frame_pool(instance)) {
printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
megasas_free_cmds(instance);
}
return 0;
}
/*
* megasas_get_pd_list_info - Returns FW's pd_list structure
* @instance: Adapter soft state
* @pd_list: pd_list structure
*
* Issues an internal command (DCMD) to get the FW's controller PD
* list structure. This information is mainly used to find out SYSTEM
* supported by the FW.
*/
static int
megasas_get_pd_list(struct megasas_instance *instance)
{
int ret = 0, pd_index = 0;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
struct MR_PD_LIST *ci;
struct MR_PD_ADDRESS *pd_addr;
dma_addr_t ci_h = 0;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas (get_pd_list): Failed to get cmd\n");
return -ENOMEM;
}
dcmd = &cmd->frame->dcmd;
ci = pci_alloc_consistent(instance->pdev,
MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), &ci_h);
if (!ci) {
printk(KERN_DEBUG "Failed to alloc mem for pd_list\n");
megasas_return_cmd(instance, cmd);
return -ENOMEM;
}
memset(ci, 0, sizeof(*ci));
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->mbox.b[0] = MR_PD_QUERY_TYPE_EXPOSED_TO_HOST;
dcmd->mbox.b[1] = 0;
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0xFF;
dcmd->sge_count = 1;
dcmd->flags = MFI_FRAME_DIR_READ;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
dcmd->opcode = MR_DCMD_PD_LIST_QUERY;
dcmd->sgl.sge32[0].phys_addr = ci_h;
dcmd->sgl.sge32[0].length = MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST);
if (!megasas_issue_polled(instance, cmd)) {
ret = 0;
} else {
ret = -1;
}
/*
* the following function will get the instance PD LIST.
*/
pd_addr = ci->addr;
if ( ret == 0 &&
(ci->count <
(MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) {
memset(instance->pd_list, 0,
MEGASAS_MAX_PD * sizeof(struct megasas_pd_list));
for (pd_index = 0; pd_index < ci->count; pd_index++) {
instance->pd_list[pd_addr->deviceId].tid =
pd_addr->deviceId;
instance->pd_list[pd_addr->deviceId].driveType =
pd_addr->scsiDevType;
instance->pd_list[pd_addr->deviceId].driveState =
MR_PD_STATE_SYSTEM;
pd_addr++;
}
}
pci_free_consistent(instance->pdev,
MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
ci, ci_h);
megasas_return_cmd(instance, cmd);
return ret;
}
/*
* megasas_get_ld_list_info - Returns FW's ld_list structure
* @instance: Adapter soft state
* @ld_list: ld_list structure
*
* Issues an internal command (DCMD) to get the FW's controller PD
* list structure. This information is mainly used to find out SYSTEM
* supported by the FW.
*/
static int
megasas_get_ld_list(struct megasas_instance *instance)
{
int ret = 0, ld_index = 0, ids = 0;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
struct MR_LD_LIST *ci;
dma_addr_t ci_h = 0;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas_get_ld_list: Failed to get cmd\n");
return -ENOMEM;
}
dcmd = &cmd->frame->dcmd;
ci = pci_alloc_consistent(instance->pdev,
sizeof(struct MR_LD_LIST),
&ci_h);
if (!ci) {
printk(KERN_DEBUG "Failed to alloc mem in get_ld_list\n");
megasas_return_cmd(instance, cmd);
return -ENOMEM;
}
memset(ci, 0, sizeof(*ci));
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0xFF;
dcmd->sge_count = 1;
dcmd->flags = MFI_FRAME_DIR_READ;
dcmd->timeout = 0;
dcmd->data_xfer_len = sizeof(struct MR_LD_LIST);
dcmd->opcode = MR_DCMD_LD_GET_LIST;
dcmd->sgl.sge32[0].phys_addr = ci_h;
dcmd->sgl.sge32[0].length = sizeof(struct MR_LD_LIST);
dcmd->pad_0 = 0;
if (!megasas_issue_polled(instance, cmd)) {
ret = 0;
} else {
ret = -1;
}
/* the following function will get the instance PD LIST */
if ((ret == 0) && (ci->ldCount <= MAX_LOGICAL_DRIVES)) {
memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
for (ld_index = 0; ld_index < ci->ldCount; ld_index++) {
if (ci->ldList[ld_index].state != 0) {
ids = ci->ldList[ld_index].ref.targetId;
instance->ld_ids[ids] =
ci->ldList[ld_index].ref.targetId;
}
}
}
pci_free_consistent(instance->pdev,
sizeof(struct MR_LD_LIST),
ci,
ci_h);
megasas_return_cmd(instance, cmd);
return ret;
}
/**
* megasas_get_controller_info - Returns FW's controller structure
* @instance: Adapter soft state
* @ctrl_info: Controller information structure
*
* Issues an internal command (DCMD) to get the FW's controller structure.
* This information is mainly used to find out the maximum IO transfer per
* command supported by the FW.
*/
static int
megasas_get_ctrl_info(struct megasas_instance *instance,
struct megasas_ctrl_info *ctrl_info)
{
int ret = 0;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
struct megasas_ctrl_info *ci;
dma_addr_t ci_h = 0;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
return -ENOMEM;
}
dcmd = &cmd->frame->dcmd;
ci = pci_alloc_consistent(instance->pdev,
sizeof(struct megasas_ctrl_info), &ci_h);
if (!ci) {
printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
megasas_return_cmd(instance, cmd);
return -ENOMEM;
}
memset(ci, 0, sizeof(*ci));
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0xFF;
dcmd->sge_count = 1;
dcmd->flags = MFI_FRAME_DIR_READ;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
dcmd->sgl.sge32[0].phys_addr = ci_h;
dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
if (!megasas_issue_polled(instance, cmd)) {
ret = 0;
memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
} else {
ret = -1;
}
pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
ci, ci_h);
megasas_return_cmd(instance, cmd);
return ret;
}
/**
* megasas_issue_init_mfi - Initializes the FW
* @instance: Adapter soft state
*
* Issues the INIT MFI cmd
*/
static int
megasas_issue_init_mfi(struct megasas_instance *instance)
{
u32 context;
struct megasas_cmd *cmd;
struct megasas_init_frame *init_frame;
struct megasas_init_queue_info *initq_info;
dma_addr_t init_frame_h;
dma_addr_t initq_info_h;
/*
* Prepare a init frame. Note the init frame points to queue info
* structure. Each frame has SGL allocated after first 64 bytes. For
* this frame - since we don't need any SGL - we use SGL's space as
* queue info structure
*
* We will not get a NULL command below. We just created the pool.
*/
cmd = megasas_get_cmd(instance);
init_frame = (struct megasas_init_frame *)cmd->frame;
initq_info = (struct megasas_init_queue_info *)
((unsigned long)init_frame + 64);
init_frame_h = cmd->frame_phys_addr;
initq_info_h = init_frame_h + 64;
context = init_frame->context;
memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
init_frame->context = context;
initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
initq_info->producer_index_phys_addr_lo = instance->producer_h;
initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
init_frame->cmd = MFI_CMD_INIT;
init_frame->cmd_status = 0xFF;
init_frame->queue_info_new_phys_addr_lo = initq_info_h;
init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
/*
* disable the intr before firing the init frame to FW
*/
instance->instancet->disable_intr(instance->reg_set);
/*
* Issue the init frame in polled mode
*/
if (megasas_issue_polled(instance, cmd)) {
printk(KERN_ERR "megasas: Failed to init firmware\n");
megasas_return_cmd(instance, cmd);
goto fail_fw_init;
}
megasas_return_cmd(instance, cmd);
return 0;
fail_fw_init:
return -EINVAL;
}
static u32
megasas_init_adapter_mfi(struct megasas_instance *instance)
{
struct megasas_register_set __iomem *reg_set;
u32 context_sz;
u32 reply_q_sz;
reg_set = instance->reg_set;
/*
* Get various operational parameters from status register
*/
instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
/*
* Reduce the max supported cmds by 1. This is to ensure that the
* reply_q_sz (1 more than the max cmd that driver may send)
* does not exceed max cmds that the FW can support
*/
instance->max_fw_cmds = instance->max_fw_cmds-1;
instance->max_mfi_cmds = instance->max_fw_cmds;
instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
0x10;
/*
* Create a pool of commands
*/
if (megasas_alloc_cmds(instance))
goto fail_alloc_cmds;
/*
* Allocate memory for reply queue. Length of reply queue should
* be _one_ more than the maximum commands handled by the firmware.
*
* Note: When FW completes commands, it places corresponding contex
* values in this circular reply queue. This circular queue is a fairly
* typical producer-consumer queue. FW is the producer (of completed
* commands) and the driver is the consumer.
*/
context_sz = sizeof(u32);
reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
instance->reply_queue = pci_alloc_consistent(instance->pdev,
reply_q_sz,
&instance->reply_queue_h);
if (!instance->reply_queue) {
printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
goto fail_reply_queue;
}
if (megasas_issue_init_mfi(instance))
goto fail_fw_init;
instance->fw_support_ieee = 0;
instance->fw_support_ieee =
(instance->instancet->read_fw_status_reg(reg_set) &
0x04000000);
printk(KERN_NOTICE "megasas_init_mfi: fw_support_ieee=%d",
instance->fw_support_ieee);
if (instance->fw_support_ieee)
instance->flag_ieee = 1;
return 0;
fail_fw_init:
pci_free_consistent(instance->pdev, reply_q_sz,
instance->reply_queue, instance->reply_queue_h);
fail_reply_queue:
megasas_free_cmds(instance);
fail_alloc_cmds:
return 1;
}
/**
* megasas_init_fw - Initializes the FW
* @instance: Adapter soft state
*
* This is the main function for initializing firmware
*/
static int megasas_init_fw(struct megasas_instance *instance)
{
u32 max_sectors_1;
u32 max_sectors_2;
u32 tmp_sectors, msix_enable;
struct megasas_register_set __iomem *reg_set;
struct megasas_ctrl_info *ctrl_info;
unsigned long bar_list;
int i;
/* Find first memory bar */
bar_list = pci_select_bars(instance->pdev, IORESOURCE_MEM);
instance->bar = find_first_bit(&bar_list, sizeof(unsigned long));
instance->base_addr = pci_resource_start(instance->pdev, instance->bar);
if (pci_request_selected_regions(instance->pdev, instance->bar,
"megasas: LSI")) {
printk(KERN_DEBUG "megasas: IO memory region busy!\n");
return -EBUSY;
}
instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
if (!instance->reg_set) {
printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
goto fail_ioremap;
}
reg_set = instance->reg_set;
switch (instance->pdev->device) {
case PCI_DEVICE_ID_LSI_FUSION:
case PCI_DEVICE_ID_LSI_INVADER:
instance->instancet = &megasas_instance_template_fusion;
break;
case PCI_DEVICE_ID_LSI_SAS1078R:
case PCI_DEVICE_ID_LSI_SAS1078DE:
instance->instancet = &megasas_instance_template_ppc;
break;
case PCI_DEVICE_ID_LSI_SAS1078GEN2:
case PCI_DEVICE_ID_LSI_SAS0079GEN2:
instance->instancet = &megasas_instance_template_gen2;
break;
case PCI_DEVICE_ID_LSI_SAS0073SKINNY:
case PCI_DEVICE_ID_LSI_SAS0071SKINNY:
instance->instancet = &megasas_instance_template_skinny;
break;
case PCI_DEVICE_ID_LSI_SAS1064R:
case PCI_DEVICE_ID_DELL_PERC5:
default:
instance->instancet = &megasas_instance_template_xscale;
break;
}
/*
* We expect the FW state to be READY
*/
if (megasas_transition_to_ready(instance, 0))
goto fail_ready_state;
/* Check if MSI-X is supported while in ready state */
msix_enable = (instance->instancet->read_fw_status_reg(reg_set) &
0x4000000) >> 0x1a;
if (msix_enable && !msix_disable) {
/* Check max MSI-X vectors */
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)) {
instance->msix_vectors = (readl(&instance->reg_set->
outbound_scratch_pad_2
) & 0x1F) + 1;
if (msix_vectors)
instance->msix_vectors =
min(msix_vectors,
instance->msix_vectors);
} else
instance->msix_vectors = 1;
/* Don't bother allocating more MSI-X vectors than cpus */
instance->msix_vectors = min(instance->msix_vectors,
(unsigned int)num_online_cpus());
for (i = 0; i < instance->msix_vectors; i++)
instance->msixentry[i].entry = i;
i = pci_enable_msix(instance->pdev, instance->msixentry,
instance->msix_vectors);
if (i >= 0) {
if (i) {
if (!pci_enable_msix(instance->pdev,
instance->msixentry, i))
instance->msix_vectors = i;
else
instance->msix_vectors = 0;
}
} else
instance->msix_vectors = 0;
}
/* Get operational params, sge flags, send init cmd to controller */
if (instance->instancet->init_adapter(instance))
goto fail_init_adapter;
printk(KERN_ERR "megasas: INIT adapter done\n");
/** for passthrough
* the following function will get the PD LIST.
*/
memset(instance->pd_list, 0 ,
(MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)));
megasas_get_pd_list(instance);
memset(instance->ld_ids, 0xff, MEGASAS_MAX_LD_IDS);
megasas_get_ld_list(instance);
ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
/*
* Compute the max allowed sectors per IO: The controller info has two
* limits on max sectors. Driver should use the minimum of these two.
*
* 1 << stripe_sz_ops.min = max sectors per strip
*
* Note that older firmwares ( < FW ver 30) didn't report information
* to calculate max_sectors_1. So the number ended up as zero always.
*/
tmp_sectors = 0;
if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
ctrl_info->max_strips_per_io;
max_sectors_2 = ctrl_info->max_request_size;
tmp_sectors = min_t(u32, max_sectors_1 , max_sectors_2);
instance->disableOnlineCtrlReset =
ctrl_info->properties.OnOffProperties.disableOnlineCtrlReset;
}
instance->max_sectors_per_req = instance->max_num_sge *
PAGE_SIZE / 512;
if (tmp_sectors && (instance->max_sectors_per_req > tmp_sectors))
instance->max_sectors_per_req = tmp_sectors;
kfree(ctrl_info);
/* Check for valid throttlequeuedepth module parameter */
if (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY ||
instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) {
if (throttlequeuedepth > (instance->max_fw_cmds -
MEGASAS_SKINNY_INT_CMDS))
instance->throttlequeuedepth =
MEGASAS_THROTTLE_QUEUE_DEPTH;
else
instance->throttlequeuedepth = throttlequeuedepth;
} else {
if (throttlequeuedepth > (instance->max_fw_cmds -
MEGASAS_INT_CMDS))
instance->throttlequeuedepth =
MEGASAS_THROTTLE_QUEUE_DEPTH;
else
instance->throttlequeuedepth = throttlequeuedepth;
}
/*
* Setup tasklet for cmd completion
*/
tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
(unsigned long)instance);
return 0;
fail_init_adapter:
fail_ready_state:
iounmap(instance->reg_set);
fail_ioremap:
pci_release_selected_regions(instance->pdev, instance->bar);
return -EINVAL;
}
/**
* megasas_release_mfi - Reverses the FW initialization
* @intance: Adapter soft state
*/
static void megasas_release_mfi(struct megasas_instance *instance)
{
u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
if (instance->reply_queue)
pci_free_consistent(instance->pdev, reply_q_sz,
instance->reply_queue, instance->reply_queue_h);
megasas_free_cmds(instance);
iounmap(instance->reg_set);
pci_release_selected_regions(instance->pdev, instance->bar);
}
/**
* megasas_get_seq_num - Gets latest event sequence numbers
* @instance: Adapter soft state
* @eli: FW event log sequence numbers information
*
* FW maintains a log of all events in a non-volatile area. Upper layers would
* usually find out the latest sequence number of the events, the seq number at
* the boot etc. They would "read" all the events below the latest seq number
* by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
* number), they would subsribe to AEN (asynchronous event notification) and
* wait for the events to happen.
*/
static int
megasas_get_seq_num(struct megasas_instance *instance,
struct megasas_evt_log_info *eli)
{
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
struct megasas_evt_log_info *el_info;
dma_addr_t el_info_h = 0;
cmd = megasas_get_cmd(instance);
if (!cmd) {
return -ENOMEM;
}
dcmd = &cmd->frame->dcmd;
el_info = pci_alloc_consistent(instance->pdev,
sizeof(struct megasas_evt_log_info),
&el_info_h);
if (!el_info) {
megasas_return_cmd(instance, cmd);
return -ENOMEM;
}
memset(el_info, 0, sizeof(*el_info));
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0x0;
dcmd->sge_count = 1;
dcmd->flags = MFI_FRAME_DIR_READ;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
dcmd->sgl.sge32[0].phys_addr = el_info_h;
dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
megasas_issue_blocked_cmd(instance, cmd);
/*
* Copy the data back into callers buffer
*/
memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
el_info, el_info_h);
megasas_return_cmd(instance, cmd);
return 0;
}
/**
* megasas_register_aen - Registers for asynchronous event notification
* @instance: Adapter soft state
* @seq_num: The starting sequence number
* @class_locale: Class of the event
*
* This function subscribes for AEN for events beyond the @seq_num. It requests
* to be notified if and only if the event is of type @class_locale
*/
static int
megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
u32 class_locale_word)
{
int ret_val;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
union megasas_evt_class_locale curr_aen;
union megasas_evt_class_locale prev_aen;
/*
* If there an AEN pending already (aen_cmd), check if the
* class_locale of that pending AEN is inclusive of the new
* AEN request we currently have. If it is, then we don't have
* to do anything. In other words, whichever events the current
* AEN request is subscribing to, have already been subscribed
* to.
*
* If the old_cmd is _not_ inclusive, then we have to abort
* that command, form a class_locale that is superset of both
* old and current and re-issue to the FW
*/
curr_aen.word = class_locale_word;
if (instance->aen_cmd) {
prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
/*
* A class whose enum value is smaller is inclusive of all
* higher values. If a PROGRESS (= -1) was previously
* registered, then a new registration requests for higher
* classes need not be sent to FW. They are automatically
* included.
*
* Locale numbers don't have such hierarchy. They are bitmap
* values
*/
if ((prev_aen.members.class <= curr_aen.members.class) &&
!((prev_aen.members.locale & curr_aen.members.locale) ^
curr_aen.members.locale)) {
/*
* Previously issued event registration includes
* current request. Nothing to do.
*/
return 0;
} else {
curr_aen.members.locale |= prev_aen.members.locale;
if (prev_aen.members.class < curr_aen.members.class)
curr_aen.members.class = prev_aen.members.class;
instance->aen_cmd->abort_aen = 1;
ret_val = megasas_issue_blocked_abort_cmd(instance,
instance->
aen_cmd);
if (ret_val) {
printk(KERN_DEBUG "megasas: Failed to abort "
"previous AEN command\n");
return ret_val;
}
}
}
cmd = megasas_get_cmd(instance);
if (!cmd)
return -ENOMEM;
dcmd = &cmd->frame->dcmd;
memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
/*
* Prepare DCMD for aen registration
*/
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0x0;
dcmd->sge_count = 1;
dcmd->flags = MFI_FRAME_DIR_READ;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
instance->last_seq_num = seq_num;
dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
dcmd->mbox.w[0] = seq_num;
dcmd->mbox.w[1] = curr_aen.word;
dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
if (instance->aen_cmd != NULL) {
megasas_return_cmd(instance, cmd);
return 0;
}
/*
* Store reference to the cmd used to register for AEN. When an
* application wants us to register for AEN, we have to abort this
* cmd and re-register with a new EVENT LOCALE supplied by that app
*/
instance->aen_cmd = cmd;
/*
* Issue the aen registration frame
*/
instance->instancet->issue_dcmd(instance, cmd);
return 0;
}
/**
* megasas_start_aen - Subscribes to AEN during driver load time
* @instance: Adapter soft state
*/
static int megasas_start_aen(struct megasas_instance *instance)
{
struct megasas_evt_log_info eli;
union megasas_evt_class_locale class_locale;
/*
* Get the latest sequence number from FW
*/
memset(&eli, 0, sizeof(eli));
if (megasas_get_seq_num(instance, &eli))
return -1;
/*
* Register AEN with FW for latest sequence number plus 1
*/
class_locale.members.reserved = 0;
class_locale.members.locale = MR_EVT_LOCALE_ALL;
class_locale.members.class = MR_EVT_CLASS_DEBUG;
return megasas_register_aen(instance, eli.newest_seq_num + 1,
class_locale.word);
}
/**
* megasas_io_attach - Attaches this driver to SCSI mid-layer
* @instance: Adapter soft state
*/
static int megasas_io_attach(struct megasas_instance *instance)
{
struct Scsi_Host *host = instance->host;
/*
* Export parameters required by SCSI mid-layer
*/
host->irq = instance->pdev->irq;
host->unique_id = instance->unique_id;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
host->can_queue =
instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
} else
host->can_queue =
instance->max_fw_cmds - MEGASAS_INT_CMDS;
host->this_id = instance->init_id;
host->sg_tablesize = instance->max_num_sge;
if (instance->fw_support_ieee)
instance->max_sectors_per_req = MEGASAS_MAX_SECTORS_IEEE;
/*
* Check if the module parameter value for max_sectors can be used
*/
if (max_sectors && max_sectors < instance->max_sectors_per_req)
instance->max_sectors_per_req = max_sectors;
else {
if (max_sectors) {
if (((instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS1078GEN2) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_SAS0079GEN2)) &&
(max_sectors <= MEGASAS_MAX_SECTORS)) {
instance->max_sectors_per_req = max_sectors;
} else {
printk(KERN_INFO "megasas: max_sectors should be > 0"
"and <= %d (or < 1MB for GEN2 controller)\n",
instance->max_sectors_per_req);
}
}
}
host->max_sectors = instance->max_sectors_per_req;
host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
host->max_channel = MEGASAS_MAX_CHANNELS - 1;
host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
host->max_lun = MEGASAS_MAX_LUN;
host->max_cmd_len = 16;
/* Fusion only supports host reset */
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER)) {
host->hostt->eh_device_reset_handler = NULL;
host->hostt->eh_bus_reset_handler = NULL;
}
/*
* Notify the mid-layer about the new controller
*/
if (scsi_add_host(host, &instance->pdev->dev)) {
printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
return -ENODEV;
}
/*
* Trigger SCSI to scan our drives
*/
scsi_scan_host(host);
return 0;
}
static int
megasas_set_dma_mask(struct pci_dev *pdev)
{
/*
* All our contollers are capable of performing 64-bit DMA
*/
if (IS_DMA64) {
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) {
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
goto fail_set_dma_mask;
}
} else {
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0)
goto fail_set_dma_mask;
}
return 0;
fail_set_dma_mask:
return 1;
}
/**
* megasas_probe_one - PCI hotplug entry point
* @pdev: PCI device structure
* @id: PCI ids of supported hotplugged adapter
*/
static int __devinit
megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
int rval, pos, i, j;
struct Scsi_Host *host;
struct megasas_instance *instance;
u16 control = 0;
/* Reset MSI-X in the kdump kernel */
if (reset_devices) {
pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
if (pos) {
pci_read_config_word(pdev, msi_control_reg(pos),
&control);
if (control & PCI_MSIX_FLAGS_ENABLE) {
dev_info(&pdev->dev, "resetting MSI-X\n");
pci_write_config_word(pdev,
msi_control_reg(pos),
control &
~PCI_MSIX_FLAGS_ENABLE);
}
}
}
/*
* Announce PCI information
*/
printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
pdev->vendor, pdev->device, pdev->subsystem_vendor,
pdev->subsystem_device);
printk("bus %d:slot %d:func %d\n",
pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
/*
* PCI prepping: enable device set bus mastering and dma mask
*/
rval = pci_enable_device_mem(pdev);
if (rval) {
return rval;
}
pci_set_master(pdev);
if (megasas_set_dma_mask(pdev))
goto fail_set_dma_mask;
host = scsi_host_alloc(&megasas_template,
sizeof(struct megasas_instance));
if (!host) {
printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
goto fail_alloc_instance;
}
instance = (struct megasas_instance *)host->hostdata;
memset(instance, 0, sizeof(*instance));
atomic_set( &instance->fw_reset_no_pci_access, 0 );
instance->pdev = pdev;
switch (instance->pdev->device) {
case PCI_DEVICE_ID_LSI_FUSION:
case PCI_DEVICE_ID_LSI_INVADER:
{
struct fusion_context *fusion;
instance->ctrl_context =
kzalloc(sizeof(struct fusion_context), GFP_KERNEL);
if (!instance->ctrl_context) {
printk(KERN_DEBUG "megasas: Failed to allocate "
"memory for Fusion context info\n");
goto fail_alloc_dma_buf;
}
fusion = instance->ctrl_context;
INIT_LIST_HEAD(&fusion->cmd_pool);
spin_lock_init(&fusion->cmd_pool_lock);
}
break;
default: /* For all other supported controllers */
instance->producer =
pci_alloc_consistent(pdev, sizeof(u32),
&instance->producer_h);
instance->consumer =
pci_alloc_consistent(pdev, sizeof(u32),
&instance->consumer_h);
if (!instance->producer || !instance->consumer) {
printk(KERN_DEBUG "megasas: Failed to allocate"
"memory for producer, consumer\n");
goto fail_alloc_dma_buf;
}
*instance->producer = 0;
*instance->consumer = 0;
break;
}
megasas_poll_wait_aen = 0;
instance->flag_ieee = 0;
instance->ev = NULL;
instance->issuepend_done = 1;
instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
megasas_poll_wait_aen = 0;
instance->evt_detail = pci_alloc_consistent(pdev,
sizeof(struct
megasas_evt_detail),
&instance->evt_detail_h);
if (!instance->evt_detail) {
printk(KERN_DEBUG "megasas: Failed to allocate memory for "
"event detail structure\n");
goto fail_alloc_dma_buf;
}
/*
* Initialize locks and queues
*/
INIT_LIST_HEAD(&instance->cmd_pool);
INIT_LIST_HEAD(&instance->internal_reset_pending_q);
atomic_set(&instance->fw_outstanding,0);
init_waitqueue_head(&instance->int_cmd_wait_q);
init_waitqueue_head(&instance->abort_cmd_wait_q);
spin_lock_init(&instance->cmd_pool_lock);
spin_lock_init(&instance->hba_lock);
spin_lock_init(&instance->completion_lock);
mutex_init(&instance->aen_mutex);
mutex_init(&instance->reset_mutex);
/*
* Initialize PCI related and misc parameters
*/
instance->host = host;
instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
instance->init_id = MEGASAS_DEFAULT_INIT_ID;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
instance->flag_ieee = 1;
sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
} else
sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
megasas_dbg_lvl = 0;
instance->flag = 0;
instance->unload = 1;
instance->last_time = 0;
instance->disableOnlineCtrlReset = 1;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER))
INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
else
INIT_WORK(&instance->work_init, process_fw_state_change_wq);
/*
* Initialize MFI Firmware
*/
if (megasas_init_fw(instance))
goto fail_init_mfi;
/*
* Register IRQ
*/
if (instance->msix_vectors) {
for (i = 0 ; i < instance->msix_vectors; i++) {
instance->irq_context[i].instance = instance;
instance->irq_context[i].MSIxIndex = i;
if (request_irq(instance->msixentry[i].vector,
instance->instancet->service_isr, 0,
"megasas",
&instance->irq_context[i])) {
printk(KERN_DEBUG "megasas: Failed to "
"register IRQ for vector %d.\n", i);
for (j = 0 ; j < i ; j++)
free_irq(
instance->msixentry[j].vector,
&instance->irq_context[j]);
goto fail_irq;
}
}
} else {
instance->irq_context[0].instance = instance;
instance->irq_context[0].MSIxIndex = 0;
if (request_irq(pdev->irq, instance->instancet->service_isr,
IRQF_SHARED, "megasas",
&instance->irq_context[0])) {
printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
goto fail_irq;
}
}
instance->instancet->enable_intr(instance->reg_set);
/*
* Store instance in PCI softstate
*/
pci_set_drvdata(pdev, instance);
/*
* Add this controller to megasas_mgmt_info structure so that it
* can be exported to management applications
*/
megasas_mgmt_info.count++;
megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
megasas_mgmt_info.max_index++;
/*
* Register with SCSI mid-layer
*/
if (megasas_io_attach(instance))
goto fail_io_attach;
instance->unload = 0;
/*
* Initiate AEN (Asynchronous Event Notification)
*/
if (megasas_start_aen(instance)) {
printk(KERN_DEBUG "megasas: start aen failed\n");
goto fail_start_aen;
}
return 0;
fail_start_aen:
fail_io_attach:
megasas_mgmt_info.count--;
megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
megasas_mgmt_info.max_index--;
pci_set_drvdata(pdev, NULL);
instance->instancet->disable_intr(instance->reg_set);
if (instance->msix_vectors)
for (i = 0 ; i < instance->msix_vectors; i++)
free_irq(instance->msixentry[i].vector,
&instance->irq_context[i]);
else
free_irq(instance->pdev->irq, &instance->irq_context[0]);
fail_irq:
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER))
megasas_release_fusion(instance);
else
megasas_release_mfi(instance);
fail_init_mfi:
if (instance->msix_vectors)
pci_disable_msix(instance->pdev);
fail_alloc_dma_buf:
if (instance->evt_detail)
pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
instance->evt_detail,
instance->evt_detail_h);
if (instance->producer)
pci_free_consistent(pdev, sizeof(u32), instance->producer,
instance->producer_h);
if (instance->consumer)
pci_free_consistent(pdev, sizeof(u32), instance->consumer,
instance->consumer_h);
scsi_host_put(host);
fail_alloc_instance:
fail_set_dma_mask:
pci_disable_device(pdev);
return -ENODEV;
}
/**
* megasas_flush_cache - Requests FW to flush all its caches
* @instance: Adapter soft state
*/
static void megasas_flush_cache(struct megasas_instance *instance)
{
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
return;
cmd = megasas_get_cmd(instance);
if (!cmd)
return;
dcmd = &cmd->frame->dcmd;
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0x0;
dcmd->sge_count = 0;
dcmd->flags = MFI_FRAME_DIR_NONE;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = 0;
dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
megasas_issue_blocked_cmd(instance, cmd);
megasas_return_cmd(instance, cmd);
return;
}
/**
* megasas_shutdown_controller - Instructs FW to shutdown the controller
* @instance: Adapter soft state
* @opcode: Shutdown/Hibernate
*/
static void megasas_shutdown_controller(struct megasas_instance *instance,
u32 opcode)
{
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
return;
cmd = megasas_get_cmd(instance);
if (!cmd)
return;
if (instance->aen_cmd)
megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
if (instance->map_update_cmd)
megasas_issue_blocked_abort_cmd(instance,
instance->map_update_cmd);
dcmd = &cmd->frame->dcmd;
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0x0;
dcmd->sge_count = 0;
dcmd->flags = MFI_FRAME_DIR_NONE;
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = 0;
dcmd->opcode = opcode;
megasas_issue_blocked_cmd(instance, cmd);
megasas_return_cmd(instance, cmd);
return;
}
#ifdef CONFIG_PM
/**
* megasas_suspend - driver suspend entry point
* @pdev: PCI device structure
* @state: PCI power state to suspend routine
*/
static int
megasas_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct Scsi_Host *host;
struct megasas_instance *instance;
int i;
instance = pci_get_drvdata(pdev);
host = instance->host;
instance->unload = 1;
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
/* cancel the delayed work if this work still in queue */
if (instance->ev != NULL) {
struct megasas_aen_event *ev = instance->ev;
cancel_delayed_work_sync(
(struct delayed_work *)&ev->hotplug_work);
instance->ev = NULL;
}
tasklet_kill(&instance->isr_tasklet);
pci_set_drvdata(instance->pdev, instance);
instance->instancet->disable_intr(instance->reg_set);
if (instance->msix_vectors)
for (i = 0 ; i < instance->msix_vectors; i++)
free_irq(instance->msixentry[i].vector,
&instance->irq_context[i]);
else
free_irq(instance->pdev->irq, &instance->irq_context[0]);
if (instance->msix_vectors)
pci_disable_msix(instance->pdev);
pci_save_state(pdev);
pci_disable_device(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
/**
* megasas_resume- driver resume entry point
* @pdev: PCI device structure
*/
static int
megasas_resume(struct pci_dev *pdev)
{
int rval, i, j;
struct Scsi_Host *host;
struct megasas_instance *instance;
instance = pci_get_drvdata(pdev);
host = instance->host;
pci_set_power_state(pdev, PCI_D0);
pci_enable_wake(pdev, PCI_D0, 0);
pci_restore_state(pdev);
/*
* PCI prepping: enable device set bus mastering and dma mask
*/
rval = pci_enable_device_mem(pdev);
if (rval) {
printk(KERN_ERR "megasas: Enable device failed\n");
return rval;
}
pci_set_master(pdev);
if (megasas_set_dma_mask(pdev))
goto fail_set_dma_mask;
/*
* Initialize MFI Firmware
*/
atomic_set(&instance->fw_outstanding, 0);
/*
* We expect the FW state to be READY
*/
if (megasas_transition_to_ready(instance, 0))
goto fail_ready_state;
/* Now re-enable MSI-X */
if (instance->msix_vectors)
pci_enable_msix(instance->pdev, instance->msixentry,
instance->msix_vectors);
switch (instance->pdev->device) {
case PCI_DEVICE_ID_LSI_FUSION:
case PCI_DEVICE_ID_LSI_INVADER:
{
megasas_reset_reply_desc(instance);
if (megasas_ioc_init_fusion(instance)) {
megasas_free_cmds(instance);
megasas_free_cmds_fusion(instance);
goto fail_init_mfi;
}
if (!megasas_get_map_info(instance))
megasas_sync_map_info(instance);
}
break;
default:
*instance->producer = 0;
*instance->consumer = 0;
if (megasas_issue_init_mfi(instance))
goto fail_init_mfi;
break;
}
tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
(unsigned long)instance);
/*
* Register IRQ
*/
if (instance->msix_vectors) {
for (i = 0 ; i < instance->msix_vectors; i++) {
instance->irq_context[i].instance = instance;
instance->irq_context[i].MSIxIndex = i;
if (request_irq(instance->msixentry[i].vector,
instance->instancet->service_isr, 0,
"megasas",
&instance->irq_context[i])) {
printk(KERN_DEBUG "megasas: Failed to "
"register IRQ for vector %d.\n", i);
for (j = 0 ; j < i ; j++)
free_irq(
instance->msixentry[j].vector,
&instance->irq_context[j]);
goto fail_irq;
}
}
} else {
instance->irq_context[0].instance = instance;
instance->irq_context[0].MSIxIndex = 0;
if (request_irq(pdev->irq, instance->instancet->service_isr,
IRQF_SHARED, "megasas",
&instance->irq_context[0])) {
printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
goto fail_irq;
}
}
instance->instancet->enable_intr(instance->reg_set);
instance->unload = 0;
/*
* Initiate AEN (Asynchronous Event Notification)
*/
if (megasas_start_aen(instance))
printk(KERN_ERR "megasas: Start AEN failed\n");
return 0;
fail_irq:
fail_init_mfi:
if (instance->evt_detail)
pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
instance->evt_detail,
instance->evt_detail_h);
if (instance->producer)
pci_free_consistent(pdev, sizeof(u32), instance->producer,
instance->producer_h);
if (instance->consumer)
pci_free_consistent(pdev, sizeof(u32), instance->consumer,
instance->consumer_h);
scsi_host_put(host);
fail_set_dma_mask:
fail_ready_state:
pci_disable_device(pdev);
return -ENODEV;
}
#else
#define megasas_suspend NULL
#define megasas_resume NULL
#endif
/**
* megasas_detach_one - PCI hot"un"plug entry point
* @pdev: PCI device structure
*/
static void __devexit megasas_detach_one(struct pci_dev *pdev)
{
int i;
struct Scsi_Host *host;
struct megasas_instance *instance;
struct fusion_context *fusion;
instance = pci_get_drvdata(pdev);
instance->unload = 1;
host = instance->host;
fusion = instance->ctrl_context;
scsi_remove_host(instance->host);
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
/* cancel the delayed work if this work still in queue*/
if (instance->ev != NULL) {
struct megasas_aen_event *ev = instance->ev;
cancel_delayed_work_sync(
(struct delayed_work *)&ev->hotplug_work);
instance->ev = NULL;
}
tasklet_kill(&instance->isr_tasklet);
/*
* Take the instance off the instance array. Note that we will not
* decrement the max_index. We let this array be sparse array
*/
for (i = 0; i < megasas_mgmt_info.max_index; i++) {
if (megasas_mgmt_info.instance[i] == instance) {
megasas_mgmt_info.count--;
megasas_mgmt_info.instance[i] = NULL;
break;
}
}
pci_set_drvdata(instance->pdev, NULL);
instance->instancet->disable_intr(instance->reg_set);
if (instance->msix_vectors)
for (i = 0 ; i < instance->msix_vectors; i++)
free_irq(instance->msixentry[i].vector,
&instance->irq_context[i]);
else
free_irq(instance->pdev->irq, &instance->irq_context[0]);
if (instance->msix_vectors)
pci_disable_msix(instance->pdev);
switch (instance->pdev->device) {
case PCI_DEVICE_ID_LSI_FUSION:
case PCI_DEVICE_ID_LSI_INVADER:
megasas_release_fusion(instance);
for (i = 0; i < 2 ; i++)
if (fusion->ld_map[i])
dma_free_coherent(&instance->pdev->dev,
fusion->map_sz,
fusion->ld_map[i],
fusion->
ld_map_phys[i]);
kfree(instance->ctrl_context);
break;
default:
megasas_release_mfi(instance);
pci_free_consistent(pdev,
sizeof(struct megasas_evt_detail),
instance->evt_detail,
instance->evt_detail_h);
pci_free_consistent(pdev, sizeof(u32),
instance->producer,
instance->producer_h);
pci_free_consistent(pdev, sizeof(u32),
instance->consumer,
instance->consumer_h);
break;
}
scsi_host_put(host);
pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
return;
}
/**
* megasas_shutdown - Shutdown entry point
* @device: Generic device structure
*/
static void megasas_shutdown(struct pci_dev *pdev)
{
int i;
struct megasas_instance *instance = pci_get_drvdata(pdev);
instance->unload = 1;
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
instance->instancet->disable_intr(instance->reg_set);
if (instance->msix_vectors)
for (i = 0 ; i < instance->msix_vectors; i++)
free_irq(instance->msixentry[i].vector,
&instance->irq_context[i]);
else
free_irq(instance->pdev->irq, &instance->irq_context[0]);
if (instance->msix_vectors)
pci_disable_msix(instance->pdev);
}
/**
* megasas_mgmt_open - char node "open" entry point
*/
static int megasas_mgmt_open(struct inode *inode, struct file *filep)
{
/*
* Allow only those users with admin rights
*/
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
return 0;
}
/**
* megasas_mgmt_fasync - Async notifier registration from applications
*
* This function adds the calling process to a driver global queue. When an
* event occurs, SIGIO will be sent to all processes in this queue.
*/
static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
{
int rc;
mutex_lock(&megasas_async_queue_mutex);
rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
mutex_unlock(&megasas_async_queue_mutex);
if (rc >= 0) {
/* For sanity check when we get ioctl */
filep->private_data = filep;
return 0;
}
printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
return rc;
}
/**
* megasas_mgmt_poll - char node "poll" entry point
* */
static unsigned int megasas_mgmt_poll(struct file *file, poll_table *wait)
{
unsigned int mask;
unsigned long flags;
poll_wait(file, &megasas_poll_wait, wait);
spin_lock_irqsave(&poll_aen_lock, flags);
if (megasas_poll_wait_aen)
mask = (POLLIN | POLLRDNORM);
else
mask = 0;
spin_unlock_irqrestore(&poll_aen_lock, flags);
return mask;
}
/**
* megasas_mgmt_fw_ioctl - Issues management ioctls to FW
* @instance: Adapter soft state
* @argp: User's ioctl packet
*/
static int
megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
struct megasas_iocpacket __user * user_ioc,
struct megasas_iocpacket *ioc)
{
struct megasas_sge32 *kern_sge32;
struct megasas_cmd *cmd;
void *kbuff_arr[MAX_IOCTL_SGE];
dma_addr_t buf_handle = 0;
int error = 0, i;
void *sense = NULL;
dma_addr_t sense_handle;
unsigned long *sense_ptr;
memset(kbuff_arr, 0, sizeof(kbuff_arr));
if (ioc->sge_count > MAX_IOCTL_SGE) {
printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
ioc->sge_count, MAX_IOCTL_SGE);
return -EINVAL;
}
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
return -ENOMEM;
}
/*
* User's IOCTL packet has 2 frames (maximum). Copy those two
* frames into our cmd's frames. cmd->frame's context will get
* overwritten when we copy from user's frames. So set that value
* alone separately
*/
memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
cmd->frame->hdr.context = cmd->index;
cmd->frame->hdr.pad_0 = 0;
cmd->frame->hdr.flags &= ~(MFI_FRAME_IEEE | MFI_FRAME_SGL64 |
MFI_FRAME_SENSE64);
/*
* The management interface between applications and the fw uses
* MFI frames. E.g, RAID configuration changes, LD property changes
* etc are accomplishes through different kinds of MFI frames. The
* driver needs to care only about substituting user buffers with
* kernel buffers in SGLs. The location of SGL is embedded in the
* struct iocpacket itself.
*/
kern_sge32 = (struct megasas_sge32 *)
((unsigned long)cmd->frame + ioc->sgl_off);
/*
* For each user buffer, create a mirror buffer and copy in
*/
for (i = 0; i < ioc->sge_count; i++) {
[SCSI] megaraid_sas: Sanity check user supplied length before passing it to dma_alloc_coherent() The ioc->sgl[i].iov_len value is supplied by the ioctl caller, and can be zero in some cases. Assume that's valid and continue without error. Fixes (multiple individual reports of the same problem for quite a while): http://marc.info/?l=linux-ide&m=128941801715301 http://bugs.debian.org/604627 http://www.mail-archive.com/linux-poweredge@dell.com/msg02575.html megasas: Failed to alloc kernel SGL buffer for IOCTL and [ 69.162538] ------------[ cut here ]------------ [ 69.162806] kernel BUG at /build/buildd/linux-2.6.32/lib/swiotlb.c:368! [ 69.163134] invalid opcode: 0000 [#1] SMP [ 69.163570] last sysfs file: /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map [ 69.163975] CPU 0 [ 69.164227] Modules linked in: fbcon tileblit font bitblit softcursor vga16fb vgastate ioatdma radeon ttm drm_kms_helper shpchp drm i2c_algo_bit lp parport floppy pata_jmicron megaraid_sas igb dca [ 69.167419] Pid: 1206, comm: smartctl Tainted: G W 2.6.32-25-server #45-Ubuntu X8DTN [ 69.167843] RIP: 0010:[<ffffffff812c4dc5>] [<ffffffff812c4dc5>] map_single+0x255/0x260 [ 69.168370] RSP: 0018:ffff88081c0ebc58 EFLAGS: 00010246 [ 69.168655] RAX: 000000000003bffc RBX: 00000000ffffffff RCX: 0000000000000002 [ 69.169000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88001dffe000 [ 69.169346] RBP: ffff88081c0ebcb8 R08: 0000000000000000 R09: ffff880000030840 [ 69.169691] R10: 0000000000100000 R11: 0000000000000000 R12: 0000000000000000 [ 69.170036] R13: 00000000ffffffff R14: 0000000000000001 R15: 0000000000200000 [ 69.170382] FS: 00007fb8de189720(0000) GS:ffff88001de00000(0000) knlGS:0000000000000000 [ 69.170794] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.171094] CR2: 00007fb8dd59237c CR3: 000000081a790000 CR4: 00000000000006f0 [ 69.171439] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.171784] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 69.172130] Process smartctl (pid: 1206, threadinfo ffff88081c0ea000, task ffff88081a760000) [ 69.194513] Stack: [ 69.205788] 0000000000000034 00000002817e3390 0000000000000000 ffff88081c0ebe00 [ 69.217739] <0> 0000000000000000 000000000003bffc 0000000000000000 0000000000000000 [ 69.241250] <0> 0000000000000000 00000000ffffffff ffff88081c5b4080 ffff88081c0ebe00 [ 69.277310] Call Trace: [ 69.289278] [<ffffffff812c52ac>] swiotlb_alloc_coherent+0xec/0x130 [ 69.301118] [<ffffffff81038b31>] x86_swiotlb_alloc_coherent+0x61/0x70 [ 69.313045] [<ffffffffa002d0ce>] megasas_mgmt_fw_ioctl+0x1ae/0x690 [megaraid_sas] [ 69.336399] [<ffffffffa002d748>] megasas_mgmt_ioctl_fw+0x198/0x240 [megaraid_sas] [ 69.359346] [<ffffffffa002f695>] megasas_mgmt_ioctl+0x35/0x50 [megaraid_sas] [ 69.370902] [<ffffffff81153b12>] vfs_ioctl+0x22/0xa0 [ 69.382322] [<ffffffff8115da2a>] ? alloc_fd+0x10a/0x150 [ 69.393622] [<ffffffff81153cb1>] do_vfs_ioctl+0x81/0x410 [ 69.404696] [<ffffffff8155cc13>] ? do_page_fault+0x153/0x3b0 [ 69.415761] [<ffffffff811540c1>] sys_ioctl+0x81/0xa0 [ 69.426640] [<ffffffff810121b2>] system_call_fastpath+0x16/0x1b [ 69.437491] Code: fe ff ff 48 8b 3d 74 38 76 00 41 bf 00 00 20 00 e8 51 f5 d7 ff 83 e0 ff 48 05 ff 07 00 00 48 c1 e8 0b 48 89 45 c8 e9 13 fe ff ff <0f> 0b eb fe 0f 1f 80 00 00 00 00 55 48 89 e5 48 83 ec 20 4c 89 [ 69.478216] RIP [<ffffffff812c4dc5>] map_single+0x255/0x260 [ 69.489668] RSP <ffff88081c0ebc58> [ 69.500975] ---[ end trace 6a2181b634e2abc7 ]--- Reported-by: Bokhan Artem <aptem@ngs.ru> Reported by: Marc-Christian Petersen <m.c.p@gmx.de> Signed-off-by: Bjørn Mork <bjorn@mork.no> Cc: "Benz, Michael" <Michael.Benz@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-01-19 09:01:14 +00:00
if (!ioc->sgl[i].iov_len)
continue;
kbuff_arr[i] = dma_alloc_coherent(&instance->pdev->dev,
ioc->sgl[i].iov_len,
&buf_handle, GFP_KERNEL);
if (!kbuff_arr[i]) {
printk(KERN_DEBUG "megasas: Failed to alloc "
"kernel SGL buffer for IOCTL \n");
error = -ENOMEM;
goto out;
}
/*
* We don't change the dma_coherent_mask, so
* pci_alloc_consistent only returns 32bit addresses
*/
kern_sge32[i].phys_addr = (u32) buf_handle;
kern_sge32[i].length = ioc->sgl[i].iov_len;
/*
* We created a kernel buffer corresponding to the
* user buffer. Now copy in from the user buffer
*/
if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
(u32) (ioc->sgl[i].iov_len))) {
error = -EFAULT;
goto out;
}
}
if (ioc->sense_len) {
sense = dma_alloc_coherent(&instance->pdev->dev, ioc->sense_len,
&sense_handle, GFP_KERNEL);
if (!sense) {
error = -ENOMEM;
goto out;
}
sense_ptr =
(unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
*sense_ptr = sense_handle;
}
/*
* Set the sync_cmd flag so that the ISR knows not to complete this
* cmd to the SCSI mid-layer
*/
cmd->sync_cmd = 1;
megasas_issue_blocked_cmd(instance, cmd);
cmd->sync_cmd = 0;
/*
* copy out the kernel buffers to user buffers
*/
for (i = 0; i < ioc->sge_count; i++) {
if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
ioc->sgl[i].iov_len)) {
error = -EFAULT;
goto out;
}
}
/*
* copy out the sense
*/
if (ioc->sense_len) {
/*
* sense_ptr points to the location that has the user
* sense buffer address
*/
sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
ioc->sense_off);
if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
sense, ioc->sense_len)) {
printk(KERN_ERR "megasas: Failed to copy out to user "
"sense data\n");
error = -EFAULT;
goto out;
}
}
/*
* copy the status codes returned by the fw
*/
if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
&cmd->frame->hdr.cmd_status, sizeof(u8))) {
printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
error = -EFAULT;
}
out:
if (sense) {
dma_free_coherent(&instance->pdev->dev, ioc->sense_len,
sense, sense_handle);
}
for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
dma_free_coherent(&instance->pdev->dev,
kern_sge32[i].length,
kbuff_arr[i], kern_sge32[i].phys_addr);
}
megasas_return_cmd(instance, cmd);
return error;
}
static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
{
struct megasas_iocpacket __user *user_ioc =
(struct megasas_iocpacket __user *)arg;
struct megasas_iocpacket *ioc;
struct megasas_instance *instance;
int error;
int i;
unsigned long flags;
u32 wait_time = MEGASAS_RESET_WAIT_TIME;
ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc)
return -ENOMEM;
if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
error = -EFAULT;
goto out_kfree_ioc;
}
instance = megasas_lookup_instance(ioc->host_no);
if (!instance) {
error = -ENODEV;
goto out_kfree_ioc;
}
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
printk(KERN_ERR "Controller in crit error\n");
error = -ENODEV;
goto out_kfree_ioc;
}
if (instance->unload == 1) {
error = -ENODEV;
goto out_kfree_ioc;
}
/*
* We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
*/
if (down_interruptible(&instance->ioctl_sem)) {
error = -ERESTARTSYS;
goto out_kfree_ioc;
}
for (i = 0; i < wait_time; i++) {
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
break;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
printk(KERN_NOTICE "megasas: waiting"
"for controller reset to finish\n");
}
msleep(1000);
}
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
printk(KERN_ERR "megaraid_sas: timed out while"
"waiting for HBA to recover\n");
error = -ENODEV;
goto out_kfree_ioc;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
up(&instance->ioctl_sem);
out_kfree_ioc:
kfree(ioc);
return error;
}
static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
{
struct megasas_instance *instance;
struct megasas_aen aen;
int error;
int i;
unsigned long flags;
u32 wait_time = MEGASAS_RESET_WAIT_TIME;
if (file->private_data != file) {
printk(KERN_DEBUG "megasas: fasync_helper was not "
"called first\n");
return -EINVAL;
}
if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
return -EFAULT;
instance = megasas_lookup_instance(aen.host_no);
if (!instance)
return -ENODEV;
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
return -ENODEV;
}
if (instance->unload == 1) {
return -ENODEV;
}
for (i = 0; i < wait_time; i++) {
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
spin_unlock_irqrestore(&instance->hba_lock,
flags);
break;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
printk(KERN_NOTICE "megasas: waiting for"
"controller reset to finish\n");
}
msleep(1000);
}
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery != MEGASAS_HBA_OPERATIONAL) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
printk(KERN_ERR "megaraid_sas: timed out while waiting"
"for HBA to recover.\n");
return -ENODEV;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
mutex_lock(&instance->aen_mutex);
error = megasas_register_aen(instance, aen.seq_num,
aen.class_locale_word);
mutex_unlock(&instance->aen_mutex);
return error;
}
/**
* megasas_mgmt_ioctl - char node ioctl entry point
*/
static long
megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case MEGASAS_IOC_FIRMWARE:
return megasas_mgmt_ioctl_fw(file, arg);
case MEGASAS_IOC_GET_AEN:
return megasas_mgmt_ioctl_aen(file, arg);
}
return -ENOTTY;
}
#ifdef CONFIG_COMPAT
static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
{
struct compat_megasas_iocpacket __user *cioc =
(struct compat_megasas_iocpacket __user *)arg;
struct megasas_iocpacket __user *ioc =
compat_alloc_user_space(sizeof(struct megasas_iocpacket));
int i;
int error = 0;
compat_uptr_t ptr;
if (clear_user(ioc, sizeof(*ioc)))
return -EFAULT;
if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
return -EFAULT;
/*
* The sense_ptr is used in megasas_mgmt_fw_ioctl only when
* sense_len is not null, so prepare the 64bit value under
* the same condition.
*/
if (ioc->sense_len) {
void __user **sense_ioc_ptr =
(void __user **)(ioc->frame.raw + ioc->sense_off);
compat_uptr_t *sense_cioc_ptr =
(compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
if (get_user(ptr, sense_cioc_ptr) ||
put_user(compat_ptr(ptr), sense_ioc_ptr))
return -EFAULT;
}
for (i = 0; i < MAX_IOCTL_SGE; i++) {
if (get_user(ptr, &cioc->sgl[i].iov_base) ||
put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
copy_in_user(&ioc->sgl[i].iov_len,
&cioc->sgl[i].iov_len, sizeof(compat_size_t)))
return -EFAULT;
}
error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
if (copy_in_user(&cioc->frame.hdr.cmd_status,
&ioc->frame.hdr.cmd_status, sizeof(u8))) {
printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
return -EFAULT;
}
return error;
}
static long
megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
switch (cmd) {
case MEGASAS_IOC_FIRMWARE32:
return megasas_mgmt_compat_ioctl_fw(file, arg);
case MEGASAS_IOC_GET_AEN:
return megasas_mgmt_ioctl_aen(file, arg);
}
return -ENOTTY;
}
#endif
/*
* File operations structure for management interface
*/
static const struct file_operations megasas_mgmt_fops = {
.owner = THIS_MODULE,
.open = megasas_mgmt_open,
.fasync = megasas_mgmt_fasync,
.unlocked_ioctl = megasas_mgmt_ioctl,
.poll = megasas_mgmt_poll,
#ifdef CONFIG_COMPAT
.compat_ioctl = megasas_mgmt_compat_ioctl,
#endif
llseek: automatically add .llseek fop All file_operations should get a .llseek operation so we can make nonseekable_open the default for future file operations without a .llseek pointer. The three cases that we can automatically detect are no_llseek, seq_lseek and default_llseek. For cases where we can we can automatically prove that the file offset is always ignored, we use noop_llseek, which maintains the current behavior of not returning an error from a seek. New drivers should normally not use noop_llseek but instead use no_llseek and call nonseekable_open at open time. Existing drivers can be converted to do the same when the maintainer knows for certain that no user code relies on calling seek on the device file. The generated code is often incorrectly indented and right now contains comments that clarify for each added line why a specific variant was chosen. In the version that gets submitted upstream, the comments will be gone and I will manually fix the indentation, because there does not seem to be a way to do that using coccinelle. Some amount of new code is currently sitting in linux-next that should get the same modifications, which I will do at the end of the merge window. Many thanks to Julia Lawall for helping me learn to write a semantic patch that does all this. ===== begin semantic patch ===== // This adds an llseek= method to all file operations, // as a preparation for making no_llseek the default. // // The rules are // - use no_llseek explicitly if we do nonseekable_open // - use seq_lseek for sequential files // - use default_llseek if we know we access f_pos // - use noop_llseek if we know we don't access f_pos, // but we still want to allow users to call lseek // @ open1 exists @ identifier nested_open; @@ nested_open(...) { <+... nonseekable_open(...) ...+> } @ open exists@ identifier open_f; identifier i, f; identifier open1.nested_open; @@ int open_f(struct inode *i, struct file *f) { <+... ( nonseekable_open(...) | nested_open(...) ) ...+> } @ read disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ read_no_fpos disable optional_qualifier exists @ identifier read_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off) { ... when != off } @ write @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; expression E; identifier func; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { <+... ( *off = E | *off += E | func(..., off, ...) | E = *off ) ...+> } @ write_no_fpos @ identifier write_f; identifier f, p, s, off; type ssize_t, size_t, loff_t; @@ ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off) { ... when != off } @ fops0 @ identifier fops; @@ struct file_operations fops = { ... }; @ has_llseek depends on fops0 @ identifier fops0.fops; identifier llseek_f; @@ struct file_operations fops = { ... .llseek = llseek_f, ... }; @ has_read depends on fops0 @ identifier fops0.fops; identifier read_f; @@ struct file_operations fops = { ... .read = read_f, ... }; @ has_write depends on fops0 @ identifier fops0.fops; identifier write_f; @@ struct file_operations fops = { ... .write = write_f, ... }; @ has_open depends on fops0 @ identifier fops0.fops; identifier open_f; @@ struct file_operations fops = { ... .open = open_f, ... }; // use no_llseek if we call nonseekable_open //////////////////////////////////////////// @ nonseekable1 depends on !has_llseek && has_open @ identifier fops0.fops; identifier nso ~= "nonseekable_open"; @@ struct file_operations fops = { ... .open = nso, ... +.llseek = no_llseek, /* nonseekable */ }; @ nonseekable2 depends on !has_llseek @ identifier fops0.fops; identifier open.open_f; @@ struct file_operations fops = { ... .open = open_f, ... +.llseek = no_llseek, /* open uses nonseekable */ }; // use seq_lseek for sequential files ///////////////////////////////////// @ seq depends on !has_llseek @ identifier fops0.fops; identifier sr ~= "seq_read"; @@ struct file_operations fops = { ... .read = sr, ... +.llseek = seq_lseek, /* we have seq_read */ }; // use default_llseek if there is a readdir /////////////////////////////////////////// @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier readdir_e; @@ // any other fop is used that changes pos struct file_operations fops = { ... .readdir = readdir_e, ... +.llseek = default_llseek, /* readdir is present */ }; // use default_llseek if at least one of read/write touches f_pos ///////////////////////////////////////////////////////////////// @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read.read_f; @@ // read fops use offset struct file_operations fops = { ... .read = read_f, ... +.llseek = default_llseek, /* read accesses f_pos */ }; @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, ... + .llseek = default_llseek, /* write accesses f_pos */ }; // Use noop_llseek if neither read nor write accesses f_pos /////////////////////////////////////////////////////////// @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; identifier write_no_fpos.write_f; @@ // write fops use offset struct file_operations fops = { ... .write = write_f, .read = read_f, ... +.llseek = noop_llseek, /* read and write both use no f_pos */ }; @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier write_no_fpos.write_f; @@ struct file_operations fops = { ... .write = write_f, ... +.llseek = noop_llseek, /* write uses no f_pos */ }; @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; identifier read_no_fpos.read_f; @@ struct file_operations fops = { ... .read = read_f, ... +.llseek = noop_llseek, /* read uses no f_pos */ }; @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @ identifier fops0.fops; @@ struct file_operations fops = { ... +.llseek = noop_llseek, /* no read or write fn */ }; ===== End semantic patch ===== Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Julia Lawall <julia@diku.dk> Cc: Christoph Hellwig <hch@infradead.org>
2010-08-15 16:52:59 +00:00
.llseek = noop_llseek,
};
/*
* PCI hotplug support registration structure
*/
static struct pci_driver megasas_pci_driver = {
.name = "megaraid_sas",
.id_table = megasas_pci_table,
.probe = megasas_probe_one,
.remove = __devexit_p(megasas_detach_one),
.suspend = megasas_suspend,
.resume = megasas_resume,
.shutdown = megasas_shutdown,
};
/*
* Sysfs driver attributes
*/
static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
{
return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
MEGASAS_VERSION);
}
static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
static ssize_t
megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
{
return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
MEGASAS_RELDATE);
}
static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
NULL);
static ssize_t
megasas_sysfs_show_support_poll_for_event(struct device_driver *dd, char *buf)
{
return sprintf(buf, "%u\n", support_poll_for_event);
}
static DRIVER_ATTR(support_poll_for_event, S_IRUGO,
megasas_sysfs_show_support_poll_for_event, NULL);
static ssize_t
megasas_sysfs_show_support_device_change(struct device_driver *dd, char *buf)
{
return sprintf(buf, "%u\n", support_device_change);
}
static DRIVER_ATTR(support_device_change, S_IRUGO,
megasas_sysfs_show_support_device_change, NULL);
static ssize_t
megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
{
return sprintf(buf, "%u\n", megasas_dbg_lvl);
}
static ssize_t
megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
{
int retval = count;
if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
printk(KERN_ERR "megasas: could not set dbg_lvl\n");
retval = -EINVAL;
}
return retval;
}
static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUSR, megasas_sysfs_show_dbg_lvl,
megasas_sysfs_set_dbg_lvl);
static void
megasas_aen_polling(struct work_struct *work)
{
struct megasas_aen_event *ev =
container_of(work, struct megasas_aen_event, hotplug_work);
struct megasas_instance *instance = ev->instance;
union megasas_evt_class_locale class_locale;
struct Scsi_Host *host;
struct scsi_device *sdev1;
u16 pd_index = 0;
u16 ld_index = 0;
int i, j, doscan = 0;
u32 seq_num;
int error;
if (!instance) {
printk(KERN_ERR "invalid instance!\n");
kfree(ev);
return;
}
instance->ev = NULL;
host = instance->host;
if (instance->evt_detail) {
switch (instance->evt_detail->code) {
case MR_EVT_PD_INSERTED:
if (megasas_get_pd_list(instance) == 0) {
for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
for (j = 0;
j < MEGASAS_MAX_DEV_PER_CHANNEL;
j++) {
pd_index =
(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
sdev1 =
scsi_device_lookup(host, i, j, 0);
if (instance->pd_list[pd_index].driveState
== MR_PD_STATE_SYSTEM) {
if (!sdev1) {
scsi_add_device(host, i, j, 0);
}
if (sdev1)
scsi_device_put(sdev1);
}
}
}
}
doscan = 0;
break;
case MR_EVT_PD_REMOVED:
if (megasas_get_pd_list(instance) == 0) {
for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
for (j = 0;
j < MEGASAS_MAX_DEV_PER_CHANNEL;
j++) {
pd_index =
(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
sdev1 =
scsi_device_lookup(host, i, j, 0);
if (instance->pd_list[pd_index].driveState
== MR_PD_STATE_SYSTEM) {
if (sdev1) {
scsi_device_put(sdev1);
}
} else {
if (sdev1) {
scsi_remove_device(sdev1);
scsi_device_put(sdev1);
}
}
}
}
}
doscan = 0;
break;
case MR_EVT_LD_OFFLINE:
case MR_EVT_CFG_CLEARED:
case MR_EVT_LD_DELETED:
megasas_get_ld_list(instance);
for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
for (j = 0;
j < MEGASAS_MAX_DEV_PER_CHANNEL;
j++) {
ld_index =
(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
sdev1 = scsi_device_lookup(host,
i + MEGASAS_MAX_LD_CHANNELS,
j,
0);
if (instance->ld_ids[ld_index] != 0xff) {
if (sdev1) {
scsi_device_put(sdev1);
}
} else {
if (sdev1) {
scsi_remove_device(sdev1);
scsi_device_put(sdev1);
}
}
}
}
doscan = 0;
break;
case MR_EVT_LD_CREATED:
megasas_get_ld_list(instance);
for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
for (j = 0;
j < MEGASAS_MAX_DEV_PER_CHANNEL;
j++) {
ld_index =
(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
sdev1 = scsi_device_lookup(host,
i+MEGASAS_MAX_LD_CHANNELS,
j, 0);
if (instance->ld_ids[ld_index] !=
0xff) {
if (!sdev1) {
scsi_add_device(host,
i + 2,
j, 0);
}
}
if (sdev1) {
scsi_device_put(sdev1);
}
}
}
doscan = 0;
break;
case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
case MR_EVT_FOREIGN_CFG_IMPORTED:
case MR_EVT_LD_STATE_CHANGE:
doscan = 1;
break;
default:
doscan = 0;
break;
}
} else {
printk(KERN_ERR "invalid evt_detail!\n");
kfree(ev);
return;
}
if (doscan) {
printk(KERN_INFO "scanning ...\n");
megasas_get_pd_list(instance);
for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
sdev1 = scsi_device_lookup(host, i, j, 0);
if (instance->pd_list[pd_index].driveState ==
MR_PD_STATE_SYSTEM) {
if (!sdev1) {
scsi_add_device(host, i, j, 0);
}
if (sdev1)
scsi_device_put(sdev1);
} else {
if (sdev1) {
scsi_remove_device(sdev1);
scsi_device_put(sdev1);
}
}
}
}
megasas_get_ld_list(instance);
for (i = 0; i < MEGASAS_MAX_LD_CHANNELS; i++) {
for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
ld_index =
(i * MEGASAS_MAX_DEV_PER_CHANNEL) + j;
sdev1 = scsi_device_lookup(host,
i+MEGASAS_MAX_LD_CHANNELS, j, 0);
if (instance->ld_ids[ld_index] != 0xff) {
if (!sdev1) {
scsi_add_device(host,
i+2,
j, 0);
} else {
scsi_device_put(sdev1);
}
} else {
if (sdev1) {
scsi_remove_device(sdev1);
scsi_device_put(sdev1);
}
}
}
}
}
if ( instance->aen_cmd != NULL ) {
kfree(ev);
return ;
}
seq_num = instance->evt_detail->seq_num + 1;
/* Register AEN with FW for latest sequence number plus 1 */
class_locale.members.reserved = 0;
class_locale.members.locale = MR_EVT_LOCALE_ALL;
class_locale.members.class = MR_EVT_CLASS_DEBUG;
mutex_lock(&instance->aen_mutex);
error = megasas_register_aen(instance, seq_num,
class_locale.word);
mutex_unlock(&instance->aen_mutex);
if (error)
printk(KERN_ERR "register aen failed error %x\n", error);
kfree(ev);
}
/**
* megasas_init - Driver load entry point
*/
static int __init megasas_init(void)
{
int rval;
/*
* Announce driver version and other information
*/
printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
MEGASAS_EXT_VERSION);
spin_lock_init(&poll_aen_lock);
support_poll_for_event = 2;
support_device_change = 1;
memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
/*
* Register character device node
*/
rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
if (rval < 0) {
printk(KERN_DEBUG "megasas: failed to open device node\n");
return rval;
}
megasas_mgmt_majorno = rval;
/*
* Register ourselves as PCI hotplug module
*/
rval = pci_register_driver(&megasas_pci_driver);
if (rval) {
printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
goto err_pcidrv;
}
rval = driver_create_file(&megasas_pci_driver.driver,
&driver_attr_version);
if (rval)
goto err_dcf_attr_ver;
rval = driver_create_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
if (rval)
goto err_dcf_rel_date;
rval = driver_create_file(&megasas_pci_driver.driver,
&driver_attr_support_poll_for_event);
if (rval)
goto err_dcf_support_poll_for_event;
rval = driver_create_file(&megasas_pci_driver.driver,
&driver_attr_dbg_lvl);
if (rval)
goto err_dcf_dbg_lvl;
rval = driver_create_file(&megasas_pci_driver.driver,
&driver_attr_support_device_change);
if (rval)
goto err_dcf_support_device_change;
return rval;
err_dcf_support_device_change:
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_dbg_lvl);
err_dcf_dbg_lvl:
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_support_poll_for_event);
err_dcf_support_poll_for_event:
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
err_dcf_rel_date:
driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
err_dcf_attr_ver:
pci_unregister_driver(&megasas_pci_driver);
err_pcidrv:
unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
return rval;
}
/**
* megasas_exit - Driver unload entry point
*/
static void __exit megasas_exit(void)
{
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_dbg_lvl);
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_support_poll_for_event);
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_support_device_change);
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
pci_unregister_driver(&megasas_pci_driver);
unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
}
module_init(megasas_init);
module_exit(megasas_exit);