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linux/drivers/scsi/pm8001/pm8001_sas.h
Mark Salyzyn 5954d7380f [SCSI] pm8001: deficient responses to IO_XFER_ERROR_BREAK and IO_XFER_OPEN_RETRY_TIMEOUT 
IO_XFER_ERROR_BREAK and IO_XFER_OPEN_RETRY_TIMEOUT are deficient of the
required actions as outlined in the programming manual for the pm8001. Due to
the overlapping code requirements of these recovery responses, we found it
necessary to bundle them together into one patch.

When a break is received during the command phase (ssp_completion), this is a
result of a timeout or interruption on the bus. Logic suggests that we should
retry the command.

When a break is received during the data-phase (ssp_event), the task must be
aborted on the target or it will retain a data-phase lock turning the target
reticent to all future media commands yet will successfully respond to TUR,
INQUIRY and ABORT leading eventually to target failure through several
abort-cycle loops.

The open retry interval is exceedingly short resulting in occasional target
drop-off during expander resets or when targets push-back during bad-block
remapping. Increased effective timeout from 130ms to 1.5 seconds for each try
so as to trigger after the administrative inquiry/tur timeout in the scsi
subsystem to keep error-recovery harmonics to a minimum.

When an open retry timeout event is received, the action required by the
targets is to issue an abort for the outstanding command then logic suggests
we retry the command as this state is usually an indication of a credit block
or busy condition on the target.

We hijacked the pm8001_handle_event work queue handler so that it will handle
task as an argument instead of device for the workers in support of the
deferred handling outlined above.

Moderate to Heavy bad-path testing on a 2.6.32 vintage kernel, compile-testing
on scsi-misc-2.6 kernel ...

Signed-off-by: Mark Salyzyn <mark_salyzyn@xyratex.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-02-19 08:08:52 -06:00

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/*
* PMC-Sierra SPC 8001 SAS/SATA based host adapters driver
*
* Copyright (c) 2008-2009 USI Co., Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
*/
#ifndef _PM8001_SAS_H_
#define _PM8001_SAS_H_
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <scsi/libsas.h>
#include <scsi/scsi_tcq.h>
#include <scsi/sas_ata.h>
#include <linux/atomic.h>
#include "pm8001_defs.h"
#define DRV_NAME "pm8001"
#define DRV_VERSION "0.1.36"
#define PM8001_FAIL_LOGGING 0x01 /* Error message logging */
#define PM8001_INIT_LOGGING 0x02 /* driver init logging */
#define PM8001_DISC_LOGGING 0x04 /* discovery layer logging */
#define PM8001_IO_LOGGING 0x08 /* I/O path logging */
#define PM8001_EH_LOGGING 0x10 /* libsas EH function logging*/
#define PM8001_IOCTL_LOGGING 0x20 /* IOCTL message logging */
#define PM8001_MSG_LOGGING 0x40 /* misc message logging */
#define pm8001_printk(format, arg...) printk(KERN_INFO "%s %d:" format,\
__func__, __LINE__, ## arg)
#define PM8001_CHECK_LOGGING(HBA, LEVEL, CMD) \
do { \
if (unlikely(HBA->logging_level & LEVEL)) \
do { \
CMD; \
} while (0); \
} while (0);
#define PM8001_EH_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_EH_LOGGING, CMD)
#define PM8001_INIT_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_INIT_LOGGING, CMD)
#define PM8001_DISC_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_DISC_LOGGING, CMD)
#define PM8001_IO_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_IO_LOGGING, CMD)
#define PM8001_FAIL_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_FAIL_LOGGING, CMD)
#define PM8001_IOCTL_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_IOCTL_LOGGING, CMD)
#define PM8001_MSG_DBG(HBA, CMD) \
PM8001_CHECK_LOGGING(HBA, PM8001_MSG_LOGGING, CMD)
#define PM8001_USE_TASKLET
#define PM8001_USE_MSIX
#define PM8001_READ_VPD
#define DEV_IS_EXPANDER(type) ((type == EDGE_DEV) || (type == FANOUT_DEV))
#define PM8001_NAME_LENGTH 32/* generic length of strings */
extern struct list_head hba_list;
extern const struct pm8001_dispatch pm8001_8001_dispatch;
struct pm8001_hba_info;
struct pm8001_ccb_info;
struct pm8001_device;
/* define task management IU */
struct pm8001_tmf_task {
u8 tmf;
u32 tag_of_task_to_be_managed;
};
struct pm8001_ioctl_payload {
u32 signature;
u16 major_function;
u16 minor_function;
u16 length;
u16 status;
u16 offset;
u16 id;
u8 *func_specific;
};
struct pm8001_dispatch {
char *name;
int (*chip_init)(struct pm8001_hba_info *pm8001_ha);
int (*chip_soft_rst)(struct pm8001_hba_info *pm8001_ha, u32 signature);
void (*chip_rst)(struct pm8001_hba_info *pm8001_ha);
int (*chip_ioremap)(struct pm8001_hba_info *pm8001_ha);
void (*chip_iounmap)(struct pm8001_hba_info *pm8001_ha);
irqreturn_t (*isr)(struct pm8001_hba_info *pm8001_ha);
u32 (*is_our_interupt)(struct pm8001_hba_info *pm8001_ha);
int (*isr_process_oq)(struct pm8001_hba_info *pm8001_ha);
void (*interrupt_enable)(struct pm8001_hba_info *pm8001_ha);
void (*interrupt_disable)(struct pm8001_hba_info *pm8001_ha);
void (*make_prd)(struct scatterlist *scatter, int nr, void *prd);
int (*smp_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_ccb_info *ccb);
int (*ssp_io_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_ccb_info *ccb);
int (*sata_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_ccb_info *ccb);
int (*phy_start_req)(struct pm8001_hba_info *pm8001_ha, u8 phy_id);
int (*phy_stop_req)(struct pm8001_hba_info *pm8001_ha, u8 phy_id);
int (*reg_dev_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_device *pm8001_dev, u32 flag);
int (*dereg_dev_req)(struct pm8001_hba_info *pm8001_ha, u32 device_id);
int (*phy_ctl_req)(struct pm8001_hba_info *pm8001_ha,
u32 phy_id, u32 phy_op);
int (*task_abort)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_device *pm8001_dev, u8 flag, u32 task_tag,
u32 cmd_tag);
int (*ssp_tm_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf);
int (*get_nvmd_req)(struct pm8001_hba_info *pm8001_ha, void *payload);
int (*set_nvmd_req)(struct pm8001_hba_info *pm8001_ha, void *payload);
int (*fw_flash_update_req)(struct pm8001_hba_info *pm8001_ha,
void *payload);
int (*set_dev_state_req)(struct pm8001_hba_info *pm8001_ha,
struct pm8001_device *pm8001_dev, u32 state);
int (*sas_diag_start_end_req)(struct pm8001_hba_info *pm8001_ha,
u32 state);
int (*sas_diag_execute_req)(struct pm8001_hba_info *pm8001_ha,
u32 state);
int (*sas_re_init_req)(struct pm8001_hba_info *pm8001_ha);
};
struct pm8001_chip_info {
u32 n_phy;
const struct pm8001_dispatch *dispatch;
};
#define PM8001_CHIP_DISP (pm8001_ha->chip->dispatch)
struct pm8001_port {
struct asd_sas_port sas_port;
u8 port_attached;
u8 wide_port_phymap;
u8 port_state;
struct list_head list;
};
struct pm8001_phy {
struct pm8001_hba_info *pm8001_ha;
struct pm8001_port *port;
struct asd_sas_phy sas_phy;
struct sas_identify identify;
struct scsi_device *sdev;
u64 dev_sas_addr;
u32 phy_type;
struct completion *enable_completion;
u32 frame_rcvd_size;
u8 frame_rcvd[32];
u8 phy_attached;
u8 phy_state;
enum sas_linkrate minimum_linkrate;
enum sas_linkrate maximum_linkrate;
};
struct pm8001_device {
enum sas_dev_type dev_type;
struct domain_device *sas_device;
u32 attached_phy;
u32 id;
struct completion *dcompletion;
struct completion *setds_completion;
u32 device_id;
u32 running_req;
};
struct pm8001_prd_imt {
__le32 len;
__le32 e;
};
struct pm8001_prd {
__le64 addr; /* 64-bit buffer address */
struct pm8001_prd_imt im_len; /* 64-bit length */
} __attribute__ ((packed));
/*
* CCB(Command Control Block)
*/
struct pm8001_ccb_info {
struct list_head entry;
struct sas_task *task;
u32 n_elem;
u32 ccb_tag;
dma_addr_t ccb_dma_handle;
struct pm8001_device *device;
struct pm8001_prd buf_prd[PM8001_MAX_DMA_SG];
struct fw_control_ex *fw_control_context;
u8 open_retry;
};
struct mpi_mem {
void *virt_ptr;
dma_addr_t phys_addr;
u32 phys_addr_hi;
u32 phys_addr_lo;
u32 total_len;
u32 num_elements;
u32 element_size;
u32 alignment;
};
struct mpi_mem_req {
/* The number of element in the mpiMemory array */
u32 count;
/* The array of structures that define memroy regions*/
struct mpi_mem region[USI_MAX_MEMCNT];
};
struct main_cfg_table {
u32 signature;
u32 interface_rev;
u32 firmware_rev;
u32 max_out_io;
u32 max_sgl;
u32 ctrl_cap_flag;
u32 gst_offset;
u32 inbound_queue_offset;
u32 outbound_queue_offset;
u32 inbound_q_nppd_hppd;
u32 outbound_hw_event_pid0_3;
u32 outbound_hw_event_pid4_7;
u32 outbound_ncq_event_pid0_3;
u32 outbound_ncq_event_pid4_7;
u32 outbound_tgt_ITNexus_event_pid0_3;
u32 outbound_tgt_ITNexus_event_pid4_7;
u32 outbound_tgt_ssp_event_pid0_3;
u32 outbound_tgt_ssp_event_pid4_7;
u32 outbound_tgt_smp_event_pid0_3;
u32 outbound_tgt_smp_event_pid4_7;
u32 upper_event_log_addr;
u32 lower_event_log_addr;
u32 event_log_size;
u32 event_log_option;
u32 upper_iop_event_log_addr;
u32 lower_iop_event_log_addr;
u32 iop_event_log_size;
u32 iop_event_log_option;
u32 fatal_err_interrupt;
u32 fatal_err_dump_offset0;
u32 fatal_err_dump_length0;
u32 fatal_err_dump_offset1;
u32 fatal_err_dump_length1;
u32 hda_mode_flag;
u32 anolog_setup_table_offset;
};
struct general_status_table {
u32 gst_len_mpistate;
u32 iq_freeze_state0;
u32 iq_freeze_state1;
u32 msgu_tcnt;
u32 iop_tcnt;
u32 reserved;
u32 phy_state[8];
u32 reserved1;
u32 reserved2;
u32 reserved3;
u32 recover_err_info[8];
};
struct inbound_queue_table {
u32 element_pri_size_cnt;
u32 upper_base_addr;
u32 lower_base_addr;
u32 ci_upper_base_addr;
u32 ci_lower_base_addr;
u32 pi_pci_bar;
u32 pi_offset;
u32 total_length;
void *base_virt;
void *ci_virt;
u32 reserved;
__le32 consumer_index;
u32 producer_idx;
};
struct outbound_queue_table {
u32 element_size_cnt;
u32 upper_base_addr;
u32 lower_base_addr;
void *base_virt;
u32 pi_upper_base_addr;
u32 pi_lower_base_addr;
u32 ci_pci_bar;
u32 ci_offset;
u32 total_length;
void *pi_virt;
u32 interrup_vec_cnt_delay;
u32 dinterrup_to_pci_offset;
__le32 producer_index;
u32 consumer_idx;
};
struct pm8001_hba_memspace {
void __iomem *memvirtaddr;
u64 membase;
u32 memsize;
};
struct pm8001_hba_info {
char name[PM8001_NAME_LENGTH];
struct list_head list;
unsigned long flags;
spinlock_t lock;/* host-wide lock */
struct pci_dev *pdev;/* our device */
struct device *dev;
struct pm8001_hba_memspace io_mem[6];
struct mpi_mem_req memoryMap;
void __iomem *msg_unit_tbl_addr;/*Message Unit Table Addr*/
void __iomem *main_cfg_tbl_addr;/*Main Config Table Addr*/
void __iomem *general_stat_tbl_addr;/*General Status Table Addr*/
void __iomem *inbnd_q_tbl_addr;/*Inbound Queue Config Table Addr*/
void __iomem *outbnd_q_tbl_addr;/*Outbound Queue Config Table Addr*/
struct main_cfg_table main_cfg_tbl;
struct general_status_table gs_tbl;
struct inbound_queue_table inbnd_q_tbl[PM8001_MAX_INB_NUM];
struct outbound_queue_table outbnd_q_tbl[PM8001_MAX_OUTB_NUM];
u8 sas_addr[SAS_ADDR_SIZE];
struct sas_ha_struct *sas;/* SCSI/SAS glue */
struct Scsi_Host *shost;
u32 chip_id;
const struct pm8001_chip_info *chip;
struct completion *nvmd_completion;
int tags_num;
unsigned long *tags;
struct pm8001_phy phy[PM8001_MAX_PHYS];
struct pm8001_port port[PM8001_MAX_PHYS];
u32 id;
u32 irq;
struct pm8001_device *devices;
struct pm8001_ccb_info *ccb_info;
#ifdef PM8001_USE_MSIX
struct msix_entry msix_entries[16];/*for msi-x interrupt*/
int number_of_intr;/*will be used in remove()*/
#endif
#ifdef PM8001_USE_TASKLET
struct tasklet_struct tasklet;
#endif
u32 logging_level;
u32 fw_status;
const struct firmware *fw_image;
};
struct pm8001_work {
struct work_struct work;
struct pm8001_hba_info *pm8001_ha;
void *data;
int handler;
};
struct pm8001_fw_image_header {
u8 vender_id[8];
u8 product_id;
u8 hardware_rev;
u8 dest_partition;
u8 reserved;
u8 fw_rev[4];
__be32 image_length;
__be32 image_crc;
__be32 startup_entry;
} __attribute__((packed, aligned(4)));
/**
* FW Flash Update status values
*/
#define FLASH_UPDATE_COMPLETE_PENDING_REBOOT 0x00
#define FLASH_UPDATE_IN_PROGRESS 0x01
#define FLASH_UPDATE_HDR_ERR 0x02
#define FLASH_UPDATE_OFFSET_ERR 0x03
#define FLASH_UPDATE_CRC_ERR 0x04
#define FLASH_UPDATE_LENGTH_ERR 0x05
#define FLASH_UPDATE_HW_ERR 0x06
#define FLASH_UPDATE_DNLD_NOT_SUPPORTED 0x10
#define FLASH_UPDATE_DISABLED 0x11
/**
* brief param structure for firmware flash update.
*/
struct fw_flash_updata_info {
u32 cur_image_offset;
u32 cur_image_len;
u32 total_image_len;
struct pm8001_prd sgl;
};
struct fw_control_info {
u32 retcode;/*ret code (status)*/
u32 phase;/*ret code phase*/
u32 phaseCmplt;/*percent complete for the current
update phase */
u32 version;/*Hex encoded firmware version number*/
u32 offset;/*Used for downloading firmware */
u32 len; /*len of buffer*/
u32 size;/* Used in OS VPD and Trace get size
operations.*/
u32 reserved;/* padding required for 64 bit
alignment */
u8 buffer[1];/* Start of buffer */
};
struct fw_control_ex {
struct fw_control_info *fw_control;
void *buffer;/* keep buffer pointer to be
freed when the response comes*/
void *virtAddr;/* keep virtual address of the data */
void *usrAddr;/* keep virtual address of the
user data */
dma_addr_t phys_addr;
u32 len; /* len of buffer */
void *payload; /* pointer to IOCTL Payload */
u8 inProgress;/*if 1 - the IOCTL request is in
progress */
void *param1;
void *param2;
void *param3;
};
/* pm8001 workqueue */
extern struct workqueue_struct *pm8001_wq;
/******************** function prototype *********************/
int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out);
void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha);
u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag);
void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx);
void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx);
int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
void *funcdata);
void pm8001_scan_start(struct Scsi_Host *shost);
int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time);
int pm8001_queue_command(struct sas_task *task, const int num,
gfp_t gfp_flags);
int pm8001_abort_task(struct sas_task *task);
int pm8001_abort_task_set(struct domain_device *dev, u8 *lun);
int pm8001_clear_aca(struct domain_device *dev, u8 *lun);
int pm8001_clear_task_set(struct domain_device *dev, u8 *lun);
int pm8001_dev_found(struct domain_device *dev);
void pm8001_dev_gone(struct domain_device *dev);
int pm8001_lu_reset(struct domain_device *dev, u8 *lun);
int pm8001_I_T_nexus_reset(struct domain_device *dev);
int pm8001_query_task(struct sas_task *task);
void pm8001_open_reject_retry(
struct pm8001_hba_info *pm8001_ha,
struct sas_task *task_to_close,
struct pm8001_device *device_to_close);
int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
dma_addr_t *pphys_addr, u32 *pphys_addr_hi, u32 *pphys_addr_lo,
u32 mem_size, u32 align);
int pm8001_bar4_shift(struct pm8001_hba_info *pm8001_ha, u32 shiftValue);
/* ctl shared API */
extern struct device_attribute *pm8001_host_attrs[];
#endif
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