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linux/drivers/scsi/pmcraid.h
Arnd Bergmann e92b0b5edf scsi: pmcraid: Fix 'ioarcb' alignment warning 
Building with 'make W=1' enables -Wpacked-not-aligned, and this warns about
pmcraid because of incompatible alignment constraints for
pmcraid_passthrough_ioctl_buffer:

drivers/scsi/pmcraid.h:1044:1: warning: alignment 1 of 'struct pmcraid_passthrough_ioctl_buffer' is less than 32 [-Wpacked-not-aligned]
 1044 | } __attribute__ ((packed));
      | ^
drivers/scsi/pmcraid.h:1041:24: warning: 'ioarcb' offset 16 in 'struct pmcraid_passthrough_ioctl_buffer' isn't aligned to 32 [-Wpacked-not-aligned]
 1041 |  struct pmcraid_ioarcb ioarcb;

The inner structure is documented as having 32 byte alignment here, but is
starts at a 16 byte offset in the outer structure, so it's never actually
aligned, as the outer structure is also marked 'packed'.

Lee Jones point this out as one of the last files that need to be changed
before the warning can be enabled by default.

Change the annotations in a way that avoids the warning but leaves the
layout unchanged, by removing the packing on the inner structure and adding
it to the outer one. The one-byte request_buffer[] array should have been a
flexible array member here, which is how I change it to avoid extra padding
from the alignment attribute.

Link: https://lore.kernel.org/r/20210204163020.3286210-1-arnd@kernel.org
Cc: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-02-08 21:53:12 -05:00

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* pmcraid.h -- PMC Sierra MaxRAID controller driver header file
*
* Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
* PMC-Sierra Inc
*
* Copyright (C) 2008, 2009 PMC Sierra Inc.
*/
#ifndef _PMCRAID_H
#define _PMCRAID_H
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/list.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <linux/cdev.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <linux/connector.h>
/*
* Driver name : string representing the driver name
* Device file : /dev file to be used for management interfaces
* Driver version: version string in major_version.minor_version.patch format
* Driver date : date information in "Mon dd yyyy" format
*/
#define PMCRAID_DRIVER_NAME "PMC MaxRAID"
#define PMCRAID_DEVFILE "pmcsas"
#define PMCRAID_DRIVER_VERSION "1.0.3"
#define PMCRAID_FW_VERSION_1 0x002
/* Maximum number of adapters supported by current version of the driver */
#define PMCRAID_MAX_ADAPTERS 1024
/* Bit definitions as per firmware, bit position [0][1][2].....[31] */
#define PMC_BIT8(n) (1 << (7-n))
#define PMC_BIT16(n) (1 << (15-n))
#define PMC_BIT32(n) (1 << (31-n))
/* PMC PCI vendor ID and device ID values */
#define PCI_VENDOR_ID_PMC 0x11F8
#define PCI_DEVICE_ID_PMC_MAXRAID 0x5220
/*
* MAX_CMD : maximum commands that can be outstanding with IOA
* MAX_IO_CMD : command blocks available for IO commands
* MAX_HCAM_CMD : command blocks avaibale for HCAMS
* MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
*/
#define PMCRAID_MAX_CMD 1024
#define PMCRAID_MAX_IO_CMD 1020
#define PMCRAID_MAX_HCAM_CMD 2
#define PMCRAID_MAX_INTERNAL_CMD 2
/* MAX_IOADLS : max number of scatter-gather lists supported by IOA
* IOADLS_INTERNAL : number of ioadls included as part of IOARCB.
* IOADLS_EXTERNAL : number of ioadls allocated external to IOARCB
*/
#define PMCRAID_IOADLS_INTERNAL 27
#define PMCRAID_IOADLS_EXTERNAL 37
#define PMCRAID_MAX_IOADLS PMCRAID_IOADLS_INTERNAL
/* HRRQ_ENTRY_SIZE : size of hrrq buffer
* IOARCB_ALIGNMENT : alignment required for IOARCB
* IOADL_ALIGNMENT : alignment requirement for IOADLs
* MSIX_VECTORS : number of MSIX vectors supported
*/
#define HRRQ_ENTRY_SIZE sizeof(__le32)
#define PMCRAID_IOARCB_ALIGNMENT 32
#define PMCRAID_IOADL_ALIGNMENT 16
#define PMCRAID_IOASA_ALIGNMENT 4
#define PMCRAID_NUM_MSIX_VECTORS 16
/* various other limits */
#define PMCRAID_VENDOR_ID_LEN 8
#define PMCRAID_PRODUCT_ID_LEN 16
#define PMCRAID_SERIAL_NUM_LEN 8
#define PMCRAID_LUN_LEN 8
#define PMCRAID_MAX_CDB_LEN 16
#define PMCRAID_DEVICE_ID_LEN 8
#define PMCRAID_SENSE_DATA_LEN 256
#define PMCRAID_ADD_CMD_PARAM_LEN 48
#define PMCRAID_MAX_BUS_TO_SCAN 1
#define PMCRAID_MAX_NUM_TARGETS_PER_BUS 256
#define PMCRAID_MAX_NUM_LUNS_PER_TARGET 8
/* IOA bus/target/lun number of IOA resources */
#define PMCRAID_IOA_BUS_ID 0xfe
#define PMCRAID_IOA_TARGET_ID 0xff
#define PMCRAID_IOA_LUN_ID 0xff
#define PMCRAID_VSET_BUS_ID 0x1
#define PMCRAID_VSET_LUN_ID 0x0
#define PMCRAID_PHYS_BUS_ID 0x0
#define PMCRAID_VIRTUAL_ENCL_BUS_ID 0x8
#define PMCRAID_MAX_VSET_TARGETS 0x7F
#define PMCRAID_MAX_VSET_LUNS_PER_TARGET 8
#define PMCRAID_IOA_MAX_SECTORS 32767
#define PMCRAID_VSET_MAX_SECTORS 512
#define PMCRAID_MAX_CMD_PER_LUN 254
/* Number of configuration table entries (resources), includes 1 FP,
* 1 Enclosure device
*/
#define PMCRAID_MAX_RESOURCES 256
/* Adapter Commands used by driver */
#define PMCRAID_QUERY_RESOURCE_STATE 0xC2
#define PMCRAID_RESET_DEVICE 0xC3
/* options to select reset target */
#define ENABLE_RESET_MODIFIER 0x80
#define RESET_DEVICE_LUN 0x40
#define RESET_DEVICE_TARGET 0x20
#define RESET_DEVICE_BUS 0x10
#define PMCRAID_IDENTIFY_HRRQ 0xC4
#define PMCRAID_QUERY_IOA_CONFIG 0xC5
#define PMCRAID_QUERY_CMD_STATUS 0xCB
#define PMCRAID_ABORT_CMD 0xC7
/* CANCEL ALL command, provides option for setting SYNC_COMPLETE
* on the target resources for which commands got cancelled
*/
#define PMCRAID_CANCEL_ALL_REQUESTS 0xCE
#define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL PMC_BIT8(0)
/* HCAM command and types of HCAM supported by IOA */
#define PMCRAID_HOST_CONTROLLED_ASYNC 0xCF
#define PMCRAID_HCAM_CODE_CONFIG_CHANGE 0x01
#define PMCRAID_HCAM_CODE_LOG_DATA 0x02
/* IOA shutdown command and various shutdown types */
#define PMCRAID_IOA_SHUTDOWN 0xF7
#define PMCRAID_SHUTDOWN_NORMAL 0x00
#define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL 0x40
#define PMCRAID_SHUTDOWN_NONE 0x100
#define PMCRAID_SHUTDOWN_ABBREV 0x80
/* SET SUPPORTED DEVICES command and the option to select all the
* devices to be supported
*/
#define PMCRAID_SET_SUPPORTED_DEVICES 0xFB
#define ALL_DEVICES_SUPPORTED PMC_BIT8(0)
/* This option is used with SCSI WRITE_BUFFER command */
#define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE 0x05
/* IOASC Codes used by driver */
#define PMCRAID_IOASC_SENSE_MASK 0xFFFFFF00
#define PMCRAID_IOASC_SENSE_KEY(ioasc) ((ioasc) >> 24)
#define PMCRAID_IOASC_SENSE_CODE(ioasc) (((ioasc) & 0x00ff0000) >> 16)
#define PMCRAID_IOASC_SENSE_QUAL(ioasc) (((ioasc) & 0x0000ff00) >> 8)
#define PMCRAID_IOASC_SENSE_STATUS(ioasc) ((ioasc) & 0x000000ff)
#define PMCRAID_IOASC_GOOD_COMPLETION 0x00000000
#define PMCRAID_IOASC_GC_IOARCB_NOTFOUND 0x005A0000
#define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED 0x02040200
#define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED 0x02048000
#define PMCRAID_IOASC_NR_SYNC_REQUIRED 0x023F0000
#define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC 0x03110C00
#define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE 0x04050000
#define PMCRAID_IOASC_HW_DEVICE_TIMEOUT 0x04080100
#define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR 0x04448500
#define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED 0x04448600
#define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE 0x05250000
#define PMCRAID_IOASC_AC_TERMINATED_BY_HOST 0x0B5A0000
#define PMCRAID_IOASC_UA_BUS_WAS_RESET 0x06290000
#define PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC 0x06908B00
#define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER 0x06298000
/* Driver defined IOASCs */
#define PMCRAID_IOASC_IOA_WAS_RESET 0x10000001
#define PMCRAID_IOASC_PCI_ACCESS_ERROR 0x10000002
/* Various timeout values (in milliseconds) used. If any of these are chip
* specific, move them to pmcraid_chip_details structure.
*/
#define PMCRAID_PCI_DEASSERT_TIMEOUT 2000
#define PMCRAID_BIST_TIMEOUT 2000
#define PMCRAID_AENWAIT_TIMEOUT 5000
#define PMCRAID_TRANSOP_TIMEOUT 60000
#define PMCRAID_RESET_TIMEOUT (2 * HZ)
#define PMCRAID_CHECK_FOR_RESET_TIMEOUT ((HZ / 10))
#define PMCRAID_VSET_IO_TIMEOUT (60 * HZ)
#define PMCRAID_INTERNAL_TIMEOUT (60 * HZ)
#define PMCRAID_SHUTDOWN_TIMEOUT (150 * HZ)
#define PMCRAID_RESET_BUS_TIMEOUT (60 * HZ)
#define PMCRAID_RESET_HOST_TIMEOUT (150 * HZ)
#define PMCRAID_REQUEST_SENSE_TIMEOUT (30 * HZ)
#define PMCRAID_SET_SUP_DEV_TIMEOUT (2 * 60 * HZ)
/* structure to represent a scatter-gather element (IOADL descriptor) */
struct pmcraid_ioadl_desc {
__le64 address;
__le32 data_len;
__u8 reserved[3];
__u8 flags;
} __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
/* pmcraid_ioadl_desc.flags values */
#define IOADL_FLAGS_CHAINED PMC_BIT8(0)
#define IOADL_FLAGS_LAST_DESC PMC_BIT8(1)
#define IOADL_FLAGS_READ_LAST PMC_BIT8(1)
#define IOADL_FLAGS_WRITE_LAST PMC_BIT8(1)
/* additional IOARCB data which can be CDB or additional request parameters
* or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
* number of IOADLs are limted to 27. In case they are more than 27, they will
* be used in chained form
*/
struct pmcraid_ioarcb_add_data {
union {
struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
__u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
} u;
};
/*
* IOA Request Control Block
*/
struct pmcraid_ioarcb {
__le64 ioarcb_bus_addr;
__le32 resource_handle;
__le32 response_handle;
__le64 ioadl_bus_addr;
__le32 ioadl_length;
__le32 data_transfer_length;
__le64 ioasa_bus_addr;
__le16 ioasa_len;
__le16 cmd_timeout;
__le16 add_cmd_param_offset;
__le16 add_cmd_param_length;
__le32 reserved1[2];
__le32 reserved2;
__u8 request_type;
__u8 request_flags0;
__u8 request_flags1;
__u8 hrrq_id;
__u8 cdb[PMCRAID_MAX_CDB_LEN];
struct pmcraid_ioarcb_add_data add_data;
};
/* well known resource handle values */
#define PMCRAID_IOA_RES_HANDLE 0xffffffff
#define PMCRAID_INVALID_RES_HANDLE 0
/* pmcraid_ioarcb.request_type values */
#define REQ_TYPE_SCSI 0x00
#define REQ_TYPE_IOACMD 0x01
#define REQ_TYPE_HCAM 0x02
/* pmcraid_ioarcb.flags0 values */
#define TRANSFER_DIR_WRITE PMC_BIT8(0)
#define INHIBIT_UL_CHECK PMC_BIT8(2)
#define SYNC_OVERRIDE PMC_BIT8(3)
#define SYNC_COMPLETE PMC_BIT8(4)
#define NO_LINK_DESCS PMC_BIT8(5)
/* pmcraid_ioarcb.flags1 values */
#define DELAY_AFTER_RESET PMC_BIT8(0)
#define TASK_TAG_SIMPLE 0x10
#define TASK_TAG_ORDERED 0x20
#define TASK_TAG_QUEUE_HEAD 0x30
/* toggle bit offset in response handle */
#define HRRQ_TOGGLE_BIT 0x01
#define HRRQ_RESPONSE_BIT 0x02
/* IOA Status Area */
struct pmcraid_ioasa_vset {
__le32 failing_lba_hi;
__le32 failing_lba_lo;
__le32 reserved;
} __attribute__((packed, aligned(4)));
struct pmcraid_ioasa {
__le32 ioasc;
__le16 returned_status_length;
__le16 available_status_length;
__le32 residual_data_length;
__le32 ilid;
__le32 fd_ioasc;
__le32 fd_res_address;
__le32 fd_res_handle;
__le32 reserved;
/* resource specific sense information */
union {
struct pmcraid_ioasa_vset vset;
} u;
/* IOA autosense data */
__le16 auto_sense_length;
__le16 error_data_length;
__u8 sense_data[PMCRAID_SENSE_DATA_LEN];
} __attribute__((packed, aligned(4)));
#define PMCRAID_DRIVER_ILID 0xffffffff
/* Config Table Entry per Resource */
struct pmcraid_config_table_entry {
__u8 resource_type;
__u8 bus_protocol;
__le16 array_id;
__u8 common_flags0;
__u8 common_flags1;
__u8 unique_flags0;
__u8 unique_flags1; /*also used as vset target_id */
__le32 resource_handle;
__le32 resource_address;
__u8 device_id[PMCRAID_DEVICE_ID_LEN];
__u8 lun[PMCRAID_LUN_LEN];
} __attribute__((packed, aligned(4)));
/* extended configuration table sizes are also of 32 bytes in size */
struct pmcraid_config_table_entry_ext {
struct pmcraid_config_table_entry cfgte;
};
/* resource types (config_table_entry.resource_type values) */
#define RES_TYPE_AF_DASD 0x00
#define RES_TYPE_GSCSI 0x01
#define RES_TYPE_VSET 0x02
#define RES_TYPE_IOA_FP 0xFF
#define RES_IS_IOA(res) ((res).resource_type == RES_TYPE_IOA_FP)
#define RES_IS_GSCSI(res) ((res).resource_type == RES_TYPE_GSCSI)
#define RES_IS_VSET(res) ((res).resource_type == RES_TYPE_VSET)
#define RES_IS_AFDASD(res) ((res).resource_type == RES_TYPE_AF_DASD)
/* bus_protocol values used by driver */
#define RES_TYPE_VENCLOSURE 0x8
/* config_table_entry.common_flags0 */
#define MULTIPATH_RESOURCE PMC_BIT32(0)
/* unique_flags1 */
#define IMPORT_MODE_MANUAL PMC_BIT8(0)
/* well known resource handle values */
#define RES_HANDLE_IOA 0xFFFFFFFF
#define RES_HANDLE_NONE 0x00000000
/* well known resource address values */
#define RES_ADDRESS_IOAFP 0xFEFFFFFF
#define RES_ADDRESS_INVALID 0xFFFFFFFF
/* BUS/TARGET/LUN values from resource_addrr */
#define RES_BUS(res_addr) (le32_to_cpu(res_addr) & 0xFF)
#define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
#define RES_LUN(res_addr) 0x0
/* configuration table structure */
struct pmcraid_config_table {
__le16 num_entries;
__u8 table_format;
__u8 reserved1;
__u8 flags;
__u8 reserved2[11];
union {
struct pmcraid_config_table_entry
entries[PMCRAID_MAX_RESOURCES];
struct pmcraid_config_table_entry_ext
entries_ext[PMCRAID_MAX_RESOURCES];
};
} __attribute__((packed, aligned(4)));
/* config_table.flags value */
#define MICROCODE_UPDATE_REQUIRED PMC_BIT32(0)
/*
* HCAM format
*/
#define PMCRAID_HOSTRCB_LDNSIZE 4056
/* Error log notification format */
struct pmcraid_hostrcb_error {
__le32 fd_ioasc;
__le32 fd_ra;
__le32 fd_rh;
__le32 prc;
union {
__u8 data[PMCRAID_HOSTRCB_LDNSIZE];
} u;
} __attribute__ ((packed, aligned(4)));
struct pmcraid_hcam_hdr {
__u8 op_code;
__u8 notification_type;
__u8 notification_lost;
__u8 flags;
__u8 overlay_id;
__u8 reserved1[3];
__le32 ilid;
__le32 timestamp1;
__le32 timestamp2;
__le32 data_len;
} __attribute__((packed, aligned(4)));
#define PMCRAID_AEN_GROUP 0x3
struct pmcraid_hcam_ccn {
struct pmcraid_hcam_hdr header;
struct pmcraid_config_table_entry cfg_entry;
struct pmcraid_config_table_entry cfg_entry_old;
} __attribute__((packed, aligned(4)));
#define PMCRAID_CCN_EXT_SIZE 3944
struct pmcraid_hcam_ccn_ext {
struct pmcraid_hcam_hdr header;
struct pmcraid_config_table_entry_ext cfg_entry;
struct pmcraid_config_table_entry_ext cfg_entry_old;
__u8 reserved[PMCRAID_CCN_EXT_SIZE];
} __attribute__((packed, aligned(4)));
struct pmcraid_hcam_ldn {
struct pmcraid_hcam_hdr header;
struct pmcraid_hostrcb_error error_log;
} __attribute__((packed, aligned(4)));
/* pmcraid_hcam.op_code values */
#define HOSTRCB_TYPE_CCN 0xE1
#define HOSTRCB_TYPE_LDN 0xE2
/* pmcraid_hcam.notification_type values */
#define NOTIFICATION_TYPE_ENTRY_CHANGED 0x0
#define NOTIFICATION_TYPE_ENTRY_NEW 0x1
#define NOTIFICATION_TYPE_ENTRY_DELETED 0x2
#define NOTIFICATION_TYPE_STATE_CHANGE 0x3
#define NOTIFICATION_TYPE_ENTRY_STATECHANGED 0x4
#define NOTIFICATION_TYPE_ERROR_LOG 0x10
#define NOTIFICATION_TYPE_INFORMATION_LOG 0x11
#define HOSTRCB_NOTIFICATIONS_LOST PMC_BIT8(0)
/* pmcraid_hcam.flags values */
#define HOSTRCB_INTERNAL_OP_ERROR PMC_BIT8(0)
#define HOSTRCB_ERROR_RESPONSE_SENT PMC_BIT8(1)
/* pmcraid_hcam.overlay_id values */
#define HOSTRCB_OVERLAY_ID_08 0x08
#define HOSTRCB_OVERLAY_ID_09 0x09
#define HOSTRCB_OVERLAY_ID_11 0x11
#define HOSTRCB_OVERLAY_ID_12 0x12
#define HOSTRCB_OVERLAY_ID_13 0x13
#define HOSTRCB_OVERLAY_ID_14 0x14
#define HOSTRCB_OVERLAY_ID_16 0x16
#define HOSTRCB_OVERLAY_ID_17 0x17
#define HOSTRCB_OVERLAY_ID_20 0x20
#define HOSTRCB_OVERLAY_ID_FF 0xFF
/* Implementation specific card details */
struct pmcraid_chip_details {
/* hardware register offsets */
unsigned long ioastatus;
unsigned long ioarrin;
unsigned long mailbox;
unsigned long global_intr_mask;
unsigned long ioa_host_intr;
unsigned long ioa_host_msix_intr;
unsigned long ioa_host_intr_clr;
unsigned long ioa_host_mask;
unsigned long ioa_host_mask_clr;
unsigned long host_ioa_intr;
unsigned long host_ioa_intr_clr;
/* timeout used during transitional to operational state */
unsigned long transop_timeout;
};
/* IOA to HOST doorbells (interrupts) */
#define INTRS_TRANSITION_TO_OPERATIONAL PMC_BIT32(0)
#define INTRS_IOARCB_TRANSFER_FAILED PMC_BIT32(3)
#define INTRS_IOA_UNIT_CHECK PMC_BIT32(4)
#define INTRS_NO_HRRQ_FOR_CMD_RESPONSE PMC_BIT32(5)
#define INTRS_CRITICAL_OP_IN_PROGRESS PMC_BIT32(6)
#define INTRS_IO_DEBUG_ACK PMC_BIT32(7)
#define INTRS_IOARRIN_LOST PMC_BIT32(27)
#define INTRS_SYSTEM_BUS_MMIO_ERROR PMC_BIT32(28)
#define INTRS_IOA_PROCESSOR_ERROR PMC_BIT32(29)
#define INTRS_HRRQ_VALID PMC_BIT32(30)
#define INTRS_OPERATIONAL_STATUS PMC_BIT32(0)
#define INTRS_ALLOW_MSIX_VECTOR0 PMC_BIT32(31)
/* Host to IOA Doorbells */
#define DOORBELL_RUNTIME_RESET PMC_BIT32(1)
#define DOORBELL_IOA_RESET_ALERT PMC_BIT32(7)
#define DOORBELL_IOA_DEBUG_ALERT PMC_BIT32(9)
#define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS PMC_BIT32(8)
#define DOORBELL_IOA_START_BIST PMC_BIT32(23)
#define DOORBELL_INTR_MODE_MSIX PMC_BIT32(25)
#define DOORBELL_INTR_MSIX_CLR PMC_BIT32(26)
#define DOORBELL_RESET_IOA PMC_BIT32(31)
/* Global interrupt mask register value */
#define GLOBAL_INTERRUPT_MASK 0x5ULL
#define PMCRAID_ERROR_INTERRUPTS (INTRS_IOARCB_TRANSFER_FAILED | \
INTRS_IOA_UNIT_CHECK | \
INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
INTRS_IOARRIN_LOST | \
INTRS_SYSTEM_BUS_MMIO_ERROR | \
INTRS_IOA_PROCESSOR_ERROR)
#define PMCRAID_PCI_INTERRUPTS (PMCRAID_ERROR_INTERRUPTS | \
INTRS_HRRQ_VALID | \
INTRS_TRANSITION_TO_OPERATIONAL |\
INTRS_ALLOW_MSIX_VECTOR0)
/* control_block, associated with each of the commands contains IOARCB, IOADLs
* memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
* additional request parameters (of max size 48) any command.
*/
struct pmcraid_control_block {
struct pmcraid_ioarcb ioarcb;
struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
struct pmcraid_ioasa ioasa;
} __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
/* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
*/
struct pmcraid_sglist {
u32 order;
u32 num_sg;
u32 num_dma_sg;
struct scatterlist *scatterlist;
};
/* page D0 inquiry data of focal point resource */
struct pmcraid_inquiry_data {
__u8 ph_dev_type;
__u8 page_code;
__u8 reserved1;
__u8 add_page_len;
__u8 length;
__u8 reserved2;
__be16 fw_version;
__u8 reserved3[16];
};
#define PMCRAID_TIMESTAMP_LEN 12
#define PMCRAID_REQ_TM_STR_LEN 6
#define PMCRAID_SCSI_SET_TIMESTAMP 0xA4
#define PMCRAID_SCSI_SERVICE_ACTION 0x0F
struct pmcraid_timestamp_data {
__u8 reserved1[4];
__u8 timestamp[PMCRAID_REQ_TM_STR_LEN]; /* current time value */
__u8 reserved2[2];
};
/* pmcraid_cmd - LLD representation of SCSI command */
struct pmcraid_cmd {
/* Ptr and bus address of DMA.able control block for this command */
struct pmcraid_control_block *ioa_cb;
dma_addr_t ioa_cb_bus_addr;
dma_addr_t dma_handle;
/* pointer to mid layer structure of SCSI commands */
struct scsi_cmnd *scsi_cmd;
struct list_head free_list;
struct completion wait_for_completion;
struct timer_list timer; /* needed for internal commands */
u32 timeout; /* current timeout value */
u32 index; /* index into the command list */
u8 completion_req; /* for handling internal commands */
u8 release; /* for handling completions */
void (*cmd_done) (struct pmcraid_cmd *);
struct pmcraid_instance *drv_inst;
struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
/* scratch used */
union {
/* during reset sequence */
unsigned long time_left;
struct pmcraid_resource_entry *res;
int hrrq_index;
/* used during IO command error handling. Sense buffer
* for REQUEST SENSE command if firmware is not sending
* auto sense data
*/
struct {
u8 *sense_buffer;
dma_addr_t sense_buffer_dma;
};
};
};
/*
* Interrupt registers of IOA
*/
struct pmcraid_interrupts {
void __iomem *ioa_host_interrupt_reg;
void __iomem *ioa_host_msix_interrupt_reg;
void __iomem *ioa_host_interrupt_clr_reg;
void __iomem *ioa_host_interrupt_mask_reg;
void __iomem *ioa_host_interrupt_mask_clr_reg;
void __iomem *global_interrupt_mask_reg;
void __iomem *host_ioa_interrupt_reg;
void __iomem *host_ioa_interrupt_clr_reg;
};
/* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
struct pmcraid_isr_param {
struct pmcraid_instance *drv_inst;
u8 hrrq_id; /* hrrq entry index */
};
/* AEN message header sent as part of event data to applications */
struct pmcraid_aen_msg {
u32 hostno;
u32 length;
u8 reserved[8];
u8 data[];
};
/* Controller state event message type */
struct pmcraid_state_msg {
struct pmcraid_aen_msg msg;
u32 ioa_state;
};
#define PMC_DEVICE_EVENT_RESET_START 0x11000000
#define PMC_DEVICE_EVENT_RESET_SUCCESS 0x11000001
#define PMC_DEVICE_EVENT_RESET_FAILED 0x11000002
#define PMC_DEVICE_EVENT_SHUTDOWN_START 0x11000003
#define PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS 0x11000004
#define PMC_DEVICE_EVENT_SHUTDOWN_FAILED 0x11000005
struct pmcraid_hostrcb {
struct pmcraid_instance *drv_inst;
struct pmcraid_aen_msg *msg;
struct pmcraid_hcam_hdr *hcam; /* pointer to hcam buffer */
struct pmcraid_cmd *cmd; /* pointer to command block used */
dma_addr_t baddr; /* system address of hcam buffer */
atomic_t ignore; /* process HCAM response ? */
};
#define PMCRAID_AEN_HDR_SIZE sizeof(struct pmcraid_aen_msg)
/*
* Per adapter structure maintained by LLD
*/
struct pmcraid_instance {
/* Array of allowed-to-be-exposed resources, initialized from
* Configutation Table, later updated with CCNs
*/
struct pmcraid_resource_entry *res_entries;
struct list_head free_res_q; /* res_entries lists for easy lookup */
struct list_head used_res_q; /* List of to be exposed resources */
spinlock_t resource_lock; /* spinlock to protect resource list */
void __iomem *mapped_dma_addr;
void __iomem *ioa_status; /* Iomapped IOA status register */
void __iomem *mailbox; /* Iomapped mailbox register */
void __iomem *ioarrin; /* IOmapped IOARR IN register */
struct pmcraid_interrupts int_regs;
struct pmcraid_chip_details *chip_cfg;
/* HostRCBs needed for HCAM */
struct pmcraid_hostrcb ldn;
struct pmcraid_hostrcb ccn;
struct pmcraid_state_msg scn; /* controller state change msg */
/* Bus address of start of HRRQ */
dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
/* Pointer to 1st entry of HRRQ */
__le32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
/* Pointer to last entry of HRRQ */
__le32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
/* Pointer to current pointer of hrrq */
__le32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
/* Lock for HRRQ access */
spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
struct pmcraid_inquiry_data *inq_data;
dma_addr_t inq_data_baddr;
struct pmcraid_timestamp_data *timestamp_data;
dma_addr_t timestamp_data_baddr;
/* size of configuration table entry, varies based on the firmware */
u32 config_table_entry_size;
/* Expected toggle bit at host */
u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
/* Wait Q for threads to wait for Reset IOA completion */
wait_queue_head_t reset_wait_q;
struct pmcraid_cmd *reset_cmd;
/* structures for supporting SIGIO based AEN. */
struct fasync_struct *aen_queue;
struct mutex aen_queue_lock; /* lock for aen subscribers list */
struct cdev cdev;
struct Scsi_Host *host; /* mid layer interface structure handle */
struct pci_dev *pdev; /* PCI device structure handle */
/* No of Reset IOA retries . IOA marked dead if threshold exceeds */
u8 ioa_reset_attempts;
#define PMCRAID_RESET_ATTEMPTS 3
u8 current_log_level; /* default level for logging IOASC errors */
u8 num_hrrq; /* Number of interrupt vectors allocated */
u8 interrupt_mode; /* current interrupt mode legacy or msix */
dev_t dev; /* Major-Minor numbers for Char device */
/* Used as ISR handler argument */
struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
/* Message id as filled in last fired IOARCB, used to identify HRRQ */
atomic_t last_message_id;
/* configuration table */
struct pmcraid_config_table *cfg_table;
dma_addr_t cfg_table_bus_addr;
/* structures related to command blocks */
struct kmem_cache *cmd_cachep; /* cache for cmd blocks */
struct dma_pool *control_pool; /* pool for control blocks */
char cmd_pool_name[64]; /* name of cmd cache */
char ctl_pool_name[64]; /* name of control cache */
struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
struct list_head free_cmd_pool;
struct list_head pending_cmd_pool;
spinlock_t free_pool_lock; /* free pool lock */
spinlock_t pending_pool_lock; /* pending pool lock */
/* Tasklet to handle deferred processing */
struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
/* Work-queue (Shared) for deferred reset processing */
struct work_struct worker_q;
/* No of IO commands pending with FW */
atomic_t outstanding_cmds;
/* should add/delete resources to mid-layer now ?*/
atomic_t expose_resources;
u32 ioa_state:4; /* For IOA Reset sequence FSM */
#define IOA_STATE_OPERATIONAL 0x0
#define IOA_STATE_UNKNOWN 0x1
#define IOA_STATE_DEAD 0x2
#define IOA_STATE_IN_SOFT_RESET 0x3
#define IOA_STATE_IN_HARD_RESET 0x4
#define IOA_STATE_IN_RESET_ALERT 0x5
#define IOA_STATE_IN_BRINGDOWN 0x6
#define IOA_STATE_IN_BRINGUP 0x7
u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
u32 ioa_hard_reset:1; /* TRUE if Hard Reset is needed */
u32 ioa_unit_check:1; /* Indicates Unit Check condition */
u32 ioa_bringdown:1; /* whether IOA needs to be brought down */
u32 force_ioa_reset:1; /* force adapter reset ? */
u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
u32 ioa_shutdown_type:2;/* shutdown type used during reset */
#define SHUTDOWN_NONE 0x0
#define SHUTDOWN_NORMAL 0x1
#define SHUTDOWN_ABBREV 0x2
u32 timestamp_error:1; /* indicate set timestamp for out of sync */
};
/* LLD maintained resource entry structure */
struct pmcraid_resource_entry {
struct list_head queue; /* link to "to be exposed" resources */
union {
struct pmcraid_config_table_entry cfg_entry;
struct pmcraid_config_table_entry_ext cfg_entry_ext;
};
struct scsi_device *scsi_dev; /* Link scsi_device structure */
atomic_t read_failures; /* count of failed READ commands */
atomic_t write_failures; /* count of failed WRITE commands */
/* To indicate add/delete/modify during CCN */
u8 change_detected;
#define RES_CHANGE_ADD 0x1 /* add this to mid-layer */
#define RES_CHANGE_DEL 0x2 /* remove this from mid-layer */
u8 reset_progress; /* Device is resetting */
/*
* When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
* flag will be set, mid layer will be asked to retry. In the next
* attempt, this flag will be checked in queuecommand() to set
* SYNC_COMPLETE flag in IOARCB (flag_0).
*/
u8 sync_reqd;
/* target indicates the mapped target_id assigned to this resource if
* this is VSET resource. For non-VSET resources this will be un-used
* or zero
*/
u8 target;
};
/* Data structures used in IOASC error code logging */
struct pmcraid_ioasc_error {
u32 ioasc_code; /* IOASC code */
u8 log_level; /* default log level assignment. */
char *error_string;
};
/* Initial log_level assignments for various IOASCs */
#define IOASC_LOG_LEVEL_NONE 0x0 /* no logging */
#define IOASC_LOG_LEVEL_MUST 0x1 /* must log: all high-severity errors */
#define IOASC_LOG_LEVEL_HARD 0x2 /* optional – low severity errors */
/* Error information maintained by LLD. LLD initializes the pmcraid_error_table
* statically.
*/
static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
{0x01180600, IOASC_LOG_LEVEL_HARD,
"Recovered Error, soft media error, sector reassignment suggested"},
{0x015D0000, IOASC_LOG_LEVEL_HARD,
"Recovered Error, failure prediction threshold exceeded"},
{0x015D9200, IOASC_LOG_LEVEL_HARD,
"Recovered Error, soft Cache Card Battery error threshold"},
{0x015D9200, IOASC_LOG_LEVEL_HARD,
"Recovered Error, soft Cache Card Battery error threshold"},
{0x02048000, IOASC_LOG_LEVEL_HARD,
"Not Ready, IOA Reset Required"},
{0x02408500, IOASC_LOG_LEVEL_HARD,
"Not Ready, IOA microcode download required"},
{0x03110B00, IOASC_LOG_LEVEL_HARD,
"Medium Error, data unreadable, reassignment suggested"},
{0x03110C00, IOASC_LOG_LEVEL_MUST,
"Medium Error, data unreadable do not reassign"},
{0x03310000, IOASC_LOG_LEVEL_HARD,
"Medium Error, media corrupted"},
{0x04050000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA can't communicate with device"},
{0x04080000, IOASC_LOG_LEVEL_MUST,
"Hardware Error, device bus error"},
{0x04088000, IOASC_LOG_LEVEL_MUST,
"Hardware Error, device bus is not functioning"},
{0x04118000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA reserved area data check"},
{0x04118100, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA reserved area invalid data pattern"},
{0x04118200, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA reserved area LRC error"},
{0x04320000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, reassignment space exhausted"},
{0x04330000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, data transfer underlength error"},
{0x04330000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, data transfer overlength error"},
{0x04418000, IOASC_LOG_LEVEL_MUST,
"Hardware Error, PCI bus error"},
{0x04440000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, device error"},
{0x04448200, IOASC_LOG_LEVEL_MUST,
"Hardware Error, IOA error"},
{0x04448300, IOASC_LOG_LEVEL_HARD,
"Hardware Error, undefined device response"},
{0x04448400, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA microcode error"},
{0x04448600, IOASC_LOG_LEVEL_HARD,
"Hardware Error, IOA reset required"},
{0x04449200, IOASC_LOG_LEVEL_HARD,
"Hardware Error, hard Cache Fearuee Card Battery error"},
{0x0444A000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, failed device altered"},
{0x0444A200, IOASC_LOG_LEVEL_HARD,
"Hardware Error, data check after reassignment"},
{0x0444A300, IOASC_LOG_LEVEL_HARD,
"Hardware Error, LRC error after reassignment"},
{0x044A0000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, device bus error (msg/cmd phase)"},
{0x04670400, IOASC_LOG_LEVEL_HARD,
"Hardware Error, new device can't be used"},
{0x04678000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, invalid multiadapter configuration"},
{0x04678100, IOASC_LOG_LEVEL_HARD,
"Hardware Error, incorrect connection between enclosures"},
{0x04678200, IOASC_LOG_LEVEL_HARD,
"Hardware Error, connections exceed IOA design limits"},
{0x04678300, IOASC_LOG_LEVEL_HARD,
"Hardware Error, incorrect multipath connection"},
{0x04679000, IOASC_LOG_LEVEL_HARD,
"Hardware Error, command to LUN failed"},
{0x064C8000, IOASC_LOG_LEVEL_HARD,
"Unit Attention, cache exists for missing/failed device"},
{0x06670100, IOASC_LOG_LEVEL_HARD,
"Unit Attention, incompatible exposed mode device"},
{0x06670600, IOASC_LOG_LEVEL_HARD,
"Unit Attention, attachment of logical unit failed"},
{0x06678000, IOASC_LOG_LEVEL_HARD,
"Unit Attention, cables exceed connective design limit"},
{0x06678300, IOASC_LOG_LEVEL_HARD,
"Unit Attention, incomplete multipath connection between" \
"IOA and enclosure"},
{0x06678400, IOASC_LOG_LEVEL_HARD,
"Unit Attention, incomplete multipath connection between" \
"device and enclosure"},
{0x06678500, IOASC_LOG_LEVEL_HARD,
"Unit Attention, incomplete multipath connection between" \
"IOA and remote IOA"},
{0x06678600, IOASC_LOG_LEVEL_HARD,
"Unit Attention, missing remote IOA"},
{0x06679100, IOASC_LOG_LEVEL_HARD,
"Unit Attention, enclosure doesn't support required multipath" \
"function"},
{0x06698200, IOASC_LOG_LEVEL_HARD,
"Unit Attention, corrupt array parity detected on device"},
{0x066B0200, IOASC_LOG_LEVEL_HARD,
"Unit Attention, array exposed"},
{0x066B8200, IOASC_LOG_LEVEL_HARD,
"Unit Attention, exposed array is still protected"},
{0x066B9200, IOASC_LOG_LEVEL_HARD,
"Unit Attention, Multipath redundancy level got worse"},
{0x07270000, IOASC_LOG_LEVEL_HARD,
"Data Protect, device is read/write protected by IOA"},
{0x07278000, IOASC_LOG_LEVEL_HARD,
"Data Protect, IOA doesn't support device attribute"},
{0x07278100, IOASC_LOG_LEVEL_HARD,
"Data Protect, NVRAM mirroring prohibited"},
{0x07278400, IOASC_LOG_LEVEL_HARD,
"Data Protect, array is short 2 or more devices"},
{0x07278600, IOASC_LOG_LEVEL_HARD,
"Data Protect, exposed array is short a required device"},
{0x07278700, IOASC_LOG_LEVEL_HARD,
"Data Protect, array members not at required addresses"},
{0x07278800, IOASC_LOG_LEVEL_HARD,
"Data Protect, exposed mode device resource address conflict"},
{0x07278900, IOASC_LOG_LEVEL_HARD,
"Data Protect, incorrect resource address of exposed mode device"},
{0x07278A00, IOASC_LOG_LEVEL_HARD,
"Data Protect, Array is missing a device and parity is out of sync"},
{0x07278B00, IOASC_LOG_LEVEL_HARD,
"Data Protect, maximum number of arrays already exist"},
{0x07278C00, IOASC_LOG_LEVEL_HARD,
"Data Protect, cannot locate cache data for device"},
{0x07278D00, IOASC_LOG_LEVEL_HARD,
"Data Protect, cache data exits for a changed device"},
{0x07279100, IOASC_LOG_LEVEL_HARD,
"Data Protect, detection of a device requiring format"},
{0x07279200, IOASC_LOG_LEVEL_HARD,
"Data Protect, IOA exceeds maximum number of devices"},
{0x07279600, IOASC_LOG_LEVEL_HARD,
"Data Protect, missing array, volume set is not functional"},
{0x07279700, IOASC_LOG_LEVEL_HARD,
"Data Protect, single device for a volume set"},
{0x07279800, IOASC_LOG_LEVEL_HARD,
"Data Protect, missing multiple devices for a volume set"},
{0x07279900, IOASC_LOG_LEVEL_HARD,
"Data Protect, maximum number of volument sets already exists"},
{0x07279A00, IOASC_LOG_LEVEL_HARD,
"Data Protect, other volume set problem"},
};
/* macros to help in debugging */
#define pmcraid_err(...) \
printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
#define pmcraid_info(...) \
if (pmcraid_debug_log) \
printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
/* check if given command is a SCSI READ or SCSI WRITE command */
#define SCSI_READ_CMD 0x1 /* any of SCSI READ commands */
#define SCSI_WRITE_CMD 0x2 /* any of SCSI WRITE commands */
#define SCSI_CMD_TYPE(opcode) \
({ u8 op = opcode; u8 __type = 0;\
if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
__type = SCSI_READ_CMD;\
else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
op == WRITE_16)\
__type = SCSI_WRITE_CMD;\
__type;\
})
#define IS_SCSI_READ_WRITE(opcode) \
({ u8 __type = SCSI_CMD_TYPE(opcode); \
(__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
})
/*
* pmcraid_ioctl_header - definition of header structure that precedes all the
* buffers given as ioctl arguments.
*
* .signature : always ASCII string, "PMCRAID"
* .reserved : not used
* .buffer_length : length of the buffer following the header
*/
struct pmcraid_ioctl_header {
u8 signature[8];
u32 reserved;
u32 buffer_length;
};
#define PMCRAID_IOCTL_SIGNATURE "PMCRAID"
/*
* pmcraid_passthrough_ioctl_buffer - structure given as argument to
* passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
* 32-byte alignment so, it is necessary to pack this structure to avoid any
* holes between ioctl_header and passthrough buffer
*
* .ioactl_header : ioctl header
* .ioarcb : filled-up ioarcb buffer, driver always reads this buffer
* .ioasa : buffer for ioasa, driver fills this with IOASA from firmware
* .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
* the transfer directions passed in ioarcb.flags0. Contents
* of this buffer are valid only when ioarcb.data_transfer_len
* is not zero.
*/
struct pmcraid_passthrough_ioctl_buffer {
struct pmcraid_ioctl_header ioctl_header;
struct pmcraid_ioarcb ioarcb;
struct pmcraid_ioasa ioasa;
u8 request_buffer[];
} __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
/*
* keys to differentiate between driver handled IOCTLs and passthrough
* IOCTLs passed to IOA. driver determines the ioctl type using macro
* _IOC_TYPE
*/
#define PMCRAID_DRIVER_IOCTL 'D'
#define PMCRAID_PASSTHROUGH_IOCTL 'F'
#define DRV_IOCTL(n, size) \
_IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
#define FMW_IOCTL(n, size) \
_IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL, (n), (size))
/*
* _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
* This is to facilitate applications avoiding un-necessary memory allocations.
* For example, most of driver handled ioctls do not require ioarcb, ioasa.
*/
#define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
/* Driver handled IOCTL command definitions */
#define PMCRAID_IOCTL_RESET_ADAPTER \
DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
/* passthrough/firmware handled commands */
#define PMCRAID_IOCTL_PASSTHROUGH_COMMAND \
FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
#define PMCRAID_IOCTL_DOWNLOAD_MICROCODE \
FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
#endif /* _PMCRAID_H */
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