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linux_dsm_epyc7002/drivers/scsi/pmcraid.h
Gustavo A. R. Silva 5febf6d6ae scsi: Replace zero-length array with flexible-array member 
The current codebase makes use of the zero-length array language extension
to the C90 standard, but the preferred mechanism to declare variable-length
types such as these ones is a flexible array member[1][2], introduced in
C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning in
case the flexible array does not occur last in the structure, which will
help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by this
change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")

Link: https://lore.kernel.org/r/20200224161406.GA21454@embeddedor
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-03-11 23:07:56 -04:00

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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;
} __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
/* 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[1];
} __attribute__ ((packed));
/*
* 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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