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linux-next/drivers/scsi/mvumi.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

558 lines
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Marvell UMI head file
*
* Copyright 2011 Marvell. <jyli@marvell.com>
*/
#ifndef MVUMI_H
#define MVUMI_H
#define MAX_BASE_ADDRESS 6
#define VER_MAJOR 1
#define VER_MINOR 1
#define VER_OEM 0
#define VER_BUILD 1500
#define MV_DRIVER_NAME "mvumi"
#define PCI_DEVICE_ID_MARVELL_MV9143 0x9143
#define PCI_DEVICE_ID_MARVELL_MV9580 0x9580
#define MVUMI_INTERNAL_CMD_WAIT_TIME 45
#define MVUMI_INQUIRY_LENGTH 44
#define MVUMI_INQUIRY_UUID_OFF 36
#define MVUMI_INQUIRY_UUID_LEN 8
#define IS_DMA64 (sizeof(dma_addr_t) == 8)
enum mvumi_qc_result {
MV_QUEUE_COMMAND_RESULT_SENT = 0,
MV_QUEUE_COMMAND_RESULT_NO_RESOURCE,
};
struct mvumi_hw_regs {
/* For CPU */
void *main_int_cause_reg;
void *enpointa_mask_reg;
void *enpointb_mask_reg;
void *rstoutn_en_reg;
void *ctrl_sts_reg;
void *rstoutn_mask_reg;
void *sys_soft_rst_reg;
/* For Doorbell */
void *pciea_to_arm_drbl_reg;
void *arm_to_pciea_drbl_reg;
void *arm_to_pciea_mask_reg;
void *pciea_to_arm_msg0;
void *pciea_to_arm_msg1;
void *arm_to_pciea_msg0;
void *arm_to_pciea_msg1;
/* reset register */
void *reset_request;
void *reset_enable;
/* For Message Unit */
void *inb_list_basel;
void *inb_list_baseh;
void *inb_aval_count_basel;
void *inb_aval_count_baseh;
void *inb_write_pointer;
void *inb_read_pointer;
void *outb_list_basel;
void *outb_list_baseh;
void *outb_copy_basel;
void *outb_copy_baseh;
void *outb_copy_pointer;
void *outb_read_pointer;
void *inb_isr_cause;
void *outb_isr_cause;
void *outb_coal_cfg;
void *outb_coal_timeout;
/* Bit setting for HW */
u32 int_comaout;
u32 int_comaerr;
u32 int_dl_cpu2pciea;
u32 int_mu;
u32 int_drbl_int_mask;
u32 int_main_int_mask;
u32 cl_pointer_toggle;
u32 cl_slot_num_mask;
u32 clic_irq;
u32 clic_in_err;
u32 clic_out_err;
};
struct mvumi_dyn_list_entry {
u32 src_low_addr;
u32 src_high_addr;
u32 if_length;
u32 reserve;
};
#define SCSI_CMD_MARVELL_SPECIFIC 0xE1
#define CDB_CORE_MODULE 0x1
#define CDB_CORE_SHUTDOWN 0xB
enum {
DRBL_HANDSHAKE = 1 << 0,
DRBL_SOFT_RESET = 1 << 1,
DRBL_BUS_CHANGE = 1 << 2,
DRBL_EVENT_NOTIFY = 1 << 3,
DRBL_MU_RESET = 1 << 4,
DRBL_HANDSHAKE_ISR = DRBL_HANDSHAKE,
/*
* Command flag is the flag for the CDB command itself
*/
/* 1-non data; 0-data command */
CMD_FLAG_NON_DATA = 1 << 0,
CMD_FLAG_DMA = 1 << 1,
CMD_FLAG_PIO = 1 << 2,
/* 1-host read data */
CMD_FLAG_DATA_IN = 1 << 3,
/* 1-host write data */
CMD_FLAG_DATA_OUT = 1 << 4,
CMD_FLAG_PRDT_IN_HOST = 1 << 5,
};
#define APICDB0_EVENT 0xF4
#define APICDB1_EVENT_GETEVENT 0
#define APICDB1_HOST_GETEVENT 1
#define MAX_EVENTS_RETURNED 6
#define DEVICE_OFFLINE 0
#define DEVICE_ONLINE 1
struct mvumi_hotplug_event {
u16 size;
u8 dummy[2];
u8 bitmap[];
};
struct mvumi_driver_event {
u32 time_stamp;
u32 sequence_no;
u32 event_id;
u8 severity;
u8 param_count;
u16 device_id;
u32 params[4];
u8 sense_data_length;
u8 Reserved1;
u8 sense_data[30];
};
struct mvumi_event_req {
unsigned char count;
unsigned char reserved[3];
struct mvumi_driver_event events[MAX_EVENTS_RETURNED];
};
struct mvumi_events_wq {
struct work_struct work_q;
struct mvumi_hba *mhba;
unsigned int event;
void *param;
};
#define HS_CAPABILITY_SUPPORT_COMPACT_SG (1U << 4)
#define HS_CAPABILITY_SUPPORT_PRD_HOST (1U << 5)
#define HS_CAPABILITY_SUPPORT_DYN_SRC (1U << 6)
#define HS_CAPABILITY_NEW_PAGE_IO_DEPTH_DEF (1U << 14)
#define MVUMI_MAX_SG_ENTRY 32
#define SGD_EOT (1L << 27)
#define SGD_EOT_CP (1L << 22)
struct mvumi_sgl {
u32 baseaddr_l;
u32 baseaddr_h;
u32 flags;
u32 size;
};
struct mvumi_compact_sgl {
u32 baseaddr_l;
u32 baseaddr_h;
u32 flags;
};
#define GET_COMPACT_SGD_SIZE(sgd) \
((((struct mvumi_compact_sgl *)(sgd))->flags) & 0x3FFFFFL)
#define SET_COMPACT_SGD_SIZE(sgd, sz) do { \
(((struct mvumi_compact_sgl *)(sgd))->flags) &= ~0x3FFFFFL; \
(((struct mvumi_compact_sgl *)(sgd))->flags) |= (sz); \
} while (0)
#define sgd_getsz(_mhba, sgd, sz) do { \
if (_mhba->hba_capability & HS_CAPABILITY_SUPPORT_COMPACT_SG) \
(sz) = GET_COMPACT_SGD_SIZE(sgd); \
else \
(sz) = (sgd)->size; \
} while (0)
#define sgd_setsz(_mhba, sgd, sz) do { \
if (_mhba->hba_capability & HS_CAPABILITY_SUPPORT_COMPACT_SG) \
SET_COMPACT_SGD_SIZE(sgd, sz); \
else \
(sgd)->size = (sz); \
} while (0)
#define sgd_inc(_mhba, sgd) do { \
if (_mhba->hba_capability & HS_CAPABILITY_SUPPORT_COMPACT_SG) \
sgd = (struct mvumi_sgl *)(((unsigned char *) (sgd)) + 12); \
else \
sgd = (struct mvumi_sgl *)(((unsigned char *) (sgd)) + 16); \
} while (0)
struct mvumi_res {
struct list_head entry;
dma_addr_t bus_addr;
void *virt_addr;
unsigned int size;
unsigned short type; /* enum Resource_Type */
};
/* Resource type */
enum resource_type {
RESOURCE_CACHED_MEMORY = 0,
RESOURCE_UNCACHED_MEMORY
};
struct mvumi_sense_data {
u8 error_code:7;
u8 valid:1;
u8 segment_number;
u8 sense_key:4;
u8 reserved:1;
u8 incorrect_length:1;
u8 end_of_media:1;
u8 file_mark:1;
u8 information[4];
u8 additional_sense_length;
u8 command_specific_information[4];
u8 additional_sense_code;
u8 additional_sense_code_qualifier;
u8 field_replaceable_unit_code;
u8 sense_key_specific[3];
};
/* Request initiator must set the status to REQ_STATUS_PENDING. */
#define REQ_STATUS_PENDING 0x80
struct mvumi_cmd {
struct list_head queue_pointer;
struct mvumi_msg_frame *frame;
dma_addr_t frame_phys;
struct scsi_cmnd *scmd;
atomic_t sync_cmd;
void *data_buf;
unsigned short request_id;
unsigned char cmd_status;
};
/*
* the function type of the in bound frame
*/
#define CL_FUN_SCSI_CMD 0x1
struct mvumi_msg_frame {
u16 device_id;
u16 tag;
u8 cmd_flag;
u8 req_function;
u8 cdb_length;
u8 sg_counts;
u32 data_transfer_length;
u16 request_id;
u16 reserved1;
u8 cdb[MAX_COMMAND_SIZE];
u32 payload[1];
};
/*
* the respond flag for data_payload of the out bound frame
*/
#define CL_RSP_FLAG_NODATA 0x0
#define CL_RSP_FLAG_SENSEDATA 0x1
struct mvumi_rsp_frame {
u16 device_id;
u16 tag;
u8 req_status;
u8 rsp_flag; /* Indicates the type of Data_Payload.*/
u16 request_id;
u32 payload[1];
};
struct mvumi_ob_data {
struct list_head list;
unsigned char data[];
};
struct version_info {
u32 ver_major;
u32 ver_minor;
u32 ver_oem;
u32 ver_build;
};
#define FW_MAX_DELAY 30
#define MVUMI_FW_BUSY (1U << 0)
#define MVUMI_FW_ATTACH (1U << 1)
#define MVUMI_FW_ALLOC (1U << 2)
/*
* State is the state of the MU
*/
#define FW_STATE_IDLE 0
#define FW_STATE_STARTING 1
#define FW_STATE_HANDSHAKING 2
#define FW_STATE_STARTED 3
#define FW_STATE_ABORT 4
#define HANDSHAKE_SIGNATURE 0x5A5A5A5AL
#define HANDSHAKE_READYSTATE 0x55AA5AA5L
#define HANDSHAKE_DONESTATE 0x55AAA55AL
/* HandShake Status definition */
#define HS_STATUS_OK 1
#define HS_STATUS_ERR 2
#define HS_STATUS_INVALID 3
/* HandShake State/Cmd definition */
#define HS_S_START 1
#define HS_S_RESET 2
#define HS_S_PAGE_ADDR 3
#define HS_S_QUERY_PAGE 4
#define HS_S_SEND_PAGE 5
#define HS_S_END 6
#define HS_S_ABORT 7
#define HS_PAGE_VERIFY_SIZE 128
#define HS_GET_STATE(a) (a & 0xFFFF)
#define HS_GET_STATUS(a) ((a & 0xFFFF0000) >> 16)
#define HS_SET_STATE(a, b) (a |= (b & 0xFFFF))
#define HS_SET_STATUS(a, b) (a |= ((b & 0xFFFF) << 16))
/* handshake frame */
struct mvumi_hs_frame {
u16 size;
/* host information */
u8 host_type;
u8 reserved_1[1];
struct version_info host_ver; /* bios or driver version */
/* controller information */
u32 system_io_bus;
u32 slot_number;
u32 intr_level;
u32 intr_vector;
/* communication list configuration */
u32 ib_baseaddr_l;
u32 ib_baseaddr_h;
u32 ob_baseaddr_l;
u32 ob_baseaddr_h;
u8 ib_entry_size;
u8 ob_entry_size;
u8 ob_depth;
u8 ib_depth;
/* system time */
u64 seconds_since1970;
};
struct mvumi_hs_header {
u8 page_code;
u8 checksum;
u16 frame_length;
u32 frame_content[1];
};
/*
* the page code type of the handshake header
*/
#define HS_PAGE_FIRM_CAP 0x1
#define HS_PAGE_HOST_INFO 0x2
#define HS_PAGE_FIRM_CTL 0x3
#define HS_PAGE_CL_INFO 0x4
#define HS_PAGE_TOTAL 0x5
#define HSP_SIZE(i) sizeof(struct mvumi_hs_page##i)
#define HSP_MAX_SIZE ({ \
int size, m1, m2; \
m1 = max(HSP_SIZE(1), HSP_SIZE(3)); \
m2 = max(HSP_SIZE(2), HSP_SIZE(4)); \
size = max(m1, m2); \
size; \
})
/* The format of the page code for Firmware capability */
struct mvumi_hs_page1 {
u8 pagecode;
u8 checksum;
u16 frame_length;
u16 number_of_ports;
u16 max_devices_support;
u16 max_io_support;
u16 umi_ver;
u32 max_transfer_size;
struct version_info fw_ver;
u8 cl_in_max_entry_size;
u8 cl_out_max_entry_size;
u8 cl_inout_list_depth;
u8 total_pages;
u16 capability;
u16 reserved1;
};
/* The format of the page code for Host information */
struct mvumi_hs_page2 {
u8 pagecode;
u8 checksum;
u16 frame_length;
u8 host_type;
u8 host_cap;
u8 reserved[2];
struct version_info host_ver;
u32 system_io_bus;
u32 slot_number;
u32 intr_level;
u32 intr_vector;
u64 seconds_since1970;
};
/* The format of the page code for firmware control */
struct mvumi_hs_page3 {
u8 pagecode;
u8 checksum;
u16 frame_length;
u16 control;
u8 reserved[2];
u32 host_bufferaddr_l;
u32 host_bufferaddr_h;
u32 host_eventaddr_l;
u32 host_eventaddr_h;
};
struct mvumi_hs_page4 {
u8 pagecode;
u8 checksum;
u16 frame_length;
u32 ib_baseaddr_l;
u32 ib_baseaddr_h;
u32 ob_baseaddr_l;
u32 ob_baseaddr_h;
u8 ib_entry_size;
u8 ob_entry_size;
u8 ob_depth;
u8 ib_depth;
};
struct mvumi_tag {
unsigned short *stack;
unsigned short top;
unsigned short size;
};
struct mvumi_device {
struct list_head list;
struct scsi_device *sdev;
u64 wwid;
u8 dev_type;
int id;
};
struct mvumi_hba {
void *base_addr[MAX_BASE_ADDRESS];
u32 pci_base[MAX_BASE_ADDRESS];
void *mmio;
struct list_head cmd_pool;
struct Scsi_Host *shost;
wait_queue_head_t int_cmd_wait_q;
struct pci_dev *pdev;
unsigned int unique_id;
atomic_t fw_outstanding;
struct mvumi_instance_template *instancet;
void *ib_list;
dma_addr_t ib_list_phys;
void *ib_frame;
dma_addr_t ib_frame_phys;
void *ob_list;
dma_addr_t ob_list_phys;
void *ib_shadow;
dma_addr_t ib_shadow_phys;
void *ob_shadow;
dma_addr_t ob_shadow_phys;
void *handshake_page;
dma_addr_t handshake_page_phys;
unsigned int global_isr;
unsigned int isr_status;
unsigned short max_sge;
unsigned short max_target_id;
unsigned char *target_map;
unsigned int max_io;
unsigned int list_num_io;
unsigned int ib_max_size;
unsigned int ob_max_size;
unsigned int ib_max_size_setting;
unsigned int ob_max_size_setting;
unsigned int max_transfer_size;
unsigned char hba_total_pages;
unsigned char fw_flag;
unsigned char request_id_enabled;
unsigned char eot_flag;
unsigned short hba_capability;
unsigned short io_seq;
unsigned int ib_cur_slot;
unsigned int ob_cur_slot;
unsigned int fw_state;
struct mutex sas_discovery_mutex;
struct list_head ob_data_list;
struct list_head free_ob_list;
struct list_head res_list;
struct list_head waiting_req_list;
struct mvumi_tag tag_pool;
struct mvumi_cmd **tag_cmd;
struct mvumi_hw_regs *regs;
struct mutex device_lock;
struct list_head mhba_dev_list;
struct list_head shost_dev_list;
struct task_struct *dm_thread;
atomic_t pnp_count;
};
struct mvumi_instance_template {
void (*fire_cmd) (struct mvumi_hba *, struct mvumi_cmd *);
void (*enable_intr) (struct mvumi_hba *);
void (*disable_intr) (struct mvumi_hba *);
int (*clear_intr) (void *);
unsigned int (*read_fw_status_reg) (struct mvumi_hba *);
unsigned int (*check_ib_list) (struct mvumi_hba *);
int (*check_ob_list) (struct mvumi_hba *, unsigned int *,
unsigned int *);
int (*reset_host) (struct mvumi_hba *);
};
extern struct timezone sys_tz;
#endif
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