LXR linux/drivers/scsi/ibmvscsi

   1#ifndef __LIBSRP_H__
   2#define __LIBSRP_H__
   3
   4#include <linux/list.h>
   5#include <linux/kfifo.h>
   6#include <scsi/srp.h>
   7
   8enum srp_valid {
   9        INVALIDATE_CMD_RESP_EL = 0,
  10        VALID_CMD_RESP_EL = 0x80,
  11        VALID_INIT_MSG = 0xC0,
  12        VALID_TRANS_EVENT = 0xFF
  13};
  14
  15enum srp_format {
  16        SRP_FORMAT = 1,
  17        MAD_FORMAT = 2,
  18        OS400_FORMAT = 3,
  19        AIX_FORMAT = 4,
  20        LINUX_FORMAT = 5,
  21        MESSAGE_IN_CRQ = 6
  22};
  23
  24enum srp_init_msg {
  25        INIT_MSG = 1,
  26        INIT_COMPLETE_MSG = 2
  27};
  28
  29enum srp_trans_event {
  30        UNUSED_FORMAT = 0,
  31        PARTNER_FAILED = 1,
  32        PARTNER_DEREGISTER = 2,
  33        MIGRATED = 6
  34};
  35
  36enum srp_status {
  37        HEADER_DESCRIPTOR = 0xF1,
  38        PING = 0xF5,
  39        PING_RESPONSE = 0xF6
  40};
  41
  42enum srp_mad_version {
  43        MAD_VERSION_1 = 1
  44};
  45
  46enum srp_os_type {
  47        OS400 = 1,
  48        LINUX = 2,
  49        AIX = 3,
  50        OFW = 4
  51};
  52
  53enum srp_task_attributes {
  54        SRP_SIMPLE_TASK = 0,
  55        SRP_HEAD_TASK = 1,
  56        SRP_ORDERED_TASK = 2,
  57        SRP_ACA_TASK = 4
  58};
  59
  60enum {
  61        SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE           = 0,
  62        SRP_REQUEST_FIELDS_INVALID                      = 2,
  63        SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED      = 4,
  64        SRP_TASK_MANAGEMENT_FUNCTION_FAILED             = 5
  65};
  66
  67struct srp_buf {
  68        dma_addr_t dma;
  69        void *buf;
  70};
  71
  72struct srp_queue {
  73        void *pool;
  74        void *items;
  75        struct kfifo queue;
  76        spinlock_t lock;
  77};
  78
  79struct srp_target {
  80        struct device *dev;
  81
  82        spinlock_t lock;
  83        struct list_head cmd_queue;
  84
  85        size_t srp_iu_size;
  86        struct srp_queue iu_queue;
  87        size_t rx_ring_size;
  88        struct srp_buf **rx_ring;
  89
  90        void *ldata;
  91};
  92
  93struct iu_entry {
  94        struct srp_target *target;
  95
  96        struct list_head ilist;
  97        dma_addr_t remote_token;
  98        unsigned long flags;
  99
 100        struct srp_buf *sbuf;
 101        u16 iu_len;
 102};
 103
 104struct ibmvscsis_cmd;
 105
 106typedef int (srp_rdma_t)(struct ibmvscsis_cmd *, struct scatterlist *, int,
 107                         struct srp_direct_buf *, int,
 108                         enum dma_data_direction, unsigned int);
 109int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
 110void srp_target_free(struct srp_target *);
 111struct iu_entry *srp_iu_get(struct srp_target *);
 112void srp_iu_put(struct iu_entry *);
 113int srp_transfer_data(struct ibmvscsis_cmd *, struct srp_cmd *,
 114                      srp_rdma_t, int, int);
 115u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir);
 116int srp_get_desc_table(struct srp_cmd *srp_cmd, enum dma_data_direction *dir,
 117                       u64 *data_len);
 118static inline int srp_cmd_direction(struct srp_cmd *cmd)
 119{
 120        return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 121}
 122
 123#endif
 124