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 8 enum 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 15 enum 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 24 enum srp_init_msg { 25 INIT_MSG = 1, 26 INIT_COMPLETE_MSG = 2 27 }; 28 29 enum srp_trans_event { 30 UNUSED_FORMAT = 0, 31 PARTNER_FAILED = 1, 32 PARTNER_DEREGISTER = 2, 33 MIGRATED = 6 34 }; 35 36 enum srp_status { 37 HEADER_DESCRIPTOR = 0xF1, 38 PING = 0xF5, 39 PING_RESPONSE = 0xF6 40 }; 41 42 enum srp_mad_version { 43 MAD_VERSION_1 = 1 44 }; 45 46 enum srp_os_type { 47 OS400 = 1, 48 LINUX = 2, 49 AIX = 3, 50 OFW = 4 51 }; 52 53 enum 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 60 enum { 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 67 struct srp_buf { 68 dma_addr_t dma; 69 void *buf; 70 }; 71 72 struct srp_queue { 73 void *pool; 74 void *items; 75 struct kfifo queue; 76 spinlock_t lock; 77 }; 78 79 struct 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 93 struct 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 }; 103 104 struct ibmvscsis_cmd; 105 106 typedef int (srp_rdma_t)(struct ibmvscsis_cmd *, struct scatterlist *, int, 107 struct srp_direct_buf *, int, 108 enum dma_data_direction, unsigned int); 109 int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t); 110 void srp_target_free(struct srp_target *); 111 struct iu_entry *srp_iu_get(struct srp_target *); 112 void srp_iu_put(struct iu_entry *); 113 int srp_transfer_data(struct ibmvscsis_cmd *, struct srp_cmd *, 114 srp_rdma_t, int, int); 115 u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir); 116 int srp_get_desc_table(struct srp_cmd *srp_cmd, enum dma_data_direction *dir, 117 u64 *data_len); 118 static 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