Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
Bryant G. Ly | 88a678b | 2016-06-28 17:05:35 -0500 | [diff] [blame] | 2 | #ifndef __LIBSRP_H__ |
| 3 | #define __LIBSRP_H__ |
| 4 | |
| 5 | #include <linux/list.h> |
| 6 | #include <linux/kfifo.h> |
| 7 | #include <scsi/srp.h> |
| 8 | |
| 9 | enum srp_valid { |
| 10 | INVALIDATE_CMD_RESP_EL = 0, |
| 11 | VALID_CMD_RESP_EL = 0x80, |
| 12 | VALID_INIT_MSG = 0xC0, |
| 13 | VALID_TRANS_EVENT = 0xFF |
| 14 | }; |
| 15 | |
| 16 | enum srp_format { |
| 17 | SRP_FORMAT = 1, |
| 18 | MAD_FORMAT = 2, |
| 19 | OS400_FORMAT = 3, |
| 20 | AIX_FORMAT = 4, |
| 21 | LINUX_FORMAT = 5, |
| 22 | MESSAGE_IN_CRQ = 6 |
| 23 | }; |
| 24 | |
| 25 | enum srp_init_msg { |
| 26 | INIT_MSG = 1, |
| 27 | INIT_COMPLETE_MSG = 2 |
| 28 | }; |
| 29 | |
| 30 | enum srp_trans_event { |
| 31 | UNUSED_FORMAT = 0, |
| 32 | PARTNER_FAILED = 1, |
| 33 | PARTNER_DEREGISTER = 2, |
Michael Cyr | 464fd64 | 2017-05-16 17:49:21 -0500 | [diff] [blame] | 34 | MIGRATED = 6, |
| 35 | PREPARE_FOR_SUSPEND = 9, |
| 36 | RESUME_FROM_SUSP = 0xA |
Bryant G. Ly | 88a678b | 2016-06-28 17:05:35 -0500 | [diff] [blame] | 37 | }; |
| 38 | |
| 39 | enum srp_status { |
Michael Cyr | 464fd64 | 2017-05-16 17:49:21 -0500 | [diff] [blame] | 40 | CRQ_ENTRY_OVERWRITTEN = 0x20, |
Bryant G. Ly | 88a678b | 2016-06-28 17:05:35 -0500 | [diff] [blame] | 41 | HEADER_DESCRIPTOR = 0xF1, |
| 42 | PING = 0xF5, |
| 43 | PING_RESPONSE = 0xF6 |
| 44 | }; |
| 45 | |
| 46 | enum srp_mad_version { |
| 47 | MAD_VERSION_1 = 1 |
| 48 | }; |
| 49 | |
| 50 | enum srp_os_type { |
| 51 | OS400 = 1, |
| 52 | LINUX = 2, |
| 53 | AIX = 3, |
| 54 | OFW = 4 |
| 55 | }; |
| 56 | |
| 57 | enum srp_task_attributes { |
| 58 | SRP_SIMPLE_TASK = 0, |
| 59 | SRP_HEAD_TASK = 1, |
| 60 | SRP_ORDERED_TASK = 2, |
| 61 | SRP_ACA_TASK = 4 |
| 62 | }; |
| 63 | |
| 64 | enum { |
| 65 | SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE = 0, |
| 66 | SRP_REQUEST_FIELDS_INVALID = 2, |
| 67 | SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED = 4, |
| 68 | SRP_TASK_MANAGEMENT_FUNCTION_FAILED = 5 |
| 69 | }; |
| 70 | |
| 71 | struct srp_buf { |
| 72 | dma_addr_t dma; |
| 73 | void *buf; |
| 74 | }; |
| 75 | |
| 76 | struct srp_queue { |
| 77 | void *pool; |
| 78 | void *items; |
| 79 | struct kfifo queue; |
| 80 | spinlock_t lock; |
| 81 | }; |
| 82 | |
| 83 | struct srp_target { |
| 84 | struct device *dev; |
| 85 | |
| 86 | spinlock_t lock; |
| 87 | struct list_head cmd_queue; |
| 88 | |
| 89 | size_t srp_iu_size; |
| 90 | struct srp_queue iu_queue; |
| 91 | size_t rx_ring_size; |
| 92 | struct srp_buf **rx_ring; |
| 93 | |
| 94 | void *ldata; |
| 95 | }; |
| 96 | |
| 97 | struct iu_entry { |
| 98 | struct srp_target *target; |
| 99 | |
| 100 | struct list_head ilist; |
| 101 | dma_addr_t remote_token; |
| 102 | unsigned long flags; |
| 103 | |
| 104 | struct srp_buf *sbuf; |
| 105 | u16 iu_len; |
| 106 | }; |
| 107 | |
| 108 | struct ibmvscsis_cmd; |
| 109 | |
| 110 | typedef int (srp_rdma_t)(struct ibmvscsis_cmd *, struct scatterlist *, int, |
| 111 | struct srp_direct_buf *, int, |
| 112 | enum dma_data_direction, unsigned int); |
| 113 | int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t); |
| 114 | void srp_target_free(struct srp_target *); |
| 115 | struct iu_entry *srp_iu_get(struct srp_target *); |
| 116 | void srp_iu_put(struct iu_entry *); |
| 117 | int srp_transfer_data(struct ibmvscsis_cmd *, struct srp_cmd *, |
| 118 | srp_rdma_t, int, int); |
| 119 | u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir); |
| 120 | int srp_get_desc_table(struct srp_cmd *srp_cmd, enum dma_data_direction *dir, |
| 121 | u64 *data_len); |
| 122 | static inline int srp_cmd_direction(struct srp_cmd *cmd) |
| 123 | { |
| 124 | return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
| 125 | } |
| 126 | |
| 127 | #endif |