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| /* SPDX-License-Identifier: GPL-2.0 */
| #ifndef __LIBSRP_H__
| #define __LIBSRP_H__
|
| #include <linux/list.h>
| #include <linux/kfifo.h>
| #include <scsi/srp.h>
|
| enum srp_valid {
| INVALIDATE_CMD_RESP_EL = 0,
| VALID_CMD_RESP_EL = 0x80,
| VALID_INIT_MSG = 0xC0,
| VALID_TRANS_EVENT = 0xFF
| };
|
| enum srp_format {
| SRP_FORMAT = 1,
| MAD_FORMAT = 2,
| OS400_FORMAT = 3,
| AIX_FORMAT = 4,
| LINUX_FORMAT = 5,
| MESSAGE_IN_CRQ = 6
| };
|
| enum srp_init_msg {
| INIT_MSG = 1,
| INIT_COMPLETE_MSG = 2
| };
|
| enum srp_trans_event {
| UNUSED_FORMAT = 0,
| PARTNER_FAILED = 1,
| PARTNER_DEREGISTER = 2,
| MIGRATED = 6,
| PREPARE_FOR_SUSPEND = 9,
| RESUME_FROM_SUSP = 0xA
| };
|
| enum srp_status {
| CRQ_ENTRY_OVERWRITTEN = 0x20,
| HEADER_DESCRIPTOR = 0xF1,
| PING = 0xF5,
| PING_RESPONSE = 0xF6
| };
|
| enum srp_mad_version {
| MAD_VERSION_1 = 1
| };
|
| enum srp_os_type {
| OS400 = 1,
| LINUX = 2,
| AIX = 3,
| OFW = 4
| };
|
| enum srp_task_attributes {
| SRP_SIMPLE_TASK = 0,
| SRP_HEAD_TASK = 1,
| SRP_ORDERED_TASK = 2,
| SRP_ACA_TASK = 4
| };
|
| enum {
| SRP_TASK_MANAGEMENT_FUNCTION_COMPLETE = 0,
| SRP_REQUEST_FIELDS_INVALID = 2,
| SRP_TASK_MANAGEMENT_FUNCTION_NOT_SUPPORTED = 4,
| SRP_TASK_MANAGEMENT_FUNCTION_FAILED = 5
| };
|
| struct srp_buf {
| dma_addr_t dma;
| void *buf;
| };
|
| struct srp_queue {
| void *pool;
| void *items;
| struct kfifo queue;
| spinlock_t lock;
| };
|
| struct srp_target {
| struct device *dev;
|
| spinlock_t lock;
| struct list_head cmd_queue;
|
| size_t srp_iu_size;
| struct srp_queue iu_queue;
| size_t rx_ring_size;
| struct srp_buf **rx_ring;
|
| void *ldata;
| };
|
| struct iu_entry {
| struct srp_target *target;
|
| struct list_head ilist;
| dma_addr_t remote_token;
| unsigned long flags;
|
| struct srp_buf *sbuf;
| u16 iu_len;
| };
|
| struct ibmvscsis_cmd;
|
| typedef int (srp_rdma_t)(struct ibmvscsis_cmd *, struct scatterlist *, int,
| struct srp_direct_buf *, int,
| enum dma_data_direction, unsigned int);
| int srp_target_alloc(struct srp_target *, struct device *, size_t, size_t);
| void srp_target_free(struct srp_target *);
| struct iu_entry *srp_iu_get(struct srp_target *);
| void srp_iu_put(struct iu_entry *);
| int srp_transfer_data(struct ibmvscsis_cmd *, struct srp_cmd *,
| srp_rdma_t, int, int);
| u64 srp_data_length(struct srp_cmd *cmd, enum dma_data_direction dir);
| int srp_get_desc_table(struct srp_cmd *srp_cmd, enum dma_data_direction *dir,
| u64 *data_len);
| static inline int srp_cmd_direction(struct srp_cmd *cmd)
| {
| return (cmd->buf_fmt >> 4) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
| }
|
| #endif
|
|
