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-rw-r--r--drivers/scsi/ibmvscsi_tgt/libsrp.h127
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi_tgt/libsrp.h b/drivers/scsi/ibmvscsi_tgt/libsrp.h
new file mode 100644
index 000000000..832606ae2
--- /dev/null
+++ b/drivers/scsi/ibmvscsi_tgt/libsrp.h
@@ -0,0 +1,127 @@
+/* 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