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Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h97
1 files changed, 47 insertions, 50 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 9d529cae1f0..036934cdcb9 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -102,9 +102,9 @@
#define ISER_MAX_TX_MISC_PDUS 6 /* NOOP_OUT(2), TEXT(1), *
* SCSI_TMFUNC(2), LOGOUT(1) */
-#define ISER_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX + \
- ISER_MAX_RX_MISC_PDUS + \
- ISER_MAX_TX_MISC_PDUS)
+#define ISER_QP_MAX_RECV_DTOS (ISCSI_DEF_XMIT_CMDS_MAX)
+
+#define ISER_MIN_POSTED_RX (ISCSI_DEF_XMIT_CMDS_MAX >> 2)
/* the max TX (send) WR supported by the iSER QP is defined by *
* max_send_wr = T * (1 + D) + C ; D is how many inflight dataouts we expect *
@@ -132,6 +132,12 @@ struct iser_hdr {
__be64 read_va;
} __attribute__((packed));
+/* Constant PDU lengths calculations */
+#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
+
+#define ISER_RECV_DATA_SEG_LEN 128
+#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
+#define ISER_RX_LOGIN_SIZE (ISER_HEADERS_LEN + ISCSI_DEF_MAX_RECV_SEG_LEN)
/* Length of an object name string */
#define ISER_OBJECT_NAME_SIZE 64
@@ -187,51 +193,43 @@ struct iser_regd_buf {
struct iser_mem_reg reg; /* memory registration info */
void *virt_addr;
struct iser_device *device; /* device->device for dma_unmap */
- u64 dma_addr; /* if non zero, addr for dma_unmap */
enum dma_data_direction direction; /* direction for dma_unmap */
unsigned int data_size;
- atomic_t ref_count; /* refcount, freed when dec to 0 */
-};
-
-#define MAX_REGD_BUF_VECTOR_LEN 2
-
-struct iser_dto {
- struct iscsi_iser_task *task;
- struct iser_conn *ib_conn;
- int notify_enable;
-
- /* vector of registered buffers */
- unsigned int regd_vector_len;
- struct iser_regd_buf *regd[MAX_REGD_BUF_VECTOR_LEN];
-
- /* offset into the registered buffer may be specified */
- unsigned int offset[MAX_REGD_BUF_VECTOR_LEN];
-
- /* a smaller size may be specified, if 0, then full size is used */
- unsigned int used_sz[MAX_REGD_BUF_VECTOR_LEN];
};
enum iser_desc_type {
- ISCSI_RX,
ISCSI_TX_CONTROL ,
ISCSI_TX_SCSI_COMMAND,
ISCSI_TX_DATAOUT
};
-struct iser_desc {
+struct iser_tx_desc {
struct iser_hdr iser_header;
struct iscsi_hdr iscsi_header;
- struct iser_regd_buf hdr_regd_buf;
- void *data; /* used by RX & TX_CONTROL */
- struct iser_regd_buf data_regd_buf; /* used by RX & TX_CONTROL */
enum iser_desc_type type;
- struct iser_dto dto;
+ u64 dma_addr;
+ /* sg[0] points to iser/iscsi headers, sg[1] optionally points to either
+ of immediate data, unsolicited data-out or control (login,text) */
+ struct ib_sge tx_sg[2];
+ int num_sge;
};
+#define ISER_RX_PAD_SIZE (256 - (ISER_RX_PAYLOAD_SIZE + \
+ sizeof(u64) + sizeof(struct ib_sge)))
+struct iser_rx_desc {
+ struct iser_hdr iser_header;
+ struct iscsi_hdr iscsi_header;
+ char data[ISER_RECV_DATA_SEG_LEN];
+ u64 dma_addr;
+ struct ib_sge rx_sg;
+ char pad[ISER_RX_PAD_SIZE];
+} __attribute__((packed));
+
struct iser_device {
struct ib_device *ib_device;
struct ib_pd *pd;
- struct ib_cq *cq;
+ struct ib_cq *rx_cq;
+ struct ib_cq *tx_cq;
struct ib_mr *mr;
struct tasklet_struct cq_tasklet;
struct list_head ig_list; /* entry in ig devices list */
@@ -250,15 +248,18 @@ struct iser_conn {
struct ib_fmr_pool *fmr_pool; /* pool of IB FMRs */
int disc_evt_flag; /* disconn event delivered */
wait_queue_head_t wait; /* waitq for conn/disconn */
- atomic_t post_recv_buf_count; /* posted rx count */
+ int post_recv_buf_count; /* posted rx count */
atomic_t post_send_buf_count; /* posted tx count */
- atomic_t unexpected_pdu_count;/* count of received *
- * unexpected pdus *
- * not yet retired */
char name[ISER_OBJECT_NAME_SIZE];
struct iser_page_vec *page_vec; /* represents SG to fmr maps*
* maps serialized as tx is*/
struct list_head conn_list; /* entry in ig conn list */
+
+ char *login_buf;
+ u64 login_dma;
+ unsigned int rx_desc_head;
+ struct iser_rx_desc *rx_descs;
+ struct ib_recv_wr rx_wr[ISER_MIN_POSTED_RX];
};
struct iscsi_iser_conn {
@@ -267,7 +268,7 @@ struct iscsi_iser_conn {
};
struct iscsi_iser_task {
- struct iser_desc desc;
+ struct iser_tx_desc desc;
struct iscsi_iser_conn *iser_conn;
enum iser_task_status status;
int command_sent; /* set if command sent */
@@ -275,6 +276,7 @@ struct iscsi_iser_task {
struct iser_regd_buf rdma_regd[ISER_DIRS_NUM];/* regd rdma buf */
struct iser_data_buf data[ISER_DIRS_NUM]; /* orig. data des*/
struct iser_data_buf data_copy[ISER_DIRS_NUM];/* contig. copy */
+ int headers_initialized;
};
struct iser_page_vec {
@@ -322,22 +324,17 @@ void iser_conn_put(struct iser_conn *ib_conn);
void iser_conn_terminate(struct iser_conn *ib_conn);
-void iser_rcv_completion(struct iser_desc *desc,
- unsigned long dto_xfer_len);
+void iser_rcv_completion(struct iser_rx_desc *desc,
+ unsigned long dto_xfer_len,
+ struct iser_conn *ib_conn);
-void iser_snd_completion(struct iser_desc *desc);
+void iser_snd_completion(struct iser_tx_desc *desc, struct iser_conn *ib_conn);
void iser_task_rdma_init(struct iscsi_iser_task *task);
void iser_task_rdma_finalize(struct iscsi_iser_task *task);
-void iser_dto_buffs_release(struct iser_dto *dto);
-
-int iser_regd_buff_release(struct iser_regd_buf *regd_buf);
-
-void iser_reg_single(struct iser_device *device,
- struct iser_regd_buf *regd_buf,
- enum dma_data_direction direction);
+void iser_free_rx_descriptors(struct iser_conn *ib_conn);
void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_task *task,
enum iser_data_dir cmd_dir);
@@ -356,11 +353,9 @@ int iser_reg_page_vec(struct iser_conn *ib_conn,
void iser_unreg_mem(struct iser_mem_reg *mem_reg);
-int iser_post_recv(struct iser_desc *rx_desc);
-int iser_post_send(struct iser_desc *tx_desc);
-
-int iser_conn_state_comp(struct iser_conn *ib_conn,
- enum iser_ib_conn_state comp);
+int iser_post_recvl(struct iser_conn *ib_conn);
+int iser_post_recvm(struct iser_conn *ib_conn, int count);
+int iser_post_send(struct iser_conn *ib_conn, struct iser_tx_desc *tx_desc);
int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
struct iser_data_buf *data,
@@ -368,4 +363,6 @@ int iser_dma_map_task_data(struct iscsi_iser_task *iser_task,
enum dma_data_direction dma_dir);
void iser_dma_unmap_task_data(struct iscsi_iser_task *iser_task);
+int iser_initialize_task_headers(struct iscsi_task *task,
+ struct iser_tx_desc *tx_desc);
#endif