IB/iser: Chain all iser transaction send work requests

[cascardo/linux.git] / drivers / infiniband / ulp / iser / iscsi_iser.h

diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index 0bdd7e7..86f6583 100644 (file)
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -265,6 +265,14 @@ enum iser_desc_type {
        ISCSI_TX_DATAOUT
 };
 
+/* Maximum number of work requests per task:
+ * Data memory region local invalidate + fast registration
+ * Protection memory region local invalidate + fast registration
+ * Signature memory region local invalidate + fast registration
+ * PDU send
+ */
+#define ISER_MAX_WRS 7
+
 /**
  * struct iser_tx_desc - iSER TX descriptor (for send wr_id)
  *
@@ -277,6 +285,11 @@ enum iser_desc_type {
  *                 unsolicited data-out or control
  * @num_sge:       number sges used on this TX task
  * @mapped:        Is the task header mapped
+ * @wr_idx:        Current WR index
+ * @wrs:           Array of WRs per task
+ * @data_reg:      Data buffer registration details
+ * @prot_reg:      Protection buffer registration details
+ * @sig_attrs:     Signature attributes
  */
 struct iser_tx_desc {
        struct iser_hdr              iser_header;
@@ -286,6 +299,11 @@ struct iser_tx_desc {
        struct ib_sge                tx_sg[2];
        int                          num_sge;
        bool                         mapped;
+       u8                           wr_idx;
+       struct ib_send_wr            wrs[ISER_MAX_WRS];
+       struct iser_mem_reg          data_reg;
+       struct iser_mem_reg          prot_reg;
+       struct ib_sig_attrs          sig_attrs;
 };
 
 #define ISER_RX_PAD_SIZE       (256 - (ISER_RX_PAYLOAD_SIZE + \
@@ -689,4 +707,20 @@ iser_reg_desc_get_fmr(struct ib_conn *ib_conn);
 void
 iser_reg_desc_put_fmr(struct ib_conn *ib_conn,
                      struct iser_fr_desc *desc);
+
+static inline struct ib_send_wr *
+iser_tx_next_wr(struct iser_tx_desc *tx_desc)
+{
+       struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx];
+       struct ib_send_wr *last_wr;
+
+       if (tx_desc->wr_idx) {
+               last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1];
+               last_wr->next = cur_wr;
+       }
+       tx_desc->wr_idx++;
+
+       return cur_wr;
+}
+
 #endif