net/mlx4: fix HW memory optimizations careless

[dpdk.git] / drivers / net / mlx4 / mlx4_prm.h

diff --git a/drivers/net/mlx4/mlx4_prm.h b/drivers/net/mlx4/mlx4_prm.h
index b0fd982..339831a 100644 (file)
--- a/drivers/net/mlx4/mlx4_prm.h
+++ b/drivers/net/mlx4/mlx4_prm.h
@@ -80,14 +80,14 @@ enum {
 
 /* Send queue information. */
 struct mlx4_sq {
-       uint8_t *buf; /**< SQ buffer. */
-       uint8_t *eob; /**< End of SQ buffer */
+       volatile uint8_t *buf; /**< SQ buffer. */
+       volatile uint8_t *eob; /**< End of SQ buffer */
        uint32_t head; /**< SQ head counter in units of TXBBS. */
        uint32_t tail; /**< SQ tail counter in units of TXBBS. */
        uint32_t txbb_cnt; /**< Num of WQEBB in the Q (should be ^2). */
        uint32_t txbb_cnt_mask; /**< txbbs_cnt mask (txbb_cnt is ^2). */
        uint32_t headroom_txbbs; /**< Num of txbbs that should be kept free. */
-       uint32_t *db; /**< Pointer to the doorbell. */
+       volatile uint32_t *db; /**< Pointer to the doorbell. */
        uint32_t doorbell_qpn; /**< qp number to write to the doorbell. */
 };
 
@@ -100,11 +100,11 @@ struct mlx4_sq {
 
 /* Completion queue information. */
 struct mlx4_cq {
-       void *cq_uar; /**< CQ user access region. */
-       void *cq_db_reg; /**< CQ doorbell register. */
-       uint32_t *set_ci_db; /**< Pointer to the completion queue doorbell. */
-       uint32_t *arm_db; /**< Pointer to doorbell for arming Rx events. */
-       uint8_t *buf; /**< Pointer to the completion queue buffer. */
+       volatile void *cq_uar; /**< CQ user access region. */
+       volatile void *cq_db_reg; /**< CQ doorbell register. */
+       volatile uint32_t *set_ci_db; /**< Pointer to the CQ doorbell. */
+       volatile uint32_t *arm_db; /**< Arming Rx events doorbell. */
+       volatile uint8_t *buf; /**< Pointer to the completion queue buffer. */
        uint32_t cqe_cnt; /**< Number of entries in the queue. */
        uint32_t cqe_64:1; /**< CQ entry size is 64 bytes. */
        uint32_t cons_index; /**< Last queue entry that was handled. */
@@ -128,10 +128,10 @@ struct mlx4_cq {
  * @return
  *   Pointer to CQE entry.
  */
-static inline struct mlx4_cqe *
+static inline volatile struct mlx4_cqe *
 mlx4_get_cqe(struct mlx4_cq *cq, uint32_t index)
 {
-       return (struct mlx4_cqe *)(cq->buf +
+       return (volatile struct mlx4_cqe *)(cq->buf +
                                   ((index & (cq->cqe_cnt - 1)) <<
                                    (5 + cq->cqe_64)) +
                                   (cq->cqe_64 << 5));