net/bnxt: cache address of doorbell to subsequent access

While creating TX, Rx, CQ rings use cached DB address instead of
getting it from the PCI memory resource.

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
index bdca262..97b0e08 100644 (file)
--- a/drivers/net/bnxt/bnxt.h
+++ b/drivers/net/bnxt/bnxt.h
@@ -208,6 +208,7 @@ struct bnxt {
        struct rte_eth_dev              *eth_dev;
        struct rte_eth_rss_conf         rss_conf;
        struct rte_pci_device           *pdev;
+       void                            *doorbell_base;
 
        uint32_t                flags;
 #define BNXT_FLAG_REGISTERED   (1 << 0)

diff --git a/drivers/net/bnxt/bnxt_cpr.c b/drivers/net/bnxt/bnxt_cpr.c
index 5ac197e..8dde8cc 100644 (file)
--- a/drivers/net/bnxt/bnxt_cpr.c
+++ b/drivers/net/bnxt/bnxt_cpr.c
@@ -144,7 +144,7 @@ int bnxt_alloc_def_cp_ring(struct bnxt *bp)
                                  HWRM_NA_SIGNATURE);
        if (rc)
                goto err_out;
-       cpr->cp_doorbell = bp->pdev->mem_resource[2].addr;
+       cpr->cp_doorbell = (char *)bp->doorbell_base;
        B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
        if (BNXT_PF(bp))
                rc = bnxt_hwrm_func_cfg_def_cp(bp);

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 7632c32..a133114 100644 (file)
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -3095,11 +3095,23 @@ static int bnxt_init_board(struct rte_eth_dev *eth_dev)
                rc = -ENOMEM;
                goto init_err_release;
        }
+
+       if (!pci_dev->mem_resource[2].addr) {
+               PMD_DRV_LOG(ERR,
+                           "Cannot find PCI device BAR 2 address, aborting\n");
+               rc = -ENODEV;
+               goto init_err_release;
+       } else {
+               bp->doorbell_base = (void *)pci_dev->mem_resource[2].addr;
+       }
+
        return 0;
 
 init_err_release:
        if (bp->bar0)
                bp->bar0 = NULL;
+       if (bp->doorbell_base)
+               bp->doorbell_base = NULL;
 
 init_err_disable:
 

diff --git a/drivers/net/bnxt/bnxt_ring.c b/drivers/net/bnxt/bnxt_ring.c
index 478eab4..8e822e1 100644 (file)
--- a/drivers/net/bnxt/bnxt_ring.c
+++ b/drivers/net/bnxt/bnxt_ring.c
@@ -261,7 +261,6 @@ int bnxt_alloc_rings(struct bnxt *bp, uint16_t qidx,
  */
 int bnxt_alloc_hwrm_rings(struct bnxt *bp)
 {
-       struct rte_pci_device *pci_dev = bp->pdev;
        unsigned int i;
        int rc = 0;
 
@@ -283,8 +282,7 @@ int bnxt_alloc_hwrm_rings(struct bnxt *bp)
                                        HWRM_NA_SIGNATURE);
                if (rc)
                        goto err_out;
-               cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
-                   idx * 0x80;
+               cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
                bp->grp_info[i].cp_fw_ring_id = cp_ring->fw_ring_id;
                B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 
@@ -296,8 +294,7 @@ int bnxt_alloc_hwrm_rings(struct bnxt *bp)
                if (rc)
                        goto err_out;
                rxr->rx_prod = 0;
-               rxr->rx_doorbell = (char *)pci_dev->mem_resource[2].addr +
-                   idx * 0x80;
+               rxr->rx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
                bp->grp_info[i].rx_fw_ring_id = ring->fw_ring_id;
                B_RX_DB(rxr->rx_doorbell, rxr->rx_prod);
 
@@ -316,9 +313,7 @@ int bnxt_alloc_hwrm_rings(struct bnxt *bp)
                        goto err_out;
                PMD_DRV_LOG(DEBUG, "Alloc AGG Done!\n");
                rxr->ag_prod = 0;
-               rxr->ag_doorbell =
-                   (char *)pci_dev->mem_resource[2].addr +
-                   map_idx * 0x80;
+               rxr->ag_doorbell = (char *)bp->doorbell_base + map_idx * 0x80;
                bp->grp_info[i].ag_fw_ring_id = ring->fw_ring_id;
                B_RX_DB(rxr->ag_doorbell, rxr->ag_prod);
 
@@ -350,8 +345,7 @@ int bnxt_alloc_hwrm_rings(struct bnxt *bp)
                if (rc)
                        goto err_out;
 
-               cpr->cp_doorbell = (char *)pci_dev->mem_resource[2].addr +
-                   idx * 0x80;
+               cpr->cp_doorbell = (char *)bp->doorbell_base + idx * 0x80;
                B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
 
                /* Tx ring */
@@ -362,8 +356,7 @@ int bnxt_alloc_hwrm_rings(struct bnxt *bp)
                if (rc)
                        goto err_out;
 
-               txr->tx_doorbell = (char *)pci_dev->mem_resource[2].addr +
-                   idx * 0x80;
+               txr->tx_doorbell = (char *)bp->doorbell_base + idx * 0x80;
                txq->index = idx;
        }