bnx2x: Manual setting for MRRS

Allows better debug capabilities if the user wants to force an MRRS value

Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h
index 9834a86..891a58e 100644 (file)
--- a/drivers/net/bnx2x.h
+++ b/drivers/net/bnx2x.h
@@ -864,6 +864,7 @@ struct bnx2x {
 
        int                     pm_cap;
        int                     pcie_cap;
+       int                     mrrs;
 
        struct delayed_work     sp_task;
        struct work_struct      reset_task;

diff --git a/drivers/net/bnx2x_init.h b/drivers/net/bnx2x_init.h
index a6c0b3a..961db49 100644 (file)
--- a/drivers/net/bnx2x_init.h
+++ b/drivers/net/bnx2x_init.h
@@ -572,7 +572,12 @@ static void bnx2x_init_pxp(struct bnx2x *bp)
                             bp->pcie_cap + PCI_EXP_DEVCTL, &devctl);
        DP(NETIF_MSG_HW, "read 0x%x from devctl\n", devctl);
        w_order = ((devctl & PCI_EXP_DEVCTL_PAYLOAD) >> 5);
-       r_order = ((devctl & PCI_EXP_DEVCTL_READRQ) >> 12);
+       if (bp->mrrs == -1)
+               r_order = ((devctl & PCI_EXP_DEVCTL_READRQ) >> 12);
+       else {
+               DP(NETIF_MSG_HW, "force read order to %d\n", bp->mrrs);
+               r_order = bp->mrrs;
+       }
 
        if (r_order > MAX_RD_ORD) {
                DP(NETIF_MSG_HW, "read order of %d  order adjusted to %d\n",

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 60a4e94..2e4d64d 100644 (file)
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -88,6 +88,11 @@ module_param(int_mode, int, 0);
 MODULE_PARM_DESC(int_mode, " Force interrupt mode (1 INT#x; 2 MSI)");
 
 module_param(poll, int, 0);
+
+static int mrrs = -1;
+module_param(mrrs, int, 0);
+MODULE_PARM_DESC(mrrs, " Force Max Read Req Size (0..3) (for debug)");
+
 module_param(debug, int, 0);
 MODULE_PARM_DESC(disable_tpa, "disable the TPA (LRO) feature");
 MODULE_PARM_DESC(poll, "use polling (for debug)");
@@ -8160,6 +8165,7 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp)
                bp->dev->features |= NETIF_F_LRO;
        }
 
+       bp->mrrs = mrrs;
 
        bp->tx_ring_size = MAX_TX_AVAIL;
        bp->rx_ring_size = MAX_RX_AVAIL;