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bnx2x: Fixed MSI-X enabling flow

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Try to enable less MSI-X vectors if initial request has failed.

Author: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladislav Zolotarov 2010-04-19 01:14:18 +00:00 • committed by David S. Miller
parent dea7aab192
commit 1ac218c83f
2 changed files with 39 additions and 9 deletions
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20
drivers/net/bnx2x.h
View file

@ -24,17 +24,26 @@
#define BCM_VLAN 1 #define BCM_VLAN 1
#endif #endif
#if defined(CONFIG_CNIC) || defined(CONFIG_CNIC_MODULE)
#define BCM_CNIC 1
#include "cnic_if.h"
#endif
#define BNX2X_MULTI_QUEUE #define BNX2X_MULTI_QUEUE
#define BNX2X_NEW_NAPI #define BNX2X_NEW_NAPI
#if defined(CONFIG_CNIC) || defined(CONFIG_CNIC_MODULE)
#define BCM_CNIC 1
#include "cnic_if.h"
#endif
#ifdef BCM_CNIC
#define BNX2X_MIN_MSIX_VEC_CNT 3
#define BNX2X_MSIX_VEC_FP_START 2
#else
#define BNX2X_MIN_MSIX_VEC_CNT 2
#define BNX2X_MSIX_VEC_FP_START 1
#endif
#include <linux/mdio.h> #include <linux/mdio.h>
#include "bnx2x_reg.h" #include "bnx2x_reg.h"
#include "bnx2x_fw_defs.h" #include "bnx2x_fw_defs.h"
@ -862,7 +871,6 @@ struct bnx2x {
#endif #endif
#define INT_MODE_INTx 1 #define INT_MODE_INTx 1
#define INT_MODE_MSI 2 #define INT_MODE_MSI 2
#define INT_MODE_MSIX 3
int tx_ring_size; int tx_ring_size;

28
drivers/net/bnx2x_main.c
View file

@ -7418,7 +7418,31 @@ static int bnx2x_enable_msix(struct bnx2x *bp)
rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc = pci_enable_msix(bp->pdev, &bp->msix_table[0],
BNX2X_NUM_QUEUES(bp) + offset); BNX2X_NUM_QUEUES(bp) + offset);
if (rc) {
/*
* reconfigure number of tx/rx queues according to available
* MSI-X vectors
*/
if (rc >= BNX2X_MIN_MSIX_VEC_CNT) {
/* vectors available for FP */
int fp_vec = rc - BNX2X_MSIX_VEC_FP_START;
DP(NETIF_MSG_IFUP,
"Trying to use less MSI-X vectors: %d\n", rc);
rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], rc);
if (rc) {
DP(NETIF_MSG_IFUP,
"MSI-X is not attainable rc %d\n", rc);
return rc;
}
bp->num_queues = min(bp->num_queues, fp_vec);
DP(NETIF_MSG_IFUP, "New queue configuration set: %d\n",
bp->num_queues);
} else if (rc) {
DP(NETIF_MSG_IFUP, "MSI-X is not attainable rc %d\n", rc); DP(NETIF_MSG_IFUP, "MSI-X is not attainable rc %d\n", rc);
return rc; return rc;
} }
@ -7841,8 +7865,6 @@ static int bnx2x_set_num_queues(struct bnx2x *bp)
bp->num_queues = 1; bp->num_queues = 1;
DP(NETIF_MSG_IFUP, "set number of queues to 1\n"); DP(NETIF_MSG_IFUP, "set number of queues to 1\n");
break; break;
case INT_MODE_MSIX:
default: default:
/* Set number of queues according to bp->multi_mode value */ /* Set number of queues according to bp->multi_mode value */
bnx2x_set_num_queues_msix(bp); bnx2x_set_num_queues_msix(bp);