From: John Feeney <jfeeney@redhat.com>
Date: Fri, 22 Oct 2010 15:21:29 -0400
Subject: [net] bnx2: add AER support
Message-id: <4CC1ABF9.7090609@redhat.com>
Patchwork-id: 28899
O-Subject: [RHEL5.6 PATCH] Add AER support to bnx2
Bugzilla: 617024
RH-Acked-by: Prarit Bhargava <prarit@redhat.com>
RH-Acked-by: Don Dutile <ddutile@redhat.com>

bz617024
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=617024
Add AER support to bnx2

Description of problem:
The bnx2 driver was missing the support for AER (Advanced
Error Reporting).

Solution:
This patch adds this support.

Upstream commits:
bnx2: Add PCI Advanced Error Reporting support.
   cd709aa90648195e5b5823fa90eb0b3fb0e78ee4

bnx2: Enable AER on PCIE devices only
   c239f279e571a272c1b32a1e84b8fa037b68f49c

Note: This patch bumped the version number of the bnx2
driver but since most of the patches that constitute
this version are not yet in rhel5, I did not bump the
bnx2 number.

Brew:
Successfully built in Brew for all architectures.

Testing:
HP wants this and so they successfully tested it.
Thanks HP.

Acks would be appreciated. Thanks.

Signed-off-by: Jarod Wilson <jarod@redhat.com>

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 865b525..b465db4 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -47,6 +47,7 @@
 #include <linux/prefetch.h>
 #include <linux/cache.h>
 #include <linux/zlib.h>
+#include <linux/aer.h>
 
 #if defined(CONFIG_CNIC) || defined(CONFIG_CNIC_MODULE)
 #define BCM_CNIC 1
@@ -7938,6 +7939,7 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
 	int rc, i, j;
 	u32 reg;
 	u64 dma_mask, persist_dma_mask;
+	int err;
 
 	SET_MODULE_OWNER(dev);
 	SET_NETDEV_DEV(dev, &pdev->dev);
@@ -7975,7 +7977,6 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
 	}
 
 	pci_set_master(pdev);
-	pci_save_state(pdev);
 
 	bp->pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);
 	if (bp->pm_cap == 0) {
@@ -8030,6 +8031,15 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
 		bp->flags |= BNX2_FLAG_PCIE;
 		if (CHIP_REV(bp) == CHIP_REV_Ax)
 			bp->flags |= BNX2_FLAG_JUMBO_BROKEN;
+
+		/* AER (Advanced Error Reporting) hooks */
+		err = pci_enable_pcie_error_reporting(pdev);
+		if (err) {
+			dev_err(&pdev->dev, "pci_enable_pcie_error_reporting "
+					    "failed 0x%x\n", err);
+			/* non-fatal, continue */
+		}
+
 	} else {
 		bp->pcix_cap = pci_find_capability(pdev, PCI_CAP_ID_PCIX);
 		if (bp->pcix_cap == 0) {
@@ -8288,9 +8298,14 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
 	bp->timer.data = (unsigned long) bp;
 	bp->timer.function = bnx2_timer;
 
+	pci_save_state(pdev);
+
 	return 0;
 
 err_out_unmap:
+	if (bp->flags & BNX2_FLAG_PCIE)
+		pci_disable_pcie_error_reporting(pdev);
+
 	if (bp->regview) {
 		iounmap(bp->regview);
 		bp->regview = NULL;
@@ -8481,7 +8496,11 @@ bnx2_remove_one(struct pci_dev *pdev)
 
 	kfree(bp->temp_stats_blk);
 
+	if (bp->flags & BNX2_FLAG_PCIE)
+		pci_disable_pcie_error_reporting(pdev);
+
 	free_netdev(dev);
+
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
@@ -8573,25 +8592,38 @@ static pci_ers_result_t bnx2_io_slot_reset(struct pci_dev *pdev)
 {
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct bnx2 *bp = netdev_priv(dev);
+	pci_ers_result_t result;
+	int err;
 
 	rtnl_lock();
 	if (pci_enable_device(pdev)) {
 		dev_err(&pdev->dev,
 			"Cannot re-enable PCI device after reset.\n");
-		rtnl_unlock();
-		return PCI_ERS_RESULT_DISCONNECT;
+		result = PCI_ERS_RESULT_DISCONNECT;
+	} else {
+		pci_set_master(pdev);
+		pci_restore_state(pdev);
+		pci_save_state(pdev);
+
+		if (netif_running(dev)) {
+			bnx2_set_power_state(bp, PCI_D0);
+			bnx2_init_nic(bp, 1);
+		}
+		result = PCI_ERS_RESULT_RECOVERED;
 	}
-	pci_set_master(pdev);
-	pci_restore_state(pdev);
-	pci_save_state(pdev);
+	rtnl_unlock();
 
-	if (netif_running(dev)) {
-		bnx2_set_power_state(bp, PCI_D0);
-		bnx2_init_nic(bp, 1);
+	if (!(bp->flags & BNX2_FLAG_PCIE))
+		return result;
+
+	err = pci_cleanup_aer_uncorrect_error_status(pdev);
+	if (err) {
+		dev_err(&pdev->dev,
+			"pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
+			err); /* non-fatal, continue */
 	}
 
-	rtnl_unlock();
-	return PCI_ERS_RESULT_RECOVERED;
+	return result;
 }
 
 /**