Move xen patchset to new version's subdir.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.drivers / bnx2x-eeh.patch

From: Yitchak Gertner <gertner@broadcom.com>
Subject: bnx2x: EEH recovery fix
Acked-by: Karsten Keil <kkeil@novell.com>
Reference: bnc#433875


When EEH detects an i/o error it resets the device thus it cannot be accessed.
 In this case the driver needs to unload its interface only with OS, kernel and
 network stack but not with the device.
 After successful recovery, the driver can load normally.
 
 Signed-off-by: Yitchak Gertner <gertner@broadcom.com>
 Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
 Signed-off-by: David S. Miller <davem@davemloft.net>
 

---
 drivers/net/bnx2x_main.c |   95 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 83 insertions(+), 12 deletions(-)

--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -59,8 +59,8 @@
 #include "bnx2x.h"
 #include "bnx2x_init.h"
 
-#define DRV_MODULE_VERSION	"1.45.21"
-#define DRV_MODULE_RELDATE	"2008/09/03"
+#define DRV_MODULE_VERSION	"1.45.22"
+#define DRV_MODULE_RELDATE	"2008/09/09"
 #define BNX2X_BC_VER		0x040200
 
 /* Time in jiffies before concluding the transmitter is hung */
@@ -649,15 +649,16 @@ static void bnx2x_int_disable(struct bnx
 		BNX2X_ERR("BUG! proper val not read from IGU!\n");
 }
 
-static void bnx2x_int_disable_sync(struct bnx2x *bp)
+static void bnx2x_int_disable_sync(struct bnx2x *bp, int disable_hw)
 {
 	int msix = (bp->flags & USING_MSIX_FLAG) ? 1 : 0;
 	int i;
 
 	/* disable interrupt handling */
 	atomic_inc(&bp->intr_sem);
-	/* prevent the HW from sending interrupts */
-	bnx2x_int_disable(bp);
+	if (disable_hw)
+		/* prevent the HW from sending interrupts */
+		bnx2x_int_disable(bp);
 
 	/* make sure all ISRs are done */
 	if (msix) {
@@ -6086,9 +6087,9 @@ static void bnx2x_netif_start(struct bnx
 	}
 }
 
-static void bnx2x_netif_stop(struct bnx2x *bp)
+static void bnx2x_netif_stop(struct bnx2x *bp, int disable_hw)
 {
-	bnx2x_int_disable_sync(bp);
+	bnx2x_int_disable_sync(bp, disable_hw);
 	if (netif_running(bp->dev)) {
 		bnx2x_napi_disable(bp);
 		netif_tx_disable(bp->dev);
@@ -6475,7 +6476,7 @@ load_rings_free:
 	for_each_queue(bp, i)
 		bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
 load_int_disable:
-	bnx2x_int_disable_sync(bp);
+	bnx2x_int_disable_sync(bp, 1);
 	/* Release IRQs */
 	bnx2x_free_irq(bp);
 load_error:
@@ -6651,7 +6652,7 @@ static int bnx2x_nic_unload(struct bnx2x
 	bp->rx_mode = BNX2X_RX_MODE_NONE;
 	bnx2x_set_storm_rx_mode(bp);
 
-	bnx2x_netif_stop(bp);
+	bnx2x_netif_stop(bp, 1);
 	if (!netif_running(bp->dev))
 		bnx2x_napi_disable(bp);
 	del_timer_sync(&bp->timer);
@@ -8796,7 +8797,7 @@ static int bnx2x_test_loopback(struct bn
 	if (!netif_running(bp->dev))
 		return BNX2X_LOOPBACK_FAILED;
 
-	bnx2x_netif_stop(bp);
+	bnx2x_netif_stop(bp, 1);
 
 	if (bnx2x_run_loopback(bp, BNX2X_MAC_LOOPBACK, link_up)) {
 		DP(NETIF_MSG_PROBE, "MAC loopback failed\n");
@@ -10351,6 +10352,74 @@ static int bnx2x_resume(struct pci_dev *
 	return rc;
 }
 
+static int bnx2x_eeh_nic_unload(struct bnx2x *bp)
+{
+	int i;
+
+	bp->state = BNX2X_STATE_ERROR;
+
+	bp->rx_mode = BNX2X_RX_MODE_NONE;
+
+	bnx2x_netif_stop(bp, 0);
+
+	del_timer_sync(&bp->timer);
+	bp->stats_state = STATS_STATE_DISABLED;
+	DP(BNX2X_MSG_STATS, "stats_state - DISABLED\n");
+
+	/* Release IRQs */
+	bnx2x_free_irq(bp);
+
+	if (CHIP_IS_E1(bp)) {
+		struct mac_configuration_cmd *config =
+						bnx2x_sp(bp, mcast_config);
+
+		for (i = 0; i < config->hdr.length_6b; i++)
+			CAM_INVALIDATE(config->config_table[i]);
+	}
+
+	/* Free SKBs, SGEs, TPA pool and driver internals */
+	bnx2x_free_skbs(bp);
+	for_each_queue(bp, i)
+		bnx2x_free_rx_sge_range(bp, bp->fp + i, NUM_RX_SGE);
+	bnx2x_free_mem(bp);
+
+	bp->state = BNX2X_STATE_CLOSED;
+
+	netif_carrier_off(bp->dev);
+
+	return 0;
+}
+
+static void bnx2x_eeh_recover(struct bnx2x *bp)
+{
+	u32 val;
+
+	mutex_init(&bp->port.phy_mutex);
+
+	bp->common.shmem_base = REG_RD(bp, MISC_REG_SHARED_MEM_ADDR);
+	bp->link_params.shmem_base = bp->common.shmem_base;
+	BNX2X_DEV_INFO("shmem offset is 0x%x\n", bp->common.shmem_base);
+
+	if (!bp->common.shmem_base ||
+	    (bp->common.shmem_base < 0xA0000) ||
+	    (bp->common.shmem_base >= 0xC0000)) {
+		BNX2X_DEV_INFO("MCP not active\n");
+		bp->flags |= NO_MCP_FLAG;
+		return;
+	}
+
+	val = SHMEM_RD(bp, validity_map[BP_PORT(bp)]);
+	if ((val & (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
+		!= (SHR_MEM_VALIDITY_DEV_INFO | SHR_MEM_VALIDITY_MB))
+		BNX2X_ERR("BAD MCP validity signature\n");
+
+	if (!BP_NOMCP(bp)) {
+		bp->fw_seq = (SHMEM_RD(bp, func_mb[BP_FUNC(bp)].drv_mb_header)
+			      & DRV_MSG_SEQ_NUMBER_MASK);
+		BNX2X_DEV_INFO("fw_seq 0x%08x\n", bp->fw_seq);
+	}
+}
+
 /**
  * bnx2x_io_error_detected - called when PCI error is detected
  * @pdev: Pointer to PCI device
@@ -10370,7 +10439,7 @@ static pci_ers_result_t bnx2x_io_error_d
 	netif_device_detach(dev);
 
 	if (netif_running(dev))
-		bnx2x_nic_unload(bp, UNLOAD_CLOSE);
+		bnx2x_eeh_nic_unload(bp);
 
 	pci_disable_device(pdev);
 
@@ -10425,8 +10494,10 @@ static void bnx2x_io_resume(struct pci_d
 
 	rtnl_lock();
 
+	bnx2x_eeh_recover(bp);
+
 	if (netif_running(dev))
-		bnx2x_nic_load(bp, LOAD_OPEN);
+		bnx2x_nic_load(bp, LOAD_NORMAL);
 
 	netif_device_attach(dev);