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Date: Mon, 19 Sep 2011 11:49:52 -0700
From: Rajesh Borundia <rajesh.borundia@...gic.com>
To: David Miller <davem@...emloft.net>
CC: netdev <netdev@...r.kernel.org>,
Ameen Rahman <ameen.rahman@...gic.com>,
Sony Chacko <sony.chacko@...gic.com>
Subject: [PATCH net-next 2/2] netxen: Add pcie workaround
o A performance drop was seen with firmware loaded
from flash. This workaround fixes it.
o Updated driver version to 4.0.77
Signed-off-by: Rajesh Borundia <rajesh.borundia@...gic.com>
---
drivers/net/ethernet/qlogic/netxen/netxen_nic.h | 4 +-
.../net/ethernet/qlogic/netxen/netxen_nic_main.c | 63 +++++++++++++++++++-
2 files changed, 64 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic.h b/drivers/net/ethernet/qlogic/netxen/netxen_nic.h
index 196b660..a876dff 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic.h
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic.h
@@ -53,8 +53,8 @@
#define _NETXEN_NIC_LINUX_MAJOR 4
#define _NETXEN_NIC_LINUX_MINOR 0
-#define _NETXEN_NIC_LINUX_SUBVERSION 76
-#define NETXEN_NIC_LINUX_VERSIONID "4.0.76"
+#define _NETXEN_NIC_LINUX_SUBVERSION 77
+#define NETXEN_NIC_LINUX_VERSIONID "4.0.77"
#define NETXEN_VERSION_CODE(a, b, c) (((a) << 24) + ((b) << 16) + (c))
#define _major(v) (((v) >> 24) & 0xff)
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
index de18e47..82626d6 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
@@ -400,6 +400,63 @@ static void netxen_set_port_mode(struct netxen_adapter *adapter)
}
}
+#define PCI_CAP_ID_GEN 0x10
+
+static void netxen_pcie_strap_init(struct netxen_adapter *adapter)
+{
+ u32 pdevfuncsave;
+ u32 c8c9value = 0;
+ u32 chicken = 0;
+ u32 control = 0;
+ int i, pos;
+ struct pci_dev *pdev;
+
+ pdev = adapter->pdev;
+
+ chicken = NXRD32(adapter, NETXEN_PCIE_REG(PCIE_CHICKEN3));
+ /* clear chicken3.25:24 */
+ chicken &= 0xFCFFFFFF;
+ /*
+ * if gen1 and B0, set F1020 - if gen 2, do nothing
+ * if gen2 set to F1000
+ */
+ pos = pci_find_capability(pdev, PCI_CAP_ID_GEN);
+ if (pos == 0xC0) {
+ pci_read_config_dword(pdev, pos + 0x10, &control);
+ if ((control & 0x000F0000) != 0x00020000) {
+ /* set chicken3.24 if gen1 */
+ chicken |= 0x01000000;
+ }
+ dev_info(&adapter->pdev->dev, "Gen2 strapping detected\n");
+ c8c9value = 0xF1000;
+ } else {
+ /* set chicken3.24 if gen1 */
+ chicken |= 0x01000000;
+ dev_info(&adapter->pdev->dev, "Gen1 strapping detected\n");
+ if (adapter->ahw.revision_id == NX_P3_B0)
+ c8c9value = 0xF1020;
+ else
+ c8c9value = 0;
+ }
+
+ NXWR32(adapter, NETXEN_PCIE_REG(PCIE_CHICKEN3), chicken);
+
+ if (!c8c9value)
+ return;
+
+ pdevfuncsave = pdev->devfn;
+ if (pdevfuncsave & 0x07)
+ return;
+
+ for (i = 0; i < 8; i++) {
+ pci_read_config_dword(pdev, pos + 8, &control);
+ pci_read_config_dword(pdev, pos + 8, &control);
+ pci_write_config_dword(pdev, pos + 8, c8c9value);
+ pdev->devfn++;
+ }
+ pdev->devfn = pdevfuncsave;
+}
+
static void netxen_set_msix_bit(struct pci_dev *pdev, int enable)
{
u32 control;
@@ -867,7 +924,7 @@ netxen_start_firmware(struct netxen_adapter *adapter)
if (err < 0)
goto err_out;
if (err == 0)
- goto wait_init;
+ goto pcie_strap_init;
if (first_boot != 0x55555555) {
NXWR32(adapter, CRB_CMDPEG_STATE, 0);
@@ -910,6 +967,10 @@ netxen_start_firmware(struct netxen_adapter *adapter)
| (_NETXEN_NIC_LINUX_SUBVERSION);
NXWR32(adapter, CRB_DRIVER_VERSION, val);
+pcie_strap_init:
+ if (NX_IS_REVISION_P3(adapter->ahw.revision_id))
+ netxen_pcie_strap_init(adapter);
+
wait_init:
/* Handshake with the card before we register the devices. */
err = netxen_phantom_init(adapter, NETXEN_NIC_PEG_TUNE);
--
1.6.3.3
--
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