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Date: Fri, 13 Mar 2009 17:52:02 -0700
From: Dhananjay Phadke <dhananjay@...xen.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: [patch next 2/6] netxen: add suspend resume support
Detach network interface on PCI suspend and recreate hardware
context after resumes.
Signed-off-by: Dhananjay Phadke <dhananjay@...xen.com>
---
drivers/net/netxen/netxen_nic.h | 1 +
drivers/net/netxen/netxen_nic_hw.c | 17 ++++++
drivers/net/netxen/netxen_nic_main.c | 102 ++++++++++++++++++++++++++++------
3 files changed, 102 insertions(+), 18 deletions(-)
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 6185070..75cb30f 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -1389,6 +1389,7 @@ void netxen_nic_read_w1(struct netxen_adapter *adapter, u32 index, u32 *value);
int netxen_nic_get_board_info(struct netxen_adapter *adapter);
void netxen_nic_get_firmware_info(struct netxen_adapter *adapter);
+int netxen_nic_wol_supported(struct netxen_adapter *adapter);
int netxen_nic_hw_read_wx_128M(struct netxen_adapter *adapter,
ulong off, void *data, int len);
diff --git a/drivers/net/netxen/netxen_nic_hw.c b/drivers/net/netxen/netxen_nic_hw.c
index 8db4ac3..c8faa53 100644
--- a/drivers/net/netxen/netxen_nic_hw.c
+++ b/drivers/net/netxen/netxen_nic_hw.c
@@ -2320,3 +2320,20 @@ void netxen_nic_get_firmware_info(struct netxen_adapter *adapter)
}
}
+int
+netxen_nic_wol_supported(struct netxen_adapter *adapter)
+{
+ u32 wol_cfg;
+
+ if (NX_IS_REVISION_P2(adapter->ahw.revision_id))
+ return 0;
+
+ wol_cfg = netxen_nic_reg_read(adapter, NETXEN_WOL_CONFIG_NV);
+ if (wol_cfg & (1UL << adapter->portnum)) {
+ wol_cfg = netxen_nic_reg_read(adapter, NETXEN_WOL_CONFIG);
+ if (wol_cfg & (1 << adapter->portnum))
+ return 1;
+ }
+
+ return 0;
+}
diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 9445277..555b459 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -643,6 +643,18 @@ netxen_start_firmware(struct netxen_adapter *adapter)
int val, err, first_boot;
struct pci_dev *pdev = adapter->pdev;
+ int first_driver = 0;
+ if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) {
+ if (adapter->ahw.pci_func == 0)
+ first_driver = 1;
+ } else {
+ if (adapter->portnum == 0)
+ first_driver = 1;
+ }
+
+ if (!first_driver)
+ return 0;
+
first_boot = adapter->pci_read_normalize(adapter,
NETXEN_CAM_RAM(0x1fc));
@@ -859,7 +871,6 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
struct net_device *netdev = NULL;
struct netxen_adapter *adapter = NULL;
int i = 0, err;
- int first_driver;
int pci_func_id = PCI_FUNC(pdev->devfn);
uint8_t revision_id;
@@ -978,20 +989,9 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
*/
netxen_check_options(adapter);
- first_driver = 0;
- if (NX_IS_REVISION_P3(revision_id)) {
- if (adapter->ahw.pci_func == 0)
- first_driver = 1;
- } else {
- if (adapter->portnum == 0)
- first_driver = 1;
- }
-
- if (first_driver) {
- err = netxen_start_firmware(adapter);
- if (err)
- goto err_out_iounmap;
- }
+ err = netxen_start_firmware(adapter);
+ if (err)
+ goto err_out_iounmap;
nx_update_dma_mask(adapter);
@@ -1062,8 +1062,7 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err_out_disable_msi:
netxen_teardown_intr(adapter);
- if (first_driver)
- netxen_free_adapter_offload(adapter);
+ netxen_free_adapter_offload(adapter);
err_out_iounmap:
netxen_cleanup_pci_map(adapter);
@@ -1114,6 +1113,71 @@ static void __devexit netxen_nic_remove(struct pci_dev *pdev)
free_netdev(netdev);
}
+static int
+netxen_nic_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+
+ struct netxen_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+
+ netif_device_detach(netdev);
+
+ if (netif_running(netdev))
+ netxen_nic_down(adapter, netdev);
+
+ if (adapter->is_up == NETXEN_ADAPTER_UP_MAGIC)
+ netxen_nic_detach(adapter);
+
+ pci_save_state(pdev);
+
+ if (netxen_nic_wol_supported(adapter)) {
+ pci_enable_wake(pdev, PCI_D3cold, 1);
+ pci_enable_wake(pdev, PCI_D3hot, 1);
+ }
+
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+ return 0;
+}
+
+static int
+netxen_nic_resume(struct pci_dev *pdev)
+{
+ struct netxen_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+ int err;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ err = pci_enable_device(pdev);
+ if (err)
+ return err;
+
+ adapter->curr_window = 255;
+
+ err = netxen_start_firmware(adapter);
+ if (err) {
+ dev_err(&pdev->dev, "failed to start firmware\n");
+ return err;
+ }
+
+ if (netif_running(netdev)) {
+ err = netxen_nic_attach(adapter);
+ if (err)
+ return err;
+
+ err = netxen_nic_up(adapter, netdev);
+ if (err)
+ return err;
+
+ netif_device_attach(netdev);
+ }
+
+ return 0;
+}
+
static int netxen_nic_open(struct net_device *netdev)
{
struct netxen_adapter *adapter = netdev_priv(netdev);
@@ -1649,7 +1713,9 @@ static struct pci_driver netxen_driver = {
.name = netxen_nic_driver_name,
.id_table = netxen_pci_tbl,
.probe = netxen_nic_probe,
- .remove = __devexit_p(netxen_nic_remove)
+ .remove = __devexit_p(netxen_nic_remove),
+ .suspend = netxen_nic_suspend,
+ .resume = netxen_nic_resume
};
/* Driver Registration on NetXen card */
--
1.6.0.2
--
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