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Date: Mon, 4 Oct 2010 06:45:32 -0700
From: Amit Kumar Salecha <amit.salecha@...gic.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, ameen.rahman@...gic.com,
anirban.chakraborty@...gic.com
Subject: [PATCH NEXT 4/9] qlcnic: support quiescent mode
Put device in quiescent mode during internal loopback test.
Before running test, set state to NEED_QUISCENT. After getting
ack from all function, change state to QUISCENT and perform test.
Signed-off-by: Amit Kumar Salecha <amit.salecha@...gic.com>
---
drivers/net/qlcnic/qlcnic.h | 2 +
drivers/net/qlcnic/qlcnic_ethtool.c | 6 +++
drivers/net/qlcnic/qlcnic_main.c | 83 +++++++++++++++++++++++++++-------
3 files changed, 74 insertions(+), 17 deletions(-)
diff --git a/drivers/net/qlcnic/qlcnic.h b/drivers/net/qlcnic/qlcnic.h
index 4667463..6e4150d 100644
--- a/drivers/net/qlcnic/qlcnic.h
+++ b/drivers/net/qlcnic/qlcnic.h
@@ -1302,6 +1302,8 @@ int qlcnic_set_ilb_mode(struct qlcnic_adapter *adapter);
void qlcnic_fetch_mac(struct qlcnic_adapter *, u32, u32, u8, u8 *);
/* Functions from qlcnic_main.c */
+int qlcnic_request_quiscent_mode(struct qlcnic_adapter *adapter);
+void qlcnic_clear_quiscent_mode(struct qlcnic_adapter *adapter);
int qlcnic_reset_context(struct qlcnic_adapter *);
u32 qlcnic_issue_cmd(struct qlcnic_adapter *adapter,
u32 pci_fn, u32 version, u32 arg1, u32 arg2, u32 arg3, u32 cmd);
diff --git a/drivers/net/qlcnic/qlcnic_ethtool.c b/drivers/net/qlcnic/qlcnic_ethtool.c
index 6a76014..0181301 100644
--- a/drivers/net/qlcnic/qlcnic_ethtool.c
+++ b/drivers/net/qlcnic/qlcnic_ethtool.c
@@ -706,6 +706,11 @@ static int qlcnic_loopback_test(struct net_device *netdev)
if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
return -EIO;
+ if (qlcnic_request_quiscent_mode(adapter)) {
+ clear_bit(__QLCNIC_RESETTING, &adapter->state);
+ return -EIO;
+ }
+
ret = qlcnic_diag_alloc_res(netdev, QLCNIC_LOOPBACK_TEST);
if (ret)
goto clear_it;
@@ -722,6 +727,7 @@ done:
qlcnic_diag_free_res(netdev, max_sds_rings);
clear_it:
+ qlcnic_clear_quiscent_mode(adapter);
adapter->max_sds_rings = max_sds_rings;
clear_bit(__QLCNIC_RESETTING, &adapter->state);
return ret;
diff --git a/drivers/net/qlcnic/qlcnic_main.c b/drivers/net/qlcnic/qlcnic_main.c
index a3d7705..33fe4d4 100644
--- a/drivers/net/qlcnic/qlcnic_main.c
+++ b/drivers/net/qlcnic/qlcnic_main.c
@@ -2746,7 +2746,8 @@ qlcnic_fwinit_work(struct work_struct *work)
goto err_ret;
dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
- if (dev_state == QLCNIC_DEV_QUISCENT) {
+ if (dev_state == QLCNIC_DEV_QUISCENT ||
+ dev_state == QLCNIC_DEV_NEED_QUISCENT) {
qlcnic_api_unlock(adapter);
qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
FW_POLL_DELAY * 2);
@@ -2768,18 +2769,6 @@ qlcnic_fwinit_work(struct work_struct *work)
skip_ack_check:
dev_state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
- if (dev_state == QLCNIC_DEV_NEED_QUISCENT) {
- QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
- QLCNIC_DEV_QUISCENT);
- qlcnic_schedule_work(adapter, qlcnic_fwinit_work,
- FW_POLL_DELAY * 2);
- QLCDB(adapter, DRV, "Quiscing the driver\n");
- qlcnic_idc_debug_info(adapter, 0);
-
- qlcnic_api_unlock(adapter);
- return;
- }
-
if (dev_state == QLCNIC_DEV_NEED_RESET) {
QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
QLCNIC_DEV_INITIALIZING);
@@ -2836,7 +2825,12 @@ qlcnic_detach_work(struct work_struct *work)
netif_device_detach(netdev);
- qlcnic_down(adapter, netdev);
+ /* Dont grab rtnl lock during Quiscent mode */
+ if (adapter->dev_state == QLCNIC_DEV_NEED_QUISCENT) {
+ if (netif_running(netdev))
+ __qlcnic_down(adapter, netdev);
+ } else
+ qlcnic_down(adapter, netdev);
status = QLCRD32(adapter, QLCNIC_PEG_HALT_STATUS1);
@@ -2878,6 +2872,61 @@ qlcnic_set_npar_non_operational(struct qlcnic_adapter *adapter)
qlcnic_api_unlock(adapter);
}
+/* Caller should held RESETTING bit.
+ * This should be call in sync with qlcnic_request_quiscent_mode.
+ */
+void qlcnic_clear_quiscent_mode(struct qlcnic_adapter *adapter)
+{
+ qlcnic_clr_drv_state(adapter);
+ qlcnic_api_lock(adapter);
+ QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_READY);
+ qlcnic_api_unlock(adapter);
+}
+
+/* Caller should held RESETTING bit.
+ */
+int qlcnic_request_quiscent_mode(struct qlcnic_adapter *adapter)
+{
+ u8 timeo = adapter->dev_init_timeo / 2;
+ u32 state;
+
+ if (qlcnic_api_lock(adapter))
+ return -EIO;
+
+ state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
+ if (state != QLCNIC_DEV_READY)
+ return -EIO;
+
+ QLCWR32(adapter, QLCNIC_CRB_DEV_STATE, QLCNIC_DEV_NEED_QUISCENT);
+ qlcnic_api_unlock(adapter);
+ QLCDB(adapter, DRV, "NEED QUISCENT state set\n");
+ qlcnic_idc_debug_info(adapter, 0);
+
+ qlcnic_set_drv_state(adapter, QLCNIC_DEV_NEED_QUISCENT);
+
+ do {
+ msleep(2000);
+ state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
+ if (state == QLCNIC_DEV_QUISCENT)
+ return 0;
+ if (!qlcnic_check_drv_state(adapter)) {
+ if (qlcnic_api_lock(adapter))
+ return -EIO;
+ QLCWR32(adapter, QLCNIC_CRB_DEV_STATE,
+ QLCNIC_DEV_QUISCENT);
+ qlcnic_api_unlock(adapter);
+ QLCDB(adapter, DRV, "QUISCENT mode set\n");
+ return 0;
+ }
+ } while (--timeo);
+
+ dev_err(&adapter->pdev->dev, "Failed to quiesce device, DRV_STATE=%08x"
+ " DRV_ACTIVE=%08x\n", QLCRD32(adapter, QLCNIC_CRB_DRV_STATE),
+ QLCRD32(adapter, QLCNIC_CRB_DRV_ACTIVE));
+ qlcnic_clear_quiscent_mode(adapter);
+ return -EIO;
+}
+
/*Transit to RESET state from READY state only */
static void
qlcnic_dev_request_reset(struct qlcnic_adapter *adapter)
@@ -2984,11 +3033,11 @@ qlcnic_check_health(struct qlcnic_adapter *adapter)
qlcnic_dev_request_reset(adapter);
state = QLCRD32(adapter, QLCNIC_CRB_DEV_STATE);
- if (state == QLCNIC_DEV_NEED_RESET ||
- state == QLCNIC_DEV_NEED_QUISCENT) {
+ if (state == QLCNIC_DEV_NEED_RESET) {
qlcnic_set_npar_non_operational(adapter);
adapter->need_fw_reset = 1;
- }
+ } else if (state == QLCNIC_DEV_NEED_QUISCENT)
+ goto detach;
heartbeat = QLCRD32(adapter, QLCNIC_PEG_ALIVE_COUNTER);
if (heartbeat != adapter->heartbeat) {
--
1.6.0.2
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