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Message-ID: <1490703176-429-2-git-send-email-Yuval.Mintz@cavium.com>
Date: Tue, 28 Mar 2017 15:12:50 +0300
From: Yuval Mintz <Yuval.Mintz@...ium.com>
To: <davem@...emloft.net>, <netdev@...r.kernel.org>
CC: Tomer Tayar <Tomer.Tayar@...ium.com>,
Yuval Mintz <Yuval.Mintz@...ium.com>
Subject: [PATCH net-next 1/7] qed: Correct HW stop flow
From: Tomer Tayar <Tomer.Tayar@...ium.com>
Management firmware is used as arbiter between different PFs
which are loading/unloading, but in order to use the synchronization
it offers the contending configurations need to be applied either
between their LOAD_REQ <-> LOAD_DONE or UNLOAD_REQ <-> UNLOAD_DONE
management firmware commands.
Existing HW stop flow utilizes 2 different functions: qed_hw_stop() and
qed_hw_reset() which don't abide this requirement; Most of the closure
is doing outside the scope of the unload request.
This patch removes qed_hw_reset() and places the relevant stop
functionality underneath the management firmware protection.
Signed-off-by: Tomer Tayar <Tomer.Tayar@...ium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@...ium.com>
---
drivers/net/ethernet/qlogic/qed/qed.h | 1 +
drivers/net/ethernet/qlogic/qed/qed_dev.c | 146 ++++++++++----------------
drivers/net/ethernet/qlogic/qed/qed_dev_api.h | 8 --
drivers/net/ethernet/qlogic/qed/qed_main.c | 29 ++---
drivers/net/ethernet/qlogic/qed/qed_mcp.c | 73 +++++++++----
drivers/net/ethernet/qlogic/qed/qed_mcp.h | 20 ++++
6 files changed, 142 insertions(+), 135 deletions(-)
diff --git a/drivers/net/ethernet/qlogic/qed/qed.h b/drivers/net/ethernet/qlogic/qed/qed.h
index ca30a27..90a1988 100644
--- a/drivers/net/ethernet/qlogic/qed/qed.h
+++ b/drivers/net/ethernet/qlogic/qed/qed.h
@@ -732,5 +732,6 @@ void qed_get_protocol_stats(struct qed_dev *cdev,
enum qed_mcp_protocol_type type,
union qed_mcp_protocol_stats *stats);
int qed_slowpath_irq_req(struct qed_hwfn *hwfn);
+void qed_slowpath_irq_sync(struct qed_hwfn *p_hwfn);
#endif /* _QED_H */
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index 11e45f0..cf95da5 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -1303,27 +1303,53 @@ void qed_hw_timers_stop_all(struct qed_dev *cdev)
int qed_hw_stop(struct qed_dev *cdev)
{
- int rc = 0, t_rc;
+ struct qed_hwfn *p_hwfn;
+ struct qed_ptt *p_ptt;
+ int rc, rc2 = 0;
int j;
for_each_hwfn(cdev, j) {
- struct qed_hwfn *p_hwfn = &cdev->hwfns[j];
- struct qed_ptt *p_ptt = p_hwfn->p_main_ptt;
+ p_hwfn = &cdev->hwfns[j];
+ p_ptt = p_hwfn->p_main_ptt;
DP_VERBOSE(p_hwfn, NETIF_MSG_IFDOWN, "Stopping hw/fw\n");
if (IS_VF(cdev)) {
qed_vf_pf_int_cleanup(p_hwfn);
+ rc = qed_vf_pf_reset(p_hwfn);
+ if (rc) {
+ DP_NOTICE(p_hwfn,
+ "qed_vf_pf_reset failed. rc = %d.\n",
+ rc);
+ rc2 = -EINVAL;
+ }
continue;
}
/* mark the hw as uninitialized... */
p_hwfn->hw_init_done = false;
+ /* Send unload command to MCP */
+ rc = qed_mcp_unload_req(p_hwfn, p_ptt);
+ if (rc) {
+ DP_NOTICE(p_hwfn,
+ "Failed sending a UNLOAD_REQ command. rc = %d.\n",
+ rc);
+ rc2 = -EINVAL;
+ }
+
+ qed_slowpath_irq_sync(p_hwfn);
+
+ /* After this point no MFW attentions are expected, e.g. prevent
+ * race between pf stop and dcbx pf update.
+ */
rc = qed_sp_pf_stop(p_hwfn);
- if (rc)
+ if (rc) {
DP_NOTICE(p_hwfn,
- "Failed to close PF against FW. Continue to stop HW to prevent illegal host access by the device\n");
+ "Failed to close PF against FW [rc = %d]. Continue to stop HW to prevent illegal host access by the device.\n",
+ rc);
+ rc2 = -EINVAL;
+ }
qed_wr(p_hwfn, p_ptt,
NIG_REG_RX_LLH_BRB_GATE_DNTFWD_PERPF, 0x1);
@@ -1346,20 +1372,37 @@ int qed_hw_stop(struct qed_dev *cdev)
/* Need to wait 1ms to guarantee SBs are cleared */
usleep_range(1000, 2000);
+
+ /* Disable PF in HW blocks */
+ qed_wr(p_hwfn, p_ptt, DORQ_REG_PF_DB_ENABLE, 0);
+ qed_wr(p_hwfn, p_ptt, QM_REG_PF_EN, 0);
+
+ qed_mcp_unload_done(p_hwfn, p_ptt);
+ if (rc) {
+ DP_NOTICE(p_hwfn,
+ "Failed sending a UNLOAD_DONE command. rc = %d.\n",
+ rc);
+ rc2 = -EINVAL;
+ }
}
if (IS_PF(cdev)) {
+ p_hwfn = QED_LEADING_HWFN(cdev);
+ p_ptt = QED_LEADING_HWFN(cdev)->p_main_ptt;
+
/* Disable DMAE in PXP - in CMT, this should only be done for
* first hw-function, and only after all transactions have
* stopped for all active hw-functions.
*/
- t_rc = qed_change_pci_hwfn(&cdev->hwfns[0],
- cdev->hwfns[0].p_main_ptt, false);
- if (t_rc != 0)
- rc = t_rc;
+ rc = qed_change_pci_hwfn(p_hwfn, p_ptt, false);
+ if (rc) {
+ DP_NOTICE(p_hwfn,
+ "qed_change_pci_hwfn failed. rc = %d.\n", rc);
+ rc2 = -EINVAL;
+ }
}
- return rc;
+ return rc2;
}
void qed_hw_stop_fastpath(struct qed_dev *cdev)
@@ -1404,89 +1447,6 @@ void qed_hw_start_fastpath(struct qed_hwfn *p_hwfn)
NIG_REG_RX_LLH_BRB_GATE_DNTFWD_PERPF, 0x0);
}
-static int qed_reg_assert(struct qed_hwfn *p_hwfn,
- struct qed_ptt *p_ptt, u32 reg, bool expected)
-{
- u32 assert_val = qed_rd(p_hwfn, p_ptt, reg);
-
- if (assert_val != expected) {
- DP_NOTICE(p_hwfn, "Value at address 0x%08x != 0x%08x\n",
- reg, expected);
- return -EINVAL;
- }
-
- return 0;
-}
-
-int qed_hw_reset(struct qed_dev *cdev)
-{
- int rc = 0;
- u32 unload_resp, unload_param;
- u32 wol_param;
- int i;
-
- switch (cdev->wol_config) {
- case QED_OV_WOL_DISABLED:
- wol_param = DRV_MB_PARAM_UNLOAD_WOL_DISABLED;
- break;
- case QED_OV_WOL_ENABLED:
- wol_param = DRV_MB_PARAM_UNLOAD_WOL_ENABLED;
- break;
- default:
- DP_NOTICE(cdev,
- "Unknown WoL configuration %02x\n", cdev->wol_config);
- /* Fallthrough */
- case QED_OV_WOL_DEFAULT:
- wol_param = DRV_MB_PARAM_UNLOAD_WOL_MCP;
- }
-
- for_each_hwfn(cdev, i) {
- struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
-
- if (IS_VF(cdev)) {
- rc = qed_vf_pf_reset(p_hwfn);
- if (rc)
- return rc;
- continue;
- }
-
- DP_VERBOSE(p_hwfn, NETIF_MSG_IFDOWN, "Resetting hw/fw\n");
-
- /* Check for incorrect states */
- qed_reg_assert(p_hwfn, p_hwfn->p_main_ptt,
- QM_REG_USG_CNT_PF_TX, 0);
- qed_reg_assert(p_hwfn, p_hwfn->p_main_ptt,
- QM_REG_USG_CNT_PF_OTHER, 0);
-
- /* Disable PF in HW blocks */
- qed_wr(p_hwfn, p_hwfn->p_main_ptt, DORQ_REG_PF_DB_ENABLE, 0);
- qed_wr(p_hwfn, p_hwfn->p_main_ptt, QM_REG_PF_EN, 0);
- qed_wr(p_hwfn, p_hwfn->p_main_ptt,
- TCFC_REG_STRONG_ENABLE_PF, 0);
- qed_wr(p_hwfn, p_hwfn->p_main_ptt,
- CCFC_REG_STRONG_ENABLE_PF, 0);
-
- /* Send unload command to MCP */
- rc = qed_mcp_cmd(p_hwfn, p_hwfn->p_main_ptt,
- DRV_MSG_CODE_UNLOAD_REQ, wol_param,
- &unload_resp, &unload_param);
- if (rc) {
- DP_NOTICE(p_hwfn, "qed_hw_reset: UNLOAD_REQ failed\n");
- unload_resp = FW_MSG_CODE_DRV_UNLOAD_ENGINE;
- }
-
- rc = qed_mcp_cmd(p_hwfn, p_hwfn->p_main_ptt,
- DRV_MSG_CODE_UNLOAD_DONE,
- 0, &unload_resp, &unload_param);
- if (rc) {
- DP_NOTICE(p_hwfn, "qed_hw_reset: UNLOAD_DONE failed\n");
- return rc;
- }
- }
-
- return rc;
-}
-
/* Free hwfn memory and resources acquired in hw_hwfn_prepare */
static void qed_hw_hwfn_free(struct qed_hwfn *p_hwfn)
{
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
index 6812003..e96eccf 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h
@@ -140,14 +140,6 @@ int qed_hw_init(struct qed_dev *cdev,
*/
void qed_hw_start_fastpath(struct qed_hwfn *p_hwfn);
-/**
- * @brief qed_hw_reset -
- *
- * @param cdev
- *
- * @return int
- */
-int qed_hw_reset(struct qed_dev *cdev);
/**
* @brief qed_hw_prepare -
diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c
index 766c6f3..f2ae90a 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -589,6 +589,19 @@ int qed_slowpath_irq_req(struct qed_hwfn *hwfn)
return rc;
}
+void qed_slowpath_irq_sync(struct qed_hwfn *p_hwfn)
+{
+ struct qed_dev *cdev = p_hwfn->cdev;
+ u8 id = p_hwfn->my_id;
+ u32 int_mode;
+
+ int_mode = cdev->int_params.out.int_mode;
+ if (int_mode == QED_INT_MODE_MSIX)
+ synchronize_irq(cdev->int_params.msix_table[id].vector);
+ else
+ synchronize_irq(cdev->pdev->irq);
+}
+
static void qed_slowpath_irq_free(struct qed_dev *cdev)
{
int i;
@@ -631,19 +644,6 @@ static int qed_nic_stop(struct qed_dev *cdev)
return rc;
}
-static int qed_nic_reset(struct qed_dev *cdev)
-{
- int rc;
-
- rc = qed_hw_reset(cdev);
- if (rc)
- return rc;
-
- qed_resc_free(cdev);
-
- return 0;
-}
-
static int qed_nic_setup(struct qed_dev *cdev)
{
int rc, i;
@@ -1043,7 +1043,8 @@ static int qed_slowpath_stop(struct qed_dev *cdev)
}
qed_disable_msix(cdev);
- qed_nic_reset(cdev);
+
+ qed_resc_free(cdev);
qed_iov_wq_stop(cdev, true);
diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index ccea0ea..f2e5ab9 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -550,32 +550,12 @@ int qed_mcp_cmd(struct qed_hwfn *p_hwfn,
u32 *o_mcp_param)
{
struct qed_mcp_mb_params mb_params;
- struct mcp_mac wol_mac;
int rc;
memset(&mb_params, 0, sizeof(mb_params));
mb_params.cmd = cmd;
mb_params.param = param;
- /* In case of UNLOAD_DONE, set the primary MAC */
- if ((cmd == DRV_MSG_CODE_UNLOAD_DONE) &&
- (p_hwfn->cdev->wol_config == QED_OV_WOL_ENABLED)) {
- u8 *p_mac = p_hwfn->cdev->wol_mac;
-
- memset(&wol_mac, 0, sizeof(wol_mac));
- wol_mac.mac_upper = p_mac[0] << 8 | p_mac[1];
- wol_mac.mac_lower = p_mac[2] << 24 | p_mac[3] << 16 |
- p_mac[4] << 8 | p_mac[5];
-
- DP_VERBOSE(p_hwfn,
- (QED_MSG_SP | NETIF_MSG_IFDOWN),
- "Setting WoL MAC: %pM --> [%08x,%08x]\n",
- p_mac, wol_mac.mac_upper, wol_mac.mac_lower);
-
- mb_params.p_data_src = &wol_mac;
- mb_params.data_src_size = sizeof(wol_mac);
- }
-
rc = qed_mcp_cmd_and_union(p_hwfn, p_ptt, &mb_params);
if (rc)
return rc;
@@ -663,6 +643,59 @@ int qed_mcp_load_req(struct qed_hwfn *p_hwfn,
return 0;
}
+int qed_mcp_unload_req(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+ u32 wol_param, mcp_resp, mcp_param;
+
+ switch (p_hwfn->cdev->wol_config) {
+ case QED_OV_WOL_DISABLED:
+ wol_param = DRV_MB_PARAM_UNLOAD_WOL_DISABLED;
+ break;
+ case QED_OV_WOL_ENABLED:
+ wol_param = DRV_MB_PARAM_UNLOAD_WOL_ENABLED;
+ break;
+ default:
+ DP_NOTICE(p_hwfn,
+ "Unknown WoL configuration %02x\n",
+ p_hwfn->cdev->wol_config);
+ /* Fallthrough */
+ case QED_OV_WOL_DEFAULT:
+ wol_param = DRV_MB_PARAM_UNLOAD_WOL_MCP;
+ }
+
+ return qed_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_UNLOAD_REQ, wol_param,
+ &mcp_resp, &mcp_param);
+}
+
+int qed_mcp_unload_done(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
+{
+ struct qed_mcp_mb_params mb_params;
+ struct mcp_mac wol_mac;
+
+ memset(&mb_params, 0, sizeof(mb_params));
+ mb_params.cmd = DRV_MSG_CODE_UNLOAD_DONE;
+
+ /* Set the primary MAC if WoL is enabled */
+ if (p_hwfn->cdev->wol_config == QED_OV_WOL_ENABLED) {
+ u8 *p_mac = p_hwfn->cdev->wol_mac;
+
+ memset(&wol_mac, 0, sizeof(wol_mac));
+ wol_mac.mac_upper = p_mac[0] << 8 | p_mac[1];
+ wol_mac.mac_lower = p_mac[2] << 24 | p_mac[3] << 16 |
+ p_mac[4] << 8 | p_mac[5];
+
+ DP_VERBOSE(p_hwfn,
+ (QED_MSG_SP | NETIF_MSG_IFDOWN),
+ "Setting WoL MAC: %pM --> [%08x,%08x]\n",
+ p_mac, wol_mac.mac_upper, wol_mac.mac_lower);
+
+ mb_params.p_data_src = &wol_mac;
+ mb_params.data_src_size = sizeof(wol_mac);
+ }
+
+ return qed_mcp_cmd_and_union(p_hwfn, p_ptt, &mb_params);
+}
+
static void qed_mcp_handle_vf_flr(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt)
{
diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.h b/drivers/net/ethernet/qlogic/qed/qed_mcp.h
index f63693d..7d067d0 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.h
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.h
@@ -593,6 +593,26 @@ int qed_mcp_load_req(struct qed_hwfn *p_hwfn,
u32 *p_load_code);
/**
+ * @brief Sends a UNLOAD_REQ message to the MFW
+ *
+ * @param p_hwfn
+ * @param p_ptt
+ *
+ * @return int - 0 - Operation was successful.
+ */
+int qed_mcp_unload_req(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
+
+/**
+ * @brief Sends a UNLOAD_DONE message to the MFW
+ *
+ * @param p_hwfn
+ * @param p_ptt
+ *
+ * @return int - 0 - Operation was successful.
+ */
+int qed_mcp_unload_done(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
+
+/**
* @brief Read the MFW mailbox into Current buffer.
*
* @param p_hwfn
--
1.9.3
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