[dpdk-dev] [PATCH v4 25/32] net/qede/base: add support to initiate PF FLR

[Rasesh Mody <rasesh.mody@qlogic.com>]

From: Harish Patil <harish.patil@qlogic.com>

Add support to send PF FLR request to the management firmware to
bringup the device in clean slate. This cleanup is necessary
in some corner cases where the device would be left in a bad
state from its previous operations. The driver will send PF FLR
request before slowpath initialization.

Signed-off-by: Harish Patil <harish.patil@qlogic.com>
---
 doc/guides/nics/qede.rst          |  1 -
 drivers/net/qede/base/ecore_dev.c | 15 +++++++++++----
 drivers/net/qede/base/ecore_mcp.c |  9 +++++++++
 drivers/net/qede/base/ecore_mcp.h | 11 +++++++++++
 4 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/doc/guides/nics/qede.rst b/doc/guides/nics/qede.rst
index c19f499..9d85d8d 100644
--- a/doc/guides/nics/qede.rst
+++ b/doc/guides/nics/qede.rst
@@ -65,7 +65,6 @@ Non-supported Features
 
 - SR-IOV PF
 - Tunneling offloads
-- Reload of the PMD after a non-graceful termination
 
 Supported QLogic Adapters
 -------------------------
diff --git a/drivers/net/qede/base/ecore_dev.c b/drivers/net/qede/base/ecore_dev.c
index b530173..6060f9e 100644
--- a/drivers/net/qede/base/ecore_dev.c
+++ b/drivers/net/qede/base/ecore_dev.c
@@ -2952,13 +2952,14 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn, void OSAL_IOMEM *p_regview,
 			void OSAL_IOMEM *p_doorbells,
 			struct ecore_hw_prepare_params *p_params)
 {
+	struct ecore_dev *p_dev = p_hwfn->p_dev;
 	enum _ecore_status_t rc = ECORE_SUCCESS;
 
 	/* Split PCI bars evenly between hwfns */
 	p_hwfn->regview = p_regview;
 	p_hwfn->doorbells = p_doorbells;
 
-	if (IS_VF(p_hwfn->p_dev))
+	if (IS_VF(p_dev))
 		return ecore_vf_hw_prepare(p_hwfn);
 
 	/* Validate that chip access is feasible */
@@ -2982,7 +2983,7 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn, void OSAL_IOMEM *p_regview,
 
 	/* First hwfn learns basic information, e.g., number of hwfns */
 	if (!p_hwfn->my_id) {
-		rc = ecore_get_dev_info(p_hwfn->p_dev);
+		rc = ecore_get_dev_info(p_dev);
 		if (rc != ECORE_SUCCESS)
 			goto err1;
 	}
@@ -2996,6 +2997,12 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn, void OSAL_IOMEM *p_regview,
 		goto err1;
 	}
 
+	if (p_hwfn == ECORE_LEADING_HWFN(p_dev) && !p_dev->recov_in_prog) {
+		rc = ecore_mcp_initiate_pf_flr(p_hwfn, p_hwfn->p_main_ptt);
+		if (rc != ECORE_SUCCESS)
+			DP_NOTICE(p_hwfn, false, "Failed to initiate PF FLR\n");
+	}
+
 	/* Read the device configuration information from the HW and SHMEM */
 	rc = ecore_get_hw_info(p_hwfn, p_hwfn->p_main_ptt,
 			       p_params->personality, p_params->drv_resc_alloc);
@@ -3011,7 +3018,7 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn, void OSAL_IOMEM *p_regview,
 		goto err2;
 	}
 #ifndef ASIC_ONLY
-	if (CHIP_REV_IS_FPGA(p_hwfn->p_dev)) {
+	if (CHIP_REV_IS_FPGA(p_dev)) {
 		DP_NOTICE(p_hwfn, false,
 			  "FPGA: workaround; Prevent DMAE parities\n");
 		ecore_wr(p_hwfn, p_hwfn->p_main_ptt, PCIE_REG_PRTY_MASK, 7);
@@ -3026,7 +3033,7 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn, void OSAL_IOMEM *p_regview,
 	return rc;
  err2:
 	if (IS_LEAD_HWFN(p_hwfn))
-		ecore_iov_free_hw_info(p_hwfn->p_dev);
+		ecore_iov_free_hw_info(p_dev);
 	ecore_mcp_free(p_hwfn);
  err1:
 	ecore_hw_hwfn_free(p_hwfn);
diff --git a/drivers/net/qede/base/ecore_mcp.c b/drivers/net/qede/base/ecore_mcp.c
index 500368e..2ff9715 100644
--- a/drivers/net/qede/base/ecore_mcp.c
+++ b/drivers/net/qede/base/ecore_mcp.c
@@ -2442,3 +2442,12 @@ enum _ecore_status_t ecore_mcp_get_resc_info(struct ecore_hwfn *p_hwfn,
 
 	return ECORE_SUCCESS;
 }
+
+enum _ecore_status_t ecore_mcp_initiate_pf_flr(struct ecore_hwfn *p_hwfn,
+					       struct ecore_ptt *p_ptt)
+{
+	u32 mcp_resp, mcp_param;
+
+	return ecore_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_INITIATE_PF_FLR,
+			     0, &mcp_resp, &mcp_param);
+}
diff --git a/drivers/net/qede/base/ecore_mcp.h b/drivers/net/qede/base/ecore_mcp.h
index d3103ff..831890c 100644
--- a/drivers/net/qede/base/ecore_mcp.h
+++ b/drivers/net/qede/base/ecore_mcp.h
@@ -353,4 +353,15 @@ enum _ecore_status_t ecore_mcp_get_resc_info(struct ecore_hwfn *p_hwfn,
 					     struct resource_info *p_resc_info,
 					     u32 *p_mcp_resp, u32 *p_mcp_param);
 
+/**
+ * @brief - Initiates PF FLR
+ *
+ * @param p_hwfn
+ * @param p_ptt
+ *
+ * @param return ECORE_SUCCESS upon success.
+ */
+enum _ecore_status_t ecore_mcp_initiate_pf_flr(struct ecore_hwfn *p_hwfn,
+					       struct ecore_ptt *p_ptt);
+
 #endif /* __ECORE_MCP_H__ */
-- 
1.8.3.1