[dpdk-dev] [PATCH v5 17/62] net/qede/base: allow probe to succeed with minor HW-issues

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

Allow probe to succeed with various 'minor' HW-issues [if requested]

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>
---
 drivers/net/qede/base/ecore_dev.c     |   71 +++++++++++++++++++++++++++------
 drivers/net/qede/base/ecore_dev_api.h |   40 ++++++++++++++++---
 2 files changed, 94 insertions(+), 17 deletions(-)

diff --git a/drivers/net/qede/base/ecore_dev.c b/drivers/net/qede/base/ecore_dev.c
index 1b033b7..907566c 100644
--- a/drivers/net/qede/base/ecore_dev.c
+++ b/drivers/net/qede/base/ecore_dev.c
@@ -2445,12 +2445,15 @@ static enum _ecore_status_t ecore_hw_get_resc(struct ecore_hwfn *p_hwfn,
 	return ECORE_SUCCESS;
 }
 
-static enum _ecore_status_t ecore_hw_get_nvm_info(struct ecore_hwfn *p_hwfn,
-						  struct ecore_ptt *p_ptt)
+static enum _ecore_status_t
+ecore_hw_get_nvm_info(struct ecore_hwfn *p_hwfn,
+		      struct ecore_ptt *p_ptt,
+		      struct ecore_hw_prepare_params *p_params)
 {
 	u32 nvm_cfg1_offset, mf_mode, addr, generic_cont0, core_cfg, dcbx_mode;
 	u32 port_cfg_addr, link_temp, nvm_cfg_addr, device_capabilities;
 	struct ecore_mcp_link_params *link;
+	enum _ecore_status_t rc;
 
 	/* Read global nvm_cfg address */
 	nvm_cfg_addr = ecore_rd(p_hwfn, p_ptt, MISC_REG_GEN_PURP_CR0);
@@ -2458,6 +2461,8 @@ static enum _ecore_status_t ecore_hw_get_nvm_info(struct ecore_hwfn *p_hwfn,
 	/* Verify MCP has initialized it */
 	if (!nvm_cfg_addr) {
 		DP_NOTICE(p_hwfn, false, "Shared memory not initialized\n");
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_FAILED_NVM;
 		return ECORE_INVAL;
 	}
 
@@ -2643,7 +2648,13 @@ static enum _ecore_status_t ecore_hw_get_nvm_info(struct ecore_hwfn *p_hwfn,
 		OSAL_SET_BIT(ECORE_DEV_CAP_IWARP,
 			     &p_hwfn->hw_info.device_capabilities);
 
-	return ecore_mcp_fill_shmem_func_info(p_hwfn, p_ptt);
+	rc = ecore_mcp_fill_shmem_func_info(p_hwfn, p_ptt);
+	if (rc != ECORE_SUCCESS && p_params->b_relaxed_probe) {
+		rc = ECORE_SUCCESS;
+		p_params->p_relaxed_res = ECORE_HW_PREPARE_BAD_MCP;
+	}
+
+	return rc;
 }
 
 static void ecore_get_num_funcs(struct ecore_hwfn *p_hwfn,
@@ -2797,15 +2808,22 @@ static void ecore_hw_info_port_num(struct ecore_hwfn *p_hwfn,
 
 static enum _ecore_status_t
 ecore_get_hw_info(struct ecore_hwfn *p_hwfn, struct ecore_ptt *p_ptt,
-		  enum ecore_pci_personality personality, bool drv_resc_alloc)
+		  enum ecore_pci_personality personality,
+		  struct ecore_hw_prepare_params *p_params)
 {
+	bool drv_resc_alloc = p_params->drv_resc_alloc;
 	enum _ecore_status_t rc;
 
 	/* Since all information is common, only first hwfns should do this */
 	if (IS_LEAD_HWFN(p_hwfn)) {
 		rc = ecore_iov_hw_info(p_hwfn);
-		if (rc != ECORE_SUCCESS)
-			return rc;
+		if (rc != ECORE_SUCCESS) {
+			if (p_params->b_relaxed_probe)
+				p_params->p_relaxed_res =
+						ECORE_HW_PREPARE_BAD_IOV;
+			else
+				return rc;
+		}
 	}
 
 	/* TODO In get_hw_info, amoungst others:
@@ -2820,7 +2838,7 @@ ecore_get_hw_info(struct ecore_hwfn *p_hwfn, struct ecore_ptt *p_ptt,
 #ifndef ASIC_ONLY
 	if (CHIP_REV_IS_ASIC(p_hwfn->p_dev)) {
 #endif
-	rc = ecore_hw_get_nvm_info(p_hwfn, p_ptt);
+	rc = ecore_hw_get_nvm_info(p_hwfn, p_ptt, p_params);
 	if (rc != ECORE_SUCCESS)
 		return rc;
 #ifndef ASIC_ONLY
@@ -2828,8 +2846,12 @@ ecore_get_hw_info(struct ecore_hwfn *p_hwfn, struct ecore_ptt *p_ptt,
 #endif
 
 	rc = ecore_int_igu_read_cam(p_hwfn, p_ptt);
-	if (rc != ECORE_SUCCESS)
-		return rc;
+	if (rc != ECORE_SUCCESS) {
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_BAD_IGU;
+		else
+			return rc;
+	}
 
 #ifndef ASIC_ONLY
 	if (CHIP_REV_IS_ASIC(p_hwfn->p_dev) && ecore_mcp_is_init(p_hwfn)) {
@@ -2896,7 +2918,13 @@ ecore_get_hw_info(struct ecore_hwfn *p_hwfn, struct ecore_ptt *p_ptt,
 	 * the resources/features depends on them.
 	 * This order is not harmful if not forcing.
 	 */
-	return ecore_hw_get_resc(p_hwfn, drv_resc_alloc);
+	rc = ecore_hw_get_resc(p_hwfn, drv_resc_alloc);
+	if (rc != ECORE_SUCCESS && p_params->b_relaxed_probe) {
+		rc = ECORE_SUCCESS;
+		p_params->p_relaxed_res = ECORE_HW_PREPARE_BAD_MCP;
+	}
+
+	return rc;
 }
 
 static enum _ecore_status_t ecore_get_dev_info(struct ecore_dev *p_dev)
@@ -3028,6 +3056,8 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn,
 	if (REG_RD(p_hwfn, PXP_PF_ME_OPAQUE_ADDR) == 0xffffffff) {
 		DP_ERR(p_hwfn,
 		       "Reading the ME register returns all Fs; Preventing further chip access\n");
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_FAILED_ME;
 		return ECORE_INVAL;
 	}
 
@@ -3037,6 +3067,8 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn,
 	rc = ecore_ptt_pool_alloc(p_hwfn);
 	if (rc) {
 		DP_NOTICE(p_hwfn, true, "Failed to prepare hwfn's hw\n");
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_FAILED_MEM;
 		goto err0;
 	}
 
@@ -3046,8 +3078,12 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn,
 	/* First hwfn learns basic information, e.g., number of hwfns */
 	if (!p_hwfn->my_id) {
 		rc = ecore_get_dev_info(p_dev);
-		if (rc != ECORE_SUCCESS)
+		if (rc != ECORE_SUCCESS) {
+			if (p_params->b_relaxed_probe)
+				p_params->p_relaxed_res =
+					ECORE_HW_PREPARE_FAILED_DEV;
 			goto err1;
+		}
 	}
 
 	ecore_hw_hwfn_prepare(p_hwfn);
@@ -3056,12 +3092,14 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn,
 	rc = ecore_mcp_cmd_init(p_hwfn, p_hwfn->p_main_ptt);
 	if (rc) {
 		DP_NOTICE(p_hwfn, true, "Failed initializing mcp command\n");
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_FAILED_MEM;
 		goto err1;
 	}
 
 	/* 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);
+			       p_params->personality, p_params);
 	if (rc) {
 		DP_NOTICE(p_hwfn, true, "Failed to get HW information\n");
 		goto err2;
@@ -3094,6 +3132,8 @@ ecore_hw_prepare_single(struct ecore_hwfn *p_hwfn,
 	rc = ecore_init_alloc(p_hwfn);
 	if (rc) {
 		DP_NOTICE(p_hwfn, true, "Failed to allocate the init array\n");
+		if (p_params->b_relaxed_probe)
+			p_params->p_relaxed_res = ECORE_HW_PREPARE_FAILED_MEM;
 		goto err2;
 	}
 #ifndef ASIC_ONLY
@@ -3129,6 +3169,9 @@ enum _ecore_status_t ecore_hw_prepare(struct ecore_dev *p_dev,
 
 	p_dev->chk_reg_fifo = p_params->chk_reg_fifo;
 
+	if (p_params->b_relaxed_probe)
+		p_params->p_relaxed_res = ECORE_HW_PREPARE_SUCCESS;
+
 	/* Store the precompiled init data ptrs */
 	if (IS_PF(p_dev))
 		ecore_init_iro_array(p_dev);
@@ -3164,6 +3207,10 @@ enum _ecore_status_t ecore_hw_prepare(struct ecore_dev *p_dev,
 		 * initiliazed hwfn 0.
 		 */
 		if (rc != ECORE_SUCCESS) {
+			if (p_params->b_relaxed_probe)
+				p_params->p_relaxed_res =
+						ECORE_HW_PREPARE_FAILED_ENG2;
+
 			if (IS_PF(p_dev)) {
 				ecore_init_free(p_hwfn);
 				ecore_mcp_free(p_hwfn);
diff --git a/drivers/net/qede/base/ecore_dev_api.h b/drivers/net/qede/base/ecore_dev_api.h
index e7332ac..74a15ef 100644
--- a/drivers/net/qede/base/ecore_dev_api.h
+++ b/drivers/net/qede/base/ecore_dev_api.h
@@ -138,17 +138,47 @@ void ecore_hw_start_fastpath(struct ecore_hwfn *p_hwfn);
  */
 enum _ecore_status_t ecore_hw_reset(struct ecore_dev *p_dev);
 
+enum ecore_hw_prepare_result {
+	ECORE_HW_PREPARE_SUCCESS,
+
+	/* FAILED results indicate probe has failed & cleaned up */
+	ECORE_HW_PREPARE_FAILED_ENG2,
+	ECORE_HW_PREPARE_FAILED_ME,
+	ECORE_HW_PREPARE_FAILED_MEM,
+	ECORE_HW_PREPARE_FAILED_DEV,
+	ECORE_HW_PREPARE_FAILED_NVM,
+
+	/* BAD results indicate probe is passed even though some wrongness
+	 * has occurred; Trying to actually use [I.e., hw_init()] might have
+	 * dire reprecautions.
+	 */
+	ECORE_HW_PREPARE_BAD_IOV,
+	ECORE_HW_PREPARE_BAD_MCP,
+	ECORE_HW_PREPARE_BAD_IGU,
+};
+
 struct ecore_hw_prepare_params {
-	/* personality to initialize */
+	/* Personality to initialize */
 	int personality;
-	/* force the driver's default resource allocation */
+
+	/* Force the driver's default resource allocation */
 	bool drv_resc_alloc;
-	/* check the reg_fifo after any register access */
+
+	/* Check the reg_fifo after any register access */
 	bool chk_reg_fifo;
-	/* request the MFW to initiate PF FLR */
+
+	/* Request the MFW to initiate PF FLR */
 	bool initiate_pf_flr;
-	/* the OS Epoch time in seconds */
+
+	/* The OS Epoch time in seconds */
 	u32 epoch;
+
+	/* Allow prepare to pass even if some initializations are failing.
+	 * If set, the `p_prepare_res' field would be set with the return,
+	 * and might allow probe to pass even if there are certain issues.
+	 */
+	bool b_relaxed_probe;
+	enum ecore_hw_prepare_result p_relaxed_res;
 };
 
 /**
-- 
1.7.10.3