[PATCH v3 41/61] net/qede/base: add support for previous driver unload

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

New driver/management fw load request sequence for handling previous
driver unload.

Signed-off-by: Rasesh Mody <rasesh.mody@cavium.com>
---
 drivers/net/qede/base/ecore.h         |   13 ++
 drivers/net/qede/base/ecore_dev.c     |   43 ++--
 drivers/net/qede/base/ecore_dev_api.h |   30 ++-
 drivers/net/qede/base/ecore_mcp.c     |  369 ++++++++++++++++++++++++++++++---
 drivers/net/qede/base/ecore_mcp.h     |   40 ++--
 drivers/net/qede/base/mcp_public.h    |   56 ++++-
 drivers/net/qede/qede_main.c          |    2 +
 7 files changed, 482 insertions(+), 71 deletions(-)

diff --git a/drivers/net/qede/base/ecore.h b/drivers/net/qede/base/ecore.h
index acf2244..60a8a6b 100644
--- a/drivers/net/qede/base/ecore.h
+++ b/drivers/net/qede/base/ecore.h
@@ -28,6 +28,19 @@
 #include "ecore_proto_if.h"
 #include "mcp_public.h"
 
+#define ECORE_MAJOR_VERSION		8
+#define ECORE_MINOR_VERSION		18
+#define ECORE_REVISION_VERSION		7
+#define ECORE_ENGINEERING_VERSION	0
+
+#define ECORE_VERSION							\
+	((ECORE_MAJOR_VERSION << 24) | (ECORE_MINOR_VERSION << 16) |	\
+	 (ECORE_REVISION_VERSION << 8) | ECORE_ENGINEERING_VERSION)
+
+#define STORM_FW_VERSION						\
+	((FW_MAJOR_VERSION << 24) | (FW_MINOR_VERSION << 16) |	\
+	 (FW_REVISION_VERSION << 8) | FW_ENGINEERING_VERSION)
+
 #define MAX_HWFNS_PER_DEVICE	2
 #define NAME_SIZE 128 /* @DPDK */
 #define ECORE_WFQ_UNIT	100
diff --git a/drivers/net/qede/base/ecore_dev.c b/drivers/net/qede/base/ecore_dev.c
index 6d75e60..29dd292 100644
--- a/drivers/net/qede/base/ecore_dev.c
+++ b/drivers/net/qede/base/ecore_dev.c
@@ -1901,10 +1901,11 @@ enum _ecore_status_t ecore_vf_start(struct ecore_hwfn *p_hwfn,
 enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 				   struct ecore_hw_init_params *p_params)
 {
-	enum _ecore_status_t rc = ECORE_SUCCESS, mfw_rc;
+	struct ecore_load_req_params load_req_params;
 	u32 load_code, param, drv_mb_param;
-	bool b_default_mtu = true;
 	struct ecore_hwfn *p_hwfn;
+	bool b_default_mtu = true;
+	enum _ecore_status_t rc = ECORE_SUCCESS, mfw_rc;
 	int i;
 
 	if ((p_params->int_mode == ECORE_INT_MODE_MSI) &&
@@ -1943,17 +1944,25 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 		if (rc != ECORE_SUCCESS)
 			return rc;
 
-		/* @@@TBD need to add here:
-		 * Check for fan failure
-		 * Prev_unload
-		 */
-		rc = ecore_mcp_load_req(p_hwfn, p_hwfn->p_main_ptt, &load_code);
-		if (rc) {
+		OSAL_MEM_ZERO(&load_req_params, sizeof(load_req_params));
+		load_req_params.drv_role = p_params->is_crash_kernel ?
+					   ECORE_DRV_ROLE_KDUMP :
+					   ECORE_DRV_ROLE_OS;
+		load_req_params.timeout_val = p_params->mfw_timeout_val;
+		load_req_params.avoid_eng_reset = p_params->avoid_eng_reset;
+		rc = ecore_mcp_load_req(p_hwfn, p_hwfn->p_main_ptt,
+					&load_req_params);
+		if (rc != ECORE_SUCCESS) {
 			DP_NOTICE(p_hwfn, true,
-				  "Failed sending LOAD_REQ command\n");
+				  "Failed sending a LOAD_REQ command\n");
 			return rc;
 		}
 
+		load_code = load_req_params.load_code;
+		DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
+			   "Load request was sent. Load code: 0x%x\n",
+			   load_code);
+
 		/* CQ75580:
 		 * When coming back from hiberbate state, the registers from
 		 * which shadow is read initially are not initialized. It turns
@@ -1966,10 +1975,6 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 		 */
 		ecore_reset_mb_shadow(p_hwfn, p_hwfn->p_main_ptt);
 
-		DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
-			   "Load request was sent. Resp:0x%x, Load code: 0x%x\n",
-			   rc, load_code);
-
 		/* Only relevant for recovery:
 		 * Clear the indication after the LOAD_REQ command is responded
 		 * by the MFW.
@@ -1988,13 +1993,13 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 		case FW_MSG_CODE_DRV_LOAD_ENGINE:
 			rc = ecore_hw_init_common(p_hwfn, p_hwfn->p_main_ptt,
 						  p_hwfn->hw_info.hw_mode);
-			if (rc)
+			if (rc != ECORE_SUCCESS)
 				break;
 			/* Fall into */
 		case FW_MSG_CODE_DRV_LOAD_PORT:
 			rc = ecore_hw_init_port(p_hwfn, p_hwfn->p_main_ptt,
 						p_hwfn->hw_info.hw_mode);
-			if (rc)
+			if (rc != ECORE_SUCCESS)
 				break;
 			/* Fall into */
 		case FW_MSG_CODE_DRV_LOAD_FUNCTION:
@@ -2006,6 +2011,8 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 					      p_params->allow_npar_tx_switch);
 			break;
 		default:
+			DP_NOTICE(p_hwfn, false,
+				  "Unexpected load code [0x%08x]", load_code);
 			rc = ECORE_NOTIMPL;
 			break;
 		}
@@ -2021,6 +2028,7 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 				       0, &load_code, &param);
 		if (rc != ECORE_SUCCESS)
 			return rc;
+
 		if (mfw_rc != ECORE_SUCCESS) {
 			DP_NOTICE(p_hwfn, true,
 				  "Failed sending LOAD_DONE command\n");
@@ -2045,10 +2053,7 @@ enum _ecore_status_t ecore_hw_init(struct ecore_dev *p_dev,
 
 	if (IS_PF(p_dev)) {
 		p_hwfn = ECORE_LEADING_HWFN(p_dev);
-		drv_mb_param = (FW_MAJOR_VERSION << 24) |
-			       (FW_MINOR_VERSION << 16) |
-			       (FW_REVISION_VERSION << 8) |
-			       (FW_ENGINEERING_VERSION);
+		drv_mb_param = STORM_FW_VERSION;
 		rc = ecore_mcp_cmd(p_hwfn, p_hwfn->p_main_ptt,
 				   DRV_MSG_CODE_OV_UPDATE_STORM_FW_VER,
 				   drv_mb_param, &load_code, &param);
diff --git a/drivers/net/qede/base/ecore_dev_api.h b/drivers/net/qede/base/ecore_dev_api.h
index 356c5e4..7e90778 100644
--- a/drivers/net/qede/base/ecore_dev_api.h
+++ b/drivers/net/qede/base/ecore_dev_api.h
@@ -58,16 +58,38 @@ enum _ecore_status_t ecore_resc_alloc(struct ecore_dev *p_dev);
 void ecore_resc_setup(struct ecore_dev *p_dev);
 
 struct ecore_hw_init_params {
-	/* tunnelling parameters */
+	/* Tunnelling parameters */
 	struct ecore_tunnel_info *p_tunn;
+
 	bool b_hw_start;
-	/* interrupt mode [msix, inta, etc.] to use */
+
+	/* Interrupt mode [msix, inta, etc.] to use */
 	enum ecore_int_mode int_mode;
-/* npar tx switching to be used for vports configured for tx-switching */
 
+	/* NPAR tx switching to be used for vports configured for tx-switching
+	 */
 	bool allow_npar_tx_switch;
-	/* binary fw data pointer in binary fw file */
+
+	/* Binary fw data pointer in binary fw file */
 	const u8 *bin_fw_data;
+
+	/* Indicates whether the driver is running over a crash kernel.
+	 * As part of the load request, this will be used for providing the
+	 * driver role to the MFW.
+	 * In case of a crash kernel over PDA - this should be set to false.
+	 */
+	bool is_crash_kernel;
+
+	/* The timeout value that the MFW should use when locking the engine for
+	 * the driver load process.
+	 * A value of '0' means the default value, and '255' means no timeout.
+	 */
+	u8 mfw_timeout_val;
+#define ECORE_LOAD_REQ_LOCK_TO_DEFAULT	0
+#define ECORE_LOAD_REQ_LOCK_TO_NONE	255
+
+	/* Avoid engine reset when first PF loads on it */
+	bool avoid_eng_reset;
 };
 
 /**
diff --git a/drivers/net/qede/base/ecore_mcp.c b/drivers/net/qede/base/ecore_mcp.c
index 30cb76e..6c5b5db 100644
--- a/drivers/net/qede/base/ecore_mcp.c
+++ b/drivers/net/qede/base/ecore_mcp.c
@@ -518,51 +518,368 @@ static void ecore_mcp_mf_workaround(struct ecore_hwfn *p_hwfn,
 }
 #endif
 
+static bool ecore_mcp_can_force_load(u8 drv_role, u8 exist_drv_role)
+{
+	return (drv_role == DRV_ROLE_OS &&
+		exist_drv_role == DRV_ROLE_PREBOOT) ||
+	       (drv_role == DRV_ROLE_KDUMP && exist_drv_role == DRV_ROLE_OS);
+}
+
+static enum _ecore_status_t ecore_mcp_cancel_load_req(struct ecore_hwfn *p_hwfn,
+						      struct ecore_ptt *p_ptt)
+{
+	u32 resp = 0, param = 0;
+	enum _ecore_status_t rc;
+
+	rc = ecore_mcp_cmd(p_hwfn, p_ptt, DRV_MSG_CODE_CANCEL_LOAD_REQ, 0,
+			   &resp, &param);
+	if (rc != ECORE_SUCCESS)
+		DP_NOTICE(p_hwfn, false,
+			  "Failed to send cancel load request, rc = %d\n", rc);
+
+	return rc;
+}
+
+#define CONFIG_ECORE_L2_BITMAP_IDX	(0x1 << 0)
+#define CONFIG_ECORE_SRIOV_BITMAP_IDX	(0x1 << 1)
+#define CONFIG_ECORE_ROCE_BITMAP_IDX	(0x1 << 2)
+#define CONFIG_ECORE_IWARP_BITMAP_IDX	(0x1 << 3)
+#define CONFIG_ECORE_FCOE_BITMAP_IDX	(0x1 << 4)
+#define CONFIG_ECORE_ISCSI_BITMAP_IDX	(0x1 << 5)
+#define CONFIG_ECORE_LL2_BITMAP_IDX	(0x1 << 6)
+
+static u32 ecore_get_config_bitmap(void)
+{
+	u32 config_bitmap = 0x0;
+
+#ifdef CONFIG_ECORE_L2
+	config_bitmap |= CONFIG_ECORE_L2_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_SRIOV
+	config_bitmap |= CONFIG_ECORE_SRIOV_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_ROCE
+	config_bitmap |= CONFIG_ECORE_ROCE_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_IWARP
+	config_bitmap |= CONFIG_ECORE_IWARP_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_FCOE
+	config_bitmap |= CONFIG_ECORE_FCOE_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_ISCSI
+	config_bitmap |= CONFIG_ECORE_ISCSI_BITMAP_IDX;
+#endif
+#ifdef CONFIG_ECORE_LL2
+	config_bitmap |= CONFIG_ECORE_LL2_BITMAP_IDX;
+#endif
+
+	return config_bitmap;
+}
+
+struct ecore_load_req_in_params {
+	u8 hsi_ver;
+#define ECORE_LOAD_REQ_HSI_VER_DEFAULT	0
+#define ECORE_LOAD_REQ_HSI_VER_1	1
+	u32 drv_ver_0;
+	u32 drv_ver_1;
+	u32 fw_ver;
+	u8 drv_role;
+	u8 timeout_val;
+	u8 force_cmd;
+	bool avoid_eng_reset;
+};
+
+struct ecore_load_req_out_params {
+	u32 load_code;
+	u32 exist_drv_ver_0;
+	u32 exist_drv_ver_1;
+	u32 exist_fw_ver;
+	u8 exist_drv_role;
+	u8 mfw_hsi_ver;
+	bool drv_exists;
+};
+
+static enum _ecore_status_t
+__ecore_mcp_load_req(struct ecore_hwfn *p_hwfn, struct ecore_ptt *p_ptt,
+		     struct ecore_load_req_in_params *p_in_params,
+		     struct ecore_load_req_out_params *p_out_params)
+{
+	union drv_union_data union_data_src, union_data_dst;
+	struct ecore_mcp_mb_params mb_params;
+	struct load_req_stc *p_load_req;
+	struct load_rsp_stc *p_load_rsp;
+	u32 hsi_ver;
+	enum _ecore_status_t rc;
+
+	p_load_req = &union_data_src.load_req;
+	OSAL_MEM_ZERO(p_load_req, sizeof(*p_load_req));
+	p_load_req->drv_ver_0 = p_in_params->drv_ver_0;
+	p_load_req->drv_ver_1 = p_in_params->drv_ver_1;
+	p_load_req->fw_ver = p_in_params->fw_ver;
+	ECORE_MFW_SET_FIELD(p_load_req->misc0, LOAD_REQ_ROLE,
+			    p_in_params->drv_role);
+	ECORE_MFW_SET_FIELD(p_load_req->misc0, LOAD_REQ_LOCK_TO,
+			    p_in_params->timeout_val);
+	ECORE_MFW_SET_FIELD(p_load_req->misc0, LOAD_REQ_FORCE,
+			    p_in_params->force_cmd);
+	ECORE_MFW_SET_FIELD(p_load_req->misc0, LOAD_REQ_FLAGS0,
+			    p_in_params->avoid_eng_reset);
+
+	hsi_ver = (p_in_params->hsi_ver == ECORE_LOAD_REQ_HSI_VER_DEFAULT) ?
+		  DRV_ID_MCP_HSI_VER_CURRENT :
+		  (p_in_params->hsi_ver << DRV_ID_MCP_HSI_VER_SHIFT);
+
+	OSAL_MEM_ZERO(&mb_params, sizeof(mb_params));
+	mb_params.cmd = DRV_MSG_CODE_LOAD_REQ;
+	mb_params.param = PDA_COMP | hsi_ver | p_hwfn->p_dev->drv_type;
+	mb_params.p_data_src = &union_data_src;
+	mb_params.p_data_dst = &union_data_dst;
+
+	DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
+		   "Load Request: param 0x%08x [init_hw %d, drv_type %d, hsi_ver %d, pda 0x%04x]\n",
+		   mb_params.param,
+		   ECORE_MFW_GET_FIELD(mb_params.param, DRV_ID_DRV_INIT_HW),
+		   ECORE_MFW_GET_FIELD(mb_params.param, DRV_ID_DRV_TYPE),
+		   ECORE_MFW_GET_FIELD(mb_params.param, DRV_ID_MCP_HSI_VER),
+		   ECORE_MFW_GET_FIELD(mb_params.param, DRV_ID_PDA_COMP_VER));
+
+	if (p_in_params->hsi_ver != ECORE_LOAD_REQ_HSI_VER_1)
+		DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
+			   "Load Request: drv_ver 0x%08x_0x%08x, fw_ver 0x%08x, misc0 0x%08x [role %d, timeout %d, force %d, flags0 0x%x]\n",
+			   p_load_req->drv_ver_0, p_load_req->drv_ver_1,
+			   p_load_req->fw_ver, p_load_req->misc0,
+			   ECORE_MFW_GET_FIELD(p_load_req->misc0,
+					       LOAD_REQ_ROLE),
+			   ECORE_MFW_GET_FIELD(p_load_req->misc0,
+					       LOAD_REQ_LOCK_TO),
+			   ECORE_MFW_GET_FIELD(p_load_req->misc0,
+					       LOAD_REQ_FORCE),
+			   ECORE_MFW_GET_FIELD(p_load_req->misc0,
+					       LOAD_REQ_FLAGS0));
+
+	rc = ecore_mcp_cmd_and_union(p_hwfn, p_ptt, &mb_params);
+	if (rc != ECORE_SUCCESS) {
+		DP_NOTICE(p_hwfn, false,
+			  "Failed to send load request, rc = %d\n", rc);
+		return rc;
+	}
+
+	DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
+		   "Load Response: resp 0x%08x\n", mb_params.mcp_resp);
+	p_out_params->load_code = mb_params.mcp_resp;
+
+	if (p_in_params->hsi_ver != ECORE_LOAD_REQ_HSI_VER_1 &&
+	    p_out_params->load_code != FW_MSG_CODE_DRV_LOAD_REFUSED_HSI_1) {
+		p_load_rsp = &union_data_dst.load_rsp;
+		DP_VERBOSE(p_hwfn, ECORE_MSG_SP,
+			   "Load Response: exist_drv_ver 0x%08x_0x%08x, exist_fw_ver 0x%08x, misc0 0x%08x [exist_role %d, mfw_hsi %d, flags0 0x%x]\n",
+			   p_load_rsp->drv_ver_0, p_load_rsp->drv_ver_1,
+			   p_load_rsp->fw_ver, p_load_rsp->misc0,
+			   ECORE_MFW_GET_FIELD(p_load_rsp->misc0,
+					       LOAD_RSP_ROLE),
+			   ECORE_MFW_GET_FIELD(p_load_rsp->misc0,
+					       LOAD_RSP_HSI),
+			   ECORE_MFW_GET_FIELD(p_load_rsp->misc0,
+					       LOAD_RSP_FLAGS0));
+
+		p_out_params->exist_drv_ver_0 = p_load_rsp->drv_ver_0;
+		p_out_params->exist_drv_ver_1 = p_load_rsp->drv_ver_1;
+		p_out_params->exist_fw_ver = p_load_rsp->fw_ver;
+		p_out_params->exist_drv_role =
+			ECORE_MFW_GET_FIELD(p_load_rsp->misc0, LOAD_RSP_ROLE);
+		p_out_params->mfw_hsi_ver =
+			ECORE_MFW_GET_FIELD(p_load_rsp->misc0, LOAD_RSP_HSI);
+		p_out_params->drv_exists =
+			ECORE_MFW_GET_FIELD(p_load_rsp->misc0,
+					    LOAD_RSP_FLAGS0) &
+			LOAD_RSP_FLAGS0_DRV_EXISTS;
+	}
+
+	return ECORE_SUCCESS;
+}
+
+static enum _ecore_status_t eocre_get_mfw_drv_role(struct ecore_hwfn *p_hwfn,
+						   enum ecore_drv_role drv_role,
+						   u8 *p_mfw_drv_role)
+{
+	switch (drv_role) {
+	case ECORE_DRV_ROLE_OS:
+		*p_mfw_drv_role = DRV_ROLE_OS;
+		break;
+	case ECORE_DRV_ROLE_KDUMP:
+		*p_mfw_drv_role = DRV_ROLE_KDUMP;
+		break;
+	default:
+		DP_ERR(p_hwfn, "Unexpected driver role %d\n", drv_role);
+		return ECORE_INVAL;
+	}
+
+	return ECORE_SUCCESS;
+}
+
+enum ecore_load_req_force {
+	ECORE_LOAD_REQ_FORCE_NONE,
+	ECORE_LOAD_REQ_FORCE_PF,
+	ECORE_LOAD_REQ_FORCE_ALL,
+};
+
+static enum _ecore_status_t
+ecore_get_mfw_force_cmd(struct ecore_hwfn *p_hwfn,
+			enum ecore_load_req_force force_cmd,
+			u8 *p_mfw_force_cmd)
+{
+	switch (force_cmd) {
+	case ECORE_LOAD_REQ_FORCE_NONE:
+		*p_mfw_force_cmd = LOAD_REQ_FORCE_NONE;
+		break;
+	case ECORE_LOAD_REQ_FORCE_PF:
+		*p_mfw_force_cmd = LOAD_REQ_FORCE_PF;
+		break;
+	case ECORE_LOAD_REQ_FORCE_ALL:
+		*p_mfw_force_cmd = LOAD_REQ_FORCE_ALL;
+		break;
+	default:
+		DP_ERR(p_hwfn, "Unexpected force value %d\n", force_cmd);
+		return ECORE_INVAL;
+	}
+
+	return ECORE_SUCCESS;
+}
+
 enum _ecore_status_t ecore_mcp_load_req(struct ecore_hwfn *p_hwfn,
 					struct ecore_ptt *p_ptt,
-					u32 *p_load_code)
+					struct ecore_load_req_params *p_params)
 {
-	struct ecore_dev *p_dev = p_hwfn->p_dev;
-	struct ecore_mcp_mb_params mb_params;
+	struct ecore_load_req_out_params out_params;
+	struct ecore_load_req_in_params in_params;
+	u8 mfw_drv_role, mfw_force_cmd;
 	enum _ecore_status_t rc;
 
 #ifndef ASIC_ONLY
 	if (CHIP_REV_IS_EMUL(p_hwfn->p_dev)) {
-		ecore_mcp_mf_workaround(p_hwfn, p_load_code);
+		ecore_mcp_mf_workaround(p_hwfn, &p_params->load_code);
 		return ECORE_SUCCESS;
 	}
 #endif
 
-	OSAL_MEM_ZERO(&mb_params, sizeof(mb_params));
-	mb_params.cmd = DRV_MSG_CODE_LOAD_REQ;
-	mb_params.param = PDA_COMP | DRV_ID_MCP_HSI_VER_CURRENT |
-			  p_dev->drv_type;
-	rc = ecore_mcp_cmd_and_union(p_hwfn, p_ptt, &mb_params);
+	OSAL_MEM_ZERO(&in_params, sizeof(in_params));
+	in_params.hsi_ver = ECORE_LOAD_REQ_HSI_VER_DEFAULT;
+	in_params.drv_ver_0 = ECORE_VERSION;
+	in_params.drv_ver_1 = ecore_get_config_bitmap();
+	in_params.fw_ver = STORM_FW_VERSION;
+	rc = eocre_get_mfw_drv_role(p_hwfn, p_params->drv_role, &mfw_drv_role);
+	if (rc != ECORE_SUCCESS)
+		return rc;
 
-	/* if mcp fails to respond we must abort */
-	if (rc != ECORE_SUCCESS) {
-		DP_ERR(p_hwfn, "MCP response failure, aborting\n");
+	in_params.drv_role = mfw_drv_role;
+	in_params.timeout_val = p_params->timeout_val;
+	rc = ecore_get_mfw_force_cmd(p_hwfn, ECORE_LOAD_REQ_FORCE_NONE,
+				     &mfw_force_cmd);
+	if (rc != ECORE_SUCCESS)
 		return rc;
-	}
 
-	*p_load_code = mb_params.mcp_resp;
+	in_params.force_cmd = mfw_force_cmd;
+	in_params.avoid_eng_reset = p_params->avoid_eng_reset;
 
-	/* If MFW refused (e.g. other port is in diagnostic mode) we
-	 * must abort. This can happen in the following cases:
-	 * - Other port is in diagnostic mode
-	 * - Previously loaded function on the engine is not compliant with
-	 *   the requester.
-	 * - MFW cannot cope with the requester's DRV_MFW_HSI_VERSION.
-	 *      -
+	OSAL_MEM_ZERO(&out_params, sizeof(out_params));
+	rc = __ecore_mcp_load_req(p_hwfn, p_ptt, &in_params, &out_params);
+	if (rc != ECORE_SUCCESS)
+		return rc;
+
+	/* First handle cases where another load request should/might be sent:
+	 * - MFW expects the old interface [HSI version = 1]
+	 * - MFW responds that a force load request is required
 	 */
-	if (!(*p_load_code) ||
-	    ((*p_load_code) == FW_MSG_CODE_DRV_LOAD_REFUSED_HSI) ||
-	    ((*p_load_code) == FW_MSG_CODE_DRV_LOAD_REFUSED_PDA) ||
-	    ((*p_load_code) == FW_MSG_CODE_DRV_LOAD_REFUSED_DIAG)) {
-		DP_ERR(p_hwfn, "MCP refused load request, aborting\n");
+	if (out_params.load_code == FW_MSG_CODE_DRV_LOAD_REFUSED_HSI_1) {
+		DP_INFO(p_hwfn,
+			"MFW refused a load request due to HSI > 1. Resending with HSI = 1.\n");
+
+		/* The previous load request set the mailbox blocking */
+		p_hwfn->mcp_info->block_mb_sending = false;
+
+		in_params.hsi_ver = ECORE_LOAD_REQ_HSI_VER_1;
+		OSAL_MEM_ZERO(&out_params, sizeof(out_params));
+		rc = __ecore_mcp_load_req(p_hwfn, p_ptt, &in_params,
+					  &out_params);
+		if (rc != ECORE_SUCCESS)
+			return rc;
+	} else if (out_params.load_code ==
+		   FW_MSG_CODE_DRV_LOAD_REFUSED_REQUIRES_FORCE) {
+		/* The previous load request set the mailbox blocking */
+		p_hwfn->mcp_info->block_mb_sending = false;
+
+		if (ecore_mcp_can_force_load(in_params.drv_role,
+					     out_params.exist_drv_role)) {
+			DP_INFO(p_hwfn,
+				"A force load is required [existing: role %d, fw_ver 0x%08x, drv_ver 0x%08x_0x%08x]. Sending a force load request.\n",
+				out_params.exist_drv_role,
+				out_params.exist_fw_ver,
+				out_params.exist_drv_ver_0,
+				out_params.exist_drv_ver_1);
+
+			rc = ecore_get_mfw_force_cmd(p_hwfn,
+						     ECORE_LOAD_REQ_FORCE_ALL,
+						     &mfw_force_cmd);
+			if (rc != ECORE_SUCCESS)
+				return rc;
+
+			in_params.force_cmd = mfw_force_cmd;
+			OSAL_MEM_ZERO(&out_params, sizeof(out_params));
+			rc = __ecore_mcp_load_req(p_hwfn, p_ptt, &in_params,
+						  &out_params);
+			if (rc != ECORE_SUCCESS)
+				return rc;
+		} else {
+			DP_NOTICE(p_hwfn, false,
+				  "A force load is required [existing: role %d, fw_ver 0x%08x, drv_ver 0x%08x_0x%08x]. Avoiding to prevent disruption of active PFs.\n",
+				  out_params.exist_drv_role,
+				  out_params.exist_fw_ver,
+				  out_params.exist_drv_ver_0,
+				  out_params.exist_drv_ver_1);
+
+			ecore_mcp_cancel_load_req(p_hwfn, p_ptt);
+			return ECORE_BUSY;
+		}
+	}
+
+	/* Now handle the other types of responses.
+	 * The "REFUSED_HSI_1" and "REFUSED_REQUIRES_FORCE" responses are not
+	 * expected here after the additional revised load requests were sent.
+	 */
+	switch (out_params.load_code) {
+	case FW_MSG_CODE_DRV_LOAD_ENGINE:
+	case FW_MSG_CODE_DRV_LOAD_PORT:
+	case FW_MSG_CODE_DRV_LOAD_FUNCTION:
+		if (out_params.mfw_hsi_ver != ECORE_LOAD_REQ_HSI_VER_1 &&
+		    out_params.drv_exists) {
+			/* The role and fw/driver version match, but the PF is
+			 * already loaded and has not been unloaded gracefully.
+			 * This is unexpected since a quasi-FLR request was
+			 * previously sent as part of ecore_hw_prepare().
+			 */
+			DP_NOTICE(p_hwfn, false,
+				  "PF is already loaded - shouldn't have got here since a quasi-FLR request was previously sent!\n");
+			return ECORE_INVAL;
+		}
+		break;
+	case FW_MSG_CODE_DRV_LOAD_REFUSED_PDA:
+	case FW_MSG_CODE_DRV_LOAD_REFUSED_DIAG:
+	case FW_MSG_CODE_DRV_LOAD_REFUSED_HSI:
+	case FW_MSG_CODE_DRV_LOAD_REFUSED_REJECT:
+		DP_NOTICE(p_hwfn, false,
+			  "MFW refused a load request [resp 0x%08x]. Aborting.\n",
+			  out_params.load_code);
 		return ECORE_BUSY;
+	default:
+		DP_NOTICE(p_hwfn, false,
+			  "Unexpected response to load request [resp 0x%08x]. Aborting.\n",
+			  out_params.load_code);
+		break;
 	}
 
+	p_params->load_code = out_params.load_code;
+
 	return ECORE_SUCCESS;
 }
 
diff --git a/drivers/net/qede/base/ecore_mcp.h b/drivers/net/qede/base/ecore_mcp.h
index 7a81516..4138a12 100644
--- a/drivers/net/qede/base/ecore_mcp.h
+++ b/drivers/net/qede/base/ecore_mcp.h
@@ -136,32 +136,36 @@ enum _ecore_status_t ecore_mcp_handle_events(struct ecore_hwfn *p_hwfn,
  * @param p_hwfn - hw function
  * @param p_ptt - PTT required for register access
  * @return enum _ecore_status_t - ECORE_SUCCESS - operation
- * was successul.
+ * was successful.
  */
 enum _ecore_status_t ecore_issue_pulse(struct ecore_hwfn *p_hwfn,
 				       struct ecore_ptt *p_ptt);
 
+enum ecore_drv_role {
+	ECORE_DRV_ROLE_OS,
+	ECORE_DRV_ROLE_KDUMP,
+};
+
+struct ecore_load_req_params {
+	enum ecore_drv_role drv_role;
+	u8 timeout_val; /* 1..254, '0' - default value, '255' - no timeout */
+	bool avoid_eng_reset;
+	u32 load_code;
+};
+
 /**
- * @brief Sends a LOAD_REQ to the MFW, and in case operation
- *        succeed, returns whether this PF is the first on the
- *        chip/engine/port or function. This function should be
- *        called when driver is ready to accept MFW events after
- *        Storms initializations are done.
- *
- * @param p_hwfn       - hw function
- * @param p_ptt        - PTT required for register access
- * @param p_load_code  - The MCP response param containing one
- *      of the following:
- *      FW_MSG_CODE_DRV_LOAD_ENGINE
- *      FW_MSG_CODE_DRV_LOAD_PORT
- *      FW_MSG_CODE_DRV_LOAD_FUNCTION
- * @return enum _ecore_status_t -
- *      ECORE_SUCCESS - Operation was successul.
- *      ECORE_BUSY - Operation failed
+ * @brief Sends a LOAD_REQ to the MFW, and in case the operation succeeds,
+ *        returns whether this PF is the first on the engine/port or function.
+ *
+ * @param p_hwfn
+ * @param p_pt
+ * @param p_params
+ *
+ * @return enum _ecore_status_t - ECORE_SUCCESS - Operation was successful.
  */
 enum _ecore_status_t ecore_mcp_load_req(struct ecore_hwfn *p_hwfn,
 					struct ecore_ptt *p_ptt,
-					u32 *p_load_code);
+					struct ecore_load_req_params *p_params);
 
 /**
  * @brief Read the MFW mailbox into Current buffer.
diff --git a/drivers/net/qede/base/mcp_public.h b/drivers/net/qede/base/mcp_public.h
index d3cbc96..7f94ba1 100644
--- a/drivers/net/qede/base/mcp_public.h
+++ b/drivers/net/qede/base/mcp_public.h
@@ -878,9 +878,11 @@ struct public_func {
 #define DRV_ID_PDA_COMP_VER_MASK	0x0000ffff
 #define DRV_ID_PDA_COMP_VER_SHIFT	0
 
+#define LOAD_REQ_HSI_VERSION		2
 #define DRV_ID_MCP_HSI_VER_MASK		0x00ff0000
 #define DRV_ID_MCP_HSI_VER_SHIFT	16
-#define DRV_ID_MCP_HSI_VER_CURRENT	(1 << DRV_ID_MCP_HSI_VER_SHIFT)
+#define DRV_ID_MCP_HSI_VER_CURRENT	(LOAD_REQ_HSI_VERSION << \
+					 DRV_ID_MCP_HSI_VER_SHIFT)
 
 #define DRV_ID_DRV_TYPE_MASK		0x7f000000
 #define DRV_ID_DRV_TYPE_SHIFT		24
@@ -1040,8 +1042,47 @@ struct resource_info {
 #define RESOURCE_ELEMENT_STRICT (1 << 0)
 };
 
+#define DRV_ROLE_NONE		0
+#define DRV_ROLE_PREBOOT	1
+#define DRV_ROLE_OS		2
+#define DRV_ROLE_KDUMP		3
+
+struct load_req_stc {
+	u32 drv_ver_0;
+	u32 drv_ver_1;
+	u32 fw_ver;
+	u32 misc0;
+#define LOAD_REQ_ROLE_MASK		0x000000FF
+#define LOAD_REQ_ROLE_SHIFT		0
+#define LOAD_REQ_LOCK_TO_MASK		0x0000FF00
+#define LOAD_REQ_LOCK_TO_SHIFT		8
+#define LOAD_REQ_LOCK_TO_DEFAULT	0
+#define LOAD_REQ_LOCK_TO_NONE		255
+#define LOAD_REQ_FORCE_MASK		0x000F0000
+#define LOAD_REQ_FORCE_SHIFT		16
+#define LOAD_REQ_FORCE_NONE		0
+#define LOAD_REQ_FORCE_PF		1
+#define LOAD_REQ_FORCE_ALL		2
+#define LOAD_REQ_FLAGS0_MASK		0x00F00000
+#define LOAD_REQ_FLAGS0_SHIFT		20
+#define LOAD_REQ_FLAGS0_AVOID_RESET	(0x1 << 0)
+};
+
+struct load_rsp_stc {
+	u32 drv_ver_0;
+	u32 drv_ver_1;
+	u32 fw_ver;
+	u32 misc0;
+#define LOAD_RSP_ROLE_MASK		0x000000FF
+#define LOAD_RSP_ROLE_SHIFT		0
+#define LOAD_RSP_HSI_MASK		0x0000FF00
+#define LOAD_RSP_HSI_SHIFT		8
+#define LOAD_RSP_FLAGS0_MASK		0x000F0000
+#define LOAD_RSP_FLAGS0_SHIFT		16
+#define LOAD_RSP_FLAGS0_DRV_EXISTS	(0x1 << 0)
+};
+
 union drv_union_data {
-	u32 ver_str[MCP_DRV_VER_STR_SIZE_DWORD];    /* LOAD_REQ */
 	struct mcp_mac wol_mac; /* UNLOAD_DONE */
 
 /* This configuration should be set by the driver for the LINK_SET command. */
@@ -1068,6 +1109,9 @@ union drv_union_data {
 	struct bist_nvm_image_att nvm_image_att;
 	struct mdump_config_stc mdump_config;
 	u32 dword;
+
+	struct load_req_stc load_req;
+	struct load_rsp_stc load_rsp;
 	/* ... */
 };
 
@@ -1077,6 +1121,7 @@ struct public_drv_mb {
 #define DRV_MSG_CODE_LOAD_REQ                   0x10000000
 #define DRV_MSG_CODE_LOAD_DONE                  0x11000000
 #define DRV_MSG_CODE_INIT_HW                    0x12000000
+#define DRV_MSG_CODE_CANCEL_LOAD_REQ            0x13000000
 #define DRV_MSG_CODE_UNLOAD_REQ		        0x20000000
 #define DRV_MSG_CODE_UNLOAD_DONE                0x21000000
 #define DRV_MSG_CODE_INIT_PHY			0x22000000
@@ -1448,8 +1493,11 @@ struct public_drv_mb {
 #define FW_MSG_CODE_DRV_LOAD_PORT               0x10110000
 #define FW_MSG_CODE_DRV_LOAD_FUNCTION           0x10120000
 #define FW_MSG_CODE_DRV_LOAD_REFUSED_PDA        0x10200000
-#define FW_MSG_CODE_DRV_LOAD_REFUSED_HSI        0x10210000
+#define FW_MSG_CODE_DRV_LOAD_REFUSED_HSI_1      0x10210000
 #define FW_MSG_CODE_DRV_LOAD_REFUSED_DIAG       0x10220000
+#define FW_MSG_CODE_DRV_LOAD_REFUSED_HSI        0x10230000
+#define FW_MSG_CODE_DRV_LOAD_REFUSED_REQUIRES_FORCE 0x10300000
+#define FW_MSG_CODE_DRV_LOAD_REFUSED_REJECT     0x10310000
 #define FW_MSG_CODE_DRV_LOAD_DONE               0x11100000
 #define FW_MSG_CODE_DRV_UNLOAD_ENGINE           0x20110000
 #define FW_MSG_CODE_DRV_UNLOAD_PORT             0x20120000
@@ -1547,7 +1595,7 @@ struct public_drv_mb {
 
 
 	u32 fw_mb_param;
-	/* Resource Allocation params - MFW  version support*/
+/* Resource Allocation params - MFW  version support */
 #define FW_MB_PARAM_RESOURCE_ALLOC_VERSION_MAJOR_MASK	0xFFFF0000
 #define FW_MB_PARAM_RESOURCE_ALLOC_VERSION_MAJOR_SHIFT		16
 #define FW_MB_PARAM_RESOURCE_ALLOC_VERSION_MINOR_MASK	0x0000FFFF
diff --git a/drivers/net/qede/qede_main.c b/drivers/net/qede/qede_main.c
index 5c79055..326e56f 100644
--- a/drivers/net/qede/qede_main.c
+++ b/drivers/net/qede/qede_main.c
@@ -276,6 +276,8 @@ static int qed_slowpath_start(struct ecore_dev *edev,
 	hw_init_params.int_mode = ECORE_INT_MODE_MSIX;
 	hw_init_params.allow_npar_tx_switch = allow_npar_tx_switching;
 	hw_init_params.bin_fw_data = data;
+	hw_init_params.mfw_timeout_val = ECORE_LOAD_REQ_LOCK_TO_DEFAULT;
+	hw_init_params.avoid_eng_reset = false;
 	rc = ecore_hw_init(edev, &hw_init_params);
 	if (rc) {
 		DP_ERR(edev, "ecore_hw_init failed\n");
-- 
1.7.10.3