qed: IOV configure and FLR

While previous patches have already added the necessary logic to probe
VFs as well as enabling them in the HW, this patch adds the ability to
support VF FLR & SRIOV disable.

It then wraps both flows together into the first IOV callback to be
provided to the protocol driver - `configure'. This would later to be used
to enable and disable SRIOV in the adapter.

Signed-off-by: Yuval Mintz <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Yuval Mintz

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -31,6 +31,7 @@
 #include "qed_reg_addr.h"
 #include "qed_sp.h"
 #include "qed_sriov.h"
+#include "qed_vf.h"
 
 /* API common to all protocols */
 enum BAR_ID {
@@ -420,15 +421,17 @@ void qed_resc_setup(struct qed_dev *cdev)
 #define FINAL_CLEANUP_POLL_CNT          (100)
 #define FINAL_CLEANUP_POLL_TIME         (10)
 int qed_final_cleanup(struct qed_hwfn *p_hwfn,
-		      struct qed_ptt *p_ptt,
-		      u16 id)
+		      struct qed_ptt *p_ptt, u16 id, bool is_vf)
 {
 	u32 command = 0, addr, count = FINAL_CLEANUP_POLL_CNT;
 	int rc = -EBUSY;
 
 	addr = GTT_BAR0_MAP_REG_USDM_RAM +
 		USTORM_FLR_FINAL_ACK_OFFSET(p_hwfn->rel_pf_id);
 
+	if (is_vf)
+		id += 0x10;
+
 	command |= X_FINAL_CLEANUP_AGG_INT <<
 		SDM_AGG_INT_COMP_PARAMS_AGG_INT_INDEX_SHIFT;
 	command |= 1 << SDM_AGG_INT_COMP_PARAMS_AGG_VECTOR_ENABLE_SHIFT;
@@ -663,7 +666,7 @@ static int qed_hw_init_pf(struct qed_hwfn *p_hwfn,
 	STORE_RT_REG(p_hwfn, PRS_REG_SEARCH_ROCE_RT_OFFSET, 0);
 
 	/* Cleanup chip from previous driver if such remains exist */
-	rc = qed_final_cleanup(p_hwfn, p_ptt, rel_pf_id);
+	rc = qed_final_cleanup(p_hwfn, p_ptt, rel_pf_id, false);
 	if (rc != 0)
 		return rc;
 
@@ -880,7 +883,7 @@ int qed_hw_stop(struct qed_dev *cdev)
 		DP_VERBOSE(p_hwfn, NETIF_MSG_IFDOWN, "Stopping hw/fw\n");
 
 		if (IS_VF(cdev)) {
-			/* To be implemented in a later patch */
+			qed_vf_pf_int_cleanup(p_hwfn);
 			continue;
 		}
 
@@ -989,7 +992,9 @@ int qed_hw_reset(struct qed_dev *cdev)
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
 
 		if (IS_VF(cdev)) {
-			/* Will be implemented in a later patch */
+			rc = qed_vf_pf_reset(p_hwfn);
+			if (rc)
+				return rc;
 			continue;
 		}
 
@@ -1590,7 +1595,7 @@ void qed_hw_remove(struct qed_dev *cdev)
 		struct qed_hwfn *p_hwfn = &cdev->hwfns[i];
 
 		if (IS_VF(cdev)) {
-			/* Will be implemented in a later patch */
+			qed_vf_pf_release(p_hwfn);
 			continue;
 		}
 

drivers/net/ethernet/qlogic/qed/qed_dev_api.h

@@ -303,11 +303,11 @@ int qed_fw_rss_eng(struct qed_hwfn *p_hwfn,
  * @param p_hwfn
  * @param p_ptt
  * @param id - For PF, engine-relative. For VF, PF-relative.
+ * @param is_vf - true iff cleanup is made for a VF.
  *
  * @return int
  */
 int qed_final_cleanup(struct qed_hwfn *p_hwfn,
-		      struct qed_ptt *p_ptt,
-		      u16 id);
+		      struct qed_ptt *p_ptt, u16 id, bool is_vf);
 
 #endif

drivers/net/ethernet/qlogic/qed/qed_hsi.h

@@ -30,7 +30,7 @@ enum common_event_opcode {
 	COMMON_EVENT_PF_START,
 	COMMON_EVENT_PF_STOP,
 	COMMON_EVENT_VF_START,
-	COMMON_EVENT_RESERVED2,
+	COMMON_EVENT_VF_STOP,
 	COMMON_EVENT_VF_PF_CHANNEL,
 	COMMON_EVENT_RESERVED4,
 	COMMON_EVENT_RESERVED5,
@@ -45,7 +45,7 @@ enum common_ramrod_cmd_id {
 	COMMON_RAMROD_PF_START /* PF Function Start Ramrod */,
 	COMMON_RAMROD_PF_STOP /* PF Function Stop Ramrod */,
 	COMMON_RAMROD_VF_START,
-	COMMON_RAMROD_RESERVED2,
+	COMMON_RAMROD_VF_STOP,
 	COMMON_RAMROD_PF_UPDATE,
 	COMMON_RAMROD_EMPTY,
 	MAX_COMMON_RAMROD_CMD_ID
@@ -741,6 +741,13 @@ struct vf_start_ramrod_data {
 	u8 reserved[3];
 };
 
+struct vf_stop_ramrod_data {
+	u8 vf_id;
+	u8 reserved0;
+	__le16 reserved1;
+	__le32 reserved2;
+};
+
 struct atten_status_block {
 	__le32	atten_bits;
 	__le32	atten_ack;

drivers/net/ethernet/qlogic/qed/qed_l2.c

@@ -2066,8 +2066,15 @@ static int qed_fp_cqe_completion(struct qed_dev *dev,
 				      cqe);
 }
 
+#ifdef CONFIG_QED_SRIOV
+extern const struct qed_iov_hv_ops qed_iov_ops_pass;
+#endif
+
 static const struct qed_eth_ops qed_eth_ops_pass = {
 	.common = &qed_common_ops_pass,
+#ifdef CONFIG_QED_SRIOV
+	.iov = &qed_iov_ops_pass,
+#endif
 	.fill_dev_info = &qed_fill_eth_dev_info,
 	.register_ops = &qed_register_eth_ops,
 	.vport_start = &qed_start_vport,

drivers/net/ethernet/qlogic/qed/qed_main.c

@@ -897,6 +897,7 @@ static int qed_slowpath_stop(struct qed_dev *cdev)
 
 	if (IS_PF(cdev)) {
 		qed_free_stream_mem(cdev);
+		qed_sriov_disable(cdev, true);
 
 		qed_nic_stop(cdev);
 		qed_slowpath_irq_free(cdev);

drivers/net/ethernet/qlogic/qed/qed_mcp.c

@@ -442,6 +442,75 @@ int qed_mcp_load_req(struct qed_hwfn *p_hwfn,
 	return 0;
 }
 
+static void qed_mcp_handle_vf_flr(struct qed_hwfn *p_hwfn,
+				  struct qed_ptt *p_ptt)
+{
+	u32 addr = SECTION_OFFSIZE_ADDR(p_hwfn->mcp_info->public_base,
+					PUBLIC_PATH);
+	u32 mfw_path_offsize = qed_rd(p_hwfn, p_ptt, addr);
+	u32 path_addr = SECTION_ADDR(mfw_path_offsize,
+				     QED_PATH_ID(p_hwfn));
+	u32 disabled_vfs[VF_MAX_STATIC / 32];
+	int i;
+
+	DP_VERBOSE(p_hwfn,
+		   QED_MSG_SP,
+		   "Reading Disabled VF information from [offset %08x], path_addr %08x\n",
+		   mfw_path_offsize, path_addr);
+
+	for (i = 0; i < (VF_MAX_STATIC / 32); i++) {
+		disabled_vfs[i] = qed_rd(p_hwfn, p_ptt,
+					 path_addr +
+					 offsetof(struct public_path,
+						  mcp_vf_disabled) +
+					 sizeof(u32) * i);
+		DP_VERBOSE(p_hwfn, (QED_MSG_SP | QED_MSG_IOV),
+			   "FLR-ed VFs [%08x,...,%08x] - %08x\n",
+			   i * 32, (i + 1) * 32 - 1, disabled_vfs[i]);
+	}
+
+	if (qed_iov_mark_vf_flr(p_hwfn, disabled_vfs))
+		qed_schedule_iov(p_hwfn, QED_IOV_WQ_FLR_FLAG);
+}
+
+int qed_mcp_ack_vf_flr(struct qed_hwfn *p_hwfn,
+		       struct qed_ptt *p_ptt, u32 *vfs_to_ack)
+{
+	u32 addr = SECTION_OFFSIZE_ADDR(p_hwfn->mcp_info->public_base,
+					PUBLIC_FUNC);
+	u32 mfw_func_offsize = qed_rd(p_hwfn, p_ptt, addr);
+	u32 func_addr = SECTION_ADDR(mfw_func_offsize,
+				     MCP_PF_ID(p_hwfn));
+	struct qed_mcp_mb_params mb_params;
+	union drv_union_data union_data;
+	int rc;
+	int i;
+
+	for (i = 0; i < (VF_MAX_STATIC / 32); i++)
+		DP_VERBOSE(p_hwfn, (QED_MSG_SP | QED_MSG_IOV),
+			   "Acking VFs [%08x,...,%08x] - %08x\n",
+			   i * 32, (i + 1) * 32 - 1, vfs_to_ack[i]);
+
+	memset(&mb_params, 0, sizeof(mb_params));
+	mb_params.cmd = DRV_MSG_CODE_VF_DISABLED_DONE;
+	memcpy(&union_data.ack_vf_disabled, vfs_to_ack, VF_MAX_STATIC / 8);
+	mb_params.p_data_src = &union_data;
+	rc = qed_mcp_cmd_and_union(p_hwfn, p_ptt, &mb_params);
+	if (rc) {
+		DP_NOTICE(p_hwfn, "Failed to pass ACK for VF flr to MFW\n");
+		return -EBUSY;
+	}
+
+	/* Clear the ACK bits */
+	for (i = 0; i < (VF_MAX_STATIC / 32); i++)
+		qed_wr(p_hwfn, p_ptt,
+		       func_addr +
+		       offsetof(struct public_func, drv_ack_vf_disabled) +
+		       i * sizeof(u32), 0);
+
+	return rc;
+}
+
 static void qed_mcp_handle_transceiver_change(struct qed_hwfn *p_hwfn,
 					      struct qed_ptt *p_ptt)
 {
@@ -753,6 +822,9 @@ int qed_mcp_handle_events(struct qed_hwfn *p_hwfn,
 		case MFW_DRV_MSG_LINK_CHANGE:
 			qed_mcp_handle_link_change(p_hwfn, p_ptt, false);
 			break;
+		case MFW_DRV_MSG_VF_DISABLED:
+			qed_mcp_handle_vf_flr(p_hwfn, p_ptt);
+			break;
 		case MFW_DRV_MSG_TRANSCEIVER_STATE_CHANGE:
 			qed_mcp_handle_transceiver_change(p_hwfn, p_ptt);
 			break;

drivers/net/ethernet/qlogic/qed/qed_mcp.h

@@ -392,6 +392,18 @@ int qed_mcp_load_req(struct qed_hwfn *p_hwfn,
 void qed_mcp_read_mb(struct qed_hwfn *p_hwfn,
 		     struct qed_ptt *p_ptt);
 
+/**
+ * @brief Ack to mfw that driver finished FLR process for VFs
+ *
+ * @param p_hwfn
+ * @param p_ptt
+ * @param vfs_to_ack - bit mask of all engine VFs for which the PF acks.
+ *
+ * @param return int - 0 upon success.
+ */
+int qed_mcp_ack_vf_flr(struct qed_hwfn *p_hwfn,
+		       struct qed_ptt *p_ptt, u32 *vfs_to_ack);
+
 /**
  * @brief - calls during init to read shmem of all function-related info.
  *

drivers/net/ethernet/qlogic/qed/qed_reg_addr.h

@@ -41,6 +41,8 @@
 	0x2aa16cUL
 #define PGLUE_B_REG_WAS_ERROR_VF_31_0_CLR \
 	0x2aa118UL
+#define PSWHST_REG_ZONE_PERMISSION_TABLE \
+	0x2a0800UL
 #define  BAR0_MAP_REG_MSDM_RAM \
 	0x1d00000UL
 #define  BAR0_MAP_REG_USDM_RAM \
@@ -79,6 +81,8 @@
 	0x2f2eb0UL
 #define  DORQ_REG_PF_DB_ENABLE \
 	0x100508UL
+#define DORQ_REG_VF_USAGE_CNT \
+	0x1009c4UL
 #define  QM_REG_PF_EN \
 	0x2f2ea4UL
 #define  TCFC_REG_STRONG_ENABLE_PF \
@@ -167,6 +171,10 @@
 	0x040200UL
 #define  PBF_REG_INIT \
 	0xd80000UL
+#define PBF_REG_NUM_BLOCKS_ALLOCATED_PROD_VOQ0 \
+	0xd806c8UL
+#define PBF_REG_NUM_BLOCKS_ALLOCATED_CONS_VOQ0 \
+	0xd806ccUL
 #define  PTU_REG_ATC_INIT_ARRAY \
 	0x560000UL
 #define  PCM_REG_INIT \
@@ -391,6 +399,8 @@
 	0x1d0000UL
 #define  IGU_REG_PF_CONFIGURATION \
 	0x180800UL
+#define IGU_REG_VF_CONFIGURATION \
+	0x180804UL
 #define  MISC_REG_AEU_ENABLE1_IGU_OUT_0 \
 	0x00849cUL
 #define MISC_REG_AEU_AFTER_INVERT_1_IGU	\

drivers/net/ethernet/qlogic/qed/qed_sp.h

@@ -64,6 +64,7 @@ union ramrod_data {
 	struct vport_filter_update_ramrod_data vport_filter_update;
 
 	struct vf_start_ramrod_data vf_start;
+	struct vf_stop_ramrod_data vf_stop;
 };
 
 #define EQ_MAX_CREDIT   0xffffffff