octeon_ep: support to fetch firmware info

Add support to fetch firmware info such as heartbeat miss count,
heartbeat interval. This shall be used for heartbeat monitor.

Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: shinas-marvell

drivers/net/ethernet/marvell/octeon_ep/octep_cn9k_pf.c

@@ -16,9 +16,6 @@
 #define CTRL_MBOX_MAX_PF	128
 #define CTRL_MBOX_SZ		((size_t)(0x400000 / CTRL_MBOX_MAX_PF))
 
-#define FW_HB_INTERVAL_IN_SECS		1
-#define FW_HB_MISS_COUNT		10
-
 /* Names of Hardware non-queue generic interrupts */
 static char *cn93_non_ioq_msix_names[] = {
 	"epf_ire_rint",
@@ -250,12 +247,11 @@ static void octep_init_config_cn93_pf(struct octep_device *oct)
 		link = PCI_DEVFN(PCI_SLOT(oct->pdev->devfn), link);
 	}
 	conf->ctrl_mbox_cfg.barmem_addr = (void __iomem *)oct->mmio[2].hw_addr +
-					   (0x400000ull * 7) +
+					   CN93_PEM_BAR4_INDEX_OFFSET +
 					   (link * CTRL_MBOX_SZ);
 
-	conf->hb_interval = FW_HB_INTERVAL_IN_SECS;
-	conf->max_hb_miss_cnt = FW_HB_MISS_COUNT;
-
+	conf->fw_info.hb_interval = OCTEP_DEFAULT_FW_HB_INTERVAL;
+	conf->fw_info.hb_miss_count = OCTEP_DEFAULT_FW_HB_MISS_COUNT;
 }
 
 /* Setup registers for a hardware Tx Queue  */

drivers/net/ethernet/marvell/octeon_ep/octep_config.h

@@ -49,6 +49,11 @@
 /* Default MTU */
 #define OCTEP_DEFAULT_MTU    1500
 
+/* pf heartbeat interval in milliseconds */
+#define OCTEP_DEFAULT_FW_HB_INTERVAL           1000
+/* pf heartbeat miss count */
+#define OCTEP_DEFAULT_FW_HB_MISS_COUNT         20
+
 /* Macros to get octeon config params */
 #define CFG_GET_IQ_CFG(cfg)             ((cfg)->iq)
 #define CFG_GET_IQ_NUM_DESC(cfg)        ((cfg)->iq.num_descs)
@@ -181,6 +186,16 @@ struct octep_ctrl_mbox_config {
 	void __iomem *barmem_addr;
 };
 
+/* Info from firmware */
+struct octep_fw_info {
+	/* interface pkind */
+	u16 pkind;
+	/* heartbeat interval in milliseconds */
+	u16 hb_interval;
+	/* heartbeat miss count */
+	u16 hb_miss_count;
+};
+
 /* Data Structure to hold configuration limits and active config */
 struct octep_config {
 	/* Input Queue attributes. */
@@ -201,10 +216,7 @@ struct octep_config {
 	/* ctrl mbox config */
 	struct octep_ctrl_mbox_config ctrl_mbox_cfg;
 
-	/* Configured maximum heartbeat miss count */
-	u32 max_hb_miss_cnt;
-
-	/* Configured firmware heartbeat interval in secs */
-	u32 hb_interval;
+	/* fw info */
+	struct octep_fw_info fw_info;
 };
 #endif /* _OCTEP_CONFIG_H_ */

drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.c

@@ -26,7 +26,7 @@ static atomic_t ctrl_net_msg_id;
 
 /* Control plane version in which OCTEP_CTRL_NET_H2F_CMD was added */
 static const u32 octep_ctrl_net_h2f_cmd_versions[OCTEP_CTRL_NET_H2F_CMD_MAX] = {
-	[OCTEP_CTRL_NET_H2F_CMD_INVALID ... OCTEP_CTRL_NET_H2F_CMD_LINK_INFO] =
+	[OCTEP_CTRL_NET_H2F_CMD_INVALID ... OCTEP_CTRL_NET_H2F_CMD_GET_INFO] =
 	 OCTEP_CP_VERSION(1, 0, 0)
 };
 
@@ -353,6 +353,28 @@ void octep_ctrl_net_recv_fw_messages(struct octep_device *oct)
 	}
 }
 
+int octep_ctrl_net_get_info(struct octep_device *oct, int vfid,
+			    struct octep_fw_info *info)
+{
+	struct octep_ctrl_net_wait_data d = {0};
+	struct octep_ctrl_net_h2f_resp *resp;
+	struct octep_ctrl_net_h2f_req *req;
+	int err;
+
+	req = &d.data.req;
+	init_send_req(&d.msg, req, 0, vfid);
+	req->hdr.s.cmd = OCTEP_CTRL_NET_H2F_CMD_GET_INFO;
+	req->link_info.cmd = OCTEP_CTRL_NET_CMD_GET;
+	err = octep_send_mbox_req(oct, &d, true);
+	if (err < 0)
+		return err;
+
+	resp = &d.data.resp;
+	memcpy(info, &resp->info.fw_info, sizeof(struct octep_fw_info));
+
+	return 0;
+}
+
 int octep_ctrl_net_uninit(struct octep_device *oct)
 {
 	struct octep_ctrl_net_wait_data *pos, *n;

drivers/net/ethernet/marvell/octeon_ep/octep_ctrl_net.h

@@ -41,6 +41,7 @@ enum octep_ctrl_net_h2f_cmd {
 	OCTEP_CTRL_NET_H2F_CMD_LINK_STATUS,
 	OCTEP_CTRL_NET_H2F_CMD_RX_STATE,
 	OCTEP_CTRL_NET_H2F_CMD_LINK_INFO,
+	OCTEP_CTRL_NET_H2F_CMD_GET_INFO,
 	OCTEP_CTRL_NET_H2F_CMD_MAX
 };
 
@@ -161,6 +162,11 @@ struct octep_ctrl_net_h2f_resp_cmd_state {
 	u16 state;
 };
 
+/* get info request */
+struct octep_ctrl_net_h2f_resp_cmd_get_info {
+	struct octep_fw_info fw_info;
+};
+
 /* Host to fw response data */
 struct octep_ctrl_net_h2f_resp {
 	union octep_ctrl_net_resp_hdr hdr;
@@ -171,6 +177,7 @@ struct octep_ctrl_net_h2f_resp {
 		struct octep_ctrl_net_h2f_resp_cmd_state link;
 		struct octep_ctrl_net_h2f_resp_cmd_state rx;
 		struct octep_ctrl_net_link_info link_info;
+		struct octep_ctrl_net_h2f_resp_cmd_get_info info;
 	};
 } __packed;
 
@@ -330,6 +337,17 @@ int octep_ctrl_net_set_link_info(struct octep_device *oct,
  */
 void octep_ctrl_net_recv_fw_messages(struct octep_device *oct);
 
+/** Get info from firmware.
+ *
+ * @param oct: non-null pointer to struct octep_device.
+ * @param vfid: Index of virtual function.
+ * @param info: non-null pointer to struct octep_fw_info.
+ *
+ * return value: 0 on success, -errno on failure.
+ */
+int octep_ctrl_net_get_info(struct octep_device *oct, int vfid,
+			    struct octep_fw_info *info);
+
 /** Uninitialize data for ctrl net.
  *
  * @param oct: non-null pointer to struct octep_device.

drivers/net/ethernet/marvell/octeon_ep/octep_main.c

@@ -918,9 +918,9 @@ static void octep_hb_timeout_task(struct work_struct *work)
 	int miss_cnt;
 
 	miss_cnt = atomic_inc_return(&oct->hb_miss_cnt);
-	if (miss_cnt < oct->conf->max_hb_miss_cnt) {
+	if (miss_cnt < oct->conf->fw_info.hb_miss_count) {
 		queue_delayed_work(octep_wq, &oct->hb_task,
-				   msecs_to_jiffies(oct->conf->hb_interval * 1000));
+				   msecs_to_jiffies(oct->conf->fw_info.hb_interval));
 		return;
 	}
 
@@ -1013,8 +1013,7 @@ int octep_device_setup(struct octep_device *oct)
 
 	atomic_set(&oct->hb_miss_cnt, 0);
 	INIT_DELAYED_WORK(&oct->hb_task, octep_hb_timeout_task);
-	queue_delayed_work(octep_wq, &oct->hb_task,
-			   msecs_to_jiffies(oct->conf->hb_interval * 1000));
+
 	return 0;
 
 unsupported_dev:
@@ -1143,6 +1142,15 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		dev_err(&pdev->dev, "Device setup failed\n");
 		goto err_octep_config;
 	}
+
+	octep_ctrl_net_get_info(octep_dev, OCTEP_CTRL_NET_INVALID_VFID,
+				&octep_dev->conf->fw_info);
+	dev_info(&octep_dev->pdev->dev, "Heartbeat interval %u msecs Heartbeat miss count %u\n",
+		 octep_dev->conf->fw_info.hb_interval,
+		 octep_dev->conf->fw_info.hb_miss_count);
+	queue_delayed_work(octep_wq, &octep_dev->hb_task,
+			   msecs_to_jiffies(octep_dev->conf->fw_info.hb_interval));
+
 	INIT_WORK(&octep_dev->tx_timeout_task, octep_tx_timeout_task);
 	INIT_WORK(&octep_dev->ctrl_mbox_task, octep_ctrl_mbox_task);
 	INIT_DELAYED_WORK(&octep_dev->intr_poll_task, octep_intr_poll_task);

drivers/net/ethernet/marvell/octeon_ep/octep_regs_cn9k_pf.h

@@ -370,4 +370,8 @@
 /* bit 1 for firmware heartbeat interrupt */
 #define CN93_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT	BIT_ULL(1)
 
+#define CN93_PEM_BAR4_INDEX            7
+#define CN93_PEM_BAR4_INDEX_SIZE       0x400000ULL
+#define CN93_PEM_BAR4_INDEX_OFFSET     (CN93_PEM_BAR4_INDEX * CN93_PEM_BAR4_INDEX_SIZE)
+
 #endif /* _OCTEP_REGS_CN9K_PF_H_ */