liquidio: Added ndo_get_vf_stats support

Added the ndo to gather VF statistics through the PF.

Collect VF statistics via mailbox from VF.
Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c

@@ -1497,3 +1497,57 @@ void cn23xx_tell_vf_its_macaddr_changed(struct octeon_device *oct, int vfidx,
 		octeon_mbox_write(oct, &mbox_cmd);
 	}
 }
+
+static void
+cn23xx_get_vf_stats_callback(struct octeon_device *oct,
+			     struct octeon_mbox_cmd *cmd, void *arg)
+{
+	struct oct_vf_stats_ctx *ctx = arg;
+
+	memcpy(ctx->stats, cmd->data, sizeof(struct oct_vf_stats));
+	atomic_set(&ctx->status, 1);
+}
+
+int cn23xx_get_vf_stats(struct octeon_device *oct, int vfidx,
+			struct oct_vf_stats *stats)
+{
+	u32 timeout = HZ; // 1sec
+	struct octeon_mbox_cmd mbox_cmd;
+	struct oct_vf_stats_ctx ctx;
+	u32 count = 0, ret;
+
+	if (!(oct->sriov_info.vf_drv_loaded_mask & (1ULL << vfidx)))
+		return -1;
+
+	if (sizeof(struct oct_vf_stats) > sizeof(mbox_cmd.data))
+		return -1;
+
+	mbox_cmd.msg.u64 = 0;
+	mbox_cmd.msg.s.type = OCTEON_MBOX_REQUEST;
+	mbox_cmd.msg.s.resp_needed = 1;
+	mbox_cmd.msg.s.cmd = OCTEON_GET_VF_STATS;
+	mbox_cmd.msg.s.len = 1;
+	mbox_cmd.q_no = vfidx * oct->sriov_info.rings_per_vf;
+	mbox_cmd.recv_len = 0;
+	mbox_cmd.recv_status = 0;
+	mbox_cmd.fn = (octeon_mbox_callback_t)cn23xx_get_vf_stats_callback;
+	ctx.stats = stats;
+	atomic_set(&ctx.status, 0);
+	mbox_cmd.fn_arg = (void *)&ctx;
+	memset(mbox_cmd.data, 0, sizeof(mbox_cmd.data));
+	octeon_mbox_write(oct, &mbox_cmd);
+
+	do {
+		schedule_timeout_uninterruptible(1);
+	} while ((atomic_read(&ctx.status) == 0) && (count++ < timeout));
+
+	ret = atomic_read(&ctx.status);
+	if (ret == 0) {
+		octeon_mbox_cancel(oct, 0);
+		dev_err(&oct->pci_dev->dev, "Unable to get stats from VF-%d, timedout\n",
+			vfidx);
+		return -1;
+	}
+
+	return 0;
+}

drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.h

@@ -43,6 +43,15 @@ struct octeon_cn23xx_pf {
 
 #define CN23XX_SLI_DEF_BP			0x40
 
+struct oct_vf_stats {
+	u64 rx_packets;
+	u64 tx_packets;
+	u64 rx_bytes;
+	u64 tx_bytes;
+	u64 broadcast;
+	u64 multicast;
+};
+
 int setup_cn23xx_octeon_pf_device(struct octeon_device *oct);
 
 int validate_cn23xx_pf_config_info(struct octeon_device *oct,
@@ -56,4 +65,7 @@ int cn23xx_fw_loaded(struct octeon_device *oct);
 
 void cn23xx_tell_vf_its_macaddr_changed(struct octeon_device *oct, int vfidx,
 					u8 *mac);
+
+int cn23xx_get_vf_stats(struct octeon_device *oct, int ifidx,
+			struct oct_vf_stats *stats);
 #endif

drivers/net/ethernet/cavium/liquidio/lio_main.c

@@ -3326,6 +3326,31 @@ static const struct switchdev_ops lio_pf_switchdev_ops = {
 	.switchdev_port_attr_get = lio_pf_switchdev_attr_get,
 };
 
+static int liquidio_get_vf_stats(struct net_device *netdev, int vfidx,
+				 struct ifla_vf_stats *vf_stats)
+{
+	struct lio *lio = GET_LIO(netdev);
+	struct octeon_device *oct = lio->oct_dev;
+	struct oct_vf_stats stats;
+	int ret;
+
+	if (vfidx < 0 || vfidx >= oct->sriov_info.num_vfs_alloced)
+		return -EINVAL;
+
+	memset(&stats, 0, sizeof(struct oct_vf_stats));
+	ret = cn23xx_get_vf_stats(oct, vfidx, &stats);
+	if (!ret) {
+		vf_stats->rx_packets = stats.rx_packets;
+		vf_stats->tx_packets = stats.tx_packets;
+		vf_stats->rx_bytes = stats.rx_bytes;
+		vf_stats->tx_bytes = stats.tx_bytes;
+		vf_stats->broadcast = stats.broadcast;
+		vf_stats->multicast = stats.multicast;
+	}
+
+	return ret;
+}
+
 static const struct net_device_ops lionetdevops = {
 	.ndo_open		= liquidio_open,
 	.ndo_stop		= liquidio_stop,
@@ -3348,6 +3373,7 @@ static const struct net_device_ops lionetdevops = {
 	.ndo_get_vf_config	= liquidio_get_vf_config,
 	.ndo_set_vf_trust	= liquidio_set_vf_trust,
 	.ndo_set_vf_link_state  = liquidio_set_vf_link_state,
+	.ndo_get_vf_stats	= liquidio_get_vf_stats,
 };
 
 /** \brief Entry point for the liquidio module

drivers/net/ethernet/cavium/liquidio/octeon_mailbox.c

@@ -24,6 +24,7 @@
 #include "octeon_device.h"
 #include "octeon_main.h"
 #include "octeon_mailbox.h"
+#include "cn23xx_pf_device.h"
 
 /**
  * octeon_mbox_read:
@@ -205,6 +206,26 @@ int octeon_mbox_write(struct octeon_device *oct,
 	return ret;
 }
 
+static void get_vf_stats(struct octeon_device *oct,
+			 struct oct_vf_stats *stats)
+{
+	int i;
+
+	for (i = 0; i < oct->num_iqs; i++) {
+		if (!oct->instr_queue[i])
+			continue;
+		stats->tx_packets += oct->instr_queue[i]->stats.tx_done;
+		stats->tx_bytes += oct->instr_queue[i]->stats.tx_tot_bytes;
+	}
+
+	for (i = 0; i < oct->num_oqs; i++) {
+		if (!oct->droq[i])
+			continue;
+		stats->rx_packets += oct->droq[i]->stats.rx_pkts_received;
+		stats->rx_bytes += oct->droq[i]->stats.rx_bytes_received;
+	}
+}
+
 /**
  * octeon_mbox_process_cmd:
  * @mbox: Pointer mailbox
@@ -250,6 +271,15 @@ static int octeon_mbox_process_cmd(struct octeon_mbox *mbox,
 						     mbox_cmd->msg.s.params);
 		break;
 
+	case OCTEON_GET_VF_STATS:
+		dev_dbg(&oct->pci_dev->dev, "Got VF stats request. Sending data back\n");
+		mbox_cmd->msg.s.type = OCTEON_MBOX_RESPONSE;
+		mbox_cmd->msg.s.resp_needed = 1;
+		mbox_cmd->msg.s.len = 1 +
+			sizeof(struct oct_vf_stats) / sizeof(u64);
+		get_vf_stats(oct, (struct oct_vf_stats *)mbox_cmd->data);
+		octeon_mbox_write(oct, mbox_cmd);
+		break;
 	default:
 		break;
 	}
@@ -322,3 +352,25 @@ int octeon_mbox_process_message(struct octeon_mbox *mbox)
 
 	return 0;
 }
+
+int octeon_mbox_cancel(struct octeon_device *oct, int q_no)
+{
+	struct octeon_mbox *mbox = oct->mbox[q_no];
+	struct octeon_mbox_cmd *mbox_cmd;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&mbox->lock, flags);
+	mbox_cmd = &mbox->mbox_resp;
+
+	if (!(mbox->state & OCTEON_MBOX_STATE_RESPONSE_PENDING)) {
+		spin_unlock_irqrestore(&mbox->lock, flags);
+		return 1;
+	}
+
+	mbox->state = OCTEON_MBOX_STATE_IDLE;
+	memset(mbox_cmd, 0, sizeof(*mbox_cmd));
+	writeq(OCTEON_PFVFSIG, mbox->mbox_read_reg);
+	spin_unlock_irqrestore(&mbox->lock, flags);
+
+	return 0;
+}

drivers/net/ethernet/cavium/liquidio/octeon_mailbox.h

@@ -25,6 +25,7 @@
 #define OCTEON_VF_ACTIVE		0x1
 #define OCTEON_VF_FLR_REQUEST		0x2
 #define OCTEON_PF_CHANGED_VF_MACADDR	0x4
+#define OCTEON_GET_VF_STATS		0x8
 
 /*Macro for Read acknowldgement*/
 #define OCTEON_PFVFACK			0xffffffffffffffffULL
@@ -107,9 +108,15 @@ struct octeon_mbox {
 
 };
 
+struct oct_vf_stats_ctx {
+	atomic_t status;
+	struct oct_vf_stats *stats;
+};
+
 int octeon_mbox_read(struct octeon_mbox *mbox);
 int octeon_mbox_write(struct octeon_device *oct,
 		      struct octeon_mbox_cmd *mbox_cmd);
 int octeon_mbox_process_message(struct octeon_mbox *mbox);
+int octeon_mbox_cancel(struct octeon_device *oct, int q_no);
 
 #endif