Merge branch 'ionic-vf-attr-replay-and-other-updates'

Shannon Nelson says:

====================
ionic: VF attr replay and other updates

For better VF management when a FW update restart or a FW crash recover is
detected, the PF now will replay any user specified VF attributes to be
sure the FW hasn't lost them in the restart.

Newer FW offers more packet processing offloads, so we now support them in
the driver.

A small refactor of the Rx buffer fill cleans a bit of code and will help
future work on buffer caching.
====================

Link: https://lore.kernel.org/r/20221026143744.11598-1-snelson@pensando.io
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

6 files changed, 176 insertions, 32 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 9d0514cfeb5c..626b9113e7c4 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -481,6 +481,20 @@ int ionic_dev_cmd_vf_getattr(struct ionic *ionic, int vf, u8 attr,
 	return err;
 }
 
+void ionic_vf_start(struct ionic *ionic)
+{
+	union ionic_dev_cmd cmd = {
+		.vf_ctrl.opcode = IONIC_CMD_VF_CTRL,
+		.vf_ctrl.ctrl_opcode = IONIC_VF_CTRL_START_ALL,
+	};
+
+	if (!(ionic->ident.dev.capabilities & cpu_to_le64(IONIC_DEV_CAP_VF_CTRL)))
+		return;
+
+	ionic_dev_cmd_go(&ionic->idev, &cmd);
+	ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
+}
+
 /* LIF commands */
 void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
 				  u16 lif_type, u8 qtype, u8 qver)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 563c302eb033..2a1d7b9c07e7 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -124,6 +124,8 @@ static_assert(sizeof(struct ionic_vf_setattr_cmd) == 64);
 static_assert(sizeof(struct ionic_vf_setattr_comp) == 16);
 static_assert(sizeof(struct ionic_vf_getattr_cmd) == 64);
 static_assert(sizeof(struct ionic_vf_getattr_comp) == 16);
+static_assert(sizeof(struct ionic_vf_ctrl_cmd) == 64);
+static_assert(sizeof(struct ionic_vf_ctrl_comp) == 16);
 #endif /* __CHECKER__ */
 
 struct ionic_devinfo {
@@ -324,6 +326,7 @@ int ionic_dev_cmd_vf_getattr(struct ionic *ionic, int vf, u8 attr,
 			     struct ionic_vf_getattr_comp *comp);
 void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
 				  u16 lif_type, u8 qtype, u8 qver);
+void ionic_vf_start(struct ionic *ionic);
 void ionic_dev_cmd_lif_identify(struct ionic_dev *idev, u8 type, u8 ver);
 void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index,
 			    dma_addr_t addr);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_if.h b/drivers/net/ethernet/pensando/ionic/ionic_if.h
index 4a90f611c611..eac09b2375b8 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_if.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_if.h
@@ -8,7 +8,7 @@
 #define IONIC_DEV_INFO_VERSION			1
 #define IONIC_IFNAMSIZ				16
 
-/**
+/*
  * enum ionic_cmd_opcode - Device commands
  */
 enum ionic_cmd_opcode {
@@ -54,6 +54,7 @@ enum ionic_cmd_opcode {
 	/* SR/IOV commands */
 	IONIC_CMD_VF_GETATTR			= 60,
 	IONIC_CMD_VF_SETATTR			= 61,
+	IONIC_CMD_VF_CTRL			= 62,
 
 	/* QoS commands */
 	IONIC_CMD_QOS_CLASS_IDENTIFY		= 240,
@@ -200,6 +201,7 @@ struct ionic_dev_reset_comp {
 };
 
 #define IONIC_IDENTITY_VERSION_1	1
+#define IONIC_DEV_IDENTITY_VERSION_2	2
 
 /**
  * struct ionic_dev_identify_cmd - Driver/device identify command
@@ -254,6 +256,14 @@ union ionic_drv_identity {
 };
 
 /**
+ * enum ionic_dev_capability - Device capabilities
+ * @IONIC_DEV_CAP_VF_CTRL:     Device supports VF ctrl operations
+ */
+enum ionic_dev_capability {
+	IONIC_DEV_CAP_VF_CTRL        = BIT(0),
+};
+
+/**
  * union ionic_dev_identity - device identity information
  * @version:          Version of device identify
  * @type:             Identify type (0 for now)
@@ -273,6 +283,7 @@ union ionic_drv_identity {
  * @hwstamp_mask:     Bitmask for subtraction of hardware tick values.
  * @hwstamp_mult:     Hardware tick to nanosecond multiplier.
  * @hwstamp_shift:    Hardware tick to nanosecond divisor (power of two).
+ * @capabilities:     Device capabilities
  */
 union ionic_dev_identity {
 	struct {
@@ -290,6 +301,7 @@ union ionic_dev_identity {
 		__le64 hwstamp_mask;
 		__le32 hwstamp_mult;
 		__le32 hwstamp_shift;
+		__le64 capabilities;
 	};
 	__le32 words[478];
 };
@@ -2044,6 +2056,35 @@ struct ionic_vf_getattr_comp {
 	u8     color;
 };
 
+enum ionic_vf_ctrl_opcode {
+	IONIC_VF_CTRL_START_ALL	= 0,
+	IONIC_VF_CTRL_START	= 1,
+};
+
+/**
+ * struct ionic_vf_ctrl_cmd - VF control command
+ * @opcode:         Opcode for the command
+ * @vf_index:       VF Index. It is unused if op START_ALL is used.
+ * @ctrl_opcode:    VF control operation type
+ */
+struct ionic_vf_ctrl_cmd {
+	u8	opcode;
+	u8	ctrl_opcode;
+	__le16	vf_index;
+	/* private: */
+	u8	rsvd1[60];
+};
+
+/**
+ * struct ionic_vf_ctrl_comp - VF_CTRL command completion.
+ * @status:     Status of the command (enum ionic_status_code)
+ */
+struct ionic_vf_ctrl_comp {
+	u8	status;
+	/* private: */
+	u8      rsvd[15];
+};
+
 /**
  * struct ionic_qos_identify_cmd - QoS identify command
  * @opcode:  opcode
@@ -2865,6 +2906,7 @@ union ionic_dev_cmd {
 
 	struct ionic_vf_setattr_cmd vf_setattr;
 	struct ionic_vf_getattr_cmd vf_getattr;
+	struct ionic_vf_ctrl_cmd vf_ctrl;
 
 	struct ionic_lif_identify_cmd lif_identify;
 	struct ionic_lif_init_cmd lif_init;
@@ -2903,6 +2945,7 @@ union ionic_dev_cmd_comp {
 
 	struct ionic_vf_setattr_comp vf_setattr;
 	struct ionic_vf_getattr_comp vf_getattr;
+	struct ionic_vf_ctrl_comp vf_ctrl;
 
 	struct ionic_lif_identify_comp lif_identify;
 	struct ionic_lif_init_comp lif_init;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 19d4848df17d..4dd16c487f2b 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1491,7 +1491,13 @@ static int ionic_init_nic_features(struct ionic_lif *lif)
 		   NETIF_F_RXCSUM |
 		   NETIF_F_TSO |
 		   NETIF_F_TSO6 |
-		   NETIF_F_TSO_ECN;
+		   NETIF_F_TSO_ECN |
+		   NETIF_F_GSO_GRE |
+		   NETIF_F_GSO_GRE_CSUM |
+		   NETIF_F_GSO_IPXIP4 |
+		   NETIF_F_GSO_IPXIP6 |
+		   NETIF_F_GSO_UDP_TUNNEL |
+		   NETIF_F_GSO_UDP_TUNNEL_CSUM;
 
 	if (lif->nxqs > 1)
 		features |= NETIF_F_RXHASH;
@@ -2220,7 +2226,7 @@ static int ionic_eth_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd
 	}
 }
 
-static int ionic_update_cached_vf_config(struct ionic *ionic, int vf)
+static int ionic_get_fw_vf_config(struct ionic *ionic, int vf, struct ionic_vf *vfdata)
 {
 	struct ionic_vf_getattr_comp comp = { 0 };
 	int err;
@@ -2231,14 +2237,14 @@ static int ionic_update_cached_vf_config(struct ionic *ionic, int vf)
 	if (err && comp.status != IONIC_RC_ENOSUPP)
 		goto err_out;
 	if (!err)
-		ionic->vfs[vf].vlanid = comp.vlanid;
+		vfdata->vlanid = comp.vlanid;
 
 	attr = IONIC_VF_ATTR_SPOOFCHK;
 	err = ionic_dev_cmd_vf_getattr(ionic, vf, attr, &comp);
 	if (err && comp.status != IONIC_RC_ENOSUPP)
 		goto err_out;
 	if (!err)
-		ionic->vfs[vf].spoofchk = comp.spoofchk;
+		vfdata->spoofchk = comp.spoofchk;
 
 	attr = IONIC_VF_ATTR_LINKSTATE;
 	err = ionic_dev_cmd_vf_getattr(ionic, vf, attr, &comp);
@@ -2247,13 +2253,13 @@ static int ionic_update_cached_vf_config(struct ionic *ionic, int vf)
 	if (!err) {
 		switch (comp.linkstate) {
 		case IONIC_VF_LINK_STATUS_UP:
-			ionic->vfs[vf].linkstate = IFLA_VF_LINK_STATE_ENABLE;
+			vfdata->linkstate = IFLA_VF_LINK_STATE_ENABLE;
 			break;
 		case IONIC_VF_LINK_STATUS_DOWN:
-			ionic->vfs[vf].linkstate = IFLA_VF_LINK_STATE_DISABLE;
+			vfdata->linkstate = IFLA_VF_LINK_STATE_DISABLE;
 			break;
 		case IONIC_VF_LINK_STATUS_AUTO:
-			ionic->vfs[vf].linkstate = IFLA_VF_LINK_STATE_AUTO;
+			vfdata->linkstate = IFLA_VF_LINK_STATE_AUTO;
 			break;
 		default:
 			dev_warn(ionic->dev, "Unexpected link state %u\n", comp.linkstate);
@@ -2266,21 +2272,21 @@ static int ionic_update_cached_vf_config(struct ionic *ionic, int vf)
 	if (err && comp.status != IONIC_RC_ENOSUPP)
 		goto err_out;
 	if (!err)
-		ionic->vfs[vf].maxrate = comp.maxrate;
+		vfdata->maxrate = comp.maxrate;
 
 	attr = IONIC_VF_ATTR_TRUST;
 	err = ionic_dev_cmd_vf_getattr(ionic, vf, attr, &comp);
 	if (err && comp.status != IONIC_RC_ENOSUPP)
 		goto err_out;
 	if (!err)
-		ionic->vfs[vf].trusted = comp.trust;
+		vfdata->trusted = comp.trust;
 
 	attr = IONIC_VF_ATTR_MAC;
 	err = ionic_dev_cmd_vf_getattr(ionic, vf, attr, &comp);
 	if (err && comp.status != IONIC_RC_ENOSUPP)
 		goto err_out;
 	if (!err)
-		ether_addr_copy(ionic->vfs[vf].macaddr, comp.macaddr);
+		ether_addr_copy(vfdata->macaddr, comp.macaddr);
 
 err_out:
 	if (err)
@@ -2295,6 +2301,7 @@ static int ionic_get_vf_config(struct net_device *netdev,
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
 	struct ionic *ionic = lif->ionic;
+	struct ionic_vf vfdata = { 0 };
 	int ret = 0;
 
 	if (!netif_device_present(netdev))
@@ -2308,14 +2315,14 @@ static int ionic_get_vf_config(struct net_device *netdev,
 		ivf->vf = vf;
 		ivf->qos = 0;
 
-		ret = ionic_update_cached_vf_config(ionic, vf);
+		ret = ionic_get_fw_vf_config(ionic, vf, &vfdata);
 		if (!ret) {
-			ivf->vlan         = le16_to_cpu(ionic->vfs[vf].vlanid);
-			ivf->spoofchk     = ionic->vfs[vf].spoofchk;
-			ivf->linkstate    = ionic->vfs[vf].linkstate;
-			ivf->max_tx_rate  = le32_to_cpu(ionic->vfs[vf].maxrate);
-			ivf->trusted      = ionic->vfs[vf].trusted;
-			ether_addr_copy(ivf->mac, ionic->vfs[vf].macaddr);
+			ivf->vlan         = le16_to_cpu(vfdata.vlanid);
+			ivf->spoofchk     = vfdata.spoofchk;
+			ivf->linkstate    = vfdata.linkstate;
+			ivf->max_tx_rate  = le32_to_cpu(vfdata.maxrate);
+			ivf->trusted      = vfdata.trusted;
+			ether_addr_copy(ivf->mac, vfdata.macaddr);
 		}
 	}
 
@@ -2562,6 +2569,76 @@ static int ionic_set_vf_link_state(struct net_device *netdev, int vf, int set)
 	return ret;
 }
 
+static void ionic_vf_attr_replay(struct ionic_lif *lif)
+{
+	struct ionic_vf_setattr_cmd vfc = { };
+	struct ionic *ionic = lif->ionic;
+	struct ionic_vf *v;
+	int i;
+
+	if (!ionic->vfs)
+		return;
+
+	down_read(&ionic->vf_op_lock);
+
+	for (i = 0; i < ionic->num_vfs; i++) {
+		v = &ionic->vfs[i];
+
+		if (v->stats_pa) {
+			vfc.attr = IONIC_VF_ATTR_STATSADDR;
+			vfc.stats_pa = cpu_to_le64(v->stats_pa);
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.stats_pa = 0;
+		}
+
+		if (!is_zero_ether_addr(v->macaddr)) {
+			vfc.attr = IONIC_VF_ATTR_MAC;
+			ether_addr_copy(vfc.macaddr, v->macaddr);
+			ionic_set_vf_config(ionic, i, &vfc);
+			eth_zero_addr(vfc.macaddr);
+		}
+
+		if (v->vlanid) {
+			vfc.attr = IONIC_VF_ATTR_VLAN;
+			vfc.vlanid = v->vlanid;
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.vlanid = 0;
+		}
+
+		if (v->maxrate) {
+			vfc.attr = IONIC_VF_ATTR_RATE;
+			vfc.maxrate = v->maxrate;
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.maxrate = 0;
+		}
+
+		if (v->spoofchk) {
+			vfc.attr = IONIC_VF_ATTR_SPOOFCHK;
+			vfc.spoofchk = v->spoofchk;
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.spoofchk = 0;
+		}
+
+		if (v->trusted) {
+			vfc.attr = IONIC_VF_ATTR_TRUST;
+			vfc.trust = v->trusted;
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.trust = 0;
+		}
+
+		if (v->linkstate) {
+			vfc.attr = IONIC_VF_ATTR_LINKSTATE;
+			vfc.linkstate = v->linkstate;
+			ionic_set_vf_config(ionic, i, &vfc);
+			vfc.linkstate = 0;
+		}
+	}
+
+	up_read(&ionic->vf_op_lock);
+
+	ionic_vf_start(ionic);
+}
+
 static const struct net_device_ops ionic_netdev_ops = {
 	.ndo_open               = ionic_open,
 	.ndo_stop               = ionic_stop,
@@ -3042,6 +3119,8 @@ static void ionic_lif_handle_fw_up(struct ionic_lif *lif)
 	if (err)
 		goto err_qcqs_free;
 
+	ionic_vf_attr_replay(lif);
+
 	if (lif->registered)
 		ionic_lif_set_netdev_info(lif);
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 56f93b030551..ed9d8c995236 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -533,7 +533,7 @@ int ionic_identify(struct ionic *ionic)
 	sz = min(sizeof(ident->drv), sizeof(idev->dev_cmd_regs->data));
 	memcpy_toio(&idev->dev_cmd_regs->data, &ident->drv, sz);
 
-	ionic_dev_cmd_identify(idev, IONIC_IDENTITY_VERSION_1);
+	ionic_dev_cmd_identify(idev, IONIC_DEV_IDENTITY_VERSION_2);
 	err = ionic_dev_cmd_wait(ionic, DEVCMD_TIMEOUT);
 	if (!err) {
 		sz = min(sizeof(ident->dev), sizeof(idev->dev_cmd_regs->data));
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index c03986bf2628..0c3977416cd1 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -348,16 +348,25 @@ void ionic_rx_fill(struct ionic_queue *q)
 	struct ionic_rxq_sg_desc *sg_desc;
 	struct ionic_rxq_sg_elem *sg_elem;
 	struct ionic_buf_info *buf_info;
+	unsigned int fill_threshold;
 	struct ionic_rxq_desc *desc;
 	unsigned int remain_len;
 	unsigned int frag_len;
 	unsigned int nfrags;
+	unsigned int n_fill;
 	unsigned int i, j;
 	unsigned int len;
 
+	n_fill = ionic_q_space_avail(q);
+
+	fill_threshold = min_t(unsigned int, IONIC_RX_FILL_THRESHOLD,
+			       q->num_descs / IONIC_RX_FILL_DIV);
+	if (n_fill < fill_threshold)
+		return;
+
 	len = netdev->mtu + ETH_HLEN + VLAN_HLEN;
 
-	for (i = ionic_q_space_avail(q); i; i--) {
+	for (i = n_fill; i; i--) {
 		nfrags = 0;
 		remain_len = len;
 		desc_info = &q->info[q->head_idx];
@@ -511,7 +520,6 @@ int ionic_rx_napi(struct napi_struct *napi, int budget)
 	struct ionic_cq *cq = napi_to_cq(napi);
 	struct ionic_dev *idev;
 	struct ionic_lif *lif;
-	u16 rx_fill_threshold;
 	u32 work_done = 0;
 	u32 flags = 0;
 
@@ -521,10 +529,7 @@ int ionic_rx_napi(struct napi_struct *napi, int budget)
 	work_done = ionic_cq_service(cq, budget,
 				     ionic_rx_service, NULL, NULL);
 
-	rx_fill_threshold = min_t(u16, IONIC_RX_FILL_THRESHOLD,
-				  cq->num_descs / IONIC_RX_FILL_DIV);
-	if (work_done && ionic_q_space_avail(cq->bound_q) >= rx_fill_threshold)
-		ionic_rx_fill(cq->bound_q);
+	ionic_rx_fill(cq->bound_q);
 
 	if (work_done < budget && napi_complete_done(napi, work_done)) {
 		ionic_dim_update(qcq, IONIC_LIF_F_RX_DIM_INTR);
@@ -550,7 +555,6 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 	struct ionic_dev *idev;
 	struct ionic_lif *lif;
 	struct ionic_cq *txcq;
-	u16 rx_fill_threshold;
 	u32 rx_work_done = 0;
 	u32 tx_work_done = 0;
 	u32 flags = 0;
@@ -565,10 +569,7 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 	rx_work_done = ionic_cq_service(rxcq, budget,
 					ionic_rx_service, NULL, NULL);
 
-	rx_fill_threshold = min_t(u16, IONIC_RX_FILL_THRESHOLD,
-				  rxcq->num_descs / IONIC_RX_FILL_DIV);
-	if (rx_work_done && ionic_q_space_avail(rxcq->bound_q) >= rx_fill_threshold)
-		ionic_rx_fill(rxcq->bound_q);
+	ionic_rx_fill(rxcq->bound_q);
 
 	if (rx_work_done < budget && napi_complete_done(napi, rx_work_done)) {
 		ionic_dim_update(qcq, 0);
@@ -925,8 +926,12 @@ static int ionic_tx_tso(struct ionic_queue *q, struct sk_buff *skb)
 
 	len = skb->len;
 	mss = skb_shinfo(skb)->gso_size;
-	outer_csum = (skb_shinfo(skb)->gso_type & SKB_GSO_GRE_CSUM) ||
-		     (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM);
+	outer_csum = (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
+						   SKB_GSO_GRE_CSUM |
+						   SKB_GSO_IPXIP4 |
+						   SKB_GSO_IPXIP6 |
+						   SKB_GSO_UDP_TUNNEL |
+						   SKB_GSO_UDP_TUNNEL_CSUM));
 	has_vlan = !!skb_vlan_tag_present(skb);
 	vlan_tci = skb_vlan_tag_get(skb);
 	encap = skb->encapsulation;