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* [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support
@ 2022-06-14 20:28 Haiyang Zhang
  2022-06-14 20:28 ` [PATCH net-next,v2,1/2] net: mana: Add the Linux MANA PF driver Haiyang Zhang
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Haiyang Zhang @ 2022-06-14 20:28 UTC (permalink / raw)
  To: linux-hyperv, netdev
  Cc: haiyangz, decui, kys, sthemmin, paulros, shacharr, olaf,
	vkuznets, davem, linux-kernel

The patch set adds PF and XDP_REDIRECT support.

Dexuan Cui (1):
  net: mana: Add the Linux MANA PF driver

Haiyang Zhang (1):
  net: mana: Add support of XDP_REDIRECT action

 drivers/net/ethernet/microsoft/mana/gdma.h    |  10 ++
 .../net/ethernet/microsoft/mana/gdma_main.c   |  39 ++++-
 .../net/ethernet/microsoft/mana/hw_channel.c  |  18 ++-
 .../net/ethernet/microsoft/mana/hw_channel.h  |   5 +
 drivers/net/ethernet/microsoft/mana/mana.h    |  70 +++++++++
 .../net/ethernet/microsoft/mana/mana_bpf.c    |  64 ++++++++
 drivers/net/ethernet/microsoft/mana/mana_en.c | 148 +++++++++++++++++-
 .../ethernet/microsoft/mana/mana_ethtool.c    |  12 +-
 8 files changed, 360 insertions(+), 6 deletions(-)

-- 
2.25.1


^ permalink raw reply	[flat|nested] 4+ messages in thread
* [PATCH net-next,v2,1/2] net: mana: Add the Linux MANA PF driver
  2022-06-14 20:28 [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support Haiyang Zhang
@ 2022-06-14 20:28 ` Haiyang Zhang
  2022-06-14 20:28 ` [PATCH net-next,v2,2/2] net: mana: Add support of XDP_REDIRECT action Haiyang Zhang
  2022-06-16  9:10 ` [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support patchwork-bot+netdevbpf
  2 siblings, 0 replies; 4+ messages in thread
From: Haiyang Zhang @ 2022-06-14 20:28 UTC (permalink / raw)
  To: linux-hyperv, netdev
  Cc: haiyangz, decui, kys, sthemmin, paulros, shacharr, olaf,
	vkuznets, davem, linux-kernel

From: Dexuan Cui <decui@microsoft.com>

This minimal PF driver runs on bare metal.
Currently Ethernet TX/RX works. SR-IOV management is not supported yet.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Co-developed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/net/ethernet/microsoft/mana/gdma.h    |  10 ++
 .../net/ethernet/microsoft/mana/gdma_main.c   |  39 ++++-
 .../net/ethernet/microsoft/mana/hw_channel.c  |  18 ++-
 .../net/ethernet/microsoft/mana/hw_channel.h  |   5 +
 drivers/net/ethernet/microsoft/mana/mana.h    |  64 +++++++++
 drivers/net/ethernet/microsoft/mana/mana_en.c | 135 ++++++++++++++++++
 6 files changed, 267 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma.h b/drivers/net/ethernet/microsoft/mana/gdma.h
index 41ecd156e95f..4a6efe6ada08 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma.h
+++ b/drivers/net/ethernet/microsoft/mana/gdma.h
@@ -348,6 +348,7 @@ struct gdma_context {
 	struct completion	eq_test_event;
 	u32			test_event_eq_id;
 
+	bool			is_pf;
 	void __iomem		*bar0_va;
 	void __iomem		*shm_base;
 	void __iomem		*db_page_base;
@@ -469,6 +470,15 @@ struct gdma_eqe {
 #define GDMA_REG_DB_PAGE_SIZE	0x10
 #define GDMA_REG_SHM_OFFSET	0x18
 
+#define GDMA_PF_REG_DB_PAGE_SIZE	0xD0
+#define GDMA_PF_REG_DB_PAGE_OFF		0xC8
+#define GDMA_PF_REG_SHM_OFF		0x70
+
+#define GDMA_SRIOV_REG_CFG_BASE_OFF	0x108
+
+#define MANA_PF_DEVICE_ID 0x00B9
+#define MANA_VF_DEVICE_ID 0x00BA
+
 struct gdma_posted_wqe_info {
 	u32 wqe_size_in_bu;
 };
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 49b85ca578b0..5f9240182351 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -18,7 +18,24 @@ static u64 mana_gd_r64(struct gdma_context *g, u64 offset)
 	return readq(g->bar0_va + offset);
 }
 
-static void mana_gd_init_registers(struct pci_dev *pdev)
+static void mana_gd_init_pf_regs(struct pci_dev *pdev)
+{
+	struct gdma_context *gc = pci_get_drvdata(pdev);
+	void __iomem *sriov_base_va;
+	u64 sriov_base_off;
+
+	gc->db_page_size = mana_gd_r32(gc, GDMA_PF_REG_DB_PAGE_SIZE) & 0xFFFF;
+	gc->db_page_base = gc->bar0_va +
+				mana_gd_r64(gc, GDMA_PF_REG_DB_PAGE_OFF);
+
+	sriov_base_off = mana_gd_r64(gc, GDMA_SRIOV_REG_CFG_BASE_OFF);
+
+	sriov_base_va = gc->bar0_va + sriov_base_off;
+	gc->shm_base = sriov_base_va +
+			mana_gd_r64(gc, sriov_base_off + GDMA_PF_REG_SHM_OFF);
+}
+
+static void mana_gd_init_vf_regs(struct pci_dev *pdev)
 {
 	struct gdma_context *gc = pci_get_drvdata(pdev);
 
@@ -30,6 +47,16 @@ static void mana_gd_init_registers(struct pci_dev *pdev)
 	gc->shm_base = gc->bar0_va + mana_gd_r64(gc, GDMA_REG_SHM_OFFSET);
 }
 
+static void mana_gd_init_registers(struct pci_dev *pdev)
+{
+	struct gdma_context *gc = pci_get_drvdata(pdev);
+
+	if (gc->is_pf)
+		mana_gd_init_pf_regs(pdev);
+	else
+		mana_gd_init_vf_regs(pdev);
+}
+
 static int mana_gd_query_max_resources(struct pci_dev *pdev)
 {
 	struct gdma_context *gc = pci_get_drvdata(pdev);
@@ -1304,6 +1331,11 @@ static void mana_gd_cleanup(struct pci_dev *pdev)
 	mana_gd_remove_irqs(pdev);
 }
 
+static bool mana_is_pf(unsigned short dev_id)
+{
+	return dev_id == MANA_PF_DEVICE_ID;
+}
+
 static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	struct gdma_context *gc;
@@ -1340,10 +1372,10 @@ static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (!bar0_va)
 		goto free_gc;
 
+	gc->is_pf = mana_is_pf(pdev->device);
 	gc->bar0_va = bar0_va;
 	gc->dev = &pdev->dev;
 
-
 	err = mana_gd_setup(pdev);
 	if (err)
 		goto unmap_bar;
@@ -1438,7 +1470,8 @@ static void mana_gd_shutdown(struct pci_dev *pdev)
 #endif
 
 static const struct pci_device_id mana_id_table[] = {
-	{ PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, 0x00BA) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF_DEVICE_ID) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_VF_DEVICE_ID) },
 	{ }
 };
 
diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.c b/drivers/net/ethernet/microsoft/mana/hw_channel.c
index 078d6a5a0768..543a5d5c304f 100644
--- a/drivers/net/ethernet/microsoft/mana/hw_channel.c
+++ b/drivers/net/ethernet/microsoft/mana/hw_channel.c
@@ -158,6 +158,14 @@ static void mana_hwc_init_event_handler(void *ctx, struct gdma_queue *q_self,
 			hwc->rxq->msg_buf->gpa_mkey = val;
 			hwc->txq->msg_buf->gpa_mkey = val;
 			break;
+
+		case HWC_INIT_DATA_PF_DEST_RQ_ID:
+			hwc->pf_dest_vrq_id = val;
+			break;
+
+		case HWC_INIT_DATA_PF_DEST_CQ_ID:
+			hwc->pf_dest_vrcq_id = val;
+			break;
 		}
 
 		break;
@@ -773,10 +781,13 @@ void mana_hwc_destroy_channel(struct gdma_context *gc)
 int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
 			  const void *req, u32 resp_len, void *resp)
 {
+	struct gdma_context *gc = hwc->gdma_dev->gdma_context;
 	struct hwc_work_request *tx_wr;
 	struct hwc_wq *txq = hwc->txq;
 	struct gdma_req_hdr *req_msg;
 	struct hwc_caller_ctx *ctx;
+	u32 dest_vrcq = 0;
+	u32 dest_vrq = 0;
 	u16 msg_id;
 	int err;
 
@@ -803,7 +814,12 @@ int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len,
 
 	tx_wr->msg_size = req_len;
 
-	err = mana_hwc_post_tx_wqe(txq, tx_wr, 0, 0, false);
+	if (gc->is_pf) {
+		dest_vrq = hwc->pf_dest_vrq_id;
+		dest_vrcq = hwc->pf_dest_vrcq_id;
+	}
+
+	err = mana_hwc_post_tx_wqe(txq, tx_wr, dest_vrq, dest_vrcq, false);
 	if (err) {
 		dev_err(hwc->dev, "HWC: Failed to post send WQE: %d\n", err);
 		goto out;
diff --git a/drivers/net/ethernet/microsoft/mana/hw_channel.h b/drivers/net/ethernet/microsoft/mana/hw_channel.h
index 31c6e83c454a..6a757a6e2732 100644
--- a/drivers/net/ethernet/microsoft/mana/hw_channel.h
+++ b/drivers/net/ethernet/microsoft/mana/hw_channel.h
@@ -20,6 +20,8 @@
 #define HWC_INIT_DATA_MAX_NUM_CQS	7
 #define HWC_INIT_DATA_PDID		8
 #define HWC_INIT_DATA_GPA_MKEY		9
+#define HWC_INIT_DATA_PF_DEST_RQ_ID	10
+#define HWC_INIT_DATA_PF_DEST_CQ_ID	11
 
 /* Structures labeled with "HW DATA" are exchanged with the hardware. All of
  * them are naturally aligned and hence don't need __packed.
@@ -178,6 +180,9 @@ struct hw_channel_context {
 	struct semaphore sema;
 	struct gdma_resource inflight_msg_res;
 
+	u32 pf_dest_vrq_id;
+	u32 pf_dest_vrcq_id;
+
 	struct hwc_caller_ctx *caller_ctx;
 };
 
diff --git a/drivers/net/ethernet/microsoft/mana/mana.h b/drivers/net/ethernet/microsoft/mana/mana.h
index d36405af9432..f198b34c232f 100644
--- a/drivers/net/ethernet/microsoft/mana/mana.h
+++ b/drivers/net/ethernet/microsoft/mana/mana.h
@@ -374,6 +374,7 @@ struct mana_port_context {
 	unsigned int num_queues;
 
 	mana_handle_t port_handle;
+	mana_handle_t pf_filter_handle;
 
 	u16 port_idx;
 
@@ -420,6 +421,12 @@ enum mana_command_code {
 	MANA_FENCE_RQ		= 0x20006,
 	MANA_CONFIG_VPORT_RX	= 0x20007,
 	MANA_QUERY_VPORT_CONFIG	= 0x20008,
+
+	/* Privileged commands for the PF mode */
+	MANA_REGISTER_FILTER	= 0x28000,
+	MANA_DEREGISTER_FILTER	= 0x28001,
+	MANA_REGISTER_HW_PORT	= 0x28003,
+	MANA_DEREGISTER_HW_PORT	= 0x28004,
 };
 
 /* Query Device Configuration */
@@ -547,6 +554,63 @@ struct mana_cfg_rx_steer_resp {
 	struct gdma_resp_hdr hdr;
 }; /* HW DATA */
 
+/* Register HW vPort */
+struct mana_register_hw_vport_req {
+	struct gdma_req_hdr hdr;
+	u16 attached_gfid;
+	u8 is_pf_default_vport;
+	u8 reserved1;
+	u8 allow_all_ether_types;
+	u8 reserved2;
+	u8 reserved3;
+	u8 reserved4;
+}; /* HW DATA */
+
+struct mana_register_hw_vport_resp {
+	struct gdma_resp_hdr hdr;
+	mana_handle_t hw_vport_handle;
+}; /* HW DATA */
+
+/* Deregister HW vPort */
+struct mana_deregister_hw_vport_req {
+	struct gdma_req_hdr hdr;
+	mana_handle_t hw_vport_handle;
+}; /* HW DATA */
+
+struct mana_deregister_hw_vport_resp {
+	struct gdma_resp_hdr hdr;
+}; /* HW DATA */
+
+/* Register filter */
+struct mana_register_filter_req {
+	struct gdma_req_hdr hdr;
+	mana_handle_t vport;
+	u8 mac_addr[6];
+	u8 reserved1;
+	u8 reserved2;
+	u8 reserved3;
+	u8 reserved4;
+	u16 reserved5;
+	u32 reserved6;
+	u32 reserved7;
+	u32 reserved8;
+}; /* HW DATA */
+
+struct mana_register_filter_resp {
+	struct gdma_resp_hdr hdr;
+	mana_handle_t filter_handle;
+}; /* HW DATA */
+
+/* Deregister filter */
+struct mana_deregister_filter_req {
+	struct gdma_req_hdr hdr;
+	mana_handle_t filter_handle;
+}; /* HW DATA */
+
+struct mana_deregister_filter_resp {
+	struct gdma_resp_hdr hdr;
+}; /* HW DATA */
+
 #define MANA_MAX_NUM_QUEUES 64
 
 #define MANA_SHORT_VPORT_OFFSET_MAX ((1U << 8) - 1)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index b1d773823232..3ef09e0cdbaa 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -446,6 +446,119 @@ static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr,
 	return 0;
 }
 
+static int mana_pf_register_hw_vport(struct mana_port_context *apc)
+{
+	struct mana_register_hw_vport_resp resp = {};
+	struct mana_register_hw_vport_req req = {};
+	int err;
+
+	mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT,
+			     sizeof(req), sizeof(resp));
+	req.attached_gfid = 1;
+	req.is_pf_default_vport = 1;
+	req.allow_all_ether_types = 1;
+
+	err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
+				sizeof(resp));
+	if (err) {
+		netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err);
+		return err;
+	}
+
+	err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT,
+				   sizeof(resp));
+	if (err || resp.hdr.status) {
+		netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n",
+			   err, resp.hdr.status);
+		return err ? err : -EPROTO;
+	}
+
+	apc->port_handle = resp.hw_vport_handle;
+	return 0;
+}
+
+static void mana_pf_deregister_hw_vport(struct mana_port_context *apc)
+{
+	struct mana_deregister_hw_vport_resp resp = {};
+	struct mana_deregister_hw_vport_req req = {};
+	int err;
+
+	mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT,
+			     sizeof(req), sizeof(resp));
+	req.hw_vport_handle = apc->port_handle;
+
+	err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
+				sizeof(resp));
+	if (err) {
+		netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n",
+			   err);
+		return;
+	}
+
+	err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT,
+				   sizeof(resp));
+	if (err || resp.hdr.status)
+		netdev_err(apc->ndev,
+			   "Failed to deregister hw vPort: %d, 0x%x\n",
+			   err, resp.hdr.status);
+}
+
+static int mana_pf_register_filter(struct mana_port_context *apc)
+{
+	struct mana_register_filter_resp resp = {};
+	struct mana_register_filter_req req = {};
+	int err;
+
+	mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER,
+			     sizeof(req), sizeof(resp));
+	req.vport = apc->port_handle;
+	memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN);
+
+	err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
+				sizeof(resp));
+	if (err) {
+		netdev_err(apc->ndev, "Failed to register filter: %d\n", err);
+		return err;
+	}
+
+	err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER,
+				   sizeof(resp));
+	if (err || resp.hdr.status) {
+		netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n",
+			   err, resp.hdr.status);
+		return err ? err : -EPROTO;
+	}
+
+	apc->pf_filter_handle = resp.filter_handle;
+	return 0;
+}
+
+static void mana_pf_deregister_filter(struct mana_port_context *apc)
+{
+	struct mana_deregister_filter_resp resp = {};
+	struct mana_deregister_filter_req req = {};
+	int err;
+
+	mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER,
+			     sizeof(req), sizeof(resp));
+	req.filter_handle = apc->pf_filter_handle;
+
+	err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
+				sizeof(resp));
+	if (err) {
+		netdev_err(apc->ndev, "Failed to unregister filter: %d\n",
+			   err);
+		return;
+	}
+
+	err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER,
+				   sizeof(resp));
+	if (err || resp.hdr.status)
+		netdev_err(apc->ndev,
+			   "Failed to deregister filter: %d, 0x%x\n",
+			   err, resp.hdr.status);
+}
+
 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver,
 				 u32 proto_minor_ver, u32 proto_micro_ver,
 				 u16 *max_num_vports)
@@ -1653,6 +1766,7 @@ static int mana_add_rx_queues(struct mana_port_context *apc,
 
 static void mana_destroy_vport(struct mana_port_context *apc)
 {
+	struct gdma_dev *gd = apc->ac->gdma_dev;
 	struct mana_rxq *rxq;
 	u32 rxq_idx;
 
@@ -1666,6 +1780,9 @@ static void mana_destroy_vport(struct mana_port_context *apc)
 	}
 
 	mana_destroy_txq(apc);
+
+	if (gd->gdma_context->is_pf)
+		mana_pf_deregister_hw_vport(apc);
 }
 
 static int mana_create_vport(struct mana_port_context *apc,
@@ -1676,6 +1793,12 @@ static int mana_create_vport(struct mana_port_context *apc,
 
 	apc->default_rxobj = INVALID_MANA_HANDLE;
 
+	if (gd->gdma_context->is_pf) {
+		err = mana_pf_register_hw_vport(apc);
+		if (err)
+			return err;
+	}
+
 	err = mana_cfg_vport(apc, gd->pdid, gd->doorbell);
 	if (err)
 		return err;
@@ -1755,6 +1878,7 @@ static int mana_init_port(struct net_device *ndev)
 int mana_alloc_queues(struct net_device *ndev)
 {
 	struct mana_port_context *apc = netdev_priv(ndev);
+	struct gdma_dev *gd = apc->ac->gdma_dev;
 	int err;
 
 	err = mana_create_vport(apc, ndev);
@@ -1781,6 +1905,12 @@ int mana_alloc_queues(struct net_device *ndev)
 	if (err)
 		goto destroy_vport;
 
+	if (gd->gdma_context->is_pf) {
+		err = mana_pf_register_filter(apc);
+		if (err)
+			goto destroy_vport;
+	}
+
 	mana_chn_setxdp(apc, mana_xdp_get(apc));
 
 	return 0;
@@ -1825,6 +1955,7 @@ int mana_attach(struct net_device *ndev)
 static int mana_dealloc_queues(struct net_device *ndev)
 {
 	struct mana_port_context *apc = netdev_priv(ndev);
+	struct gdma_dev *gd = apc->ac->gdma_dev;
 	struct mana_txq *txq;
 	int i, err;
 
@@ -1833,6 +1964,9 @@ static int mana_dealloc_queues(struct net_device *ndev)
 
 	mana_chn_setxdp(apc, NULL);
 
+	if (gd->gdma_context->is_pf)
+		mana_pf_deregister_filter(apc);
+
 	/* No packet can be transmitted now since apc->port_is_up is false.
 	 * There is still a tiny chance that mana_poll_tx_cq() can re-enable
 	 * a txq because it may not timely see apc->port_is_up being cleared
@@ -1915,6 +2049,7 @@ static int mana_probe_port(struct mana_context *ac, int port_idx,
 	apc->max_queues = gc->max_num_queues;
 	apc->num_queues = gc->max_num_queues;
 	apc->port_handle = INVALID_MANA_HANDLE;
+	apc->pf_filter_handle = INVALID_MANA_HANDLE;
 	apc->port_idx = port_idx;
 
 	ndev->netdev_ops = &mana_devops;
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
* [PATCH net-next,v2,2/2] net: mana: Add support of XDP_REDIRECT action
  2022-06-14 20:28 [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support Haiyang Zhang
  2022-06-14 20:28 ` [PATCH net-next,v2,1/2] net: mana: Add the Linux MANA PF driver Haiyang Zhang
@ 2022-06-14 20:28 ` Haiyang Zhang
  2022-06-16  9:10 ` [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support patchwork-bot+netdevbpf
  2 siblings, 0 replies; 4+ messages in thread
From: Haiyang Zhang @ 2022-06-14 20:28 UTC (permalink / raw)
  To: linux-hyperv, netdev
  Cc: haiyangz, decui, kys, sthemmin, paulros, shacharr, olaf,
	vkuznets, davem, linux-kernel

Add a handler of the XDP_REDIRECT return code from a XDP program. The
packets will be flushed at the end of each RX/CQ NAPI poll cycle.
ndo_xdp_xmit() is implemented by sharing the code in mana_xdp_tx().
Ethtool per queue counters are added for XDP redirect and xmit operations.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/net/ethernet/microsoft/mana/mana.h    |  6 ++
 .../net/ethernet/microsoft/mana/mana_bpf.c    | 64 +++++++++++++++++++
 drivers/net/ethernet/microsoft/mana/mana_en.c | 13 +++-
 .../ethernet/microsoft/mana/mana_ethtool.c    | 12 +++-
 4 files changed, 93 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana.h b/drivers/net/ethernet/microsoft/mana/mana.h
index f198b34c232f..d58be64374c8 100644
--- a/drivers/net/ethernet/microsoft/mana/mana.h
+++ b/drivers/net/ethernet/microsoft/mana/mana.h
@@ -53,12 +53,14 @@ struct mana_stats_rx {
 	u64 bytes;
 	u64 xdp_drop;
 	u64 xdp_tx;
+	u64 xdp_redirect;
 	struct u64_stats_sync syncp;
 };
 
 struct mana_stats_tx {
 	u64 packets;
 	u64 bytes;
+	u64 xdp_xmit;
 	struct u64_stats_sync syncp;
 };
 
@@ -311,6 +313,8 @@ struct mana_rxq {
 	struct bpf_prog __rcu *bpf_prog;
 	struct xdp_rxq_info xdp_rxq;
 	struct page *xdp_save_page;
+	bool xdp_flush;
+	int xdp_rc; /* XDP redirect return code */
 
 	/* MUST BE THE LAST MEMBER:
 	 * Each receive buffer has an associated mana_recv_buf_oob.
@@ -396,6 +400,8 @@ int mana_probe(struct gdma_dev *gd, bool resuming);
 void mana_remove(struct gdma_dev *gd, bool suspending);
 
 void mana_xdp_tx(struct sk_buff *skb, struct net_device *ndev);
+int mana_xdp_xmit(struct net_device *ndev, int n, struct xdp_frame **frames,
+		  u32 flags);
 u32 mana_run_xdp(struct net_device *ndev, struct mana_rxq *rxq,
 		 struct xdp_buff *xdp, void *buf_va, uint pkt_len);
 struct bpf_prog *mana_xdp_get(struct mana_port_context *apc);
diff --git a/drivers/net/ethernet/microsoft/mana/mana_bpf.c b/drivers/net/ethernet/microsoft/mana/mana_bpf.c
index 1d2f948b5c00..421fd39ff3a8 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_bpf.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_bpf.c
@@ -32,9 +32,55 @@ void mana_xdp_tx(struct sk_buff *skb, struct net_device *ndev)
 	ndev->stats.tx_dropped++;
 }
 
+static int mana_xdp_xmit_fm(struct net_device *ndev, struct xdp_frame *frame,
+			    u16 q_idx)
+{
+	struct sk_buff *skb;
+
+	skb = xdp_build_skb_from_frame(frame, ndev);
+	if (unlikely(!skb))
+		return -ENOMEM;
+
+	skb_set_queue_mapping(skb, q_idx);
+
+	mana_xdp_tx(skb, ndev);
+
+	return 0;
+}
+
+int mana_xdp_xmit(struct net_device *ndev, int n, struct xdp_frame **frames,
+		  u32 flags)
+{
+	struct mana_port_context *apc = netdev_priv(ndev);
+	struct mana_stats_tx *tx_stats;
+	int i, count = 0;
+	u16 q_idx;
+
+	if (unlikely(!apc->port_is_up))
+		return 0;
+
+	q_idx = smp_processor_id() % ndev->real_num_tx_queues;
+
+	for (i = 0; i < n; i++) {
+		if (mana_xdp_xmit_fm(ndev, frames[i], q_idx))
+			break;
+
+		count++;
+	}
+
+	tx_stats = &apc->tx_qp[q_idx].txq.stats;
+
+	u64_stats_update_begin(&tx_stats->syncp);
+	tx_stats->xdp_xmit += count;
+	u64_stats_update_end(&tx_stats->syncp);
+
+	return count;
+}
+
 u32 mana_run_xdp(struct net_device *ndev, struct mana_rxq *rxq,
 		 struct xdp_buff *xdp, void *buf_va, uint pkt_len)
 {
+	struct mana_stats_rx *rx_stats;
 	struct bpf_prog *prog;
 	u32 act = XDP_PASS;
 
@@ -49,12 +95,30 @@ u32 mana_run_xdp(struct net_device *ndev, struct mana_rxq *rxq,
 
 	act = bpf_prog_run_xdp(prog, xdp);
 
+	rx_stats = &rxq->stats;
+
 	switch (act) {
 	case XDP_PASS:
 	case XDP_TX:
 	case XDP_DROP:
 		break;
 
+	case XDP_REDIRECT:
+		rxq->xdp_rc = xdp_do_redirect(ndev, xdp, prog);
+		if (!rxq->xdp_rc) {
+			rxq->xdp_flush = true;
+
+			u64_stats_update_begin(&rx_stats->syncp);
+			rx_stats->packets++;
+			rx_stats->bytes += pkt_len;
+			rx_stats->xdp_redirect++;
+			u64_stats_update_end(&rx_stats->syncp);
+
+			break;
+		}
+
+		fallthrough;
+
 	case XDP_ABORTED:
 		trace_xdp_exception(ndev, prog, act);
 		break;
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 3ef09e0cdbaa..9259a74eca40 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -6,6 +6,7 @@
 #include <linux/inetdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool.h>
+#include <linux/filter.h>
 #include <linux/mm.h>
 
 #include <net/checksum.h>
@@ -382,6 +383,7 @@ static const struct net_device_ops mana_devops = {
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_get_stats64	= mana_get_stats64,
 	.ndo_bpf		= mana_bpf,
+	.ndo_xdp_xmit		= mana_xdp_xmit,
 };
 
 static void mana_cleanup_port_context(struct mana_port_context *apc)
@@ -1120,6 +1122,9 @@ static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
 
 	act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len);
 
+	if (act == XDP_REDIRECT && !rxq->xdp_rc)
+		return;
+
 	if (act != XDP_PASS && act != XDP_TX)
 		goto drop_xdp;
 
@@ -1275,11 +1280,14 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
 static void mana_poll_rx_cq(struct mana_cq *cq)
 {
 	struct gdma_comp *comp = cq->gdma_comp_buf;
+	struct mana_rxq *rxq = cq->rxq;
 	int comp_read, i;
 
 	comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER);
 	WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER);
 
+	rxq->xdp_flush = false;
+
 	for (i = 0; i < comp_read; i++) {
 		if (WARN_ON_ONCE(comp[i].is_sq))
 			return;
@@ -1288,8 +1296,11 @@ static void mana_poll_rx_cq(struct mana_cq *cq)
 		if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id))
 			return;
 
-		mana_process_rx_cqe(cq->rxq, cq, &comp[i]);
+		mana_process_rx_cqe(rxq, cq, &comp[i]);
 	}
+
+	if (rxq->xdp_flush)
+		xdp_do_flush();
 }
 
 static void mana_cq_handler(void *context, struct gdma_queue *gdma_queue)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
index e13f2453eabb..c530db76880f 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
@@ -23,7 +23,7 @@ static int mana_get_sset_count(struct net_device *ndev, int stringset)
 	if (stringset != ETH_SS_STATS)
 		return -EINVAL;
 
-	return ARRAY_SIZE(mana_eth_stats) + num_queues * 6;
+	return ARRAY_SIZE(mana_eth_stats) + num_queues * 8;
 }
 
 static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
@@ -50,6 +50,8 @@ static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 		p += ETH_GSTRING_LEN;
 		sprintf(p, "rx_%d_xdp_tx", i);
 		p += ETH_GSTRING_LEN;
+		sprintf(p, "rx_%d_xdp_redirect", i);
+		p += ETH_GSTRING_LEN;
 	}
 
 	for (i = 0; i < num_queues; i++) {
@@ -57,6 +59,8 @@ static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 		p += ETH_GSTRING_LEN;
 		sprintf(p, "tx_%d_bytes", i);
 		p += ETH_GSTRING_LEN;
+		sprintf(p, "tx_%d_xdp_xmit", i);
+		p += ETH_GSTRING_LEN;
 	}
 }
 
@@ -70,6 +74,8 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 	struct mana_stats_tx *tx_stats;
 	unsigned int start;
 	u64 packets, bytes;
+	u64 xdp_redirect;
+	u64 xdp_xmit;
 	u64 xdp_drop;
 	u64 xdp_tx;
 	int q, i = 0;
@@ -89,12 +95,14 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 			bytes = rx_stats->bytes;
 			xdp_drop = rx_stats->xdp_drop;
 			xdp_tx = rx_stats->xdp_tx;
+			xdp_redirect = rx_stats->xdp_redirect;
 		} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
 
 		data[i++] = packets;
 		data[i++] = bytes;
 		data[i++] = xdp_drop;
 		data[i++] = xdp_tx;
+		data[i++] = xdp_redirect;
 	}
 
 	for (q = 0; q < num_queues; q++) {
@@ -104,10 +112,12 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
 			start = u64_stats_fetch_begin_irq(&tx_stats->syncp);
 			packets = tx_stats->packets;
 			bytes = tx_stats->bytes;
+			xdp_xmit = tx_stats->xdp_xmit;
 		} while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start));
 
 		data[i++] = packets;
 		data[i++] = bytes;
+		data[i++] = xdp_xmit;
 	}
 }
 
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 4+ messages in thread
* Re: [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support
  2022-06-14 20:28 [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support Haiyang Zhang
  2022-06-14 20:28 ` [PATCH net-next,v2,1/2] net: mana: Add the Linux MANA PF driver Haiyang Zhang
  2022-06-14 20:28 ` [PATCH net-next,v2,2/2] net: mana: Add support of XDP_REDIRECT action Haiyang Zhang
@ 2022-06-16  9:10 ` patchwork-bot+netdevbpf
  2 siblings, 0 replies; 4+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-06-16  9:10 UTC (permalink / raw)
  To: Haiyang Zhang
  Cc: linux-hyperv, netdev, decui, kys, sthemmin, paulros, shacharr,
	olaf, vkuznets, davem, linux-kernel

Hello:

This series was applied to netdev/net-next.git (master)
by Paolo Abeni <pabeni@redhat.com>:

On Tue, 14 Jun 2022 13:28:53 -0700 you wrote:
> The patch set adds PF and XDP_REDIRECT support.
> 
> Dexuan Cui (1):
>   net: mana: Add the Linux MANA PF driver
> 
> Haiyang Zhang (1):
>   net: mana: Add support of XDP_REDIRECT action
> 
> [...]

Here is the summary with links:
  - [net-next,v2,1/2] net: mana: Add the Linux MANA PF driver
    https://git.kernel.org/netdev/net-next/c/1566e7d6206f
  - [net-next,v2,2/2] net: mana: Add support of XDP_REDIRECT action
    https://git.kernel.org/netdev/net-next/c/7a8938cd024d

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html



^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-06-16  9:10 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-06-14 20:28 [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support Haiyang Zhang
2022-06-14 20:28 ` [PATCH net-next,v2,1/2] net: mana: Add the Linux MANA PF driver Haiyang Zhang
2022-06-14 20:28 ` [PATCH net-next,v2,2/2] net: mana: Add support of XDP_REDIRECT action Haiyang Zhang
2022-06-16  9:10 ` [PATCH net-next,v2,0/2] net: mana: Add PF and XDP_REDIRECT support patchwork-bot+netdevbpf

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