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Message-Id: <1578656521-14189-12-git-send-email-sunil.kovvuri@gmail.com>
Date: Fri, 10 Jan 2020 17:11:55 +0530
From: sunil.kovvuri@...il.com
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, Sunil Goutham <sgoutham@...vell.com>
Subject: [PATCH 11/17] octeontx2-pf: Receive side scaling support
From: Sunil Goutham <sgoutham@...vell.com>
Adds receive side scaling (RSS) support to distribute
pkts/flows across multiple queues. Sets up key, indirection
table etc. Also added extraction of HW calculated rxhash and
adding to same to SKB ie NETIF_F_RXHASH offload support.
Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
---
.../ethernet/marvell/octeontx2/nic/otx2_common.c | 115 +++++++++++++++++++++
.../ethernet/marvell/octeontx2/nic/otx2_common.h | 14 +++
.../net/ethernet/marvell/octeontx2/nic/otx2_pf.c | 8 +-
.../net/ethernet/marvell/octeontx2/nic/otx2_txrx.c | 24 +++++
4 files changed, 160 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
index 738d366..8585d30 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c
@@ -106,6 +106,119 @@ int otx2_hw_set_mtu(struct otx2_nic *pfvf, int mtu)
return err;
}
+static int otx2_set_flowkey_cfg(struct otx2_nic *pfvf)
+{
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ struct nix_rss_flowkey_cfg *req;
+ int err;
+
+ otx2_mbox_lock(&pfvf->mbox);
+ req = otx2_mbox_alloc_msg_nix_rss_flowkey_cfg(&pfvf->mbox);
+ if (!req) {
+ otx2_mbox_unlock(&pfvf->mbox);
+ return -ENOMEM;
+ }
+ req->mcam_index = -1; /* Default or reserved index */
+ req->flowkey_cfg = rss->flowkey_cfg;
+ req->group = DEFAULT_RSS_CONTEXT_GROUP;
+
+ err = otx2_sync_mbox_msg(&pfvf->mbox);
+ otx2_mbox_unlock(&pfvf->mbox);
+ return err;
+}
+
+static int otx2_set_rss_table(struct otx2_nic *pfvf)
+{
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ struct mbox *mbox = &pfvf->mbox;
+ struct nix_aq_enq_req *aq;
+ int idx, err;
+
+ otx2_mbox_lock(mbox);
+ /* Get memory to put this msg */
+ for (idx = 0; idx < rss->rss_size; idx++) {
+ aq = otx2_mbox_alloc_msg_nix_aq_enq(mbox);
+ if (!aq) {
+ /* The shared memory buffer can be full.
+ * Flush it and retry
+ */
+ err = otx2_sync_mbox_msg(mbox);
+ if (err) {
+ otx2_mbox_unlock(mbox);
+ return err;
+ }
+ aq = otx2_mbox_alloc_msg_nix_aq_enq(mbox);
+ if (!aq) {
+ otx2_mbox_unlock(mbox);
+ return -ENOMEM;
+ }
+ }
+
+ aq->rss.rq = rss->ind_tbl[idx];
+
+ /* Fill AQ info */
+ aq->qidx = idx;
+ aq->ctype = NIX_AQ_CTYPE_RSS;
+ aq->op = NIX_AQ_INSTOP_INIT;
+ }
+ err = otx2_sync_mbox_msg(mbox);
+ otx2_mbox_unlock(mbox);
+ return err;
+}
+
+static void otx2_set_rss_key(struct otx2_nic *pfvf)
+{
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ u64 *key = (u64 *)&rss->key[4];
+ int idx;
+
+ /* 352bit or 44byte key needs to be configured as below
+ * NIX_LF_RX_SECRETX0 = key<351:288>
+ * NIX_LF_RX_SECRETX1 = key<287:224>
+ * NIX_LF_RX_SECRETX2 = key<223:160>
+ * NIX_LF_RX_SECRETX3 = key<159:96>
+ * NIX_LF_RX_SECRETX4 = key<95:32>
+ * NIX_LF_RX_SECRETX5<63:32> = key<31:0>
+ */
+ otx2_write64(pfvf, NIX_LF_RX_SECRETX(5),
+ (u64)(*((u32 *)&rss->key)) << 32);
+ idx = sizeof(rss->key) / sizeof(u64);
+ while (idx > 0) {
+ idx--;
+ otx2_write64(pfvf, NIX_LF_RX_SECRETX(idx), *key++);
+ }
+}
+
+int otx2_rss_init(struct otx2_nic *pfvf)
+{
+ struct otx2_rss_info *rss = &pfvf->hw.rss_info;
+ int idx, ret = 0;
+
+ /* Enable RSS */
+ rss->enable = true;
+ rss->rss_size = sizeof(rss->ind_tbl);
+
+ /* Init RSS key here */
+ netdev_rss_key_fill(rss->key, sizeof(rss->key));
+ otx2_set_rss_key(pfvf);
+
+ /* Default indirection table */
+ for (idx = 0; idx < rss->rss_size; idx++)
+ rss->ind_tbl[idx] =
+ ethtool_rxfh_indir_default(idx, pfvf->hw.rx_queues);
+
+ ret = otx2_set_rss_table(pfvf);
+ if (ret)
+ return ret;
+
+ /* Default flowkey or hash config to be used for generating flow tag */
+ rss->flowkey_cfg = NIX_FLOW_KEY_TYPE_IPV4 | NIX_FLOW_KEY_TYPE_IPV6 |
+ NIX_FLOW_KEY_TYPE_TCP | NIX_FLOW_KEY_TYPE_UDP |
+ NIX_FLOW_KEY_TYPE_SCTP;
+
+ return otx2_set_flowkey_cfg(pfvf);
+}
+
void otx2_config_irq_coalescing(struct otx2_nic *pfvf, int qidx)
{
/* Configure CQE interrupt coalescing parameters
@@ -611,6 +724,8 @@ int otx2_config_nix(struct otx2_nic *pfvf)
nixlf->rq_cnt = pfvf->hw.rx_queues;
nixlf->sq_cnt = pfvf->hw.tx_queues;
nixlf->cq_cnt = pfvf->qset.cq_cnt;
+ nixlf->rss_sz = MAX_RSS_INDIR_TBL_SIZE;
+ nixlf->rss_grps = 1; /* Single RSS indir table supported, for now */
nixlf->xqe_sz = NIX_XQESZ_W16;
/* We don't know absolute NPA LF idx attached.
* AF will replace 'RVU_DEFAULT_PF_FUNC' with
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
index a843dc3..c032210 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.h
@@ -41,6 +41,16 @@ enum arua_mapped_qtypes {
#define NIX_LF_ERR_VEC 0x81
#define NIX_LF_POISON_VEC 0x82
+/* RSS configuration */
+struct otx2_rss_info {
+ u8 enable;
+ u32 flowkey_cfg;
+ u16 rss_size;
+ u8 ind_tbl[MAX_RSS_INDIR_TBL_SIZE];
+#define RSS_HASH_KEY_SIZE 44 /* 352 bit key */
+ u8 key[RSS_HASH_KEY_SIZE];
+};
+
/* NIX (or NPC) RX errors */
enum otx2_errlvl {
NPC_ERRLVL_RE,
@@ -95,6 +105,7 @@ struct mbox {
struct otx2_hw {
struct pci_dev *pdev;
+ struct otx2_rss_info rss_info;
u16 rx_queues;
u16 tx_queues;
u16 max_queues;
@@ -510,6 +521,9 @@ void otx2_ctx_disable(struct mbox *mbox, int type, bool npa);
void otx2_cleanup_rx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq);
void otx2_cleanup_tx_cqes(struct otx2_nic *pfvf, struct otx2_cq_queue *cq);
+/* RSS configuration APIs*/
+int otx2_rss_init(struct otx2_nic *pfvf);
+
/* Mbox handlers */
void mbox_handler_msix_offset(struct otx2_nic *pfvf,
struct msix_offset_rsp *rsp);
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
index 557f86b..fe5b3de 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c
@@ -838,6 +838,11 @@ int otx2_open(struct net_device *netdev)
if (err)
goto err_disable_napi;
+ /* Initialize RSS */
+ err = otx2_rss_init(pf);
+ if (err)
+ goto err_disable_napi;
+
/* Register Queue IRQ handlers */
vec = pf->hw.nix_msixoff + NIX_LF_QINT_VEC_START;
irq_name = &pf->hw.irq_name[vec * NAME_SIZE];
@@ -1249,7 +1254,8 @@ static int otx2_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pf->iommu_domain = iommu_get_domain_for_dev(dev);
netdev->hw_features = (NETIF_F_RXCSUM | NETIF_F_IP_CSUM |
- NETIF_F_IPV6_CSUM | NETIF_F_SG);
+ NETIF_F_IPV6_CSUM | NETIF_F_RXHASH |
+ NETIF_F_SG);
netdev->features |= netdev->hw_features;
netdev->hw_features |= NETIF_F_LOOPBACK | NETIF_F_RXALL;
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index cf2bbb7..f2de352 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -119,6 +119,28 @@ static void otx2_skb_add_frag(struct otx2_nic *pfvf, struct sk_buff *skb,
pfvf->rbsize, DMA_FROM_DEVICE);
}
+static void otx2_set_rxhash(struct otx2_nic *pfvf,
+ struct nix_cqe_rx_s *cqe, struct sk_buff *skb)
+{
+ enum pkt_hash_types hash_type = PKT_HASH_TYPE_NONE;
+ struct otx2_rss_info *rss;
+ u32 hash = 0;
+
+ if (!(pfvf->netdev->features & NETIF_F_RXHASH))
+ return;
+
+ rss = &pfvf->hw.rss_info;
+ if (rss->flowkey_cfg) {
+ if (rss->flowkey_cfg &
+ ~(NIX_FLOW_KEY_TYPE_IPV4 | NIX_FLOW_KEY_TYPE_IPV6))
+ hash_type = PKT_HASH_TYPE_L4;
+ else
+ hash_type = PKT_HASH_TYPE_L3;
+ hash = cqe->hdr.flow_tag;
+ }
+ skb_set_hash(skb, hash, hash_type);
+}
+
static bool otx2_check_rcv_errors(struct otx2_nic *pfvf,
struct nix_cqe_rx_s *cqe, int qidx)
{
@@ -199,6 +221,8 @@ static void otx2_rcv_pkt_handler(struct otx2_nic *pfvf,
cqe->sg.seg_size, parse);
cq->pool_ptrs++;
+ otx2_set_rxhash(pfvf, cqe, skb);
+
skb_record_rx_queue(skb, cq->cq_idx);
if (pfvf->netdev->features & NETIF_F_RXCSUM)
skb->ip_summed = CHECKSUM_UNNECESSARY;
--
2.7.4
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