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GET /api/patches/66695/?format=api
{ "id": 66695, "url": "http://patches.dpdk.org/api/patches/66695/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/1584351224-23500-4-git-send-email-hkalra@marvell.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<1584351224-23500-4-git-send-email-hkalra@marvell.com>", "list_archive_url": "https://inbox.dpdk.org/dev/1584351224-23500-4-git-send-email-hkalra@marvell.com", "date": "2020-03-16T09:33:39", "name": "[3/8] net/octeontx: add fast mbuf free support", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "66068a3012bb58a4b1a7ecdf20a1ee6a36679610", "submitter": { "id": 1182, "url": "http://patches.dpdk.org/api/people/1182/?format=api", "name": "Harman Kalra", "email": "hkalra@marvell.com" }, "delegate": { "id": 310, "url": "http://patches.dpdk.org/api/users/310/?format=api", "username": "jerin", "first_name": "Jerin", "last_name": "Jacob", "email": "jerinj@marvell.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/1584351224-23500-4-git-send-email-hkalra@marvell.com/mbox/", "series": [ { "id": 8923, "url": "http://patches.dpdk.org/api/series/8923/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=8923", "date": "2020-03-16T09:33:36", "name": "add new features to octeontx PMD", "version": 1, "mbox": "http://patches.dpdk.org/series/8923/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/66695/comments/", "check": "fail", "checks": "http://patches.dpdk.org/api/patches/66695/checks/", "tags": {}, "related": [], "headers": { "Return-Path": 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"HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n VCcP9fozoNvIzdZpBiaTpyo9pSMiOVgnVbhXQ4Qi9rSlCfUNGBYQwrEF8HVzu6d/tCskP5xhPsTgFQifZAtoXw==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "MN2PR18MB3117", "X-OriginatorOrg": "marvell.com", "X-Proofpoint-Virus-Version": "vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572\n definitions=2020-03-16_02:2020-03-12,\n 2020-03-16 signatures=0", "Subject": "[dpdk-dev] [PATCH 3/8] net/octeontx: add fast mbuf free support", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n <mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n <mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "This patch adds capability to fast release of mbuf\nfollowing successful transmission.\n\nSigned-off-by: Harman Kalra <hkalra@marvell.com>\n---\n drivers/net/octeontx/octeontx_ethdev.c | 4 +-\n drivers/net/octeontx/octeontx_ethdev.h | 1 +\n drivers/net/octeontx/octeontx_rxtx.c | 9 +--\n drivers/net/octeontx/octeontx_rxtx.h | 93 ++++++++++++++++++++++++--\n 4 files changed, 98 insertions(+), 9 deletions(-)", "diff": "diff --git a/drivers/net/octeontx/octeontx_ethdev.c b/drivers/net/octeontx/octeontx_ethdev.c\nindex d6adbbc93..97b4298fe 100644\n--- a/drivers/net/octeontx/octeontx_ethdev.c\n+++ b/drivers/net/octeontx/octeontx_ethdev.c\n@@ -267,7 +267,9 @@ octeontx_tx_offload_flags(struct rte_eth_dev *eth_dev)\n \tstruct octeontx_nic *nic = octeontx_pmd_priv(eth_dev);\n \tuint16_t flags = 0;\n \n-\t/* Created function for supoorting future offloads */\n+\tif (!(nic->tx_offloads & DEV_TX_OFFLOAD_MBUF_FAST_FREE))\n+\t\tflags |= OCCTX_TX_OFFLOAD_MBUF_NOFF_F;\n+\n \tif (nic->tx_offloads & DEV_TX_OFFLOAD_MULTI_SEGS)\n \t\tflags |= OCCTX_TX_MULTI_SEG_F;\n \ndiff --git a/drivers/net/octeontx/octeontx_ethdev.h b/drivers/net/octeontx/octeontx_ethdev.h\nindex 06223e6e7..1abe1703b 100644\n--- a/drivers/net/octeontx/octeontx_ethdev.h\n+++ b/drivers/net/octeontx/octeontx_ethdev.h\n@@ -34,6 +34,7 @@\n \t\t\t\t\t DEV_RX_OFFLOAD_JUMBO_FRAME)\n \n #define OCTEONTX_TX_OFFLOADS\t\t(DEV_TX_OFFLOAD_MT_LOCKFREE | \\\n+\t\t\t\t\t DEV_TX_OFFLOAD_MBUF_FAST_FREE | \\\n \t\t\t\t\t DEV_TX_OFFLOAD_MULTI_SEGS)\n \n static inline struct octeontx_nic *\ndiff --git a/drivers/net/octeontx/octeontx_rxtx.c b/drivers/net/octeontx/octeontx_rxtx.c\nindex 3de88e187..c817f7179 100644\n--- a/drivers/net/octeontx/octeontx_rxtx.c\n+++ b/drivers/net/octeontx/octeontx_rxtx.c\n@@ -41,7 +41,7 @@ octeontx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)\n \treturn count; /* return number of pkts received */\n }\n \n-#define T(name, f1, sz, flags)\t\t\t\t\t\\\n+#define T(name, f1, f0, sz, flags)\t\t\t\t\t\\\n static uint16_t __rte_noinline\t__hot\t\t\t\t\t\\\n octeontx_xmit_pkts_ ##name(void *tx_queue,\t\t\t\t\\\n \t\t\tstruct rte_mbuf **tx_pkts, uint16_t pkts)\t\\\n@@ -60,14 +60,15 @@ octeontx_set_tx_function(struct rte_eth_dev *dev)\n {\n \tstruct octeontx_nic *nic = octeontx_pmd_priv(dev);\n \n-\tconst eth_tx_burst_t tx_burst_func[2] = {\n-#define T(name, f0, sz, flags)\t\t\t\\\n-\t[f0] = octeontx_xmit_pkts_ ##name,\n+\tconst eth_tx_burst_t tx_burst_func[2][2] = {\n+#define T(name, f1, f0, sz, flags)\t\t\t\\\n+\t[f1][f0] = octeontx_xmit_pkts_ ##name,\n \n OCCTX_TX_FASTPATH_MODES\n #undef T\n \t};\n \n \tdev->tx_pkt_burst = tx_burst_func\n+\t\t[!!(nic->tx_offload_flags & OCCTX_TX_OFFLOAD_MBUF_NOFF_F)]\n \t\t[!!(nic->tx_offload_flags & OCCTX_TX_MULTI_SEG_F)];\n }\ndiff --git a/drivers/net/octeontx/octeontx_rxtx.h b/drivers/net/octeontx/octeontx_rxtx.h\nindex 6182cd8ee..2383a8eb6 100644\n--- a/drivers/net/octeontx/octeontx_rxtx.h\n+++ b/drivers/net/octeontx/octeontx_rxtx.h\n@@ -22,6 +22,7 @@\n #define OCCTX_RX_MULTI_SEG_F\t\tBIT(15)\n \n #define OCCTX_TX_OFFLOAD_NONE\t\t(0)\n+#define OCCTX_TX_OFFLOAD_MBUF_NOFF_F\tBIT(3)\n \n #define OCCTX_TX_MULTI_SEG_F\t\tBIT(15)\n /* Packet type table */\n@@ -114,9 +115,75 @@ ptype_table[PTYPE_SIZE][PTYPE_SIZE][PTYPE_SIZE] = {\n };\n \n \n+static __rte_always_inline uint64_t\n+octeontx_pktmbuf_detach(struct rte_mbuf *m)\n+{\n+\tstruct rte_mempool *mp = m->pool;\n+\tuint32_t mbuf_size, buf_len;\n+\tstruct rte_mbuf *md;\n+\tuint16_t priv_size;\n+\tuint16_t refcount;\n+\n+\t/* Update refcount of direct mbuf */\n+\tmd = rte_mbuf_from_indirect(m);\n+\trefcount = rte_mbuf_refcnt_update(md, -1);\n+\n+\tpriv_size = rte_pktmbuf_priv_size(mp);\n+\tmbuf_size = (uint32_t)(sizeof(struct rte_mbuf) + priv_size);\n+\tbuf_len = rte_pktmbuf_data_room_size(mp);\n+\n+\tm->priv_size = priv_size;\n+\tm->buf_addr = (char *)m + mbuf_size;\n+\tm->buf_iova = rte_mempool_virt2iova(m) + mbuf_size;\n+\tm->buf_len = (uint16_t)buf_len;\n+\trte_pktmbuf_reset_headroom(m);\n+\tm->data_len = 0;\n+\tm->ol_flags = 0;\n+\tm->next = NULL;\n+\tm->nb_segs = 1;\n+\n+\t/* Now indirect mbuf is safe to free */\n+\trte_pktmbuf_free(m);\n+\n+\tif (refcount == 0) {\n+\t\trte_mbuf_refcnt_set(md, 1);\n+\t\tmd->data_len = 0;\n+\t\tmd->ol_flags = 0;\n+\t\tmd->next = NULL;\n+\t\tmd->nb_segs = 1;\n+\t\treturn 0;\n+\t} else {\n+\t\treturn 1;\n+\t}\n+}\n+\n+static __rte_always_inline uint64_t\n+octeontx_prefree_seg(struct rte_mbuf *m)\n+{\n+\tif (likely(rte_mbuf_refcnt_read(m) == 1)) {\n+\t\tif (!RTE_MBUF_DIRECT(m))\n+\t\t\treturn octeontx_pktmbuf_detach(m);\n+\n+\t\tm->next = NULL;\n+\t\tm->nb_segs = 1;\n+\t\treturn 0;\n+\t} else if (rte_mbuf_refcnt_update(m, -1) == 0) {\n+\t\tif (!RTE_MBUF_DIRECT(m))\n+\t\t\treturn octeontx_pktmbuf_detach(m);\n+\n+\t\trte_mbuf_refcnt_set(m, 1);\n+\t\tm->next = NULL;\n+\t\tm->nb_segs = 1;\n+\t\treturn 0;\n+\t}\n+\n+\t/* Mbuf is having refcount more than 1 so need not to be freed */\n+\treturn 1;\n+}\n+\n static __rte_always_inline uint16_t\n __octeontx_xmit_prepare(struct rte_mbuf *tx_pkt, uint64_t *cmd_buf,\n-\t\t\tconst uint16_t flag __rte_unused)\n+\t\t\tconst uint16_t flag)\n {\n \tuint16_t gaura_id, nb_desc = 0;\n \n@@ -124,6 +191,13 @@ __octeontx_xmit_prepare(struct rte_mbuf *tx_pkt, uint64_t *cmd_buf,\n \tcmd_buf[nb_desc++] = tx_pkt->data_len & 0xffff;\n \tcmd_buf[nb_desc++] = 0x0;\n \n+\t/* SEND_HDR[DF] bit controls if buffer is to be freed or\n+\t * not, as SG_DESC[I] and SEND_HDR[II] are clear.\n+\t */\n+\tif (flag & OCCTX_TX_OFFLOAD_MBUF_NOFF_F)\n+\t\tcmd_buf[0] |= (octeontx_prefree_seg(tx_pkt) <<\n+\t\t\t 58);\n+\n \t/* Mark mempool object as \"put\" since it is freed by PKO */\n \tif (!(cmd_buf[0] & (1ULL << 58)))\n \t\t__mempool_check_cookies(tx_pkt->pool, (void **)&tx_pkt,\n@@ -144,7 +218,7 @@ __octeontx_xmit_prepare(struct rte_mbuf *tx_pkt, uint64_t *cmd_buf,\n \n static __rte_always_inline uint16_t\n __octeontx_xmit_mseg_prepare(struct rte_mbuf *tx_pkt, uint64_t *cmd_buf,\n-\t\t\tconst uint16_t flag __rte_unused)\n+\t\t\tconst uint16_t flag)\n {\n \tuint16_t nb_segs, nb_desc = 0;\n \tuint16_t gaura_id, len = 0;\n@@ -169,6 +243,14 @@ __octeontx_xmit_mseg_prepare(struct rte_mbuf *tx_pkt, uint64_t *cmd_buf,\n \t\t\t\t PKO_SEND_GATHER_GAUAR((long)gaura_id) |\n \t\t\t\t tx_pkt->data_len;\n \n+\t\t/* SG_DESC[I] bit controls if buffer is to be freed or\n+\t\t * not, as SEND_HDR[DF] and SEND_HDR[II] are clear.\n+\t\t */\n+\t\tif (flag & OCCTX_TX_OFFLOAD_MBUF_NOFF_F) {\n+\t\t\tcmd_buf[nb_desc] |=\n+\t\t\t (octeontx_prefree_seg(tx_pkt) << 57);\n+\t\t}\n+\n \t\t/* Mark mempool object as \"put\" since it is freed by\n \t\t * PKO.\n \t\t */\n@@ -222,10 +304,13 @@ __octeontx_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,\n uint16_t\n octeontx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts);\n \n+#define NOFF_F OCCTX_TX_OFFLOAD_MBUF_NOFF_F\n #define MULT_F OCCTX_TX_MULTI_SEG_F\n /* [NOFF] [MULTI_SEG] */\n #define OCCTX_TX_FASTPATH_MODES\t\t\t\t\t\t \\\n-T(no_offload,\t\t\t\t0,\t4, OCCTX_TX_OFFLOAD_NONE) \\\n-T(mseg,\t\t\t\t\t1,\t14, MULT_F)\t\t \\\n+T(no_offload,\t\t\t\t0, 0,\t4, OCCTX_TX_OFFLOAD_NONE) \\\n+T(mseg,\t\t\t\t\t0, 1,\t14, MULT_F)\t\t \\\n+T(noff,\t\t\t\t\t1, 0,\t4, NOFF_F)\t\t \\\n+T(noff_mseg,\t\t\t\t1, 1,\t14, NOFF_F | MULT_F)\n \n #endif /* __OCTEONTX_RXTX_H__ */\n", "prefixes": [ "3/8" ] }