From patchwork Tue Aug 13 22:19:39 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neel Patel X-Patchwork-Id: 266935 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 49F002C010A for ; Wed, 14 Aug 2013 08:20:01 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759344Ab3HMWTq (ORCPT ); Tue, 13 Aug 2013 18:19:46 -0400 Received: from mtv-iport-2.cisco.com ([173.36.130.13]:29720 "EHLO mtv-iport-2.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758606Ab3HMWTp (ORCPT ); Tue, 13 Aug 2013 18:19:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=17077; q=dns/txt; s=iport; t=1376432384; x=1377641984; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=miIPQz7/IDQXCASyH3Fpt6wlvvA9eNr3LxrM0Z4V15E=; b=XyNWf9xvUyhhynb5deOjcGAXJt9fTkUW6BcAh0oswjaxyIIEnG6Gfgjp 2jr5HbfBgqotYss7QN7VNS+r76P47z/gvWVpT4sd+TC0m7czQeg9WGXMj L55XAvYke/QP/zVkFyJ7y2jpyffsZKDaJsOh5ZOP1q24ewuHM2DOrvwkH E=; X-IronPort-AV: E=Sophos;i="4.89,873,1367971200"; d="scan'208";a="89092550" Received: from mtv-core-4.cisco.com ([171.68.58.9]) by mtv-iport-2.cisco.com with ESMTP; 13 Aug 2013 22:19:44 +0000 Received: from savbu-picasso-lnx1.cisco.com (savbu-picasso-lnx1.cisco.com [10.193.199.106]) by mtv-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id r7DMJf5T001502; Tue, 13 Aug 2013 22:19:42 GMT From: Neel Patel To: netdev@vger.kernel.org Cc: Neel Patel Subject: [PATCH v2 1/3] drivers/net: enic: Adding support for Cisco Low Latency NIC Date: Tue, 13 Aug 2013 15:19:39 -0700 Message-Id: <1376432381-5546-2-git-send-email-neepatel@cisco.com> X-Mailer: git-send-email 1.8.4-rc0 In-Reply-To: <1376432381-5546-1-git-send-email-neepatel@cisco.com> References: <1376432381-5546-1-git-send-email-neepatel@cisco.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch, - Adds new firmware commands for the new Cisco Low Latency NIC (aka. USNIC). - Enables descriptor prefetch on the hardware. This feature reduces latency for small packet transmit. Signed-off-by: Neel Patel Signed-off-by: Nishank Trivedi Signed-off-by: Christian Benvenuti --- drivers/net/ethernet/cisco/enic/enic.h | 2 +- drivers/net/ethernet/cisco/enic/enic_res.h | 9 +- drivers/net/ethernet/cisco/enic/vnic_dev.c | 5 + drivers/net/ethernet/cisco/enic/vnic_dev.h | 1 + drivers/net/ethernet/cisco/enic/vnic_devcmd.h | 176 +++++++++++++++++++++++++- drivers/net/ethernet/cisco/enic/vnic_rq.c | 5 +- drivers/net/ethernet/cisco/enic/vnic_rq.h | 5 +- drivers/net/ethernet/cisco/enic/vnic_wq.c | 3 - drivers/net/ethernet/cisco/enic/vnic_wq.h | 86 ++++++++++++- 9 files changed, 275 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h index 2e37c63..75e842d 100644 --- a/drivers/net/ethernet/cisco/enic/enic.h +++ b/drivers/net/ethernet/cisco/enic/enic.h @@ -33,7 +33,7 @@ #define DRV_NAME "enic" #define DRV_DESCRIPTION "Cisco VIC Ethernet NIC Driver" #define DRV_VERSION "2.1.1.39" -#define DRV_COPYRIGHT "Copyright 2008-2011 Cisco Systems, Inc" +#define DRV_COPYRIGHT "Copyright 2008-2013 Cisco Systems, Inc" #define ENIC_BARS_MAX 6 diff --git a/drivers/net/ethernet/cisco/enic/enic_res.h b/drivers/net/ethernet/cisco/enic/enic_res.h index 25be273..69f60af 100644 --- a/drivers/net/ethernet/cisco/enic/enic_res.h +++ b/drivers/net/ethernet/cisco/enic/enic_res.h @@ -47,6 +47,9 @@ static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq, int offload_mode, int cq_entry, int sop, int eop, int loopback) { struct wq_enet_desc *desc = vnic_wq_next_desc(wq); + u8 desc_skip_cnt = 1; + u8 compressed_send = 0; + u64 wrid = 0; wq_enet_desc_enc(desc, (u64)dma_addr | VNIC_PADDR_TARGET, @@ -59,7 +62,8 @@ static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq, (u16)vlan_tag, (u8)loopback); - vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop); + vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop, desc_skip_cnt, + (u8)cq_entry, compressed_send, wrid); } static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq, @@ -120,6 +124,7 @@ static inline void enic_queue_rq_desc(struct vnic_rq *rq, dma_addr_t dma_addr, unsigned int len) { struct rq_enet_desc *desc = vnic_rq_next_desc(rq); + u64 wrid = 0; u8 type = os_buf_index ? RQ_ENET_TYPE_NOT_SOP : RQ_ENET_TYPE_ONLY_SOP; @@ -127,7 +132,7 @@ static inline void enic_queue_rq_desc(struct vnic_rq *rq, (u64)dma_addr | VNIC_PADDR_TARGET, type, (u16)len); - vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len); + vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len, wrid); } struct enic; diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.c b/drivers/net/ethernet/cisco/enic/vnic_dev.c index 97455c5..1b436b3 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_dev.c +++ b/drivers/net/ethernet/cisco/enic/vnic_dev.c @@ -970,6 +970,11 @@ err_out: return NULL; } +struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev) +{ + return vdev->pdev; +} + int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len) { u64 a0, a1 = len; diff --git a/drivers/net/ethernet/cisco/enic/vnic_dev.h b/drivers/net/ethernet/cisco/enic/vnic_dev.h index f3d9b79..e670029 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_dev.h +++ b/drivers/net/ethernet/cisco/enic/vnic_dev.h @@ -127,6 +127,7 @@ int vnic_dev_set_ig_vlan_rewrite_mode(struct vnic_dev *vdev, struct vnic_dev *vnic_dev_register(struct vnic_dev *vdev, void *priv, struct pci_dev *pdev, struct vnic_dev_bar *bar, unsigned int num_bars); +struct pci_dev *vnic_dev_get_pdev(struct vnic_dev *vdev); int vnic_dev_init_prov2(struct vnic_dev *vdev, u8 *buf, u32 len); int vnic_dev_enable2(struct vnic_dev *vdev, int active); int vnic_dev_enable2_done(struct vnic_dev *vdev, int *status); diff --git a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h index 23d5552..b9a0d78 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_devcmd.h +++ b/drivers/net/ethernet/cisco/enic/vnic_devcmd.h @@ -281,11 +281,25 @@ enum vnic_devcmd_cmd { * 0 if no VIF-CONFIG-INFO TLV was ever received. */ CMD_CONFIG_INFO_GET = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 44), + /* INT13 API: (u64)a0=paddr to vnic_int13_params struct + * (u32)a1=INT13_CMD_xxx + */ + CMD_INT13_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 45), + + /* Set default vlan: + * in: (u16)a0=new default vlan + * (u16)a1=zero for overriding vlan with param a0, + * non-zero for resetting vlan to the default + * out: (u16)a0=old default vlan + */ + CMD_SET_DEFAULT_VLAN = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 46), + /* init_prov_info2: * Variant of CMD_INIT_PROV_INFO, where it will not try to enable * the vnic until CMD_ENABLE2 is issued. * (u64)a0=paddr of vnic_devcmd_provinfo - * (u32)a1=sizeof provision info */ + * (u32)a1=sizeof provision info + */ CMD_INIT_PROV_INFO2 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 47), /* enable2: @@ -339,16 +353,57 @@ enum vnic_devcmd_cmd { CMD_INTR_COAL_CONVERT = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 50), /* - * cmd_set_mac_addr - * set mac address + * Set the predefined mac address as default * in: * (u48)a0 = mac addr - * */ CMD_SET_MAC_ADDR = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 55), + + /* Update the provisioning info of the given VIF + * (u64)a0=paddr of vnic_devcmd_provinfo + * (u32)a1=sizeof provision info + */ + CMD_PROV_INFO_UPDATE = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 56), + + /* Add a filter. + * in: (u64) a0= filter address + * (u32) a1= size of filter + * out: (u32) a0=filter identifier + */ + CMD_ADD_FILTER = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ENET, 58), + + /* Delete a filter. + * in: (u32) a0=filter identifier + */ + CMD_DEL_FILTER = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 59), + + /* Enable a Queue Pair in User space NIC + * in: (u32) a0=Queue Pair number + * (u32) a1= command + */ + CMD_QP_ENABLE = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 60), + + /* Disable a Queue Pair in User space NIC + * in: (u32) a0=Queue Pair number + * (u32) a1= command + */ + CMD_QP_DISABLE = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 61), + + /* Stats dump Queue Pair in User space NIC + * in: (u32) a0=Queue Pair number + * (u64) a1=host buffer addr for status dump + * (u32) a2=length of the buffer + */ + CMD_QP_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 62), + + /* Clear stats for Queue Pair in User space NIC + * in: (u32) a0=Queue Pair number + */ + CMD_QP_STATS_CLEAR = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ENET, 63), }; /* CMD_ENABLE2 flags */ +#define CMD_ENABLE2_STANDBY 0x0 #define CMD_ENABLE2_ACTIVE 0x1 /* flags for CMD_OPEN */ @@ -364,6 +419,9 @@ enum vnic_devcmd_cmd { #define CMD_PFILTER_PROMISCUOUS 0x08 #define CMD_PFILTER_ALL_MULTICAST 0x10 +/* Commands for CMD_QP_ENABLE/CM_QP_DISABLE */ +#define CMD_QP_RQWQ 0x0 + /* rewrite modes for CMD_IG_VLAN_REWRITE_MODE */ #define IG_VLAN_REWRITE_MODE_DEFAULT_TRUNK 0 #define IG_VLAN_REWRITE_MODE_UNTAG_DEFAULT_VLAN 1 @@ -390,6 +448,7 @@ enum vnic_devcmd_error { ERR_EMAXRES = 10, ERR_ENOTSUPPORTED = 11, ERR_EINPROGRESS = 12, + ERR_MAX }; /* @@ -435,6 +494,115 @@ struct vnic_devcmd_provinfo { u8 data[0]; }; +/* These are used in flags field of different filters to denote + * valid fields used. + */ +#define FILTER_FIELD_VALID(fld) (1 << (fld - 1)) + +#define FILTER_FIELDS_USNIC ( \ + FILTER_FIELD_VALID(1) | \ + FILTER_FIELD_VALID(2) | \ + FILTER_FIELD_VALID(3) | \ + FILTER_FIELD_VALID(4)) + +#define FILTER_FIELDS_IPV4_5TUPLE ( \ + FILTER_FIELD_VALID(1) | \ + FILTER_FIELD_VALID(2) | \ + FILTER_FIELD_VALID(3) | \ + FILTER_FIELD_VALID(4) | \ + FILTER_FIELD_VALID(5)) + +#define FILTER_FIELDS_MAC_VLAN ( \ + FILTER_FIELD_VALID(1) | \ + FILTER_FIELD_VALID(2)) + +#define FILTER_FIELD_USNIC_VLAN FILTER_FIELD_VALID(1) +#define FILTER_FIELD_USNIC_ETHTYPE FILTER_FIELD_VALID(2) +#define FILTER_FIELD_USNIC_PROTO FILTER_FIELD_VALID(3) +#define FILTER_FIELD_USNIC_ID FILTER_FIELD_VALID(4) + +struct filter_usnic_id { + u32 flags; + u16 vlan; + u16 ethtype; + u8 proto_version; + u32 usnic_id; +} __packed; + +#define FILTER_FIELD_5TUP_PROTO FILTER_FIELD_VALID(1) +#define FILTER_FIELD_5TUP_SRC_AD FILTER_FIELD_VALID(2) +#define FILTER_FIELD_5TUP_DST_AD FILTER_FIELD_VALID(3) +#define FILTER_FIELD_5TUP_SRC_PT FILTER_FIELD_VALID(4) +#define FILTER_FIELD_5TUP_DST_PT FILTER_FIELD_VALID(5) + +/* Enums for the protocol field. */ +enum protocol_e { + PROTO_UDP = 0, + PROTO_TCP = 1, +}; + +struct filter_ipv4_5tuple { + u32 flags; + u32 protocol; + u32 src_addr; + u32 dst_addr; + u16 src_port; + u16 dst_port; +} __packed; + +#define FILTER_FIELD_VMQ_VLAN FILTER_FIELD_VALID(1) +#define FILTER_FIELD_VMQ_MAC FILTER_FIELD_VALID(2) + +struct filter_mac_vlan { + u32 flags; + u16 vlan; + u8 mac_addr[6]; +} __packed; + +/* Specifies the filter_action type. */ +enum { + FILTER_ACTION_RQ_STEERING = 0, + FILTER_ACTION_MAX +}; + +struct filter_action { + u32 type; + union { + u32 rq_idx; + } u; +} __packed; + +/* Specifies the filter type. */ +enum filter_type { + FILTER_USNIC_ID = 0, + FILTER_IPV4_5TUPLE = 1, + FILTER_MAC_VLAN = 2, + FILTER_MAX +}; + +struct filter { + u32 type; + union { + struct filter_usnic_id usnic; + struct filter_ipv4_5tuple ipv4; + struct filter_mac_vlan mac_vlan; + } u; +} __packed; + +enum { + CLSF_TLV_FILTER = 0, + CLSF_TLV_ACTION = 1, +}; + +/* Maximum size of buffer to CMD_ADD_FILTER */ +#define FILTER_MAX_BUF_SIZE 100 + +struct filter_tlv { + u_int32_t type; + u_int32_t length; + u_int32_t val[0]; +}; + /* * Writing cmd register causes STAT_BUSY to get set in status register. * When cmd completes, STAT_BUSY will be cleared. diff --git a/drivers/net/ethernet/cisco/enic/vnic_rq.c b/drivers/net/ethernet/cisco/enic/vnic_rq.c index 7e1488f..36a2ed6 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_rq.c +++ b/drivers/net/ethernet/cisco/enic/vnic_rq.c @@ -30,12 +30,9 @@ static int vnic_rq_alloc_bufs(struct vnic_rq *rq) { struct vnic_rq_buf *buf; - struct vnic_dev *vdev; unsigned int i, j, count = rq->ring.desc_count; unsigned int blks = VNIC_RQ_BUF_BLKS_NEEDED(count); - vdev = rq->vdev; - for (i = 0; i < blks; i++) { rq->bufs[i] = kzalloc(VNIC_RQ_BUF_BLK_SZ(count), GFP_ATOMIC); if (!rq->bufs[i]) @@ -141,7 +138,7 @@ void vnic_rq_init(struct vnic_rq *rq, unsigned int cq_index, unsigned int error_interrupt_enable, unsigned int error_interrupt_offset) { - u32 fetch_index; + u32 fetch_index = 0; /* Use current fetch_index as the ring starting point */ fetch_index = ioread32(&rq->ctrl->fetch_index); diff --git a/drivers/net/ethernet/cisco/enic/vnic_rq.h b/drivers/net/ethernet/cisco/enic/vnic_rq.h index 2056586..ee7bc95 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_rq.h +++ b/drivers/net/ethernet/cisco/enic/vnic_rq.h @@ -72,6 +72,7 @@ struct vnic_rq_buf { unsigned int len; unsigned int index; void *desc; + uint64_t wr_id; }; struct vnic_rq { @@ -110,7 +111,8 @@ static inline unsigned int vnic_rq_next_index(struct vnic_rq *rq) static inline void vnic_rq_post(struct vnic_rq *rq, void *os_buf, unsigned int os_buf_index, - dma_addr_t dma_addr, unsigned int len) + dma_addr_t dma_addr, unsigned int len, + uint64_t wrid) { struct vnic_rq_buf *buf = rq->to_use; @@ -118,6 +120,7 @@ static inline void vnic_rq_post(struct vnic_rq *rq, buf->os_buf_index = os_buf_index; buf->dma_addr = dma_addr; buf->len = len; + buf->wr_id = wrid; buf = buf->next; rq->to_use = buf; diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.c b/drivers/net/ethernet/cisco/enic/vnic_wq.c index 5e0d7a2..3e6b8d5 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.c +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.c @@ -30,12 +30,9 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq) { struct vnic_wq_buf *buf; - struct vnic_dev *vdev; unsigned int i, j, count = wq->ring.desc_count; unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count); - vdev = wq->vdev; - for (i = 0; i < blks; i++) { wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC); if (!wq->bufs[i]) diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.h b/drivers/net/ethernet/cisco/enic/vnic_wq.h index 7dd937a..b655667 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.h +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.h @@ -58,6 +58,10 @@ struct vnic_wq_buf { unsigned int index; int sop; void *desc; + uint64_t wr_id; /* Cookie */ + uint8_t cq_entry; /* Gets completion event from hw */ + uint8_t desc_skip_cnt; /* Num descs to occupy */ + uint8_t compressed_send; /* Both hdr and payload in one desc */ }; /* Break the vnic_wq_buf allocations into blocks of 32/64 entries */ @@ -100,16 +104,94 @@ static inline void *vnic_wq_next_desc(struct vnic_wq *wq) return wq->to_use->desc; } +#define PI_LOG2_CACHE_LINE_SIZE 5 +#define PI_INDEX_BITS 12 +#define PI_INDEX_MASK ((1U << PI_INDEX_BITS) - 1) +#define PI_PREFETCH_LEN_MASK ((1U << PI_LOG2_CACHE_LINE_SIZE) - 1) +#define PI_PREFETCH_LEN_OFF 16 +#define PI_PREFETCH_ADDR_BITS 43 +#define PI_PREFETCH_ADDR_MASK ((1ULL << PI_PREFETCH_ADDR_BITS) - 1) +#define PI_PREFETCH_ADDR_OFF 21 + +/* How many cache lines are touched by buffer (addr, len). */ +static inline unsigned int num_cache_lines_touched(dma_addr_t addr, + unsigned int len) +{ + const unsigned long mask = PI_PREFETCH_LEN_MASK; + const unsigned long laddr = (unsigned long)addr; + unsigned long lines, equiv_len; + /* A. If addr is aligned, our solution is just to round up len to the + * next boundary. + * + * e.g. addr = 0, len = 48 + * +--------------------+ + * |XXXXXXXXXXXXXXXXXXXX| 32-byte cacheline a + * +--------------------+ + * |XXXXXXXXXX | cacheline b + * +--------------------+ + * + * B. If addr is not aligned, however, we may use an extra + * cacheline. e.g. addr = 12, len = 22 + * + * +--------------------+ + * | XXXXXXXXXXXXX| + * +--------------------+ + * |XX | + * +--------------------+ + * + * Our solution is to make the problem equivalent to case A + * above by adding the empty space in the first cacheline to the length: + * unsigned long len; + * + * +--------------------+ + * |eeeeeeeXXXXXXXXXXXXX| "e" is empty space, which we add to len + * +--------------------+ + * |XX | + * +--------------------+ + */ + equiv_len = len + (laddr & mask); + + /* Now we can just round up this len to the next 32-byte boundary. */ + lines = (equiv_len + mask) & (~mask); + + /* Scale bytes -> cachelines. */ + return lines >> PI_LOG2_CACHE_LINE_SIZE; +} + +static inline u64 vnic_cached_posted_index(dma_addr_t addr, + unsigned int len, unsigned int index) +{ + unsigned int num_cache_lines = num_cache_lines_touched(addr, len); + /* Wish we could avoid a branch here. We could have separate + * vnic_wq_post() and vinc_wq_post_inline(), the latter + * only supporting < 1k (2^5 * 2^5) sends, I suppose. This would + * eliminate the if (eop) branch as well. + */ + if (num_cache_lines > PI_PREFETCH_LEN_MASK) + num_cache_lines = 0; + return (index & PI_INDEX_MASK) | + ((num_cache_lines & PI_PREFETCH_LEN_MASK) + << PI_PREFETCH_LEN_OFF) | + (((addr >> PI_LOG2_CACHE_LINE_SIZE) & + PI_PREFETCH_ADDR_MASK) << PI_PREFETCH_ADDR_OFF); +} + static inline void vnic_wq_post(struct vnic_wq *wq, void *os_buf, dma_addr_t dma_addr, - unsigned int len, int sop, int eop) + unsigned int len, int sop, int eop, + uint8_t desc_skip_cnt, uint8_t cq_entry, + uint8_t compressed_send, uint64_t wrid) { struct vnic_wq_buf *buf = wq->to_use; buf->sop = sop; + buf->cq_entry = cq_entry; + buf->compressed_send = compressed_send; + buf->desc_skip_cnt = desc_skip_cnt; buf->os_buf = eop ? os_buf : NULL; buf->dma_addr = dma_addr; buf->len = len; + buf->wr_id = wrid; buf = buf->next; if (eop) { @@ -123,7 +205,7 @@ static inline void vnic_wq_post(struct vnic_wq *wq, } wq->to_use = buf; - wq->ring.desc_avail--; + wq->ring.desc_avail -= desc_skip_cnt; } static inline void vnic_wq_service(struct vnic_wq *wq,