From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 0DB0E1B31B for ; Mon, 29 Jan 2018 15:11:55 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E6846C0587DB; Mon, 29 Jan 2018 14:11:53 +0000 (UTC) Received: from localhost (dhcp-192-241.str.redhat.com [10.33.192.241]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8353A17CF8; Mon, 29 Jan 2018 14:11:53 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, yliu@fridaylinux.org, maxime.coquelin@redhat.com, mst@redhat.com Date: Mon, 29 Jan 2018 15:11:30 +0100 Message-Id: <20180129141143.13437-2-jfreimann@redhat.com> In-Reply-To: <20180129141143.13437-1-jfreimann@redhat.com> References: <20180129141143.13437-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 29 Jan 2018 14:11:54 +0000 (UTC) Subject: [dpdk-dev] [PATCH 01/14] net/virtio: vring init for packed queues X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Jan 2018 14:11:55 -0000 Add and initialize descriptor data structures. Signed-off-by: Jens Freimann --- drivers/net/virtio/virtio_ethdev.c | 22 ++++++++++++---------- drivers/net/virtio/virtio_pci.h | 8 ++++++++ drivers/net/virtio/virtio_ring.h | 25 +++++++++++++++++++++++-- drivers/net/virtio/virtqueue.h | 10 ++++++++++ 4 files changed, 53 insertions(+), 12 deletions(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index 65cb71fa6..825b6c303 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -310,19 +310,21 @@ virtio_init_vring(struct virtqueue *vq) PMD_INIT_FUNC_TRACE(); - /* - * Reinitialise since virtio port might have been stopped and restarted - */ memset(ring_mem, 0, vq->vq_ring_size); - vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); - vq->vq_used_cons_idx = 0; - vq->vq_desc_head_idx = 0; - vq->vq_avail_idx = 0; - vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); + vring_init(vq->hw, vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); + vq->vq_free_cnt = vq->vq_nentries; memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); + vq->vq_used_cons_idx = 0; + vq->vq_avail_idx = 0; + if (vtpci_packed_queue(vq->hw)) { + vring_desc_init_1_1(vr, size); + } else { + vq->vq_desc_head_idx = 0; + vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); - vring_desc_init(vr->desc, size); + vring_desc_init(vr->desc, size); + } /* * Disable device(host) interrupting guest @@ -397,7 +399,7 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) /* * Reserve a memzone for vring elements */ - size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); + size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN); vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size); diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h index a28ba8339..307a116d2 100644 --- a/drivers/net/virtio/virtio_pci.h +++ b/drivers/net/virtio/virtio_pci.h @@ -112,6 +112,8 @@ struct virtnet_ctl; #define VIRTIO_F_VERSION_1 32 #define VIRTIO_F_IOMMU_PLATFORM 33 +#define VIRTIO_F_PACKED 34 +#define VIRTIO_F_IN_ORDER 35 /* * Some VirtIO feature bits (currently bits 28 through 31) are @@ -304,6 +306,12 @@ vtpci_with_feature(struct virtio_hw *hw, uint64_t bit) return (hw->guest_features & (1ULL << bit)) != 0; } +static inline int +vtpci_packed_queue(struct virtio_hw *hw) +{ + return vtpci_with_feature(hw, VIRTIO_F_PACKED); +} + /* * Function declaration from virtio_pci.c */ diff --git a/drivers/net/virtio/virtio_ring.h b/drivers/net/virtio/virtio_ring.h index 9e3c2a015..1cafef41b 100644 --- a/drivers/net/virtio/virtio_ring.h +++ b/drivers/net/virtio/virtio_ring.h @@ -9,6 +9,7 @@ #include + /* This marks a buffer as continuing via the next field. */ #define VRING_DESC_F_NEXT 1 /* This marks a buffer as write-only (otherwise read-only). */ @@ -54,11 +55,23 @@ struct vring_used { struct vring_used_elem ring[0]; }; +/* For support of packed virtqueues in Virtio 1.1 the format of descriptors + * looks like this. + */ +struct vring_desc_1_1 { + uint64_t addr; + uint32_t len; + uint16_t index; + uint16_t flags; +}; + + struct vring { unsigned int num; struct vring_desc *desc; struct vring_avail *avail; struct vring_used *used; + struct vring_desc_1_1 *desc_1_1; }; /* The standard layout for the ring is a continuous chunk of memory which @@ -95,10 +108,13 @@ struct vring { #define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num]) static inline size_t -vring_size(unsigned int num, unsigned long align) +vring_size(struct virtio_hw *hw, unsigned int num, unsigned long align) { size_t size; + if (vtpci_packed_queue(hw)) + return num * sizeof(struct vring_desc_1_1); + size = num * sizeof(struct vring_desc); size += sizeof(struct vring_avail) + (num * sizeof(uint16_t)); size = RTE_ALIGN_CEIL(size, align); @@ -108,10 +124,15 @@ vring_size(unsigned int num, unsigned long align) } static inline void -vring_init(struct vring *vr, unsigned int num, uint8_t *p, +vring_init(struct virtio_hw *hw, struct vring *vr, unsigned int num, uint8_t *p, unsigned long align) { vr->num = num; + if (vtpci_packed_queue(hw)) { + vr->desc_1_1 = (struct vring_desc_1_1 *)p; + return; + } + vr->desc = (struct vring_desc *) p; vr->avail = (struct vring_avail *) (p + num * sizeof(struct vring_desc)); diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index 2d9599218..0cc9268a4 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -245,6 +245,16 @@ struct virtio_tx_region { __attribute__((__aligned__(16))); }; +static inline void +vring_desc_init_1_1(struct vring *vr, int n) +{ + int i; + for (i = 0; i < n; i++) { + struct vring_desc_1_1 *desc = &vr->desc_1_1[i]; + desc->index = i; + } +} + /* Chain all the descriptors in the ring with an END */ static inline void vring_desc_init(struct vring_desc *dp, uint16_t n) -- 2.14.3