X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtqueue.h;h=d8ae5cdec40242bd8e271bc284988b87e29348bc;hb=9070f88b81dab42739fb169265e3ea727e47dfa2;hp=9c4f96d2b44605ec4e3b400bc83aaee0663e06cc;hpb=9ff41aa7a0640eb80a37ed38fe4f1d78fb31d796;p=dpdk.git diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index 9c4f96d2b4..d8ae5cdec4 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -1,34 +1,5 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2010-2014 Intel Corporation */ #ifndef _VIRTQUEUE_H_ @@ -38,7 +9,6 @@ #include #include -#include #include #include "virtio_pci.h" @@ -80,7 +50,7 @@ struct rte_mbuf; #define VIRTIO_MBUF_ADDR(mb, vq) \ ((uint64_t)(*(uintptr_t *)((uintptr_t)(mb) + (vq)->offset))) #else -#define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_physaddr) +#define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_iova) #endif /** @@ -159,6 +129,17 @@ struct virtio_net_ctrl_mac { #define VIRTIO_NET_CTRL_VLAN_ADD 0 #define VIRTIO_NET_CTRL_VLAN_DEL 1 +/* + * Control link announce acknowledgement + * + * The command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that + * driver has recevied the notification; device would clear the + * VIRTIO_NET_S_ANNOUNCE bit in the status field after it receives + * this command. + */ +#define VIRTIO_NET_CTRL_ANNOUNCE 3 +#define VIRTIO_NET_CTRL_ANNOUNCE_ACK 0 + struct virtio_net_ctrl_hdr { uint8_t class; uint8_t cmd; @@ -180,11 +161,17 @@ struct virtio_pmd_ctrl { struct vq_desc_extra { void *cookie; uint16_t ndescs; + uint16_t next; }; struct virtqueue { struct virtio_hw *hw; /**< virtio_hw structure pointer. */ struct vring vq_ring; /**< vring keeping desc, used and avail */ + struct vring_packed ring_packed; /**< vring keeping descs */ + bool avail_wrap_counter; + bool used_wrap_counter; + uint16_t event_flags_shadow; + uint16_t avail_used_flags; /** * Last consumed descriptor in the used table, * trails vq_ring.used->idx. @@ -204,8 +191,8 @@ struct virtqueue { struct virtnet_ctl cq; }; - phys_addr_t vq_ring_mem; /**< physical address of vring, - * or virtual address for virtio_user. */ + rte_iova_t vq_ring_mem; /**< physical address of vring, + * or virtual address for virtio_user. */ /** * Head of the free chain in the descriptor table. If @@ -227,8 +214,6 @@ struct virtqueue { #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1 #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000 -#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1 - /** * This is the first element of the scatter-gather list. If you don't * specify GSO or CSUM features, you can simply ignore the header. @@ -262,13 +247,42 @@ struct virtio_net_hdr_mrg_rxbuf { #define VIRTIO_MAX_TX_INDIRECT 8 struct virtio_tx_region { struct virtio_net_hdr_mrg_rxbuf tx_hdr; - struct vring_desc tx_indir[VIRTIO_MAX_TX_INDIRECT] - __attribute__((__aligned__(16))); + union { + struct vring_desc tx_indir[VIRTIO_MAX_TX_INDIRECT] + __attribute__((__aligned__(16))); + struct vring_packed_desc tx_indir_pq[VIRTIO_MAX_TX_INDIRECT] + __attribute__((__aligned__(16))); + }; }; +static inline int +desc_is_used(struct vring_packed_desc *desc, struct virtqueue *vq) +{ + uint16_t used, avail, flags; + + flags = desc->flags; + used = !!(flags & VRING_DESC_F_USED(1)); + avail = !!(flags & VRING_DESC_F_AVAIL(1)); + + return avail == used && used == vq->used_wrap_counter; +} + + +static inline void +vring_desc_init_packed(struct virtqueue *vq, int n) +{ + int i; + for (i = 0; i < n - 1; i++) { + vq->ring_packed.desc_packed[i].id = i; + vq->vq_descx[i].next = i + 1; + } + vq->ring_packed.desc_packed[i].id = i; + vq->vq_descx[i].next = VQ_RING_DESC_CHAIN_END; +} + /* Chain all the descriptors in the ring with an END */ static inline void -vring_desc_init(struct vring_desc *dp, uint16_t n) +vring_desc_init_split(struct vring_desc *dp, uint16_t n) { uint16_t i; @@ -277,13 +291,53 @@ vring_desc_init(struct vring_desc *dp, uint16_t n) dp[i].next = VQ_RING_DESC_CHAIN_END; } +/** + * Tell the backend not to interrupt us. + */ +static inline void +virtqueue_disable_intr_packed(struct virtqueue *vq) +{ + uint16_t *event_flags = &vq->ring_packed.driver_event->desc_event_flags; + + *event_flags = RING_EVENT_FLAGS_DISABLE; +} + + /** * Tell the backend not to interrupt us. */ static inline void virtqueue_disable_intr(struct virtqueue *vq) { - vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; + if (vtpci_packed_queue(vq->hw)) + virtqueue_disable_intr_packed(vq); + else + vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; +} + +/** + * Tell the backend to interrupt. Implementation for packed virtqueues. + */ +static inline void +virtqueue_enable_intr_packed(struct virtqueue *vq) +{ + uint16_t *event_flags = &vq->ring_packed.driver_event->desc_event_flags; + + + if (vq->event_flags_shadow == RING_EVENT_FLAGS_DISABLE) { + virtio_wmb(); + vq->event_flags_shadow = RING_EVENT_FLAGS_ENABLE; + *event_flags = vq->event_flags_shadow; + } +} + +/** + * Tell the backend to interrupt. Implementation for split virtqueues. + */ +static inline void +virtqueue_enable_intr_split(struct virtqueue *vq) +{ + vq->vq_ring.avail->flags &= (~VRING_AVAIL_F_NO_INTERRUPT); } /** @@ -292,7 +346,10 @@ virtqueue_disable_intr(struct virtqueue *vq) static inline void virtqueue_enable_intr(struct virtqueue *vq) { - vq->vq_ring.avail->flags &= (~VRING_AVAIL_F_NO_INTERRUPT); + if (vtpci_packed_queue(vq->hw)) + virtqueue_enable_intr_packed(vq); + else + virtqueue_enable_intr_split(vq); } /** @@ -302,7 +359,10 @@ void virtqueue_dump(struct virtqueue *vq); /** * Get all mbufs to be freed. */ -struct rte_mbuf *virtqueue_detatch_unused(struct virtqueue *vq); +struct rte_mbuf *virtqueue_detach_unused(struct virtqueue *vq); + +/* Flush the elements in the used ring. */ +void virtqueue_rxvq_flush(struct virtqueue *vq); static inline int virtqueue_full(const struct virtqueue *vq) @@ -310,8 +370,24 @@ virtqueue_full(const struct virtqueue *vq) return vq->vq_free_cnt == 0; } +static inline int +virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx) +{ + if (vtpci_queue_idx == hw->max_queue_pairs * 2) + return VTNET_CQ; + else if (vtpci_queue_idx % 2 == 0) + return VTNET_RQ; + else + return VTNET_TQ; +} + #define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx)) +void vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx); +void vq_ring_free_chain_packed(struct virtqueue *vq, uint16_t used_idx); +void vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, + uint16_t num); + static inline void vq_update_avail_idx(struct virtqueue *vq) { @@ -342,6 +418,17 @@ virtqueue_kick_prepare(struct virtqueue *vq) return !(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY); } +static inline int +virtqueue_kick_prepare_packed(struct virtqueue *vq) +{ + uint16_t flags; + + virtio_mb(); + flags = vq->ring_packed.device_event->desc_event_flags; + + return flags != RING_EVENT_FLAGS_DISABLE; +} + static inline void virtqueue_notify(struct virtqueue *vq) { @@ -358,6 +445,15 @@ virtqueue_notify(struct virtqueue *vq) uint16_t used_idx, nused; \ used_idx = (vq)->vq_ring.used->idx; \ nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \ + if (vtpci_packed_queue((vq)->hw)) { \ + PMD_INIT_LOG(DEBUG, \ + "VQ: - size=%d; free=%d; used_cons_idx=%d; avail_idx=%d;" \ + "VQ: - avail_wrap_counter=%d; used_wrap_counter=%d", \ + (vq)->vq_nentries, (vq)->vq_free_cnt, (vq)->vq_used_cons_idx, \ + (vq)->vq_avail_idx, (vq)->avail_wrap_counter, \ + (vq)->used_wrap_counter); \ + break; \ + } \ PMD_INIT_LOG(DEBUG, \ "VQ: - size=%d; free=%d; used=%d; desc_head_idx=%d;" \ " avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \