/*-
* 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
* * 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
#include "virtio_ring.h"
#include "virtio_logs.h"
-#define mb() rte_mb()
-#define wmb() rte_wmb()
-#define rmb() rte_rmb()
+/*
+ * Per virtio_config.h in Linux.
+ * For virtio_pci on SMP, we don't need to order with respect to MMIO
+ * accesses through relaxed memory I/O windows, so smp_mb() et al are
+ * sufficient.
+ *
+ * This driver is for virtio_pci on SMP and therefore can assume
+ * weaker (compiler barriers)
+ */
+#define virtio_mb() rte_mb()
+#define virtio_rmb() rte_compiler_barrier()
+#define virtio_wmb() rte_compiler_barrier()
#ifdef RTE_PMD_PACKET_PREFETCH
#define rte_packet_prefetch(p) rte_prefetch1(p)
#define VIRTQUEUE_MAX_NAME_SZ 32
#define RTE_MBUF_DATA_DMA_ADDR(mb) \
- (uint64_t) ((mb)->buf_physaddr + (uint64_t)((char *)((mb)->pkt.data) - \
- (char *)(mb)->buf_addr))
+ (uint64_t) ((mb)->buf_physaddr + (mb)->data_off)
#define VTNET_SQ_RQ_QUEUE_IDX 0
#define VTNET_SQ_TQ_QUEUE_IDX 1
#define VIRTIO_NET_CTRL_RX_ALLUNI 2
#define VIRTIO_NET_CTRL_RX_NOMULTI 3
#define VIRTIO_NET_CTRL_RX_NOUNI 4
-#define VIRTIO_NET_CTRL_RX_NOBCAST 5
+#define VIRTIO_NET_CTRL_RX_NOBCAST 5
+
+/**
+ * Control the MAC
+ *
+ * The MAC filter table is managed by the hypervisor, the guest should
+ * assume the size is infinite. Filtering should be considered
+ * non-perfect, ie. based on hypervisor resources, the guest may
+ * received packets from sources not specified in the filter list.
+ *
+ * In addition to the class/cmd header, the TABLE_SET command requires
+ * two out scatterlists. Each contains a 4 byte count of entries followed
+ * by a concatenated byte stream of the ETH_ALEN MAC addresses. The
+ * first sg list contains unicast addresses, the second is for multicast.
+ * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
+ * is available.
+ *
+ * The ADDR_SET command requests one out scatterlist, it contains a
+ * 6 bytes MAC address. This functionality is present if the
+ * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
+ */
+struct virtio_net_ctrl_mac {
+ uint32_t entries;
+ uint8_t macs[][ETHER_ADDR_LEN];
+} __attribute__((__packed__));
+
+#define VIRTIO_NET_CTRL_MAC 1
+ #define VIRTIO_NET_CTRL_MAC_TABLE_SET 0
+ #define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
/**
* Control VLAN filtering
#define VIRTIO_NET_CTRL_VLAN_ADD 0
#define VIRTIO_NET_CTRL_VLAN_DEL 1
+struct virtio_net_ctrl_hdr {
+ uint8_t class;
+ uint8_t cmd;
+} __attribute__((packed));
+
+typedef uint8_t virtio_net_ctrl_ack;
+
+#define VIRTIO_NET_OK 0
+#define VIRTIO_NET_ERR 1
+
+#define VIRTIO_MAX_CTRL_DATA 2048
+
+struct virtio_pmd_ctrl {
+ struct virtio_net_ctrl_hdr hdr;
+ virtio_net_ctrl_ack status;
+ uint8_t data[VIRTIO_MAX_CTRL_DATA];
+};
+
struct virtqueue {
- char vq_name[VIRTQUEUE_MAX_NAME_SZ];
struct virtio_hw *hw; /**< virtio_hw structure pointer. */
const struct rte_memzone *mz; /**< mem zone to populate RX ring. */
const struct rte_memzone *virtio_net_hdr_mz; /**< memzone to populate hdr. */
struct rte_mempool *mpool; /**< mempool for mbuf allocation */
uint16_t queue_id; /**< DPDK queue index. */
uint8_t port_id; /**< Device port identifier. */
+ uint16_t vq_queue_index; /**< PCI queue index */
void *vq_ring_virt_mem; /**< linear address of vring*/
- int vq_alignment;
- int vq_ring_size;
+ unsigned int vq_ring_size;
phys_addr_t vq_ring_mem; /**< physical address of vring */
struct vring vq_ring; /**< vring keeping desc, used and avail */
uint16_t vq_free_cnt; /**< num of desc available */
uint16_t vq_nentries; /**< vring desc numbers */
- uint16_t vq_queue_index; /**< PCI queue index */
+ uint16_t vq_free_thresh; /**< free threshold */
/**
* Head of the free chain in the descriptor table. If
* there are no free descriptors, this will be set to
*/
uint16_t vq_used_cons_idx;
uint16_t vq_avail_idx;
- void *virtio_net_hdr_mem; /**< hdr for each xmit packet */
+ phys_addr_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
+
+ /* Statistics */
+ uint64_t packets;
+ uint64_t bytes;
+ uint64_t errors;
struct vq_desc_extra {
void *cookie;
} vq_descx[0];
};
+/* If multiqueue is provided by host, then we suppport it. */
+#ifndef VIRTIO_NET_F_MQ
+/* Device supports Receive Flow Steering */
+#define VIRTIO_NET_F_MQ 0x400000
+#define VIRTIO_NET_CTRL_MQ 4
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET 0
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN 1
+#define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX 0x8000
+#endif
+#ifndef VIRTIO_NET_F_CTRL_MAC_ADDR
+#define VIRTIO_NET_F_CTRL_MAC_ADDR 0x800000
+#define VIRTIO_NET_CTRL_MAC_ADDR_SET 1
+#endif
+
/**
* 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.
/**
* Get all mbufs to be freed.
*/
-struct rte_mbuf * virtqueue_detatch_unused(struct virtqueue *vq);
+struct rte_mbuf *virtqueue_detatch_unused(struct virtqueue *vq);
static inline int
virtqueue_full(const struct virtqueue *vq)
{
- return (vq->vq_free_cnt == 0);
+ return vq->vq_free_cnt == 0;
}
#define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx))
-static inline void __attribute__((always_inline))
+static inline void
vq_update_avail_idx(struct virtqueue *vq)
{
- rte_compiler_barrier();
+ virtio_wmb();
vq->vq_ring.avail->idx = vq->vq_avail_idx;
}
-static inline void __attribute__((always_inline))
+static inline void
vq_update_avail_ring(struct virtqueue *vq, uint16_t desc_idx)
{
uint16_t avail_idx;
/*
* Place the head of the descriptor chain into the next slot and make
- * it usable to the host. We wait to inform the host until after the burst
- * is complete to avoid cache alignment issues with descriptors. This
- * also helps to avoid any contention on the available index.
+ * it usable to the host. The chain is made available now rather than
+ * deferring to virtqueue_notify() in the hopes that if the host is
+ * currently running on another CPU, we can keep it processing the new
+ * descriptor.
*/
avail_idx = (uint16_t)(vq->vq_avail_idx & (vq->vq_nentries - 1));
vq->vq_ring.avail->ring[avail_idx] = desc_idx;
vq->vq_avail_idx++;
}
-static inline int __attribute__((always_inline))
-virtqueue_kick_prepare(struct virtqueue * vq)
+static inline int
+virtqueue_kick_prepare(struct virtqueue *vq)
{
return !(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY);
}
-static inline void __attribute__((always_inline))
+static inline void
virtqueue_notify(struct virtqueue *vq)
{
- /*
- * Ensure updated avail->idx is visible to host. mb() necessary?
+ /*
+ * Ensure updated avail->idx is visible to host.
* For virtio on IA, the notificaiton is through io port operation
* which is a serialization instruction itself.
*/
VIRTIO_WRITE_REG_2(vq->hw, VIRTIO_PCI_QUEUE_NOTIFY, vq->vq_queue_index);
}
-static inline void __attribute__((always_inline))
-vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
-{
- struct vring_desc *dp, *dp_tail;
- struct vq_desc_extra *dxp;
- uint16_t desc_idx_last = desc_idx;
-
- dp = &vq->vq_ring.desc[desc_idx];
- dxp = &vq->vq_descx[desc_idx];
- vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs);
- if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) {
- while (dp->flags & VRING_DESC_F_NEXT) {
- desc_idx_last = dp->next;
- dp = &vq->vq_ring.desc[dp->next];
- }
- }
- dxp->ndescs = 0;
-
- /*
- * We must append the existing free chain, if any, to the end of
- * newly freed chain. If the virtqueue was completely used, then
- * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above).
- */
- if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) {
- vq->vq_desc_head_idx = desc_idx;
- } else {
- dp_tail = &vq->vq_ring.desc[vq->vq_desc_tail_idx];
- dp_tail->next = desc_idx;
- }
-
- vq->vq_desc_tail_idx = desc_idx_last;
- dp->next = VQ_RING_DESC_CHAIN_END;
-}
-
-static inline int __attribute__((always_inline))
-virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf *cookie)
-{
- struct vq_desc_extra *dxp;
- struct vring_desc *start_dp;
- uint16_t needed;
- uint16_t head_idx, idx;
- needed = 1;
-
- if (unlikely(vq->vq_free_cnt == 0))
- return (-ENOSPC);
- if (unlikely(vq->vq_free_cnt < needed))
- return (-EMSGSIZE);
-
- head_idx = vq->vq_desc_head_idx;
- if (unlikely(head_idx >= vq->vq_nentries))
- return (-EFAULT);
-
- idx = head_idx;
- dxp = &vq->vq_descx[idx];
- dxp->cookie = (void *)cookie;
- dxp->ndescs = needed;
-
- start_dp = vq->vq_ring.desc;
- start_dp[idx].addr =
- (uint64_t) (cookie->buf_physaddr + RTE_PKTMBUF_HEADROOM - sizeof(struct virtio_net_hdr));
- start_dp[idx].len = cookie->buf_len - RTE_PKTMBUF_HEADROOM + sizeof(struct virtio_net_hdr);
- start_dp[idx].flags = VRING_DESC_F_WRITE;
- idx = start_dp[idx].next;
- vq->vq_desc_head_idx = idx;
- if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
- vq->vq_desc_tail_idx = idx;
- vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
- vq_update_avail_ring(vq, head_idx);
-
- return (0);
-}
-
-static inline int __attribute__((always_inline))
-virtqueue_enqueue_xmit(struct virtqueue *txvq, struct rte_mbuf *cookie)
-{
- struct vq_desc_extra *dxp;
- struct vring_desc *start_dp;
- uint16_t needed;
- uint16_t head_idx, idx;
- needed = 2;
- if (unlikely(txvq->vq_free_cnt == 0))
- return (-ENOSPC);
- if (unlikely(txvq->vq_free_cnt < needed))
- return (-EMSGSIZE);
- head_idx = txvq->vq_desc_head_idx;
- if (unlikely(head_idx >= txvq->vq_nentries))
- return (-EFAULT);
-
- idx = head_idx;
- dxp = &txvq->vq_descx[idx];
- if (dxp->cookie != NULL)
- rte_pktmbuf_free_seg(dxp->cookie);
- dxp->cookie = (void *)cookie;
- dxp->ndescs = needed;
-
- start_dp = txvq->vq_ring.desc;
- start_dp[idx].addr = (uint64_t)(uintptr_t)txvq->virtio_net_hdr_mem + idx * sizeof(struct virtio_net_hdr);
- start_dp[idx].len = sizeof(struct virtio_net_hdr);
- start_dp[idx].flags = VRING_DESC_F_NEXT;
- idx = start_dp[idx].next;
- start_dp[idx].addr = RTE_MBUF_DATA_DMA_ADDR(cookie);
- start_dp[idx].len = cookie->pkt.data_len;
- start_dp[idx].flags = 0;
- idx = start_dp[idx].next;
- txvq->vq_desc_head_idx = idx;
- if (txvq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
- txvq->vq_desc_tail_idx = idx;
- txvq->vq_free_cnt = (uint16_t)(txvq->vq_free_cnt - needed);
- vq_update_avail_ring(txvq, head_idx);
-
- return (0);
-}
-
-static inline uint16_t __attribute__((always_inline))
-virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts, uint32_t *len, uint16_t num)
-{
- struct vring_used_elem *uep;
- struct rte_mbuf *cookie;
- uint16_t used_idx, desc_idx;
- uint16_t i;
-
- /* Caller does the check */
- for (i = 0; i < num ; i ++) {
- used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
- uep = &vq->vq_ring.used->ring[used_idx];
- desc_idx = (uint16_t) uep->id;
- len[i] = uep->len;
- cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
-
- if (unlikely(cookie == NULL)) {
- PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u\n",
- vq->vq_used_cons_idx);
- break;
- }
-
- rte_prefetch0(cookie);
- rte_packet_prefetch(cookie->pkt.data);
- rx_pkts[i] = cookie;
- vq->vq_used_cons_idx++;
- vq_ring_free_chain(vq, desc_idx);
- vq->vq_descx[desc_idx].cookie = NULL;
- }
-
- return (i);
-}
-
-static inline uint16_t __attribute__((always_inline))
-virtqueue_dequeue_pkt_tx(struct virtqueue *vq)
-{
- struct vring_used_elem *uep;
- uint16_t used_idx, desc_idx;
-
- used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
- uep = &vq->vq_ring.used->ring[used_idx];
- desc_idx = (uint16_t) uep->id;
- vq->vq_used_cons_idx++;
- vq_ring_free_chain(vq, desc_idx);
-
- return 0;
-}
-
-#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
+#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
#define VIRTQUEUE_DUMP(vq) do { \
uint16_t used_idx, nused; \
used_idx = (vq)->vq_ring.used->idx; \
nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
PMD_INIT_LOG(DEBUG, \
- "VQ: %s - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
+ "VQ: - size=%d; free=%d; used=%d; desc_head_idx=%d;" \
" avail.idx=%d; used_cons_idx=%d; used.idx=%d;" \
- " avail.flags=0x%x; used.flags=0x%x\n", \
- (vq)->vq_name, (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
+ " avail.flags=0x%x; used.flags=0x%x", \
+ (vq)->vq_nentries, (vq)->vq_free_cnt, nused, \
(vq)->vq_desc_head_idx, (vq)->vq_ring.avail->idx, \
(vq)->vq_used_cons_idx, (vq)->vq_ring.used->idx, \
(vq)->vq_ring.avail->flags, (vq)->vq_ring.used->flags); \
git.droids-corp.org / dpdk.git / blobdiff