#include <rte_mempool.h>
#include <rte_net.h>
-#include "virtio_pci.h"
+#include "virtio.h"
#include "virtio_ring.h"
#include "virtio_logs.h"
#include "virtio_rxtx.h"
/*
* Per virtio_ring.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
+ * accesses through relaxed memory I/O windows, so thread_fence is
* sufficient.
*
* For using virtio to talk to real devices (eg. vDPA) we do need real
virtio_mb(uint8_t weak_barriers)
{
if (weak_barriers)
- rte_smp_mb();
+ rte_atomic_thread_fence(__ATOMIC_SEQ_CST);
else
rte_mb();
}
virtio_rmb(uint8_t weak_barriers)
{
if (weak_barriers)
- rte_smp_rmb();
+ rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
else
- rte_cio_rmb();
+ rte_io_rmb();
}
static inline void
virtio_wmb(uint8_t weak_barriers)
{
if (weak_barriers)
- rte_smp_wmb();
+ rte_atomic_thread_fence(__ATOMIC_RELEASE);
else
- rte_cio_wmb();
+ rte_io_wmb();
}
static inline uint16_t
uint16_t flags;
if (weak_barriers) {
-/* x86 prefers to using rte_smp_rmb over __atomic_load_n as it reports
+/* x86 prefers to using rte_io_rmb over __atomic_load_n as it reports
* a better perf(~1.5%), which comes from the saved branch by the compiler.
- * The if and else branch are identical with the smp and cio barriers both
- * defined as compiler barriers on x86.
+ * The if and else branch are identical on the platforms except Arm.
*/
-#ifdef RTE_ARCH_X86_64
- flags = dp->flags;
- rte_smp_rmb();
-#else
+#ifdef RTE_ARCH_ARM
flags = __atomic_load_n(&dp->flags, __ATOMIC_ACQUIRE);
+#else
+ flags = dp->flags;
+ rte_io_rmb();
#endif
} else {
flags = dp->flags;
- rte_cio_rmb();
+ rte_io_rmb();
}
return flags;
uint16_t flags, uint8_t weak_barriers)
{
if (weak_barriers) {
-/* x86 prefers to using rte_smp_wmb over __atomic_store_n as it reports
+/* x86 prefers to using rte_io_wmb over __atomic_store_n as it reports
* a better perf(~1.5%), which comes from the saved branch by the compiler.
- * The if and else branch are identical with the smp and cio barriers both
- * defined as compiler barriers on x86.
+ * The if and else branch are identical on the platforms except Arm.
*/
-#ifdef RTE_ARCH_X86_64
- rte_smp_wmb();
- dp->flags = flags;
-#else
+#ifdef RTE_ARCH_ARM
__atomic_store_n(&dp->flags, flags, __ATOMIC_RELEASE);
+#else
+ rte_io_wmb();
+ dp->flags = flags;
#endif
} else {
- rte_cio_wmb();
+ rte_io_wmb();
dp->flags = flags;
}
}
+
#ifdef RTE_PMD_PACKET_PREFETCH
#define rte_packet_prefetch(p) rte_prefetch1(p)
#else
#define VIRTQUEUE_MAX_NAME_SZ 32
-#ifdef RTE_VIRTIO_USER
/**
- * Return the physical address (or virtual address in case of
- * virtio-user) of mbuf data buffer.
+ * Return the IOVA (or virtual address in case of virtio-user) of mbuf
+ * data buffer.
*
* The address is firstly casted to the word size (sizeof(uintptr_t))
* before casting it to uint64_t. This is to make it work with different
* (virtio-pci and virtio-user).
*/
#define VIRTIO_MBUF_ADDR(mb, vq) \
- ((uint64_t)(*(uintptr_t *)((uintptr_t)(mb) + (vq)->offset)))
-#else
-#define VIRTIO_MBUF_ADDR(mb, vq) ((mb)->buf_iova)
-#endif
+ ((uint64_t)(*(uintptr_t *)((uintptr_t)(mb) + (vq)->mbuf_addr_offset)))
/**
* Return the physical address (or virtual address in case of
uint16_t next;
};
+#define virtnet_rxq_to_vq(rxvq) container_of(rxvq, struct virtqueue, rxq)
+#define virtnet_txq_to_vq(txvq) container_of(txvq, struct virtqueue, txq)
+#define virtnet_cq_to_vq(cvq) container_of(cvq, struct virtqueue, cq)
+
struct virtqueue {
struct virtio_hw *hw; /**< virtio_hw structure pointer. */
union {
uint16_t vq_avail_idx; /**< sync until needed */
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
+ * VQ_RING_DESC_CHAIN_END.
+ */
+ uint16_t vq_desc_head_idx;
+ uint16_t vq_desc_tail_idx;
+ uint16_t vq_queue_index; /**< PCI queue index */
+
void *vq_ring_virt_mem; /**< linear address of vring*/
unsigned int vq_ring_size;
+ uint16_t mbuf_addr_offset;
union {
struct virtnet_rx rxq;
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
- * there are no free descriptors, this will be set to
- * VQ_RING_DESC_CHAIN_END.
- */
- uint16_t vq_desc_head_idx;
- uint16_t vq_desc_tail_idx;
- uint16_t vq_queue_index; /**< PCI queue index */
- uint16_t offset; /**< relative offset to obtain addr in mbuf */
uint16_t *notify_addr;
struct rte_mbuf **sw_ring; /**< RX software ring. */
struct vq_desc_extra vq_descx[0];
#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]
- __rte_aligned(16);
+ union {
+ struct vring_desc tx_indir[VIRTIO_MAX_TX_INDIRECT];
+ struct vring_packed_desc
+ tx_packed_indir[VIRTIO_MAX_TX_INDIRECT];
+ } __rte_aligned(16);
};
static inline int
dp[i].next = VQ_RING_DESC_CHAIN_END;
}
+static inline void
+vring_desc_init_indirect_packed(struct vring_packed_desc *dp, int n)
+{
+ int i;
+ for (i = 0; i < n; i++) {
+ dp[i].id = (uint16_t)i;
+ dp[i].flags = VRING_DESC_F_WRITE;
+ }
+}
+
/**
* Tell the backend not to interrupt us. Implementation for packed virtqueues.
*/
static inline void
virtqueue_disable_intr(struct virtqueue *vq)
{
- if (vtpci_packed_queue(vq->hw))
+ if (virtio_with_packed_queue(vq->hw))
virtqueue_disable_intr_packed(vq);
else
virtqueue_disable_intr_split(vq);
static inline void
virtqueue_enable_intr(struct virtqueue *vq)
{
- if (vtpci_packed_queue(vq->hw))
+ if (virtio_with_packed_queue(vq->hw))
virtqueue_enable_intr_packed(vq);
else
virtqueue_enable_intr_split(vq);
}
static inline int
-virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx)
+virtio_get_queue_type(struct virtio_hw *hw, uint16_t vq_idx)
{
- if (vtpci_queue_idx == hw->max_queue_pairs * 2)
+ if (vq_idx == hw->max_queue_pairs * 2)
return VTNET_CQ;
- else if (vtpci_queue_idx % 2 == 0)
+ else if (vq_idx % 2 == 0)
return VTNET_RQ;
else
return VTNET_TQ;
}
-/* virtqueue_nused has load-acquire or rte_cio_rmb insed */
+/* virtqueue_nused has load-acquire or rte_io_rmb insed */
static inline uint16_t
virtqueue_nused(const struct virtqueue *vq)
{
* x86 prefers to using rte_smp_rmb over __atomic_load_n as it
* reports a slightly better perf, which comes from the saved
* branch by the compiler.
- * The if and else branches are identical with the smp and cio
+ * The if and else branches are identical with the smp and io
* barriers both defined as compiler barriers on x86.
*/
#ifdef RTE_ARCH_X86_64
#endif
} else {
idx = vq->vq_split.ring.used->idx;
- rte_cio_rmb();
+ rte_io_rmb();
}
return idx - vq->vq_used_cons_idx;
}
* it reports a slightly better perf, which comes from the
* saved branch by the compiler.
* The if and else branches are identical with the smp and
- * cio barriers both defined as compiler barriers on x86.
+ * io barriers both defined as compiler barriers on x86.
*/
#ifdef RTE_ARCH_X86_64
rte_smp_wmb();
vq->vq_avail_idx, __ATOMIC_RELEASE);
#endif
} else {
- rte_cio_wmb();
+ rte_io_wmb();
vq->vq_split.ring.avail->idx = vq->vq_avail_idx;
}
}
static inline void
virtqueue_notify(struct virtqueue *vq)
{
- VTPCI_OPS(vq->hw)->notify_queue(vq->hw, vq);
+ VIRTIO_OPS(vq->hw)->notify_queue(vq->hw, vq);
}
#ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
used_idx = __atomic_load_n(&(vq)->vq_split.ring.used->idx, \
__ATOMIC_RELAXED); \
nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
- if (vtpci_packed_queue((vq)->hw)) { \
+ if (virtio_with_packed_queue((vq)->hw)) { \
PMD_INIT_LOG(DEBUG, \
"VQ: - size=%d; free=%d; used_cons_idx=%d; avail_idx=%d;" \
" cached_flags=0x%x; used_wrap_counter=%d", \
/* avoid write operation when necessary, to lessen cache issues */
#define ASSIGN_UNLESS_EQUAL(var, val) do { \
- typeof(var) var_ = (var); \
- typeof(val) val_ = (val); \
- if ((var_) != (val_)) \
- (var_) = (val_); \
+ typeof(var) *const var_ = &(var); \
+ typeof(val) const val_ = (val); \
+ if (*var_ != val_) \
+ *var_ = val_; \
} while (0)
#define virtqueue_clear_net_hdr(hdr) do { \
} while (0)
static inline void
-virtqueue_xmit_offload(struct virtio_net_hdr *hdr,
- struct rte_mbuf *cookie,
- bool offload)
+virtqueue_xmit_offload(struct virtio_net_hdr *hdr, struct rte_mbuf *cookie)
{
- if (offload) {
- if (cookie->ol_flags & PKT_TX_TCP_SEG)
- cookie->ol_flags |= PKT_TX_TCP_CKSUM;
-
- switch (cookie->ol_flags & PKT_TX_L4_MASK) {
- case PKT_TX_UDP_CKSUM:
- hdr->csum_start = cookie->l2_len + cookie->l3_len;
- hdr->csum_offset = offsetof(struct rte_udp_hdr,
- dgram_cksum);
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- break;
-
- case PKT_TX_TCP_CKSUM:
- hdr->csum_start = cookie->l2_len + cookie->l3_len;
- hdr->csum_offset = offsetof(struct rte_tcp_hdr, cksum);
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- break;
-
- default:
- ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
- ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
- ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
- break;
- }
+ uint64_t csum_l4 = cookie->ol_flags & PKT_TX_L4_MASK;
+ uint16_t o_l23_len = (cookie->ol_flags & PKT_TX_TUNNEL_MASK) ?
+ cookie->outer_l2_len + cookie->outer_l3_len : 0;
+
+ if (cookie->ol_flags & PKT_TX_TCP_SEG)
+ csum_l4 |= PKT_TX_TCP_CKSUM;
+
+ switch (csum_l4) {
+ case PKT_TX_UDP_CKSUM:
+ hdr->csum_start = o_l23_len + cookie->l2_len + cookie->l3_len;
+ hdr->csum_offset = offsetof(struct rte_udp_hdr, dgram_cksum);
+ hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ break;
+
+ case PKT_TX_TCP_CKSUM:
+ hdr->csum_start = o_l23_len + cookie->l2_len + cookie->l3_len;
+ hdr->csum_offset = offsetof(struct rte_tcp_hdr, cksum);
+ hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ break;
+
+ default:
+ ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
+ break;
+ }
- /* TCP Segmentation Offload */
- if (cookie->ol_flags & PKT_TX_TCP_SEG) {
- hdr->gso_type = (cookie->ol_flags & PKT_TX_IPV6) ?
- VIRTIO_NET_HDR_GSO_TCPV6 :
- VIRTIO_NET_HDR_GSO_TCPV4;
- hdr->gso_size = cookie->tso_segsz;
- hdr->hdr_len =
- cookie->l2_len +
- cookie->l3_len +
- cookie->l4_len;
- } else {
- ASSIGN_UNLESS_EQUAL(hdr->gso_type, 0);
- ASSIGN_UNLESS_EQUAL(hdr->gso_size, 0);
- ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
- }
+ /* TCP Segmentation Offload */
+ if (cookie->ol_flags & PKT_TX_TCP_SEG) {
+ hdr->gso_type = (cookie->ol_flags & PKT_TX_IPV6) ?
+ VIRTIO_NET_HDR_GSO_TCPV6 :
+ VIRTIO_NET_HDR_GSO_TCPV4;
+ hdr->gso_size = cookie->tso_segsz;
+ hdr->hdr_len = o_l23_len + cookie->l2_len + cookie->l3_len +
+ cookie->l4_len;
+ } else {
+ ASSIGN_UNLESS_EQUAL(hdr->gso_type, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->gso_size, 0);
+ ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
}
}
static inline void
virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
- uint16_t needed, int can_push, int in_order)
+ uint16_t needed, int use_indirect, int can_push,
+ int in_order)
{
struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
struct vq_desc_extra *dxp;
- struct virtqueue *vq = txvq->vq;
+ struct virtqueue *vq = virtnet_txq_to_vq(txvq);
struct vring_packed_desc *start_dp, *head_dp;
uint16_t idx, id, head_idx, head_flags;
int16_t head_size = vq->hw->vtnet_hdr_size;
struct virtio_net_hdr *hdr;
uint16_t prev;
bool prepend_header = false;
+ uint16_t seg_num = cookie->nb_segs;
id = in_order ? vq->vq_avail_idx : vq->vq_desc_head_idx;
/* if offload disabled, it is not zeroed below, do it now */
if (!vq->hw->has_tx_offload)
virtqueue_clear_net_hdr(hdr);
+ } else if (use_indirect) {
+ /* setup tx ring slot to point to indirect
+ * descriptor list stored in reserved region.
+ *
+ * the first slot in indirect ring is already preset
+ * to point to the header in reserved region
+ */
+ start_dp[idx].addr = txvq->virtio_net_hdr_mem +
+ RTE_PTR_DIFF(&txr[idx].tx_packed_indir, txr);
+ start_dp[idx].len = (seg_num + 1) *
+ sizeof(struct vring_packed_desc);
+ /* Packed descriptor id needs to be restored when inorder. */
+ if (in_order)
+ start_dp[idx].id = idx;
+ /* reset flags for indirect desc */
+ head_flags = VRING_DESC_F_INDIRECT;
+ head_flags |= vq->vq_packed.cached_flags;
+ hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
+
+ /* loop below will fill in rest of the indirect elements */
+ start_dp = txr[idx].tx_packed_indir;
+ idx = 1;
} else {
/* setup first tx ring slot to point to header
* stored in reserved region.
}
}
- virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
+ if (vq->hw->has_tx_offload)
+ virtqueue_xmit_offload(hdr, cookie);
do {
uint16_t flags;
start_dp[prev].id = id;
+ if (use_indirect) {
+ idx = head_idx;
+ if (++idx >= vq->vq_nentries) {
+ idx -= vq->vq_nentries;
+ vq->vq_packed.cached_flags ^=
+ VRING_PACKED_DESC_F_AVAIL_USED;
+ }
+ }
+
vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
vq->vq_avail_idx = idx;
}
static void
-virtio_xmit_cleanup_inorder_packed(struct virtqueue *vq, int num)
+virtio_xmit_cleanup_inorder_packed(struct virtqueue *vq, uint16_t num)
{
uint16_t used_idx, id, curr_id, free_cnt = 0;
uint16_t size = vq->vq_nentries;
struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
struct vq_desc_extra *dxp;
+ int nb = num;
used_idx = vq->vq_used_cons_idx;
- /* desc_is_used has a load-acquire or rte_cio_rmb inside
+ /* desc_is_used has a load-acquire or rte_io_rmb inside
* and wait for used desc in virtqueue.
*/
- while (num > 0 && desc_is_used(&desc[used_idx], vq)) {
+ while (nb > 0 && desc_is_used(&desc[used_idx], vq)) {
id = desc[used_idx].id;
do {
curr_id = used_idx;
dxp = &vq->vq_descx[used_idx];
used_idx += dxp->ndescs;
free_cnt += dxp->ndescs;
- num -= dxp->ndescs;
+ nb -= dxp->ndescs;
if (used_idx >= size) {
used_idx -= size;
vq->vq_packed.used_wrap_counter ^= 1;
}
static void
-virtio_xmit_cleanup_normal_packed(struct virtqueue *vq, int num)
+virtio_xmit_cleanup_normal_packed(struct virtqueue *vq, uint16_t num)
{
uint16_t used_idx, id;
uint16_t size = vq->vq_nentries;
struct vq_desc_extra *dxp;
used_idx = vq->vq_used_cons_idx;
- /* desc_is_used has a load-acquire or rte_cio_rmb inside
+ /* desc_is_used has a load-acquire or rte_io_rmb inside
* and wait for used desc in virtqueue.
*/
while (num-- && desc_is_used(&desc[used_idx], vq)) {
/* Cleanup from completed transmits. */
static inline void
-virtio_xmit_cleanup_packed(struct virtqueue *vq, int num, int in_order)
+virtio_xmit_cleanup_packed(struct virtqueue *vq, uint16_t num, int in_order)
{
if (in_order)
virtio_xmit_cleanup_inorder_packed(vq, num);
git.droids-corp.org / dpdk.git / blobdiff