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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, david.marchand@redhat.com,
eperezma@redhat.com
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [PATCH v1 03/21] net/virtio: virtqueue headers alloc refactoring
Date: Wed, 30 Nov 2022 16:56:21 +0100
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This patch refactors virtqueue initialization by moving
its headers allocation and deallocation in dedicated
function.
While at it, it renames the memzone metadata and address
pointers in the virtnet_tx and virtnet_ctl structures to
remove redundant virtio_net_ prefix.
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
drivers/net/virtio/virtio_cvq.c | 19 ++--
drivers/net/virtio/virtio_cvq.h | 9 +-
drivers/net/virtio/virtio_ethdev.c | 149 ++++++++++++++++++-----------
drivers/net/virtio/virtio_rxtx.c | 12 +--
drivers/net/virtio/virtio_rxtx.h | 12 +--
drivers/net/virtio/virtqueue.c | 8 +-
drivers/net/virtio/virtqueue.h | 13 +--
7 files changed, 126 insertions(+), 96 deletions(-)
diff --git a/drivers/net/virtio/virtio_cvq.c b/drivers/net/virtio/virtio_cvq.c
index cd25614df8..5e457f5fd0 100644
--- a/drivers/net/virtio/virtio_cvq.c
+++ b/drivers/net/virtio/virtio_cvq.c
@@ -34,7 +34,7 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
*/
head = vq->vq_avail_idx;
flags = vq->vq_packed.cached_flags;
- desc[head].addr = cvq->virtio_net_hdr_mem;
+ desc[head].addr = cvq->hdr_mem;
desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
vq->vq_free_cnt--;
nb_descs++;
@@ -44,7 +44,7 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
}
for (k = 0; k < pkt_num; k++) {
- desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
+ desc[vq->vq_avail_idx].addr = cvq->hdr_mem
+ sizeof(struct virtio_net_ctrl_hdr)
+ sizeof(ctrl->status) + sizeof(uint8_t) * sum;
desc[vq->vq_avail_idx].len = dlen[k];
@@ -60,7 +60,7 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
}
}
- desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
+ desc[vq->vq_avail_idx].addr = cvq->hdr_mem
+ sizeof(struct virtio_net_ctrl_hdr);
desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
@@ -103,7 +103,7 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
vq->vq_packed.cached_flags,
vq->vq_packed.used_wrap_counter);
- result = cvq->virtio_net_hdr_mz->addr;
+ result = cvq->hdr_mz->addr;
return result;
}
@@ -126,14 +126,14 @@ virtio_send_command_split(struct virtnet_ctl *cvq,
* One RX packet for ACK.
*/
vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
- vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
+ vq->vq_split.ring.desc[head].addr = cvq->hdr_mem;
vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
vq->vq_free_cnt--;
i = vq->vq_split.ring.desc[head].next;
for (k = 0; k < pkt_num; k++) {
vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
- vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
+ vq->vq_split.ring.desc[i].addr = cvq->hdr_mem
+ sizeof(struct virtio_net_ctrl_hdr)
+ sizeof(ctrl->status) + sizeof(uint8_t) * sum;
vq->vq_split.ring.desc[i].len = dlen[k];
@@ -143,7 +143,7 @@ virtio_send_command_split(struct virtnet_ctl *cvq,
}
vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
- vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
+ vq->vq_split.ring.desc[i].addr = cvq->hdr_mem
+ sizeof(struct virtio_net_ctrl_hdr);
vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
vq->vq_free_cnt--;
@@ -186,7 +186,7 @@ virtio_send_command_split(struct virtnet_ctl *cvq,
PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
vq->vq_free_cnt, vq->vq_desc_head_idx);
- result = cvq->virtio_net_hdr_mz->addr;
+ result = cvq->hdr_mz->addr;
return result;
}
@@ -216,8 +216,7 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, int *
return -1;
}
- memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
- sizeof(struct virtio_pmd_ctrl));
+ memcpy(cvq->hdr_mz->addr, ctrl, sizeof(struct virtio_pmd_ctrl));
if (virtio_with_packed_queue(vq->hw))
result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
diff --git a/drivers/net/virtio/virtio_cvq.h b/drivers/net/virtio/virtio_cvq.h
index 224dc81422..226561e6b8 100644
--- a/drivers/net/virtio/virtio_cvq.h
+++ b/drivers/net/virtio/virtio_cvq.h
@@ -106,11 +106,10 @@ struct virtio_net_ctrl_hdr {
typedef uint8_t virtio_net_ctrl_ack;
struct virtnet_ctl {
- /**< memzone to populate hdr. */
- const struct rte_memzone *virtio_net_hdr_mz;
- rte_iova_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
- uint16_t port_id; /**< Device port identifier. */
- const struct rte_memzone *mz; /**< mem zone to populate CTL ring. */
+ const struct rte_memzone *hdr_mz; /**< memzone to populate hdr. */
+ rte_iova_t hdr_mem; /**< hdr for each xmit packet */
+ uint16_t port_id; /**< Device port identifier. */
+ const struct rte_memzone *mz; /**< mem zone to populate CTL ring. */
rte_spinlock_t lock; /**< spinlock for control queue. */
void (*notify_queue)(struct virtqueue *vq, void *cookie); /**< notify ops. */
void *notify_cookie; /**< cookie for notify ops */
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 8db8771f4d..cead5f0884 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -259,19 +259,97 @@ virtio_control_queue_notify(struct virtqueue *vq, __rte_unused void *cookie)
virtqueue_notify(vq);
}
+static int
+virtio_alloc_queue_headers(struct virtqueue *vq, int numa_node, const char *name)
+{
+ char hdr_name[VIRTQUEUE_MAX_NAME_SZ];
+ const struct rte_memzone **hdr_mz;
+ rte_iova_t *hdr_mem;
+ ssize_t size;
+ int queue_type;
+
+ queue_type = virtio_get_queue_type(vq->hw, vq->vq_queue_index);
+ switch (queue_type) {
+ case VTNET_TQ:
+ /*
+ * For each xmit packet, allocate a virtio_net_hdr
+ * and indirect ring elements
+ */
+ size = vq->vq_nentries * sizeof(struct virtio_tx_region);
+ hdr_mz = &vq->txq.hdr_mz;
+ hdr_mem = &vq->txq.hdr_mem;
+ break;
+ case VTNET_CQ:
+ /* Allocate a page for control vq command, data and status */
+ size = rte_mem_page_size();
+ hdr_mz = &vq->cq.hdr_mz;
+ hdr_mem = &vq->cq.hdr_mem;
+ break;
+ case VTNET_RQ:
+ /* fallthrough */
+ default:
+ return 0;
+ }
+
+ snprintf(hdr_name, sizeof(hdr_name), "%s_hdr", name);
+ *hdr_mz = rte_memzone_reserve_aligned(hdr_name, size, numa_node,
+ RTE_MEMZONE_IOVA_CONTIG, RTE_CACHE_LINE_SIZE);
+ if (*hdr_mz == NULL) {
+ if (rte_errno == EEXIST)
+ *hdr_mz = rte_memzone_lookup(hdr_name);
+ if (*hdr_mz == NULL)
+ return -ENOMEM;
+ }
+
+ memset((*hdr_mz)->addr, 0, size);
+
+ if (vq->hw->use_va)
+ *hdr_mem = (uintptr_t)(*hdr_mz)->addr;
+ else
+ *hdr_mem = (uintptr_t)(*hdr_mz)->iova;
+
+ return 0;
+}
+
+static void
+virtio_free_queue_headers(struct virtqueue *vq)
+{
+ const struct rte_memzone **hdr_mz;
+ rte_iova_t *hdr_mem;
+ int queue_type;
+
+ queue_type = virtio_get_queue_type(vq->hw, vq->vq_queue_index);
+ switch (queue_type) {
+ case VTNET_TQ:
+ hdr_mz = &vq->txq.hdr_mz;
+ hdr_mem = &vq->txq.hdr_mem;
+ break;
+ case VTNET_CQ:
+ hdr_mz = &vq->cq.hdr_mz;
+ hdr_mem = &vq->cq.hdr_mem;
+ break;
+ case VTNET_RQ:
+ /* fallthrough */
+ default:
+ return;
+ }
+
+ rte_memzone_free(*hdr_mz);
+ *hdr_mz = NULL;
+ *hdr_mem = 0;
+}
+
static int
virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
{
char vq_name[VIRTQUEUE_MAX_NAME_SZ];
- char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
- const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
+ const struct rte_memzone *mz = NULL;
unsigned int vq_size, size;
struct virtio_hw *hw = dev->data->dev_private;
struct virtnet_rx *rxvq = NULL;
struct virtnet_tx *txvq = NULL;
struct virtnet_ctl *cvq = NULL;
struct virtqueue *vq;
- size_t sz_hdr_mz = 0;
void *sw_ring = NULL;
int queue_type = virtio_get_queue_type(hw, queue_idx);
int ret;
@@ -297,22 +375,12 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
return -EINVAL;
}
- snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
- dev->data->port_id, queue_idx);
+ snprintf(vq_name, sizeof(vq_name), "port%d_vq%d", dev->data->port_id, queue_idx);
size = RTE_ALIGN_CEIL(sizeof(*vq) +
vq_size * sizeof(struct vq_desc_extra),
RTE_CACHE_LINE_SIZE);
- if (queue_type == VTNET_TQ) {
- /*
- * For each xmit packet, allocate a virtio_net_hdr
- * and indirect ring elements
- */
- sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
- } else if (queue_type == VTNET_CQ) {
- /* Allocate a page for control vq command, data and status */
- sz_hdr_mz = rte_mem_page_size();
- }
+
vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
numa_node);
@@ -366,20 +434,10 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
virtio_init_vring(vq);
- if (sz_hdr_mz) {
- snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
- dev->data->port_id, queue_idx);
- hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
- numa_node, RTE_MEMZONE_IOVA_CONTIG,
- RTE_CACHE_LINE_SIZE);
- if (hdr_mz == NULL) {
- if (rte_errno == EEXIST)
- hdr_mz = rte_memzone_lookup(vq_hdr_name);
- if (hdr_mz == NULL) {
- ret = -ENOMEM;
- goto free_mz;
- }
- }
+ ret = virtio_alloc_queue_headers(vq, numa_node, vq_name);
+ if (ret) {
+ PMD_INIT_LOG(ERR, "Failed to alloc queue headers");
+ goto free_mz;
}
if (queue_type == VTNET_RQ) {
@@ -411,21 +469,9 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
txvq = &vq->txq;
txvq->port_id = dev->data->port_id;
txvq->mz = mz;
- txvq->virtio_net_hdr_mz = hdr_mz;
- if (hw->use_va)
- txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
- else
- txvq->virtio_net_hdr_mem = hdr_mz->iova;
} else if (queue_type == VTNET_CQ) {
cvq = &vq->cq;
cvq->mz = mz;
- cvq->virtio_net_hdr_mz = hdr_mz;
- if (hw->use_va)
- cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
- else
- cvq->virtio_net_hdr_mem = hdr_mz->iova;
- memset(cvq->virtio_net_hdr_mz->addr, 0, rte_mem_page_size());
-
hw->cvq = cvq;
vq->cq.notify_queue = &virtio_control_queue_notify;
}
@@ -439,18 +485,15 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
struct virtio_tx_region *txr;
unsigned int i;
- txr = hdr_mz->addr;
- memset(txr, 0, vq_size * sizeof(*txr));
+ txr = txvq->hdr_mz->addr;
for (i = 0; i < vq_size; i++) {
/* first indirect descriptor is always the tx header */
if (!virtio_with_packed_queue(hw)) {
struct vring_desc *start_dp = txr[i].tx_indir;
vring_desc_init_split(start_dp,
RTE_DIM(txr[i].tx_indir));
- start_dp->addr = txvq->virtio_net_hdr_mem
- + i * sizeof(*txr)
- + offsetof(struct virtio_tx_region,
- tx_hdr);
+ start_dp->addr = txvq->hdr_mem + i * sizeof(*txr)
+ + offsetof(struct virtio_tx_region, tx_hdr);
start_dp->len = hw->vtnet_hdr_size;
start_dp->flags = VRING_DESC_F_NEXT;
} else {
@@ -458,10 +501,8 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
txr[i].tx_packed_indir;
vring_desc_init_indirect_packed(start_dp,
RTE_DIM(txr[i].tx_packed_indir));
- start_dp->addr = txvq->virtio_net_hdr_mem
- + i * sizeof(*txr)
- + offsetof(struct virtio_tx_region,
- tx_hdr);
+ start_dp->addr = txvq->hdr_mem + i * sizeof(*txr)
+ + offsetof(struct virtio_tx_region, tx_hdr);
start_dp->len = hw->vtnet_hdr_size;
}
}
@@ -481,7 +522,7 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t queue_idx)
free_sw_ring:
rte_free(sw_ring);
free_hdr_mz:
- rte_memzone_free(hdr_mz);
+ virtio_free_queue_headers(vq);
free_mz:
rte_memzone_free(mz);
free_vq:
@@ -514,12 +555,12 @@ virtio_free_queues(struct virtio_hw *hw)
rte_memzone_free(vq->rxq.mz);
} else if (queue_type == VTNET_TQ) {
rte_memzone_free(vq->txq.mz);
- rte_memzone_free(vq->txq.virtio_net_hdr_mz);
} else {
rte_memzone_free(vq->cq.mz);
- rte_memzone_free(vq->cq.virtio_net_hdr_mz);
}
+ virtio_free_queue_headers(vq);
+
rte_free(vq);
hw->vqs[i] = NULL;
}
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index d9d40832e0..bd95e8ceb5 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -542,7 +542,7 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
uint16_t needed, int use_indirect, int can_push,
int in_order)
{
- struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
+ struct virtio_tx_region *txr = txvq->hdr_mz->addr;
struct vq_desc_extra *dxp;
struct virtqueue *vq = virtnet_txq_to_vq(txvq);
struct vring_desc *start_dp;
@@ -579,9 +579,8 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
* 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_indir, txr);
- start_dp[idx].len = (seg_num + 1) * sizeof(struct vring_desc);
+ start_dp[idx].addr = txvq->hdr_mem + RTE_PTR_DIFF(&txr[idx].tx_indir, txr);
+ start_dp[idx].len = (seg_num + 1) * sizeof(struct vring_desc);
start_dp[idx].flags = VRING_DESC_F_INDIRECT;
hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
@@ -592,9 +591,8 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
/* setup first tx ring slot to point to header
* stored in reserved region.
*/
- start_dp[idx].addr = txvq->virtio_net_hdr_mem +
- RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
- start_dp[idx].len = vq->hw->vtnet_hdr_size;
+ start_dp[idx].addr = txvq->hdr_mem + RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
+ start_dp[idx].len = vq->hw->vtnet_hdr_size;
start_dp[idx].flags = VRING_DESC_F_NEXT;
hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
diff --git a/drivers/net/virtio/virtio_rxtx.h b/drivers/net/virtio/virtio_rxtx.h
index 6ee3a13100..226c722d64 100644
--- a/drivers/net/virtio/virtio_rxtx.h
+++ b/drivers/net/virtio/virtio_rxtx.h
@@ -33,15 +33,13 @@ struct virtnet_rx {
};
struct virtnet_tx {
- /**< memzone to populate hdr. */
- const struct rte_memzone *virtio_net_hdr_mz;
- rte_iova_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
+ const struct rte_memzone *hdr_mz; /**< memzone to populate hdr. */
+ rte_iova_t hdr_mem; /**< hdr for each xmit packet */
- uint16_t queue_id; /**< DPDK queue index. */
- uint16_t port_id; /**< Device port identifier. */
+ uint16_t queue_id; /**< DPDK queue index. */
+ uint16_t port_id; /**< Device port identifier. */
- /* Statistics */
- struct virtnet_stats stats;
+ struct virtnet_stats stats; /* Statistics */
const struct rte_memzone *mz; /**< mem zone to populate TX ring. */
};
diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index c98d696e62..3b174a5923 100644
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -200,10 +200,9 @@ virtqueue_txvq_reset_packed(struct virtqueue *vq)
vq->vq_packed.event_flags_shadow = 0;
txvq = &vq->txq;
- txr = txvq->virtio_net_hdr_mz->addr;
+ txr = txvq->hdr_mz->addr;
memset(txvq->mz->addr, 0, txvq->mz->len);
- memset(txvq->virtio_net_hdr_mz->addr, 0,
- txvq->virtio_net_hdr_mz->len);
+ memset(txvq->hdr_mz->addr, 0, txvq->hdr_mz->len);
for (desc_idx = 0; desc_idx < vq->vq_nentries; desc_idx++) {
dxp = &vq->vq_descx[desc_idx];
@@ -217,8 +216,7 @@ virtqueue_txvq_reset_packed(struct virtqueue *vq)
start_dp = txr[desc_idx].tx_packed_indir;
vring_desc_init_indirect_packed(start_dp,
RTE_DIM(txr[desc_idx].tx_packed_indir));
- start_dp->addr = txvq->virtio_net_hdr_mem
- + desc_idx * sizeof(*txr)
+ start_dp->addr = txvq->hdr_mem + desc_idx * sizeof(*txr)
+ offsetof(struct virtio_tx_region, tx_hdr);
start_dp->len = vq->hw->vtnet_hdr_size;
}
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 62f472850e..f5058f362c 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h
@@ -604,7 +604,7 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
uint16_t needed, int use_indirect, int can_push,
int in_order)
{
- struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
+ struct virtio_tx_region *txr = txvq->hdr_mz->addr;
struct vq_desc_extra *dxp;
struct virtqueue *vq = virtnet_txq_to_vq(txvq);
struct vring_packed_desc *start_dp, *head_dp;
@@ -646,10 +646,8 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
* 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);
+ start_dp[idx].addr = txvq->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;
@@ -665,9 +663,8 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
/* setup first tx ring slot to point to header
* stored in reserved region.
*/
- start_dp[idx].addr = txvq->virtio_net_hdr_mem +
- RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
- start_dp[idx].len = vq->hw->vtnet_hdr_size;
+ start_dp[idx].addr = txvq->hdr_mem + RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
+ start_dp[idx].len = vq->hw->vtnet_hdr_size;
hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
idx++;
if (idx >= vq->vq_nentries) {
--
2.38.1