#include <rte_kvargs.h>
#include <rte_bus_vdev.h>
#include <rte_string_fns.h>
+#include <rte_errno.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_eal_memconfig.h>
#include "rte_eth_memif.h"
#include "memif_socket.h"
NULL
};
+static const struct rte_eth_link pmd_link = {
+ .link_speed = ETH_SPEED_NUM_10G,
+ .link_duplex = ETH_LINK_FULL_DUPLEX,
+ .link_status = ETH_LINK_DOWN,
+ .link_autoneg = ETH_LINK_AUTONEG
+};
+
#define MEMIF_MP_SEND_REGION "memif_mp_send_region"
+
+static int memif_region_init_zc(const struct rte_memseg_list *msl,
+ const struct rte_memseg *ms, void *arg);
+
const char *
memif_version(void)
{
struct mp_region_msg *reply_param;
struct memif_region *r;
struct pmd_process_private *proc_private = dev->process_private;
+ struct pmd_internals *pmd = dev->data->dev_private;
+ /* in case of zero-copy slave, only request region 0 */
+ uint16_t max_region_num = (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) ?
+ 1 : ETH_MEMIF_MAX_REGION_NUM;
MIF_LOG(DEBUG, "Requesting memory regions");
- for (i = 0; i < ETH_MEMIF_MAX_REGION_NUM; i++) {
+ for (i = 0; i < max_region_num; i++) {
/* Prepare the message */
memset(&msg, 0, sizeof(msg));
strlcpy(msg.name, MEMIF_MP_SEND_REGION, sizeof(msg.name));
free(reply);
}
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
+ ret = rte_memseg_walk(memif_region_init_zc, (void *)proc_private);
+ if (ret < 0)
+ return ret;
+ }
+
return memif_connect(dev);
}
return ((uint8_t *)proc_private->regions[d->region]->addr + d->offset);
}
+/* Free mbufs received by master */
+static void
+memif_free_stored_mbufs(struct pmd_process_private *proc_private, struct memif_queue *mq)
+{
+ uint16_t mask = (1 << mq->log2_ring_size) - 1;
+ memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
+
+ /* FIXME: improve performance */
+ while (mq->last_tail != ring->tail) {
+ RTE_MBUF_PREFETCH_TO_FREE(mq->buffers[(mq->last_tail + 1) & mask]);
+ /* Decrement refcnt and free mbuf. (current segment) */
+ rte_mbuf_refcnt_update(mq->buffers[mq->last_tail & mask], -1);
+ rte_pktmbuf_free_seg(mq->buffers[mq->last_tail & mask]);
+ mq->last_tail++;
+ }
+}
+
static int
memif_pktmbuf_chain(struct rte_mbuf *head, struct rte_mbuf *cur_tail,
struct rte_mbuf *tail)
rte_pktmbuf_pkt_len(mbuf_head) += cp_len;
memcpy(rte_pktmbuf_mtod_offset(mbuf, void *, dst_off),
- (uint8_t *)memif_get_buffer(proc_private, d0) +
- src_off, cp_len);
+ (uint8_t *)memif_get_buffer(proc_private, d0) + src_off,
+ cp_len);
src_off += cp_len;
dst_off += cp_len;
return n_rx_pkts;
}
+static uint16_t
+eth_memif_rx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+ struct memif_queue *mq = queue;
+ struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
+ struct pmd_process_private *proc_private =
+ rte_eth_devices[mq->in_port].process_private;
+ memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
+ uint16_t cur_slot, last_slot, n_slots, ring_size, mask, s0, head;
+ uint16_t n_rx_pkts = 0;
+ memif_desc_t *d0;
+ struct rte_mbuf *mbuf, *mbuf_tail;
+ struct rte_mbuf *mbuf_head = NULL;
+ int ret;
+ struct rte_eth_link link;
+
+ if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
+ return 0;
+ if (unlikely(ring == NULL)) {
+ /* Secondary process will attempt to request regions. */
+ rte_eth_link_get(mq->in_port, &link);
+ return 0;
+ }
+
+ /* consume interrupt */
+ if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
+ uint64_t b;
+ ssize_t size __rte_unused;
+ size = read(mq->intr_handle.fd, &b, sizeof(b));
+ }
+
+ ring_size = 1 << mq->log2_ring_size;
+ mask = ring_size - 1;
+
+ cur_slot = mq->last_tail;
+ last_slot = ring->tail;
+ if (cur_slot == last_slot)
+ goto refill;
+ n_slots = last_slot - cur_slot;
+
+ while (n_slots && n_rx_pkts < nb_pkts) {
+ s0 = cur_slot & mask;
+
+ d0 = &ring->desc[s0];
+ mbuf_head = mq->buffers[s0];
+ mbuf = mbuf_head;
+
+next_slot:
+ /* prefetch next descriptor */
+ if (n_rx_pkts + 1 < nb_pkts)
+ rte_prefetch0(&ring->desc[(cur_slot + 1) & mask]);
+
+ mbuf->port = mq->in_port;
+ rte_pktmbuf_data_len(mbuf) = d0->length;
+ rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf);
+
+ mq->n_bytes += rte_pktmbuf_data_len(mbuf);
+
+ cur_slot++;
+ n_slots--;
+ if (d0->flags & MEMIF_DESC_FLAG_NEXT) {
+ s0 = cur_slot & mask;
+ d0 = &ring->desc[s0];
+ mbuf_tail = mbuf;
+ mbuf = mq->buffers[s0];
+ ret = memif_pktmbuf_chain(mbuf_head, mbuf_tail, mbuf);
+ if (unlikely(ret < 0)) {
+ MIF_LOG(ERR, "number-of-segments-overflow");
+ goto refill;
+ }
+ goto next_slot;
+ }
+
+ *bufs++ = mbuf_head;
+ n_rx_pkts++;
+ }
+
+ mq->last_tail = cur_slot;
+
+/* Supply master with new buffers */
+refill:
+ head = ring->head;
+ n_slots = ring_size - head + mq->last_tail;
+
+ if (n_slots < 32)
+ goto no_free_mbufs;
+
+ ret = rte_pktmbuf_alloc_bulk(mq->mempool, &mq->buffers[head & mask], n_slots);
+ if (unlikely(ret < 0))
+ goto no_free_mbufs;
+
+ while (n_slots--) {
+ s0 = head++ & mask;
+ if (n_slots > 0)
+ rte_prefetch0(mq->buffers[head & mask]);
+ d0 = &ring->desc[s0];
+ /* store buffer header */
+ mbuf = mq->buffers[s0];
+ /* populate descriptor */
+ d0->length = rte_pktmbuf_data_room_size(mq->mempool) -
+ RTE_PKTMBUF_HEADROOM;
+ d0->region = 1;
+ d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
+ (uint8_t *)proc_private->regions[d0->region]->addr;
+ }
+no_free_mbufs:
+ rte_mb();
+ ring->head = head;
+
+ mq->n_pkts += n_rx_pkts;
+
+ return n_rx_pkts;
+}
+
static uint16_t
eth_memif_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
return n_tx_pkts;
}
+
+static int
+memif_tx_one_zc(struct pmd_process_private *proc_private, struct memif_queue *mq,
+ memif_ring_t *ring, struct rte_mbuf *mbuf, const uint16_t mask,
+ uint16_t slot, uint16_t n_free)
+{
+ memif_desc_t *d0;
+ int used_slots = 1;
+
+next_in_chain:
+ /* store pointer to mbuf to free it later */
+ mq->buffers[slot & mask] = mbuf;
+ /* Increment refcnt to make sure the buffer is not freed before master
+ * receives it. (current segment)
+ */
+ rte_mbuf_refcnt_update(mbuf, 1);
+ /* populate descriptor */
+ d0 = &ring->desc[slot & mask];
+ d0->length = rte_pktmbuf_data_len(mbuf);
+ /* FIXME: get region index */
+ d0->region = 1;
+ d0->offset = rte_pktmbuf_mtod(mbuf, uint8_t *) -
+ (uint8_t *)proc_private->regions[d0->region]->addr;
+ d0->flags = 0;
+
+ /* check if buffer is chained */
+ if (rte_pktmbuf_is_contiguous(mbuf) == 0) {
+ if (n_free < 2)
+ return 0;
+ /* mark buffer as chained */
+ d0->flags |= MEMIF_DESC_FLAG_NEXT;
+ /* advance mbuf */
+ mbuf = mbuf->next;
+ /* update counters */
+ used_slots++;
+ slot++;
+ n_free--;
+ goto next_in_chain;
+ }
+ return used_slots;
+}
+
+static uint16_t
+eth_memif_tx_zc(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
+{
+ struct memif_queue *mq = queue;
+ struct pmd_internals *pmd = rte_eth_devices[mq->in_port].data->dev_private;
+ struct pmd_process_private *proc_private =
+ rte_eth_devices[mq->in_port].process_private;
+ memif_ring_t *ring = memif_get_ring_from_queue(proc_private, mq);
+ uint16_t slot, n_free, ring_size, mask, n_tx_pkts = 0;
+ memif_ring_type_t type = mq->type;
+ struct rte_eth_link link;
+
+ if (unlikely((pmd->flags & ETH_MEMIF_FLAG_CONNECTED) == 0))
+ return 0;
+ if (unlikely(ring == NULL)) {
+ /* Secondary process will attempt to request regions. */
+ rte_eth_link_get(mq->in_port, &link);
+ return 0;
+ }
+
+ ring_size = 1 << mq->log2_ring_size;
+ mask = ring_size - 1;
+
+ /* free mbufs received by master */
+ memif_free_stored_mbufs(proc_private, mq);
+
+ /* ring type always MEMIF_RING_S2M */
+ slot = ring->head;
+ n_free = ring_size - ring->head + mq->last_tail;
+
+ int used_slots;
+
+ while (n_free && (n_tx_pkts < nb_pkts)) {
+ while ((n_free > 4) && ((nb_pkts - n_tx_pkts) > 4)) {
+ if ((nb_pkts - n_tx_pkts) > 8) {
+ rte_prefetch0(*bufs + 4);
+ rte_prefetch0(*bufs + 5);
+ rte_prefetch0(*bufs + 6);
+ rte_prefetch0(*bufs + 7);
+ }
+ used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
+ mask, slot, n_free);
+ if (unlikely(used_slots < 1))
+ goto no_free_slots;
+ n_tx_pkts++;
+ slot += used_slots;
+ n_free -= used_slots;
+
+ used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
+ mask, slot, n_free);
+ if (unlikely(used_slots < 1))
+ goto no_free_slots;
+ n_tx_pkts++;
+ slot += used_slots;
+ n_free -= used_slots;
+
+ used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
+ mask, slot, n_free);
+ if (unlikely(used_slots < 1))
+ goto no_free_slots;
+ n_tx_pkts++;
+ slot += used_slots;
+ n_free -= used_slots;
+
+ used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
+ mask, slot, n_free);
+ if (unlikely(used_slots < 1))
+ goto no_free_slots;
+ n_tx_pkts++;
+ slot += used_slots;
+ n_free -= used_slots;
+ }
+ used_slots = memif_tx_one_zc(proc_private, mq, ring, *bufs++,
+ mask, slot, n_free);
+ if (unlikely(used_slots < 1))
+ goto no_free_slots;
+ n_tx_pkts++;
+ slot += used_slots;
+ n_free -= used_slots;
+ }
+
+no_free_slots:
+ rte_mb();
+ /* update ring pointers */
+ if (type == MEMIF_RING_S2M)
+ ring->head = slot;
+ else
+ ring->tail = slot;
+
+ /* Send interrupt, if enabled. */
+ if ((ring->flags & MEMIF_RING_FLAG_MASK_INT) == 0) {
+ uint64_t a = 1;
+ ssize_t size = write(mq->intr_handle.fd, &a, sizeof(a));
+ if (unlikely(size < 0)) {
+ MIF_LOG(WARNING,
+ "Failed to send interrupt. %s", strerror(errno));
+ }
+ }
+
+ /* increment queue counters */
+ mq->n_pkts += n_tx_pkts;
+
+ return n_tx_pkts;
+}
+
void
-memif_free_regions(struct pmd_process_private *proc_private)
+memif_free_regions(struct rte_eth_dev *dev)
{
+ struct pmd_process_private *proc_private = dev->process_private;
+ struct pmd_internals *pmd = dev->data->dev_private;
int i;
struct memif_region *r;
- MIF_LOG(DEBUG, "Free memory regions");
/* regions are allocated contiguously, so it's
* enough to loop until 'proc_private->regions_num'
*/
for (i = 0; i < proc_private->regions_num; i++) {
r = proc_private->regions[i];
if (r != NULL) {
+ /* This is memzone */
+ if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
+ r->addr = NULL;
+ if (r->fd > 0)
+ close(r->fd);
+ }
if (r->addr != NULL) {
munmap(r->addr, r->region_size);
if (r->fd > 0) {
proc_private->regions_num = 0;
}
+static int
+memif_region_init_zc(const struct rte_memseg_list *msl, const struct rte_memseg *ms,
+ void *arg)
+{
+ struct pmd_process_private *proc_private = (struct pmd_process_private *)arg;
+ struct memif_region *r;
+
+ if (proc_private->regions_num < 1) {
+ MIF_LOG(ERR, "Missing descriptor region");
+ return -1;
+ }
+
+ r = proc_private->regions[proc_private->regions_num - 1];
+
+ if (r->addr != msl->base_va)
+ r = proc_private->regions[++proc_private->regions_num - 1];
+
+ if (r == NULL) {
+ r = rte_zmalloc("region", sizeof(struct memif_region), 0);
+ if (r == NULL) {
+ MIF_LOG(ERR, "Failed to alloc memif region.");
+ return -ENOMEM;
+ }
+
+ r->addr = msl->base_va;
+ r->region_size = ms->len;
+ r->fd = rte_memseg_get_fd(ms);
+ if (r->fd < 0)
+ return -1;
+ r->pkt_buffer_offset = 0;
+
+ proc_private->regions[proc_private->regions_num - 1] = r;
+ } else {
+ r->region_size += ms->len;
+ }
+
+ return 0;
+}
+
static int
memif_region_init_shm(struct rte_eth_dev *dev, uint8_t has_buffers)
{
static int
memif_regions_init(struct rte_eth_dev *dev)
{
+ struct pmd_internals *pmd = dev->data->dev_private;
int ret;
- /* create one buffer region */
- ret = memif_region_init_shm(dev, /* has buffer */ 1);
- if (ret < 0)
- return ret;
+ /*
+ * Zero-copy exposes dpdk memory.
+ * Each memseg list will be represented by memif region.
+ * Zero-copy regions indexing: memseg list idx + 1,
+ * as we already have region 0 reserved for descriptors.
+ */
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
+ /* create region idx 0 containing descriptors */
+ ret = memif_region_init_shm(dev, 0);
+ if (ret < 0)
+ return ret;
+ ret = rte_memseg_walk(memif_region_init_zc, (void *)dev->process_private);
+ if (ret < 0)
+ return ret;
+ } else {
+ /* create one memory region contaning rings and buffers */
+ ret = memif_region_init_shm(dev, /* has buffers */ 1);
+ if (ret < 0)
+ return ret;
+ }
return 0;
}
__atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
ring->cookie = MEMIF_COOKIE;
ring->flags = 0;
+
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
+ continue;
+
for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
slot = i * (1 << pmd->run.log2_ring_size) + j;
ring->desc[j].region = 0;
__atomic_store_n(&ring->tail, 0, __ATOMIC_RELAXED);
ring->cookie = MEMIF_COOKIE;
ring->flags = 0;
+
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)
+ continue;
+
for (j = 0; j < (1 << pmd->run.log2_ring_size); j++) {
slot = (i + pmd->run.num_s2m_rings) *
(1 << pmd->run.log2_ring_size) + j;
}
/* called only by slave */
-static void
+static int
memif_init_queues(struct rte_eth_dev *dev)
{
struct pmd_internals *pmd = dev->data->dev_private;
"Failed to create eventfd for tx queue %d: %s.", i,
strerror(errno));
}
+ mq->buffers = NULL;
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
+ mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
+ (1 << mq->log2_ring_size), 0);
+ if (mq->buffers == NULL)
+ return -ENOMEM;
+ }
}
for (i = 0; i < pmd->run.num_m2s_rings; i++) {
"Failed to create eventfd for rx queue %d: %s.", i,
strerror(errno));
}
+ mq->buffers = NULL;
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
+ mq->buffers = rte_zmalloc("bufs", sizeof(struct rte_mbuf *) *
+ (1 << mq->log2_ring_size), 0);
+ if (mq->buffers == NULL)
+ return -ENOMEM;
+ }
}
+ return 0;
}
int
memif_init_rings(dev);
- memif_init_queues(dev);
+ ret = memif_init_queues(dev);
+ if (ret < 0)
+ return ret;
return 0;
}
mr->addr = mmap(NULL, mr->region_size,
PROT_READ | PROT_WRITE,
MAP_SHARED, mr->fd, 0);
- if (mr->addr == NULL)
+ if (mr->addr == MAP_FAILED) {
+ MIF_LOG(ERR, "mmap failed: %s\n",
+ strerror(errno));
return -1;
+ }
+ }
+ if (i > 0 && (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY)) {
+ /* close memseg file */
+ close(mr->fd);
+ mr->fd = -1;
}
}
}
ret = memif_connect_master(dev);
break;
default:
- MIF_LOG(ERR, "%s: Unknown role: %d.",
- rte_vdev_device_name(pmd->vdev), pmd->role);
+ MIF_LOG(ERR, "Unknown role: %d.", pmd->role);
ret = -1;
break;
}
mq = rte_zmalloc("tx-queue", sizeof(struct memif_queue), 0);
if (mq == NULL) {
- MIF_LOG(ERR, "%s: Failed to allocate tx queue id: %u",
- rte_vdev_device_name(pmd->vdev), qid);
+ MIF_LOG(ERR, "Failed to allocate tx queue id: %u", qid);
return -ENOMEM;
}
mq->n_bytes = 0;
mq->intr_handle.fd = -1;
mq->intr_handle.type = RTE_INTR_HANDLE_EXT;
+ mq->in_port = dev->data->port_id;
dev->data->tx_queues[qid] = mq;
return 0;
mq = rte_zmalloc("rx-queue", sizeof(struct memif_queue), 0);
if (mq == NULL) {
- MIF_LOG(ERR, "%s: Failed to allocate rx queue id: %u",
- rte_vdev_device_name(pmd->vdev), qid);
+ MIF_LOG(ERR, "Failed to allocate rx queue id: %u", qid);
return -ENOMEM;
}
memif_mp_request_regions(dev);
} else if (dev->data->dev_link.link_status == ETH_LINK_DOWN &&
proc_private->regions_num > 0) {
- memif_free_regions(proc_private);
+ memif_free_regions(dev);
}
}
return 0;
const unsigned int numa_node = vdev->device.numa_node;
const char *name = rte_vdev_device_name(vdev);
- if (flags & ETH_MEMIF_FLAG_ZERO_COPY) {
- MIF_LOG(ERR, "Zero-copy slave not supported.");
- return -1;
- }
-
eth_dev = rte_eth_vdev_allocate(vdev, sizeof(*pmd));
if (eth_dev == NULL) {
MIF_LOG(ERR, "%s: Unable to allocate device struct.", name);
pmd->flags = flags;
pmd->flags |= ETH_MEMIF_FLAG_DISABLED;
pmd->role = role;
+ /* Zero-copy flag irelevant to master. */
+ if (pmd->role == MEMIF_ROLE_MASTER)
+ pmd->flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
ret = memif_socket_init(eth_dev, socket_filename);
if (ret < 0)
data = eth_dev->data;
data->dev_private = pmd;
data->numa_node = numa_node;
+ data->dev_link = pmd_link;
data->mac_addrs = ether_addr;
eth_dev->dev_ops = &ops;
eth_dev->device = &vdev->device;
- eth_dev->rx_pkt_burst = eth_memif_rx;
- eth_dev->tx_pkt_burst = eth_memif_tx;
+ if (pmd->flags & ETH_MEMIF_FLAG_ZERO_COPY) {
+ eth_dev->rx_pkt_burst = eth_memif_rx_zc;
+ eth_dev->tx_pkt_burst = eth_memif_tx_zc;
+ } else {
+ eth_dev->rx_pkt_burst = eth_memif_rx;
+ eth_dev->tx_pkt_burst = eth_memif_tx;
+ }
+
eth_dev->data->dev_flags &= RTE_ETH_DEV_CLOSE_REMOVE;
uint32_t *flags = (uint32_t *)extra_args;
if (strstr(value, "yes") != NULL) {
+ if (!rte_mcfg_get_single_file_segments()) {
+ MIF_LOG(ERR, "Zero-copy doesn't support multi-file segments.");
+ return -ENOTSUP;
+ }
*flags |= ETH_MEMIF_FLAG_ZERO_COPY;
} else if (strstr(value, "no") != NULL) {
*flags &= ~ETH_MEMIF_FLAG_ZERO_COPY;
uint32_t idx;
int ret = 0;
+ if (strlen(filename) >= MEMIF_SOCKET_UN_SIZE) {
+ MIF_LOG(ERR, "Unix socket address too long (max 108).");
+ return -1;
+ }
+
tmp = strrchr(filename, '/');
if (tmp != NULL) {
idx = tmp - filename;
git.droids-corp.org / dpdk.git / blobdiff