* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
-#include <dirent.h>
-#include <fuse/cuse_lowlevel.h>
#include <linux/vhost.h>
#include <linux/virtio_net.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
-#include <sys/eventfd.h>
-#include <sys/ioctl.h>
+#include <assert.h>
#include <sys/mman.h>
#include <unistd.h>
+#ifdef RTE_LIBRTE_VHOST_NUMA
+#include <numaif.h>
+#endif
+
+#include <sys/socket.h>
#include <rte_ethdev.h>
#include <rte_log.h>
#include <rte_string_fns.h>
#include <rte_memory.h>
+#include <rte_malloc.h>
+#include <rte_virtio_net.h>
-#include "main.h"
+#include "vhost-net.h"
#include "virtio-net.h"
-#include "vhost-net-cdev.h"
-#include "eventfd_link/eventfd_link.h"
-
-const char eventfd_cdev[] = "/dev/eventfd-link";
-
-extern uint32_t num_devices;
-static uint32_t num_cur_devices = 0;
-/* device ops to add/remove device to data core. */
-static struct virtio_net_device_ops const * notify_ops;
-/* Root address of the linked list in the configuration core. */
-static struct virtio_net_config_ll *ll_root = NULL;
+/*
+ * Device linked list structure for configuration.
+ */
+struct virtio_net_config_ll {
+ struct virtio_net dev; /* Virtio device.*/
+ struct virtio_net_config_ll *next; /* Next dev on linked list.*/
+};
-/* Features supported by this application. RX merge buffers are disabled by default. */
-uint64_t VHOST_FEATURES = (0ULL << VIRTIO_NET_F_MRG_RXBUF);
+/* device ops to add/remove device to/from data core. */
+struct virtio_net_device_ops const *notify_ops;
+/* root address of the linked list of managed virtio devices */
+static struct virtio_net_config_ll *ll_root;
-/* Line size for reading maps file. */
-const uint32_t BUFSIZE = PATH_MAX;
+#define VHOST_USER_F_PROTOCOL_FEATURES 30
-/* Size of prot char array in procmap. */
-#define PROT_SZ 5
+/* Features supported by this lib. */
+#define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
+ (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
+ (1ULL << VIRTIO_NET_F_CTRL_RX) | \
+ (1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE) | \
+ (VHOST_SUPPORTS_MQ) | \
+ (1ULL << VIRTIO_F_VERSION_1) | \
+ (1ULL << VHOST_F_LOG_ALL) | \
+ (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
+ (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
+ (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
+ (1ULL << VIRTIO_NET_F_CSUM) | \
+ (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
+ (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
+ (1ULL << VIRTIO_NET_F_GUEST_TSO6))
-/* Number of elements in procmap struct. */
-#define PROCMAP_SZ 8
+static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
-/* Structure containing information gathered from maps file. */
-struct procmap
-{
- uint64_t va_start; /* Start virtual address in file. */
- uint64_t len; /* Size of file. */
- uint64_t pgoff; /* Not used. */
- uint32_t maj; /* Not used. */
- uint32_t min; /* Not used. */
- uint32_t ino; /* Not used. */
- char prot[PROT_SZ]; /* Not used. */
- char fname[PATH_MAX]; /* File name. */
-};
/*
- * Converts QEMU virtual address to Vhost virtual address. This function is used
- * to convert the ring addresses to our address space.
+ * Converts QEMU virtual address to Vhost virtual address. This function is
+ * used to convert the ring addresses to our address space.
*/
static uint64_t
qva_to_vva(struct virtio_net *dev, uint64_t qemu_va)
for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
region = &dev->mem->regions[regionidx];
if ((qemu_va >= region->userspace_address) &&
- (qemu_va <= region->userspace_address +
- region->memory_size)) {
- vhost_va = dev->mem->mapped_address + qemu_va - dev->mem->base_address;
+ (qemu_va <= region->userspace_address +
+ region->memory_size)) {
+ vhost_va = qemu_va + region->guest_phys_address +
+ region->address_offset -
+ region->userspace_address;
break;
}
}
return vhost_va;
}
-/*
- * Locate the file containing QEMU's memory space and map it to our address space.
- */
-static int
-host_memory_map (struct virtio_net *dev, struct virtio_memory *mem, pid_t pid, uint64_t addr)
-{
- struct dirent *dptr = NULL;
- struct procmap procmap;
- DIR *dp = NULL;
- int fd;
- int i;
- char memfile[PATH_MAX];
- char mapfile[PATH_MAX];
- char procdir[PATH_MAX];
- char resolved_path[PATH_MAX];
- FILE *fmap;
- void *map;
- uint8_t found = 0;
- char line[BUFSIZE];
- char dlm[] = "- : ";
- char *str, *sp, *in[PROCMAP_SZ];
- char *end = NULL;
-
- /* Path where mem files are located. */
- snprintf (procdir, PATH_MAX, "/proc/%u/fd/", pid);
- /* Maps file used to locate mem file. */
- snprintf (mapfile, PATH_MAX, "/proc/%u/maps", pid);
-
- fmap = fopen(mapfile, "r");
- if (fmap == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to open maps file for pid %d\n", dev->device_fh, pid);
- return -1;
- }
-
- /* Read through maps file until we find out base_address. */
- while (fgets(line, BUFSIZE, fmap) != 0) {
- str = line;
- errno = 0;
- /* Split line in to fields. */
- for (i = 0; i < PROCMAP_SZ; i++) {
- if (((in[i] = strtok_r(str, &dlm[i], &sp)) == NULL) || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
- str = NULL;
- }
-
- /* Convert/Copy each field as needed. */
- procmap.va_start = strtoull(in[0], &end, 16);
- if ((in[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.len = strtoull(in[1], &end, 16);
- if ((in[1] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.pgoff = strtoull(in[3], &end, 16);
- if ((in[3] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.maj = strtoul(in[4], &end, 16);
- if ((in[4] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.min = strtoul(in[5], &end, 16);
- if ((in[5] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- procmap.ino = strtoul(in[6], &end, 16);
- if ((in[6] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) {
- fclose(fmap);
- return -1;
- }
-
- memcpy(&procmap.prot, in[2], PROT_SZ);
- memcpy(&procmap.fname, in[7], PATH_MAX);
-
- if (procmap.va_start == addr) {
- procmap.len = procmap.len - procmap.va_start;
- found = 1;
- break;
- }
- }
- fclose(fmap);
-
- if (!found) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find memory file in pid %d maps file\n", dev->device_fh, pid);
- return -1;
- }
-
- /* Find the guest memory file among the process fds. */
- dp = opendir(procdir);
- if (dp == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Cannot open pid %d process directory \n", dev->device_fh, pid);
- return -1;
-
- }
-
- found = 0;
-
- /* Read the fd directory contents. */
- while (NULL != (dptr = readdir(dp))) {
- snprintf (memfile, PATH_MAX, "/proc/%u/fd/%s", pid, dptr->d_name);
- realpath(memfile, resolved_path);
- if (resolved_path == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to resolve fd directory\n", dev->device_fh);
- closedir(dp);
- return -1;
- }
- if (strncmp(resolved_path, procmap.fname,
- strnlen(procmap.fname, PATH_MAX)) == 0) {
- found = 1;
- break;
- }
- }
-
- closedir(dp);
-
- if (found == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find memory file for pid %d\n", dev->device_fh, pid);
- return -1;
- }
- /* Open the shared memory file and map the memory into this process. */
- fd = open(memfile, O_RDWR);
-
- if (fd == -1) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to open %s for pid %d\n", dev->device_fh, memfile, pid);
- return -1;
- }
-
- map = mmap(0, (size_t)procmap.len, PROT_READ|PROT_WRITE , MAP_POPULATE|MAP_SHARED, fd, 0);
- close (fd);
-
- if (map == MAP_FAILED) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Error mapping the file %s for pid %d\n", dev->device_fh, memfile, pid);
- return -1;
- }
-
- /* Store the memory address and size in the device data structure */
- mem->mapped_address = (uint64_t)(uintptr_t)map;
- mem->mapped_size = procmap.len;
-
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mem File: %s->%s - Size: %llu - VA: %p\n", dev->device_fh,
- memfile, resolved_path, (long long unsigned)mem->mapped_size, map);
-
- return 0;
-}
/*
* Retrieves an entry from the devices configuration linked list.
}
/*
- * Searches the configuration core linked list and retrieves the device if it exists.
+ * Searches the configuration core linked list and
+ * retrieves the device if it exists.
*/
-static struct virtio_net *
+struct virtio_net *
get_device(struct vhost_device_ctx ctx)
{
struct virtio_net_config_ll *ll_dev;
ll_dev = get_config_ll_entry(ctx);
- /* If a matching entry is found in the linked list, return the device in that entry. */
- if (ll_dev) {
+ if (ll_dev)
return &ll_dev->dev;
- }
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Device not found in linked list.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Device not found in linked list.\n", ctx.fh);
return NULL;
}
/* If ll_dev == NULL then this is the first device so go to else */
if (ll_dev) {
/* If the 1st device_fh != 0 then we insert our device here. */
- if (ll_dev->dev.device_fh != 0) {
+ if (ll_dev->dev.device_fh != 0) {
new_ll_dev->dev.device_fh = 0;
new_ll_dev->next = ll_dev;
ll_root = new_ll_dev;
} else {
- /* Increment through the ll until we find un unused device_fh. Insert the device at that entry*/
- while ((ll_dev->next != NULL) && (ll_dev->dev.device_fh == (ll_dev->next->dev.device_fh - 1)))
+ /*
+ * Increment through the ll until we find un unused
+ * device_fh. Insert the device at that entry.
+ */
+ while ((ll_dev->next != NULL) &&
+ (ll_dev->dev.device_fh ==
+ (ll_dev->next->dev.device_fh - 1)))
ll_dev = ll_dev->next;
new_ll_dev->dev.device_fh = ll_dev->dev.device_fh + 1;
}
+static void
+cleanup_vq(struct vhost_virtqueue *vq, int destroy)
+{
+ if ((vq->callfd >= 0) && (destroy != 0))
+ close(vq->callfd);
+ if (vq->kickfd >= 0)
+ close(vq->kickfd);
+}
+
/*
- * Unmap any memory, close any file descriptors and free any memory owned by a device.
+ * Unmap any memory, close any file descriptors and
+ * free any memory owned by a device.
*/
static void
-cleanup_device(struct virtio_net *dev)
+cleanup_device(struct virtio_net *dev, int destroy)
{
- /* Unmap QEMU memory file if mapped. */
- if (dev->mem) {
- munmap((void*)(uintptr_t)dev->mem->mapped_address, (size_t)dev->mem->mapped_size);
- if (dev->mem->regions_hpa)
- free(dev->mem->regions_hpa);
- free(dev->mem);
- }
+ uint32_t i;
+
+ vhost_backend_cleanup(dev);
- /* Close any event notifiers opened by device. */
- if (dev->virtqueue[VIRTIO_RXQ]->callfd)
- close((int)dev->virtqueue[VIRTIO_RXQ]->callfd);
- if (dev->virtqueue[VIRTIO_RXQ]->kickfd)
- close((int)dev->virtqueue[VIRTIO_RXQ]->kickfd);
- if (dev->virtqueue[VIRTIO_TXQ]->callfd)
- close((int)dev->virtqueue[VIRTIO_TXQ]->callfd);
- if (dev->virtqueue[VIRTIO_TXQ]->kickfd)
- close((int)dev->virtqueue[VIRTIO_TXQ]->kickfd);
+ for (i = 0; i < dev->virt_qp_nb; i++) {
+ cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ], destroy);
+ cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ], destroy);
+ }
}
/*
static void
free_device(struct virtio_net_config_ll *ll_dev)
{
- /* Free any malloc'd memory */
- free(ll_dev->dev.virtqueue[VIRTIO_RXQ]);
- free(ll_dev->dev.virtqueue[VIRTIO_TXQ]);
- free(ll_dev);
+ uint32_t i;
+
+ for (i = 0; i < ll_dev->dev.virt_qp_nb; i++)
+ rte_free(ll_dev->dev.virtqueue[i * VIRTIO_QNUM]);
+
+ rte_free(ll_dev);
}
+
/*
* Remove an entry from the device configuration linked list.
*/
static struct virtio_net_config_ll *
-rm_config_ll_entry(struct virtio_net_config_ll *ll_dev, struct virtio_net_config_ll *ll_dev_last)
+rm_config_ll_entry(struct virtio_net_config_ll *ll_dev,
+ struct virtio_net_config_ll *ll_dev_last)
{
/* First remove the device and then clean it up. */
if (ll_dev == ll_root) {
ll_root = ll_dev->next;
- cleanup_device(&ll_dev->dev);
+ cleanup_device(&ll_dev->dev, 1);
free_device(ll_dev);
return ll_root;
} else {
if (likely(ll_dev_last != NULL)) {
ll_dev_last->next = ll_dev->next;
- cleanup_device(&ll_dev->dev);
+ cleanup_device(&ll_dev->dev, 1);
free_device(ll_dev);
return ll_dev_last->next;
} else {
- cleanup_device(&ll_dev->dev);
+ cleanup_device(&ll_dev->dev, 1);
free_device(ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "Remove entry from config_ll failed\n");
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Remove entry from config_ll failed\n");
return NULL;
}
}
}
+static void
+init_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
+{
+ memset(vq, 0, sizeof(struct vhost_virtqueue));
+
+ vq->kickfd = -1;
+ vq->callfd = -1;
+
+ /* Backends are set to -1 indicating an inactive device. */
+ vq->backend = -1;
+
+ /* always set the default vq pair to enabled */
+ if (qp_idx == 0)
+ vq->enabled = 1;
+}
+
+static void
+init_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
+{
+ uint32_t base_idx = qp_idx * VIRTIO_QNUM;
+
+ init_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
+ init_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
+}
+
+static void
+reset_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
+{
+ int callfd;
+
+ callfd = vq->callfd;
+ init_vring_queue(vq, qp_idx);
+ vq->callfd = callfd;
+}
+
+static void
+reset_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
+{
+ uint32_t base_idx = qp_idx * VIRTIO_QNUM;
+
+ reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
+ reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
+}
+
+static int
+alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
+{
+ struct vhost_virtqueue *virtqueue = NULL;
+ uint32_t virt_rx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_RXQ;
+ uint32_t virt_tx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_TXQ;
+
+ virtqueue = rte_malloc(NULL,
+ sizeof(struct vhost_virtqueue) * VIRTIO_QNUM, 0);
+ if (virtqueue == NULL) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to allocate memory for virt qp:%d.\n", qp_idx);
+ return -1;
+ }
+
+ dev->virtqueue[virt_rx_q_idx] = virtqueue;
+ dev->virtqueue[virt_tx_q_idx] = virtqueue + VIRTIO_TXQ;
+
+ init_vring_queue_pair(dev, qp_idx);
+
+ dev->virt_qp_nb += 1;
+
+ return 0;
+}
+
/*
- * Initialise all variables in device structure.
+ * Reset some variables in device structure, while keeping few
+ * others untouched, such as device_fh, ifname, virt_qp_nb: they
+ * should be same unless the device is removed.
*/
static void
-init_device(struct virtio_net *dev)
+reset_device(struct virtio_net *dev)
{
- uint64_t vq_offset;
-
- /* Virtqueues have already been malloced so we don't want to set them to NULL. */
- vq_offset = offsetof(struct virtio_net, mem);
+ uint32_t i;
- /* Set everything to 0. */
- memset((void*)(uintptr_t)((uint64_t)(uintptr_t)dev + vq_offset), 0,
- (sizeof(struct virtio_net) - (size_t)vq_offset));
- memset(dev->virtqueue[VIRTIO_RXQ], 0, sizeof(struct vhost_virtqueue));
- memset(dev->virtqueue[VIRTIO_TXQ], 0, sizeof(struct vhost_virtqueue));
+ dev->features = 0;
+ dev->protocol_features = 0;
+ dev->flags = 0;
- /* Backends are set to -1 indicating an inactive device. */
- dev->virtqueue[VIRTIO_RXQ]->backend = VIRTIO_DEV_STOPPED;
- dev->virtqueue[VIRTIO_TXQ]->backend = VIRTIO_DEV_STOPPED;
+ for (i = 0; i < dev->virt_qp_nb; i++)
+ reset_vring_queue_pair(dev, i);
}
/*
* initialised and a new entry is added to the device configuration linked
* list.
*/
-static int
-new_device(struct vhost_device_ctx ctx)
+int
+vhost_new_device(struct vhost_device_ctx ctx)
{
struct virtio_net_config_ll *new_ll_dev;
- struct vhost_virtqueue *virtqueue_rx, *virtqueue_tx;
-
- /*check the number of devices in the system*/
- if (num_cur_devices == num_devices) {
- RTE_LOG(ERR, VHOST_CONFIG, "() Max num devices (%u) exceeded\n", num_devices);
- return -1;
- }
/* Setup device and virtqueues. */
- new_ll_dev = malloc(sizeof(struct virtio_net_config_ll));
+ new_ll_dev = rte_zmalloc(NULL, sizeof(struct virtio_net_config_ll), 0);
if (new_ll_dev == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for dev.\n", ctx.fh);
- return -1;
- }
-
- virtqueue_rx = malloc(sizeof(struct vhost_virtqueue));
- if (virtqueue_rx == NULL) {
- free(new_ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for virtqueue_rx.\n", ctx.fh);
- return -1;
- }
-
- virtqueue_tx = malloc(sizeof(struct vhost_virtqueue));
- if (virtqueue_tx == NULL) {
- free(virtqueue_rx);
- free(new_ll_dev);
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for virtqueue_tx.\n", ctx.fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to allocate memory for dev.\n",
+ ctx.fh);
return -1;
}
- new_ll_dev->dev.virtqueue[VIRTIO_RXQ] = virtqueue_rx;
- new_ll_dev->dev.virtqueue[VIRTIO_TXQ] = virtqueue_tx;
-
- /* Initialise device and virtqueues. */
- init_device(&new_ll_dev->dev);
-
new_ll_dev->next = NULL;
/* Add entry to device configuration linked list. */
add_config_ll_entry(new_ll_dev);
- /*increment the number of devices in the system*/
- num_cur_devices++;
-
return new_ll_dev->dev.device_fh;
}
/*
- * Function is called from the CUSE release function. This function will cleanup
- * the device and remove it from device configuration linked list.
+ * Function is called from the CUSE release function. This function will
+ * cleanup the device and remove it from device configuration linked list.
*/
-static void
-destroy_device(struct vhost_device_ctx ctx)
+void
+vhost_destroy_device(struct vhost_device_ctx ctx)
{
struct virtio_net_config_ll *ll_dev_cur_ctx, *ll_dev_last = NULL;
struct virtio_net_config_ll *ll_dev_cur = ll_root;
/* Find the linked list entry for the device to be removed. */
ll_dev_cur_ctx = get_config_ll_entry(ctx);
while (ll_dev_cur != NULL) {
- /* If the device is found or a device that doesn't exist is found then it is removed. */
+ /*
+ * If the device is found or
+ * a device that doesn't exist is found then it is removed.
+ */
if (ll_dev_cur == ll_dev_cur_ctx) {
/*
- * If the device is running on a data core then call the function to remove it from
- * the data core.
+ * If the device is running on a data core then call
+ * the function to remove it from the data core.
*/
if ((ll_dev_cur->dev.flags & VIRTIO_DEV_RUNNING))
notify_ops->destroy_device(&(ll_dev_cur->dev));
- ll_dev_cur = rm_config_ll_entry(ll_dev_cur, ll_dev_last);
+ ll_dev_cur = rm_config_ll_entry(ll_dev_cur,
+ ll_dev_last);
} else {
ll_dev_last = ll_dev_cur;
ll_dev_cur = ll_dev_cur->next;
}
}
+}
- /*decrement the number of devices in the system*/
- num_cur_devices--;
+void
+vhost_set_ifname(struct vhost_device_ctx ctx,
+ const char *if_name, unsigned int if_len)
+{
+ struct virtio_net *dev;
+ unsigned int len;
+
+ dev = get_device(ctx);
+ if (dev == NULL)
+ return;
+
+ len = if_len > sizeof(dev->ifname) ?
+ sizeof(dev->ifname) : if_len;
+
+ strncpy(dev->ifname, if_name, len);
}
+
/*
* Called from CUSE IOCTL: VHOST_SET_OWNER
- * This function just returns success at the moment unless the device hasn't been initialised.
+ * This function just returns success at the moment unless
+ * the device hasn't been initialised.
*/
-static int
-set_owner(struct vhost_device_ctx ctx)
+int
+vhost_set_owner(struct vhost_device_ctx ctx)
{
struct virtio_net *dev;
/*
* Called from CUSE IOCTL: VHOST_RESET_OWNER
*/
-static int
-reset_owner(struct vhost_device_ctx ctx)
+int
+vhost_reset_owner(struct vhost_device_ctx ctx)
{
- struct virtio_net_config_ll *ll_dev;
+ struct virtio_net *dev;
- ll_dev = get_config_ll_entry(ctx);
+ dev = get_device(ctx);
+ if (dev == NULL)
+ return -1;
- cleanup_device(&ll_dev->dev);
- init_device(&ll_dev->dev);
+ if (dev->flags & VIRTIO_DEV_RUNNING)
+ notify_ops->destroy_device(dev);
+ cleanup_device(dev, 0);
+ reset_device(dev);
return 0;
}
* Called from CUSE IOCTL: VHOST_GET_FEATURES
* The features that we support are requested.
*/
-static int
-get_features(struct vhost_device_ctx ctx, uint64_t *pu)
+int
+vhost_get_features(struct vhost_device_ctx ctx, uint64_t *pu)
{
struct virtio_net *dev;
/*
* Called from CUSE IOCTL: VHOST_SET_FEATURES
- * We receive the negotiated set of features supported by us and the virtio device.
+ * We receive the negotiated features supported by us and the virtio device.
*/
-static int
-set_features(struct vhost_device_ctx ctx, uint64_t *pu)
+int
+vhost_set_features(struct vhost_device_ctx ctx, uint64_t *pu)
{
struct virtio_net *dev;
+ uint16_t vhost_hlen;
+ uint16_t i;
dev = get_device(ctx);
if (dev == NULL)
if (*pu & ~VHOST_FEATURES)
return -1;
- /* Store the negotiated feature list for the device. */
dev->features = *pu;
-
- /* Set the vhost_hlen depending on if VIRTIO_NET_F_MRG_RXBUF is set. */
- if (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) {
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mergeable RX buffers enabled\n", dev->device_fh);
- dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
- dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+ if (dev->features &
+ ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
+ vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
} else {
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Mergeable RX buffers disabled\n", dev->device_fh);
- dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = sizeof(struct virtio_net_hdr);
- dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = sizeof(struct virtio_net_hdr);
- }
- return 0;
-}
-
-/*
- * Calculate the region count of physical continous regions for one particular
- * region of whose vhost virtual address is continous. The particular region
- * start from vva_start, with size of 'size' in argument.
- */
-static uint32_t check_hpa_regions(uint64_t vva_start, uint64_t size)
-{
- uint32_t i, nregions = 0, page_size = PAGE_SIZE;
- uint64_t cur_phys_addr = 0, next_phys_addr = 0;
- if (vva_start % page_size) {
- LOG_DEBUG(VHOST_CONFIG,
- "in check_countinous: vva start(%p) mod page_size(%d) "
- "has remainder\n",
- (void *)(uintptr_t)vva_start, page_size);
- return 0;
- }
- if (size % page_size) {
- LOG_DEBUG(VHOST_CONFIG,
- "in check_countinous: "
- "size((%"PRIu64")) mod page_size(%d) has remainder\n",
- size, page_size);
- return 0;
- }
- for (i = 0; i < size - page_size; i = i + page_size) {
- cur_phys_addr
- = rte_mem_virt2phy((void *)(uintptr_t)(vva_start + i));
- next_phys_addr = rte_mem_virt2phy(
- (void *)(uintptr_t)(vva_start + i + page_size));
- if ((cur_phys_addr + page_size) != next_phys_addr) {
- ++nregions;
- LOG_DEBUG(VHOST_CONFIG,
- "in check_continuous: hva addr:(%p) is not "
- "continuous with hva addr:(%p), diff:%d\n",
- (void *)(uintptr_t)(vva_start + (uint64_t)i),
- (void *)(uintptr_t)(vva_start + (uint64_t)i
- + page_size), page_size);
- LOG_DEBUG(VHOST_CONFIG,
- "in check_continuous: hpa addr:(%p) is not "
- "continuous with hpa addr:(%p), "
- "diff:(%"PRIu64")\n",
- (void *)(uintptr_t)cur_phys_addr,
- (void *)(uintptr_t)next_phys_addr,
- (next_phys_addr-cur_phys_addr));
- }
+ vhost_hlen = sizeof(struct virtio_net_hdr);
}
- return nregions;
-}
+ LOG_DEBUG(VHOST_CONFIG,
+ "(%"PRIu64") Mergeable RX buffers %s, virtio 1 %s\n",
+ dev->device_fh,
+ (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
+ (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
-/*
- * Divide each region whose vhost virtual address is continous into a few
- * sub-regions, make sure the physical address within each sub-region are
- * continous. And fill offset(to GPA) and size etc. information of each
- * sub-region into regions_hpa.
- */
-static uint32_t fill_hpa_memory_regions(void *memory)
-{
- uint32_t regionidx, regionidx_hpa = 0, i, k, page_size = PAGE_SIZE;
- uint64_t cur_phys_addr = 0, next_phys_addr = 0, vva_start;
- struct virtio_memory *virtio_memory = (struct virtio_memory *)memory;
- struct virtio_memory_regions_hpa *mem_region_hpa
- = virtio_memory->regions_hpa;
+ for (i = 0; i < dev->virt_qp_nb; i++) {
+ uint16_t base_idx = i * VIRTIO_QNUM;
- if (mem_region_hpa == NULL)
- return 0;
-
- for (regionidx = 0; regionidx < virtio_memory->nregions; regionidx++) {
- vva_start = virtio_memory->regions[regionidx].guest_phys_address
- + virtio_memory->regions[regionidx].address_offset;
- mem_region_hpa[regionidx_hpa].guest_phys_address
- = virtio_memory->regions[regionidx].guest_phys_address;
- mem_region_hpa[regionidx_hpa].host_phys_addr_offset =
- rte_mem_virt2phy((void *)(uintptr_t)(vva_start))
- - mem_region_hpa[regionidx_hpa].guest_phys_address;
- LOG_DEBUG(VHOST_CONFIG,
- "in fill_hpa_regions: guest phys addr start[%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].guest_phys_address));
- LOG_DEBUG(VHOST_CONFIG,
- "in fill_hpa_regions: host phys addr start[%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].host_phys_addr_offset));
- for (i = 0, k = 0;
- i < virtio_memory->regions[regionidx].memory_size
- - page_size;
- i += page_size) {
- cur_phys_addr = rte_mem_virt2phy(
- (void *)(uintptr_t)(vva_start + i));
- next_phys_addr = rte_mem_virt2phy(
- (void *)(uintptr_t)(vva_start
- + i + page_size));
- if ((cur_phys_addr + page_size) != next_phys_addr) {
- mem_region_hpa[regionidx_hpa].guest_phys_address_end =
- mem_region_hpa[regionidx_hpa].guest_phys_address
- + k + page_size;
- mem_region_hpa[regionidx_hpa].memory_size
- = k + page_size;
- LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest "
- "phys addr end [%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].guest_phys_address_end));
- LOG_DEBUG(VHOST_CONFIG,
- "in fill_hpa_regions: guest phys addr "
- "size [%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].memory_size));
- mem_region_hpa[regionidx_hpa + 1].guest_phys_address
- = mem_region_hpa[regionidx_hpa].guest_phys_address_end;
- ++regionidx_hpa;
- mem_region_hpa[regionidx_hpa].host_phys_addr_offset =
- next_phys_addr
- - mem_region_hpa[regionidx_hpa].guest_phys_address;
- LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest"
- " phys addr start[%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].guest_phys_address));
- LOG_DEBUG(VHOST_CONFIG,
- "in fill_hpa_regions: host phys addr "
- "start[%d]:(%p)\n",
- regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].host_phys_addr_offset));
- k = 0;
- } else {
- k += page_size;
- }
- }
- mem_region_hpa[regionidx_hpa].guest_phys_address_end
- = mem_region_hpa[regionidx_hpa].guest_phys_address
- + k + page_size;
- mem_region_hpa[regionidx_hpa].memory_size = k + page_size;
- LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr end "
- "[%d]:(%p)\n", regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].guest_phys_address_end));
- LOG_DEBUG(VHOST_CONFIG, "in fill_hpa_regions: guest phys addr size "
- "[%d]:(%p)\n", regionidx_hpa,
- (void *)(uintptr_t)
- (mem_region_hpa[regionidx_hpa].memory_size));
- ++regionidx_hpa;
+ dev->virtqueue[base_idx + VIRTIO_RXQ]->vhost_hlen = vhost_hlen;
+ dev->virtqueue[base_idx + VIRTIO_TXQ]->vhost_hlen = vhost_hlen;
}
- return regionidx_hpa;
+
+ return 0;
}
/*
- * Called from CUSE IOCTL: VHOST_SET_MEM_TABLE
- * This function creates and populates the memory structure for the device. This includes
- * storing offsets used to translate buffer addresses.
+ * Called from CUSE IOCTL: VHOST_SET_VRING_NUM
+ * The virtio device sends us the size of the descriptor ring.
*/
-static int
-set_mem_table(struct vhost_device_ctx ctx, const void *mem_regions_addr, uint32_t nregions)
+int
+vhost_set_vring_num(struct vhost_device_ctx ctx,
+ struct vhost_vring_state *state)
{
struct virtio_net *dev;
- struct vhost_memory_region *mem_regions;
- struct virtio_memory *mem;
- uint64_t size = offsetof(struct vhost_memory, regions);
- uint32_t regionidx, valid_regions;
dev = get_device(ctx);
if (dev == NULL)
return -1;
- if (dev->mem) {
- munmap((void*)(uintptr_t)dev->mem->mapped_address, (size_t)dev->mem->mapped_size);
- free(dev->mem);
- }
-
- /* Malloc the memory structure depending on the number of regions. */
- mem = calloc(1, sizeof(struct virtio_memory) + (sizeof(struct virtio_memory_regions) * nregions));
- if (mem == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to allocate memory for dev->mem.\n", dev->device_fh);
- return -1;
- }
-
- mem->nregions = nregions;
-
- mem_regions = (void*)(uintptr_t)((uint64_t)(uintptr_t)mem_regions_addr + size);
-
- for (regionidx = 0; regionidx < mem->nregions; regionidx++) {
- /* Populate the region structure for each region. */
- mem->regions[regionidx].guest_phys_address = mem_regions[regionidx].guest_phys_addr;
- mem->regions[regionidx].guest_phys_address_end = mem->regions[regionidx].guest_phys_address +
- mem_regions[regionidx].memory_size;
- mem->regions[regionidx].memory_size = mem_regions[regionidx].memory_size;
- mem->regions[regionidx].userspace_address = mem_regions[regionidx].userspace_addr;
-
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") REGION: %u - GPA: %p - QEMU VA: %p - SIZE (%"PRIu64")\n", dev->device_fh,
- regionidx, (void*)(uintptr_t)mem->regions[regionidx].guest_phys_address,
- (void*)(uintptr_t)mem->regions[regionidx].userspace_address,
- mem->regions[regionidx].memory_size);
-
- /*set the base address mapping*/
- if (mem->regions[regionidx].guest_phys_address == 0x0) {
- mem->base_address = mem->regions[regionidx].userspace_address;
- /* Map VM memory file */
- if (host_memory_map(dev, mem, ctx.pid, mem->base_address) != 0) {
- free(mem);
- return -1;
- }
- }
- }
-
- /* Check that we have a valid base address. */
- if (mem->base_address == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find base address of qemu memory file.\n", dev->device_fh);
- free(mem);
- return -1;
- }
-
- /* Check if all of our regions have valid mappings. Usually one does not exist in the QEMU memory file. */
- valid_regions = mem->nregions;
- for (regionidx = 0; regionidx < mem->nregions; regionidx++) {
- if ((mem->regions[regionidx].userspace_address < mem->base_address) ||
- (mem->regions[regionidx].userspace_address > (mem->base_address + mem->mapped_size)))
- valid_regions--;
- }
-
- /* If a region does not have a valid mapping we rebuild our memory struct to contain only valid entries. */
- if (valid_regions != mem->nregions) {
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Not all memory regions exist in the QEMU mem file. Re-populating mem structure\n",
- dev->device_fh);
-
- /* Re-populate the memory structure with only valid regions. Invalid regions are over-written with memmove. */
- valid_regions = 0;
-
- for (regionidx = mem->nregions; 0 != regionidx--;) {
- if ((mem->regions[regionidx].userspace_address < mem->base_address) ||
- (mem->regions[regionidx].userspace_address > (mem->base_address + mem->mapped_size))) {
- memmove(&mem->regions[regionidx], &mem->regions[regionidx + 1],
- sizeof(struct virtio_memory_regions) * valid_regions);
- } else {
- valid_regions++;
- }
- }
- }
- mem->nregions = valid_regions;
- mem->nregions_hpa = mem->nregions;
- dev->mem = mem;
-
- /*
- * Calculate the address offset for each region. This offset is used to identify the vhost virtual address
- * corresponding to a QEMU guest physical address.
- */
- for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
- dev->mem->regions[regionidx].address_offset = dev->mem->regions[regionidx].userspace_address - dev->mem->base_address
- + dev->mem->mapped_address - dev->mem->regions[regionidx].guest_phys_address;
-
- dev->mem->nregions_hpa
- += check_hpa_regions(
- dev->mem->regions[regionidx].guest_phys_address
- + dev->mem->regions[regionidx].address_offset,
- dev->mem->regions[regionidx].memory_size);
- }
- if (dev->mem->regions_hpa != NULL) {
- free(dev->mem->regions_hpa);
- dev->mem->regions_hpa = NULL;
- }
-
- dev->mem->regions_hpa = (struct virtio_memory_regions_hpa *) calloc(1,
- (sizeof(struct virtio_memory_regions_hpa)
- * dev->mem->nregions_hpa));
- if (dev->mem->regions_hpa == NULL) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "(%"PRIu64") Failed to allocate memory for "
- "dev->mem->regions_hpa.\n", dev->device_fh);
- return -1;
- }
- if (fill_hpa_memory_regions(
- (void *)dev->mem) != dev->mem->nregions_hpa) {
- RTE_LOG(ERR, VHOST_CONFIG,
- "in set_mem_table: hpa memory regions number mismatch: "
- "[%d]\n", dev->mem->nregions_hpa);
- return -1;
- }
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
+ dev->virtqueue[state->index]->size = state->num;
return 0;
}
/*
- * Called from CUSE IOCTL: VHOST_SET_VRING_NUM
- * The virtio device sends us the size of the descriptor ring.
+ * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
+ * same numa node as the memory of vring descriptor.
*/
-static int
-set_vring_num(struct vhost_device_ctx ctx, struct vhost_vring_state *state)
+#ifdef RTE_LIBRTE_VHOST_NUMA
+static struct virtio_net*
+numa_realloc(struct virtio_net *dev, int index)
{
- struct virtio_net *dev;
-
- dev = get_device(ctx);
- if (dev == NULL)
- return -1;
+ int oldnode, newnode;
+ struct virtio_net_config_ll *old_ll_dev, *new_ll_dev = NULL;
+ struct vhost_virtqueue *old_vq, *new_vq = NULL;
+ int ret;
+ int realloc_dev = 0, realloc_vq = 0;
+
+ old_ll_dev = (struct virtio_net_config_ll *)dev;
+ old_vq = dev->virtqueue[index];
+
+ ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
+ MPOL_F_NODE | MPOL_F_ADDR);
+ ret = ret | get_mempolicy(&oldnode, NULL, 0, old_ll_dev,
+ MPOL_F_NODE | MPOL_F_ADDR);
+ if (ret) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Unable to get vring desc or dev numa information.\n");
+ return dev;
+ }
+ if (oldnode != newnode)
+ realloc_dev = 1;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
- dev->virtqueue[state->index]->size = state->num;
+ ret = get_mempolicy(&oldnode, NULL, 0, old_vq,
+ MPOL_F_NODE | MPOL_F_ADDR);
+ if (ret) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Unable to get vq numa information.\n");
+ return dev;
+ }
+ if (oldnode != newnode)
+ realloc_vq = 1;
+
+ if (realloc_dev == 0 && realloc_vq == 0)
+ return dev;
+
+ if (realloc_dev)
+ new_ll_dev = rte_malloc_socket(NULL,
+ sizeof(struct virtio_net_config_ll), 0, newnode);
+ if (realloc_vq)
+ new_vq = rte_malloc_socket(NULL,
+ sizeof(struct vhost_virtqueue), 0, newnode);
+ if (!new_ll_dev && !new_vq)
+ return dev;
+
+ if (realloc_vq)
+ memcpy(new_vq, old_vq, sizeof(*new_vq));
+ if (realloc_dev)
+ memcpy(new_ll_dev, old_ll_dev, sizeof(*new_ll_dev));
+ (new_ll_dev ? new_ll_dev : old_ll_dev)->dev.virtqueue[index] =
+ new_vq ? new_vq : old_vq;
+ if (realloc_vq)
+ rte_free(old_vq);
+ if (realloc_dev) {
+ if (ll_root == old_ll_dev)
+ ll_root = new_ll_dev;
+ else {
+ struct virtio_net_config_ll *prev = ll_root;
+ while (prev->next != old_ll_dev)
+ prev = prev->next;
+ prev->next = new_ll_dev;
+ new_ll_dev->next = old_ll_dev->next;
+ }
+ rte_free(old_ll_dev);
+ }
- return 0;
+ return realloc_dev ? &new_ll_dev->dev : dev;
+}
+#else
+static struct virtio_net*
+numa_realloc(struct virtio_net *dev, int index __rte_unused)
+{
+ return dev;
}
+#endif
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_ADDR
- * The virtio device sends us the desc, used and avail ring addresses. This function
- * then converts these to our address space.
+ * The virtio device sends us the desc, used and avail ring addresses.
+ * This function then converts these to our address space.
*/
-static int
-set_vring_addr(struct vhost_device_ctx ctx, struct vhost_vring_addr *addr)
+int
+vhost_set_vring_addr(struct vhost_device_ctx ctx, struct vhost_vring_addr *addr)
{
struct virtio_net *dev;
struct vhost_virtqueue *vq;
dev = get_device(ctx);
- if (dev == NULL)
+ if ((dev == NULL) || (dev->mem == NULL))
return -1;
- /* addr->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* addr->index refers to the queue index. The txq 1, rxq is 0. */
vq = dev->virtqueue[addr->index];
/* The addresses are converted from QEMU virtual to Vhost virtual. */
- vq->desc = (struct vring_desc*)(uintptr_t)qva_to_vva(dev, addr->desc_user_addr);
+ vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
+ addr->desc_user_addr);
if (vq->desc == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find descriptor ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find desc ring address.\n",
+ dev->device_fh);
return -1;
}
- vq->avail = (struct vring_avail*)(uintptr_t)qva_to_vva(dev, addr->avail_user_addr);
+ dev = numa_realloc(dev, addr->index);
+ vq = dev->virtqueue[addr->index];
+
+ vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
+ addr->avail_user_addr);
if (vq->avail == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find available ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find avail ring address.\n",
+ dev->device_fh);
return -1;
}
- vq->used = (struct vring_used*)(uintptr_t)qva_to_vva(dev, addr->used_user_addr);
+ vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
+ addr->used_user_addr);
if (vq->used == 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find used ring address.\n", dev->device_fh);
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%"PRIu64") Failed to find used ring address.\n",
+ dev->device_fh);
return -1;
}
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n", dev->device_fh, vq->desc);
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n", dev->device_fh, vq->avail);
- LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n", dev->device_fh, vq->used);
+ vq->log_guest_addr = addr->log_guest_addr;
+
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n",
+ dev->device_fh, vq->desc);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n",
+ dev->device_fh, vq->avail);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n",
+ dev->device_fh, vq->used);
+ LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") log_guest_addr: %"PRIx64"\n",
+ dev->device_fh, vq->log_guest_addr);
return 0;
}
* Called from CUSE IOCTL: VHOST_SET_VRING_BASE
* The virtio device sends us the available ring last used index.
*/
-static int
-set_vring_base(struct vhost_device_ctx ctx, struct vhost_vring_state *state)
+int
+vhost_set_vring_base(struct vhost_device_ctx ctx,
+ struct vhost_vring_state *state)
{
struct virtio_net *dev;
if (dev == NULL)
return -1;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
dev->virtqueue[state->index]->last_used_idx = state->num;
dev->virtqueue[state->index]->last_used_idx_res = state->num;
* Called from CUSE IOCTL: VHOST_GET_VRING_BASE
* We send the virtio device our available ring last used index.
*/
-static int
-get_vring_base(struct vhost_device_ctx ctx, uint32_t index, struct vhost_vring_state *state)
+int
+vhost_get_vring_base(struct vhost_device_ctx ctx, uint32_t index,
+ struct vhost_vring_state *state)
{
struct virtio_net *dev;
return -1;
state->index = index;
- /* State->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* State->index refers to the queue index. The txq is 1, rxq is 0. */
state->num = dev->virtqueue[state->index]->last_used_idx;
return 0;
}
-/*
- * This function uses the eventfd_link kernel module to copy an eventfd file descriptor
- * provided by QEMU in to our process space.
- */
-static int
-eventfd_copy(struct virtio_net *dev, struct eventfd_copy *eventfd_copy)
-{
- int eventfd_link, ret;
-
- /* Open the character device to the kernel module. */
- eventfd_link = open(eventfd_cdev, O_RDWR);
- if (eventfd_link < 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") eventfd_link module is not loaded\n", dev->device_fh);
- return -1;
- }
-
- /* Call the IOCTL to copy the eventfd. */
- ret = ioctl(eventfd_link, EVENTFD_COPY, eventfd_copy);
- close(eventfd_link);
-
- if (ret < 0) {
- RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") EVENTFD_COPY ioctl failed\n", dev->device_fh);
- return -1;
- }
-
-
- return 0;
-}
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_CALL
- * The virtio device sends an eventfd to interrupt the guest. This fd gets copied in
- * to our process space.
+ * The virtio device sends an eventfd to interrupt the guest. This fd gets
+ * copied into our process space.
*/
-static int
-set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
+int
+vhost_set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
{
struct virtio_net *dev;
- struct eventfd_copy eventfd_kick;
struct vhost_virtqueue *vq;
+ uint32_t cur_qp_idx = file->index / VIRTIO_QNUM;
dev = get_device(ctx);
if (dev == NULL)
return -1;
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
- vq = dev->virtqueue[file->index];
+ /*
+ * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
+ * we get, so we do vring queue pair allocation here.
+ */
+ if (cur_qp_idx + 1 > dev->virt_qp_nb) {
+ if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
+ return -1;
+ }
- if (vq->kickfd)
- close((int)vq->kickfd);
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
+ vq = dev->virtqueue[file->index];
+ assert(vq != NULL);
- /* Populate the eventfd_copy structure and call eventfd_copy. */
- vq->kickfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
- eventfd_kick.source_fd = vq->kickfd;
- eventfd_kick.target_fd = file->fd;
- eventfd_kick.target_pid = ctx.pid;
+ if (vq->callfd >= 0)
+ close(vq->callfd);
- if (eventfd_copy(dev, &eventfd_kick))
- return -1;
+ vq->callfd = file->fd;
return 0;
}
/*
* Called from CUSE IOCTL: VHOST_SET_VRING_KICK
- * The virtio device sends an eventfd that it can use to notify us. This fd gets copied in
- * to our process space.
+ * The virtio device sends an eventfd that it can use to notify us.
+ * This fd gets copied into our process space.
*/
-static int
-set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
+int
+vhost_set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
{
struct virtio_net *dev;
- struct eventfd_copy eventfd_call;
struct vhost_virtqueue *vq;
dev = get_device(ctx);
if (dev == NULL)
return -1;
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
vq = dev->virtqueue[file->index];
- if (vq->callfd)
- close((int)vq->callfd);
+ if (vq->kickfd >= 0)
+ close(vq->kickfd);
- /* Populate the eventfd_copy structure and call eventfd_copy. */
- vq->callfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
- eventfd_call.source_fd = vq->callfd;
- eventfd_call.target_fd = file->fd;
- eventfd_call.target_pid = ctx.pid;
-
- if (eventfd_copy(dev, &eventfd_call))
- return -1;
+ vq->kickfd = file->fd;
return 0;
}
/*
* Called from CUSE IOCTL: VHOST_NET_SET_BACKEND
- * To complete device initialisation when the virtio driver is loaded we are provided with a
- * valid fd for a tap device (not used by us). If this happens then we can add the device to a
- * data core. When the virtio driver is removed we get fd=-1. At that point we remove the device
- * from the data core. The device will still exist in the device configuration linked list.
+ * To complete device initialisation when the virtio driver is loaded,
+ * we are provided with a valid fd for a tap device (not used by us).
+ * If this happens then we can add the device to a data core.
+ * When the virtio driver is removed we get fd=-1.
+ * At that point we remove the device from the data core.
+ * The device will still exist in the device configuration linked list.
*/
-static int
-set_backend(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
+int
+vhost_set_backend(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
{
struct virtio_net *dev;
dev = get_device(ctx);
- if (dev == NULL) {
+ if (dev == NULL)
return -1;
- }
- /* file->index refers to the queue index. The TX queue is 1, RX queue is 0. */
+ /* file->index refers to the queue index. The txq is 1, rxq is 0. */
dev->virtqueue[file->index]->backend = file->fd;
- /* If the device isn't already running and both backend fds are set we add the device. */
+ /*
+ * If the device isn't already running and both backend fds are set,
+ * we add the device.
+ */
if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
if (((int)dev->virtqueue[VIRTIO_TXQ]->backend != VIRTIO_DEV_STOPPED) &&
- ((int)dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED))
+ ((int)dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED)) {
return notify_ops->new_device(dev);
+ }
/* Otherwise we remove it. */
} else
- if (file->fd == VIRTIO_DEV_STOPPED) {
+ if (file->fd == VIRTIO_DEV_STOPPED)
notify_ops->destroy_device(dev);
- }
return 0;
}
-/*
- * Function pointers are set for the device operations to allow CUSE to call functions
- * when an IOCTL, device_add or device_release is received.
- */
-static const struct vhost_net_device_ops vhost_device_ops =
+int rte_vhost_enable_guest_notification(struct virtio_net *dev,
+ uint16_t queue_id, int enable)
{
- .new_device = new_device,
- .destroy_device = destroy_device,
-
- .get_features = get_features,
- .set_features = set_features,
-
- .set_mem_table = set_mem_table,
-
- .set_vring_num = set_vring_num,
- .set_vring_addr = set_vring_addr,
- .set_vring_base = set_vring_base,
- .get_vring_base = get_vring_base,
+ if (enable) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "guest notification isn't supported.\n");
+ return -1;
+ }
- .set_vring_kick = set_vring_kick,
- .set_vring_call = set_vring_call,
+ dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
+ return 0;
+}
- .set_backend = set_backend,
+uint64_t rte_vhost_feature_get(void)
+{
+ return VHOST_FEATURES;
+}
- .set_owner = set_owner,
- .reset_owner = reset_owner,
-};
+int rte_vhost_feature_disable(uint64_t feature_mask)
+{
+ VHOST_FEATURES = VHOST_FEATURES & ~feature_mask;
+ return 0;
+}
-/*
- * Called by main to setup callbacks when registering CUSE device.
- */
-struct vhost_net_device_ops const *
-get_virtio_net_callbacks(void)
+int rte_vhost_feature_enable(uint64_t feature_mask)
{
- return &vhost_device_ops;
+ if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) {
+ VHOST_FEATURES = VHOST_FEATURES | feature_mask;
+ return 0;
+ }
+ return -1;
}
/*
* Register ops so that we can add/remove device to data core.
*/
int
-init_virtio_net(struct virtio_net_device_ops const * const ops)
+rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const ops)
{
notify_ops = ops;
return 0;
}
-
-/*
- * Currently not used as we Ctrl+c to exit application.
- */
-int
-deinit_virtio_net(void)
-{
- return 0;
-}
git.droids-corp.org / dpdk.git / blobdiff