* Copyright(c) 2020-2021 Xilinx, Inc.
*/
+#include <sys/ioctl.h>
+
#include <rte_errno.h>
#include <rte_malloc.h>
#include <rte_vdpa.h>
+#include <rte_vfio.h>
#include <rte_vhost.h>
#include <vdpa_driver.h>
#define SFC_VDPA_DEFAULT_FEATURES \
(1ULL << VHOST_USER_F_PROTOCOL_FEATURES)
-static int
-sfc_vdpa_get_queue_num(struct rte_vdpa_device *vdpa_dev, uint32_t *queue_num)
-{
- struct sfc_vdpa_ops_data *ops_data;
- void *dev;
-
- ops_data = sfc_vdpa_get_data_by_dev(vdpa_dev);
- if (ops_data == NULL)
- return -1;
-
- dev = ops_data->dev_handle;
- *queue_num = sfc_vdpa_adapter_by_dev_handle(dev)->max_queue_count;
+#define SFC_VDPA_MSIX_IRQ_SET_BUF_LEN \
+ (sizeof(struct vfio_irq_set) + \
+ sizeof(int) * (SFC_VDPA_MAX_QUEUE_PAIRS * 2 + 1))
- sfc_vdpa_info(dev, "vDPA ops get_queue_num :: supported queue num : %u",
- *queue_num);
-
- return 0;
-}
+/* It will be used for target VF when calling function is not PF */
+#define SFC_VDPA_VF_NULL 0xFFFF
static int
sfc_vdpa_get_device_features(struct sfc_vdpa_ops_data *ops_data)
return 0;
}
+static uint64_t
+hva_to_gpa(int vid, uint64_t hva)
+{
+ struct rte_vhost_memory *vhost_mem = NULL;
+ struct rte_vhost_mem_region *mem_reg = NULL;
+ uint32_t i;
+ uint64_t gpa = 0;
+
+ if (rte_vhost_get_mem_table(vid, &vhost_mem) < 0)
+ goto error;
+
+ for (i = 0; i < vhost_mem->nregions; i++) {
+ mem_reg = &vhost_mem->regions[i];
+
+ if (hva >= mem_reg->host_user_addr &&
+ hva < mem_reg->host_user_addr + mem_reg->size) {
+ gpa = (hva - mem_reg->host_user_addr) +
+ mem_reg->guest_phys_addr;
+ break;
+ }
+ }
+
+error:
+ free(vhost_mem);
+ return gpa;
+}
+
+static int
+sfc_vdpa_enable_vfio_intr(struct sfc_vdpa_ops_data *ops_data)
+{
+ int rc;
+ int *irq_fd_ptr;
+ int vfio_dev_fd;
+ uint32_t i, num_vring;
+ struct rte_vhost_vring vring;
+ struct vfio_irq_set *irq_set;
+ struct rte_pci_device *pci_dev;
+ char irq_set_buf[SFC_VDPA_MSIX_IRQ_SET_BUF_LEN];
+ void *dev;
+
+ num_vring = rte_vhost_get_vring_num(ops_data->vid);
+ dev = ops_data->dev_handle;
+ vfio_dev_fd = sfc_vdpa_adapter_by_dev_handle(dev)->vfio_dev_fd;
+ pci_dev = sfc_vdpa_adapter_by_dev_handle(dev)->pdev;
+
+ irq_set = (struct vfio_irq_set *)irq_set_buf;
+ irq_set->argsz = sizeof(irq_set_buf);
+ irq_set->count = num_vring + 1;
+ irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
+ VFIO_IRQ_SET_ACTION_TRIGGER;
+ irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
+ irq_set->start = 0;
+ irq_fd_ptr = (int *)&irq_set->data;
+ irq_fd_ptr[RTE_INTR_VEC_ZERO_OFFSET] =
+ rte_intr_fd_get(pci_dev->intr_handle);
+
+ for (i = 0; i < num_vring; i++) {
+ rc = rte_vhost_get_vhost_vring(ops_data->vid, i, &vring);
+ if (rc)
+ return -1;
+
+ irq_fd_ptr[RTE_INTR_VEC_RXTX_OFFSET + i] = vring.callfd;
+ }
+
+ rc = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+ if (rc) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "error enabling MSI-X interrupts: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+sfc_vdpa_disable_vfio_intr(struct sfc_vdpa_ops_data *ops_data)
+{
+ int rc;
+ int vfio_dev_fd;
+ struct vfio_irq_set irq_set;
+ void *dev;
+
+ dev = ops_data->dev_handle;
+ vfio_dev_fd = sfc_vdpa_adapter_by_dev_handle(dev)->vfio_dev_fd;
+
+ irq_set.argsz = sizeof(irq_set);
+ irq_set.count = 0;
+ irq_set.flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
+ irq_set.index = VFIO_PCI_MSIX_IRQ_INDEX;
+ irq_set.start = 0;
+
+ rc = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, &irq_set);
+ if (rc) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "error disabling MSI-X interrupts: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+sfc_vdpa_get_vring_info(struct sfc_vdpa_ops_data *ops_data,
+ int vq_num, struct sfc_vdpa_vring_info *vring)
+{
+ int rc;
+ uint64_t gpa;
+ struct rte_vhost_vring vq;
+
+ rc = rte_vhost_get_vhost_vring(ops_data->vid, vq_num, &vq);
+ if (rc < 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "get vhost vring failed: %s", rte_strerror(rc));
+ return rc;
+ }
+
+ gpa = hva_to_gpa(ops_data->vid, (uint64_t)(uintptr_t)vq.desc);
+ if (gpa == 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "fail to get GPA for descriptor ring.");
+ return -1;
+ }
+ vring->desc = gpa;
+
+ gpa = hva_to_gpa(ops_data->vid, (uint64_t)(uintptr_t)vq.avail);
+ if (gpa == 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "fail to get GPA for available ring.");
+ return -1;
+ }
+ vring->avail = gpa;
+
+ gpa = hva_to_gpa(ops_data->vid, (uint64_t)(uintptr_t)vq.used);
+ if (gpa == 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "fail to get GPA for used ring.");
+ return -1;
+ }
+ vring->used = gpa;
+
+ vring->size = vq.size;
+
+ rc = rte_vhost_get_vring_base(ops_data->vid, vq_num,
+ &vring->last_avail_idx,
+ &vring->last_used_idx);
+
+ return rc;
+}
+
+static int
+sfc_vdpa_virtq_start(struct sfc_vdpa_ops_data *ops_data, int vq_num)
+{
+ int rc;
+ efx_virtio_vq_t *vq;
+ struct sfc_vdpa_vring_info vring;
+ efx_virtio_vq_cfg_t vq_cfg;
+ efx_virtio_vq_dyncfg_t vq_dyncfg;
+
+ vq = ops_data->vq_cxt[vq_num].vq;
+ if (vq == NULL)
+ return -1;
+
+ rc = sfc_vdpa_get_vring_info(ops_data, vq_num, &vring);
+ if (rc < 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "get vring info failed: %s", rte_strerror(rc));
+ goto fail_vring_info;
+ }
+
+ vq_cfg.evvc_target_vf = SFC_VDPA_VF_NULL;
+
+ /* even virtqueue for RX and odd for TX */
+ if (vq_num % 2) {
+ vq_cfg.evvc_type = EFX_VIRTIO_VQ_TYPE_NET_TXQ;
+ sfc_vdpa_info(ops_data->dev_handle,
+ "configure virtqueue # %d (TXQ)", vq_num);
+ } else {
+ vq_cfg.evvc_type = EFX_VIRTIO_VQ_TYPE_NET_RXQ;
+ sfc_vdpa_info(ops_data->dev_handle,
+ "configure virtqueue # %d (RXQ)", vq_num);
+ }
+
+ vq_cfg.evvc_vq_num = vq_num;
+ vq_cfg.evvc_desc_tbl_addr = vring.desc;
+ vq_cfg.evvc_avail_ring_addr = vring.avail;
+ vq_cfg.evvc_used_ring_addr = vring.used;
+ vq_cfg.evvc_vq_size = vring.size;
+
+ vq_dyncfg.evvd_vq_pidx = vring.last_used_idx;
+ vq_dyncfg.evvd_vq_cidx = vring.last_avail_idx;
+
+ /* MSI-X vector is function-relative */
+ vq_cfg.evvc_msix_vector = RTE_INTR_VEC_RXTX_OFFSET + vq_num;
+ if (ops_data->vdpa_context == SFC_VDPA_AS_VF)
+ vq_cfg.evvc_pas_id = 0;
+ vq_cfg.evcc_features = ops_data->dev_features &
+ ops_data->req_features;
+
+ /* Start virtqueue */
+ rc = efx_virtio_qstart(vq, &vq_cfg, &vq_dyncfg);
+ if (rc != 0) {
+ /* destroy virtqueue */
+ sfc_vdpa_err(ops_data->dev_handle,
+ "virtqueue start failed: %s",
+ rte_strerror(rc));
+ efx_virtio_qdestroy(vq);
+ goto fail_virtio_qstart;
+ }
+
+ sfc_vdpa_info(ops_data->dev_handle,
+ "virtqueue started successfully for vq_num %d", vq_num);
+
+ ops_data->vq_cxt[vq_num].enable = B_TRUE;
+
+ return rc;
+
+fail_virtio_qstart:
+fail_vring_info:
+ return rc;
+}
+
+static int
+sfc_vdpa_virtq_stop(struct sfc_vdpa_ops_data *ops_data, int vq_num)
+{
+ int rc;
+ efx_virtio_vq_dyncfg_t vq_idx;
+ efx_virtio_vq_t *vq;
+
+ if (ops_data->vq_cxt[vq_num].enable != B_TRUE)
+ return -1;
+
+ vq = ops_data->vq_cxt[vq_num].vq;
+ if (vq == NULL)
+ return -1;
+
+ /* stop the vq */
+ rc = efx_virtio_qstop(vq, &vq_idx);
+ if (rc == 0) {
+ ops_data->vq_cxt[vq_num].cidx = vq_idx.evvd_vq_cidx;
+ ops_data->vq_cxt[vq_num].pidx = vq_idx.evvd_vq_pidx;
+ }
+ ops_data->vq_cxt[vq_num].enable = B_FALSE;
+
+ return rc;
+}
+
+static int
+sfc_vdpa_configure(struct sfc_vdpa_ops_data *ops_data)
+{
+ int rc, i;
+ int nr_vring;
+ int max_vring_cnt;
+ efx_virtio_vq_t *vq;
+ efx_nic_t *nic;
+ void *dev;
+
+ dev = ops_data->dev_handle;
+ nic = sfc_vdpa_adapter_by_dev_handle(dev)->nic;
+
+ SFC_EFX_ASSERT(ops_data->state == SFC_VDPA_STATE_INITIALIZED);
+
+ ops_data->state = SFC_VDPA_STATE_CONFIGURING;
+
+ nr_vring = rte_vhost_get_vring_num(ops_data->vid);
+ max_vring_cnt =
+ (sfc_vdpa_adapter_by_dev_handle(dev)->max_queue_count * 2);
+
+ /* number of vring should not be more than supported max vq count */
+ if (nr_vring > max_vring_cnt) {
+ sfc_vdpa_err(dev,
+ "nr_vring (%d) is > max vring count (%d)",
+ nr_vring, max_vring_cnt);
+ goto fail_vring_num;
+ }
+
+ rc = sfc_vdpa_dma_map(ops_data, true);
+ if (rc) {
+ sfc_vdpa_err(dev,
+ "DMA map failed: %s", rte_strerror(rc));
+ goto fail_dma_map;
+ }
+
+ for (i = 0; i < nr_vring; i++) {
+ rc = efx_virtio_qcreate(nic, &vq);
+ if ((rc != 0) || (vq == NULL)) {
+ sfc_vdpa_err(dev,
+ "virtqueue create failed: %s",
+ rte_strerror(rc));
+ goto fail_vq_create;
+ }
+
+ /* store created virtqueue context */
+ ops_data->vq_cxt[i].vq = vq;
+ }
+
+ ops_data->vq_count = i;
+
+ ops_data->state = SFC_VDPA_STATE_CONFIGURED;
+
+ return 0;
+
+fail_vq_create:
+ sfc_vdpa_dma_map(ops_data, false);
+
+fail_dma_map:
+fail_vring_num:
+ ops_data->state = SFC_VDPA_STATE_INITIALIZED;
+
+ return -1;
+}
+
+static void
+sfc_vdpa_close(struct sfc_vdpa_ops_data *ops_data)
+{
+ int i;
+
+ if (ops_data->state != SFC_VDPA_STATE_CONFIGURED)
+ return;
+
+ ops_data->state = SFC_VDPA_STATE_CLOSING;
+
+ for (i = 0; i < ops_data->vq_count; i++) {
+ if (ops_data->vq_cxt[i].vq == NULL)
+ continue;
+
+ efx_virtio_qdestroy(ops_data->vq_cxt[i].vq);
+ }
+
+ sfc_vdpa_dma_map(ops_data, false);
+
+ ops_data->state = SFC_VDPA_STATE_INITIALIZED;
+}
+
+static void
+sfc_vdpa_stop(struct sfc_vdpa_ops_data *ops_data)
+{
+ int i;
+ int rc;
+
+ if (ops_data->state != SFC_VDPA_STATE_STARTED)
+ return;
+
+ ops_data->state = SFC_VDPA_STATE_STOPPING;
+
+ for (i = 0; i < ops_data->vq_count; i++) {
+ rc = sfc_vdpa_virtq_stop(ops_data, i);
+ if (rc != 0)
+ continue;
+ }
+
+ sfc_vdpa_disable_vfio_intr(ops_data);
+
+ ops_data->state = SFC_VDPA_STATE_CONFIGURED;
+}
+
+static int
+sfc_vdpa_start(struct sfc_vdpa_ops_data *ops_data)
+{
+ int i, j;
+ int rc;
+
+ SFC_EFX_ASSERT(ops_data->state == SFC_VDPA_STATE_CONFIGURED);
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "entry");
+
+ ops_data->state = SFC_VDPA_STATE_STARTING;
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "enable interrupts");
+ rc = sfc_vdpa_enable_vfio_intr(ops_data);
+ if (rc < 0) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "vfio intr allocation failed: %s",
+ rte_strerror(rc));
+ goto fail_enable_vfio_intr;
+ }
+
+ rte_vhost_get_negotiated_features(ops_data->vid,
+ &ops_data->req_features);
+
+ sfc_vdpa_info(ops_data->dev_handle,
+ "negotiated feature : 0x%" PRIx64,
+ ops_data->req_features);
+
+ for (i = 0; i < ops_data->vq_count; i++) {
+ sfc_vdpa_log_init(ops_data->dev_handle,
+ "starting vq# %d", i);
+ rc = sfc_vdpa_virtq_start(ops_data, i);
+ if (rc != 0)
+ goto fail_vq_start;
+ }
+
+ ops_data->state = SFC_VDPA_STATE_STARTED;
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "done");
+
+ return 0;
+
+fail_vq_start:
+ /* stop already started virtqueues */
+ for (j = 0; j < i; j++)
+ sfc_vdpa_virtq_stop(ops_data, j);
+ sfc_vdpa_disable_vfio_intr(ops_data);
+
+fail_enable_vfio_intr:
+ ops_data->state = SFC_VDPA_STATE_CONFIGURED;
+
+ return rc;
+}
+
+static int
+sfc_vdpa_get_queue_num(struct rte_vdpa_device *vdpa_dev, uint32_t *queue_num)
+{
+ struct sfc_vdpa_ops_data *ops_data;
+ void *dev;
+
+ ops_data = sfc_vdpa_get_data_by_dev(vdpa_dev);
+ if (ops_data == NULL)
+ return -1;
+
+ dev = ops_data->dev_handle;
+ *queue_num = sfc_vdpa_adapter_by_dev_handle(dev)->max_queue_count;
+
+ sfc_vdpa_info(dev, "vDPA ops get_queue_num :: supported queue num : %u",
+ *queue_num);
+
+ return 0;
+}
+
static int
sfc_vdpa_get_features(struct rte_vdpa_device *vdpa_dev, uint64_t *features)
{
static int
sfc_vdpa_dev_config(int vid)
{
- RTE_SET_USED(vid);
+ struct rte_vdpa_device *vdpa_dev;
+ int rc;
+ struct sfc_vdpa_ops_data *ops_data;
+
+ vdpa_dev = rte_vhost_get_vdpa_device(vid);
+
+ ops_data = sfc_vdpa_get_data_by_dev(vdpa_dev);
+ if (ops_data == NULL) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "invalid vDPA device : %p, vid : %d",
+ vdpa_dev, vid);
+ return -1;
+ }
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "entry");
+
+ ops_data->vid = vid;
+
+ sfc_vdpa_adapter_lock(ops_data->dev_handle);
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "configuring");
+ rc = sfc_vdpa_configure(ops_data);
+ if (rc != 0)
+ goto fail_vdpa_config;
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "starting");
+ rc = sfc_vdpa_start(ops_data);
+ if (rc != 0)
+ goto fail_vdpa_start;
+
+ sfc_vdpa_adapter_unlock(ops_data->dev_handle);
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "vhost notifier ctrl");
+ if (rte_vhost_host_notifier_ctrl(vid, RTE_VHOST_QUEUE_ALL, true) != 0)
+ sfc_vdpa_info(ops_data->dev_handle,
+ "vDPA (%s): software relay for notify is used.",
+ vdpa_dev->device->name);
+
+ sfc_vdpa_log_init(ops_data->dev_handle, "done");
+
+ return 0;
+
+fail_vdpa_start:
+ sfc_vdpa_close(ops_data);
+
+fail_vdpa_config:
+ sfc_vdpa_adapter_unlock(ops_data->dev_handle);
return -1;
}
static int
sfc_vdpa_dev_close(int vid)
{
- RTE_SET_USED(vid);
+ struct rte_vdpa_device *vdpa_dev;
+ struct sfc_vdpa_ops_data *ops_data;
- return -1;
+ vdpa_dev = rte_vhost_get_vdpa_device(vid);
+
+ ops_data = sfc_vdpa_get_data_by_dev(vdpa_dev);
+ if (ops_data == NULL) {
+ sfc_vdpa_err(ops_data->dev_handle,
+ "invalid vDPA device : %p, vid : %d",
+ vdpa_dev, vid);
+ return -1;
+ }
+
+ sfc_vdpa_adapter_lock(ops_data->dev_handle);
+
+ sfc_vdpa_stop(ops_data);
+ sfc_vdpa_close(ops_data);
+
+ sfc_vdpa_adapter_unlock(ops_data->dev_handle);
+
+ return 0;
}
static int
git.droids-corp.org / dpdk.git / commitdiff