Messages in this thread | | | Date | Mon, 13 Mar 2023 18:03:38 +0530 | Subject | Re: [PATCH net-next v2 08/14] sfc: implement vdpa vring config operations | From | Gautam Dawar <> |
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On 3/10/23 10:34, Jason Wang wrote: > Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding. > > > On Tue, Mar 7, 2023 at 7:37 PM Gautam Dawar <gautam.dawar@amd.com> wrote: >> This patch implements the vDPA config operations related to >> virtqueues or vrings. These include setting vring address, >> getting vq state, operations to enable/disable a vq etc. >> The resources required for vring operations eg. VI, interrupts etc. >> are also allocated. >> >> Signed-off-by: Gautam Dawar <gautam.dawar@amd.com> >> --- >> drivers/net/ethernet/sfc/ef100_vdpa.c | 46 +++- >> drivers/net/ethernet/sfc/ef100_vdpa.h | 54 +++++ >> drivers/net/ethernet/sfc/ef100_vdpa_ops.c | 275 ++++++++++++++++++++++ >> 3 files changed, 374 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa.c b/drivers/net/ethernet/sfc/ef100_vdpa.c >> index 4c5a98c9d6c3..c66e5aef69ea 100644 >> --- a/drivers/net/ethernet/sfc/ef100_vdpa.c >> +++ b/drivers/net/ethernet/sfc/ef100_vdpa.c >> @@ -14,6 +14,7 @@ >> #include "ef100_vdpa.h" >> #include "mcdi_vdpa.h" >> #include "mcdi_filters.h" >> +#include "mcdi_functions.h" >> #include "ef100_netdev.h" >> >> static struct virtio_device_id ef100_vdpa_id_table[] = { >> @@ -47,12 +48,31 @@ int ef100_vdpa_init(struct efx_probe_data *probe_data) >> return rc; >> } >> >> +static int vdpa_allocate_vis(struct efx_nic *efx, unsigned int *allocated_vis) >> +{ >> + /* The first VI is reserved for MCDI >> + * 1 VI each for rx + tx ring >> + */ >> + unsigned int max_vis = 1 + EF100_VDPA_MAX_QUEUES_PAIRS; >> + unsigned int min_vis = 1 + 1; >> + int rc; >> + >> + rc = efx_mcdi_alloc_vis(efx, min_vis, max_vis, >> + NULL, allocated_vis); >> + if (!rc) >> + return rc; >> + if (*allocated_vis < min_vis) >> + return -ENOSPC; >> + return 0; >> +} >> + >> static void ef100_vdpa_delete(struct efx_nic *efx) >> { >> if (efx->vdpa_nic) { >> /* replace with _vdpa_unregister_device later */ >> put_device(&efx->vdpa_nic->vdpa_dev.dev); >> } >> + efx_mcdi_free_vis(efx); >> } >> >> void ef100_vdpa_fini(struct efx_probe_data *probe_data) >> @@ -104,9 +124,19 @@ static struct ef100_vdpa_nic *ef100_vdpa_create(struct efx_nic *efx, >> { >> struct ef100_nic_data *nic_data = efx->nic_data; >> struct ef100_vdpa_nic *vdpa_nic; >> + unsigned int allocated_vis; >> int rc; >> + u8 i; >> >> nic_data->vdpa_class = dev_type; >> + rc = vdpa_allocate_vis(efx, &allocated_vis); >> + if (rc) { >> + pci_err(efx->pci_dev, >> + "%s Alloc VIs failed for vf:%u error:%d\n", >> + __func__, nic_data->vf_index, rc); >> + return ERR_PTR(rc); >> + } >> + >> vdpa_nic = vdpa_alloc_device(struct ef100_vdpa_nic, >> vdpa_dev, &efx->pci_dev->dev, >> &ef100_vdpa_config_ops, >> @@ -117,7 +147,8 @@ static struct ef100_vdpa_nic *ef100_vdpa_create(struct efx_nic *efx, >> "vDPA device allocation failed for vf: %u\n", >> nic_data->vf_index); >> nic_data->vdpa_class = EF100_VDPA_CLASS_NONE; >> - return ERR_PTR(-ENOMEM); >> + rc = -ENOMEM; >> + goto err_alloc_vis_free; >> } >> >> mutex_init(&vdpa_nic->lock); >> @@ -125,11 +156,21 @@ static struct ef100_vdpa_nic *ef100_vdpa_create(struct efx_nic *efx, >> vdpa_nic->vdpa_dev.dma_dev = &efx->pci_dev->dev; >> vdpa_nic->vdpa_dev.mdev = efx->mgmt_dev; >> vdpa_nic->efx = efx; >> + vdpa_nic->max_queue_pairs = allocated_vis - 1; >> vdpa_nic->pf_index = nic_data->pf_index; >> vdpa_nic->vf_index = nic_data->vf_index; >> vdpa_nic->vdpa_state = EF100_VDPA_STATE_INITIALIZED; >> vdpa_nic->mac_address = (u8 *)&vdpa_nic->net_config.mac; >> >> + for (i = 0; i < (2 * vdpa_nic->max_queue_pairs); i++) { >> + rc = ef100_vdpa_init_vring(vdpa_nic, i); >> + if (rc) { >> + pci_err(efx->pci_dev, >> + "vring init idx: %u failed, rc: %d\n", i, rc); >> + goto err_put_device; >> + } >> + } >> + >> rc = get_net_config(vdpa_nic); >> if (rc) >> goto err_put_device; >> @@ -146,6 +187,9 @@ static struct ef100_vdpa_nic *ef100_vdpa_create(struct efx_nic *efx, >> err_put_device: >> /* put_device invokes ef100_vdpa_free */ >> put_device(&vdpa_nic->vdpa_dev.dev); >> + >> +err_alloc_vis_free: >> + efx_mcdi_free_vis(efx); >> return ERR_PTR(rc); >> } >> >> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa.h b/drivers/net/ethernet/sfc/ef100_vdpa.h >> index dcf4a8156415..348ca8a7404b 100644 >> --- a/drivers/net/ethernet/sfc/ef100_vdpa.h >> +++ b/drivers/net/ethernet/sfc/ef100_vdpa.h >> @@ -32,6 +32,21 @@ >> /* Alignment requirement of the Virtqueue */ >> #define EF100_VDPA_VQ_ALIGN 4096 >> >> +/* Vring configuration definitions */ >> +#define EF100_VRING_ADDRESS_CONFIGURED 0x1 >> +#define EF100_VRING_SIZE_CONFIGURED 0x10 >> +#define EF100_VRING_READY_CONFIGURED 0x100 >> +#define EF100_VRING_CONFIGURED (EF100_VRING_ADDRESS_CONFIGURED | \ >> + EF100_VRING_SIZE_CONFIGURED | \ >> + EF100_VRING_READY_CONFIGURED) >> +#define EF100_VRING_CREATED 0x1000 >> + >> +/* Maximum size of msix name */ >> +#define EF100_VDPA_MAX_MSIX_NAME_SIZE 256 >> + >> +/* Default high IOVA for MCDI buffer */ >> +#define EF100_VDPA_IOVA_BASE_ADDR 0x20000000000 >> + >> /** >> * enum ef100_vdpa_nic_state - possible states for a vDPA NIC >> * >> @@ -57,6 +72,41 @@ enum ef100_vdpa_vq_type { >> EF100_VDPA_VQ_NTYPES >> }; >> >> +/** >> + * struct ef100_vdpa_vring_info - vDPA vring data structure >> + * >> + * @desc: Descriptor area address of the vring >> + * @avail: Available area address of the vring >> + * @used: Device area address of the vring >> + * @size: Number of entries in the vring >> + * @vring_state: bit map to track vring configuration >> + * @last_avail_idx: last available index of the vring >> + * @last_used_idx: last used index of the vring >> + * @doorbell_offset: doorbell offset >> + * @doorbell_offset_valid: true if @doorbell_offset is updated >> + * @vring_type: type of vring created >> + * @vring_ctx: vring context information >> + * @msix_name: device name for vring irq handler >> + * @irq: irq number for vring irq handler >> + * @cb: callback for vring interrupts >> + */ >> +struct ef100_vdpa_vring_info { >> + dma_addr_t desc; >> + dma_addr_t avail; >> + dma_addr_t used; >> + u32 size; >> + u16 vring_state; >> + u32 last_avail_idx; >> + u32 last_used_idx; >> + u32 doorbell_offset; >> + bool doorbell_offset_valid; >> + enum ef100_vdpa_vq_type vring_type; >> + struct efx_vring_ctx *vring_ctx; >> + char msix_name[EF100_VDPA_MAX_MSIX_NAME_SIZE]; >> + u32 irq; >> + struct vdpa_callback cb; >> +}; >> + >> /** >> * struct ef100_vdpa_nic - vDPA NIC data structure >> * >> @@ -70,6 +120,7 @@ enum ef100_vdpa_vq_type { >> * @features: negotiated feature bits >> * @max_queue_pairs: maximum number of queue pairs supported >> * @net_config: virtio_net_config data >> + * @vring: vring information of the vDPA device. >> * @mac_address: mac address of interface associated with this vdpa device >> * @mac_configured: true after MAC address is configured >> * @cfg_cb: callback for config change >> @@ -86,6 +137,7 @@ struct ef100_vdpa_nic { >> u64 features; >> u32 max_queue_pairs; >> struct virtio_net_config net_config; >> + struct ef100_vdpa_vring_info vring[EF100_VDPA_MAX_QUEUES_PAIRS * 2]; >> u8 *mac_address; >> bool mac_configured; >> struct vdpa_callback cfg_cb; >> @@ -95,6 +147,8 @@ int ef100_vdpa_init(struct efx_probe_data *probe_data); >> void ef100_vdpa_fini(struct efx_probe_data *probe_data); >> int ef100_vdpa_register_mgmtdev(struct efx_nic *efx); >> void ef100_vdpa_unregister_mgmtdev(struct efx_nic *efx); >> +void ef100_vdpa_irq_vectors_free(void *data); >> +int ef100_vdpa_init_vring(struct ef100_vdpa_nic *vdpa_nic, u16 idx); >> >> static inline bool efx_vdpa_is_little_endian(struct ef100_vdpa_nic *vdpa_nic) >> { >> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa_ops.c b/drivers/net/ethernet/sfc/ef100_vdpa_ops.c >> index a2364ef9f492..0051c4c0e47c 100644 >> --- a/drivers/net/ethernet/sfc/ef100_vdpa_ops.c >> +++ b/drivers/net/ethernet/sfc/ef100_vdpa_ops.c >> @@ -9,13 +9,270 @@ >> >> #include <linux/vdpa.h> >> #include "ef100_vdpa.h" >> +#include "io.h" >> #include "mcdi_vdpa.h" >> >> +/* Get the queue's function-local index of the associated VI >> + * virtqueue number queue 0 is reserved for MCDI >> + */ >> +#define EFX_GET_VI_INDEX(vq_num) (((vq_num) / 2) + 1) >> + >> static struct ef100_vdpa_nic *get_vdpa_nic(struct vdpa_device *vdev) >> { >> return container_of(vdev, struct ef100_vdpa_nic, vdpa_dev); >> } >> >> +void ef100_vdpa_irq_vectors_free(void *data) >> +{ >> + pci_free_irq_vectors(data); >> +} >> + >> +static int create_vring_ctx(struct ef100_vdpa_nic *vdpa_nic, u16 idx) >> +{ >> + struct efx_vring_ctx *vring_ctx; >> + u32 vi_index; >> + >> + if (idx % 2) /* Even VQ for RX and odd for TX */ >> + vdpa_nic->vring[idx].vring_type = EF100_VDPA_VQ_TYPE_NET_TXQ; >> + else >> + vdpa_nic->vring[idx].vring_type = EF100_VDPA_VQ_TYPE_NET_RXQ; >> + vi_index = EFX_GET_VI_INDEX(idx); >> + vring_ctx = efx_vdpa_vring_init(vdpa_nic->efx, vi_index, >> + vdpa_nic->vring[idx].vring_type); >> + if (IS_ERR(vring_ctx)) >> + return PTR_ERR(vring_ctx); >> + >> + vdpa_nic->vring[idx].vring_ctx = vring_ctx; >> + return 0; >> +} >> + >> +static void delete_vring_ctx(struct ef100_vdpa_nic *vdpa_nic, u16 idx) >> +{ >> + efx_vdpa_vring_fini(vdpa_nic->vring[idx].vring_ctx); >> + vdpa_nic->vring[idx].vring_ctx = NULL; >> +} >> + >> +static void reset_vring(struct ef100_vdpa_nic *vdpa_nic, u16 idx) >> +{ >> + vdpa_nic->vring[idx].vring_type = EF100_VDPA_VQ_NTYPES; >> + vdpa_nic->vring[idx].vring_state = 0; >> + vdpa_nic->vring[idx].last_avail_idx = 0; >> + vdpa_nic->vring[idx].last_used_idx = 0; >> +} >> + >> +int ef100_vdpa_init_vring(struct ef100_vdpa_nic *vdpa_nic, u16 idx) >> +{ >> + u32 offset; >> + int rc; >> + >> + vdpa_nic->vring[idx].irq = -EINVAL; >> + rc = create_vring_ctx(vdpa_nic, idx); >> + if (rc) { >> + dev_err(&vdpa_nic->vdpa_dev.dev, >> + "%s: create_vring_ctx failed, idx:%u, err:%d\n", >> + __func__, idx, rc); >> + return rc; >> + } >> + >> + rc = efx_vdpa_get_doorbell_offset(vdpa_nic->vring[idx].vring_ctx, >> + &offset); >> + if (rc) { >> + dev_err(&vdpa_nic->vdpa_dev.dev, >> + "%s: get_doorbell failed idx:%u, err:%d\n", >> + __func__, idx, rc); >> + goto err_get_doorbell_offset; >> + } >> + vdpa_nic->vring[idx].doorbell_offset = offset; >> + vdpa_nic->vring[idx].doorbell_offset_valid = true; >> + >> + return 0; >> + >> +err_get_doorbell_offset: >> + delete_vring_ctx(vdpa_nic, idx); >> + return rc; >> +} >> + >> +static bool is_qid_invalid(struct ef100_vdpa_nic *vdpa_nic, u16 idx, >> + const char *caller) >> +{ >> + if (unlikely(idx >= (vdpa_nic->max_queue_pairs * 2))) { >> + dev_err(&vdpa_nic->vdpa_dev.dev, >> + "%s: Invalid qid %u\n", caller, idx); >> + return true; >> + } >> + return false; >> +} >> + >> +static int ef100_vdpa_set_vq_address(struct vdpa_device *vdev, >> + u16 idx, u64 desc_area, u64 driver_area, >> + u64 device_area) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return -EINVAL; >> + >> + mutex_lock(&vdpa_nic->lock); >> + vdpa_nic->vring[idx].desc = desc_area; >> + vdpa_nic->vring[idx].avail = driver_area; >> + vdpa_nic->vring[idx].used = device_area; >> + vdpa_nic->vring[idx].vring_state |= EF100_VRING_ADDRESS_CONFIGURED; >> + mutex_unlock(&vdpa_nic->lock); >> + return 0; >> +} >> + >> +static void ef100_vdpa_set_vq_num(struct vdpa_device *vdev, u16 idx, u32 num) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return; >> + >> + if (!is_power_of_2(num)) { >> + dev_err(&vdev->dev, "%s: Index:%u size:%u not power of 2\n", >> + __func__, idx, num); >> + return; >> + } > Note that this is not a requirement for packed virtqueue. > > """ > Queue Size corresponds to the maximum number of descriptors in the > virtqueue5. The Queue Size value does not have to be a power of 2. > """ Yes, but we are using split vrings and virtio spec states "Queue Size value is always a power of 2" for Split virtqueues. > >> + if (num > EF100_VDPA_VQ_NUM_MAX_SIZE) { >> + dev_err(&vdev->dev, "%s: Index:%u size:%u more than max:%u\n", >> + __func__, idx, num, EF100_VDPA_VQ_NUM_MAX_SIZE); >> + return; >> + } >> + mutex_lock(&vdpa_nic->lock); >> + vdpa_nic->vring[idx].size = num; >> + vdpa_nic->vring[idx].vring_state |= EF100_VRING_SIZE_CONFIGURED; >> + mutex_unlock(&vdpa_nic->lock); >> +} >> + >> +static void ef100_vdpa_kick_vq(struct vdpa_device *vdev, u16 idx) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + u32 idx_val; >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return; >> + >> + if (!(vdpa_nic->vring[idx].vring_state & EF100_VRING_CREATED)) >> + return; > In which case could we hit this condition? I've noticed this condition in regular testing with vhost-vdpa. The first couple of kick_vq calls arrive when the HW queues aren't created yet. .I think userspace assumes queues to be ready soon after sending DRIVER_OK. However, there is a little time window between that and when the HW VQs are actually ready for datapath. > >> + >> + idx_val = idx; >> + _efx_writed(vdpa_nic->efx, cpu_to_le32(idx_val), >> + vdpa_nic->vring[idx].doorbell_offset); >> +} >> + >> +static void ef100_vdpa_set_vq_cb(struct vdpa_device *vdev, u16 idx, >> + struct vdpa_callback *cb) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return; >> + >> + if (cb) >> + vdpa_nic->vring[idx].cb = *cb; >> +} >> + >> +static void ef100_vdpa_set_vq_ready(struct vdpa_device *vdev, u16 idx, >> + bool ready) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return; >> + >> + mutex_lock(&vdpa_nic->lock); >> + if (ready) { >> + vdpa_nic->vring[idx].vring_state |= >> + EF100_VRING_READY_CONFIGURED; > I think it would be sufficient to have EF100_VRING_READY_CONFIGURED > here. With this set, the device can think the vq configuration is done > by the driver. > > Or is there anything special for size and num? The virtqueue is considered ready for datapath when it is fully configured (both size and address set and enabled with set_vq_ready). Depending on merely the queue enable (EF100_VRING_READY_CONFIGURED) would assume valid values for vq size and addresses, which we wish to avoid. > > Thanks > > >> + } else { >> + vdpa_nic->vring[idx].vring_state &= >> + ~EF100_VRING_READY_CONFIGURED; >> + } >> + mutex_unlock(&vdpa_nic->lock); >> +} >> + >> +static bool ef100_vdpa_get_vq_ready(struct vdpa_device *vdev, u16 idx) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + bool ready; >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return false; >> + >> + mutex_lock(&vdpa_nic->lock); >> + ready = vdpa_nic->vring[idx].vring_state & EF100_VRING_READY_CONFIGURED; >> + mutex_unlock(&vdpa_nic->lock); >> + return ready; >> +} >> + >> +static int ef100_vdpa_set_vq_state(struct vdpa_device *vdev, u16 idx, >> + const struct vdpa_vq_state *state) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return -EINVAL; >> + >> + mutex_lock(&vdpa_nic->lock); >> + vdpa_nic->vring[idx].last_avail_idx = state->split.avail_index; >> + vdpa_nic->vring[idx].last_used_idx = state->split.avail_index; >> + mutex_unlock(&vdpa_nic->lock); >> + return 0; >> +} >> + >> +static int ef100_vdpa_get_vq_state(struct vdpa_device *vdev, >> + u16 idx, struct vdpa_vq_state *state) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return -EINVAL; >> + >> + mutex_lock(&vdpa_nic->lock); >> + state->split.avail_index = (u16)vdpa_nic->vring[idx].last_used_idx; >> + mutex_unlock(&vdpa_nic->lock); >> + >> + return 0; >> +} >> + >> +static struct vdpa_notification_area >> + ef100_vdpa_get_vq_notification(struct vdpa_device *vdev, >> + u16 idx) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + struct vdpa_notification_area notify_area = {0, 0}; >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + goto end; >> + >> + mutex_lock(&vdpa_nic->lock); >> + notify_area.addr = (uintptr_t)(vdpa_nic->efx->membase_phys + >> + vdpa_nic->vring[idx].doorbell_offset); >> + /* VDPA doorbells are at a stride of VI/2 >> + * One VI stride is shared by both rx & tx doorbells >> + */ >> + notify_area.size = vdpa_nic->efx->vi_stride / 2; >> + mutex_unlock(&vdpa_nic->lock); >> + >> +end: >> + return notify_area; >> +} >> + >> +static int ef100_get_vq_irq(struct vdpa_device *vdev, u16 idx) >> +{ >> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + u32 irq; >> + >> + if (is_qid_invalid(vdpa_nic, idx, __func__)) >> + return -EINVAL; >> + >> + mutex_lock(&vdpa_nic->lock); >> + irq = vdpa_nic->vring[idx].irq; >> + mutex_unlock(&vdpa_nic->lock); >> + >> + return irq; >> +} >> + >> static u32 ef100_vdpa_get_vq_align(struct vdpa_device *vdev) >> { >> return EF100_VDPA_VQ_ALIGN; >> @@ -80,6 +337,8 @@ static void ef100_vdpa_set_config_cb(struct vdpa_device *vdev, >> >> if (cb) >> vdpa_nic->cfg_cb = *cb; >> + else >> + memset(&vdpa_nic->cfg_cb, 0, sizeof(vdpa_nic->cfg_cb)); >> } >> >> static u16 ef100_vdpa_get_vq_num_max(struct vdpa_device *vdev) >> @@ -137,14 +396,30 @@ static void ef100_vdpa_set_config(struct vdpa_device *vdev, unsigned int offset, >> static void ef100_vdpa_free(struct vdpa_device *vdev) >> { >> struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev); >> + int i; >> >> if (vdpa_nic) { >> + for (i = 0; i < (vdpa_nic->max_queue_pairs * 2); i++) { >> + reset_vring(vdpa_nic, i); >> + if (vdpa_nic->vring[i].vring_ctx) >> + delete_vring_ctx(vdpa_nic, i); >> + } >> mutex_destroy(&vdpa_nic->lock); >> vdpa_nic->efx->vdpa_nic = NULL; >> } >> } >> >> const struct vdpa_config_ops ef100_vdpa_config_ops = { >> + .set_vq_address = ef100_vdpa_set_vq_address, >> + .set_vq_num = ef100_vdpa_set_vq_num, >> + .kick_vq = ef100_vdpa_kick_vq, >> + .set_vq_cb = ef100_vdpa_set_vq_cb, >> + .set_vq_ready = ef100_vdpa_set_vq_ready, >> + .get_vq_ready = ef100_vdpa_get_vq_ready, >> + .set_vq_state = ef100_vdpa_set_vq_state, >> + .get_vq_state = ef100_vdpa_get_vq_state, >> + .get_vq_notification = ef100_vdpa_get_vq_notification, >> + .get_vq_irq = ef100_get_vq_irq, >> .get_vq_align = ef100_vdpa_get_vq_align, >> .get_device_features = ef100_vdpa_get_device_features, >> .set_driver_features = ef100_vdpa_set_driver_features, >> -- >> 2.30.1 >>
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