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virtio_pci: convert vp_*find_vqs() ops to find_vqs_info()

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Convert existing vp_find_vqs() and vp_modern_find_vqs() implementations
to find_vqs_info() config op.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Message-Id: <20240708074814.1739223-6-jiri@resnulli.us>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jiri Pirko 2024-07-08 09:48:00 +02:00 committed by Michael S. Tsirkin
parent c502eb85c3
commit ad9a12576b
4 changed files with 32 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
drivers/virtio/virtio_pci_common.c
View File

@ -285,12 +285,13 @@ void vp_del_vqs(struct virtio_device *vdev)
}
static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], bool per_vq_vectors,
const bool *ctx,
struct irq_affinity *desc)
struct virtqueue *vqs[],
struct virtqueue_info vqs_info[],
bool per_vq_vectors,
struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
struct virtqueue_info *vqi;
u16 msix_vec;
int i, err, nvectors, allocated_vectors, queue_idx = 0;
@ -301,9 +302,11 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
if (per_vq_vectors) {
/* Best option: one for change interrupt, one per vq. */
nvectors = 1;
for (i = 0; i < nvqs; ++i)
if (names[i] && callbacks[i])
for (i = 0; i < nvqs; ++i) {
vqi = &vqs_info[i];
if (vqi->name && vqi->callback)
++nvectors;
}
} else {
/* Second best: one for change, shared for all vqs. */
nvectors = 2;
@ -317,20 +320,20 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
vp_dev->per_vq_vectors = per_vq_vectors;
allocated_vectors = vp_dev->msix_used_vectors;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
vqi = &vqs_info[i];
if (!vqi->name) {
vqs[i] = NULL;
continue;
}
if (!callbacks[i])
if (!vqi->callback)
msix_vec = VIRTIO_MSI_NO_VECTOR;
else if (vp_dev->per_vq_vectors)
msix_vec = allocated_vectors++;
else
msix_vec = VP_MSIX_VQ_VECTOR;
vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
ctx ? ctx[i] : false,
msix_vec);
vqs[i] = vp_setup_vq(vdev, queue_idx++, vqi->callback,
vqi->name, vqi->ctx, msix_vec);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
goto error_find;
@ -343,7 +346,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
snprintf(vp_dev->msix_names[msix_vec],
sizeof *vp_dev->msix_names,
"%s-%s",
dev_name(&vp_dev->vdev.dev), names[i]);
dev_name(&vp_dev->vdev.dev), vqi->name);
err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec),
vring_interrupt, 0,
vp_dev->msix_names[msix_vec],
@ -361,8 +364,8 @@ error_find:
}
static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], const bool *ctx)
struct virtqueue *vqs[],
struct virtqueue_info vqs_info[])
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
int i, err, queue_idx = 0;
@ -379,12 +382,14 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
vp_dev->intx_enabled = 1;
vp_dev->per_vq_vectors = false;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
struct virtqueue_info *vqi = &vqs_info[i];
if (!vqi->name) {
vqs[i] = NULL;
continue;
}
vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
ctx ? ctx[i] : false,
vqs[i] = vp_setup_vq(vdev, queue_idx++, vqi->callback,
vqi->name, vqi->ctx,
VIRTIO_MSI_NO_VECTOR);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
@ -400,25 +405,24 @@ out_del_vqs:
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], const bool *ctx,
struct virtqueue *vqs[], struct virtqueue_info vqs_info[],
struct irq_affinity *desc)
{
int err;
/* Try MSI-X with one vector per queue. */
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true, ctx, desc);
err = vp_find_vqs_msix(vdev, nvqs, vqs, vqs_info, true, desc);
if (!err)
return 0;
/* Fallback: MSI-X with one vector for config, one shared for queues. */
err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false, ctx, desc);
err = vp_find_vqs_msix(vdev, nvqs, vqs, vqs_info, false, desc);
if (!err)
return 0;
/* Is there an interrupt? If not give up. */
if (!(to_vp_device(vdev)->pci_dev->irq))
return err;
/* Finally fall back to regular interrupts. */
return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, ctx);
return vp_find_vqs_intx(vdev, nvqs, vqs, vqs_info);
}
const char *vp_bus_name(struct virtio_device *vdev)

3
drivers/virtio/virtio_pci_common.h
View File

@ -127,8 +127,7 @@ bool vp_notify(struct virtqueue *vq);
void vp_del_vqs(struct virtio_device *vdev);
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[], vq_callback_t *callbacks[],
const char * const names[], const bool *ctx,
struct virtqueue *vqs[], struct virtqueue_info vqs_info[],
struct irq_affinity *desc);
const char *vp_bus_name(struct virtio_device *vdev);

2
drivers/virtio/virtio_pci_legacy.c
View File

@ -192,7 +192,7 @@ static const struct virtio_config_ops virtio_pci_config_ops = {
.get_status = vp_get_status,
.set_status = vp_set_status,
.reset = vp_reset,
.find_vqs = vp_find_vqs,
.find_vqs_info = vp_find_vqs,
.del_vqs = vp_del_vqs,
.synchronize_cbs = vp_synchronize_vectors,
.get_features = vp_get_features,

9
drivers/virtio/virtio_pci_modern.c
View File

@ -595,13 +595,12 @@ err:
static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
const char * const names[], const bool *ctx,
struct virtqueue_info vqs_info[],
struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
struct virtqueue *vq;
int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, desc);
int rc = vp_find_vqs(vdev, nvqs, vqs, vqs_info, desc);
if (rc)
return rc;
@ -782,7 +781,7 @@ static const struct virtio_config_ops virtio_pci_config_nodev_ops = {
.get_status = vp_get_status,
.set_status = vp_set_status,
.reset = vp_reset,
.find_vqs = vp_modern_find_vqs,
.find_vqs_info = vp_modern_find_vqs,
.del_vqs = vp_del_vqs,
.synchronize_cbs = vp_synchronize_vectors,
.get_features = vp_get_features,
@ -804,7 +803,7 @@ static const struct virtio_config_ops virtio_pci_config_ops = {
.get_status = vp_get_status,
.set_status = vp_set_status,
.reset = vp_reset,
.find_vqs = vp_modern_find_vqs,
.find_vqs_info = vp_modern_find_vqs,
.del_vqs = vp_del_vqs,
.synchronize_cbs = vp_synchronize_vectors,
.get_features = vp_get_features,