Add a struct irq_affinity pointer to the find_vqs methods, which if set
is used to tell the PCI layer to create the MSI-X vectors for our I/O
virtqueues with the proper affinity from the start. Compared to after
the fact affinity hints this gives us an instantly working setup and
allows to allocate the irq descritors node-local and avoid interconnect
traffic. Last but not least this will allow blk-mq queues are created
based on the interrupt affinity for storage drivers.
Signed-off-by: Christoph Hellwig <h...@lst.de>
---
drivers/block/virtio_blk.c | 3 ++-
drivers/char/virtio_console.c | 2 +-
drivers/gpu/drm/virtio/virtgpu_kms.c | 2 +-
drivers/misc/mic/vop/vop_main.c | 2 +-
drivers/net/caif/caif_virtio.c | 3 ++-
drivers/net/virtio_net.c | 2 +-
drivers/remoteproc/remoteproc_virtio.c | 3 ++-
drivers/rpmsg/virtio_rpmsg_bus.c | 2 +-
drivers/s390/virtio/kvm_virtio.c | 3 ++-
drivers/s390/virtio/virtio_ccw.c | 3 ++-
drivers/scsi/virtio_scsi.c | 3 ++-
drivers/virtio/virtio_balloon.c | 3 ++-
drivers/virtio/virtio_input.c | 3 ++-
drivers/virtio/virtio_mmio.c | 3 ++-
drivers/virtio/virtio_pci_common.c | 31 +++++++++++++++++--------------
drivers/virtio/virtio_pci_common.h | 5 ++---
drivers/virtio/virtio_pci_modern.c | 7 +++----
include/linux/virtio_config.h | 9 +++++----
net/vmw_vsock/virtio_transport.c | 3 ++-
19 files changed, 52 insertions(+), 40 deletions(-)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 5545a67..689e790 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -409,7 +409,8 @@ static int init_vq(struct virtio_blk *vblk)
}
/* Discover virtqueues and write information to configuration. */
- err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+ err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
+ NULL);
if (err)
goto out;
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 5649234..18d0681 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1939,7 +1939,7 @@ static int init_vqs(struct ports_device *portdev)
/* Find the queues. */
err = portdev->vdev->config->find_vqs(portdev->vdev, nr_queues, vqs,
io_callbacks,
- (const char **)io_names);
+ (const char **)io_names, NULL);
if (err)
goto free;
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c
b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 036b0fb..d62ad53 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -172,7 +172,7 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned
long flags)
vgdev->has_virgl_3d ? "enabled" : "not available");
ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
- callbacks, names);
+ callbacks, names, NULL);
if (ret) {
DRM_ERROR("failed to find virt queues\n");
goto err_vqs;
diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c
index 1a2b67f3..c2e29d7 100644
--- a/drivers/misc/mic/vop/vop_main.c
+++ b/drivers/misc/mic/vop/vop_main.c
@@ -374,7 +374,7 @@ static struct virtqueue *vop_find_vq(struct virtio_device
*dev,
static int vop_find_vqs(struct virtio_device *dev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[], struct irq_affinity *desc)
{
struct _vop_vdev *vdev = to_vopvdev(dev);
struct vop_device *vpdev = vdev->vpdev;
diff --git a/drivers/net/caif/caif_virtio.c b/drivers/net/caif/caif_virtio.c
index b306210..bc0eb47 100644
--- a/drivers/net/caif/caif_virtio.c
+++ b/drivers/net/caif/caif_virtio.c
@@ -679,7 +679,8 @@ static int cfv_probe(struct virtio_device *vdev)
goto err;
/* Get the TX virtio ring. This is a "guest side vring". */
- err = vdev->config->find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names);
+ err = vdev->config->find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names,
+ NULL);
if (err)
goto err;
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index fad84f3..08c9ee5 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1601,7 +1601,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi)
}
ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,
- names);
+ names, NULL);
if (ret)
goto err_find;
diff --git a/drivers/remoteproc/remoteproc_virtio.c
b/drivers/remoteproc/remoteproc_virtio.c
index 01870a1..49c73ce 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -142,7 +142,8 @@ static void rproc_virtio_del_vqs(struct virtio_device *vdev)
static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
int i, ret;
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 3090b0d..5e66e08 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -869,7 +869,7 @@ static int rpmsg_probe(struct virtio_device *vdev)
init_waitqueue_head(&vrp->sendq);
/* We expect two virtqueues, rx and tx (and in this order) */
- err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, names);
+ err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, names, NULL);
if (err)
goto free_vrp;
diff --git a/drivers/s390/virtio/kvm_virtio.c b/drivers/s390/virtio/kvm_virtio.c
index 5e5c11f..2ce0b3e 100644
--- a/drivers/s390/virtio/kvm_virtio.c
+++ b/drivers/s390/virtio/kvm_virtio.c
@@ -255,7 +255,8 @@ static void kvm_del_vqs(struct virtio_device *vdev)
static int kvm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct kvm_device *kdev = to_kvmdev(vdev);
int i;
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
index 8688ad4..8b9c3a5 100644
--- a/drivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -636,7 +636,8 @@ static int virtio_ccw_register_adapter_ind(struct
virtio_ccw_device *vcdev,
static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct virtio_ccw_device *vcdev = to_vc_device(vdev);
unsigned long *indicatorp = NULL;
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index ec91bd0..32a1629 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -932,7 +932,8 @@ static int virtscsi_init(struct virtio_device *vdev,
}
/* Discover virtqueues and write information to configuration. */
- err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+ err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
+ NULL);
if (err)
goto out;
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 181793f..36c9c8f 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -413,7 +413,8 @@ static int init_vqs(struct virtio_balloon *vb)
* optionally stat.
*/
nvqs = virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ) ? 3 : 2;
- err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names);
+ err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names,
+ NULL);
if (err)
return err;
diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 350a2a5..79f1293 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -173,7 +173,8 @@ static int virtinput_init_vqs(struct virtio_input *vi)
static const char * const names[] = { "events", "status" };
int err;
- err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names);
+ err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names,
+ NULL);
if (err)
return err;
vi->evt = vqs[0];
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 48bfea9..64c87be 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -445,7 +445,8 @@ static struct virtqueue *vm_setup_vq(struct virtio_device
*vdev, unsigned index,
static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
unsigned int irq = platform_get_irq(vm_dev->pdev, 0);
diff --git a/drivers/virtio/virtio_pci_common.c
b/drivers/virtio/virtio_pci_common.c
index 90d7975..df7164e 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -107,20 +107,25 @@ static irqreturn_t vp_interrupt(int irq, void *opaque)
return vp_vring_interrupt(irq, opaque);
}
-static int vp_setup_msix_vectors(struct virtio_device *vdev, int nvectors)
+static int vp_setup_msix_vectors(struct virtio_device *vdev, int nvectors,
+ struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
const char *name = dev_name(&vp_dev->vdev.dev);
- unsigned i;
+ unsigned flags = PCI_IRQ_MSIX, i;
int err = -ENOMEM;
+ if (desc) {
+ flags |= PCI_IRQ_AFFINITY;
+ desc->pre_vectors++; /* virtio config vector */
+ }
+
/* Try one vector per queue first. */
- err = pci_alloc_irq_vectors(vp_dev->pci_dev, nvectors, nvectors,
- PCI_IRQ_MSIX);
+ err = pci_alloc_irq_vectors_affinity(vp_dev->pci_dev, nvectors,
+ nvectors, flags, desc);
if (err < 0) {
/* Fallback to one vector for config, one shared for queues. */
- err = pci_alloc_irq_vectors(vp_dev->pci_dev, 2, 2,
- PCI_IRQ_MSIX);
+ err = pci_alloc_irq_vectors(vp_dev->pci_dev, 2, 2, flags);
if (err < 0)
goto error;
nvectors = 2;
@@ -247,9 +252,8 @@ void vp_del_vqs(struct virtio_device *vdev)
}
static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
u16 msix_vec;
@@ -265,7 +269,7 @@ static int vp_find_vqs_msix(struct virtio_device *vdev,
unsigned nvqs,
nvectors++;
}
- err = vp_setup_msix_vectors(vdev, nvectors);
+ err = vp_setup_msix_vectors(vdev, nvectors, desc);
if (err < 0)
goto error_find;
nvectors = err;
@@ -353,13 +357,12 @@ static int vp_find_vqs_intx(struct virtio_device *vdev,
unsigned nvqs,
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc)
{
int err;
- err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names);
+ err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, desc);
if (!err)
return 0;
return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names);
diff --git a/drivers/virtio/virtio_pci_common.h
b/drivers/virtio/virtio_pci_common.h
index d041cce..85010f0 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -114,9 +114,8 @@ 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 nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[]);
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc);
const char *vp_bus_name(struct virtio_device *vdev);
/* Setup the affinity for a virtqueue:
diff --git a/drivers/virtio/virtio_pci_modern.c
b/drivers/virtio/virtio_pci_modern.c
index e18d0b0..975197b 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -387,13 +387,12 @@ static struct virtqueue *setup_vq(struct
virtio_pci_device *vp_dev,
}
static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], 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);
+ int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, desc);
if (rc)
return rc;
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 26c155b..2ebe506 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -7,6 +7,8 @@
#include <linux/virtio_byteorder.h>
#include <uapi/linux/virtio_config.h>
+struct irq_affinity;
+
/**
* virtio_config_ops - operations for configuring a virtio device
* @get: read the value of a configuration field
@@ -68,9 +70,8 @@ struct virtio_config_ops {
void (*set_status)(struct virtio_device *vdev, u8 status);
void (*reset)(struct virtio_device *vdev);
int (*find_vqs)(struct virtio_device *, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[]);
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc);
void (*del_vqs)(struct virtio_device *);
u64 (*get_features)(struct virtio_device *vdev);
int (*finalize_features)(struct virtio_device *vdev);
@@ -169,7 +170,7 @@ struct virtqueue *virtio_find_single_vq(struct
virtio_device *vdev,
vq_callback_t *callbacks[] = { c };
const char *names[] = { n };
struct virtqueue *vq;
- int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names);
+ int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL);
if (err < 0)
return ERR_PTR(err);
return vq;
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 936d7ee..09906db 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -489,7 +489,8 @@ static int virtio_vsock_probe(struct virtio_device *vdev)
vsock->vdev = vdev;
ret = vsock->vdev->config->find_vqs(vsock->vdev, VSOCK_VQ_MAX,
- vsock->vqs, callbacks, names);
+ vsock->vqs, callbacks, names,
+ NULL);
if (ret < 0)
goto out;
--
2.1.4
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