diff options
| -rw-r--r-- | drivers/virtio/virtio_pci_common.c | 69 | ||||
| -rw-r--r-- | drivers/virtio/virtio_pci_common.h | 5 | ||||
| -rw-r--r-- | drivers/virtio/virtio_pci_legacy.c | 75 |
3 files changed, 77 insertions, 72 deletions
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 9756f21b809e..457cbe29c8c4 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -464,15 +464,80 @@ static const struct pci_device_id virtio_pci_id_table[] = { MODULE_DEVICE_TABLE(pci, virtio_pci_id_table); +static void virtio_pci_release_dev(struct device *_d) +{ + struct virtio_device *vdev = dev_to_virtio(_d); + struct virtio_pci_device *vp_dev = to_vp_device(vdev); + + /* As struct device is a kobject, it's not safe to + * free the memory (including the reference counter itself) + * until it's release callback. */ + kfree(vp_dev); +} + static int virtio_pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) { - return virtio_pci_legacy_probe(pci_dev, id); + struct virtio_pci_device *vp_dev; + int rc; + + /* allocate our structure and fill it out */ + vp_dev = kzalloc(sizeof(struct virtio_pci_device), GFP_KERNEL); + if (!vp_dev) + return -ENOMEM; + + pci_set_drvdata(pci_dev, vp_dev); + vp_dev->vdev.dev.parent = &pci_dev->dev; + vp_dev->vdev.dev.release = virtio_pci_release_dev; + vp_dev->pci_dev = pci_dev; + INIT_LIST_HEAD(&vp_dev->virtqueues); + spin_lock_init(&vp_dev->lock); + + /* Disable MSI/MSIX to bring device to a known good state. */ + pci_msi_off(pci_dev); + + /* enable the device */ + rc = pci_enable_device(pci_dev); + if (rc) + goto err_enable_device; + + rc = pci_request_regions(pci_dev, "virtio-pci"); + if (rc) + goto err_request_regions; + + rc = virtio_pci_legacy_probe(vp_dev); + if (rc) + goto err_probe; + + pci_set_master(pci_dev); + + rc = register_virtio_device(&vp_dev->vdev); + if (rc) + goto err_register; + + return 0; + +err_register: + virtio_pci_legacy_remove(vp_dev); +err_probe: + pci_release_regions(pci_dev); +err_request_regions: + pci_disable_device(pci_dev); +err_enable_device: + kfree(vp_dev); + return rc; } static void virtio_pci_remove(struct pci_dev *pci_dev) { - virtio_pci_legacy_remove(pci_dev); + struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev); + + unregister_virtio_device(&vp_dev->vdev); + + virtio_pci_legacy_remove(pci_dev); + + pci_release_regions(pci_dev); + pci_disable_device(pci_dev); } static struct pci_driver virtio_pci_driver = { diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index 5a497289b7e9..2b1e70db44a0 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -127,8 +127,7 @@ const char *vp_bus_name(struct virtio_device *vdev); */ int vp_set_vq_affinity(struct virtqueue *vq, int cpu); -int virtio_pci_legacy_probe(struct pci_dev *pci_dev, - const struct pci_device_id *id); -void virtio_pci_legacy_remove(struct pci_dev *pci_dev); +int virtio_pci_legacy_probe(struct virtio_pci_device *); +void virtio_pci_legacy_remove(struct virtio_pci_device *); #endif diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c index 19f93096739a..256a5278a515 100644 --- a/drivers/virtio/virtio_pci_legacy.c +++ b/drivers/virtio/virtio_pci_legacy.c @@ -211,23 +211,10 @@ static const struct virtio_config_ops virtio_pci_config_ops = { .set_vq_affinity = vp_set_vq_affinity, }; -static void virtio_pci_release_dev(struct device *_d) -{ - struct virtio_device *vdev = dev_to_virtio(_d); - struct virtio_pci_device *vp_dev = to_vp_device(vdev); - - /* As struct device is a kobject, it's not safe to - * free the memory (including the reference counter itself) - * until it's release callback. */ - kfree(vp_dev); -} - /* the PCI probing function */ -int virtio_pci_legacy_probe(struct pci_dev *pci_dev, - const struct pci_device_id *id) +int virtio_pci_legacy_probe(struct virtio_pci_device *vp_dev) { - struct virtio_pci_device *vp_dev; - int err; + struct pci_dev *pci_dev = vp_dev->pci_dev; /* We only own devices >= 0x1000 and <= 0x103f: leave the rest. */ if (pci_dev->device < 0x1000 || pci_dev->device > 0x103f) @@ -239,41 +226,12 @@ int virtio_pci_legacy_probe(struct pci_dev *pci_dev, return -ENODEV; } - /* allocate our structure and fill it out */ - vp_dev = kzalloc(sizeof(struct virtio_pci_device), GFP_KERNEL); - if (vp_dev == NULL) - return -ENOMEM; - - vp_dev->vdev.dev.parent = &pci_dev->dev; - vp_dev->vdev.dev.release = virtio_pci_release_dev; - vp_dev->vdev.config = &virtio_pci_config_ops; - vp_dev->pci_dev = pci_dev; - INIT_LIST_HEAD(&vp_dev->virtqueues); - spin_lock_init(&vp_dev->lock); - - /* Disable MSI/MSIX to bring device to a known good state. */ - pci_msi_off(pci_dev); - - /* enable the device */ - err = pci_enable_device(pci_dev); - if (err) - goto out; - - err = pci_request_regions(pci_dev, "virtio-pci"); - if (err) - goto out_enable_device; - vp_dev->ioaddr = pci_iomap(pci_dev, 0, 0); - if (vp_dev->ioaddr == NULL) { - err = -ENOMEM; - goto out_req_regions; - } + if (!vp_dev->ioaddr) + return -ENOMEM; vp_dev->isr = vp_dev->ioaddr + VIRTIO_PCI_ISR; - pci_set_drvdata(pci_dev, vp_dev); - pci_set_master(pci_dev); - /* we use the subsystem vendor/device id as the virtio vendor/device * id. this allows us to use the same PCI vendor/device id for all * virtio devices and to identify the particular virtio driver by @@ -281,35 +239,18 @@ int virtio_pci_legacy_probe(struct pci_dev *pci_dev, vp_dev->vdev.id.vendor = pci_dev->subsystem_vendor; vp_dev->vdev.id.device = pci_dev->subsystem_device; + vp_dev->vdev.config = &virtio_pci_config_ops; + vp_dev->config_vector = vp_config_vector; vp_dev->setup_vq = setup_vq; vp_dev->del_vq = del_vq; - /* finally register the virtio device */ - err = register_virtio_device(&vp_dev->vdev); - if (err) - goto out_set_drvdata; - return 0; - -out_set_drvdata: - pci_iounmap(pci_dev, vp_dev->ioaddr); -out_req_regions: - pci_release_regions(pci_dev); -out_enable_device: - pci_disable_device(pci_dev); -out: - kfree(vp_dev); - return err; } -void virtio_pci_legacy_remove(struct pci_dev *pci_dev) +void virtio_pci_legacy_remove(struct virtio_pci_device *vp_dev) { - struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev); - - unregister_virtio_device(&vp_dev->vdev); + struct pci_dev *pci_dev = vp_dev->pci_dev; pci_iounmap(pci_dev, vp_dev->ioaddr); - pci_release_regions(pci_dev); - pci_disable_device(pci_dev); } |