diff options
Diffstat (limited to 'drivers/virtio/virtio_pci_common.h')
| -rw-r--r-- | drivers/virtio/virtio_pci_common.h | 93 |
1 files changed, 75 insertions, 18 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h index 23f6c5c678d5..8cd01de27baf 100644 --- a/drivers/virtio/virtio_pci_common.h +++ b/drivers/virtio/virtio_pci_common.h @@ -29,56 +29,78 @@ #include <linux/virtio_pci_modern.h> #include <linux/highmem.h> #include <linux/spinlock.h> +#include <linux/mutex.h> struct virtio_pci_vq_info { /* the actual virtqueue */ struct virtqueue *vq; - /* the list node for the virtqueues list */ + /* the list node for the virtqueues or slow_virtqueues list */ struct list_head node; /* MSI-X vector (or none) */ - unsigned msix_vector; + unsigned int msix_vector; +}; + +struct virtio_pci_admin_vq { + /* Virtqueue info associated with this admin queue. */ + struct virtio_pci_vq_info *info; + /* Protects virtqueue access. */ + spinlock_t lock; + u64 supported_cmds; + u64 supported_caps; + u8 max_dev_parts_objects; + struct ida dev_parts_ida; + /* Name of the admin queue: avq.$vq_index. */ + char name[10]; + u16 vq_index; }; /* Our device structure */ struct virtio_pci_device { struct virtio_device vdev; struct pci_dev *pci_dev; - struct virtio_pci_legacy_device ldev; - struct virtio_pci_modern_device mdev; - + union { + struct virtio_pci_legacy_device ldev; + struct virtio_pci_modern_device mdev; + }; bool is_legacy; /* Where to read and clear interrupt */ u8 __iomem *isr; - /* a list of queues so we can dispatch IRQs */ + /* Lists of queues and potentially slow path queues + * so we can dispatch IRQs. + */ spinlock_t lock; struct list_head virtqueues; + struct list_head slow_virtqueues; - /* array of all queues for house-keeping */ + /* Array of all virtqueues reported in the + * PCI common config num_queues field + */ struct virtio_pci_vq_info **vqs; + struct virtio_pci_admin_vq admin_vq; + /* MSI-X support */ int msix_enabled; int intx_enabled; - bool intx_soft_enabled; cpumask_var_t *msix_affinity_masks; /* Name strings for interrupts. This size should be enough, * and I'm too lazy to allocate each name separately. */ char (*msix_names)[256]; /* Number of available vectors */ - unsigned msix_vectors; + unsigned int msix_vectors; /* Vectors allocated, excluding per-vq vectors if any */ - unsigned msix_used_vectors; + unsigned int msix_used_vectors; /* Whether we have vector per vq */ bool per_vq_vectors; struct virtqueue *(*setup_vq)(struct virtio_pci_device *vp_dev, struct virtio_pci_vq_info *info, - unsigned idx, + unsigned int idx, void (*callback)(struct virtqueue *vq), const char *name, bool ctx, @@ -86,6 +108,7 @@ struct virtio_pci_device { void (*del_vq)(struct virtio_pci_vq_info *info); u16 (*config_vector)(struct virtio_pci_device *vp_dev, u16 vector); + int (*avq_index)(struct virtio_device *vdev, u16 *index, u16 *num); }; /* Constants for MSI-X */ @@ -102,18 +125,15 @@ static struct virtio_pci_device *to_vp_device(struct virtio_device *vdev) return container_of(vdev, struct virtio_pci_device, vdev); } -/* disable irq handlers */ -void vp_disable_cbs(struct virtio_device *vdev); -/* enable irq handlers */ -void vp_enable_cbs(struct virtio_device *vdev); +/* wait for pending irq handlers */ +void vp_synchronize_vectors(struct virtio_device *vdev); /* the notify function used when creating a virt queue */ bool vp_notify(struct virtqueue *vq); /* the config->del_vqs() implementation */ 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[], const bool *ctx, +int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs, + struct virtqueue *vqs[], struct virtqueue_info vqs_info[], struct irq_affinity *desc); const char *vp_bus_name(struct virtio_device *vdev); @@ -141,4 +161,41 @@ static inline void virtio_pci_legacy_remove(struct virtio_pci_device *vp_dev) int virtio_pci_modern_probe(struct virtio_pci_device *); void virtio_pci_modern_remove(struct virtio_pci_device *); +struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev); + +#define VIRTIO_LEGACY_ADMIN_CMD_BITMAP \ + (BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_COMMON_CFG_WRITE) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_COMMON_CFG_READ) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_DEV_CFG_WRITE) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_DEV_CFG_READ) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_LEGACY_NOTIFY_INFO)) + +#define VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP \ + (BIT_ULL(VIRTIO_ADMIN_CMD_CAP_ID_LIST_QUERY) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DRIVER_CAP_SET) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DEVICE_CAP_GET) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_CREATE) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_RESOURCE_OBJ_DESTROY) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_METADATA_GET) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_GET) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DEV_PARTS_SET) | \ + BIT_ULL(VIRTIO_ADMIN_CMD_DEV_MODE_SET)) + +/* Unlike modern drivers which support hardware virtio devices, legacy drivers + * assume software-based devices: e.g. they don't use proper memory barriers + * on ARM, use big endian on PPC, etc. X86 drivers are mostly ok though, more + * or less by chance. For now, only support legacy IO on X86. + */ +#ifdef CONFIG_VIRTIO_PCI_ADMIN_LEGACY +#define VIRTIO_ADMIN_CMD_BITMAP (VIRTIO_LEGACY_ADMIN_CMD_BITMAP | \ + VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP) +#else +#define VIRTIO_ADMIN_CMD_BITMAP VIRTIO_DEV_PARTS_ADMIN_CMD_BITMAP +#endif + +bool vp_is_avq(struct virtio_device *vdev, unsigned int index); +void vp_modern_avq_done(struct virtqueue *vq); +int vp_modern_admin_cmd_exec(struct virtio_device *vdev, + struct virtio_admin_cmd *cmd); + #endif |