diff options
Diffstat (limited to 'include/virtio_loopback.h')
| -rw-r--r-- | include/virtio_loopback.h | 167 |
1 files changed, 91 insertions, 76 deletions
diff --git a/include/virtio_loopback.h b/include/virtio_loopback.h index ac23299..e3f4a78 100644 --- a/include/virtio_loopback.h +++ b/include/virtio_loopback.h @@ -16,7 +16,7 @@ * * 3) vhost.h of QEMU project * - * Copyright 2022-2023 Virtual Open Systems SAS. + * Copyright 2022-2024 Virtual Open Systems SAS. * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. @@ -165,25 +165,11 @@ sizeof(virtio_device_info_struct_t)) #define IRQ _IOC(_IOC_WRITE, 'k', 4, sizeof(int)) #define SHARE_VQS _IOC(_IOC_WRITE, 'k', 5, sizeof(uint32_t)) -#define SHARE_COM_STRUCT _IOC(_IOC_WRITE, 'k', 7, 0) +#define SHARE_COM_STRUCT _IOC(_IOC_WRITE, 'k', 6, 0) +#define SHARE_VQS_NOTIF _IOC(_IOC_WRITE, 'k', 7, sizeof(struct vq_notifier)) #define VIRTIO_PCI_VRING_ALIGN 4096 -typedef struct VirtIOMMIOProxy { - /* Generic */ - bool legacy; - uint32_t flags; - /* Guest accessible state needing migration and reset */ - uint32_t host_features_sel; - uint32_t guest_features_sel; - uint32_t guest_page_shift; - /* virtio-bus */ - bool format_transport_address; - /* Fields only used for non-legacy (v2) devices */ - uint32_t guest_features[2]; -} VirtIOMMIOProxy; - - /* Vring specific */ /* This marks a buffer as continuing via the next field. */ #define VRING_DESC_F_NEXT 1 @@ -252,12 +238,86 @@ typedef struct VirtIOMMIOProxy { #define VRING_AVAIL_ALIGN_SIZE 2 #define VRING_USED_ALIGN_SIZE 4 #define VRING_DESC_ALIGN_SIZE 16 + +/* + * Do we get callbacks when the ring is completely used, even if we've + * suppressed them? + */ +#define VIRTIO_F_NOTIFY_ON_EMPTY 24 +#define VIRTIO_CONFIG_S_FEATURES_OK 8 +#define VIRTIO_CONFIG_S_DRIVER_OK 4 +#define VIRTIO_F_VERSION_1 32 +#define VIRTIO_F_ACCESS_PLATFORM 33 +#define VIRTIO_F_IN_ORDER 35 +#define VIRTIO_F_NOTIFICATION_DATA 38 + +/* + * Legacy name for VIRTIO_F_ACCESS_PLATFORM + * (for compatibility with old userspace) + */ +#ifndef VIRTIO_F_IOMMU_PLATFORM +#define VIRTIO_F_IOMMU_PLATFORM 33 +#endif + +/* QEMU Aligned functions */ +/* + * Round number down to multiple. Safe when m is not a power of 2 (see + * ROUND_DOWN for a faster version when a power of 2 is guaranteed). + */ +#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) + +/* + * Round number up to multiple. Safe when m is not a power of 2 (see + * ROUND_UP for a faster version when a power of 2 is guaranteed). + */ +#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) + +/* Check if n is a multiple of m */ +#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) + +/* n-byte align pointer down */ +#define QEMU_ALIGN_PTR_DOWN(p, n) \ + ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) + +/* n-byte align pointer up */ +#define QEMU_ALIGN_PTR_UP(p, n) \ + ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) + +/* Check if pointer p is n-bytes aligned */ +#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) + +/* + * Define 1 GB offset in order to request big enough + * memory blocks from the kernel: + * 0x40000000 = 1024 * 1024 * 1024 = 64 * 4096 * 4096 = 1G + */ +#define OFFSET_1GB (64ULL * PAGE_SIZE * PAGE_SIZE) + +/* + * Define starting physical address of host memory address space + */ +#define INIT_PA 0 + /******************/ #define container_of(ptr, type, member) ({ \ const typeof(((type *) 0)->member) *__mptr = (ptr); \ (type *) ((char *) __mptr - offsetof(type, member));}) +typedef struct VirtIOMMIOProxy { + /* Generic */ + bool legacy; + uint32_t flags; + /* Guest accessible state needing migration and reset */ + uint32_t host_features_sel; + uint32_t guest_features_sel; + uint32_t guest_page_shift; + /* virtio-bus */ + bool format_transport_address; + /* Fields only used for non-legacy (v2) devices */ + uint32_t guest_features[2]; +} VirtIOMMIOProxy; + typedef struct VRing { unsigned int num; unsigned int num_default; @@ -384,6 +444,7 @@ typedef struct VirtIODevice { int notify_cnt; bool enable_virtio_interrupt; pthread_mutex_t interrupt_lock; + pthread_mutex_t isr_lock; int nvectors; VirtQueue *vq; VirtQueue **vqs; @@ -416,6 +477,12 @@ typedef struct VirtIODevice { const int *user_feature_bits; } VirtIODevice; +struct vq_notifier { + uint32_t vq_index; + int notifier_fd; + int pid; +}; + typedef struct efd_data { int efd[2]; int pid; @@ -652,64 +719,12 @@ int virtqueue_split_read_next_desc(VirtIODevice *vdev, VRingDesc *desc, unsigned int max, unsigned int *next); void print_config(uint8_t *config); uint32_t get_vqs_max_size(VirtIODevice *vdev); - -/* - * Do we get callbacks when the ring is completely used, even if we've - * suppressed them? - */ -#define VIRTIO_F_NOTIFY_ON_EMPTY 24 -#define VIRTIO_CONFIG_S_FEATURES_OK 8 -#define VIRTIO_CONFIG_S_DRIVER_OK 4 -#define VIRTIO_F_VERSION_1 32 -#define VIRTIO_F_ACCESS_PLATFORM 33 -#define VIRTIO_F_IN_ORDER 35 -#define VIRTIO_F_NOTIFICATION_DATA 38 - -/* - * Legacy name for VIRTIO_F_ACCESS_PLATFORM - * (for compatibility with old userspace) - */ -#ifndef VIRTIO_F_IOMMU_PLATFORM -#define VIRTIO_F_IOMMU_PLATFORM 33 -#endif - -/* QEMU Aligned functions */ -/* - * Round number down to multiple. Safe when m is not a power of 2 (see - * ROUND_DOWN for a faster version when a power of 2 is guaranteed). - */ -#define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) - -/* - * Round number up to multiple. Safe when m is not a power of 2 (see - * ROUND_UP for a faster version when a power of 2 is guaranteed). - */ -#define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) - -/* Check if n is a multiple of m */ -#define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) - -/* n-byte align pointer down */ -#define QEMU_ALIGN_PTR_DOWN(p, n) \ - ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) - -/* n-byte align pointer up */ -#define QEMU_ALIGN_PTR_UP(p, n) \ - ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) - -/* Check if pointer p is n-bytes aligned */ -#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) - -/* - * Define 1 GB offset in order to request big enough - * memory blocks from the kernel: - * 0x40000000 = 1024 * 1024 * 1024 = 64 * 4096 * 4096 = 1G - */ -#define OFFSET_1GB (64ULL * PAGE_SIZE * PAGE_SIZE) - -/* - * Define starting physical address of host memory address space - */ -#define INIT_PA 0 +int virtio_set_status(VirtIODevice *vdev, uint8_t val); +void virtio_queue_update_rings(VirtIODevice *vdev, int n); +void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); +bool virtio_split_should_notify(VirtIODevice *vdev, VirtQueue *vq); +uint64_t virtio_queue_get_addr(VirtIODevice *vdev, int n); +void virtio_queue_set_addr(VirtIODevice *vdev, int n, uint64_t addr); +void virtio_set_started(VirtIODevice *vdev, bool started); #endif /* VIRTIO_LOOPBACK */ |