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OpenCloudOS-Kernel/drivers/gpu/drm/virtio/virtgpu_vq.c

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/*
* Copyright (C) 2015 Red Hat, Inc.
* All Rights Reserved.
*
* Authors:
* Dave Airlie <airlied@redhat.com>
* Gerd Hoffmann <kraxel@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <drm/drmP.h>
#include "virtgpu_drv.h"
#include <linux/virtio.h>
#include <linux/virtio_config.h>
#include <linux/virtio_ring.h>
#define MAX_INLINE_CMD_SIZE 96
#define MAX_INLINE_RESP_SIZE 24
#define VBUFFER_SIZE (sizeof(struct virtio_gpu_vbuffer) \
+ MAX_INLINE_CMD_SIZE \
+ MAX_INLINE_RESP_SIZE)
void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
uint32_t *resid)
{
int handle;
idr_preload(GFP_KERNEL);
spin_lock(&vgdev->resource_idr_lock);
handle = idr_alloc(&vgdev->resource_idr, NULL, 1, 0, GFP_NOWAIT);
spin_unlock(&vgdev->resource_idr_lock);
idr_preload_end();
*resid = handle;
}
void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id)
{
spin_lock(&vgdev->resource_idr_lock);
idr_remove(&vgdev->resource_idr, id);
spin_unlock(&vgdev->resource_idr_lock);
}
void virtio_gpu_ctrl_ack(struct virtqueue *vq)
{
struct drm_device *dev = vq->vdev->priv;
struct virtio_gpu_device *vgdev = dev->dev_private;
schedule_work(&vgdev->ctrlq.dequeue_work);
}
void virtio_gpu_cursor_ack(struct virtqueue *vq)
{
struct drm_device *dev = vq->vdev->priv;
struct virtio_gpu_device *vgdev = dev->dev_private;
schedule_work(&vgdev->cursorq.dequeue_work);
}
int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev)
{
struct virtio_gpu_vbuffer *vbuf;
int i, size, count = 0;
void *ptr;
INIT_LIST_HEAD(&vgdev->free_vbufs);
spin_lock_init(&vgdev->free_vbufs_lock);
count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
count += virtqueue_get_vring_size(vgdev->cursorq.vq);
size = count * VBUFFER_SIZE;
DRM_INFO("virtio vbuffers: %d bufs, %zdB each, %dkB total.\n",
count, VBUFFER_SIZE, size / 1024);
vgdev->vbufs = kzalloc(size, GFP_KERNEL);
if (!vgdev->vbufs)
return -ENOMEM;
for (i = 0, ptr = vgdev->vbufs;
i < count;
i++, ptr += VBUFFER_SIZE) {
vbuf = ptr;
list_add(&vbuf->list, &vgdev->free_vbufs);
}
return 0;
}
void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev)
{
struct virtio_gpu_vbuffer *vbuf;
int i, count = 0;
count += virtqueue_get_vring_size(vgdev->ctrlq.vq);
count += virtqueue_get_vring_size(vgdev->cursorq.vq);
spin_lock(&vgdev->free_vbufs_lock);
for (i = 0; i < count; i++) {
if (WARN_ON(list_empty(&vgdev->free_vbufs)))
return;
vbuf = list_first_entry(&vgdev->free_vbufs,
struct virtio_gpu_vbuffer, list);
list_del(&vbuf->list);
}
spin_unlock(&vgdev->free_vbufs_lock);
kfree(vgdev->vbufs);
}
static struct virtio_gpu_vbuffer*
virtio_gpu_get_vbuf(struct virtio_gpu_device *vgdev,
int size, int resp_size, void *resp_buf,
virtio_gpu_resp_cb resp_cb)
{
struct virtio_gpu_vbuffer *vbuf;
spin_lock(&vgdev->free_vbufs_lock);
BUG_ON(list_empty(&vgdev->free_vbufs));
vbuf = list_first_entry(&vgdev->free_vbufs,
struct virtio_gpu_vbuffer, list);
list_del(&vbuf->list);
spin_unlock(&vgdev->free_vbufs_lock);
memset(vbuf, 0, VBUFFER_SIZE);
BUG_ON(size > MAX_INLINE_CMD_SIZE);
vbuf->buf = (void *)vbuf + sizeof(*vbuf);
vbuf->size = size;
vbuf->resp_cb = resp_cb;
vbuf->resp_size = resp_size;
if (resp_size <= MAX_INLINE_RESP_SIZE)
vbuf->resp_buf = (void *)vbuf->buf + size;
else
vbuf->resp_buf = resp_buf;
BUG_ON(!vbuf->resp_buf);
return vbuf;
}
static void *virtio_gpu_alloc_cmd(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer **vbuffer_p,
int size)
{
struct virtio_gpu_vbuffer *vbuf;
vbuf = virtio_gpu_get_vbuf(vgdev, size,
sizeof(struct virtio_gpu_ctrl_hdr),
NULL, NULL);
if (IS_ERR(vbuf)) {
*vbuffer_p = NULL;
return ERR_CAST(vbuf);
}
*vbuffer_p = vbuf;
return vbuf->buf;
}
static struct virtio_gpu_update_cursor*
virtio_gpu_alloc_cursor(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer **vbuffer_p)
{
struct virtio_gpu_vbuffer *vbuf;
vbuf = virtio_gpu_get_vbuf
(vgdev, sizeof(struct virtio_gpu_update_cursor),
0, NULL, NULL);
if (IS_ERR(vbuf)) {
*vbuffer_p = NULL;
return ERR_CAST(vbuf);
}
*vbuffer_p = vbuf;
return (struct virtio_gpu_update_cursor *)vbuf->buf;
}
static void *virtio_gpu_alloc_cmd_resp(struct virtio_gpu_device *vgdev,
virtio_gpu_resp_cb cb,
struct virtio_gpu_vbuffer **vbuffer_p,
int cmd_size, int resp_size,
void *resp_buf)
{
struct virtio_gpu_vbuffer *vbuf;
vbuf = virtio_gpu_get_vbuf(vgdev, cmd_size,
resp_size, resp_buf, cb);
if (IS_ERR(vbuf)) {
*vbuffer_p = NULL;
return ERR_CAST(vbuf);
}
*vbuffer_p = vbuf;
return (struct virtio_gpu_command *)vbuf->buf;
}
static void free_vbuf(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
if (vbuf->resp_size > MAX_INLINE_RESP_SIZE)
kfree(vbuf->resp_buf);
kfree(vbuf->data_buf);
spin_lock(&vgdev->free_vbufs_lock);
list_add(&vbuf->list, &vgdev->free_vbufs);
spin_unlock(&vgdev->free_vbufs_lock);
}
static void reclaim_vbufs(struct virtqueue *vq, struct list_head *reclaim_list)
{
struct virtio_gpu_vbuffer *vbuf;
unsigned int len;
int freed = 0;
while ((vbuf = virtqueue_get_buf(vq, &len))) {
list_add_tail(&vbuf->list, reclaim_list);
freed++;
}
if (freed == 0)
DRM_DEBUG("Huh? zero vbufs reclaimed");
}
void virtio_gpu_dequeue_ctrl_func(struct work_struct *work)
{
struct virtio_gpu_device *vgdev =
container_of(work, struct virtio_gpu_device,
ctrlq.dequeue_work);
struct list_head reclaim_list;
struct virtio_gpu_vbuffer *entry, *tmp;
struct virtio_gpu_ctrl_hdr *resp;
u64 fence_id = 0;
INIT_LIST_HEAD(&reclaim_list);
spin_lock(&vgdev->ctrlq.qlock);
do {
virtqueue_disable_cb(vgdev->ctrlq.vq);
reclaim_vbufs(vgdev->ctrlq.vq, &reclaim_list);
} while (!virtqueue_enable_cb(vgdev->ctrlq.vq));
spin_unlock(&vgdev->ctrlq.qlock);
list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
resp = (struct virtio_gpu_ctrl_hdr *)entry->resp_buf;
if (resp->type != cpu_to_le32(VIRTIO_GPU_RESP_OK_NODATA))
DRM_DEBUG("response 0x%x\n", le32_to_cpu(resp->type));
if (resp->flags & cpu_to_le32(VIRTIO_GPU_FLAG_FENCE)) {
u64 f = le64_to_cpu(resp->fence_id);
if (fence_id > f) {
DRM_ERROR("%s: Oops: fence %llx -> %llx\n",
__func__, fence_id, f);
} else {
fence_id = f;
}
}
if (entry->resp_cb)
entry->resp_cb(vgdev, entry);
list_del(&entry->list);
free_vbuf(vgdev, entry);
}
wake_up(&vgdev->ctrlq.ack_queue);
if (fence_id)
virtio_gpu_fence_event_process(vgdev, fence_id);
}
void virtio_gpu_dequeue_cursor_func(struct work_struct *work)
{
struct virtio_gpu_device *vgdev =
container_of(work, struct virtio_gpu_device,
cursorq.dequeue_work);
struct list_head reclaim_list;
struct virtio_gpu_vbuffer *entry, *tmp;
INIT_LIST_HEAD(&reclaim_list);
spin_lock(&vgdev->cursorq.qlock);
do {
virtqueue_disable_cb(vgdev->cursorq.vq);
reclaim_vbufs(vgdev->cursorq.vq, &reclaim_list);
} while (!virtqueue_enable_cb(vgdev->cursorq.vq));
spin_unlock(&vgdev->cursorq.qlock);
list_for_each_entry_safe(entry, tmp, &reclaim_list, list) {
list_del(&entry->list);
free_vbuf(vgdev, entry);
}
wake_up(&vgdev->cursorq.ack_queue);
}
static int virtio_gpu_queue_ctrl_buffer_locked(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
struct virtqueue *vq = vgdev->ctrlq.vq;
struct scatterlist *sgs[3], vcmd, vout, vresp;
int outcnt = 0, incnt = 0;
int ret;
if (!vgdev->vqs_ready)
return -ENODEV;
sg_init_one(&vcmd, vbuf->buf, vbuf->size);
sgs[outcnt+incnt] = &vcmd;
outcnt++;
if (vbuf->data_size) {
sg_init_one(&vout, vbuf->data_buf, vbuf->data_size);
sgs[outcnt + incnt] = &vout;
outcnt++;
}
if (vbuf->resp_size) {
sg_init_one(&vresp, vbuf->resp_buf, vbuf->resp_size);
sgs[outcnt + incnt] = &vresp;
incnt++;
}
retry:
ret = virtqueue_add_sgs(vq, sgs, outcnt, incnt, vbuf, GFP_ATOMIC);
if (ret == -ENOSPC) {
spin_unlock(&vgdev->ctrlq.qlock);
wait_event(vgdev->ctrlq.ack_queue, vq->num_free);
spin_lock(&vgdev->ctrlq.qlock);
goto retry;
} else {
virtqueue_kick(vq);
}
if (!ret)
ret = vq->num_free;
return ret;
}
static int virtio_gpu_queue_ctrl_buffer(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
int rc;
spin_lock(&vgdev->ctrlq.qlock);
rc = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf);
spin_unlock(&vgdev->ctrlq.qlock);
return rc;
}
static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf,
struct virtio_gpu_ctrl_hdr *hdr,
struct virtio_gpu_fence **fence)
{
struct virtqueue *vq = vgdev->ctrlq.vq;
int rc;
again:
spin_lock(&vgdev->ctrlq.qlock);
/*
* Make sure we have enouth space in the virtqueue. If not
* wait here until we have.
*
* Without that virtio_gpu_queue_ctrl_buffer_nolock might have
* to wait for free space, which can result in fence ids being
* submitted out-of-order.
*/
if (vq->num_free < 3) {
spin_unlock(&vgdev->ctrlq.qlock);
wait_event(vgdev->ctrlq.ack_queue, vq->num_free >= 3);
goto again;
}
if (fence)
virtio_gpu_fence_emit(vgdev, hdr, fence);
rc = virtio_gpu_queue_ctrl_buffer_locked(vgdev, vbuf);
spin_unlock(&vgdev->ctrlq.qlock);
return rc;
}
static int virtio_gpu_queue_cursor(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
struct virtqueue *vq = vgdev->cursorq.vq;
struct scatterlist *sgs[1], ccmd;
int ret;
int outcnt;
if (!vgdev->vqs_ready)
return -ENODEV;
sg_init_one(&ccmd, vbuf->buf, vbuf->size);
sgs[0] = &ccmd;
outcnt = 1;
spin_lock(&vgdev->cursorq.qlock);
retry:
ret = virtqueue_add_sgs(vq, sgs, outcnt, 0, vbuf, GFP_ATOMIC);
if (ret == -ENOSPC) {
spin_unlock(&vgdev->cursorq.qlock);
wait_event(vgdev->cursorq.ack_queue, vq->num_free);
spin_lock(&vgdev->cursorq.qlock);
goto retry;
} else {
virtqueue_kick(vq);
}
spin_unlock(&vgdev->cursorq.qlock);
if (!ret)
ret = vq->num_free;
return ret;
}
/* just create gem objects for userspace and long lived objects,
just use dma_alloced pages for the queue objects? */
/* create a basic resource */
void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
uint32_t resource_id,
uint32_t format,
uint32_t width,
uint32_t height)
{
struct virtio_gpu_resource_create_2d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_2D);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->format = cpu_to_le32(format);
cmd_p->width = cpu_to_le32(width);
cmd_p->height = cpu_to_le32(height);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
uint32_t resource_id)
{
struct virtio_gpu_resource_unref *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_UNREF);
cmd_p->resource_id = cpu_to_le32(resource_id);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
uint32_t resource_id)
{
struct virtio_gpu_resource_detach_backing *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING);
cmd_p->resource_id = cpu_to_le32(resource_id);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
uint32_t scanout_id, uint32_t resource_id,
uint32_t width, uint32_t height,
uint32_t x, uint32_t y)
{
struct virtio_gpu_set_scanout *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SET_SCANOUT);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->scanout_id = cpu_to_le32(scanout_id);
cmd_p->r.width = cpu_to_le32(width);
cmd_p->r.height = cpu_to_le32(height);
cmd_p->r.x = cpu_to_le32(x);
cmd_p->r.y = cpu_to_le32(y);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
uint32_t resource_id,
uint32_t x, uint32_t y,
uint32_t width, uint32_t height)
{
struct virtio_gpu_resource_flush *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_FLUSH);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->r.width = cpu_to_le32(width);
cmd_p->r.height = cpu_to_le32(height);
cmd_p->r.x = cpu_to_le32(x);
cmd_p->r.y = cpu_to_le32(y);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
uint32_t resource_id, uint64_t offset,
__le32 width, __le32 height,
__le32 x, __le32 y,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_transfer_to_host_2d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->offset = cpu_to_le64(offset);
cmd_p->r.width = width;
cmd_p->r.height = height;
cmd_p->r.x = x;
cmd_p->r.y = y;
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
static void
virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_device *vgdev,
uint32_t resource_id,
struct virtio_gpu_mem_entry *ents,
uint32_t nents,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_resource_attach_backing *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->nr_entries = cpu_to_le32(nents);
vbuf->data_buf = ents;
vbuf->data_size = sizeof(*ents) * nents;
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
static void virtio_gpu_cmd_get_display_info_cb(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
struct virtio_gpu_resp_display_info *resp =
(struct virtio_gpu_resp_display_info *)vbuf->resp_buf;
int i;
spin_lock(&vgdev->display_info_lock);
for (i = 0; i < vgdev->num_scanouts; i++) {
vgdev->outputs[i].info = resp->pmodes[i];
if (resp->pmodes[i].enabled) {
DRM_DEBUG("output %d: %dx%d+%d+%d", i,
le32_to_cpu(resp->pmodes[i].r.width),
le32_to_cpu(resp->pmodes[i].r.height),
le32_to_cpu(resp->pmodes[i].r.x),
le32_to_cpu(resp->pmodes[i].r.y));
} else {
DRM_DEBUG("output %d: disabled", i);
}
}
vgdev->display_info_pending = false;
spin_unlock(&vgdev->display_info_lock);
wake_up(&vgdev->resp_wq);
if (!drm_helper_hpd_irq_event(vgdev->ddev))
drm_kms_helper_hotplug_event(vgdev->ddev);
}
static void virtio_gpu_cmd_get_capset_info_cb(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
struct virtio_gpu_get_capset_info *cmd =
(struct virtio_gpu_get_capset_info *)vbuf->buf;
struct virtio_gpu_resp_capset_info *resp =
(struct virtio_gpu_resp_capset_info *)vbuf->resp_buf;
int i = le32_to_cpu(cmd->capset_index);
spin_lock(&vgdev->display_info_lock);
vgdev->capsets[i].id = le32_to_cpu(resp->capset_id);
vgdev->capsets[i].max_version = le32_to_cpu(resp->capset_max_version);
vgdev->capsets[i].max_size = le32_to_cpu(resp->capset_max_size);
spin_unlock(&vgdev->display_info_lock);
wake_up(&vgdev->resp_wq);
}
static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,
struct virtio_gpu_vbuffer *vbuf)
{
struct virtio_gpu_get_capset *cmd =
(struct virtio_gpu_get_capset *)vbuf->buf;
struct virtio_gpu_resp_capset *resp =
(struct virtio_gpu_resp_capset *)vbuf->resp_buf;
struct virtio_gpu_drv_cap_cache *cache_ent;
spin_lock(&vgdev->display_info_lock);
list_for_each_entry(cache_ent, &vgdev->cap_cache, head) {
if (cache_ent->version == le32_to_cpu(cmd->capset_version) &&
cache_ent->id == le32_to_cpu(cmd->capset_id)) {
memcpy(cache_ent->caps_cache, resp->capset_data,
cache_ent->size);
atomic_set(&cache_ent->is_valid, 1);
break;
}
}
spin_unlock(&vgdev->display_info_lock);
wake_up(&vgdev->resp_wq);
}
int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev)
{
struct virtio_gpu_ctrl_hdr *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
void *resp_buf;
resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_display_info),
GFP_KERNEL);
if (!resp_buf)
return -ENOMEM;
cmd_p = virtio_gpu_alloc_cmd_resp
(vgdev, &virtio_gpu_cmd_get_display_info_cb, &vbuf,
sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_display_info),
resp_buf);
memset(cmd_p, 0, sizeof(*cmd_p));
vgdev->display_info_pending = true;
cmd_p->type = cpu_to_le32(VIRTIO_GPU_CMD_GET_DISPLAY_INFO);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
return 0;
}
int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx)
{
struct virtio_gpu_get_capset_info *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
void *resp_buf;
resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset_info),
GFP_KERNEL);
if (!resp_buf)
return -ENOMEM;
cmd_p = virtio_gpu_alloc_cmd_resp
(vgdev, &virtio_gpu_cmd_get_capset_info_cb, &vbuf,
sizeof(*cmd_p), sizeof(struct virtio_gpu_resp_capset_info),
resp_buf);
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET_INFO);
cmd_p->capset_index = cpu_to_le32(idx);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
return 0;
}
int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
int idx, int version,
struct virtio_gpu_drv_cap_cache **cache_p)
{
struct virtio_gpu_get_capset *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
int max_size = vgdev->capsets[idx].max_size;
struct virtio_gpu_drv_cap_cache *cache_ent;
void *resp_buf;
if (idx > vgdev->num_capsets)
return -EINVAL;
if (version > vgdev->capsets[idx].max_version)
return -EINVAL;
cache_ent = kzalloc(sizeof(*cache_ent), GFP_KERNEL);
if (!cache_ent)
return -ENOMEM;
cache_ent->caps_cache = kmalloc(max_size, GFP_KERNEL);
if (!cache_ent->caps_cache) {
kfree(cache_ent);
return -ENOMEM;
}
resp_buf = kzalloc(sizeof(struct virtio_gpu_resp_capset) + max_size,
GFP_KERNEL);
if (!resp_buf) {
kfree(cache_ent->caps_cache);
kfree(cache_ent);
return -ENOMEM;
}
cache_ent->version = version;
cache_ent->id = vgdev->capsets[idx].id;
atomic_set(&cache_ent->is_valid, 0);
cache_ent->size = max_size;
spin_lock(&vgdev->display_info_lock);
list_add_tail(&cache_ent->head, &vgdev->cap_cache);
spin_unlock(&vgdev->display_info_lock);
cmd_p = virtio_gpu_alloc_cmd_resp
(vgdev, &virtio_gpu_cmd_capset_cb, &vbuf, sizeof(*cmd_p),
sizeof(struct virtio_gpu_resp_capset) + max_size,
resp_buf);
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_GET_CAPSET);
cmd_p->capset_id = cpu_to_le32(vgdev->capsets[idx].id);
cmd_p->capset_version = cpu_to_le32(version);
*cache_p = cache_ent;
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
return 0;
}
void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
uint32_t nlen, const char *name)
{
struct virtio_gpu_ctx_create *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_CREATE);
cmd_p->hdr.ctx_id = cpu_to_le32(id);
cmd_p->nlen = cpu_to_le32(nlen);
strncpy(cmd_p->debug_name, name, sizeof(cmd_p->debug_name)-1);
cmd_p->debug_name[sizeof(cmd_p->debug_name)-1] = 0;
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
uint32_t id)
{
struct virtio_gpu_ctx_destroy *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DESTROY);
cmd_p->hdr.ctx_id = cpu_to_le32(id);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
uint32_t ctx_id,
uint32_t resource_id)
{
struct virtio_gpu_ctx_resource *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE);
cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
cmd_p->resource_id = cpu_to_le32(resource_id);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
uint32_t ctx_id,
uint32_t resource_id)
{
struct virtio_gpu_ctx_resource *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_CTX_DETACH_RESOURCE);
cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
cmd_p->resource_id = cpu_to_le32(resource_id);
virtio_gpu_queue_ctrl_buffer(vgdev, vbuf);
}
void
virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
struct virtio_gpu_resource_create_3d *rc_3d,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_resource_create_3d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
*cmd_p = *rc_3d;
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_RESOURCE_CREATE_3D);
cmd_p->hdr.flags = 0;
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
uint32_t resource_id, uint32_t ctx_id,
uint64_t offset, uint32_t level,
struct virtio_gpu_box *box,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_transfer_host_3d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_TO_HOST_3D);
cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->box = *box;
cmd_p->offset = cpu_to_le64(offset);
cmd_p->level = cpu_to_le32(level);
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
uint32_t resource_id, uint32_t ctx_id,
uint64_t offset, uint32_t level,
struct virtio_gpu_box *box,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_transfer_host_3d *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_TRANSFER_FROM_HOST_3D);
cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
cmd_p->resource_id = cpu_to_le32(resource_id);
cmd_p->box = *box;
cmd_p->offset = cpu_to_le64(offset);
cmd_p->level = cpu_to_le32(level);
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
void *data, uint32_t data_size,
uint32_t ctx_id, struct virtio_gpu_fence **fence)
{
struct virtio_gpu_cmd_submit *cmd_p;
struct virtio_gpu_vbuffer *vbuf;
cmd_p = virtio_gpu_alloc_cmd(vgdev, &vbuf, sizeof(*cmd_p));
memset(cmd_p, 0, sizeof(*cmd_p));
vbuf->data_buf = data;
vbuf->data_size = data_size;
cmd_p->hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_SUBMIT_3D);
cmd_p->hdr.ctx_id = cpu_to_le32(ctx_id);
cmd_p->size = cpu_to_le32(data_size);
virtio_gpu_queue_fenced_ctrl_buffer(vgdev, vbuf, &cmd_p->hdr, fence);
}
int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
struct virtio_gpu_object *obj,
uint32_t resource_id,
struct virtio_gpu_fence **fence)
{
struct virtio_gpu_mem_entry *ents;
struct scatterlist *sg;
int si;
if (!obj->pages) {
int ret;
ret = virtio_gpu_object_get_sg_table(vgdev, obj);
if (ret)
return ret;
}
/* gets freed when the ring has consumed it */
ents = kmalloc_array(obj->pages->nents,
sizeof(struct virtio_gpu_mem_entry),
GFP_KERNEL);
if (!ents) {
DRM_ERROR("failed to allocate ent list\n");
return -ENOMEM;
}
for_each_sg(obj->pages->sgl, sg, obj->pages->nents, si) {
ents[si].addr = cpu_to_le64(sg_phys(sg));
ents[si].length = cpu_to_le32(sg->length);
ents[si].padding = 0;
}
virtio_gpu_cmd_resource_attach_backing(vgdev, resource_id,
ents, obj->pages->nents,
fence);
obj->hw_res_handle = resource_id;
return 0;
}
void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
struct virtio_gpu_output *output)
{
struct virtio_gpu_vbuffer *vbuf;
struct virtio_gpu_update_cursor *cur_p;
output->cursor.pos.scanout_id = cpu_to_le32(output->index);
cur_p = virtio_gpu_alloc_cursor(vgdev, &vbuf);
memcpy(cur_p, &output->cursor, sizeof(output->cursor));
virtio_gpu_queue_cursor(vgdev, vbuf);
}
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