- 根目录:
- drivers
- gpu
- drm
- qxl
- qxl_cmd.c
/*
* Copyright 2013 Red Hat Inc.
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Dave Airlie
* Alon Levy
*/
/* QXL cmd/ring handling */
#include "qxl_drv.h"
#include "qxl_object.h"
static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap);
struct ring {
struct qxl_ring_header header;
uint8_t elements[0];
};
struct qxl_ring {
struct ring *ring;
int element_size;
int n_elements;
int prod_notify;
wait_queue_head_t *push_event;
spinlock_t lock;
};
void qxl_ring_free(struct qxl_ring *ring)
{
kfree(ring);
}
void qxl_ring_init_hdr(struct qxl_ring *ring)
{
ring->ring->header.notify_on_prod = ring->n_elements;
}
struct qxl_ring *
qxl_ring_create(struct qxl_ring_header *header,
int element_size,
int n_elements,
int prod_notify,
bool set_prod_notify,
wait_queue_head_t *push_event)
{
struct qxl_ring *ring;
ring = kmalloc(sizeof(*ring), GFP_KERNEL);
if (!ring)
return NULL;
ring->ring = (struct ring *)header;
ring->element_size = element_size;
ring->n_elements = n_elements;
ring->prod_notify = prod_notify;
ring->push_event = push_event;
if (set_prod_notify)
qxl_ring_init_hdr(ring);
spin_lock_init(&ring->lock);
return ring;
}
static int qxl_check_header(struct qxl_ring *ring)
{
int ret;
struct qxl_ring_header *header = &(ring->ring->header);
unsigned long flags;
spin_lock_irqsave(&ring->lock, flags);
ret = header->prod - header->cons < header->num_items;
if (ret == 0)
header->notify_on_cons = header->cons + 1;
spin_unlock_irqrestore(&ring->lock, flags);
return ret;
}
int qxl_check_idle(struct qxl_ring *ring)
{
int ret;
struct qxl_ring_header *header = &(ring->ring->header);
unsigned long flags;
spin_lock_irqsave(&ring->lock, flags);
ret = header->prod == header->cons;
spin_unlock_irqrestore(&ring->lock, flags);
return ret;
}
int qxl_ring_push(struct qxl_ring *ring,
const void *new_elt, bool interruptible)
{
struct qxl_ring_header *header = &(ring->ring->header);
uint8_t *elt;
int idx, ret;
unsigned long flags;
spin_lock_irqsave(&ring->lock, flags);
if (header->prod - header->cons == header->num_items) {
header->notify_on_cons = header->cons + 1;
mb();
spin_unlock_irqrestore(&ring->lock, flags);
if (!drm_can_sleep()) {
while (!qxl_check_header(ring))
udelay(1);
} else {
if (interruptible) {
ret = wait_event_interruptible(*ring->push_event,
qxl_check_header(ring));
if (ret)
return ret;
} else {
wait_event(*ring->push_event,
qxl_check_header(ring));
}
}
spin_lock_irqsave(&ring->lock, flags);
}
idx = header->prod & (ring->n_elements - 1);
elt = ring->ring->elements + idx * ring->element_size;
memcpy((void *)elt, new_elt, ring->element_size);
header->prod++;
mb();
if (header->prod == header->notify_on_prod)
outb(0, ring->prod_notify);
spin_unlock_irqrestore(&ring->lock, flags);
return 0;
}
static bool qxl_ring_pop(struct qxl_ring *ring,
void *element)
{
volatile struct qxl_ring_header *header = &(ring->ring->header);
volatile uint8_t *ring_elt;
int idx;
unsigned long flags;
spin_lock_irqsave(&ring->lock, flags);
if (header->cons == header->prod) {
header->notify_on_prod = header->cons + 1;
spin_unlock_irqrestore(&ring->lock, flags);
return false;
}
idx = header->cons & (ring->n_elements - 1);
ring_elt = ring->ring->elements + idx * ring->element_size;
memcpy(element, (void *)ring_elt, ring->element_size);
header->cons++;
spin_unlock_irqrestore(&ring->lock, flags);
return true;
}
int
qxl_push_command_ring_release(struct qxl_device *qdev, struct qxl_release *release,
uint32_t type, bool interruptible)
{
struct qxl_command cmd;
struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
cmd.type = type;
cmd.data = qxl_bo_physical_address(qdev, to_qxl_bo(entry->tv.bo), release->release_offset);
return qxl_ring_push(qdev->command_ring, &cmd, interruptible);
}
int
qxl_push_cursor_ring_release(struct qxl_device *qdev, struct qxl_release *release,
uint32_t type, bool interruptible)
{
struct qxl_command cmd;
struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
cmd.type = type;
cmd.data = qxl_bo_physical_address(qdev, to_qxl_bo(entry->tv.bo), release->release_offset);
return qxl_ring_push(qdev->cursor_ring, &cmd, interruptible);
}
bool qxl_queue_garbage_collect(struct qxl_device *qdev, bool flush)
{
if (!qxl_check_idle(qdev->release_ring)) {
queue_work(qdev->gc_queue, &qdev->gc_work);
if (flush)
flush_work(&qdev->gc_work);
return true;
}
return false;
}
int qxl_garbage_collect(struct qxl_device *qdev)
{
struct qxl_release *release;
uint64_t id, next_id;
int i = 0;
union qxl_release_info *info;
while (qxl_ring_pop(qdev->release_ring, &id)) {
QXL_INFO(qdev, "popped %lld\n", id);
while (id) {
release = qxl_release_from_id_locked(qdev, id);
if (release == NULL)
break;
info = qxl_release_map(qdev, release);
next_id = info->next;
qxl_release_unmap(qdev, release, info);
QXL_INFO(qdev, "popped %lld, next %lld\n", id,
next_id);
switch (release->type) {
case QXL_RELEASE_DRAWABLE:
case QXL_RELEASE_SURFACE_CMD:
case QXL_RELEASE_CURSOR_CMD:
break;
default:
DRM_ERROR("unexpected release type\n");
break;
}
id = next_id;
qxl_release_free(qdev, release);
++i;
}
}
QXL_INFO(qdev, "%s: %lld\n", __func__, i);
return i;
}
int qxl_alloc_bo_reserved(struct qxl_device *qdev,
struct qxl_release *release,
unsigned long size,
struct qxl_bo **_bo)
{
struct qxl_bo *bo;
int ret;
ret = qxl_bo_create(qdev, size, false /* not kernel - device */,
false, QXL_GEM_DOMAIN_VRAM, NULL, &bo);
if (ret) {
DRM_ERROR("failed to allocate VRAM BO\n");
return ret;
}
ret = qxl_release_list_add(release, bo);
if (ret)
goto out_unref;
*_bo = bo;
return 0;
out_unref:
qxl_bo_unref(&bo);
return ret;
}
static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port, bool intr)
{
int irq_num;
long addr = qdev->io_base + port;
int ret;
mutex_lock(&qdev->async_io_mutex);
irq_num = atomic_read(&qdev->irq_received_io_cmd);
if (qdev->last_sent_io_cmd > irq_num) {
if (intr)
ret = wait_event_interruptible_timeout(qdev->io_cmd_event,
atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
else
ret = wait_event_timeout(qdev->io_cmd_event,
atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
/* 0 is timeout, just bail the "hw" has gone away */
if (ret <= 0)
goto out;
irq_num = atomic_read(&qdev->irq_received_io_cmd);
}
outb(val, addr);
qdev->last_sent_io_cmd = irq_num + 1;
if (intr)
ret = wait_event_interruptible_timeout(qdev->io_cmd_event,
atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
else
ret = wait_event_timeout(qdev->io_cmd_event,
atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
out:
if (ret > 0)
ret = 0;
mutex_unlock(&qdev->async_io_mutex);
return ret;
}
static void wait_for_io_cmd(struct qxl_device *qdev, uint8_t val, long port)
{
int ret;
restart:
ret = wait_for_io_cmd_user(qdev, val, port, false);
if (ret == -ERESTARTSYS)
goto restart;
}
int qxl_io_update_area(struct qxl_device *qdev, struct qxl_bo *surf,
const struct qxl_rect *area)
{
int surface_id;
uint32_t surface_width, surface_height;
int ret;
if (!surf->hw_surf_alloc)
DRM_ERROR("got io update area with no hw surface\n");
if (surf->is_primary)
surface_id = 0;
else
surface_id = surf->surface_id;
surface_width = surf->surf.width;
surface_height = surf->surf.height;
if (area->left < 0 || area->top < 0 ||
area->right > surface_width || area->bottom > surface_height) {
qxl_io_log(qdev, "%s: not doing area update for "
"%d, (%d,%d,%d,%d) (%d,%d)\n", __func__, surface_id, area->left,
area->top, area->right, area->bottom, surface_width, surface_height);
return -EINVAL;
}
mutex_lock(&qdev->update_area_mutex);
qdev->ram_header->update_area = *area;
qdev->ram_header->update_surface = surface_id;
ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC, true);
mutex_unlock(&qdev->update_area_mutex);
return ret;
}
void qxl_io_notify_oom(struct qxl_device *qdev)
{
outb(0, qdev->io_base + QXL_IO_NOTIFY_OOM);
}
void qxl_io_flush_release(struct qxl_device *qdev)
{
outb(0, qdev->io_base + QXL_IO_FLUSH_RELEASE);
}
void qxl_io_flush_surfaces(struct qxl_device *qdev)
{
wait_for_io_cmd(qdev, 0, QXL_IO_FLUSH_SURFACES_ASYNC);
}
void qxl_io_destroy_primary(struct qxl_device *qdev)
{
wait_for_io_cmd(qdev, 0, QXL_IO_DESTROY_PRIMARY_ASYNC);
}
void qxl_io_create_primary(struct qxl_device *qdev,
unsigned offset, struct qxl_bo *bo)
{
struct qxl_surface_create *create;
QXL_INFO(qdev, "%s: qdev %p, ram_header %p\n", __func__, qdev,
qdev->ram_header);
create = &qdev->ram_header->create_surface;
create->format = bo->surf.format;
create->width = bo->surf.width;
create->height = bo->surf.height;
create->stride = bo->surf.stride;
create->mem = qxl_bo_physical_address(qdev, bo, offset);
QXL_INFO(qdev, "%s: mem = %llx, from %p\n", __func__, create->mem,
bo->kptr);
create->flags = QXL_SURF_FLAG_KEEP_DATA;
create->type = QXL_SURF_TYPE_PRIMARY;
wait_for_io_cmd(qdev, 0, QXL_IO_CREATE_PRIMARY_ASYNC);
}
void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id)
{
QXL_INFO(qdev, "qxl_memslot_add %d\n", id);
wait_for_io_cmd(qdev, id, QXL_IO_MEMSLOT_ADD_ASYNC);
}
void qxl_io_log(struct qxl_device *qdev, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vsnprintf(qdev->ram_header->log_buf, QXL_LOG_BUF_SIZE, fmt, args);
va_end(args);
/*
* DO not do a DRM output here - this will call printk, which will
* call back into qxl for rendering (qxl_fb)
*/
outb(0, qdev->io_base + QXL_IO_LOG);
}
void qxl_io_reset(struct qxl_device *qdev)
{
outb(0, qdev->io_base + QXL_IO_RESET);
}
void qxl_io_monitors_config(struct qxl_device *qdev)
{
qxl_io_log(qdev, "%s: %d [%dx%d+%d+%d]\n", __func__,
qdev->monitors_config ?
qdev->monitors_config->count : -1,
qdev->monitors_config && qdev->monitors_config->count ?
qdev->monitors_config->heads[0].width : -1,
qdev->monitors_config && qdev->monitors_config->count ?
qdev->monitors_config->heads[0].height : -1,
qdev->monitors_config && qdev->monitors_config->count ?
qdev->monitors_config->heads[0].x : -1,
qdev->monitors_config && qdev->monitors_config->count ?
qdev->monitors_config->heads[0].y : -1
);
wait_for_io_cmd(qdev, 0, QXL_IO_MONITORS_CONFIG_ASYNC);
}
int qxl_surface_id_alloc(struct qxl_device *qdev,
struct qxl_bo *surf)
{
uint32_t handle;
int idr_ret;
int count = 0;
again:
idr_preload(GFP_ATOMIC);
spin_lock(&qdev->surf_id_idr_lock);
idr_ret = idr_alloc(&qdev->surf_id_idr, NULL, 1, 0, GFP_NOWAIT);
spin_unlock(&qdev->surf_id_idr_lock);
idr_preload_end();
if (idr_ret < 0)
return idr_ret;
handle = idr_ret;
if (handle >= qdev->rom->n_surfaces) {
count++;
spin_lock(&qdev->surf_id_idr_lock);
idr_remove(&qdev->surf_id_idr, handle);
spin_unlock(&qdev->surf_id_idr_lock);
qxl_reap_surface_id(qdev, 2);
goto again;
}
surf->surface_id = handle;
spin_lock(&qdev->surf_id_idr_lock);
qdev->last_alloced_surf_id = handle;
spin_unlock(&qdev->surf_id_idr_lock);
return 0;
}
void qxl_surface_id_dealloc(struct qxl_device *qdev,
uint32_t surface_id)
{
spin_lock(&qdev->surf_id_idr_lock);
idr_remove(&qdev->surf_id_idr, surface_id);
spin_unlock(&qdev->surf_id_idr_lock);
}
int qxl_hw_surface_alloc(struct qxl_device *qdev,
struct qxl_bo *surf,
struct ttm_mem_reg *new_mem)
{
struct qxl_surface_cmd *cmd;
struct qxl_release *release;
int ret;
if (surf->hw_surf_alloc)
return 0;
ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_CREATE,
NULL,
&release);
if (ret)
return ret;
ret = qxl_release_reserve_list(release, true);
if (ret)
return ret;
cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release);
cmd->type = QXL_SURFACE_CMD_CREATE;
cmd->u.surface_create.format = surf->surf.format;
cmd->u.surface_create.width = surf->surf.width;
cmd->u.surface_create.height = surf->surf.height;
cmd->u.surface_create.stride = surf->surf.stride;
if (new_mem) {
int slot_id = surf->type == QXL_GEM_DOMAIN_VRAM ? qdev->main_mem_slot : qdev->surfaces_mem_slot;
struct qxl_memslot *slot = &(qdev->mem_slots[slot_id]);
/* TODO - need to hold one of the locks to read tbo.offset */
cmd->u.surface_create.data = slot->high_bits;
cmd->u.surface_create.data |= (new_mem->start << PAGE_SHIFT) + surf->tbo.bdev->man[new_mem->mem_type].gpu_offset;
} else
cmd->u.surface_create.data = qxl_bo_physical_address(qdev, surf, 0);
cmd->surface_id = surf->surface_id;
qxl_release_unmap(qdev, release, &cmd->release_info);
surf->surf_create = release;
/* no need to add a release to the fence for this surface bo,
since it is only released when we ask to destroy the surface
and it would never signal otherwise */
qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false);
qxl_release_fence_buffer_objects(release);
surf->hw_surf_alloc = true;
spin_lock(&qdev->surf_id_idr_lock);
idr_replace(&qdev->surf_id_idr, surf, surf->surface_id);
spin_unlock(&qdev->surf_id_idr_lock);
return 0;
}
int qxl_hw_surface_dealloc(struct qxl_device *qdev,
struct qxl_bo *surf)
{
struct qxl_surface_cmd *cmd;
struct qxl_release *release;
int ret;
int id;
if (!surf->hw_surf_alloc)
return 0;
ret = qxl_alloc_surface_release_reserved(qdev, QXL_SURFACE_CMD_DESTROY,
surf->surf_create,
&release);
if (ret)
return ret;
surf->surf_create = NULL;
/* remove the surface from the idr, but not the surface id yet */
spin_lock(&qdev->surf_id_idr_lock);
idr_replace(&qdev->surf_id_idr, NULL, surf->surface_id);
spin_unlock(&qdev->surf_id_idr_lock);
surf->hw_surf_alloc = false;
id = surf->surface_id;
surf->surface_id = 0;
release->surface_release_id = id;
cmd = (struct qxl_surface_cmd *)qxl_release_map(qdev, release);
cmd->type = QXL_SURFACE_CMD_DESTROY;
cmd->surface_id = id;
qxl_release_unmap(qdev, release, &cmd->release_info);
qxl_push_command_ring_release(qdev, release, QXL_CMD_SURFACE, false);
qxl_release_fence_buffer_objects(release);
return 0;
}
int qxl_update_surface(struct qxl_device *qdev, struct qxl_bo *surf)
{
struct qxl_rect rect;
int ret;
/* if we are evicting, we need to make sure the surface is up
to date */
rect.left = 0;
rect.right = surf->surf.width;
rect.top = 0;
rect.bottom = surf->surf.height;
retry:
ret = qxl_io_update_area(qdev, surf, &rect);
if (ret == -ERESTARTSYS)
goto retry;
return ret;
}
static void qxl_surface_evict_locked(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area)
{
/* no need to update area if we are just freeing the surface normally */
if (do_update_area)
qxl_update_surface(qdev, surf);
/* nuke the surface id at the hw */
qxl_hw_surface_dealloc(qdev, surf);
}
void qxl_surface_evict(struct qxl_device *qdev, struct qxl_bo *surf, bool do_update_area)
{
mutex_lock(&qdev->surf_evict_mutex);
qxl_surface_evict_locked(qdev, surf, do_update_area);
mutex_unlock(&qdev->surf_evict_mutex);
}
static int qxl_reap_surf(struct qxl_device *qdev, struct qxl_bo *surf, bool stall)
{
int ret;
ret = qxl_bo_reserve(surf, false);
if (ret == -EBUSY)
return -EBUSY;
if (surf->fence.num_active_releases > 0 && stall == false) {
qxl_bo_unreserve(surf);
return -EBUSY;
}
if (stall)
mutex_unlock(&qdev->surf_evict_mutex);
spin_lock(&surf->tbo.bdev->fence_lock);
ret = ttm_bo_wait(&surf->tbo, true, true, !stall);
spin_unlock(&surf->tbo.bdev->fence_lock);
if (stall)
mutex_lock(&qdev->surf_evict_mutex);
if (ret == -EBUSY) {
qxl_bo_unreserve(surf);
return -EBUSY;
}
qxl_surface_evict_locked(qdev, surf, true);
qxl_bo_unreserve(surf);
return 0;
}
static int qxl_reap_surface_id(struct qxl_device *qdev, int max_to_reap)
{
int num_reaped = 0;
int i, ret;
bool stall = false;
int start = 0;
mutex_lock(&qdev->surf_evict_mutex);
again:
spin_lock(&qdev->surf_id_idr_lock);
start = qdev->last_alloced_surf_id + 1;
spin_unlock(&qdev->surf_id_idr_lock);
for (i = start; i < start + qdev->rom->n_surfaces; i++) {
void *objptr;
int surfid = i % qdev->rom->n_surfaces;
/* this avoids the case where the objects is in the
idr but has been evicted half way - its makes
the idr lookup atomic with the eviction */
spin_lock(&qdev->surf_id_idr_lock);
objptr = idr_find(&qdev->surf_id_idr, surfid);
spin_unlock(&qdev->surf_id_idr_lock);
if (!objptr)
continue;
ret = qxl_reap_surf(qdev, objptr, stall);
if (ret == 0)
num_reaped++;
if (num_reaped >= max_to_reap)
break;
}
if (num_reaped == 0 && stall == false) {
stall = true;
goto again;
}
mutex_unlock(&qdev->surf_evict_mutex);
if (num_reaped) {
usleep_range(500, 1000);
qxl_queue_garbage_collect(qdev, true);
}
return 0;
}