/*
* 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
*/
#include <linux/pci.h>
#include <linux/uaccess.h>
#include "qxl_drv.h"
#include "qxl_object.h"
/*
* TODO: allocating a new gem(in qxl_bo) for each request.
* This is wasteful since bo's are page aligned.
*/
int qxl_alloc_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_alloc *qxl_alloc = data;
int ret;
uint32_t handle;
u32 domain = QXL_GEM_DOMAIN_VRAM;
if (qxl_alloc->size == 0) {
DRM_ERROR("invalid size %d\n", qxl_alloc->size);
return -EINVAL;
}
ret = qxl_gem_object_create_with_handle(qdev, file_priv,
domain,
qxl_alloc->size,
NULL,
NULL, &handle);
if (ret) {
DRM_ERROR("%s: failed to create gem ret=%d\n",
__func__, ret);
return -ENOMEM;
}
qxl_alloc->handle = handle;
return 0;
}
int qxl_map_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_map *qxl_map = data;
return drm_gem_ttm_dumb_map_offset(file_priv, &qdev->ddev, qxl_map->handle,
&qxl_map->offset);
}
struct qxl_reloc_info {
int type;
struct qxl_bo *dst_bo;
uint32_t dst_offset;
struct qxl_bo *src_bo;
int src_offset;
};
/*
* dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
* are on vram).
* *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
*/
static void
apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
{
void *reloc_page;
reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
*(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
info->src_bo,
info->src_offset);
qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
}
static void
apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
{
uint32_t id = 0;
void *reloc_page;
if (info->src_bo && !info->src_bo->is_primary)
id = info->src_bo->surface_id;
reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
*(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
}
/* return holding the reference to this object */
static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
struct qxl_release *release, struct qxl_bo **qbo_p)
{
struct drm_gem_object *gobj;
struct qxl_bo *qobj;
int ret;
gobj = drm_gem_object_lookup(file_priv, handle);
if (!gobj)
return -EINVAL;
qobj = gem_to_qxl_bo(gobj);
ret = qxl_release_list_add(release, qobj);
drm_gem_object_put(gobj);
if (ret)
return ret;
*qbo_p = qobj;
return 0;
}
/*
* Usage of execbuffer:
* Relocations need to take into account the full QXLDrawable size.
* However, the command as passed from user space must *not* contain the initial
* QXLReleaseInfo struct (first XXX bytes)
*/
static int qxl_process_single_command(struct qxl_device *qdev,
struct drm_qxl_command *cmd,
struct drm_file *file_priv)
{
struct qxl_reloc_info *reloc_info;
int release_type;
struct qxl_release *release;
struct qxl_bo *cmd_bo;
void *fb_cmd;
int i, ret;
int unwritten;
switch (cmd->type) {
case QXL_CMD_DRAW:
release_type = QXL_RELEASE_DRAWABLE;
break;
case QXL_CMD_SURFACE:
case QXL_CMD_CURSOR:
default:
DRM_DEBUG("Only draw commands in execbuffers\n");
return -EINVAL;
}
if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
return -EINVAL;
if (!access_ok(u64_to_user_ptr(cmd->command),
cmd->command_size))
return -EFAULT;
reloc_info = kmalloc_array(cmd->relocs_num,
sizeof(struct qxl_reloc_info), GFP_KERNEL);
if (!reloc_info)
return -ENOMEM;
ret = qxl_alloc_release_reserved(qdev,
sizeof(union qxl_release_info) +
cmd->command_size,
release_type,
&release,
&cmd_bo);
if (ret)
goto out_free_reloc;
/* TODO copy slow path code from i915 */
fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
unwritten = __copy_from_user_inatomic_nocache
(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
u64_to_user_ptr(cmd->command), cmd->command_size);
{
struct qxl_drawable *draw = fb_cmd;
draw->mm_time = qdev->rom->mm_clock;
}
qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
if (unwritten) {
DRM_ERROR("got unwritten %d\n", unwritten);
ret = -EFAULT;
goto out_free_release;
}
/* fill out reloc info structs */
for (i = 0; i < cmd->relocs_num; ++i) {
struct drm_qxl_reloc reloc;
struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
ret = -EFAULT;
goto out_free_bos;
}
/* add the bos to the list of bos to validate -
need to validate first then process relocs? */
if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
ret = -EINVAL;
goto out_free_bos;
}
reloc_info[i].type = reloc.reloc_type;
if (reloc.dst_handle) {
ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
&reloc_info[i].dst_bo);
if (ret)
goto out_free_bos;
reloc_info[i].dst_offset = reloc.dst_offset;
} else {
reloc_info[i].dst_bo = cmd_bo;
reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
}
/* reserve and validate the reloc dst bo */
if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
&reloc_info[i].src_bo);
if (ret)
goto out_free_bos;
reloc_info[i].src_offset = reloc.src_offset;
} else {
reloc_info[i].src_bo = NULL;
reloc_info[i].src_offset = 0;
}
}
/* validate all buffers */
ret = qxl_release_reserve_list(release, false);
if (ret)
goto out_free_bos;
for (i = 0; i < cmd->relocs_num; ++i) {
if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
apply_reloc(qdev, &reloc_info[i]);
else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
apply_surf_reloc(qdev, &reloc_info[i]);
}
qxl_release_fence_buffer_objects(release);
ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
out_free_bos:
out_free_release:
if (ret)
qxl_release_free(qdev, release);
out_free_reloc:
kfree(reloc_info);
return ret;
}
int qxl_execbuffer_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_execbuffer *execbuffer = data;
struct drm_qxl_command user_cmd;
int cmd_num;
int ret;
for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
struct drm_qxl_command __user *commands =
u64_to_user_ptr(execbuffer->commands);
if (copy_from_user(&user_cmd, commands + cmd_num,
sizeof(user_cmd)))
return -EFAULT;
ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
if (ret)
return ret;
}
return 0;
}
int qxl_update_area_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_update_area *update_area = data;
struct qxl_rect area = {.left = update_area->left,
.top = update_area->top,
.right = update_area->right,
.bottom = update_area->bottom};
int ret;
struct drm_gem_object *gobj = NULL;
struct qxl_bo *qobj = NULL;
struct ttm_operation_ctx ctx = { true, false };
if (update_area->left >= update_area->right ||
update_area->top >= update_area->bottom)
return -EINVAL;
gobj = drm_gem_object_lookup(file, update_area->handle);
if (gobj == NULL)
return -ENOENT;
qobj = gem_to_qxl_bo(gobj);
ret = qxl_bo_reserve(qobj);
if (ret)
goto out;
if (!qobj->tbo.pin_count) {
qxl_ttm_placement_from_domain(qobj, qobj->type);
ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
if (unlikely(ret))
goto out;
}
ret = qxl_bo_check_id(qdev, qobj);
if (ret)
goto out2;
if (!qobj->surface_id)
DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
ret = qxl_io_update_area(qdev, qobj, &area);
out2:
qxl_bo_unreserve(qobj);
out:
drm_gem_object_put(gobj);
return ret;
}
int qxl_getparam_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_getparam *param = data;
switch (param->param) {
case QXL_PARAM_NUM_SURFACES:
param->value = qdev->rom->n_surfaces;
break;
case QXL_PARAM_MAX_RELOCS:
param->value = QXL_MAX_RES;
break;
default:
return -EINVAL;
}
return 0;
}
int qxl_clientcap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct qxl_device *qdev = to_qxl(dev);
struct pci_dev *pdev = to_pci_dev(dev->dev);
struct drm_qxl_clientcap *param = data;
int byte, idx;
byte = param->index / 8;
idx = param->index % 8;
if (pdev->revision < 4)
return -ENOSYS;
if (byte >= 58)
return -ENOSYS;
if (qdev->rom->client_capabilities[byte] & (1 << idx))
return 0;
return -ENOSYS;
}
int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
struct qxl_device *qdev = to_qxl(dev);
struct drm_qxl_alloc_surf *param = data;
int handle;
int ret;
int size, actual_stride;
struct qxl_surface surf;
/* work out size allocate bo with handle */
actual_stride = param->stride < 0 ? -param->stride : param->stride;
size = actual_stride * param->height + actual_stride;
surf.format = param->format;
surf.width = param->width;
surf.height = param->height;
surf.stride = param->stride;
surf.data = 0;
ret = qxl_gem_object_create_with_handle(qdev, file,
QXL_GEM_DOMAIN_SURFACE,
size,
&surf,
NULL, &handle);
if (ret) {
DRM_ERROR("%s: failed to create gem ret=%d\n",
__func__, ret);
return -ENOMEM;
} else
param->handle = handle;
return ret;
}
Codebase Browser
linux