diff options
author | Dave Airlie <airlied@linux.ie> | 2007-07-16 10:05:20 +1000 |
---|---|---|
committer | Dave Airlie <airlied@linux.ie> | 2007-07-16 10:05:20 +1000 |
commit | 2134193af6c29fcb83408b2878facd4b9cc4c4c8 (patch) | |
tree | 694a3fcf065653acd620909a3ecfdd6ac88c98ec /linux-core/drm_bo.c | |
parent | bc7d6c76fab2ff4d2f11b6bd84ca8b8f124729fd (diff) | |
parent | 2c9e05cf4c6eb18c941321f764ed1b282a314ba9 (diff) |
Merge branch 'drm-ttm-cleanup-branch'
Diffstat (limited to 'linux-core/drm_bo.c')
-rw-r--r-- | linux-core/drm_bo.c | 566 |
1 files changed, 402 insertions, 164 deletions
diff --git a/linux-core/drm_bo.c b/linux-core/drm_bo.c index ab257825..2ce3dbca 100644 --- a/linux-core/drm_bo.c +++ b/linux-core/drm_bo.c @@ -202,8 +202,8 @@ static int drm_bo_handle_move_mem(drm_buffer_object_t * bo, if ((bo->mem.mem_type == DRM_BO_MEM_LOCAL) && bo->ttm == NULL) { drm_bo_mem_reg_t *old_mem = &bo->mem; - uint32_t save_flags = old_mem->flags; - uint32_t save_mask = old_mem->mask; + uint64_t save_flags = old_mem->flags; + uint64_t save_mask = old_mem->mask; *old_mem = *mem; mem->mm_node = NULL; @@ -884,7 +884,7 @@ int drm_bo_mem_space(drm_buffer_object_t * bo, EXPORT_SYMBOL(drm_bo_mem_space); static int drm_bo_new_mask(drm_buffer_object_t * bo, - uint32_t new_mask, uint32_t hint) + uint64_t new_mask, uint32_t hint) { uint32_t new_props; @@ -1076,7 +1076,7 @@ static int drm_bo_wait_unfenced(drm_buffer_object_t * bo, int no_wait, */ static void drm_bo_fill_rep_arg(drm_buffer_object_t * bo, - drm_bo_arg_reply_t * rep) + struct drm_bo_info_rep *rep) { rep->handle = bo->base.hash.key; rep->flags = bo->mem.flags; @@ -1104,7 +1104,7 @@ static void drm_bo_fill_rep_arg(drm_buffer_object_t * bo, static int drm_buffer_object_map(drm_file_t * priv, uint32_t handle, uint32_t map_flags, unsigned hint, - drm_bo_arg_reply_t * rep) + struct drm_bo_info_rep *rep) { drm_buffer_object_t *bo; drm_device_t *dev = priv->head->dev; @@ -1351,7 +1351,8 @@ static int drm_bo_check_fake(drm_device_t * dev, drm_bo_mem_reg_t * mem) return 0; } - DRM_ERROR("Illegal fake buffer flags 0x%08x\n", mem->mask); + DRM_ERROR("Illegal fake buffer flags 0x%016llx\n", + (unsigned long long) mem->mask); return -EINVAL; } @@ -1360,22 +1361,45 @@ static int drm_bo_check_fake(drm_device_t * dev, drm_bo_mem_reg_t * mem) */ static int drm_buffer_object_validate(drm_buffer_object_t * bo, + uint32_t fence_class, int move_unfenced, int no_wait) { drm_device_t *dev = bo->dev; drm_buffer_manager_t *bm = &dev->bm; drm_bo_driver_t *driver = dev->driver->bo_driver; + uint32_t ftype; int ret; - DRM_DEBUG("New flags 0x%08x, Old flags 0x%08x\n", bo->mem.mask, - bo->mem.flags); - ret = - driver->fence_type(bo, &bo->fence_class, &bo->fence_type); + DRM_DEBUG("New flags 0x%016llx, Old flags 0x%016llx\n", + (unsigned long long) bo->mem.mask, + (unsigned long long) bo->mem.flags); + + ret = driver->fence_type(bo, &ftype); + if (ret) { DRM_ERROR("Driver did not support given buffer permissions\n"); return ret; } + /* + * We're switching command submission mechanism, + * or cannot simply rely on the hardware serializing for us. + * + * Wait for buffer idle. + */ + + if ((fence_class != bo->fence_class) || + ((ftype ^ bo->fence_type) & bo->fence_type)) { + + ret = drm_bo_wait(bo, 0, 0, no_wait); + + if (ret) + return ret; + + } + + bo->fence_class = fence_class; + bo->fence_type = ftype; ret = drm_bo_wait_unmapped(bo, no_wait); if (ret) return ret; @@ -1465,9 +1489,11 @@ static int drm_buffer_object_validate(drm_buffer_object_t * bo, return 0; } -static int drm_bo_handle_validate(drm_file_t * priv, uint32_t handle, - uint32_t flags, uint32_t mask, uint32_t hint, - drm_bo_arg_reply_t * rep) +static int drm_bo_handle_validate(drm_file_t * priv, + uint32_t handle, + uint32_t fence_class, + uint64_t flags, uint64_t mask, uint32_t hint, + struct drm_bo_info_rep *rep) { struct drm_device *dev = priv->head->dev; drm_buffer_object_t *bo; @@ -1493,7 +1519,8 @@ static int drm_bo_handle_validate(drm_file_t * priv, uint32_t handle, goto out; ret = - drm_buffer_object_validate(bo, !(hint & DRM_BO_HINT_DONT_FENCE), + drm_buffer_object_validate(bo, fence_class, + !(hint & DRM_BO_HINT_DONT_FENCE), no_wait); drm_bo_fill_rep_arg(bo, rep); @@ -1505,8 +1532,8 @@ static int drm_bo_handle_validate(drm_file_t * priv, uint32_t handle, return ret; } -static int drm_bo_handle_info(drm_file_t * priv, uint32_t handle, - drm_bo_arg_reply_t * rep) +static int drm_bo_handle_info(drm_file_t *priv, uint32_t handle, + struct drm_bo_info_rep *rep) { struct drm_device *dev = priv->head->dev; drm_buffer_object_t *bo; @@ -1527,8 +1554,9 @@ static int drm_bo_handle_info(drm_file_t * priv, uint32_t handle, return 0; } -static int drm_bo_handle_wait(drm_file_t * priv, uint32_t handle, - uint32_t hint, drm_bo_arg_reply_t * rep) +static int drm_bo_handle_wait(drm_file_t *priv, uint32_t handle, + uint32_t hint, + struct drm_bo_info_rep *rep) { struct drm_device *dev = priv->head->dev; drm_buffer_object_t *bo; @@ -1562,7 +1590,7 @@ static int drm_bo_handle_wait(drm_file_t * priv, uint32_t handle, int drm_buffer_object_create(drm_device_t *dev, unsigned long size, drm_bo_type_t type, - uint32_t mask, + uint64_t mask, uint32_t hint, uint32_t page_alignment, unsigned long buffer_start, @@ -1614,8 +1642,8 @@ int drm_buffer_object_create(drm_device_t *dev, bo->buffer_start = buffer_start; } bo->priv_flags = 0; - bo->mem.flags = 0; - bo->mem.mask = 0; + bo->mem.flags = 0ULL; + bo->mem.mask = 0ULL; atomic_inc(&bm->count); ret = drm_bo_new_mask(bo, mask, hint); @@ -1629,7 +1657,7 @@ int drm_buffer_object_create(drm_device_t *dev, if (ret) goto out_err; } - ret = drm_buffer_object_validate(bo, 0, hint & DRM_BO_HINT_DONT_BLOCK); + ret = drm_buffer_object_validate(bo, 0, 0, hint & DRM_BO_HINT_DONT_BLOCK); if (ret) goto out_err; @@ -1671,15 +1699,14 @@ static int drm_bo_lock_test(drm_device_t * dev, struct file *filp) return 0; } -int drm_bo_ioctl(DRM_IOCTL_ARGS) +int drm_bo_op_ioctl(DRM_IOCTL_ARGS) { DRM_DEVICE; - drm_bo_arg_t arg; - drm_bo_arg_request_t *req = &arg.d.req; - drm_bo_arg_reply_t rep; + struct drm_bo_op_arg arg; + struct drm_bo_op_req *req = &arg.d.req; + struct drm_bo_info_rep rep; unsigned long next; - drm_user_object_t *uo; - drm_buffer_object_t *entry; + int ret; if (!dev->bm.initialized) { DRM_ERROR("Buffer object manager is not initialized.\n"); @@ -1694,97 +1721,29 @@ int drm_bo_ioctl(DRM_IOCTL_ARGS) continue; } - rep.ret = 0; + ret = 0; switch (req->op) { - case drm_bo_create: - rep.ret = drm_bo_lock_test(dev, filp); - if (rep.ret) - break; - rep.ret = - drm_buffer_object_create(priv->head->dev, - req->size, - req->type, - req->mask, - req->hint, - req->page_alignment, - req->buffer_start, &entry); - if (rep.ret) - break; - - rep.ret = - drm_bo_add_user_object(priv, entry, - req-> - mask & - DRM_BO_FLAG_SHAREABLE); - if (rep.ret) - drm_bo_usage_deref_unlocked(&entry); - - if (rep.ret) - break; - - mutex_lock(&entry->mutex); - drm_bo_fill_rep_arg(entry, &rep); - mutex_unlock(&entry->mutex); - break; - case drm_bo_unmap: - rep.ret = drm_buffer_object_unmap(priv, req->handle); - break; - case drm_bo_map: - rep.ret = drm_buffer_object_map(priv, req->handle, - req->mask, - req->hint, &rep); - break; - case drm_bo_destroy: - mutex_lock(&dev->struct_mutex); - uo = drm_lookup_user_object(priv, req->handle); - if (!uo || (uo->type != drm_buffer_type) - || uo->owner != priv) { - mutex_unlock(&dev->struct_mutex); - rep.ret = -EINVAL; - break; - } - rep.ret = drm_remove_user_object(priv, uo); - mutex_unlock(&dev->struct_mutex); - break; - case drm_bo_reference: - rep.ret = drm_user_object_ref(priv, req->handle, - drm_buffer_type, &uo); - if (rep.ret) - break; - - rep.ret = drm_bo_handle_info(priv, req->handle, &rep); - break; - case drm_bo_unreference: - rep.ret = drm_user_object_unref(priv, req->handle, - drm_buffer_type); - break; case drm_bo_validate: - rep.ret = drm_bo_lock_test(dev, filp); - - if (rep.ret) + ret = drm_bo_lock_test(dev, filp); + if (ret) break; - rep.ret = - drm_bo_handle_validate(priv, req->handle, req->mask, - req->arg_handle, req->hint, - &rep); + ret = drm_bo_handle_validate(priv, req->bo_req.handle, + req->bo_req.fence_class, + req->bo_req.flags, + req->bo_req.mask, + req->bo_req.hint, + &rep); break; case drm_bo_fence: - rep.ret = drm_bo_lock_test(dev, filp); - if (rep.ret) - break; - /**/ break; - case drm_bo_info: - rep.ret = drm_bo_handle_info(priv, req->handle, &rep); - break; - case drm_bo_wait_idle: - rep.ret = drm_bo_handle_wait(priv, req->handle, - req->hint, &rep); + ret = -EINVAL; + DRM_ERROR("Function is not implemented yet.\n"); break; case drm_bo_ref_fence: - rep.ret = -EINVAL; + ret = -EINVAL; DRM_ERROR("Function is not implemented yet.\n"); + break; default: - rep.ret = -EINVAL; + ret = -EINVAL; } next = arg.next; @@ -1792,17 +1751,221 @@ int drm_bo_ioctl(DRM_IOCTL_ARGS) * A signal interrupted us. Make sure the ioctl is restartable. */ - if (rep.ret == -EAGAIN) + if (ret == -EAGAIN) return -EAGAIN; arg.handled = 1; - arg.d.rep = rep; + arg.d.rep.ret = ret; + arg.d.rep.bo_info = rep; DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); data = next; } while (data); return 0; } +int drm_bo_create_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_create_arg arg; + struct drm_bo_create_req *req = &arg.d.req; + struct drm_bo_info_rep *rep = &arg.d.rep; + drm_buffer_object_t *entry; + int ret = 0; + + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_bo_lock_test(dev, filp); + if (ret) + goto out; + + ret = drm_buffer_object_create(priv->head->dev, + req->size, req->type, req->mask, + req->hint, req->page_alignment, + req->buffer_start, &entry); + if (ret) + goto out; + + ret = drm_bo_add_user_object(priv, entry, + req->mask & DRM_BO_FLAG_SHAREABLE); + if (ret) { + drm_bo_usage_deref_unlocked(&entry); + goto out; + } + + mutex_lock(&entry->mutex); + drm_bo_fill_rep_arg(entry, rep); + mutex_unlock(&entry->mutex); + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); +out: + return ret; +} + + +int drm_bo_destroy_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_handle_arg arg; + drm_user_object_t *uo; + int ret = 0; + + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + mutex_lock(&dev->struct_mutex); + uo = drm_lookup_user_object(priv, arg.handle); + if (!uo || (uo->type != drm_buffer_type) || uo->owner != priv) { + mutex_unlock(&dev->struct_mutex); + return -EINVAL; + } + ret = drm_remove_user_object(priv, uo); + mutex_unlock(&dev->struct_mutex); + + return ret; +} + +int drm_bo_map_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_map_wait_idle_arg arg; + struct drm_bo_info_req *req = &arg.d.req; + struct drm_bo_info_rep *rep = &arg.d.rep; + int ret; + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_buffer_object_map(priv, req->handle, req->mask, + req->hint, rep); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_bo_unmap_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_handle_arg arg; + int ret; + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_buffer_object_unmap(priv, arg.handle); + return ret; +} + + +int drm_bo_reference_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_reference_info_arg arg; + struct drm_bo_handle_arg *req = &arg.d.req; + struct drm_bo_info_rep *rep = &arg.d.rep; + drm_user_object_t *uo; + int ret; + + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_user_object_ref(priv, req->handle, + drm_buffer_type, &uo); + if (ret) + return ret; + + ret = drm_bo_handle_info(priv, req->handle, rep); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_bo_unreference_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_handle_arg arg; + int ret = 0; + + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_user_object_unref(priv, arg.handle, drm_buffer_type); + return ret; +} + +int drm_bo_info_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_reference_info_arg arg; + struct drm_bo_handle_arg *req = &arg.d.req; + struct drm_bo_info_rep *rep = &arg.d.rep; + int ret; + + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_bo_handle_info(priv, req->handle, rep); + if (ret) + return ret; + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_bo_wait_idle_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_bo_map_wait_idle_arg arg; + struct drm_bo_info_req *req = &arg.d.req; + struct drm_bo_info_rep *rep = &arg.d.rep; + int ret; + if (!dev->bm.initialized) { + DRM_ERROR("Buffer object manager is not initialized.\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + ret = drm_bo_handle_wait(priv, req->handle, + req->hint, rep); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + + + /** *Clean the unfenced list and put on regular LRU. *This is part of the memory manager cleanup and should only be @@ -2175,11 +2338,67 @@ EXPORT_SYMBOL(drm_bo_driver_init); int drm_mm_init_ioctl(DRM_IOCTL_ARGS) { DRM_DEVICE; + struct drm_mm_init_arg arg; + drm_buffer_manager_t *bm = &dev->bm; + drm_bo_driver_t *driver = dev->driver->bo_driver; + int ret; - int ret = 0; - drm_mm_init_arg_t arg; + if (!driver) { + DRM_ERROR("Buffer objects are not supported by this driver\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + ret = -EINVAL; + if (arg.magic != DRM_BO_INIT_MAGIC) { + DRM_ERROR("You are using an old libdrm that is not compatible with\n" + "\tthe kernel DRM module. Please upgrade your libdrm.\n"); + return -EINVAL; + } + if (arg.major != DRM_BO_INIT_MAJOR) { + DRM_ERROR("libdrm and kernel DRM buffer object interface major\n" + "\tversion don't match. Got %d, expected %d,\n", + arg.major, DRM_BO_INIT_MAJOR); + return -EINVAL; + } + if (arg.minor > DRM_BO_INIT_MINOR) { + DRM_ERROR("libdrm expects a newer DRM buffer object interface.\n" + "\tlibdrm buffer object interface version is %d.%d.\n" + "\tkernel DRM buffer object interface version is %d.%d\n", + arg.major, arg.minor, DRM_BO_INIT_MAJOR, DRM_BO_INIT_MINOR); + return -EINVAL; + } + + mutex_lock(&dev->bm.init_mutex); + mutex_lock(&dev->struct_mutex); + if (!bm->initialized) { + DRM_ERROR("DRM memory manager was not initialized.\n"); + goto out; + } + if (arg.mem_type == 0) { + DRM_ERROR("System memory buffers already initialized.\n"); + goto out; + } + ret = drm_bo_init_mm(dev, arg.mem_type, + arg.p_offset, arg.p_size); + +out: + mutex_unlock(&dev->struct_mutex); + mutex_unlock(&dev->bm.init_mutex); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_mm_takedown_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_mm_type_arg arg; drm_buffer_manager_t *bm = &dev->bm; drm_bo_driver_t *driver = dev->driver->bo_driver; + int ret; if (!driver) { DRM_ERROR("Buffer objects are not supported by this driver\n"); @@ -2188,59 +2407,78 @@ int drm_mm_init_ioctl(DRM_IOCTL_ARGS) DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); - switch (arg.req.op) { - case mm_init: - ret = -EINVAL; - mutex_lock(&dev->bm.init_mutex); - mutex_lock(&dev->struct_mutex); - if (!bm->initialized) { - DRM_ERROR("DRM memory manager was not initialized.\n"); - break; - } - if (arg.req.mem_type == 0) { - DRM_ERROR - ("System memory buffers already initialized.\n"); - break; - } - ret = drm_bo_init_mm(dev, arg.req.mem_type, - arg.req.p_offset, arg.req.p_size); - break; - case mm_takedown: - LOCK_TEST_WITH_RETURN(dev, filp); - mutex_lock(&dev->bm.init_mutex); - mutex_lock(&dev->struct_mutex); - ret = -EINVAL; - if (!bm->initialized) { - DRM_ERROR("DRM memory manager was not initialized\n"); - break; - } - if (arg.req.mem_type == 0) { - DRM_ERROR("No takedown for System memory buffers.\n"); - break; - } - ret = 0; - if (drm_bo_clean_mm(dev, arg.req.mem_type)) { - DRM_ERROR("Memory manager type %d not clean. " - "Delaying takedown\n", arg.req.mem_type); - } - break; - case mm_lock: - LOCK_TEST_WITH_RETURN(dev, filp); - mutex_lock(&dev->bm.init_mutex); - mutex_lock(&dev->struct_mutex); - ret = drm_bo_lock_mm(dev, arg.req.mem_type); - break; - case mm_unlock: - LOCK_TEST_WITH_RETURN(dev, filp); - mutex_lock(&dev->bm.init_mutex); - mutex_lock(&dev->struct_mutex); - ret = 0; - break; - default: - DRM_ERROR("Function not implemented yet\n"); + LOCK_TEST_WITH_RETURN(dev, filp); + mutex_lock(&dev->bm.init_mutex); + mutex_lock(&dev->struct_mutex); + ret = -EINVAL; + if (!bm->initialized) { + DRM_ERROR("DRM memory manager was not initialized\n"); + goto out; + } + if (arg.mem_type == 0) { + DRM_ERROR("No takedown for System memory buffers.\n"); + goto out; + } + ret = 0; + if (drm_bo_clean_mm(dev, arg.mem_type)) { + DRM_ERROR("Memory manager type %d not clean. " + "Delaying takedown\n", arg.mem_type); + } +out: + mutex_unlock(&dev->struct_mutex); + mutex_unlock(&dev->bm.init_mutex); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_mm_lock_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_mm_type_arg arg; + drm_bo_driver_t *driver = dev->driver->bo_driver; + int ret; + + if (!driver) { + DRM_ERROR("Buffer objects are not supported by this driver\n"); + return -EINVAL; + } + + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + + LOCK_TEST_WITH_RETURN(dev, filp); + mutex_lock(&dev->bm.init_mutex); + mutex_lock(&dev->struct_mutex); + ret = drm_bo_lock_mm(dev, arg.mem_type); + mutex_unlock(&dev->struct_mutex); + mutex_unlock(&dev->bm.init_mutex); + if (ret) + return ret; + + DRM_COPY_TO_USER_IOCTL((void __user *)data, arg, sizeof(arg)); + return 0; +} + +int drm_mm_unlock_ioctl(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + struct drm_mm_type_arg arg; + drm_bo_driver_t *driver = dev->driver->bo_driver; + int ret; + + if (!driver) { + DRM_ERROR("Buffer objects are not supported by this driver\n"); return -EINVAL; } + DRM_COPY_FROM_USER_IOCTL(arg, (void __user *)data, sizeof(arg)); + LOCK_TEST_WITH_RETURN(dev, filp); + mutex_lock(&dev->bm.init_mutex); + mutex_lock(&dev->struct_mutex); + ret = 0; + mutex_unlock(&dev->struct_mutex); mutex_unlock(&dev->bm.init_mutex); if (ret) |