Merge tag 'drm-misc-next-2020-10-27' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.11:

UAPI Changes:

  - doc: rules for EBUSY on non-blocking commits; requirements for fourcc
    modifiers; on parsing EDID
  - fbdev/sbuslib: Remove unused FBIOSCURSOR32
  - fourcc: deprecate DRM_FORMAT_MOD_NONE
  - virtio: Support blob resources for memory allocations; Expose host-visible
    and cross-device features

Cross-subsystem Changes:

  - devicetree: Add vendor Prefix for Yes Optoelectronics, Shanghai Top Display
    Optoelectronics
  - dma-buf: Add struct dma_buf_map that stores DMA pointer and I/O-memory flag;
    dma_buf_vmap()/vunmap() return address in dma_buf_map; Use struct_size() macro

Core Changes:

  - atomic: pass full state to CRTC atomic enable/disable; warn for EBUSY during
    non-blocking commits
  - dp: Prepare for DP 2.0 DPCD
  - dp_mst: Receive extended DPCD caps
  - dma-buf: Documentation
  - doc: Format modifiers; dma-buf-map; Cleanups
  - fbdev: Don't use compat_alloc_user_space(); mark as orphaned
  - fb-helper: Take lock in drm_fb_helper_restore_work_fb()
  - gem: Convert implementation and drivers to GEM object functions, remove
    GEM callbacks from struct drm_driver (expect gem_prime_mmap)
  - panel: Cleanups
  - pci: Add legacy infix to drm_irq_by_busid()
  - sched: Avoid infinite waits in drm_sched_entity_destroy()
  - switcheroo: Cleanups
  - ttm: Remove AGP support; Don't modify caching during swapout; Major
    refactoring of the implementation and API that affects all depending
    drivers; Add ttm_bo_wait_ctx(); Add ttm_bo_pin()/unpin() in favor of
    TTM_PL_FLAG_NO_EVICT; Remove ttm_bo_create(); Remove fault_reserve_notify()
    callback; Push move() implementation into drivers; Remove TTM_PAGE_FLAG_WRITE;
    Replace caching flags with init-time cache setting; Push ttm_tt_bind() into
    drivers; Replace move_notify() with delete_mem_notify(); No overlapping memcpy();
    no more ttm_set_populated()
  - vram-helper: Fix BO top-down placement; TTM-related changes; Init GEM
    object functions with defaults; Default placement in system memory; Cleanups

Driver Changes:

  - amdgpu: Use GEM object functions
  - armada: Use GEM object functions
  - aspeed: Configure output via sysfs; Init struct drm_driver with
  - ast: Reload LUT after FB format changes
  - bridge: Add driver and DT bindings for anx7625; Cleanups
  - bridge/dw-hdmi: Constify ops
  - bridge/ti-sn65dsi86: Add retries for link training
  - bridge/lvds-codec: Add support for regulator
  - bridge/tc358768: Restore connector support DRM_GEM_CMA_DRIVEROPS; Cleanups
  - display/ti,j721e-dss: Add DT properies assigned-clocks, assigned-clocks-parent and
    dma-coherent
  - display/ti,am65s-dss: Add DT properies assigned-clocks, assigned-clocks-parent and
    dma-coherent
  - etnaviv: Use GEM object functions
  - exynos: Use GEM object functions
  - fbdev: Cleanups and compiler fixes throughout framebuffer drivers
  - fbdev/cirrusfb: Avoid division by 0
  - gma500: Use GEM object functions; Fix double-free of connector; Cleanups
  - hisilicon/hibmc: I2C-based DDC support; Use to_hibmc_drm_device(); Cleanups
  - i915: Use GEM object functions
  - imx/dcss: Init driver with DRM_GEM_CMA_DRIVER_OPS; Cleanups
  - ingenic: Reset pixel clock when parent clock changes; support reserved
    memory; Alloc F0 and F1 DMA channels at once; Support different pixel formats;
    Revert support for cached mmap buffers
    on F0/F1; support 30-bit/24-bit/8-bit-palette modes
  - komeda: Use DEFINE_SHOW_ATTRIBUTE
  - mcde: Detect platform_get_irq() errors
  - mediatek: Use GEM object functions
  - msm: Use GEM object functions
  - nouveau: Cleanups; TTM-related changes; Use GEM object functions
  - omapdrm: Use GEM object functions
  - panel: Add driver and DT bindings for Novatak nt36672a; Add driver and DT
    bindings for YTC700TLAG-05-201C; Add driver and DT bindings for TDO TL070WSH30;
    Cleanups
  - panel/mantix: Fix reset; Fix deref of NULL pointer in mantix_get_modes()
  - panel/otm8009a: Allow non-continuous dsi clock; Cleanups
  - panel/rm68200: Allow non-continuous dsi clock; Fix mode to 50 FPS
  - panfrost: Fix job timeout handling; Cleanups
  - pl111: Use GEM object functions
  - qxl: Cleanups; TTM-related changes; Pin new BOs with ttm_bo_init_reserved()
  - radeon: Cleanups; TTM-related changes; Use GEM object functions
  - rockchip: Use GEM object functions
  - shmobile: Cleanups
  - tegra: Use GEM object functions
  - tidss: Set drm_plane_helper_funcs.prepare_fb
  - tilcdc: Don't keep vblank interrupt enabled all the time
  - tve200: Detect platform_get_irq() errors
  - vc4: Use GEM object functions; Only register components once DSI is attached;
    Add Maxime as maintainer
  - vgem: Use GEM object functions
  - via: Simplify critical section in via_mem_alloc()
  - virtgpu: Use GEM object functions
  - virtio: Implement blob resources, host-visible and cross-device features;
    Support mapping of host-allocated resources; Use UUID APi; Cleanups
  - vkms: Use GEM object functions; Switch to SHMEM
  - vmwgfx: TTM-related changes; Inline ttm_bo_swapout_all()
  - xen: Use GEM object functions
  - xlnx: Use GEM object functions

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201027100936.GA4858@linux-uq9g

1 files changed, 164 insertions, 0 deletions

diff --git a/drivers/gpu/drm/virtio/virtgpu_vram.c b/drivers/gpu/drm/virtio/virtgpu_vram.c
new file mode 100644
index 000000000000..23c21bc4d01e
--- /dev/null
+++ b/drivers/gpu/drm/virtio/virtgpu_vram.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "virtgpu_drv.h"
+
+static void virtio_gpu_vram_free(struct drm_gem_object *obj)
+{
+	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
+	struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
+	bool unmap;
+
+	if (bo->created) {
+		spin_lock(&vgdev->host_visible_lock);
+		unmap = drm_mm_node_allocated(&vram->vram_node);
+		spin_unlock(&vgdev->host_visible_lock);
+
+		if (unmap)
+			virtio_gpu_cmd_unmap(vgdev, bo);
+
+		virtio_gpu_cmd_unref_resource(vgdev, bo);
+		virtio_gpu_notify(vgdev);
+		return;
+	}
+}
+
+static const struct vm_operations_struct virtio_gpu_vram_vm_ops = {
+	.open = drm_gem_vm_open,
+	.close = drm_gem_vm_close,
+};
+
+static int virtio_gpu_vram_mmap(struct drm_gem_object *obj,
+				struct vm_area_struct *vma)
+{
+	int ret;
+	struct virtio_gpu_device *vgdev = obj->dev->dev_private;
+	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+	struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
+	unsigned long vm_size = vma->vm_end - vma->vm_start;
+
+	if (!(bo->blob_flags & VIRTGPU_BLOB_FLAG_USE_MAPPABLE))
+		return -EINVAL;
+
+	wait_event(vgdev->resp_wq, vram->map_state != STATE_INITIALIZING);
+	if (vram->map_state != STATE_OK)
+		return -EINVAL;
+
+	vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node);
+	vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND;
+	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
+	vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
+	vma->vm_ops = &virtio_gpu_vram_vm_ops;
+
+	if (vram->map_info == VIRTIO_GPU_MAP_CACHE_WC)
+		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+	else if (vram->map_info == VIRTIO_GPU_MAP_CACHE_UNCACHED)
+		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	/* Partial mappings of GEM buffers don't happen much in practice. */
+	if (vm_size != vram->vram_node.size)
+		return -EINVAL;
+
+	ret = io_remap_pfn_range(vma, vma->vm_start,
+				 vram->vram_node.start >> PAGE_SHIFT,
+				 vm_size, vma->vm_page_prot);
+	return ret;
+}
+
+static const struct drm_gem_object_funcs virtio_gpu_vram_funcs = {
+	.open = virtio_gpu_gem_object_open,
+	.close = virtio_gpu_gem_object_close,
+	.free = virtio_gpu_vram_free,
+	.mmap = virtio_gpu_vram_mmap,
+};
+
+bool virtio_gpu_is_vram(struct virtio_gpu_object *bo)
+{
+	return bo->base.base.funcs == &virtio_gpu_vram_funcs;
+}
+
+static int virtio_gpu_vram_map(struct virtio_gpu_object *bo)
+{
+	int ret;
+	uint64_t offset;
+	struct virtio_gpu_object_array *objs;
+	struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
+	struct virtio_gpu_object_vram *vram = to_virtio_gpu_vram(bo);
+
+	if (!vgdev->has_host_visible)
+		return -EINVAL;
+
+	spin_lock(&vgdev->host_visible_lock);
+	ret = drm_mm_insert_node(&vgdev->host_visible_mm, &vram->vram_node,
+				 bo->base.base.size);
+	spin_unlock(&vgdev->host_visible_lock);
+
+	if (ret)
+		return ret;
+
+	objs = virtio_gpu_array_alloc(1);
+	if (!objs) {
+		ret = -ENOMEM;
+		goto err_remove_node;
+	}
+
+	virtio_gpu_array_add_obj(objs, &bo->base.base);
+	/*TODO: Add an error checking helper function in drm_mm.h */
+	offset = vram->vram_node.start - vgdev->host_visible_region.addr;
+
+	ret = virtio_gpu_cmd_map(vgdev, objs, offset);
+	if (ret) {
+		virtio_gpu_array_put_free(objs);
+		goto err_remove_node;
+	}
+
+	return 0;
+
+err_remove_node:
+	spin_lock(&vgdev->host_visible_lock);
+	drm_mm_remove_node(&vram->vram_node);
+	spin_unlock(&vgdev->host_visible_lock);
+	return ret;
+}
+
+int virtio_gpu_vram_create(struct virtio_gpu_device *vgdev,
+			   struct virtio_gpu_object_params *params,
+			   struct virtio_gpu_object **bo_ptr)
+{
+	struct drm_gem_object *obj;
+	struct virtio_gpu_object_vram *vram;
+	int ret;
+
+	vram = kzalloc(sizeof(*vram), GFP_KERNEL);
+	if (!vram)
+		return -ENOMEM;
+
+	obj = &vram->base.base.base;
+	obj->funcs = &virtio_gpu_vram_funcs;
+	drm_gem_private_object_init(vgdev->ddev, obj, params->size);
+
+	/* Create fake offset */
+	ret = drm_gem_create_mmap_offset(obj);
+	if (ret) {
+		kfree(vram);
+		return ret;
+	}
+
+	ret = virtio_gpu_resource_id_get(vgdev, &vram->base.hw_res_handle);
+	if (ret) {
+		kfree(vram);
+		return ret;
+	}
+
+	virtio_gpu_cmd_resource_create_blob(vgdev, &vram->base, params, NULL,
+					    0);
+	if (params->blob_flags & VIRTGPU_BLOB_FLAG_USE_MAPPABLE) {
+		ret = virtio_gpu_vram_map(&vram->base);
+		if (ret) {
+			virtio_gpu_vram_free(obj);
+			return ret;
+		}
+	}
+
+	*bo_ptr = &vram->base;
+	return 0;
+}