drm/vmwgfx: Add DRM driver for VMware Virtual GPU (fb1d9738) · Commits · e / devices / android_kernel_samsung_smdk4412

drivers/gpu/drm/Makefile

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	@@ -30,4 +30,5 @@ obj-$(CONFIG_DRM_I830) += i830/
	obj-$(CONFIG_DRM_I915) += i915/		obj-$(CONFIG_DRM_I915) += i915/
	obj-$(CONFIG_DRM_SIS) += sis/		obj-$(CONFIG_DRM_SIS) += sis/
	obj-$(CONFIG_DRM_SAVAGE)+= savage/		obj-$(CONFIG_DRM_SAVAGE)+= savage/
			obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
	obj-$(CONFIG_DRM_VIA) +=via/		obj-$(CONFIG_DRM_VIA) +=via/

drivers/gpu/drm/vmwgfx/Kconfig

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+13 −0

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			config DRM_VMWGFX
			tristate "DRM driver for VMware Virtual GPU"
			depends on DRM && PCI
			select FB_DEFERRED_IO
			select FB_CFB_FILLRECT
			select FB_CFB_COPYAREA
			select FB_CFB_IMAGEBLIT
			select DRM_TTM
			help
			KMS enabled DRM driver for SVGA2 virtual hardware.

			If unsure say n. The compiled module will be
			called vmwgfx.ko

drivers/gpu/drm/vmwgfx/Makefile

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+9 −0

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			ccflags-y := -Iinclude/drm

			vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
			vmwgfx_fb.o vmwgfx_ioctl.o vmwgfx_resource.o vmwgfx_buffer.o \
			vmwgfx_fifo.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \
			vmwgfx_overlay.o

			obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o

drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c

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+229 −0

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			/**************************************************************************
			*
			* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
			* All Rights Reserved.
			*
			* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
			* THE COPYRIGHT HOLDERS, AUTHORS 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 "vmwgfx_drv.h"
			#include "ttm/ttm_bo_driver.h"
			#include "ttm/ttm_placement.h"

			static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM \|
			TTM_PL_FLAG_CACHED;

			static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM \|
			TTM_PL_FLAG_CACHED \|
			TTM_PL_FLAG_NO_EVICT;

			static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM \|
			TTM_PL_FLAG_CACHED;

			struct ttm_placement vmw_vram_placement = {
			.fpfn = 0,
			.lpfn = 0,
			.num_placement = 1,
			.placement = &vram_placement_flags,
			.num_busy_placement = 1,
			.busy_placement = &vram_placement_flags
			};

			struct ttm_placement vmw_vram_ne_placement = {
			.fpfn = 0,
			.lpfn = 0,
			.num_placement = 1,
			.placement = &vram_ne_placement_flags,
			.num_busy_placement = 1,
			.busy_placement = &vram_ne_placement_flags
			};

			struct ttm_placement vmw_sys_placement = {
			.fpfn = 0,
			.lpfn = 0,
			.num_placement = 1,
			.placement = &sys_placement_flags,
			.num_busy_placement = 1,
			.busy_placement = &sys_placement_flags
			};

			struct vmw_ttm_backend {
			struct ttm_backend backend;
			};

			static int vmw_ttm_populate(struct ttm_backend *backend,
			unsigned long num_pages, struct page **pages,
			struct page *dummy_read_page)
			{
			return 0;
			}

			static int vmw_ttm_bind(struct ttm_backend backend, struct ttm_mem_reg bo_mem)
			{
			return 0;
			}

			static int vmw_ttm_unbind(struct ttm_backend *backend)
			{
			return 0;
			}

			static void vmw_ttm_clear(struct ttm_backend *backend)
			{
			}

			static void vmw_ttm_destroy(struct ttm_backend *backend)
			{
			struct vmw_ttm_backend *vmw_be =
			container_of(backend, struct vmw_ttm_backend, backend);

			kfree(vmw_be);
			}

			static struct ttm_backend_func vmw_ttm_func = {
			.populate = vmw_ttm_populate,
			.clear = vmw_ttm_clear,
			.bind = vmw_ttm_bind,
			.unbind = vmw_ttm_unbind,
			.destroy = vmw_ttm_destroy,
			};

			struct ttm_backend vmw_ttm_backend_init(struct ttm_bo_device bdev)
			{
			struct vmw_ttm_backend *vmw_be;

			vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
			if (!vmw_be)
			return NULL;

			vmw_be->backend.func = &vmw_ttm_func;

			return &vmw_be->backend;
			}

			int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
			{
			return 0;
			}

			int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
			struct ttm_mem_type_manager *man)
			{
			struct vmw_private *dev_priv =
			container_of(bdev, struct vmw_private, bdev);

			switch (type) {
			case TTM_PL_SYSTEM:
			/* System memory */

			man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
			man->available_caching = TTM_PL_MASK_CACHING;
			man->default_caching = TTM_PL_FLAG_CACHED;
			break;
			case TTM_PL_VRAM:
			/* "On-card" video ram */
			man->gpu_offset = 0;
			man->io_offset = dev_priv->vram_start;
			man->io_size = dev_priv->vram_size;
			man->flags = TTM_MEMTYPE_FLAG_FIXED \|
			TTM_MEMTYPE_FLAG_NEEDS_IOREMAP \| TTM_MEMTYPE_FLAG_MAPPABLE;
			man->io_addr = NULL;
			man->available_caching = TTM_PL_MASK_CACHING;
			man->default_caching = TTM_PL_FLAG_WC;
			break;
			default:
			DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
			return -EINVAL;
			}
			return 0;
			}

			void vmw_evict_flags(struct ttm_buffer_object *bo,
			struct ttm_placement *placement)
			{
			*placement = vmw_sys_placement;
			}

			/**
			* FIXME: Proper access checks on buffers.
			*/

			static int vmw_verify_access(struct ttm_buffer_object bo, struct file filp)
			{
			return 0;
			}

			/**
			* FIXME: We're using the old vmware polling method to sync.
			* Do this with fences instead.
			*/

			static void vmw_sync_obj_ref(void sync_obj)
			{
			return sync_obj;
			}

			static void vmw_sync_obj_unref(void **sync_obj)
			{
			*sync_obj = NULL;
			}

			static int vmw_sync_obj_flush(void sync_obj, void sync_arg)
			{
			struct vmw_private dev_priv = (struct vmw_private )sync_arg;

			mutex_lock(&dev_priv->hw_mutex);
			vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
			mutex_unlock(&dev_priv->hw_mutex);
			return 0;
			}

			static bool vmw_sync_obj_signaled(void sync_obj, void sync_arg)
			{
			struct vmw_private dev_priv = (struct vmw_private )sync_arg;
			uint32_t sequence = (unsigned long) sync_obj;

			return vmw_fence_signaled(dev_priv, sequence);
			}

			static int vmw_sync_obj_wait(void sync_obj, void sync_arg,
			bool lazy, bool interruptible)
			{
			struct vmw_private dev_priv = (struct vmw_private )sync_arg;
			uint32_t sequence = (unsigned long) sync_obj;

			return vmw_wait_fence(dev_priv, false, sequence, false, 3*HZ);
			}

			struct ttm_bo_driver vmw_bo_driver = {
			.create_ttm_backend_entry = vmw_ttm_backend_init,
			.invalidate_caches = vmw_invalidate_caches,
			.init_mem_type = vmw_init_mem_type,
			.evict_flags = vmw_evict_flags,
			.move = NULL,
			.verify_access = vmw_verify_access,
			.sync_obj_signaled = vmw_sync_obj_signaled,
			.sync_obj_wait = vmw_sync_obj_wait,
			.sync_obj_flush = vmw_sync_obj_flush,
			.sync_obj_unref = vmw_sync_obj_unref,
			.sync_obj_ref = vmw_sync_obj_ref
			};