drm/vmwgfx: Add DRM driver for VMware Virtual GPU

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/

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

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

/**************************************************************************

 *

 * 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

};