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#include "ttm/ttm_placement.h"

#define VMW_COMPAT_SHADER_HT_ORDER 12

/**

 * enum vmw_compat_shader_state - Staging state for compat shaders

 */

enum vmw_compat_shader_state {

	VMW_COMPAT_COMMITED,

	VMW_COMPAT_ADD,

	VMW_COMPAT_DEL

};

/**

 * struct vmw_compat_shader - Metadata for compat shaders.

 *

 * @handle: The TTM handle of the guest backed shader.

 * @tfile: The struct ttm_object_file the guest backed shader is registered

 * with.

 * @hash: Hash item for lookup.

 * @head: List head for staging lists or the compat shader manager list.

 * @state: Staging state.

 *

 * The structure is protected by the cmdbuf lock.

 */

struct vmw_compat_shader {

	u32 handle;

	struct ttm_object_file *tfile;

	struct drm_hash_item hash;

	struct list_head head;

	enum vmw_compat_shader_state state;

};

/**

 * struct vmw_compat_shader_manager - Compat shader manager.

 *

 * @shaders: Hash table containing staged and commited compat shaders

 * @list: List of commited shaders.

 * @dev_priv: Pointer to a device private structure.

 *

 * @shaders and @list are protected by the cmdbuf mutex for now.

 */

struct vmw_compat_shader_manager {

	struct drm_open_hash shaders;

	struct list_head list;

	struct vmw_private *dev_priv;

};

}

static int vmw_user_shader_alloc(struct vmw_private *dev_priv,

		     struct vmw_dma_buffer *buffer,

		     size_t shader_size,

		     size_t offset,

		     SVGA3dShaderType shader_type,

		     struct ttm_object_file *tfile,

		     u32 *handle)

{

	struct vmw_user_shader *ushader;

	struct vmw_resource *res, *tmp;

	int ret;

	/*

	 * Approximate idr memory usage with 128 bytes. It will be limited

	 * by maximum number_of shaders anyway.

	 */

	if (unlikely(vmw_user_shader_size == 0))

		vmw_user_shader_size =

			ttm_round_pot(sizeof(struct vmw_user_shader)) + 128;

	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),

				   vmw_user_shader_size,

				   false, true);

	if (unlikely(ret != 0)) {

		if (ret != -ERESTARTSYS)

			DRM_ERROR("Out of graphics memory for shader "

				  "creation.\n");

		goto out;

	}

	ushader = kzalloc(sizeof(*ushader), GFP_KERNEL);

	if (unlikely(ushader == NULL)) {

		ttm_mem_global_free(vmw_mem_glob(dev_priv),

				    vmw_user_shader_size);

		ret = -ENOMEM;

		goto out;

	}

	res = &ushader->shader.res;

	ushader->base.shareable = false;

	ushader->base.tfile = NULL;

	/*

	 * From here on, the destructor takes over resource freeing.

	 */

	ret = vmw_gb_shader_init(dev_priv, res, shader_size,

				 offset, shader_type, buffer,

				 vmw_user_shader_free);

	if (unlikely(ret != 0))

		goto out;

	tmp = vmw_resource_reference(res);

	ret = ttm_base_object_init(tfile, &ushader->base, false,

				   VMW_RES_SHADER,

				   &vmw_user_shader_base_release, NULL);

	if (unlikely(ret != 0)) {

		vmw_resource_unreference(&tmp);

		goto out_err;

	}

	if (handle)

		*handle = ushader->base.hash.key;

	vmw_resource_unreference(&res);

out:

	return ret;

}

			       shader_type, tfile, &arg->shader_handle);

out_bad_arg:

	vmw_dmabuf_unreference(&buffer);

 * shader type are within valid bounds.

 * @user_key: User space id of the shader.

 *

static bool vmw_compat_shader_id_ok(u32 user_key, SVGA3dShaderType shader_type)

{

	return user_key <= ((1 << 20) - 1) && (unsigned) shader_type < 16;

/**

 * @shader_type: Shader type.

 *

 */

static u32 vmw_compat_shader_key(u32 user_key, SVGA3dShaderType shader_type)

{

	return user_key | (shader_type << 20);

}

 * vmw_compat_shader_remove - Stage a compat shader for removal.

 *

 * @man: Pointer to the compat shader manager identifying the shader namespace.

 * @user_key: The key that is used to identify the shader. The key is

 * @shader_type: Shader type.

 * @list: Caller's list of staged command buffer resource actions.

 */

int vmw_compat_shader_remove(struct vmw_cmdbuf_res_manager *man,

			     u32 user_key, SVGA3dShaderType shader_type,

			     struct list_head *list)

{

	if (!vmw_compat_shader_id_ok(user_key, shader_type))

		return -EINVAL;

	return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_compat_shader,

				     vmw_compat_shader_key(user_key,

							   shader_type),

				     list);

}

/**

 * vmw_compat_shader_add - Create a compat shader and stage it for addition

 * as a command buffer managed resource.

 *

 * @user_key: The key that is used to identify the shader. The key is

 * @bytecode: Pointer to the bytecode of the shader.

 * @shader_type: Shader type.

 * @tfile: Pointer to a struct ttm_object_file that the guest-backed shader is

 * to be created with.

 * @list: Caller's list of staged command buffer resource actions.

 *

	 */

int vmw_compat_shader_add(struct vmw_private *dev_priv,

			  struct vmw_cmdbuf_res_manager *man,

			  u32 user_key, const void *bytecode,

			  SVGA3dShaderType shader_type,

			  size_t size,

{

	struct vmw_dma_buffer *buf;

	bool is_iomem;

	int ret;

	struct vmw_resource *res;

	if (!vmw_compat_shader_id_ok(user_key, shader_type))

	ret = vmw_dmabuf_init(dev_priv, buf, size, &vmw_sys_ne_placement,

			      true, vmw_dmabuf_bo_free);

	ret = ttm_bo_kmap(&buf->base, 0, PAGE_ALIGN(size) >> PAGE_SHIFT,

		ttm_bo_unreserve(&buf->base);

		goto no_reserve;

	memcpy(ttm_kmap_obj_virtual(&map, &is_iomem), bytecode, size);

	WARN_ON(is_iomem);

	ttm_bo_kunmap(&map);

	ret = ttm_bo_validate(&buf->base, &vmw_sys_placement, false, true);

	WARN_ON(ret != 0);

	ttm_bo_unreserve(&buf->base);

	res = vmw_shader_alloc(dev_priv, buf, size, 0, shader_type);

	if (unlikely(ret != 0))

		goto no_reserve;

	ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_compat_shader,

				 vmw_compat_shader_key(user_key, shader_type),

				 res, list);

	vmw_resource_unreference(&res);

no_reserve:

	vmw_dmabuf_unreference(&buf);

out:

	return ret;

}

/**

 * vmw_compat_shader_lookup - Look up a compat shader

 *

 * @man: Pointer to the command buffer managed resource manager identifying

 * the shader namespace.

 * @user_key: The user space id of the shader.

 * @shader_type: The shader type.

 *

 * Returns a refcounted pointer to a struct vmw_resource if the shader was