1/**************************************************************************
  2 *
  3 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
  4 * All Rights Reserved.
  5 *
  6 * Permission is hereby granted, free of charge, to any person obtaining a
  7 * copy of this software and associated documentation files (the
  8 * "Software"), to deal in the Software without restriction, including
  9 * without limitation the rights to use, copy, modify, merge, publish,
 10 * distribute, sub license, and/or sell copies of the Software, and to
 11 * permit persons to whom the Software is furnished to do so, subject to
 12 * the following conditions:
 13 *
 14 * The above copyright notice and this permission notice (including the
 15 * next paragraph) shall be included in all copies or substantial portions
 16 * of the Software.
 17 *
 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 25 *
 26 **************************************************************************/
 27
 28#include "vmwgfx_drv.h"
 29#include "ttm/ttm_bo_driver.h"
 30#include "ttm/ttm_placement.h"
 31
 32static uint32_t vram_placement_flags = TTM_PL_FLAG_VRAM |
 33	TTM_PL_FLAG_CACHED;
 34
 35static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
 36	TTM_PL_FLAG_CACHED |
 37	TTM_PL_FLAG_NO_EVICT;
 38
 39static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
 40	TTM_PL_FLAG_CACHED;
 41
 42static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
 43	TTM_PL_FLAG_CACHED;
 44
 45struct ttm_placement vmw_vram_placement = {
 46	.fpfn = 0,
 47	.lpfn = 0,
 48	.num_placement = 1,
 49	.placement = &vram_placement_flags,
 50	.num_busy_placement = 1,
 51	.busy_placement = &vram_placement_flags
 52};
 53
 54static uint32_t vram_gmr_placement_flags[] = {
 55	TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
 56	VMW_PL_FLAG_GMR | TTM_PL_FLAG_CACHED
 57};
 58
 59struct ttm_placement vmw_vram_gmr_placement = {
 60	.fpfn = 0,
 61	.lpfn = 0,
 62	.num_placement = 2,
 63	.placement = vram_gmr_placement_flags,
 64	.num_busy_placement = 1,
 65	.busy_placement = &gmr_placement_flags
 66};
 67
 68struct ttm_placement vmw_vram_sys_placement = {
 69	.fpfn = 0,
 70	.lpfn = 0,
 71	.num_placement = 1,
 72	.placement = &vram_placement_flags,
 73	.num_busy_placement = 1,
 74	.busy_placement = &sys_placement_flags
 75};
 76
 77struct ttm_placement vmw_vram_ne_placement = {
 78	.fpfn = 0,
 79	.lpfn = 0,
 80	.num_placement = 1,
 81	.placement = &vram_ne_placement_flags,
 82	.num_busy_placement = 1,
 83	.busy_placement = &vram_ne_placement_flags
 84};
 85
 86struct ttm_placement vmw_sys_placement = {
 87	.fpfn = 0,
 88	.lpfn = 0,
 89	.num_placement = 1,
 90	.placement = &sys_placement_flags,
 91	.num_busy_placement = 1,
 92	.busy_placement = &sys_placement_flags
 93};
 94
 95struct vmw_ttm_backend {
 96	struct ttm_backend backend;
 97	struct page **pages;
 98	unsigned long num_pages;
 99	struct vmw_private *dev_priv;
100	int gmr_id;
101};
102
103static int vmw_ttm_populate(struct ttm_backend *backend,
104			    unsigned long num_pages, struct page **pages,
105			    struct page *dummy_read_page,
106			    dma_addr_t *dma_addrs)
107{
108	struct vmw_ttm_backend *vmw_be =
109	    container_of(backend, struct vmw_ttm_backend, backend);
110
111	vmw_be->pages = pages;
112	vmw_be->num_pages = num_pages;
113
114	return 0;
115}
116
117static int vmw_ttm_bind(struct ttm_backend *backend, struct ttm_mem_reg *bo_mem)
118{
119	struct vmw_ttm_backend *vmw_be =
120	    container_of(backend, struct vmw_ttm_backend, backend);
121
122	vmw_be->gmr_id = bo_mem->start;
123
124	return vmw_gmr_bind(vmw_be->dev_priv, vmw_be->pages,
125			    vmw_be->num_pages, vmw_be->gmr_id);
126}
127
128static int vmw_ttm_unbind(struct ttm_backend *backend)
129{
130	struct vmw_ttm_backend *vmw_be =
131	    container_of(backend, struct vmw_ttm_backend, backend);
132
133	vmw_gmr_unbind(vmw_be->dev_priv, vmw_be->gmr_id);
134	return 0;
135}
136
137static void vmw_ttm_clear(struct ttm_backend *backend)
138{
139	struct vmw_ttm_backend *vmw_be =
140		container_of(backend, struct vmw_ttm_backend, backend);
141
142	vmw_be->pages = NULL;
143	vmw_be->num_pages = 0;
144}
145
146static void vmw_ttm_destroy(struct ttm_backend *backend)
147{
148	struct vmw_ttm_backend *vmw_be =
149	    container_of(backend, struct vmw_ttm_backend, backend);
150
151	kfree(vmw_be);
152}
153
154static struct ttm_backend_func vmw_ttm_func = {
155	.populate = vmw_ttm_populate,
156	.clear = vmw_ttm_clear,
157	.bind = vmw_ttm_bind,
158	.unbind = vmw_ttm_unbind,
159	.destroy = vmw_ttm_destroy,
160};
161
162struct ttm_backend *vmw_ttm_backend_init(struct ttm_bo_device *bdev)
163{
164	struct vmw_ttm_backend *vmw_be;
165
166	vmw_be = kmalloc(sizeof(*vmw_be), GFP_KERNEL);
167	if (!vmw_be)
168		return NULL;
169
170	vmw_be->backend.func = &vmw_ttm_func;
171	vmw_be->dev_priv = container_of(bdev, struct vmw_private, bdev);
172
173	return &vmw_be->backend;
174}
175
176int vmw_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
177{
178	return 0;
179}
180
181int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
182		      struct ttm_mem_type_manager *man)
183{
184	switch (type) {
185	case TTM_PL_SYSTEM:
186		/* System memory */
187
188		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
189		man->available_caching = TTM_PL_FLAG_CACHED;
190		man->default_caching = TTM_PL_FLAG_CACHED;
191		break;
192	case TTM_PL_VRAM:
193		/* "On-card" video ram */
194		man->func = &ttm_bo_manager_func;
195		man->gpu_offset = 0;
196		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
197		man->available_caching = TTM_PL_FLAG_CACHED;
198		man->default_caching = TTM_PL_FLAG_CACHED;
199		break;
200	case VMW_PL_GMR:
201		/*
202		 * "Guest Memory Regions" is an aperture like feature with
203		 *  one slot per bo. There is an upper limit of the number of
204		 *  slots as well as the bo size.
205		 */
206		man->func = &vmw_gmrid_manager_func;
207		man->gpu_offset = 0;
208		man->flags = TTM_MEMTYPE_FLAG_CMA | TTM_MEMTYPE_FLAG_MAPPABLE;
209		man->available_caching = TTM_PL_FLAG_CACHED;
210		man->default_caching = TTM_PL_FLAG_CACHED;
211		break;
212	default:
213		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
214		return -EINVAL;
215	}
216	return 0;
217}
218
219void vmw_evict_flags(struct ttm_buffer_object *bo,
220		     struct ttm_placement *placement)
221{
222	*placement = vmw_sys_placement;
223}
224
225/**
226 * FIXME: Proper access checks on buffers.
227 */
228
229static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
230{
231	return 0;
232}
233
234static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
235{
236	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
237	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
238
239	mem->bus.addr = NULL;
240	mem->bus.is_iomem = false;
241	mem->bus.offset = 0;
242	mem->bus.size = mem->num_pages << PAGE_SHIFT;
243	mem->bus.base = 0;
244	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
245		return -EINVAL;
246	switch (mem->mem_type) {
247	case TTM_PL_SYSTEM:
248	case VMW_PL_GMR:
249		return 0;
250	case TTM_PL_VRAM:
251		mem->bus.offset = mem->start << PAGE_SHIFT;
252		mem->bus.base = dev_priv->vram_start;
253		mem->bus.is_iomem = true;
254		break;
255	default:
256		return -EINVAL;
257	}
258	return 0;
259}
260
261static void vmw_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
262{
263}
264
265static int vmw_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
266{
267	return 0;
268}
269
270/**
271 * FIXME: We're using the old vmware polling method to sync.
272 * Do this with fences instead.
273 */
274
275static void *vmw_sync_obj_ref(void *sync_obj)
276{
277	return sync_obj;
278}
279
280static void vmw_sync_obj_unref(void **sync_obj)
281{
282	*sync_obj = NULL;
283}
284
285static int vmw_sync_obj_flush(void *sync_obj, void *sync_arg)
286{
287	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
288
289	mutex_lock(&dev_priv->hw_mutex);
290	vmw_write(dev_priv, SVGA_REG_SYNC, SVGA_SYNC_GENERIC);
291	mutex_unlock(&dev_priv->hw_mutex);
292	return 0;
293}
294
295static bool vmw_sync_obj_signaled(void *sync_obj, void *sync_arg)
296{
297	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
298	uint32_t sequence = (unsigned long) sync_obj;
299
300	return vmw_fence_signaled(dev_priv, sequence);
301}
302
303static int vmw_sync_obj_wait(void *sync_obj, void *sync_arg,
304			     bool lazy, bool interruptible)
305{
306	struct vmw_private *dev_priv = (struct vmw_private *)sync_arg;
307	uint32_t sequence = (unsigned long) sync_obj;
308
309	return vmw_wait_fence(dev_priv, false, sequence, false, 3*HZ);
310}
311
312struct ttm_bo_driver vmw_bo_driver = {
313	.create_ttm_backend_entry = vmw_ttm_backend_init,
314	.invalidate_caches = vmw_invalidate_caches,
315	.init_mem_type = vmw_init_mem_type,
316	.evict_flags = vmw_evict_flags,
317	.move = NULL,
318	.verify_access = vmw_verify_access,
319	.sync_obj_signaled = vmw_sync_obj_signaled,
320	.sync_obj_wait = vmw_sync_obj_wait,
321	.sync_obj_flush = vmw_sync_obj_flush,
322	.sync_obj_unref = vmw_sync_obj_unref,
323	.sync_obj_ref = vmw_sync_obj_ref,
324	.move_notify = NULL,
325	.swap_notify = NULL,
326	.fault_reserve_notify = &vmw_ttm_fault_reserve_notify,
327	.io_mem_reserve = &vmw_ttm_io_mem_reserve,
328	.io_mem_free = &vmw_ttm_io_mem_free,
329};