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-rw-r--r--drivers/gpu/drm/vmwgfx/Makefile2
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c13
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.c17
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.h31
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_mob.c570
5 files changed, 632 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile
index 9f8b690bcf52..5d892e76117b 100644
--- a/drivers/gpu/drm/vmwgfx/Makefile
+++ b/drivers/gpu/drm/vmwgfx/Makefile
@@ -6,6 +6,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
6 vmwgfx_fifo.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \ 6 vmwgfx_fifo.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \
7 vmwgfx_overlay.o vmwgfx_marker.o vmwgfx_gmrid_manager.o \ 7 vmwgfx_overlay.o vmwgfx_marker.o vmwgfx_gmrid_manager.o \
8 vmwgfx_fence.o vmwgfx_dmabuf.o vmwgfx_scrn.o vmwgfx_context.o \ 8 vmwgfx_fence.o vmwgfx_dmabuf.o vmwgfx_scrn.o vmwgfx_context.o \
9 vmwgfx_surface.o vmwgfx_prime.o 9 vmwgfx_surface.o vmwgfx_prime.o vmwgfx_mob.o
10 10
11obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o 11obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
index 2d61a2d86bd7..92ae4c5894c5 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
@@ -40,6 +40,10 @@ static uint32_t vram_ne_placement_flags = TTM_PL_FLAG_VRAM |
40static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM | 40static uint32_t sys_placement_flags = TTM_PL_FLAG_SYSTEM |
41 TTM_PL_FLAG_CACHED; 41 TTM_PL_FLAG_CACHED;
42 42
43static uint32_t sys_ne_placement_flags = TTM_PL_FLAG_SYSTEM |
44 TTM_PL_FLAG_CACHED |
45 TTM_PL_FLAG_NO_EVICT;
46
43static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR | 47static uint32_t gmr_placement_flags = VMW_PL_FLAG_GMR |
44 TTM_PL_FLAG_CACHED; 48 TTM_PL_FLAG_CACHED;
45 49
@@ -116,6 +120,15 @@ struct ttm_placement vmw_sys_placement = {
116 .busy_placement = &sys_placement_flags 120 .busy_placement = &sys_placement_flags
117}; 121};
118 122
123struct ttm_placement vmw_sys_ne_placement = {
124 .fpfn = 0,
125 .lpfn = 0,
126 .num_placement = 1,
127 .placement = &sys_ne_placement_flags,
128 .num_busy_placement = 1,
129 .busy_placement = &sys_ne_placement_flags
130};
131
119static uint32_t evictable_placement_flags[] = { 132static uint32_t evictable_placement_flags[] = {
120 TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED, 133 TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED,
121 TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED, 134 TTM_PL_FLAG_VRAM | TTM_PL_FLAG_CACHED,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 6e8cb1481376..24df6d6e0c08 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -327,6 +327,14 @@ static int vmw_request_device(struct vmw_private *dev_priv)
327 return ret; 327 return ret;
328 } 328 }
329 vmw_fence_fifo_up(dev_priv->fman); 329 vmw_fence_fifo_up(dev_priv->fman);
330 if (dev_priv->has_mob) {
331 ret = vmw_otables_setup(dev_priv);
332 if (unlikely(ret != 0)) {
333 DRM_ERROR("Unable to initialize "
334 "guest Memory OBjects.\n");
335 goto out_no_mob;
336 }
337 }
330 ret = vmw_dummy_query_bo_create(dev_priv); 338 ret = vmw_dummy_query_bo_create(dev_priv);
331 if (unlikely(ret != 0)) 339 if (unlikely(ret != 0))
332 goto out_no_query_bo; 340 goto out_no_query_bo;
@@ -335,6 +343,9 @@ static int vmw_request_device(struct vmw_private *dev_priv)
335 return 0; 343 return 0;
336 344
337out_no_query_bo: 345out_no_query_bo:
346 if (dev_priv->has_mob)
347 vmw_otables_takedown(dev_priv);
348out_no_mob:
338 vmw_fence_fifo_down(dev_priv->fman); 349 vmw_fence_fifo_down(dev_priv->fman);
339 vmw_fifo_release(dev_priv, &dev_priv->fifo); 350 vmw_fifo_release(dev_priv, &dev_priv->fifo);
340 return ret; 351 return ret;
@@ -350,10 +361,13 @@ static void vmw_release_device(struct vmw_private *dev_priv)
350 BUG_ON(dev_priv->pinned_bo != NULL); 361 BUG_ON(dev_priv->pinned_bo != NULL);
351 362
352 ttm_bo_unref(&dev_priv->dummy_query_bo); 363 ttm_bo_unref(&dev_priv->dummy_query_bo);
364 if (dev_priv->has_mob)
365 vmw_otables_takedown(dev_priv);
353 vmw_fence_fifo_down(dev_priv->fman); 366 vmw_fence_fifo_down(dev_priv->fman);
354 vmw_fifo_release(dev_priv, &dev_priv->fifo); 367 vmw_fifo_release(dev_priv, &dev_priv->fifo);
355} 368}
356 369
370
357/** 371/**
358 * Increase the 3d resource refcount. 372 * Increase the 3d resource refcount.
359 * If the count was prevously zero, initialize the fifo, switching to svga 373 * If the count was prevously zero, initialize the fifo, switching to svga
@@ -690,6 +704,9 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
690 dev_priv->has_gmr = false; 704 dev_priv->has_gmr = false;
691 } 705 }
692 706
707 if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
708 dev_priv->has_mob = true;
709
693 dev_priv->mmio_mtrr = arch_phys_wc_add(dev_priv->mmio_start, 710 dev_priv->mmio_mtrr = arch_phys_wc_add(dev_priv->mmio_start,
694 dev_priv->mmio_size); 711 dev_priv->mmio_size);
695 712
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 486adaf235d0..518f8f5e2612 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -51,6 +51,16 @@
51#define VMWGFX_MAX_DISPLAYS 16 51#define VMWGFX_MAX_DISPLAYS 16
52#define VMWGFX_CMD_BOUNCE_INIT_SIZE 32768 52#define VMWGFX_CMD_BOUNCE_INIT_SIZE 32768
53 53
54/*
55 * Perhaps we should have sysfs entries for these.
56 */
57#define VMWGFX_NUM_GB_CONTEXT 256
58#define VMWGFX_NUM_GB_SHADER 20000
59#define VMWGFX_NUM_GB_SURFACE 32768
60#define VMWGFX_NUM_MOB (VMWGFX_NUM_GB_CONTEXT +\
61 VMWGFX_NUM_GB_SHADER +\
62 VMWGFX_NUM_GB_SURFACE)
63
54#define VMW_PL_GMR TTM_PL_PRIV0 64#define VMW_PL_GMR TTM_PL_PRIV0
55#define VMW_PL_FLAG_GMR TTM_PL_FLAG_PRIV0 65#define VMW_PL_FLAG_GMR TTM_PL_FLAG_PRIV0
56 66
@@ -295,6 +305,7 @@ struct vmw_private {
295 uint32_t max_gmr_pages; 305 uint32_t max_gmr_pages;
296 uint32_t memory_size; 306 uint32_t memory_size;
297 bool has_gmr; 307 bool has_gmr;
308 bool has_mob;
298 struct mutex hw_mutex; 309 struct mutex hw_mutex;
299 310
300 /* 311 /*
@@ -415,6 +426,12 @@ struct vmw_private {
415 * DMA mapping stuff. 426 * DMA mapping stuff.
416 */ 427 */
417 enum vmw_dma_map_mode map_mode; 428 enum vmw_dma_map_mode map_mode;
429
430 /*
431 * Guest Backed stuff
432 */
433 struct ttm_buffer_object *otable_bo;
434 struct vmw_otable *otables;
418}; 435};
419 436
420static inline struct vmw_surface *vmw_res_to_srf(struct vmw_resource *res) 437static inline struct vmw_surface *vmw_res_to_srf(struct vmw_resource *res)
@@ -622,6 +639,7 @@ extern struct ttm_placement vmw_vram_sys_placement;
622extern struct ttm_placement vmw_vram_gmr_placement; 639extern struct ttm_placement vmw_vram_gmr_placement;
623extern struct ttm_placement vmw_vram_gmr_ne_placement; 640extern struct ttm_placement vmw_vram_gmr_ne_placement;
624extern struct ttm_placement vmw_sys_placement; 641extern struct ttm_placement vmw_sys_placement;
642extern struct ttm_placement vmw_sys_ne_placement;
625extern struct ttm_placement vmw_evictable_placement; 643extern struct ttm_placement vmw_evictable_placement;
626extern struct ttm_placement vmw_srf_placement; 644extern struct ttm_placement vmw_srf_placement;
627extern struct ttm_bo_driver vmw_bo_driver; 645extern struct ttm_bo_driver vmw_bo_driver;
@@ -832,6 +850,19 @@ extern int vmw_prime_handle_to_fd(struct drm_device *dev,
832 uint32_t handle, uint32_t flags, 850 uint32_t handle, uint32_t flags,
833 int *prime_fd); 851 int *prime_fd);
834 852
853/*
854 * MemoryOBject management - vmwgfx_mob.c
855 */
856struct vmw_mob;
857extern int vmw_mob_bind(struct vmw_private *dev_priv, struct vmw_mob *mob,
858 struct page **data_pages, unsigned long num_data_pages,
859 int32_t mob_id);
860extern void vmw_mob_unbind(struct vmw_private *dev_priv,
861 struct vmw_mob *mob);
862extern void vmw_mob_destroy(struct vmw_mob *mob);
863extern struct vmw_mob *vmw_mob_create(unsigned long data_pages);
864extern int vmw_otables_setup(struct vmw_private *dev_priv);
865extern void vmw_otables_takedown(struct vmw_private *dev_priv);
835 866
836/** 867/**
837 * Inline helper functions 868 * Inline helper functions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
new file mode 100644
index 000000000000..34450867d2da
--- /dev/null
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
@@ -0,0 +1,570 @@
1/**************************************************************************
2 *
3 * Copyright © 2012 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
30/*
31 * Currently the MOB interface does not support 64-bit page frame numbers.
32 * This might change in the future to be similar to the GMR2 interface
33 * when virtual machines support memory beyond 16TB.
34 */
35
36#define VMW_PPN_SIZE 4
37
38/*
39 * struct vmw_mob - Structure containing page table and metadata for a
40 * Guest Memory OBject.
41 *
42 * @num_pages Number of pages that make up the page table.
43 * @pt_level The indirection level of the page table. 0-2.
44 * @pt_root_page Pointer to the level 0 page of the page table.
45 */
46struct vmw_mob {
47 struct ttm_buffer_object *pt_bo;
48 unsigned long num_pages;
49 unsigned pt_level;
50 struct page *pt_root_page;
51 uint32_t id;
52};
53
54/*
55 * struct vmw_otable - Guest Memory OBject table metadata
56 *
57 * @size: Size of the table (page-aligned).
58 * @page_table: Pointer to a struct vmw_mob holding the page table.
59 */
60struct vmw_otable {
61 unsigned long size;
62 struct vmw_mob *page_table;
63};
64
65static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
66 struct vmw_mob *mob);
67static void vmw_mob_pt_setup(struct vmw_mob *mob,
68 struct page **data_pages,
69 unsigned long num_data_pages);
70
71/*
72 * vmw_setup_otable_base - Issue an object table base setup command to
73 * the device
74 *
75 * @dev_priv: Pointer to a device private structure
76 * @type: Type of object table base
77 * @offset Start of table offset into dev_priv::otable_bo
78 * @otable Pointer to otable metadata;
79 *
80 * This function returns -ENOMEM if it fails to reserve fifo space,
81 * and may block waiting for fifo space.
82 */
83static int vmw_setup_otable_base(struct vmw_private *dev_priv,
84 SVGAOTableType type,
85 unsigned long offset,
86 struct vmw_otable *otable)
87{
88 struct {
89 SVGA3dCmdHeader header;
90 SVGA3dCmdSetOTableBase body;
91 } *cmd;
92 struct page **pages = dev_priv->otable_bo->ttm->pages +
93 (offset >> PAGE_SHIFT);
94 struct vmw_mob *mob;
95 int ret;
96
97 BUG_ON(otable->page_table != NULL);
98
99 mob = vmw_mob_create(otable->size >> PAGE_SHIFT);
100 if (unlikely(mob == NULL)) {
101 DRM_ERROR("Failed creating OTable page table.\n");
102 return -ENOMEM;
103 }
104
105 if (otable->size <= PAGE_SIZE) {
106 mob->pt_level = 0;
107 mob->pt_root_page = pages[0];
108 } else {
109 ret = vmw_mob_pt_populate(dev_priv, mob);
110 if (unlikely(ret != 0))
111 goto out_no_populate;
112
113 vmw_mob_pt_setup(mob, pages,
114 otable->size >> PAGE_SHIFT);
115 }
116
117 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
118 if (unlikely(cmd == NULL)) {
119 DRM_ERROR("Failed reserving FIFO space for OTable setup.\n");
120 goto out_no_fifo;
121 }
122
123 memset(cmd, 0, sizeof(*cmd));
124 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
125 cmd->header.size = sizeof(cmd->body);
126 cmd->body.type = type;
127 cmd->body.baseAddress = page_to_pfn(mob->pt_root_page);
128 cmd->body.sizeInBytes = otable->size;
129 cmd->body.validSizeInBytes = 0;
130 cmd->body.ptDepth = mob->pt_level;
131
132 vmw_fifo_commit(dev_priv, sizeof(*cmd));
133 otable->page_table = mob;
134
135 return 0;
136
137out_no_fifo:
138out_no_populate:
139 vmw_mob_destroy(mob);
140 return ret;
141}
142
143/*
144 * vmw_takedown_otable_base - Issue an object table base takedown command
145 * to the device
146 *
147 * @dev_priv: Pointer to a device private structure
148 * @type: Type of object table base
149 *
150 */
151static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
152 SVGAOTableType type,
153 struct vmw_otable *otable)
154{
155 struct {
156 SVGA3dCmdHeader header;
157 SVGA3dCmdSetOTableBase body;
158 } *cmd;
159 struct ttm_buffer_object *bo = otable->page_table->pt_bo;
160
161 if (otable->page_table == NULL)
162 return;
163
164 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
165 if (unlikely(cmd == NULL))
166 DRM_ERROR("Failed reserving FIFO space for OTable setup.\n");
167
168 memset(cmd, 0, sizeof(*cmd));
169 cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
170 cmd->header.size = sizeof(cmd->body);
171 cmd->body.type = type;
172 cmd->body.baseAddress = 0;
173 cmd->body.sizeInBytes = 0;
174 cmd->body.validSizeInBytes = 0;
175 cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID;
176 vmw_fifo_commit(dev_priv, sizeof(*cmd));
177
178 if (bo) {
179 int ret;
180
181 ret = ttm_bo_reserve(bo, false, true, false, false);
182 BUG_ON(ret != 0);
183
184 vmw_fence_single_bo(bo, NULL);
185 ttm_bo_unreserve(bo);
186 }
187
188 vmw_mob_destroy(otable->page_table);
189 otable->page_table = NULL;
190}
191
192/*
193 * vmw_otables_setup - Set up guest backed memory object tables
194 *
195 * @dev_priv: Pointer to a device private structure
196 *
197 * Takes care of the device guest backed surface
198 * initialization, by setting up the guest backed memory object tables.
199 * Returns 0 on success and various error codes on failure. A succesful return
200 * means the object tables can be taken down using the vmw_otables_takedown
201 * function.
202 */
203int vmw_otables_setup(struct vmw_private *dev_priv)
204{
205 unsigned long offset;
206 unsigned long bo_size;
207 struct vmw_otable *otables;
208 SVGAOTableType i;
209 int ret;
210
211 otables = kzalloc(SVGA_OTABLE_COUNT * sizeof(*otables),
212 GFP_KERNEL);
213 if (unlikely(otables == NULL)) {
214 DRM_ERROR("Failed to allocate space for otable "
215 "metadata.\n");
216 return -ENOMEM;
217 }
218
219 otables[SVGA_OTABLE_MOB].size =
220 VMWGFX_NUM_MOB * SVGA3D_OTABLE_MOB_ENTRY_SIZE;
221 otables[SVGA_OTABLE_SURFACE].size =
222 VMWGFX_NUM_GB_SURFACE * SVGA3D_OTABLE_SURFACE_ENTRY_SIZE;
223 otables[SVGA_OTABLE_CONTEXT].size =
224 VMWGFX_NUM_GB_CONTEXT * SVGA3D_OTABLE_CONTEXT_ENTRY_SIZE;
225 otables[SVGA_OTABLE_SHADER].size =
226 VMWGFX_NUM_GB_SHADER * SVGA3D_OTABLE_SHADER_ENTRY_SIZE;
227
228 bo_size = 0;
229 for (i = 0; i < SVGA_OTABLE_COUNT; ++i) {
230 otables[i].size =
231 (otables[i].size + PAGE_SIZE - 1) & PAGE_MASK;
232 bo_size += otables[i].size;
233 }
234
235 ret = ttm_bo_create(&dev_priv->bdev, bo_size,
236 ttm_bo_type_device,
237 &vmw_sys_ne_placement,
238 0, false, NULL,
239 &dev_priv->otable_bo);
240
241 if (unlikely(ret != 0))
242 goto out_no_bo;
243
244 ret = ttm_bo_reserve(dev_priv->otable_bo, false, true, false, false);
245 BUG_ON(ret != 0);
246 ret = vmw_bo_driver.ttm_tt_populate(dev_priv->otable_bo->ttm);
247 ttm_bo_unreserve(dev_priv->otable_bo);
248 if (unlikely(ret != 0))
249 goto out_no_setup;
250
251 offset = 0;
252 for (i = 0; i < SVGA_OTABLE_COUNT; ++i) {
253 ret = vmw_setup_otable_base(dev_priv, i, offset,
254 &otables[i]);
255 if (unlikely(ret != 0))
256 goto out_no_setup;
257 offset += otables[i].size;
258 }
259
260 dev_priv->otables = otables;
261 return 0;
262
263out_no_setup:
264 for (i = 0; i < SVGA_OTABLE_COUNT; ++i)
265 vmw_takedown_otable_base(dev_priv, i, &otables[i]);
266
267 ttm_bo_unref(&dev_priv->otable_bo);
268out_no_bo:
269 kfree(otables);
270 return ret;
271}
272
273
274/*
275 * vmw_otables_takedown - Take down guest backed memory object tables
276 *
277 * @dev_priv: Pointer to a device private structure
278 *
279 * Take down the Guest Memory Object tables.
280 */
281void vmw_otables_takedown(struct vmw_private *dev_priv)
282{
283 SVGAOTableType i;
284 struct ttm_buffer_object *bo = dev_priv->otable_bo;
285 int ret;
286
287 for (i = 0; i < SVGA_OTABLE_COUNT; ++i)
288 vmw_takedown_otable_base(dev_priv, i,
289 &dev_priv->otables[i]);
290
291 ret = ttm_bo_reserve(bo, false, true, false, false);
292 BUG_ON(ret != 0);
293
294 vmw_fence_single_bo(bo, NULL);
295 ttm_bo_unreserve(bo);
296
297 ttm_bo_unref(&dev_priv->otable_bo);
298 kfree(dev_priv->otables);
299 dev_priv->otables = NULL;
300}
301
302
303/*
304 * vmw_mob_calculate_pt_pages - Calculate the number of page table pages
305 * needed for a guest backed memory object.
306 *
307 * @data_pages: Number of data pages in the memory object buffer.
308 */
309static unsigned long vmw_mob_calculate_pt_pages(unsigned long data_pages)
310{
311 unsigned long data_size = data_pages * PAGE_SIZE;
312 unsigned long tot_size = 0;
313
314 while (likely(data_size > PAGE_SIZE)) {
315 data_size = DIV_ROUND_UP(data_size, PAGE_SIZE);
316 data_size *= VMW_PPN_SIZE;
317 tot_size += (data_size + PAGE_SIZE - 1) & PAGE_MASK;
318 }
319
320 return tot_size >> PAGE_SHIFT;
321}
322
323/*
324 * vmw_mob_create - Create a mob, but don't populate it.
325 *
326 * @data_pages: Number of data pages of the underlying buffer object.
327 */
328struct vmw_mob *vmw_mob_create(unsigned long data_pages)
329{
330 struct vmw_mob *mob = kzalloc(sizeof(*mob), GFP_KERNEL);
331
332 if (unlikely(mob == NULL))
333 return NULL;
334
335 mob->num_pages = vmw_mob_calculate_pt_pages(data_pages);
336
337 return mob;
338}
339
340/*
341 * vmw_mob_pt_populate - Populate the mob pagetable
342 *
343 * @mob: Pointer to the mob the pagetable of which we want to
344 * populate.
345 *
346 * This function allocates memory to be used for the pagetable, and
347 * adjusts TTM memory accounting accordingly. Returns ENOMEM if
348 * memory resources aren't sufficient and may cause TTM buffer objects
349 * to be swapped out by using the TTM memory accounting function.
350 */
351static int vmw_mob_pt_populate(struct vmw_private *dev_priv,
352 struct vmw_mob *mob)
353{
354 int ret;
355 BUG_ON(mob->pt_bo != NULL);
356
357 ret = ttm_bo_create(&dev_priv->bdev, mob->num_pages * PAGE_SIZE,
358 ttm_bo_type_device,
359 &vmw_sys_ne_placement,
360 0, false, NULL, &mob->pt_bo);
361 if (unlikely(ret != 0))
362 return ret;
363
364 ret = ttm_bo_reserve(mob->pt_bo, false, true, false, false);
365
366 BUG_ON(ret != 0);
367 ret = vmw_bo_driver.ttm_tt_populate(mob->pt_bo->ttm);
368 ttm_bo_unreserve(mob->pt_bo);
369 if (unlikely(ret != 0))
370 ttm_bo_unref(&mob->pt_bo);
371
372 return ret;
373}
374
375
376/*
377 * vmw_mob_build_pt - Build a pagetable
378 *
379 * @data_pages: Array of page pointers to the underlying buffer
380 * object's data pages.
381 * @num_data_pages: Number of buffer object data pages.
382 * @pt_pages: Array of page pointers to the page table pages.
383 *
384 * Returns the number of page table pages actually used.
385 * Uses atomic kmaps of highmem pages to avoid TLB thrashing.
386 */
387static unsigned long vmw_mob_build_pt(struct page **data_pages,
388 unsigned long num_data_pages,
389 struct page **pt_pages)
390{
391 unsigned long pt_size = num_data_pages * VMW_PPN_SIZE;
392 unsigned long num_pt_pages = DIV_ROUND_UP(pt_size, PAGE_SIZE);
393 unsigned long pt_page, data_page;
394 uint32_t *addr, *save_addr;
395 unsigned long i;
396
397 data_page = 0;
398 for (pt_page = 0; pt_page < num_pt_pages; ++pt_page) {
399 save_addr = addr = kmap_atomic(pt_pages[pt_page]);
400
401 for (i = 0; i < PAGE_SIZE / VMW_PPN_SIZE; ++i) {
402 *addr++ = page_to_pfn(data_pages[data_page++]);
403 if (unlikely(data_page >= num_data_pages))
404 break;
405 }
406 kunmap_atomic(save_addr);
407 }
408
409 return num_pt_pages;
410}
411
412/*
413 * vmw_mob_build_pt - Set up a multilevel mob pagetable
414 *
415 * @mob: Pointer to a mob whose page table needs setting up.
416 * @data_pages Array of page pointers to the buffer object's data
417 * pages.
418 * @num_data_pages: Number of buffer object data pages.
419 *
420 * Uses tail recursion to set up a multilevel mob page table.
421 */
422static void vmw_mob_pt_setup(struct vmw_mob *mob,
423 struct page **data_pages,
424 unsigned long num_data_pages)
425{
426 struct page **pt_pages;
427 unsigned long num_pt_pages = 0;
428 struct ttm_buffer_object *bo = mob->pt_bo;
429 int ret;
430
431 ret = ttm_bo_reserve(bo, false, true, false, 0);
432 BUG_ON(ret != 0);
433
434 pt_pages = bo->ttm->pages;
435 mob->pt_level = 0;
436 while (likely(num_data_pages > 1)) {
437 ++mob->pt_level;
438 BUG_ON(mob->pt_level > 2);
439
440 pt_pages += num_pt_pages;
441 num_pt_pages = vmw_mob_build_pt(data_pages, num_data_pages,
442 pt_pages);
443 data_pages = pt_pages;
444 num_data_pages = num_pt_pages;
445 }
446
447 mob->pt_root_page = *pt_pages;
448 ttm_bo_unreserve(bo);
449}
450
451/*
452 * vmw_mob_destroy - Destroy a mob, unpopulating first if necessary.
453 *
454 * @mob: Pointer to a mob to destroy.
455 */
456void vmw_mob_destroy(struct vmw_mob *mob)
457{
458 if (mob->pt_bo)
459 ttm_bo_unref(&mob->pt_bo);
460 kfree(mob);
461}
462
463/*
464 * vmw_mob_unbind - Hide a mob from the device.
465 *
466 * @dev_priv: Pointer to a device private.
467 * @mob_id: Device id of the mob to unbind.
468 */
469void vmw_mob_unbind(struct vmw_private *dev_priv,
470 struct vmw_mob *mob)
471{
472 struct {
473 SVGA3dCmdHeader header;
474 SVGA3dCmdDestroyGBMob body;
475 } *cmd;
476 int ret;
477 struct ttm_buffer_object *bo = mob->pt_bo;
478
479 if (bo) {
480 ret = ttm_bo_reserve(bo, false, true, false, 0);
481 /*
482 * Noone else should be using this buffer.
483 */
484 BUG_ON(ret != 0);
485 }
486
487 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
488 if (unlikely(cmd == NULL)) {
489 DRM_ERROR("Failed reserving FIFO space for Memory "
490 "Object unbinding.\n");
491 }
492 cmd->header.id = SVGA_3D_CMD_DESTROY_GB_MOB;
493 cmd->header.size = sizeof(cmd->body);
494 cmd->body.mobid = mob->id;
495 vmw_fifo_commit(dev_priv, sizeof(*cmd));
496 if (bo) {
497 vmw_fence_single_bo(bo, NULL);
498 ttm_bo_unreserve(bo);
499 }
500 vmw_3d_resource_dec(dev_priv, false);
501}
502
503/*
504 * vmw_mob_bind - Make a mob visible to the device after first
505 * populating it if necessary.
506 *
507 * @dev_priv: Pointer to a device private.
508 * @mob: Pointer to the mob we're making visible.
509 * @data_pages: Array of pointers to the data pages of the underlying
510 * buffer object.
511 * @num_data_pages: Number of data pages of the underlying buffer
512 * object.
513 * @mob_id: Device id of the mob to bind
514 *
515 * This function is intended to be interfaced with the ttm_tt backend
516 * code.
517 */
518int vmw_mob_bind(struct vmw_private *dev_priv,
519 struct vmw_mob *mob,
520 struct page **data_pages,
521 unsigned long num_data_pages,
522 int32_t mob_id)
523{
524 int ret;
525 bool pt_set_up = false;
526 struct {
527 SVGA3dCmdHeader header;
528 SVGA3dCmdDefineGBMob body;
529 } *cmd;
530
531 mob->id = mob_id;
532 if (likely(num_data_pages == 1)) {
533 mob->pt_level = 0;
534 mob->pt_root_page = *data_pages;
535 } else if (unlikely(mob->pt_bo == NULL)) {
536 ret = vmw_mob_pt_populate(dev_priv, mob);
537 if (unlikely(ret != 0))
538 return ret;
539
540 vmw_mob_pt_setup(mob, data_pages, num_data_pages);
541 pt_set_up = true;
542 }
543
544 (void) vmw_3d_resource_inc(dev_priv, false);
545
546 cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
547 if (unlikely(cmd == NULL)) {
548 DRM_ERROR("Failed reserving FIFO space for Memory "
549 "Object binding.\n");
550 goto out_no_cmd_space;
551 }
552
553 cmd->header.id = SVGA_3D_CMD_DEFINE_GB_MOB;
554 cmd->header.size = sizeof(cmd->body);
555 cmd->body.mobid = mob_id;
556 cmd->body.ptDepth = mob->pt_level;
557 cmd->body.base = page_to_pfn(mob->pt_root_page);
558 cmd->body.sizeInBytes = num_data_pages * PAGE_SIZE;
559
560 vmw_fifo_commit(dev_priv, sizeof(*cmd));
561
562 return 0;
563
564out_no_cmd_space:
565 vmw_3d_resource_dec(dev_priv, false);
566 if (pt_set_up)
567 ttm_bo_unref(&mob->pt_bo);
568
569 return -ENOMEM;
570}
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-24 02:03:50 -0400