1/*
2 * Copyright (C) 2009-2010 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26
27#include <stdbool.h>
28#include "nouveau_driver.h"
29#include "nouveau_context.h"
30#include "nouveau_bufferobj.h"
31#include "nouveau_fbo.h"
32#include "nv_object.xml.h"
33
34#include "main/dd.h"
35#include "main/framebuffer.h"
36#include "main/fbobject.h"
37#include "main/light.h"
38#include "main/state.h"
39#include "main/version.h"
40#include "drivers/common/meta.h"
41#include "drivers/common/driverfuncs.h"
42#include "swrast/swrast.h"
43#include "swrast/s_context.h"
44#include "vbo/vbo.h"
45#include "tnl/tnl.h"
46#include "tnl/t_context.h"
47
48GLboolean
49nouveau_context_create(gl_api api,
50		       const struct gl_config *visual, __DRIcontext *dri_ctx,
51		       unsigned major_version,
52		       unsigned minor_version,
53		       uint32_t flags,
54		       unsigned *error,
55		       void *share_ctx)
56{
57	__DRIscreen *dri_screen = dri_ctx->driScreenPriv;
58	struct nouveau_screen *screen = dri_screen->driverPrivate;
59	struct nouveau_context *nctx;
60	struct gl_context *ctx;
61
62	switch (api) {
63	case API_OPENGL:
64		/* Do after-the-fact version checking (below).
65		 */
66		break;
67	case API_OPENGLES:
68		/* NV10 and NV20 can support OpenGL ES 1.0 only.  Older chips
69		 * cannot do even that.
70		 */
71		if ((screen->device->chipset & 0xf0) == 0x00) {
72			*error = __DRI_CTX_ERROR_BAD_API;
73			return GL_FALSE;
74		} else if (minor_version != 0) {
75			*error = __DRI_CTX_ERROR_BAD_VERSION;
76			return GL_FALSE;
77		}
78		break;
79	case API_OPENGLES2:
80	case API_OPENGL_CORE:
81		*error = __DRI_CTX_ERROR_BAD_API;
82		return GL_FALSE;
83	}
84
85	/* API and flag filtering is handled in dri2CreateContextAttribs.
86	 */
87	(void) flags;
88
89	ctx = screen->driver->context_create(screen, visual, share_ctx);
90	if (!ctx) {
91		*error = __DRI_CTX_ERROR_NO_MEMORY;
92		return GL_FALSE;
93	}
94
95	nctx = to_nouveau_context(ctx);
96	nctx->dri_context = dri_ctx;
97	dri_ctx->driverPrivate = ctx;
98
99	_mesa_compute_version(ctx);
100	if (ctx->Version < major_version * 10 + minor_version) {
101	   nouveau_context_destroy(dri_ctx);
102	   *error = __DRI_CTX_ERROR_BAD_VERSION;
103	   return GL_FALSE;
104	}
105
106	if (nouveau_bo_new(context_dev(ctx), NOUVEAU_BO_VRAM, 0, 4096,
107			   NULL, &nctx->fence)) {
108		nouveau_context_destroy(dri_ctx);
109		*error = __DRI_CTX_ERROR_NO_MEMORY;
110		return GL_FALSE;
111	}
112
113	*error = __DRI_CTX_ERROR_SUCCESS;
114	return GL_TRUE;
115}
116
117GLboolean
118nouveau_context_init(struct gl_context *ctx, struct nouveau_screen *screen,
119		     const struct gl_config *visual, struct gl_context *share_ctx)
120{
121	struct nouveau_context *nctx = to_nouveau_context(ctx);
122	struct dd_function_table functions;
123	int ret;
124
125	nctx->screen = screen;
126	nctx->fallback = HWTNL;
127
128	/* Initialize the function pointers. */
129	_mesa_init_driver_functions(&functions);
130	nouveau_driver_functions_init(&functions);
131	nouveau_bufferobj_functions_init(&functions);
132	nouveau_texture_functions_init(&functions);
133	nouveau_fbo_functions_init(&functions);
134
135	/* Initialize the mesa context. */
136	_mesa_initialize_context(ctx, API_OPENGL, visual,
137                                 share_ctx, &functions, NULL);
138
139	nouveau_state_init(ctx);
140	nouveau_scratch_init(ctx);
141	_mesa_meta_init(ctx);
142	_swrast_CreateContext(ctx);
143	_vbo_CreateContext(ctx);
144	_tnl_CreateContext(ctx);
145	nouveau_span_functions_init(ctx);
146	_mesa_allow_light_in_model(ctx, GL_FALSE);
147
148	/* Allocate a hardware channel. */
149	ret = nouveau_object_new(&context_dev(ctx)->object, 0xbeef0000,
150				 NOUVEAU_FIFO_CHANNEL_CLASS,
151				 &(struct nv04_fifo){
152					.vram = 0xbeef0201,
153					.gart = 0xbeef0202
154				 }, sizeof(struct nv04_fifo), &nctx->hw.chan);
155	if (ret) {
156		nouveau_error("Error initializing the FIFO.\n");
157		return GL_FALSE;
158	}
159
160	/* Allocate a client (thread data) */
161	ret = nouveau_client_new(context_dev(ctx), &nctx->hw.client);
162	if (ret) {
163		nouveau_error("Error creating thread data\n");
164		return GL_FALSE;
165	}
166
167	/* Allocate a push buffer */
168	ret = nouveau_pushbuf_new(nctx->hw.client, nctx->hw.chan, 4,
169				  512 * 1024, true, &nctx->hw.pushbuf);
170	if (ret) {
171		nouveau_error("Error allocating DMA push buffer\n");
172		return GL_FALSE;
173	}
174
175	/* Allocate buffer context */
176	ret = nouveau_bufctx_new(nctx->hw.client, 16, &nctx->hw.bufctx);
177	if (ret) {
178		nouveau_error("Error allocating buffer context\n");
179		return GL_FALSE;
180	}
181
182	nctx->hw.pushbuf->user_priv = nctx->hw.bufctx;
183
184	/* Allocate NULL object */
185	ret = nouveau_object_new(nctx->hw.chan, 0x00000000, NV01_NULL_CLASS,
186				 NULL, 0, &nctx->hw.null);
187	if (ret) {
188		nouveau_error("Error allocating NULL object\n");
189		return GL_FALSE;
190	}
191
192	/* Enable any supported extensions. */
193	ctx->Extensions.EXT_blend_color = true;
194	ctx->Extensions.EXT_blend_minmax = true;
195	ctx->Extensions.EXT_fog_coord = true;
196	ctx->Extensions.EXT_framebuffer_blit = true;
197	ctx->Extensions.EXT_framebuffer_object = true;
198	ctx->Extensions.EXT_packed_depth_stencil = true;
199	ctx->Extensions.EXT_secondary_color = true;
200	ctx->Extensions.EXT_texture_filter_anisotropic = true;
201	ctx->Extensions.NV_blend_square = true;
202	ctx->Extensions.NV_texture_env_combine4 = true;
203
204	return GL_TRUE;
205}
206
207void
208nouveau_context_deinit(struct gl_context *ctx)
209{
210	struct nouveau_context *nctx = to_nouveau_context(ctx);
211
212	if (TNL_CONTEXT(ctx))
213		_tnl_DestroyContext(ctx);
214
215	if (vbo_context(ctx))
216		_vbo_DestroyContext(ctx);
217
218	if (SWRAST_CONTEXT(ctx))
219		_swrast_DestroyContext(ctx);
220
221	if (ctx->Meta)
222		_mesa_meta_free(ctx);
223
224	nouveau_bufctx_del(&nctx->hw.bufctx);
225	nouveau_pushbuf_del(&nctx->hw.pushbuf);
226	nouveau_client_del(&nctx->hw.client);
227	nouveau_object_del(&nctx->hw.chan);
228
229	nouveau_scratch_destroy(ctx);
230	_mesa_free_context_data(ctx);
231}
232
233void
234nouveau_context_destroy(__DRIcontext *dri_ctx)
235{
236	struct nouveau_context *nctx = dri_ctx->driverPrivate;
237	struct gl_context *ctx = &nctx->base;
238
239	nouveau_bo_ref(NULL, &nctx->fence);
240	context_drv(ctx)->context_destroy(ctx);
241}
242
243void
244nouveau_update_renderbuffers(__DRIcontext *dri_ctx, __DRIdrawable *draw)
245{
246	struct gl_context *ctx = dri_ctx->driverPrivate;
247	struct nouveau_context *nctx = to_nouveau_context(ctx);
248	__DRIscreen *screen = dri_ctx->driScreenPriv;
249	struct gl_framebuffer *fb = draw->driverPrivate;
250	struct nouveau_framebuffer *nfb = to_nouveau_framebuffer(fb);
251	unsigned int attachments[10];
252	__DRIbuffer *buffers = NULL;
253	int i = 0, count, ret;
254
255	if (draw->lastStamp == draw->dri2.stamp)
256		return;
257	draw->lastStamp = draw->dri2.stamp;
258
259	if (nfb->need_front)
260		attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
261	if (fb->Visual.doubleBufferMode)
262		attachments[i++] = __DRI_BUFFER_BACK_LEFT;
263	if (fb->Visual.haveDepthBuffer && fb->Visual.haveStencilBuffer)
264		attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
265	else if (fb->Visual.haveDepthBuffer)
266		attachments[i++] = __DRI_BUFFER_DEPTH;
267	else if (fb->Visual.haveStencilBuffer)
268		attachments[i++] = __DRI_BUFFER_STENCIL;
269
270	buffers = (*screen->dri2.loader->getBuffers)(draw, &draw->w, &draw->h,
271						     attachments, i, &count,
272						     draw->loaderPrivate);
273	if (buffers == NULL)
274		return;
275
276	for (i = 0; i < count; i++) {
277		struct gl_renderbuffer *rb;
278		struct nouveau_surface *s;
279		uint32_t old_name;
280		int index;
281
282		switch (buffers[i].attachment) {
283		case __DRI_BUFFER_FRONT_LEFT:
284		case __DRI_BUFFER_FAKE_FRONT_LEFT:
285			index = BUFFER_FRONT_LEFT;
286			break;
287		case __DRI_BUFFER_BACK_LEFT:
288			index = BUFFER_BACK_LEFT;
289			break;
290		case __DRI_BUFFER_DEPTH:
291		case __DRI_BUFFER_DEPTH_STENCIL:
292			index = BUFFER_DEPTH;
293			break;
294		case __DRI_BUFFER_STENCIL:
295			index = BUFFER_STENCIL;
296			break;
297		default:
298			assert(0);
299		}
300
301		rb = fb->Attachment[index].Renderbuffer;
302		s = &to_nouveau_renderbuffer(rb)->surface;
303
304		s->width = draw->w;
305		s->height = draw->h;
306		s->pitch = buffers[i].pitch;
307		s->cpp = buffers[i].cpp;
308
309		if (index == BUFFER_DEPTH && s->bo) {
310			ret = nouveau_bo_name_get(s->bo, &old_name);
311			/*
312			 * Disable fast Z clears in the next frame, the
313			 * depth buffer contents are undefined.
314			 */
315			if (!ret && old_name != buffers[i].name)
316				nctx->hierz.clear_seq = 0;
317		}
318
319		nouveau_bo_ref(NULL, &s->bo);
320		ret = nouveau_bo_name_ref(context_dev(ctx),
321					  buffers[i].name, &s->bo);
322		assert(!ret);
323	}
324
325	_mesa_resize_framebuffer(ctx, fb, draw->w, draw->h);
326}
327
328static void
329update_framebuffer(__DRIcontext *dri_ctx, __DRIdrawable *draw,
330		   int *stamp)
331{
332	struct gl_context *ctx = dri_ctx->driverPrivate;
333	struct gl_framebuffer *fb = draw->driverPrivate;
334
335	*stamp = draw->dri2.stamp;
336
337	nouveau_update_renderbuffers(dri_ctx, draw);
338	_mesa_resize_framebuffer(ctx, fb, draw->w, draw->h);
339
340	/* Clean up references to the old framebuffer objects. */
341	context_dirty(ctx, FRAMEBUFFER);
342	nouveau_bufctx_reset(to_nouveau_context(ctx)->hw.bufctx, BUFCTX_FB);
343	PUSH_KICK(context_push(ctx));
344}
345
346GLboolean
347nouveau_context_make_current(__DRIcontext *dri_ctx, __DRIdrawable *dri_draw,
348			     __DRIdrawable *dri_read)
349{
350	if (dri_ctx) {
351		struct nouveau_context *nctx = dri_ctx->driverPrivate;
352		struct gl_context *ctx = &nctx->base;
353
354		/* Ask the X server for new renderbuffers. */
355		if (dri_draw->driverPrivate != ctx->WinSysDrawBuffer)
356			update_framebuffer(dri_ctx, dri_draw,
357					   &dri_ctx->dri2.draw_stamp);
358
359		if (dri_draw != dri_read &&
360		    dri_read->driverPrivate != ctx->WinSysReadBuffer)
361			update_framebuffer(dri_ctx, dri_read,
362					   &dri_ctx->dri2.read_stamp);
363
364		/* Pass it down to mesa. */
365		_mesa_make_current(ctx, dri_draw->driverPrivate,
366				   dri_read->driverPrivate);
367		_mesa_update_state(ctx);
368
369	} else {
370		_mesa_make_current(NULL, NULL, NULL);
371	}
372
373	return GL_TRUE;
374}
375
376GLboolean
377nouveau_context_unbind(__DRIcontext *dri_ctx)
378{
379	/* Unset current context and dispatch table */
380	_mesa_make_current(NULL, NULL, NULL);
381
382	return GL_TRUE;
383}
384
385void
386nouveau_fallback(struct gl_context *ctx, enum nouveau_fallback mode)
387{
388	struct nouveau_context *nctx = to_nouveau_context(ctx);
389
390	nctx->fallback = MAX2(HWTNL, mode);
391
392	if (mode < SWRAST) {
393		nouveau_state_emit(ctx);
394#if 0
395		nouveau_bo_state_emit(ctx);
396#endif
397	} else {
398		PUSH_KICK(context_push(ctx));
399	}
400}
401
402static void
403validate_framebuffer(__DRIcontext *dri_ctx, __DRIdrawable *draw,
404		     int *stamp)
405{
406	struct gl_framebuffer *fb = draw->driverPrivate;
407	struct nouveau_framebuffer *nfb = to_nouveau_framebuffer(fb);
408	GLboolean need_front =
409		(fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT ||
410		 fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT);
411
412	if (nfb->need_front != need_front) {
413		nfb->need_front = need_front;
414		dri2InvalidateDrawable(draw);
415	}
416
417	if (draw->dri2.stamp != *stamp)
418		update_framebuffer(dri_ctx, draw, stamp);
419}
420
421void
422nouveau_validate_framebuffer(struct gl_context *ctx)
423{
424	__DRIcontext *dri_ctx = to_nouveau_context(ctx)->dri_context;
425	__DRIdrawable *dri_draw = dri_ctx->driDrawablePriv;
426	__DRIdrawable *dri_read = dri_ctx->driReadablePriv;
427
428	if (_mesa_is_winsys_fbo(ctx->DrawBuffer))
429		validate_framebuffer(dri_ctx, dri_draw,
430				     &dri_ctx->dri2.draw_stamp);
431
432	if (_mesa_is_winsys_fbo(ctx->ReadBuffer))
433		validate_framebuffer(dri_ctx, dri_read,
434				     &dri_ctx->dri2.read_stamp);
435
436	if (ctx->NewState & _NEW_BUFFERS)
437		_mesa_update_state(ctx);
438}
439