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 <stdio.h>
29#include "nouveau_driver.h"
30#include "nouveau_context.h"
31#include "nouveau_bufferobj.h"
32#include "nouveau_fbo.h"
33#include "nv_object.xml.h"
34
35#include "main/api_exec.h"
36#include "main/dd.h"
37#include "main/framebuffer.h"
38#include "main/fbobject.h"
39#include "main/light.h"
40#include "main/state.h"
41#include "main/version.h"
42#include "main/vtxfmt.h"
43#include "drivers/common/meta.h"
44#include "drivers/common/driverfuncs.h"
45#include "swrast/swrast.h"
46#include "swrast/s_context.h"
47#include "vbo/vbo.h"
48#include "tnl/tnl.h"
49#include "tnl/t_context.h"
50
51GLboolean
52nouveau_context_create(gl_api api,
53		       const struct gl_config *visual, __DRIcontext *dri_ctx,
54		       const struct __DriverContextConfig *ctx_config,
55		       unsigned *error,
56		       void *share_ctx)
57{
58	__DRIscreen *dri_screen = dri_ctx->driScreenPriv;
59	struct nouveau_screen *screen = dri_screen->driverPrivate;
60	struct nouveau_context *nctx;
61	struct gl_context *ctx;
62
63	if (ctx_config->flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_NO_ERROR)) {
64		*error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
65		return false;
66	}
67
68	if (ctx_config->attribute_mask) {
69		*error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
70		return false;
71	}
72
73	ctx = screen->driver->context_create(screen, api, visual, share_ctx);
74	if (!ctx) {
75		*error = __DRI_CTX_ERROR_NO_MEMORY;
76		return GL_FALSE;
77	}
78
79	driContextSetFlags(ctx, ctx_config->flags);
80
81	nctx = to_nouveau_context(ctx);
82	nctx->dri_context = dri_ctx;
83	dri_ctx->driverPrivate = ctx;
84
85	_mesa_compute_version(ctx);
86	if (ctx->Version < (ctx_config->major_version * 10 +
87			    ctx_config->minor_version)) {
88	   nouveau_context_destroy(dri_ctx);
89	   *error = __DRI_CTX_ERROR_BAD_VERSION;
90	   return GL_FALSE;
91	}
92
93	/* Exec table initialization requires the version to be computed */
94	_mesa_initialize_dispatch_tables(ctx);
95	_mesa_initialize_vbo_vtxfmt(ctx);
96
97	if (nouveau_bo_new(context_dev(ctx), NOUVEAU_BO_VRAM, 0, 4096,
98			   NULL, &nctx->fence)) {
99		nouveau_context_destroy(dri_ctx);
100		*error = __DRI_CTX_ERROR_NO_MEMORY;
101		return GL_FALSE;
102	}
103
104	*error = __DRI_CTX_ERROR_SUCCESS;
105	return GL_TRUE;
106}
107
108GLboolean
109nouveau_context_init(struct gl_context *ctx, gl_api api,
110		     struct nouveau_screen *screen,
111		     const struct gl_config *visual, struct gl_context *share_ctx)
112{
113	struct nouveau_context *nctx = to_nouveau_context(ctx);
114	struct dd_function_table functions;
115	int ret;
116
117	nctx->screen = screen;
118	nctx->fallback = HWTNL;
119
120	/* Initialize the function pointers. */
121	_mesa_init_driver_functions(&functions);
122	_tnl_init_driver_draw_function(&functions);
123	nouveau_driver_functions_init(&functions);
124	nouveau_bufferobj_functions_init(&functions);
125	nouveau_texture_functions_init(&functions);
126	nouveau_fbo_functions_init(&functions);
127
128	/* Initialize the mesa context. */
129	if (!_mesa_initialize_context(ctx, api, visual, share_ctx, &functions))
130		return GL_FALSE;
131
132	nouveau_state_init(ctx);
133	nouveau_scratch_init(ctx);
134	_mesa_meta_init(ctx);
135	_swrast_CreateContext(ctx);
136	_vbo_CreateContext(ctx);
137	_tnl_CreateContext(ctx);
138	nouveau_span_functions_init(ctx);
139	_mesa_allow_light_in_model(ctx, GL_FALSE);
140
141	/* Allocate a hardware channel. */
142	ret = nouveau_object_new(&context_dev(ctx)->object, 0xbeef0000,
143				 NOUVEAU_FIFO_CHANNEL_CLASS,
144				 &(struct nv04_fifo){
145					.vram = 0xbeef0201,
146					.gart = 0xbeef0202
147				 }, sizeof(struct nv04_fifo), &nctx->hw.chan);
148	if (ret) {
149		nouveau_error("Error initializing the FIFO.\n");
150		return GL_FALSE;
151	}
152
153	/* Allocate a client (thread data) */
154	ret = nouveau_client_new(context_dev(ctx), &nctx->hw.client);
155	if (ret) {
156		nouveau_error("Error creating thread data\n");
157		return GL_FALSE;
158	}
159
160	/* Allocate a push buffer */
161	ret = nouveau_pushbuf_new(nctx->hw.client, nctx->hw.chan, 4,
162				  512 * 1024, true, &nctx->hw.pushbuf);
163	if (ret) {
164		nouveau_error("Error allocating DMA push buffer\n");
165		return GL_FALSE;
166	}
167
168	/* Allocate buffer context */
169	ret = nouveau_bufctx_new(nctx->hw.client, 16, &nctx->hw.bufctx);
170	if (ret) {
171		nouveau_error("Error allocating buffer context\n");
172		return GL_FALSE;
173	}
174
175	nctx->hw.pushbuf->user_priv = nctx->hw.bufctx;
176
177	/* Allocate NULL object */
178	ret = nouveau_object_new(nctx->hw.chan, 0x00000000, NV01_NULL_CLASS,
179				 NULL, 0, &nctx->hw.null);
180	if (ret) {
181		nouveau_error("Error allocating NULL object\n");
182		return GL_FALSE;
183	}
184
185	/* Enable any supported extensions. */
186	ctx->Extensions.EXT_blend_color = true;
187	ctx->Extensions.EXT_blend_minmax = true;
188	ctx->Extensions.EXT_texture_filter_anisotropic = true;
189	ctx->Extensions.NV_texture_env_combine4 = true;
190	ctx->Const.MaxDrawBuffers = ctx->Const.MaxColorAttachments = 1;
191
192	/* This effectively disables 3D textures */
193	ctx->Const.Max3DTextureLevels = 1;
194
195	return GL_TRUE;
196}
197
198void
199nouveau_context_deinit(struct gl_context *ctx)
200{
201	struct nouveau_context *nctx = to_nouveau_context(ctx);
202
203	if (TNL_CONTEXT(ctx))
204		_tnl_DestroyContext(ctx);
205
206	_vbo_DestroyContext(ctx);
207
208	if (SWRAST_CONTEXT(ctx))
209		_swrast_DestroyContext(ctx);
210
211	if (ctx->Meta)
212		_mesa_meta_free(ctx);
213
214	nouveau_bufctx_del(&nctx->hw.bufctx);
215	nouveau_pushbuf_del(&nctx->hw.pushbuf);
216	nouveau_client_del(&nctx->hw.client);
217	nouveau_object_del(&nctx->hw.chan);
218
219	nouveau_scratch_destroy(ctx);
220	_mesa_free_context_data(ctx, true);
221}
222
223void
224nouveau_context_destroy(__DRIcontext *dri_ctx)
225{
226	struct nouveau_context *nctx = dri_ctx->driverPrivate;
227	struct gl_context *ctx = &nctx->base;
228
229	nouveau_bo_ref(NULL, &nctx->fence);
230	context_drv(ctx)->context_destroy(ctx);
231}
232
233void
234nouveau_update_renderbuffers(__DRIcontext *dri_ctx, __DRIdrawable *draw)
235{
236	struct gl_context *ctx = dri_ctx->driverPrivate;
237	struct nouveau_context *nctx = to_nouveau_context(ctx);
238	__DRIscreen *screen = dri_ctx->driScreenPriv;
239	struct gl_framebuffer *fb = draw->driverPrivate;
240	struct nouveau_framebuffer *nfb = to_nouveau_framebuffer(fb);
241	unsigned int attachments[10];
242	__DRIbuffer *buffers = NULL;
243	int i = 0, count, ret;
244
245	if (draw->lastStamp == draw->dri2.stamp)
246		return;
247	draw->lastStamp = draw->dri2.stamp;
248
249	if (nfb->need_front)
250		attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
251	if (fb->Visual.doubleBufferMode)
252		attachments[i++] = __DRI_BUFFER_BACK_LEFT;
253	if (fb->Visual.haveDepthBuffer && fb->Visual.haveStencilBuffer)
254		attachments[i++] = __DRI_BUFFER_DEPTH_STENCIL;
255	else if (fb->Visual.haveDepthBuffer)
256		attachments[i++] = __DRI_BUFFER_DEPTH;
257	else if (fb->Visual.haveStencilBuffer)
258		attachments[i++] = __DRI_BUFFER_STENCIL;
259
260	buffers = screen->dri2.loader->getBuffers(draw, &draw->w, &draw->h,
261						  attachments, i, &count,
262						  draw->loaderPrivate);
263	if (buffers == NULL)
264		return;
265
266	for (i = 0; i < count; i++) {
267		struct gl_renderbuffer *rb;
268		struct nouveau_surface *s;
269		uint32_t old_name;
270		int index;
271
272		switch (buffers[i].attachment) {
273		case __DRI_BUFFER_FRONT_LEFT:
274		case __DRI_BUFFER_FAKE_FRONT_LEFT:
275			index = BUFFER_FRONT_LEFT;
276			break;
277		case __DRI_BUFFER_BACK_LEFT:
278			index = BUFFER_BACK_LEFT;
279			break;
280		case __DRI_BUFFER_DEPTH:
281		case __DRI_BUFFER_DEPTH_STENCIL:
282			index = BUFFER_DEPTH;
283			break;
284		case __DRI_BUFFER_STENCIL:
285			index = BUFFER_STENCIL;
286			break;
287		default:
288			assert(0);
289		}
290
291		rb = fb->Attachment[index].Renderbuffer;
292		s = &to_nouveau_renderbuffer(rb)->surface;
293
294		s->width = draw->w;
295		s->height = draw->h;
296		s->pitch = buffers[i].pitch;
297		s->cpp = buffers[i].cpp;
298
299		if (index == BUFFER_DEPTH && s->bo) {
300			ret = nouveau_bo_name_get(s->bo, &old_name);
301			/*
302			 * Disable fast Z clears in the next frame, the
303			 * depth buffer contents are undefined.
304			 */
305			if (!ret && old_name != buffers[i].name)
306				nctx->hierz.clear_seq = 0;
307		}
308
309		nouveau_bo_ref(NULL, &s->bo);
310		ret = nouveau_bo_name_ref(context_dev(ctx),
311					  buffers[i].name, &s->bo);
312		assert(!ret);
313	}
314
315	_mesa_resize_framebuffer(ctx, fb, draw->w, draw->h);
316}
317
318static void
319update_framebuffer(__DRIcontext *dri_ctx, __DRIdrawable *draw,
320		   int *stamp)
321{
322	struct gl_context *ctx = dri_ctx->driverPrivate;
323	struct gl_framebuffer *fb = draw->driverPrivate;
324
325	*stamp = draw->dri2.stamp;
326
327	nouveau_update_renderbuffers(dri_ctx, draw);
328	_mesa_resize_framebuffer(ctx, fb, draw->w, draw->h);
329
330	/* Clean up references to the old framebuffer objects. */
331	context_dirty(ctx, FRAMEBUFFER);
332	nouveau_bufctx_reset(to_nouveau_context(ctx)->hw.bufctx, BUFCTX_FB);
333	PUSH_KICK(context_push(ctx));
334}
335
336GLboolean
337nouveau_context_make_current(__DRIcontext *dri_ctx, __DRIdrawable *dri_draw,
338			     __DRIdrawable *dri_read)
339{
340	if (dri_ctx) {
341		struct nouveau_context *nctx = dri_ctx->driverPrivate;
342		struct gl_context *ctx = &nctx->base;
343
344		/* Ask the X server for new renderbuffers. */
345		if (dri_draw->driverPrivate != ctx->WinSysDrawBuffer)
346			update_framebuffer(dri_ctx, dri_draw,
347					   &dri_ctx->dri2.draw_stamp);
348
349		if (dri_draw != dri_read &&
350		    dri_read->driverPrivate != ctx->WinSysReadBuffer)
351			update_framebuffer(dri_ctx, dri_read,
352					   &dri_ctx->dri2.read_stamp);
353
354		/* Pass it down to mesa. */
355		_mesa_make_current(ctx, dri_draw->driverPrivate,
356				   dri_read->driverPrivate);
357		_mesa_update_state(ctx);
358
359	} else {
360		_mesa_make_current(NULL, NULL, NULL);
361	}
362
363	return GL_TRUE;
364}
365
366GLboolean
367nouveau_context_unbind(__DRIcontext *dri_ctx)
368{
369	/* Unset current context and dispatch table */
370	_mesa_make_current(NULL, NULL, NULL);
371
372	return GL_TRUE;
373}
374
375void
376nouveau_fallback(struct gl_context *ctx, enum nouveau_fallback mode)
377{
378	struct nouveau_context *nctx = to_nouveau_context(ctx);
379
380	nctx->fallback = MAX2(HWTNL, mode);
381
382	if (mode < SWRAST) {
383		nouveau_state_emit(ctx);
384#if 0
385		nouveau_bo_state_emit(ctx);
386#endif
387	} else {
388		PUSH_KICK(context_push(ctx));
389	}
390}
391
392static void
393validate_framebuffer(__DRIcontext *dri_ctx, __DRIdrawable *draw,
394		     int *stamp)
395{
396	struct gl_framebuffer *fb = draw->driverPrivate;
397	struct nouveau_framebuffer *nfb = to_nouveau_framebuffer(fb);
398	GLboolean need_front =
399		(fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT ||
400		 fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT);
401
402	if (nfb->need_front != need_front) {
403		nfb->need_front = need_front;
404		dri2InvalidateDrawable(draw);
405	}
406
407	if (draw->dri2.stamp != *stamp)
408		update_framebuffer(dri_ctx, draw, stamp);
409}
410
411void
412nouveau_validate_framebuffer(struct gl_context *ctx)
413{
414	__DRIcontext *dri_ctx = to_nouveau_context(ctx)->dri_context;
415	__DRIdrawable *dri_draw = dri_ctx->driDrawablePriv;
416	__DRIdrawable *dri_read = dri_ctx->driReadablePriv;
417
418	if (_mesa_is_winsys_fbo(ctx->DrawBuffer))
419		validate_framebuffer(dri_ctx, dri_draw,
420				     &dri_ctx->dri2.draw_stamp);
421
422	if (_mesa_is_winsys_fbo(ctx->ReadBuffer))
423		validate_framebuffer(dri_ctx, dri_read,
424				     &dri_ctx->dri2.read_stamp);
425
426	if (ctx->NewState & _NEW_BUFFERS)
427		_mesa_update_state(ctx);
428}
429