#include "nouveau_object.h"
#include "nouveau_msg.h"
+#define NOUVEAU_MEM_FREE(mem) do { \
+ nouveau_mem_free(ctx, (mem)); \
+ (mem) = NULL; \
+} while(0)
+
#define DEBUG(fmt,args...) do { \
if (NOUVEAU_DEBUG & DEBUG_BUFFEROBJ) { \
fprintf(stderr, "%s: "fmt, __func__, ##args); \
} \
} while(0)
-/* Wrapper for nouveau_mem_gpu_offset_get() that marks the bufferobj dirty
- * if the GPU modifies the data.
- */
+static GLboolean
+nouveau_bo_download_from_screen(GLcontext *ctx, GLuint offset, GLuint size,
+ struct gl_buffer_object *bo)
+{
+ nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_mem *in_mem;
+
+ DEBUG("bo=%p, offset=%d, size=%d\n", bo, offset, size);
+
+ /* If there's a permanent backing store, blit directly into it */
+ if (nbo->cpu_mem) {
+ if (nbo->cpu_mem != nbo->gpu_mem) {
+ DEBUG("..cpu_mem\n");
+ nouveau_memformat_flat_emit(ctx, nbo->cpu_mem,
+ nbo->gpu_mem,
+ offset, offset, size);
+ }
+ } else {
+ DEBUG("..sys_mem\n");
+ in_mem = nouveau_mem_alloc(ctx, NOUVEAU_MEM_AGP, size, 0);
+ if (in_mem) {
+ DEBUG("....via AGP\n");
+ /* otherwise, try blitting to faster memory and
+ * copying from there
+ */
+ nouveau_memformat_flat_emit(ctx, in_mem, nbo->gpu_mem,
+ 0, offset, size);
+ nouveau_notifier_wait_nop(ctx, nmesa->syncNotifier,
+ NvSubMemFormat);
+ _mesa_memcpy(nbo->cpu_mem_sys + offset,
+ in_mem->map, size);
+ NOUVEAU_MEM_FREE(in_mem);
+ } else {
+ DEBUG("....direct VRAM copy\n");
+ /* worst case, copy directly from vram */
+ _mesa_memcpy(nbo->cpu_mem_sys + offset,
+ nbo->gpu_mem + offset,
+ size);
+ }
+ }
+
+ return GL_TRUE;
+}
+
+static GLboolean
+nouveau_bo_upload_to_screen(GLcontext *ctx, GLuint offset, GLuint size,
+ struct gl_buffer_object *bo)
+{
+ nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_mem *out_mem;
+
+ DEBUG("bo=%p, offset=%d, size=%d\n", bo, offset, size);
+
+ if (nbo->cpu_mem) {
+ if (nbo->cpu_mem != nbo->gpu_mem) {
+ DEBUG("..cpu_mem\n");
+ nouveau_memformat_flat_emit(ctx, nbo->gpu_mem,
+ nbo->cpu_mem,
+ offset, offset, size);
+ }
+ } else {
+ out_mem = nouveau_mem_alloc(ctx, NOUVEAU_MEM_AGP |
+ NOUVEAU_MEM_MAPPED,
+ size, 0);
+ if (out_mem) {
+ DEBUG("....via AGP\n");
+ _mesa_memcpy(out_mem->map,
+ nbo->cpu_mem_sys + offset, size);
+ nouveau_memformat_flat_emit(ctx, nbo->gpu_mem, out_mem,
+ offset, 0, size);
+ nouveau_notifier_wait_nop(ctx, nmesa->syncNotifier,
+ NvSubMemFormat);
+ NOUVEAU_MEM_FREE(out_mem);
+ } else {
+ DEBUG("....direct VRAM copy\n");
+ _mesa_memcpy(nbo->gpu_mem->map + offset,
+ nbo->cpu_mem_sys + offset,
+ size);
+ }
+ }
+
+ return GL_TRUE;
+}
+
+GLboolean
+nouveau_bo_move_in(GLcontext *ctx, struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+
+ DEBUG("bo=%p\n", bo);
+
+ if (bo->OnCard)
+ return GL_TRUE;
+ assert(nbo->gpu_mem_flags);
+
+ nbo->gpu_mem = nouveau_mem_alloc(ctx, nbo->gpu_mem_flags |
+ NOUVEAU_MEM_MAPPED,
+ bo->Size, 0);
+ assert(nbo->gpu_mem);
+
+ if (nbo->cpu_mem_flags) {
+ if ((nbo->cpu_mem_flags|NOUVEAU_MEM_MAPPED) != nbo->gpu_mem->type) {
+ DEBUG("..need cpu_mem buffer\n");
+
+ nbo->cpu_mem = nouveau_mem_alloc(ctx,
+ nbo->cpu_mem_flags |
+ NOUVEAU_MEM_MAPPED,
+ bo->Size, 0);
+
+ if (nbo->cpu_mem) {
+ DEBUG("....alloc ok, kill sys_mem buffer\n");
+ _mesa_memcpy(nbo->cpu_mem->map,
+ nbo->cpu_mem_sys, bo->Size);
+ FREE(nbo->cpu_mem_sys);
+ }
+ } else {
+ DEBUG("..cpu direct access to GPU buffer\n");
+ nbo->cpu_mem = nbo->gpu_mem;
+ }
+ }
+ nouveau_bo_upload_to_screen(ctx, 0, bo->Size, bo);
+
+ bo->OnCard = GL_TRUE;
+ return GL_TRUE;
+}
+
+GLboolean
+nouveau_bo_move_out(GLcontext *ctx, struct gl_buffer_object *bo)
+{
+ nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ GLuint nr_dirty;
+
+ DEBUG("bo=%p\n", bo);
+ if (!bo->OnCard)
+ return GL_TRUE;
+
+ nr_dirty = nouveau_bo_download_dirty(ctx, bo);
+ if (nbo->cpu_mem) {
+ if (nr_dirty && nbo->cpu_mem != nbo->gpu_mem)
+ nouveau_notifier_wait_nop(ctx, nmesa->syncNotifier,
+ NvSubMemFormat);
+ DEBUG("..destroy cpu_mem buffer\n");
+ nbo->cpu_mem_sys = malloc(bo->Size);
+ assert(nbo->cpu_mem_sys);
+ _mesa_memcpy(nbo->cpu_mem_sys, nbo->cpu_mem->map, bo->Size);
+ if (nbo->cpu_mem == nbo->gpu_mem)
+ nbo->cpu_mem = NULL;
+ else
+ NOUVEAU_MEM_FREE(nbo->cpu_mem);
+ }
+ NOUVEAU_MEM_FREE(nbo->gpu_mem);
+
+ bo->OnCard = GL_FALSE;
+ return GL_TRUE;
+}
+
+static void
+nouveau_bo_choose_storage_method(GLcontext *ctx, GLenum usage,
+ struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ GLuint gpu_type = 0;
+ GLuint cpu_type = 0;
+
+ switch (usage) {
+ /* Client source, changes often, used by GL many times */
+ case GL_DYNAMIC_DRAW_ARB:
+ gpu_type = NOUVEAU_MEM_AGP | NOUVEAU_MEM_FB_ACCEPTABLE;
+ cpu_type = NOUVEAU_MEM_AGP;
+ break;
+ /* GL source, changes often, client reads many times */
+ case GL_DYNAMIC_READ_ARB:
+ /* Client source, specified once, used by GL many times */
+ case GL_STATIC_DRAW_ARB:
+ /* GL source, specified once, client reads many times */
+ case GL_STATIC_READ_ARB:
+ /* Client source, specified once, used by GL a few times */
+ case GL_STREAM_DRAW_ARB:
+ /* GL source, specified once, client reads a few times */
+ case GL_STREAM_READ_ARB:
+ /* GL source, changes often, used by GL many times*/
+ case GL_DYNAMIC_COPY_ARB:
+ /* GL source, specified once, used by GL many times */
+ case GL_STATIC_COPY_ARB:
+ /* GL source, specified once, used by GL a few times */
+ case GL_STREAM_COPY_ARB:
+ gpu_type = NOUVEAU_MEM_FB;
+ break;
+ default:
+ assert(0);
+ }
+
+ nbo->gpu_mem_flags = gpu_type;
+ nbo->cpu_mem_flags = cpu_type;
+ nbo->usage = usage;
+}
+
+void
+nouveau_bo_init_storage(GLcontext *ctx, GLuint valid_gpu_access,
+ GLsizeiptrARB size,
+ const GLvoid *data,
+ GLenum usage,
+ struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+
+ DEBUG("bo=%p\n", bo);
+
+ /* Free up previous buffers if we can't reuse them */
+ if (nbo->usage != usage ||
+ (nbo->gpu_mem && (nbo->gpu_mem->size != size))) {
+ if (nbo->cpu_mem_sys)
+ FREE(nbo->cpu_mem_sys);
+ if (nbo->cpu_mem) {
+ if (nbo->cpu_mem != nbo->gpu_mem)
+ NOUVEAU_MEM_FREE(nbo->cpu_mem);
+ else
+ nbo->cpu_mem = NULL;
+ }
+ if (nbo->gpu_mem)
+ NOUVEAU_MEM_FREE(nbo->gpu_mem);
+
+ bo->OnCard = GL_FALSE;
+ nbo->cpu_mem_sys = calloc(1, size);
+ }
+
+ nouveau_bo_choose_storage_method(ctx, usage, bo);
+ /* Force off flags that may not be ok for a given buffer */
+ nbo->gpu_mem_flags &= valid_gpu_access;
+
+ bo->Usage = usage;
+ bo->Size = size;
+
+ if (data) {
+ GLvoid *map = nouveau_bo_map(ctx, GL_WRITE_ONLY_ARB, bo);
+ _mesa_memcpy(map, data, size);
+ nouveau_bo_dirty_all(ctx, GL_FALSE, bo);
+ nouveau_bo_unmap(ctx, bo);
+ }
+}
+
+void *
+nouveau_bo_map(GLcontext *ctx, GLenum access, struct gl_buffer_object *bo)
+{
+ nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+
+ DEBUG("bo=%p, access=%s\n", bo, _mesa_lookup_enum_by_nr(access));
+
+ if (bo->OnCard &&
+ (access == GL_READ_ONLY_ARB || access == GL_READ_WRITE_ARB)) {
+ GLuint nr_dirty;
+
+ DEBUG("..on card\n");
+ nr_dirty = nouveau_bo_download_dirty(ctx, bo);
+
+ /* nouveau_bo_download_dirty won't wait unless it needs to
+ * free a temp buffer, which isn't the case if cpu_mem is
+ * present.
+ */
+ if (nr_dirty && nbo->cpu_mem && nbo->cpu_mem != nbo->gpu_mem)
+ nouveau_notifier_wait_nop(ctx, nmesa->syncNotifier,
+ NvSubMemFormat);
+ }
+
+ if (nbo->cpu_mem) {
+ DEBUG("..access via cpu_mem\n");
+ return nbo->cpu_mem->map;
+ } else {
+ DEBUG("..access via cpu_mem_sys\n");
+ return nbo->cpu_mem_sys;
+ }
+}
+
+void
+nouveau_bo_unmap(GLcontext *ctx, struct gl_buffer_object *bo)
+{
+ DEBUG("unmap bo=%p\n", bo);
+}
+
uint32_t
-nouveau_bufferobj_gpu_ref(GLcontext *ctx, GLenum access,
- struct gl_buffer_object *obj)
+nouveau_bo_gpu_ref(GLcontext *ctx, struct gl_buffer_object *bo)
{
- nouveau_buffer_object *nbo = (nouveau_buffer_object *)obj;
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
- DEBUG("obj=%p, access=%s\n", obj, _mesa_lookup_enum_by_nr(access));
+ assert(nbo->mapped == GL_FALSE);
- if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB)
- nbo->gpu_dirty = GL_TRUE;
+ DEBUG("gpu_ref\n");
+
+ if (!bo->OnCard) {
+ nouveau_bo_move_in(ctx, bo);
+ bo->OnCard = GL_TRUE;
+ }
+ nouveau_bo_upload_dirty(ctx, bo);
return nouveau_mem_gpu_offset_get(ctx, nbo->gpu_mem);
}
+void
+nouveau_bo_dirty_linear(GLcontext *ctx, GLboolean on_card,
+ uint32_t offset, uint32_t size,
+ struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_bufferobj_dirty *dirty;
+ uint32_t start = offset;
+ uint32_t end = offset + size;
+ int i;
+
+ if (nbo->cpu_mem == nbo->gpu_mem)
+ return;
+
+ dirty = on_card ? &nbo->gpu_dirty : &nbo->cpu_dirty;
+
+ DEBUG("on_card=%d, offset=%d, size=%d, bo=%p\n",
+ on_card, offset, size, bo);
+
+ for (i=0; i<dirty->nr_dirty; i++) {
+ nouveau_bufferobj_region *r = &dirty->dirty[i];
+
+ /* already dirty */
+ if (start >= r->start && end <= r->end) {
+ DEBUG("..already dirty\n");
+ return;
+ }
+
+ /* add to the end of a region */
+ if (start >= r->start && start <= r->end) {
+ if (end > r->end) {
+ DEBUG("..extend end of region\n");
+ r->end = end;
+ return;
+ }
+ }
+
+ /* add to the start of a region */
+ if (start < r->start && end >= r->end) {
+ DEBUG("..extend start of region\n");
+ r->start = start;
+ /* .. and to the end */
+ if (end > r->end) {
+ DEBUG("....and end\n");
+ r->end = end;
+ }
+ return;
+ }
+ }
+
+ /* new region */
+ DEBUG("..new dirty\n");
+ dirty->nr_dirty++;
+ dirty->dirty = realloc(dirty->dirty,
+ sizeof(nouveau_bufferobj_region) *
+ dirty->nr_dirty);
+ dirty->dirty[dirty->nr_dirty - 1].start = start;
+ dirty->dirty[dirty->nr_dirty - 1].end = end;
+}
+
+void
+nouveau_bo_dirty_all(GLcontext *ctx, GLboolean on_card,
+ struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_bufferobj_dirty *dirty;
+
+ dirty = on_card ? &nbo->gpu_dirty : &nbo->cpu_dirty;
+
+ DEBUG("dirty all\n");
+ if (dirty->nr_dirty) {
+ FREE(dirty->dirty);
+ dirty->dirty = NULL;
+ dirty->nr_dirty = 0;
+ }
+
+ nouveau_bo_dirty_linear(ctx, on_card, 0, bo->Size, bo);
+}
+
+GLuint
+nouveau_bo_upload_dirty(GLcontext *ctx, struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_bufferobj_dirty *dirty = &nbo->cpu_dirty;
+ GLuint nr_dirty;
+ int i;
+
+ nr_dirty = dirty->nr_dirty;
+ if (!nr_dirty) {
+ DEBUG("clean\n");
+ return nr_dirty;
+ }
+
+ for (i=0; i<nr_dirty; i++) {
+ nouveau_bufferobj_region *r = &dirty->dirty[i];
+
+ DEBUG("dirty %d: o=0x%08x, s=0x%08x\n",
+ i, r->start, r->end - r->start);
+ nouveau_bo_upload_to_screen(ctx,
+ r->start, r->end - r->start, bo);
+ }
+
+ FREE(dirty->dirty);
+ dirty->dirty = NULL;
+ dirty->nr_dirty = 0;
+
+ return nr_dirty;
+}
+
+GLuint
+nouveau_bo_download_dirty(GLcontext *ctx, struct gl_buffer_object *bo)
+{
+ nouveau_buffer_object *nbo = (nouveau_buffer_object *)bo;
+ nouveau_bufferobj_dirty *dirty = &nbo->gpu_dirty;
+ GLuint nr_dirty;
+ int i;
+
+ nr_dirty = dirty->nr_dirty;
+ if (nr_dirty) {
+ DEBUG("clean\n");
+ return nr_dirty;
+ }
+
+ for (i=0; i<nr_dirty; i++) {
+ nouveau_bufferobj_region *r = &dirty->dirty[i];
+
+ DEBUG("dirty %d: o=0x%08x, s=0x%08x\n",
+ i, r->start, r->end - r->start);
+ nouveau_bo_download_from_screen(ctx,
+ r->start,
+ r->end - r->start, bo);
+ }
+
+ FREE(dirty->dirty);
+ dirty->dirty = NULL;
+ dirty->nr_dirty = 0;
+
+ return nr_dirty;
+}
+
static void
nouveauBindBuffer(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
{
nouveau_buffer_object *nbo;
nbo = CALLOC_STRUCT(nouveau_buffer_object_t);
- DEBUG("name=0x%08x, target=%s, obj=%p\n",
- buffer, _mesa_lookup_enum_by_nr(target), nbo);
- _mesa_initialize_buffer_object(&nbo->mesa, buffer, target);
- return &nbo->mesa;
+ if (nbo)
+ _mesa_initialize_buffer_object(&nbo->mesa, buffer, target);
+ DEBUG("bo=%p\n", nbo);
+
+ return nbo ? &nbo->mesa : NULL;
}
static void
{
nouveau_buffer_object *nbo = (nouveau_buffer_object *)obj;
- DEBUG("obj=%p\n", obj);
+ if (nbo->gpu_dirty.nr_dirty)
+ FREE(nbo->gpu_dirty.dirty);
+ if (nbo->cpu_dirty.nr_dirty)
+ FREE(nbo->cpu_dirty.dirty);
+ if (nbo->cpu_mem) nouveau_mem_free(ctx, nbo->cpu_mem);
+ if (nbo->gpu_mem) nouveau_mem_free(ctx, nbo->gpu_mem);
- if (nbo->gpu_mem) {
- nouveau_mem_free(ctx, nbo->gpu_mem);
- }
_mesa_delete_buffer_object(ctx, obj);
}
const GLvoid *data, GLenum usage,
struct gl_buffer_object *obj)
{
- nouveau_buffer_object *nbo = (nouveau_buffer_object *)obj;
+ GLuint gpu_flags;
- DEBUG("obj=%p, target=%s, usage=%s, size=%d, data=%p\n",
- obj,
+ DEBUG("target=%s, size=%d, data=%p, usage=%s, obj=%p\n",
_mesa_lookup_enum_by_nr(target),
+ (GLuint)size, data,
_mesa_lookup_enum_by_nr(usage),
- (unsigned int)size,
- data);
-
- if (nbo->gpu_mem && nbo->gpu_mem->size != size)
- nouveau_mem_free(ctx, nbo->gpu_mem);
-
- /* Always have the GPU access the data from VRAM if possible. For
- * some "usage" values it may be better from AGP be default?
- *
- * TODO: At some point we should drop the NOUVEAU_MEM_MAPPED flag.
- * TODO: Use the NOUVEAU_MEM_AGP_ACCEPTABLE flag.
- * TODO: What about PCI-E and shared system memory?
- */
- if (!nbo->gpu_mem)
- nbo->gpu_mem = nouveau_mem_alloc(ctx,
- NOUVEAU_MEM_FB |
- NOUVEAU_MEM_MAPPED,
- size,
- 0);
-
- if (!nbo->gpu_mem) {
- MESSAGE("AIII bufferobj malloc failed\n");
- return;
+ obj);
+
+ switch (target) {
+ case GL_ELEMENT_ARRAY_BUFFER_ARB:
+ gpu_flags = 0;
+ break;
+ default:
+ gpu_flags = NOUVEAU_BO_VRAM_OK | NOUVEAU_BO_AGP_OK;
+ break;
}
-
- obj->Usage = usage;
- obj->Size = size;
- if (!data)
- return;
-
- ctx->Driver.MapBuffer(ctx, target, GL_WRITE_ONLY_ARB, obj);
- _mesa_memcpy(nbo->cpu_mem->map, data, size);
- ctx->Driver.UnmapBuffer(ctx, target, obj);
+ nouveau_bo_init_storage(ctx, gpu_flags, size, data, usage, obj);
}
-/*TODO: we don't need to DMA the entire buffer like MapBuffer does.. */
static void
nouveauBufferSubData(GLcontext *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, const GLvoid *data,
struct gl_buffer_object *obj)
{
- DEBUG("obj=%p, target=%s, offset=0x%x, size=%d, data=%p\n",
- obj,
+ GLvoid *out;
+
+ DEBUG("target=%s, offset=0x%x, size=%d, data=%p, obj=%p\n",
_mesa_lookup_enum_by_nr(target),
- (unsigned int)offset,
- (unsigned int)size,
- data);
+ (GLuint)offset, (GLuint)size, data, obj);
- ctx->Driver.MapBuffer(ctx, target, GL_WRITE_ONLY_ARB, obj);
- _mesa_memcpy((GLubyte *)obj->Pointer + offset, data, size);
- ctx->Driver.UnmapBuffer(ctx, target, obj);
+ out = nouveau_bo_map(ctx, GL_WRITE_ONLY_ARB, obj);
+ _mesa_memcpy(out + offset, data, size);
+ nouveau_bo_dirty_linear(ctx, GL_FALSE, offset, size, obj);
+ nouveau_bo_unmap(ctx, obj);
}
-/*TODO: we don't need to DMA the entire buffer like MapBuffer does.. */
static void
nouveauGetBufferSubData(GLcontext *ctx, GLenum target, GLintptrARB offset,
GLsizeiptrARB size, GLvoid *data,
struct gl_buffer_object *obj)
{
- DEBUG("obj=%p, target=%s, offset=0x%x, size=%d, data=%p\n",
- obj,
+ const GLvoid *in;
+
+ DEBUG("target=%s, offset=0x%x, size=%d, data=%p, obj=%p\n",
_mesa_lookup_enum_by_nr(target),
- (unsigned int)offset,
- (unsigned int)size,
- data);
+ (GLuint)offset, (GLuint)size, data, obj);
- ctx->Driver.MapBuffer(ctx, target, GL_READ_ONLY_ARB, obj);
- _mesa_memcpy(data, (GLubyte *)obj->Pointer + offset, size);
- ctx->Driver.UnmapBuffer(ctx, target, obj);
+ in = nouveau_bo_map(ctx, GL_READ_ONLY_ARB, obj);
+ _mesa_memcpy(data, in + offset, size);
+ nouveau_bo_unmap(ctx, obj);
}
static void *
nouveauMapBuffer(GLcontext *ctx, GLenum target, GLenum access,
struct gl_buffer_object *obj)
{
- nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
- nouveau_buffer_object *nbo = (nouveau_buffer_object *)obj;
-
- DEBUG("obj=%p, target=%s, access=%s\n",
- obj,
+ DEBUG("target=%s, access=%s, obj=%p\n",
_mesa_lookup_enum_by_nr(target),
- _mesa_lookup_enum_by_nr(access));
+ _mesa_lookup_enum_by_nr(access),
+ obj
+ );
- if (obj->Pointer) {
- DEBUG("already mapped, return NULL\n");
+ /* Already mapped.. */
+ if (obj->Pointer)
return NULL;
- }
-#ifdef ALLOW_MULTI_SUBCHANNEL
- /* If GPU is accessing the data from VRAM, copy to faster AGP memory
- * before CPU access to the buffer.
+ /* Have to pass READ_WRITE here, nouveau_bo_map will only ensure that
+ * the cpu_mem buffer is up-to-date if we ask for read access.
+ *
+ * However, even if the client only asks for write access, we're still
+ * forced to reupload the entire buffer. So, we need the cpu_mem buffer
+ * to have the correct data all the time.
*/
- if (nbo->gpu_mem->type & NOUVEAU_MEM_FB) {
- DEBUG("Data in VRAM, copying to AGP for CPU access\n");
-
- /* This can happen if BufferData grows the GPU-access buffer */
- if (nbo->cpu_mem && nbo->cpu_mem->size != nbo->gpu_mem->size) {
- nouveau_mem_free(ctx, nbo->cpu_mem);
- nbo->cpu_mem = NULL;
- }
-
- if (!nbo->cpu_mem) {
- nbo->cpu_mem = nouveau_mem_alloc(ctx,
- NOUVEAU_MEM_AGP |
- NOUVEAU_MEM_MAPPED,
- nbo->gpu_mem->size,
- 0);
+ obj->Pointer = nouveau_bo_map(ctx, GL_READ_WRITE_ARB, obj);
- /* Mark GPU data as modified, so it gets copied to
- * the new buffer */
- nbo->gpu_dirty = GL_TRUE;
- }
-
- if (nbo->cpu_mem && nbo->gpu_dirty) {
- nouveau_memformat_flat_emit(ctx, nbo->cpu_mem,
- nbo->gpu_mem,
- 0, 0,
- nbo->gpu_mem->size);
-
- nouveau_notifier_wait_nop(ctx,
- nmesa->syncNotifier,
- NvSubMemFormat);
- nbo->gpu_dirty = GL_FALSE;
- }
-
- /* buffer isn't guaranteed to be up-to-date on the card now */
- nbo->cpu_dirty = GL_TRUE;
- }
-#endif
-
- /* If the copy to AGP failed for some reason, just return a pointer
- * directly to vram..
+ /* The GL spec says that a client attempting to write to a bufferobj
+ * mapped READ_ONLY object may have unpredictable results, possibly
+ * even program termination.
+ *
+ * We're going to use this, and only mark the buffer as dirtied if
+ * the client asks for write access.
*/
- if (!nbo->cpu_mem) {
- DEBUG("Returning direct pointer to VRAM\n");
- nbo->cpu_mem = nbo->gpu_mem;
- nbo->cpu_dirty = GL_FALSE;
+ if (target != GL_READ_ONLY_ARB) {
+ /* We have no way of knowing what was modified by the client,
+ * so the entire buffer gets dirtied. */
+ nouveau_bo_dirty_all(ctx, GL_FALSE, obj);
}
- obj->Pointer = nbo->cpu_mem->map;
return obj->Pointer;
}
static GLboolean
nouveauUnmapBuffer(GLcontext *ctx, GLenum target, struct gl_buffer_object *obj)
{
- nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
- nouveau_buffer_object *nbo = (nouveau_buffer_object *)obj;
-
- DEBUG("obj=%p, target=%s\n", obj, _mesa_lookup_enum_by_nr(target));
+ DEBUG("target=%s, obj=%p\n", _mesa_lookup_enum_by_nr(target), obj);
-#ifdef ALLOW_MULTI_SUBCHANNEL
- if (nbo->cpu_dirty && nbo->cpu_mem != nbo->gpu_mem) {
- DEBUG("Copying potentially modified data back to GPU\n");
-
- /* blit from GPU buffer -> CPU buffer */
- nouveau_memformat_flat_emit(ctx, nbo->gpu_mem, nbo->cpu_mem,
- 0, 0, nbo->cpu_mem->size);
-
- /* buffer is now up-to-date on the hardware (or rather, will
- * be by the time any other commands in this channel reference
- * the data.)
- */
- nbo->cpu_dirty = GL_FALSE;
-
- /* we can avoid this wait in some cases.. */
- nouveau_notifier_wait_nop(ctx,
- nmesa->syncNotifier,
- NvSubMemFormat);
-
- /* If it's likely CPU access to the buffer will occur often,
- * keep the cpu_mem around to avoid repeated allocs.
- */
- if (obj->Usage != GL_DYNAMIC_DRAW_ARB) {
-
- nouveau_mem_free(ctx, nbo->cpu_mem);
- nbo->cpu_mem = NULL;
- }
- }
-#endif
+ assert(obj->Pointer);
+ nouveau_bo_unmap(ctx, obj);
obj->Pointer = NULL;
return GL_TRUE;
}
projects / mesa.git / commitdiff