/************************************************************************** * * Copyright © 2007 Red Hat Inc. * Copyright © 2007 Intel Corporation * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * **************************************************************************/ /* * Authors: Thomas Hellström * Keith Whitwell * Eric Anholt * Dave Airlie */ #include #include #include #include #include #include #include "errno.h" #include "mtypes.h" #include "dri_bufmgr.h" #include "string.h" #include "imports.h" #include "i915_drm.h" #include "intel_bufmgr_ttm.h" #define DBG(...) do { \ if (bufmgr_ttm->bufmgr.debug) \ fprintf(stderr, __VA_ARGS__); \ } while (0) /* * These bits are always specified in each validation * request. Other bits are not supported at this point * as it would require a bit of investigation to figure * out what mask value should be used. */ #define INTEL_BO_MASK (DRM_BO_MASK_MEM | \ DRM_BO_FLAG_READ | \ DRM_BO_FLAG_WRITE | \ DRM_BO_FLAG_EXE) struct intel_validate_entry { dri_bo *bo; struct drm_i915_op_arg bo_arg; }; struct dri_ttm_bo_bucket_entry { drmBO drm_bo; struct dri_ttm_bo_bucket_entry *next; }; struct dri_ttm_bo_bucket { struct dri_ttm_bo_bucket_entry *head; struct dri_ttm_bo_bucket_entry **tail; /** * Limit on the number of entries in this bucket. * * 0 means that this caching at this bucket size is disabled. * -1 means that there is no limit to caching at this size. */ int max_entries; int num_entries; }; /* Arbitrarily chosen, 16 means that the maximum size we'll cache for reuse * is 1 << 16 pages, or 256MB. */ #define INTEL_TTM_BO_BUCKETS 16 typedef struct _dri_bufmgr_ttm { dri_bufmgr bufmgr; int fd; unsigned int fence_type; unsigned int fence_type_flush; uint32_t max_relocs; struct intel_validate_entry *validate_array; int validate_array_size; int validate_count; /** Array of lists of cached drmBOs of power-of-two sizes */ struct dri_ttm_bo_bucket cache_bucket[INTEL_TTM_BO_BUCKETS]; } dri_bufmgr_ttm; /** * Private information associated with a relocation that isn't already stored * in the relocation buffer to be passed to the kernel. */ struct dri_ttm_reloc { dri_bo *target_buf; uint64_t validate_flags; /** Offset of target_buf after last execution of this relocation entry. */ unsigned int last_target_offset; }; typedef struct _dri_bo_ttm { dri_bo bo; int refcount; unsigned int map_count; drmBO drm_bo; const char *name; uint64_t last_flags; /** * Index of the buffer within the validation list while preparing a * batchbuffer execution. */ int validate_index; /** DRM buffer object containing relocation list */ uint32_t *reloc_buf_data; struct dri_ttm_reloc *relocs; /** * Indicates that the buffer may be shared with other processes, so we * can't hold maps beyond when the user does. */ GLboolean shared; GLboolean delayed_unmap; /* Virtual address from the dri_bo_map whose unmap was delayed. */ void *saved_virtual; } dri_bo_ttm; typedef struct _dri_fence_ttm { dri_fence fence; int refcount; const char *name; drmFence drm_fence; } dri_fence_ttm; static int logbase2(int n) { GLint i = 1; GLint log2 = 0; while (n > i) { i *= 2; log2++; } return log2; } static struct dri_ttm_bo_bucket * dri_ttm_bo_bucket_for_size(dri_bufmgr_ttm *bufmgr_ttm, unsigned long size) { int i; /* We only do buckets in power of two increments */ if ((size & (size - 1)) != 0) return NULL; /* We should only see sizes rounded to pages. */ assert((size % 4096) == 0); /* We always allocate in units of pages */ i = ffs(size / 4096) - 1; if (i >= INTEL_TTM_BO_BUCKETS) return NULL; return &bufmgr_ttm->cache_bucket[i]; } static void dri_ttm_dump_validation_list(dri_bufmgr_ttm *bufmgr_ttm) { int i, j; for (i = 0; i < bufmgr_ttm->validate_count; i++) { dri_bo *bo = bufmgr_ttm->validate_array[i].bo; dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; if (bo_ttm->reloc_buf_data != NULL) { for (j = 0; j < (bo_ttm->reloc_buf_data[0] & 0xffff); j++) { uint32_t *reloc_entry = bo_ttm->reloc_buf_data + I915_RELOC_HEADER + j * I915_RELOC0_STRIDE; dri_bo *target_bo = bo_ttm->relocs[j].target_buf; dri_bo_ttm *target_ttm = (dri_bo_ttm *)target_bo; DBG("%2d: %s@0x%08x -> %s@0x%08lx + 0x%08x\n", i, bo_ttm->name, reloc_entry[0], target_ttm->name, target_bo->offset, reloc_entry[1]); } } else { DBG("%2d: %s\n", i, bo_ttm->name); } } } /** * Adds the given buffer to the list of buffers to be validated (moved into the * appropriate memory type) with the next batch submission. * * If a buffer is validated multiple times in a batch submission, it ends up * with the intersection of the memory type flags and the union of the * access flags. */ static void intel_add_validate_buffer(dri_bo *buf, uint64_t flags) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)buf->bufmgr; dri_bo_ttm *ttm_buf = (dri_bo_ttm *)buf; /* If we delayed doing an unmap to mitigate map/unmap syscall thrashing, * do that now. */ if (ttm_buf->delayed_unmap) { drmBOUnmap(bufmgr_ttm->fd, &ttm_buf->drm_bo); ttm_buf->delayed_unmap = GL_FALSE; } if (ttm_buf->validate_index == -1) { struct intel_validate_entry *entry; struct drm_i915_op_arg *arg; struct drm_bo_op_req *req; int index; /* Extend the array of validation entries as necessary. */ if (bufmgr_ttm->validate_count == bufmgr_ttm->validate_array_size) { int i, new_size = bufmgr_ttm->validate_array_size * 2; if (new_size == 0) new_size = 5; bufmgr_ttm->validate_array = realloc(bufmgr_ttm->validate_array, sizeof(struct intel_validate_entry) * new_size); bufmgr_ttm->validate_array_size = new_size; /* Update pointers for realloced mem. */ for (i = 0; i < bufmgr_ttm->validate_count - 1; i++) { bufmgr_ttm->validate_array[i].bo_arg.next = (unsigned long) &bufmgr_ttm->validate_array[i + 1].bo_arg; } } /* Pick out the new array entry for ourselves */ index = bufmgr_ttm->validate_count; ttm_buf->validate_index = index; entry = &bufmgr_ttm->validate_array[index]; bufmgr_ttm->validate_count++; /* Fill in array entry */ entry->bo = buf; dri_bo_reference(buf); /* Fill in kernel arg */ arg = &entry->bo_arg; req = &arg->d.req; memset(arg, 0, sizeof(*arg)); req->bo_req.handle = ttm_buf->drm_bo.handle; req->op = drm_bo_validate; req->bo_req.flags = flags; req->bo_req.hint = 0; #ifdef DRM_BO_HINT_PRESUMED_OFFSET /* PRESUMED_OFFSET indicates that all relocations pointing at this * buffer have the correct offset. If any of our relocations don't, * this flag will be cleared off the buffer later in the relocation * processing. */ req->bo_req.hint |= DRM_BO_HINT_PRESUMED_OFFSET; req->bo_req.presumed_offset = buf->offset; #endif req->bo_req.mask = INTEL_BO_MASK; req->bo_req.fence_class = 0; /* Backwards compat. */ if (ttm_buf->reloc_buf_data != NULL) arg->reloc_ptr = (unsigned long)(void *)ttm_buf->reloc_buf_data; else arg->reloc_ptr = 0; /* Hook up the linked list of args for the kernel */ arg->next = 0; if (index != 0) { bufmgr_ttm->validate_array[index - 1].bo_arg.next = (unsigned long)arg; } } else { struct intel_validate_entry *entry = &bufmgr_ttm->validate_array[ttm_buf->validate_index]; struct drm_i915_op_arg *arg = &entry->bo_arg; struct drm_bo_op_req *req = &arg->d.req; uint64_t memFlags = req->bo_req.flags & flags & DRM_BO_MASK_MEM; uint64_t modeFlags = (req->bo_req.flags | flags) & ~DRM_BO_MASK_MEM; /* Buffer was already in the validate list. Extend its flags as * necessary. */ if (memFlags == 0) { fprintf(stderr, "%s: No shared memory types between " "0x%16llx and 0x%16llx\n", __FUNCTION__, req->bo_req.flags, flags); abort(); } if (flags & ~INTEL_BO_MASK) { fprintf(stderr, "%s: Flags bits 0x%16llx are not supposed to be used in a relocation\n", __FUNCTION__, flags & ~INTEL_BO_MASK); abort(); } req->bo_req.flags = memFlags | modeFlags; } } #define RELOC_BUF_SIZE(x) ((I915_RELOC_HEADER + x * I915_RELOC0_STRIDE) * \ sizeof(uint32_t)) static int intel_setup_reloc_list(dri_bo *bo) { dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bo->bufmgr; bo_ttm->relocs = calloc(bufmgr_ttm->max_relocs, sizeof(struct dri_ttm_reloc)); bo_ttm->reloc_buf_data = calloc(1, RELOC_BUF_SIZE(bufmgr_ttm->max_relocs)); /* Initialize the relocation list with the header: * DWORD 0: relocation count * DWORD 1: relocation type * DWORD 2+3: handle to next relocation list (currently none) 64-bits */ bo_ttm->reloc_buf_data[0] = 0; bo_ttm->reloc_buf_data[1] = I915_RELOC_TYPE_0; bo_ttm->reloc_buf_data[2] = 0; bo_ttm->reloc_buf_data[3] = 0; return 0; } #if 0 int driFenceSignaled(DriFenceObject * fence, unsigned type) { int signaled; int ret; if (fence == NULL) return GL_TRUE; ret = drmFenceSignaled(bufmgr_ttm->fd, &fence->fence, type, &signaled); BM_CKFATAL(ret); return signaled; } #endif static dri_bo * dri_ttm_alloc(dri_bufmgr *bufmgr, const char *name, unsigned long size, unsigned int alignment, uint64_t location_mask) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bufmgr; dri_bo_ttm *ttm_buf; unsigned int pageSize = getpagesize(); int ret; uint64_t flags; unsigned int hint; unsigned long alloc_size; struct dri_ttm_bo_bucket *bucket; GLboolean alloc_from_cache = GL_FALSE; ttm_buf = calloc(1, sizeof(*ttm_buf)); if (!ttm_buf) return NULL; /* The mask argument doesn't do anything for us that we want other than * determine which pool (TTM or local) the buffer is allocated into, so * just pass all of the allocation class flags. */ flags = location_mask | DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE | DRM_BO_FLAG_EXE; /* No hints we want to use. */ hint = 0; /* Round the allocated size up to a power of two number of pages. */ alloc_size = 1 << logbase2(size); if (alloc_size < pageSize) alloc_size = pageSize; bucket = dri_ttm_bo_bucket_for_size(bufmgr_ttm, alloc_size); /* If we don't have caching at this size, don't actually round the * allocation up. */ if (bucket == NULL || bucket->max_entries == 0) alloc_size = size; /* Get a buffer out of the cache if available */ if (bucket != NULL && bucket->num_entries > 0) { struct dri_ttm_bo_bucket_entry *entry = bucket->head; int busy; /* Check if the buffer is still in flight. If not, reuse it. */ ret = drmBOBusy(bufmgr_ttm->fd, &entry->drm_bo, &busy); alloc_from_cache = (ret == 0 && busy == 0); if (alloc_from_cache) { bucket->head = entry->next; if (entry->next == NULL) bucket->tail = &bucket->head; bucket->num_entries--; ttm_buf->drm_bo = entry->drm_bo; free(entry); } } if (!alloc_from_cache) { ret = drmBOCreate(bufmgr_ttm->fd, alloc_size, alignment / pageSize, NULL, flags, hint, &ttm_buf->drm_bo); if (ret != 0) { free(ttm_buf); return NULL; } } ttm_buf->bo.size = size; ttm_buf->bo.offset = ttm_buf->drm_bo.offset; ttm_buf->bo.virtual = NULL; ttm_buf->bo.bufmgr = bufmgr; ttm_buf->name = name; ttm_buf->refcount = 1; ttm_buf->reloc_buf_data = NULL; ttm_buf->relocs = NULL; ttm_buf->last_flags = ttm_buf->drm_bo.flags; ttm_buf->shared = GL_FALSE; ttm_buf->delayed_unmap = GL_FALSE; ttm_buf->validate_index = -1; DBG("bo_create: %p (%s) %ldb\n", &ttm_buf->bo, ttm_buf->name, size); return &ttm_buf->bo; } /* Our TTM backend doesn't allow creation of static buffers, as that requires * privelege for the non-fake case, and the lock in the fake case where we were * working around the X Server not creating buffers and passing handles to us. */ static dri_bo * dri_ttm_alloc_static(dri_bufmgr *bufmgr, const char *name, unsigned long offset, unsigned long size, void *virtual, uint64_t location_mask) { return NULL; } /** * Returns a dri_bo wrapping the given buffer object handle. * * This can be used when one application needs to pass a buffer object * to another. */ dri_bo * intel_ttm_bo_create_from_handle(dri_bufmgr *bufmgr, const char *name, unsigned int handle) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bufmgr; dri_bo_ttm *ttm_buf; int ret; ttm_buf = calloc(1, sizeof(*ttm_buf)); if (!ttm_buf) return NULL; ret = drmBOReference(bufmgr_ttm->fd, handle, &ttm_buf->drm_bo); if (ret != 0) { fprintf(stderr, "Couldn't reference %s handle 0x%08x: %s\n", name, handle, strerror(-ret)); free(ttm_buf); return NULL; } ttm_buf->bo.size = ttm_buf->drm_bo.size; ttm_buf->bo.offset = ttm_buf->drm_bo.offset; ttm_buf->bo.virtual = NULL; ttm_buf->bo.bufmgr = bufmgr; ttm_buf->name = name; ttm_buf->refcount = 1; ttm_buf->reloc_buf_data = NULL; ttm_buf->relocs = NULL; ttm_buf->last_flags = ttm_buf->drm_bo.flags; ttm_buf->shared = GL_TRUE; ttm_buf->delayed_unmap = GL_FALSE; ttm_buf->validate_index = -1; DBG("bo_create_from_handle: %p %08x (%s)\n", &ttm_buf->bo, handle, ttm_buf->name); return &ttm_buf->bo; } static void dri_ttm_bo_reference(dri_bo *buf) { dri_bo_ttm *ttm_buf = (dri_bo_ttm *)buf; ttm_buf->refcount++; } static void dri_ttm_bo_unreference(dri_bo *buf) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)buf->bufmgr; dri_bo_ttm *ttm_buf = (dri_bo_ttm *)buf; if (!buf) return; if (--ttm_buf->refcount == 0) { struct dri_ttm_bo_bucket *bucket; int ret; assert(ttm_buf->map_count == 0); if (ttm_buf->reloc_buf_data) { int i; /* Unreference all the target buffers */ for (i = 0; i < (ttm_buf->reloc_buf_data[0] & 0xffff); i++) dri_bo_unreference(ttm_buf->relocs[i].target_buf); free(ttm_buf->relocs); /* Free the kernel BO containing relocation entries */ free(ttm_buf->reloc_buf_data); ttm_buf->reloc_buf_data = NULL; } if (ttm_buf->delayed_unmap) { int ret = drmBOUnmap(bufmgr_ttm->fd, &ttm_buf->drm_bo); if (ret != 0) { fprintf(stderr, "%s:%d: Error unmapping buffer %s: %s.\n", __FILE__, __LINE__, ttm_buf->name, strerror(-ret)); } } bucket = dri_ttm_bo_bucket_for_size(bufmgr_ttm, ttm_buf->drm_bo.size); /* Put the buffer into our internal cache for reuse if we can. */ if (!ttm_buf->shared && bucket != NULL && (bucket->max_entries == -1 || (bucket->max_entries > 0 && bucket->num_entries < bucket->max_entries))) { struct dri_ttm_bo_bucket_entry *entry; entry = calloc(1, sizeof(*entry)); entry->drm_bo = ttm_buf->drm_bo; entry->next = NULL; *bucket->tail = entry; bucket->tail = &entry->next; bucket->num_entries++; } else { /* Decrement the kernel refcount for the buffer. */ ret = drmBOUnreference(bufmgr_ttm->fd, &ttm_buf->drm_bo); if (ret != 0) { fprintf(stderr, "drmBOUnreference failed (%s): %s\n", ttm_buf->name, strerror(-ret)); } } DBG("bo_unreference final: %p (%s)\n", &ttm_buf->bo, ttm_buf->name); free(buf); return; } } static int dri_ttm_bo_map(dri_bo *buf, GLboolean write_enable) { dri_bufmgr_ttm *bufmgr_ttm; dri_bo_ttm *ttm_buf = (dri_bo_ttm *)buf; uint64_t flags; int ret; bufmgr_ttm = (dri_bufmgr_ttm *)buf->bufmgr; flags = DRM_BO_FLAG_READ; if (write_enable) flags |= DRM_BO_FLAG_WRITE; /* Allow recursive mapping. Mesa may recursively map buffers with * nested display loops. */ if (ttm_buf->map_count++ != 0) return 0; assert(buf->virtual == NULL); DBG("bo_map: %p (%s)\n", &ttm_buf->bo, ttm_buf->name); /* XXX: What about if we're upgrading from READ to WRITE? */ if (ttm_buf->delayed_unmap) { buf->virtual = ttm_buf->saved_virtual; return 0; } ret = drmBOMap(bufmgr_ttm->fd, &ttm_buf->drm_bo, flags, 0, &buf->virtual); if (ret != 0) { fprintf(stderr, "%s:%d: Error mapping buffer %s: %s .\n", __FILE__, __LINE__, ttm_buf->name, strerror(-ret)); } return ret; } static int dri_ttm_bo_unmap(dri_bo *buf) { dri_bufmgr_ttm *bufmgr_ttm; dri_bo_ttm *ttm_buf = (dri_bo_ttm *)buf; int ret; if (buf == NULL) return 0; assert(ttm_buf->map_count != 0); if (--ttm_buf->map_count != 0) return 0; bufmgr_ttm = (dri_bufmgr_ttm *)buf->bufmgr; assert(buf->virtual != NULL); DBG("bo_unmap: %p (%s)\n", &ttm_buf->bo, ttm_buf->name); if (!ttm_buf->shared) { ttm_buf->saved_virtual = buf->virtual; ttm_buf->delayed_unmap = GL_TRUE; buf->virtual = NULL; return 0; } buf->virtual = NULL; ret = drmBOUnmap(bufmgr_ttm->fd, &ttm_buf->drm_bo); if (ret != 0) { fprintf(stderr, "%s:%d: Error unmapping buffer %s: %s.\n", __FILE__, __LINE__, ttm_buf->name, strerror(-ret)); } return ret; } /** * Returns a dri_bo wrapping the given buffer object handle. * * This can be used when one application needs to pass a buffer object * to another. */ dri_fence * intel_ttm_fence_create_from_arg(dri_bufmgr *bufmgr, const char *name, drm_fence_arg_t *arg) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bufmgr; dri_fence_ttm *ttm_fence; ttm_fence = malloc(sizeof(*ttm_fence)); if (!ttm_fence) return NULL; ttm_fence->drm_fence.handle = arg->handle; ttm_fence->drm_fence.fence_class = arg->fence_class; ttm_fence->drm_fence.type = arg->type; ttm_fence->drm_fence.flags = arg->flags; ttm_fence->drm_fence.signaled = 0; ttm_fence->drm_fence.sequence = arg->sequence; ttm_fence->fence.bufmgr = bufmgr; ttm_fence->name = name; ttm_fence->refcount = 1; DBG("fence_create_from_handle: %p (%s)\n", &ttm_fence->fence, ttm_fence->name); return &ttm_fence->fence; } static void dri_ttm_fence_reference(dri_fence *fence) { dri_fence_ttm *fence_ttm = (dri_fence_ttm *)fence; dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)fence->bufmgr; ++fence_ttm->refcount; DBG("fence_reference: %p (%s)\n", &fence_ttm->fence, fence_ttm->name); } static void dri_ttm_fence_unreference(dri_fence *fence) { dri_fence_ttm *fence_ttm = (dri_fence_ttm *)fence; dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)fence->bufmgr; if (!fence) return; DBG("fence_unreference: %p (%s)\n", &fence_ttm->fence, fence_ttm->name); if (--fence_ttm->refcount == 0) { int ret; ret = drmFenceUnreference(bufmgr_ttm->fd, &fence_ttm->drm_fence); if (ret != 0) { fprintf(stderr, "drmFenceUnreference failed (%s): %s\n", fence_ttm->name, strerror(-ret)); } free(fence); return; } } static void dri_ttm_fence_wait(dri_fence *fence) { dri_fence_ttm *fence_ttm = (dri_fence_ttm *)fence; dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)fence->bufmgr; int ret; ret = drmFenceWait(bufmgr_ttm->fd, DRM_FENCE_FLAG_WAIT_LAZY, &fence_ttm->drm_fence, 0); if (ret != 0) { fprintf(stderr, "%s:%d: Error waiting for fence %s: %s.\n", __FILE__, __LINE__, fence_ttm->name, strerror(-ret)); abort(); } DBG("fence_wait: %p (%s)\n", &fence_ttm->fence, fence_ttm->name); } static void dri_bufmgr_ttm_destroy(dri_bufmgr *bufmgr) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bufmgr; int i; free(bufmgr_ttm->validate_array); /* Free any cached buffer objects we were going to reuse */ for (i = 0; i < INTEL_TTM_BO_BUCKETS; i++) { struct dri_ttm_bo_bucket *bucket = &bufmgr_ttm->cache_bucket[i]; struct dri_ttm_bo_bucket_entry *entry; while ((entry = bucket->head) != NULL) { int ret; bucket->head = entry->next; if (entry->next == NULL) bucket->tail = &bucket->head; bucket->num_entries--; /* Decrement the kernel refcount for the buffer. */ ret = drmBOUnreference(bufmgr_ttm->fd, &entry->drm_bo); if (ret != 0) { fprintf(stderr, "drmBOUnreference failed: %s\n", strerror(-ret)); } free(entry); } } free(bufmgr); } /** * Adds the target buffer to the validation list and adds the relocation * to the reloc_buffer's relocation list. * * The relocation entry at the given offset must already contain the * precomputed relocation value, because the kernel will optimize out * the relocation entry write when the buffer hasn't moved from the * last known offset in target_buf. */ static int dri_ttm_emit_reloc(dri_bo *reloc_buf, uint64_t flags, GLuint delta, GLuint offset, dri_bo *target_buf) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)reloc_buf->bufmgr; dri_bo_ttm *reloc_buf_ttm = (dri_bo_ttm *)reloc_buf; dri_bo_ttm *target_buf_ttm = (dri_bo_ttm *)target_buf; int num_relocs; uint32_t *this_reloc; /* Create a new relocation list if needed */ if (reloc_buf_ttm->reloc_buf_data == NULL) intel_setup_reloc_list(reloc_buf); num_relocs = reloc_buf_ttm->reloc_buf_data[0]; /* Check overflow */ assert(num_relocs < bufmgr_ttm->max_relocs); this_reloc = reloc_buf_ttm->reloc_buf_data + I915_RELOC_HEADER + num_relocs * I915_RELOC0_STRIDE; this_reloc[0] = offset; this_reloc[1] = delta; this_reloc[2] = target_buf_ttm->drm_bo.handle; /* To be filled in at exec time */ this_reloc[3] = 0; reloc_buf_ttm->relocs[num_relocs].validate_flags = flags; reloc_buf_ttm->relocs[num_relocs].target_buf = target_buf; dri_bo_reference(target_buf); reloc_buf_ttm->reloc_buf_data[0]++; /* Increment relocation count */ /* Check wraparound */ assert(reloc_buf_ttm->reloc_buf_data[0] != 0); return 0; } /** * Walk the tree of relocations rooted at BO and accumulate the list of * validations to be performed and update the relocation buffers with * index values into the validation list. */ static void dri_ttm_bo_process_reloc(dri_bo *bo) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bo->bufmgr; dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; unsigned int nr_relocs; int i; if (bo_ttm->reloc_buf_data == NULL) return; nr_relocs = bo_ttm->reloc_buf_data[0] & 0xffff; for (i = 0; i < nr_relocs; i++) { struct dri_ttm_reloc *r = &bo_ttm->relocs[i]; /* Continue walking the tree depth-first. */ dri_ttm_bo_process_reloc(r->target_buf); /* Add the target to the validate list */ intel_add_validate_buffer(r->target_buf, r->validate_flags); /* Clear the PRESUMED_OFFSET flag from the validate list entry of the * target if this buffer has a stale relocated pointer at it. */ if (r->last_target_offset != r->target_buf->offset) { dri_bo_ttm *target_buf_ttm = (dri_bo_ttm *)r->target_buf; struct intel_validate_entry *entry = &bufmgr_ttm->validate_array[target_buf_ttm->validate_index]; entry->bo_arg.d.req.bo_req.hint &= ~DRM_BO_HINT_PRESUMED_OFFSET; } } } static void * dri_ttm_process_reloc(dri_bo *batch_buf, GLuint *count) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)batch_buf->bufmgr; /* Update indices and set up the validate list. */ dri_ttm_bo_process_reloc(batch_buf); /* Add the batch buffer to the validation list. There are no relocations * pointing to it. */ intel_add_validate_buffer(batch_buf, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_EXE); *count = bufmgr_ttm->validate_count; return &bufmgr_ttm->validate_array[0].bo_arg; } static const char * intel_get_flags_mem_type_string(uint64_t flags) { switch (flags & DRM_BO_MASK_MEM) { case DRM_BO_FLAG_MEM_LOCAL: return "local"; case DRM_BO_FLAG_MEM_TT: return "ttm"; case DRM_BO_FLAG_MEM_VRAM: return "vram"; case DRM_BO_FLAG_MEM_PRIV0: return "priv0"; case DRM_BO_FLAG_MEM_PRIV1: return "priv1"; case DRM_BO_FLAG_MEM_PRIV2: return "priv2"; case DRM_BO_FLAG_MEM_PRIV3: return "priv3"; case DRM_BO_FLAG_MEM_PRIV4: return "priv4"; default: return NULL; } } static const char * intel_get_flags_caching_string(uint64_t flags) { switch (flags & (DRM_BO_FLAG_CACHED | DRM_BO_FLAG_CACHED_MAPPED)) { case 0: return "UU"; case DRM_BO_FLAG_CACHED: return "CU"; case DRM_BO_FLAG_CACHED_MAPPED: return "UC"; case DRM_BO_FLAG_CACHED | DRM_BO_FLAG_CACHED_MAPPED: return "CC"; default: return NULL; } } static void intel_update_buffer_offsets (dri_bufmgr_ttm *bufmgr_ttm) { int i; for (i = 0; i < bufmgr_ttm->validate_count; i++) { dri_bo *bo = bufmgr_ttm->validate_array[i].bo; dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; struct drm_i915_op_arg *arg = &bufmgr_ttm->validate_array[i].bo_arg; struct drm_bo_arg_rep *rep = &arg->d.rep; /* Update the flags */ if (rep->bo_info.flags != bo_ttm->last_flags) { DBG("BO %s migrated: %s/%s -> %s/%s\n", bo_ttm->name, intel_get_flags_mem_type_string(bo_ttm->last_flags), intel_get_flags_caching_string(bo_ttm->last_flags), intel_get_flags_mem_type_string(rep->bo_info.flags), intel_get_flags_caching_string(rep->bo_info.flags)); bo_ttm->last_flags = rep->bo_info.flags; } /* Update the buffer offset */ if (rep->bo_info.offset != bo->offset) { DBG("BO %s migrated: 0x%08lx -> 0x%08lx\n", bo_ttm->name, bo->offset, (unsigned long)rep->bo_info.offset); bo->offset = rep->bo_info.offset; } } } /** * Update the last target offset field of relocation entries for PRESUMED_OFFSET * computation. */ static void dri_ttm_bo_post_submit(dri_bo *bo) { dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; unsigned int nr_relocs; int i; if (bo_ttm->reloc_buf_data == NULL) return; nr_relocs = bo_ttm->reloc_buf_data[0] & 0xffff; for (i = 0; i < nr_relocs; i++) { struct dri_ttm_reloc *r = &bo_ttm->relocs[i]; /* Continue walking the tree depth-first. */ dri_ttm_bo_post_submit(r->target_buf); r->last_target_offset = r->target_buf->offset; } } static void dri_ttm_post_submit(dri_bo *batch_buf, dri_fence **last_fence) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)batch_buf->bufmgr; int i; intel_update_buffer_offsets (bufmgr_ttm); dri_ttm_bo_post_submit(batch_buf); if (bufmgr_ttm->bufmgr.debug) dri_ttm_dump_validation_list(bufmgr_ttm); for (i = 0; i < bufmgr_ttm->validate_count; i++) { dri_bo *bo = bufmgr_ttm->validate_array[i].bo; dri_bo_ttm *bo_ttm = (dri_bo_ttm *)bo; /* Disconnect the buffer from the validate list */ bo_ttm->validate_index = -1; dri_bo_unreference(bo); bufmgr_ttm->validate_array[i].bo = NULL; } bufmgr_ttm->validate_count = 0; } /** * Enables unlimited caching of buffer objects for reuse. * * This is potentially very memory expensive, as the cache at each bucket * size is only bounded by how many buffers of that size we've managed to have * in flight at once. */ void intel_ttm_enable_bo_reuse(dri_bufmgr *bufmgr) { dri_bufmgr_ttm *bufmgr_ttm = (dri_bufmgr_ttm *)bufmgr; int i; for (i = 0; i < INTEL_TTM_BO_BUCKETS; i++) { bufmgr_ttm->cache_bucket[i].max_entries = -1; } } /* * */ static int dri_ttm_check_aperture_space(dri_bo *bo) { return 0; } /** * Initializes the TTM buffer manager, which uses the kernel to allocate, map, * and manage map buffer objections. * * \param fd File descriptor of the opened DRM device. * \param fence_type Driver-specific fence type used for fences with no flush. * \param fence_type_flush Driver-specific fence type used for fences with a * flush. */ dri_bufmgr * intel_bufmgr_ttm_init(int fd, unsigned int fence_type, unsigned int fence_type_flush, int batch_size) { dri_bufmgr_ttm *bufmgr_ttm; int i; bufmgr_ttm = calloc(1, sizeof(*bufmgr_ttm)); bufmgr_ttm->fd = fd; bufmgr_ttm->fence_type = fence_type; bufmgr_ttm->fence_type_flush = fence_type_flush; /* Let's go with one relocation per every 2 dwords (but round down a bit * since a power of two will mean an extra page allocation for the reloc * buffer). * * Every 4 was too few for the blender benchmark. */ bufmgr_ttm->max_relocs = batch_size / sizeof(uint32_t) / 2 - 2; bufmgr_ttm->bufmgr.bo_alloc = dri_ttm_alloc; bufmgr_ttm->bufmgr.bo_alloc_static = dri_ttm_alloc_static; bufmgr_ttm->bufmgr.bo_reference = dri_ttm_bo_reference; bufmgr_ttm->bufmgr.bo_unreference = dri_ttm_bo_unreference; bufmgr_ttm->bufmgr.bo_map = dri_ttm_bo_map; bufmgr_ttm->bufmgr.bo_unmap = dri_ttm_bo_unmap; bufmgr_ttm->bufmgr.fence_reference = dri_ttm_fence_reference; bufmgr_ttm->bufmgr.fence_unreference = dri_ttm_fence_unreference; bufmgr_ttm->bufmgr.fence_wait = dri_ttm_fence_wait; bufmgr_ttm->bufmgr.destroy = dri_bufmgr_ttm_destroy; bufmgr_ttm->bufmgr.emit_reloc = dri_ttm_emit_reloc; bufmgr_ttm->bufmgr.process_relocs = dri_ttm_process_reloc; bufmgr_ttm->bufmgr.post_submit = dri_ttm_post_submit; bufmgr_ttm->bufmgr.debug = GL_FALSE; bufmgr_ttm->bufmgr.check_aperture_space = dri_ttm_check_aperture_space; /* Initialize the linked lists for BO reuse cache. */ for (i = 0; i < INTEL_TTM_BO_BUCKETS; i++) bufmgr_ttm->cache_bucket[i].tail = &bufmgr_ttm->cache_bucket[i].head; return &bufmgr_ttm->bufmgr; }