--- /dev/null
+/**************************************************************************
+ *
+ * Copyright © 2007 Red Hat Inc.
+ * Copyright © 2007-2012 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 <thomas-at-tungstengraphics-dot-com>
+ * Keith Whitwell <keithw-at-tungstengraphics-dot-com>
+ * Eric Anholt <eric@anholt.net>
+ * Dave Airlie <airlied@linux.ie>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <xf86drm.h>
+#include <util/u_atomic.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <assert.h>
+#include <pthread.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <stdbool.h>
+
+#include "errno.h"
+#ifndef ETIME
+#define ETIME ETIMEDOUT
+#endif
+#include "common/gen_debug.h"
+#include "common/gen_device_info.h"
+#include "libdrm_macros.h"
+#include "main/macros.h"
+#include "util/macros.h"
+#include "util/hash_table.h"
+#include "util/list.h"
+#include "brw_bufmgr.h"
+#include "string.h"
+
+#include "i915_drm.h"
+
+#ifdef HAVE_VALGRIND
+#include <valgrind.h>
+#include <memcheck.h>
+#define VG(x) x
+#else
+#define VG(x)
+#endif
+
+#define memclear(s) memset(&s, 0, sizeof(s))
+
+#define FILE_DEBUG_FLAG DEBUG_BUFMGR
+
+static inline int
+atomic_add_unless(int *v, int add, int unless)
+{
+ int c, old;
+ c = p_atomic_read(v);
+ while (c != unless && (old = p_atomic_cmpxchg(v, c, c + add)) != c)
+ c = old;
+ return c == unless;
+}
+
+struct bo_cache_bucket {
+ struct list_head head;
+ unsigned long size;
+};
+
+struct brw_bufmgr {
+ int fd;
+
+ pthread_mutex_t lock;
+
+ /** Array of lists of cached gem objects of power-of-two sizes */
+ struct bo_cache_bucket cache_bucket[14 * 4];
+ int num_buckets;
+ time_t time;
+
+ struct hash_table *name_table;
+ struct hash_table *handle_table;
+
+ struct list_head vma_cache;
+ int vma_count, vma_open, vma_max;
+
+ unsigned int has_llc:1;
+ unsigned int bo_reuse:1;
+};
+
+static int bo_set_tiling_internal(struct brw_bo *bo, uint32_t tiling_mode,
+ uint32_t stride);
+
+static void bo_free(struct brw_bo *bo);
+
+static uint32_t
+key_hash_uint(const void *key)
+{
+ return _mesa_hash_data(key, 4);
+}
+
+static bool
+key_uint_equal(const void *a, const void *b)
+{
+ return *((unsigned *) a) == *((unsigned *) b);
+}
+
+static struct brw_bo *
+hash_find_bo(struct hash_table *ht, unsigned int key)
+{
+ struct hash_entry *entry = _mesa_hash_table_search(ht, &key);
+ return entry ? (struct brw_bo *) entry->data : NULL;
+}
+
+static unsigned long
+bo_tile_size(struct brw_bufmgr *bufmgr, unsigned long size,
+ uint32_t *tiling_mode)
+{
+ if (*tiling_mode == I915_TILING_NONE)
+ return size;
+
+ /* 965+ just need multiples of page size for tiling */
+ return ALIGN(size, 4096);
+}
+
+/*
+ * Round a given pitch up to the minimum required for X tiling on a
+ * given chip. We use 512 as the minimum to allow for a later tiling
+ * change.
+ */
+static unsigned long
+bo_tile_pitch(struct brw_bufmgr *bufmgr,
+ unsigned long pitch, uint32_t *tiling_mode)
+{
+ unsigned long tile_width;
+
+ /* If untiled, then just align it so that we can do rendering
+ * to it with the 3D engine.
+ */
+ if (*tiling_mode == I915_TILING_NONE)
+ return ALIGN(pitch, 64);
+
+ if (*tiling_mode == I915_TILING_X)
+ tile_width = 512;
+ else
+ tile_width = 128;
+
+ /* 965 is flexible */
+ return ALIGN(pitch, tile_width);
+}
+
+static struct bo_cache_bucket *
+bucket_for_size(struct brw_bufmgr *bufmgr, unsigned long size)
+{
+ int i;
+
+ for (i = 0; i < bufmgr->num_buckets; i++) {
+ struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
+ if (bucket->size >= size) {
+ return bucket;
+ }
+ }
+
+ return NULL;
+}
+
+inline void
+brw_bo_reference(struct brw_bo *bo)
+{
+ p_atomic_inc(&bo->refcount);
+}
+
+int
+brw_bo_busy(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_busy busy;
+ int ret;
+
+ memclear(busy);
+ busy.handle = bo->gem_handle;
+
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
+ if (ret == 0) {
+ bo->idle = !busy.busy;
+ return busy.busy;
+ } else {
+ return false;
+ }
+ return (ret == 0 && busy.busy);
+}
+
+int
+brw_bo_madvise(struct brw_bo *bo, int state)
+{
+ struct drm_i915_gem_madvise madv;
+
+ memclear(madv);
+ madv.handle = bo->gem_handle;
+ madv.madv = state;
+ madv.retained = 1;
+ drmIoctl(bo->bufmgr->fd, DRM_IOCTL_I915_GEM_MADVISE, &madv);
+
+ return madv.retained;
+}
+
+/* drop the oldest entries that have been purged by the kernel */
+static void
+brw_bo_cache_purge_bucket(struct brw_bufmgr *bufmgr,
+ struct bo_cache_bucket *bucket)
+{
+ while (!list_empty(&bucket->head)) {
+ struct brw_bo *bo;
+
+ bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
+ if (brw_bo_madvise(bo, I915_MADV_DONTNEED))
+ break;
+
+ list_del(&bo->head);
+ bo_free(bo);
+ }
+}
+
+static struct brw_bo *
+bo_alloc_internal(struct brw_bufmgr *bufmgr,
+ const char *name,
+ unsigned long size,
+ unsigned long flags,
+ uint32_t tiling_mode,
+ unsigned long stride, unsigned int alignment)
+{
+ struct brw_bo *bo;
+ unsigned int page_size = getpagesize();
+ int ret;
+ struct bo_cache_bucket *bucket;
+ bool alloc_from_cache;
+ unsigned long bo_size;
+ bool for_render = false;
+
+ if (flags & BO_ALLOC_FOR_RENDER)
+ for_render = true;
+
+ /* Round the allocated size up to a power of two number of pages. */
+ bucket = bucket_for_size(bufmgr, size);
+
+ /* If we don't have caching at this size, don't actually round the
+ * allocation up.
+ */
+ if (bucket == NULL) {
+ bo_size = size;
+ if (bo_size < page_size)
+ bo_size = page_size;
+ } else {
+ bo_size = bucket->size;
+ }
+
+ pthread_mutex_lock(&bufmgr->lock);
+ /* Get a buffer out of the cache if available */
+retry:
+ alloc_from_cache = false;
+ if (bucket != NULL && !list_empty(&bucket->head)) {
+ if (for_render) {
+ /* Allocate new render-target BOs from the tail (MRU)
+ * of the list, as it will likely be hot in the GPU
+ * cache and in the aperture for us.
+ */
+ bo = LIST_ENTRY(struct brw_bo, bucket->head.prev, head);
+ list_del(&bo->head);
+ alloc_from_cache = true;
+ bo->align = alignment;
+ } else {
+ assert(alignment == 0);
+ /* For non-render-target BOs (where we're probably
+ * going to map it first thing in order to fill it
+ * with data), check if the last BO in the cache is
+ * unbusy, and only reuse in that case. Otherwise,
+ * allocating a new buffer is probably faster than
+ * waiting for the GPU to finish.
+ */
+ bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
+ if (!brw_bo_busy(bo)) {
+ alloc_from_cache = true;
+ list_del(&bo->head);
+ }
+ }
+
+ if (alloc_from_cache) {
+ if (!brw_bo_madvise(bo, I915_MADV_WILLNEED)) {
+ bo_free(bo);
+ brw_bo_cache_purge_bucket(bufmgr, bucket);
+ goto retry;
+ }
+
+ if (bo_set_tiling_internal(bo, tiling_mode, stride)) {
+ bo_free(bo);
+ goto retry;
+ }
+ }
+ }
+
+ if (!alloc_from_cache) {
+ struct drm_i915_gem_create create;
+
+ bo = calloc(1, sizeof(*bo));
+ if (!bo)
+ goto err;
+
+ /* bo_free calls list_del() for an uninitialized
+ list (vma_list), so better set the list head here */
+ list_inithead(&bo->vma_list);
+
+ bo->size = bo_size;
+
+ memclear(create);
+ create.size = bo_size;
+
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CREATE, &create);
+ if (ret != 0) {
+ free(bo);
+ goto err;
+ }
+
+ bo->gem_handle = create.handle;
+ _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
+
+ bo->bufmgr = bufmgr;
+ bo->align = alignment;
+
+ bo->tiling_mode = I915_TILING_NONE;
+ bo->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
+ bo->stride = 0;
+
+ if (bo_set_tiling_internal(bo, tiling_mode, stride))
+ goto err_free;
+ }
+
+ bo->name = name;
+ p_atomic_set(&bo->refcount, 1);
+ bo->reusable = true;
+
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ DBG("bo_create: buf %d (%s) %ldb\n", bo->gem_handle, bo->name, size);
+
+ return bo;
+
+err_free:
+ bo_free(bo);
+err:
+ pthread_mutex_unlock(&bufmgr->lock);
+ return NULL;
+}
+
+struct brw_bo *
+brw_bo_alloc_for_render(struct brw_bufmgr *bufmgr,
+ const char *name,
+ unsigned long size, unsigned int alignment)
+{
+ return bo_alloc_internal(bufmgr, name, size, BO_ALLOC_FOR_RENDER,
+ I915_TILING_NONE, 0, alignment);
+}
+
+struct brw_bo *
+brw_bo_alloc(struct brw_bufmgr *bufmgr,
+ const char *name, unsigned long size, unsigned int alignment)
+{
+ return bo_alloc_internal(bufmgr, name, size, 0, I915_TILING_NONE, 0, 0);
+}
+
+struct brw_bo *
+brw_bo_alloc_tiled(struct brw_bufmgr *bufmgr, const char *name,
+ int x, int y, int cpp, uint32_t *tiling_mode,
+ unsigned long *pitch, unsigned long flags)
+{
+ unsigned long size, stride;
+ uint32_t tiling;
+
+ do {
+ unsigned long aligned_y, height_alignment;
+
+ tiling = *tiling_mode;
+
+ /* If we're tiled, our allocations are in 8 or 32-row blocks,
+ * so failure to align our height means that we won't allocate
+ * enough pages.
+ *
+ * If we're untiled, we still have to align to 2 rows high
+ * because the data port accesses 2x2 blocks even if the
+ * bottom row isn't to be rendered, so failure to align means
+ * we could walk off the end of the GTT and fault. This is
+ * documented on 965, and may be the case on older chipsets
+ * too so we try to be careful.
+ */
+ aligned_y = y;
+ height_alignment = 2;
+
+ if (tiling == I915_TILING_X)
+ height_alignment = 8;
+ else if (tiling == I915_TILING_Y)
+ height_alignment = 32;
+ aligned_y = ALIGN(y, height_alignment);
+
+ stride = x * cpp;
+ stride = bo_tile_pitch(bufmgr, stride, tiling_mode);
+ size = stride * aligned_y;
+ size = bo_tile_size(bufmgr, size, tiling_mode);
+ } while (*tiling_mode != tiling);
+ *pitch = stride;
+
+ if (tiling == I915_TILING_NONE)
+ stride = 0;
+
+ return bo_alloc_internal(bufmgr, name, size, flags, tiling, stride, 0);
+}
+
+/**
+ * Returns a brw_bo wrapping the given buffer object handle.
+ *
+ * This can be used when one application needs to pass a buffer object
+ * to another.
+ */
+struct brw_bo *
+brw_bo_gem_create_from_name(struct brw_bufmgr *bufmgr,
+ const char *name, unsigned int handle)
+{
+ struct brw_bo *bo;
+ int ret;
+ struct drm_gem_open open_arg;
+ struct drm_i915_gem_get_tiling get_tiling;
+
+ /* At the moment most applications only have a few named bo.
+ * For instance, in a DRI client only the render buffers passed
+ * between X and the client are named. And since X returns the
+ * alternating names for the front/back buffer a linear search
+ * provides a sufficiently fast match.
+ */
+ pthread_mutex_lock(&bufmgr->lock);
+ bo = hash_find_bo(bufmgr->name_table, handle);
+ if (bo) {
+ brw_bo_reference(bo);
+ goto out;
+ }
+
+ memclear(open_arg);
+ open_arg.name = handle;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
+ if (ret != 0) {
+ DBG("Couldn't reference %s handle 0x%08x: %s\n",
+ name, handle, strerror(errno));
+ bo = NULL;
+ goto out;
+ }
+ /* Now see if someone has used a prime handle to get this
+ * object from the kernel before by looking through the list
+ * again for a matching gem_handle
+ */
+ bo = hash_find_bo(bufmgr->handle_table, open_arg.handle);
+ if (bo) {
+ brw_bo_reference(bo);
+ goto out;
+ }
+
+ bo = calloc(1, sizeof(*bo));
+ if (!bo)
+ goto out;
+
+ p_atomic_set(&bo->refcount, 1);
+ list_inithead(&bo->vma_list);
+
+ bo->size = open_arg.size;
+ bo->offset64 = 0;
+ bo->virtual = NULL;
+ bo->bufmgr = bufmgr;
+ bo->gem_handle = open_arg.handle;
+ bo->name = name;
+ bo->global_name = handle;
+ bo->reusable = false;
+
+ _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
+ _mesa_hash_table_insert(bufmgr->name_table, &bo->global_name, bo);
+
+ memclear(get_tiling);
+ get_tiling.handle = bo->gem_handle;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling);
+ if (ret != 0)
+ goto err_unref;
+
+ bo->tiling_mode = get_tiling.tiling_mode;
+ bo->swizzle_mode = get_tiling.swizzle_mode;
+ /* XXX stride is unknown */
+ DBG("bo_create_from_handle: %d (%s)\n", handle, bo->name);
+
+out:
+ pthread_mutex_unlock(&bufmgr->lock);
+ return bo;
+
+err_unref:
+ bo_free(bo);
+ pthread_mutex_unlock(&bufmgr->lock);
+ return NULL;
+}
+
+static void
+bo_free(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_gem_close close;
+ struct hash_entry *entry;
+ int ret;
+
+ list_del(&bo->vma_list);
+ if (bo->mem_virtual) {
+ VG(VALGRIND_FREELIKE_BLOCK(bo->mem_virtual, 0));
+ drm_munmap(bo->mem_virtual, bo->size);
+ bufmgr->vma_count--;
+ }
+ if (bo->wc_virtual) {
+ VG(VALGRIND_FREELIKE_BLOCK(bo->wc_virtual, 0));
+ drm_munmap(bo->wc_virtual, bo->size);
+ bufmgr->vma_count--;
+ }
+ if (bo->gtt_virtual) {
+ drm_munmap(bo->gtt_virtual, bo->size);
+ bufmgr->vma_count--;
+ }
+
+ if (bo->global_name) {
+ entry = _mesa_hash_table_search(bufmgr->name_table, &bo->global_name);
+ _mesa_hash_table_remove(bufmgr->name_table, entry);
+ }
+ entry = _mesa_hash_table_search(bufmgr->handle_table, &bo->gem_handle);
+ _mesa_hash_table_remove(bufmgr->handle_table, entry);
+
+ /* Close this object */
+ memclear(close);
+ close.handle = bo->gem_handle;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_CLOSE, &close);
+ if (ret != 0) {
+ DBG("DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n",
+ bo->gem_handle, bo->name, strerror(errno));
+ }
+ free(bo);
+}
+
+static void
+bo_mark_mmaps_incoherent(struct brw_bo *bo)
+{
+#if HAVE_VALGRIND
+ if (bo->mem_virtual)
+ VALGRIND_MAKE_MEM_NOACCESS(bo->mem_virtual, bo->size);
+
+ if (bo->wc_virtual)
+ VALGRIND_MAKE_MEM_NOACCESS(bo->wc_virtual, bo->size);
+
+ if (bo->gtt_virtual)
+ VALGRIND_MAKE_MEM_NOACCESS(bo->gtt_virtual, bo->size);
+#endif
+}
+
+/** Frees all cached buffers significantly older than @time. */
+static void
+cleanup_bo_cache(struct brw_bufmgr *bufmgr, time_t time)
+{
+ int i;
+
+ if (bufmgr->time == time)
+ return;
+
+ for (i = 0; i < bufmgr->num_buckets; i++) {
+ struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
+
+ while (!list_empty(&bucket->head)) {
+ struct brw_bo *bo;
+
+ bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
+ if (time - bo->free_time <= 1)
+ break;
+
+ list_del(&bo->head);
+
+ bo_free(bo);
+ }
+ }
+
+ bufmgr->time = time;
+}
+
+static void
+bo_purge_vma_cache(struct brw_bufmgr *bufmgr)
+{
+ int limit;
+
+ DBG("%s: cached=%d, open=%d, limit=%d\n", __FUNCTION__,
+ bufmgr->vma_count, bufmgr->vma_open, bufmgr->vma_max);
+
+ if (bufmgr->vma_max < 0)
+ return;
+
+ /* We may need to evict a few entries in order to create new mmaps */
+ limit = bufmgr->vma_max - 2 * bufmgr->vma_open;
+ if (limit < 0)
+ limit = 0;
+
+ while (bufmgr->vma_count > limit) {
+ struct brw_bo *bo;
+
+ bo = LIST_ENTRY(struct brw_bo, bufmgr->vma_cache.next, vma_list);
+ assert(bo->map_count == 0);
+ list_delinit(&bo->vma_list);
+
+ if (bo->mem_virtual) {
+ drm_munmap(bo->mem_virtual, bo->size);
+ bo->mem_virtual = NULL;
+ bufmgr->vma_count--;
+ }
+ if (bo->wc_virtual) {
+ drm_munmap(bo->wc_virtual, bo->size);
+ bo->wc_virtual = NULL;
+ bufmgr->vma_count--;
+ }
+ if (bo->gtt_virtual) {
+ drm_munmap(bo->gtt_virtual, bo->size);
+ bo->gtt_virtual = NULL;
+ bufmgr->vma_count--;
+ }
+ }
+}
+
+static void
+bo_close_vma(struct brw_bufmgr *bufmgr, struct brw_bo *bo)
+{
+ bufmgr->vma_open--;
+ list_addtail(&bo->vma_list, &bufmgr->vma_cache);
+ if (bo->mem_virtual)
+ bufmgr->vma_count++;
+ if (bo->wc_virtual)
+ bufmgr->vma_count++;
+ if (bo->gtt_virtual)
+ bufmgr->vma_count++;
+ bo_purge_vma_cache(bufmgr);
+}
+
+static void
+bo_open_vma(struct brw_bufmgr *bufmgr, struct brw_bo *bo)
+{
+ bufmgr->vma_open++;
+ list_del(&bo->vma_list);
+ if (bo->mem_virtual)
+ bufmgr->vma_count--;
+ if (bo->wc_virtual)
+ bufmgr->vma_count--;
+ if (bo->gtt_virtual)
+ bufmgr->vma_count--;
+ bo_purge_vma_cache(bufmgr);
+}
+
+static void
+bo_unreference_final(struct brw_bo *bo, time_t time)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct bo_cache_bucket *bucket;
+
+ DBG("bo_unreference final: %d (%s)\n", bo->gem_handle, bo->name);
+
+ /* Clear any left-over mappings */
+ if (bo->map_count) {
+ DBG("bo freed with non-zero map-count %d\n", bo->map_count);
+ bo->map_count = 0;
+ bo_close_vma(bufmgr, bo);
+ bo_mark_mmaps_incoherent(bo);
+ }
+
+ bucket = bucket_for_size(bufmgr, bo->size);
+ /* Put the buffer into our internal cache for reuse if we can. */
+ if (bufmgr->bo_reuse && bo->reusable && bucket != NULL &&
+ brw_bo_madvise(bo, I915_MADV_DONTNEED)) {
+ bo->free_time = time;
+
+ bo->name = NULL;
+
+ list_addtail(&bo->head, &bucket->head);
+ } else {
+ bo_free(bo);
+ }
+}
+
+void
+brw_bo_unreference(struct brw_bo *bo)
+{
+ if (bo == NULL)
+ return;
+
+ assert(p_atomic_read(&bo->refcount) > 0);
+
+ if (atomic_add_unless(&bo->refcount, -1, 1)) {
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct timespec time;
+
+ clock_gettime(CLOCK_MONOTONIC, &time);
+
+ pthread_mutex_lock(&bufmgr->lock);
+
+ if (p_atomic_dec_zero(&bo->refcount)) {
+ bo_unreference_final(bo, time.tv_sec);
+ cleanup_bo_cache(bufmgr, time.tv_sec);
+ }
+
+ pthread_mutex_unlock(&bufmgr->lock);
+ }
+}
+
+int
+brw_bo_map(struct brw_bo *bo, int write_enable)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_set_domain set_domain;
+ int ret;
+
+ pthread_mutex_lock(&bufmgr->lock);
+
+ if (bo->map_count++ == 0)
+ bo_open_vma(bufmgr, bo);
+
+ if (!bo->mem_virtual) {
+ struct drm_i915_gem_mmap mmap_arg;
+
+ DBG("bo_map: %d (%s), map_count=%d\n",
+ bo->gem_handle, bo->name, bo->map_count);
+
+ memclear(mmap_arg);
+ mmap_arg.handle = bo->gem_handle;
+ mmap_arg.size = bo->size;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg);
+ if (ret != 0) {
+ ret = -errno;
+ DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ pthread_mutex_unlock(&bufmgr->lock);
+ return ret;
+ }
+ VG(VALGRIND_MALLOCLIKE_BLOCK(mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
+ bo->mem_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
+ }
+ DBG("bo_map: %d (%s) -> %p\n", bo->gem_handle, bo->name, bo->mem_virtual);
+ bo->virtual = bo->mem_virtual;
+
+ memclear(set_domain);
+ set_domain.handle = bo->gem_handle;
+ set_domain.read_domains = I915_GEM_DOMAIN_CPU;
+ if (write_enable)
+ set_domain.write_domain = I915_GEM_DOMAIN_CPU;
+ else
+ set_domain.write_domain = 0;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
+ if (ret != 0) {
+ DBG("%s:%d: Error setting to CPU domain %d: %s\n",
+ __FILE__, __LINE__, bo->gem_handle, strerror(errno));
+ }
+
+ bo_mark_mmaps_incoherent(bo);
+ VG(VALGRIND_MAKE_MEM_DEFINED(bo->mem_virtual, bo->size));
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return 0;
+}
+
+static int
+map_gtt(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ int ret;
+
+ if (bo->map_count++ == 0)
+ bo_open_vma(bufmgr, bo);
+
+ /* Get a mapping of the buffer if we haven't before. */
+ if (bo->gtt_virtual == NULL) {
+ struct drm_i915_gem_mmap_gtt mmap_arg;
+
+ DBG("bo_map_gtt: mmap %d (%s), map_count=%d\n",
+ bo->gem_handle, bo->name, bo->map_count);
+
+ memclear(mmap_arg);
+ mmap_arg.handle = bo->gem_handle;
+
+ /* Get the fake offset back... */
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg);
+ if (ret != 0) {
+ ret = -errno;
+ DBG("%s:%d: Error preparing buffer map %d (%s): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ return ret;
+ }
+
+ /* and mmap it */
+ bo->gtt_virtual = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
+ MAP_SHARED, bufmgr->fd, mmap_arg.offset);
+ if (bo->gtt_virtual == MAP_FAILED) {
+ bo->gtt_virtual = NULL;
+ ret = -errno;
+ DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ return ret;
+ }
+ }
+
+ bo->virtual = bo->gtt_virtual;
+
+ DBG("bo_map_gtt: %d (%s) -> %p\n", bo->gem_handle, bo->name,
+ bo->gtt_virtual);
+
+ return 0;
+}
+
+int
+brw_bo_map_gtt(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_set_domain set_domain;
+ int ret;
+
+ pthread_mutex_lock(&bufmgr->lock);
+
+ ret = map_gtt(bo);
+ if (ret) {
+ pthread_mutex_unlock(&bufmgr->lock);
+ return ret;
+ }
+
+ /* Now move it to the GTT domain so that the GPU and CPU
+ * caches are flushed and the GPU isn't actively using the
+ * buffer.
+ *
+ * The pagefault handler does this domain change for us when
+ * it has unbound the BO from the GTT, but it's up to us to
+ * tell it when we're about to use things if we had done
+ * rendering and it still happens to be bound to the GTT.
+ */
+ memclear(set_domain);
+ set_domain.handle = bo->gem_handle;
+ set_domain.read_domains = I915_GEM_DOMAIN_GTT;
+ set_domain.write_domain = I915_GEM_DOMAIN_GTT;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
+ if (ret != 0) {
+ DBG("%s:%d: Error setting domain %d: %s\n",
+ __FILE__, __LINE__, bo->gem_handle, strerror(errno));
+ }
+
+ bo_mark_mmaps_incoherent(bo);
+ VG(VALGRIND_MAKE_MEM_DEFINED(bo->gtt_virtual, bo->size));
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return 0;
+}
+
+/**
+ * Performs a mapping of the buffer object like the normal GTT
+ * mapping, but avoids waiting for the GPU to be done reading from or
+ * rendering to the buffer.
+ *
+ * This is used in the implementation of GL_ARB_map_buffer_range: The
+ * user asks to create a buffer, then does a mapping, fills some
+ * space, runs a drawing command, then asks to map it again without
+ * synchronizing because it guarantees that it won't write over the
+ * data that the GPU is busy using (or, more specifically, that if it
+ * does write over the data, it acknowledges that rendering is
+ * undefined).
+ */
+
+int
+brw_bo_map_unsynchronized(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ int ret;
+
+ /* If the CPU cache isn't coherent with the GTT, then use a
+ * regular synchronized mapping. The problem is that we don't
+ * track where the buffer was last used on the CPU side in
+ * terms of brw_bo_map vs brw_bo_map_gtt, so
+ * we would potentially corrupt the buffer even when the user
+ * does reasonable things.
+ */
+ if (!bufmgr->has_llc)
+ return brw_bo_map_gtt(bo);
+
+ pthread_mutex_lock(&bufmgr->lock);
+
+ ret = map_gtt(bo);
+ if (ret == 0) {
+ bo_mark_mmaps_incoherent(bo);
+ VG(VALGRIND_MAKE_MEM_DEFINED(bo->gtt_virtual, bo->size));
+ }
+
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return ret;
+}
+
+int
+brw_bo_unmap(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ int ret = 0;
+
+ if (bo == NULL)
+ return 0;
+
+ pthread_mutex_lock(&bufmgr->lock);
+
+ if (bo->map_count <= 0) {
+ DBG("attempted to unmap an unmapped bo\n");
+ pthread_mutex_unlock(&bufmgr->lock);
+ /* Preserve the old behaviour of just treating this as a
+ * no-op rather than reporting the error.
+ */
+ return 0;
+ }
+
+ /* We need to unmap after every innovation as we cannot track
+ * an open vma for every bo as that will exhaust the system
+ * limits and cause later failures.
+ */
+ if (--bo->map_count == 0) {
+ bo_close_vma(bufmgr, bo);
+ bo_mark_mmaps_incoherent(bo);
+ bo->virtual = NULL;
+ }
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return ret;
+}
+
+int
+brw_bo_subdata(struct brw_bo *bo, unsigned long offset,
+ unsigned long size, const void *data)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_pwrite pwrite;
+ int ret;
+
+ memclear(pwrite);
+ pwrite.handle = bo->gem_handle;
+ pwrite.offset = offset;
+ pwrite.size = size;
+ pwrite.data_ptr = (uint64_t) (uintptr_t) data;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite);
+ if (ret != 0) {
+ ret = -errno;
+ DBG("%s:%d: Error writing data to buffer %d: (%d %d) %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, (int) offset,
+ (int) size, strerror(errno));
+ }
+
+ return ret;
+}
+
+int
+brw_bo_get_subdata(struct brw_bo *bo, unsigned long offset,
+ unsigned long size, void *data)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_pread pread;
+ int ret;
+
+ memclear(pread);
+ pread.handle = bo->gem_handle;
+ pread.offset = offset;
+ pread.size = size;
+ pread.data_ptr = (uint64_t) (uintptr_t) data;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_PREAD, &pread);
+ if (ret != 0) {
+ ret = -errno;
+ DBG("%s:%d: Error reading data from buffer %d: (%d %d) %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, (int) offset,
+ (int) size, strerror(errno));
+ }
+
+ return ret;
+}
+
+/** Waits for all GPU rendering with the object to have completed. */
+void
+brw_bo_wait_rendering(struct brw_bo *bo)
+{
+ brw_bo_start_gtt_access(bo, 1);
+}
+
+/**
+ * Waits on a BO for the given amount of time.
+ *
+ * @bo: buffer object to wait for
+ * @timeout_ns: amount of time to wait in nanoseconds.
+ * If value is less than 0, an infinite wait will occur.
+ *
+ * Returns 0 if the wait was successful ie. the last batch referencing the
+ * object has completed within the allotted time. Otherwise some negative return
+ * value describes the error. Of particular interest is -ETIME when the wait has
+ * failed to yield the desired result.
+ *
+ * Similar to brw_bo_wait_rendering except a timeout parameter allows
+ * the operation to give up after a certain amount of time. Another subtle
+ * difference is the internal locking semantics are different (this variant does
+ * not hold the lock for the duration of the wait). This makes the wait subject
+ * to a larger userspace race window.
+ *
+ * The implementation shall wait until the object is no longer actively
+ * referenced within a batch buffer at the time of the call. The wait will
+ * not guarantee that the buffer is re-issued via another thread, or an flinked
+ * handle. Userspace must make sure this race does not occur if such precision
+ * is important.
+ *
+ * Note that some kernels have broken the inifite wait for negative values
+ * promise, upgrade to latest stable kernels if this is the case.
+ */
+int
+brw_bo_wait(struct brw_bo *bo, int64_t timeout_ns)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_wait wait;
+ int ret;
+
+ memclear(wait);
+ wait.bo_handle = bo->gem_handle;
+ wait.timeout_ns = timeout_ns;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
+ if (ret == -1)
+ return -errno;
+
+ return ret;
+}
+
+/**
+ * Sets the object to the GTT read and possibly write domain, used by the X
+ * 2D driver in the absence of kernel support to do brw_bo_map_gtt().
+ *
+ * In combination with brw_bo_pin() and manual fence management, we
+ * can do tiled pixmaps this way.
+ */
+void
+brw_bo_start_gtt_access(struct brw_bo *bo, int write_enable)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_set_domain set_domain;
+ int ret;
+
+ memclear(set_domain);
+ set_domain.handle = bo->gem_handle;
+ set_domain.read_domains = I915_GEM_DOMAIN_GTT;
+ set_domain.write_domain = write_enable ? I915_GEM_DOMAIN_GTT : 0;
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
+ if (ret != 0) {
+ DBG("%s:%d: Error setting memory domains %d (%08x %08x): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle,
+ set_domain.read_domains, set_domain.write_domain, strerror(errno));
+ }
+}
+
+void
+brw_bufmgr_destroy(struct brw_bufmgr *bufmgr)
+{
+ pthread_mutex_destroy(&bufmgr->lock);
+
+ /* Free any cached buffer objects we were going to reuse */
+ for (int i = 0; i < bufmgr->num_buckets; i++) {
+ struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
+ struct brw_bo *bo;
+
+ while (!list_empty(&bucket->head)) {
+ bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
+ list_del(&bo->head);
+
+ bo_free(bo);
+ }
+ }
+
+ _mesa_hash_table_destroy(bufmgr->name_table, NULL);
+ _mesa_hash_table_destroy(bufmgr->handle_table, NULL);
+
+ free(bufmgr);
+}
+
+static int
+bo_set_tiling_internal(struct brw_bo *bo, uint32_t tiling_mode,
+ uint32_t stride)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+ struct drm_i915_gem_set_tiling set_tiling;
+ int ret;
+
+ if (bo->global_name == 0 &&
+ tiling_mode == bo->tiling_mode && stride == bo->stride)
+ return 0;
+
+ memset(&set_tiling, 0, sizeof(set_tiling));
+ do {
+ /* set_tiling is slightly broken and overwrites the
+ * input on the error path, so we have to open code
+ * rmIoctl.
+ */
+ set_tiling.handle = bo->gem_handle;
+ set_tiling.tiling_mode = tiling_mode;
+ set_tiling.stride = stride;
+
+ ret = ioctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
+ } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+ if (ret == -1)
+ return -errno;
+
+ bo->tiling_mode = set_tiling.tiling_mode;
+ bo->swizzle_mode = set_tiling.swizzle_mode;
+ bo->stride = set_tiling.stride;
+ return 0;
+}
+
+int
+brw_bo_set_tiling(struct brw_bo *bo, uint32_t *tiling_mode, uint32_t stride)
+{
+ int ret;
+
+ /* Linear buffers have no stride. By ensuring that we only ever use
+ * stride 0 with linear buffers, we simplify our code.
+ */
+ if (*tiling_mode == I915_TILING_NONE)
+ stride = 0;
+
+ ret = bo_set_tiling_internal(bo, *tiling_mode, stride);
+
+ *tiling_mode = bo->tiling_mode;
+ return ret;
+}
+
+int
+brw_bo_get_tiling(struct brw_bo *bo, uint32_t *tiling_mode,
+ uint32_t *swizzle_mode)
+{
+ *tiling_mode = bo->tiling_mode;
+ *swizzle_mode = bo->swizzle_mode;
+ return 0;
+}
+
+struct brw_bo *
+brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, int prime_fd,
+ int size)
+{
+ int ret;
+ uint32_t handle;
+ struct brw_bo *bo;
+ struct drm_i915_gem_get_tiling get_tiling;
+
+ pthread_mutex_lock(&bufmgr->lock);
+ ret = drmPrimeFDToHandle(bufmgr->fd, prime_fd, &handle);
+ if (ret) {
+ DBG("create_from_prime: failed to obtain handle from fd: %s\n",
+ strerror(errno));
+ pthread_mutex_unlock(&bufmgr->lock);
+ return NULL;
+ }
+
+ /*
+ * See if the kernel has already returned this buffer to us. Just as
+ * for named buffers, we must not create two bo's pointing at the same
+ * kernel object
+ */
+ bo = hash_find_bo(bufmgr->handle_table, handle);
+ if (bo) {
+ brw_bo_reference(bo);
+ goto out;
+ }
+
+ bo = calloc(1, sizeof(*bo));
+ if (!bo)
+ goto out;
+
+ p_atomic_set(&bo->refcount, 1);
+ list_inithead(&bo->vma_list);
+
+ /* Determine size of bo. The fd-to-handle ioctl really should
+ * return the size, but it doesn't. If we have kernel 3.12 or
+ * later, we can lseek on the prime fd to get the size. Older
+ * kernels will just fail, in which case we fall back to the
+ * provided (estimated or guess size). */
+ ret = lseek(prime_fd, 0, SEEK_END);
+ if (ret != -1)
+ bo->size = ret;
+ else
+ bo->size = size;
+
+ bo->bufmgr = bufmgr;
+
+ bo->gem_handle = handle;
+ _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
+
+ bo->name = "prime";
+ bo->reusable = false;
+
+ memclear(get_tiling);
+ get_tiling.handle = bo->gem_handle;
+ if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling))
+ goto err;
+
+ bo->tiling_mode = get_tiling.tiling_mode;
+ bo->swizzle_mode = get_tiling.swizzle_mode;
+ /* XXX stride is unknown */
+
+out:
+ pthread_mutex_unlock(&bufmgr->lock);
+ return bo;
+
+err:
+ bo_free(bo);
+ pthread_mutex_unlock(&bufmgr->lock);
+ return NULL;
+}
+
+int
+brw_bo_gem_export_to_prime(struct brw_bo *bo, int *prime_fd)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ if (drmPrimeHandleToFD(bufmgr->fd, bo->gem_handle,
+ DRM_CLOEXEC, prime_fd) != 0)
+ return -errno;
+
+ bo->reusable = false;
+
+ return 0;
+}
+
+int
+brw_bo_flink(struct brw_bo *bo, uint32_t *name)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ if (!bo->global_name) {
+ struct drm_gem_flink flink;
+
+ memclear(flink);
+ flink.handle = bo->gem_handle;
+ if (drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_FLINK, &flink))
+ return -errno;
+
+ pthread_mutex_lock(&bufmgr->lock);
+ if (!bo->global_name) {
+ bo->global_name = flink.name;
+ bo->reusable = false;
+
+ _mesa_hash_table_insert(bufmgr->name_table, &bo->global_name, bo);
+ }
+ pthread_mutex_unlock(&bufmgr->lock);
+ }
+
+ *name = bo->global_name;
+ return 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
+brw_bufmgr_enable_reuse(struct brw_bufmgr *bufmgr)
+{
+ bufmgr->bo_reuse = true;
+}
+
+/*
+ * Disable buffer reuse for objects which are shared with the kernel
+ * as scanout buffers
+ */
+int
+brw_bo_disable_reuse(struct brw_bo *bo)
+{
+ bo->reusable = false;
+ return 0;
+}
+
+int
+brw_bo_is_reusable(struct brw_bo *bo)
+{
+ return bo->reusable;
+}
+
+static void
+add_bucket(struct brw_bufmgr *bufmgr, int size)
+{
+ unsigned int i = bufmgr->num_buckets;
+
+ assert(i < ARRAY_SIZE(bufmgr->cache_bucket));
+
+ list_inithead(&bufmgr->cache_bucket[i].head);
+ bufmgr->cache_bucket[i].size = size;
+ bufmgr->num_buckets++;
+}
+
+static void
+init_cache_buckets(struct brw_bufmgr *bufmgr)
+{
+ unsigned long size, cache_max_size = 64 * 1024 * 1024;
+
+ /* OK, so power of two buckets was too wasteful of memory.
+ * Give 3 other sizes between each power of two, to hopefully
+ * cover things accurately enough. (The alternative is
+ * probably to just go for exact matching of sizes, and assume
+ * that for things like composited window resize the tiled
+ * width/height alignment and rounding of sizes to pages will
+ * get us useful cache hit rates anyway)
+ */
+ add_bucket(bufmgr, 4096);
+ add_bucket(bufmgr, 4096 * 2);
+ add_bucket(bufmgr, 4096 * 3);
+
+ /* Initialize the linked lists for BO reuse cache. */
+ for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
+ add_bucket(bufmgr, size);
+
+ add_bucket(bufmgr, size + size * 1 / 4);
+ add_bucket(bufmgr, size + size * 2 / 4);
+ add_bucket(bufmgr, size + size * 3 / 4);
+ }
+}
+
+void
+brw_bufmgr_gem_set_vma_cache_size(struct brw_bufmgr *bufmgr, int limit)
+{
+ bufmgr->vma_max = limit;
+
+ bo_purge_vma_cache(bufmgr);
+}
+
+uint32_t
+brw_create_hw_context(struct brw_bufmgr *bufmgr)
+{
+ struct drm_i915_gem_context_create create;
+ int ret;
+
+ memclear(create);
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
+ if (ret != 0) {
+ DBG("DRM_IOCTL_I915_GEM_CONTEXT_CREATE failed: %s\n", strerror(errno));
+ return 0;
+ }
+
+ return create.ctx_id;
+}
+
+void
+brw_destroy_hw_context(struct brw_bufmgr *bufmgr, uint32_t ctx_id)
+{
+ struct drm_i915_gem_context_destroy d = {.ctx_id = ctx_id };
+
+ if (ctx_id != 0 &&
+ drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &d) != 0) {
+ fprintf(stderr, "DRM_IOCTL_I915_GEM_CONTEXT_DESTROY failed: %s\n",
+ strerror(errno));
+ }
+}
+
+int
+brw_reg_read(struct brw_bufmgr *bufmgr, uint32_t offset, uint64_t *result)
+{
+ struct drm_i915_reg_read reg_read;
+ int ret;
+
+ memclear(reg_read);
+ reg_read.offset = offset;
+
+ ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_REG_READ, ®_read);
+
+ *result = reg_read.val;
+ return ret;
+}
+
+void *
+brw_bo_map__gtt(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ if (bo->gtt_virtual)
+ return bo->gtt_virtual;
+
+ pthread_mutex_lock(&bufmgr->lock);
+ if (bo->gtt_virtual == NULL) {
+ struct drm_i915_gem_mmap_gtt mmap_arg;
+ void *ptr;
+
+ DBG("bo_map_gtt: mmap %d (%s), map_count=%d\n",
+ bo->gem_handle, bo->name, bo->map_count);
+
+ if (bo->map_count++ == 0)
+ bo_open_vma(bufmgr, bo);
+
+ memclear(mmap_arg);
+ mmap_arg.handle = bo->gem_handle;
+
+ /* Get the fake offset back... */
+ ptr = MAP_FAILED;
+ if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg) == 0) {
+ /* and mmap it */
+ ptr = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
+ MAP_SHARED, bufmgr->fd, mmap_arg.offset);
+ }
+ if (ptr == MAP_FAILED) {
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ ptr = NULL;
+ }
+
+ bo->gtt_virtual = ptr;
+ }
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return bo->gtt_virtual;
+}
+
+void *
+brw_bo_map__cpu(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ if (bo->mem_virtual)
+ return bo->mem_virtual;
+
+ pthread_mutex_lock(&bufmgr->lock);
+ if (!bo->mem_virtual) {
+ struct drm_i915_gem_mmap mmap_arg;
+
+ if (bo->map_count++ == 0)
+ bo_open_vma(bufmgr, bo);
+
+ DBG("bo_map: %d (%s), map_count=%d\n",
+ bo->gem_handle, bo->name, bo->map_count);
+
+ memclear(mmap_arg);
+ mmap_arg.handle = bo->gem_handle;
+ mmap_arg.size = bo->size;
+ if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) {
+ DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ } else {
+ VG(VALGRIND_MALLOCLIKE_BLOCK
+ (mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
+ bo->mem_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
+ }
+ }
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return bo->mem_virtual;
+}
+
+void *
+brw_bo_map__wc(struct brw_bo *bo)
+{
+ struct brw_bufmgr *bufmgr = bo->bufmgr;
+
+ if (bo->wc_virtual)
+ return bo->wc_virtual;
+
+ pthread_mutex_lock(&bufmgr->lock);
+ if (!bo->wc_virtual) {
+ struct drm_i915_gem_mmap mmap_arg;
+
+ if (bo->map_count++ == 0)
+ bo_open_vma(bufmgr, bo);
+
+ DBG("bo_map: %d (%s), map_count=%d\n",
+ bo->gem_handle, bo->name, bo->map_count);
+
+ memclear(mmap_arg);
+ mmap_arg.handle = bo->gem_handle;
+ mmap_arg.size = bo->size;
+ mmap_arg.flags = I915_MMAP_WC;
+ if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) {
+ DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
+ __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
+ if (--bo->map_count == 0)
+ bo_close_vma(bufmgr, bo);
+ } else {
+ VG(VALGRIND_MALLOCLIKE_BLOCK
+ (mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
+ bo->wc_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
+ }
+ }
+ pthread_mutex_unlock(&bufmgr->lock);
+
+ return bo->wc_virtual;
+}
+
+/**
+ * Initializes the GEM buffer manager, which uses the kernel to allocate, map,
+ * and manage map buffer objections.
+ *
+ * \param fd File descriptor of the opened DRM device.
+ */
+struct brw_bufmgr *
+brw_bufmgr_init(struct gen_device_info *devinfo, int fd, int batch_size)
+{
+ struct brw_bufmgr *bufmgr;
+
+ bufmgr = calloc(1, sizeof(*bufmgr));
+ if (bufmgr == NULL)
+ return NULL;
+
+ /* Handles to buffer objects belong to the device fd and are not
+ * reference counted by the kernel. If the same fd is used by
+ * multiple parties (threads sharing the same screen bufmgr, or
+ * even worse the same device fd passed to multiple libraries)
+ * ownership of those handles is shared by those independent parties.
+ *
+ * Don't do this! Ensure that each library/bufmgr has its own device
+ * fd so that its namespace does not clash with another.
+ */
+ bufmgr->fd = fd;
+
+ if (pthread_mutex_init(&bufmgr->lock, NULL) != 0) {
+ free(bufmgr);
+ return NULL;
+ }
+
+ bufmgr->has_llc = devinfo->has_llc;
+
+ init_cache_buckets(bufmgr);
+
+ list_inithead(&bufmgr->vma_cache);
+ bufmgr->vma_max = -1; /* unlimited by default */
+
+ bufmgr->name_table =
+ _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
+ bufmgr->handle_table =
+ _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
+
+ return bufmgr;
+}
+++ /dev/null
-/**************************************************************************
- *
- * Copyright © 2007 Red Hat Inc.
- * Copyright © 2007-2012 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 <thomas-at-tungstengraphics-dot-com>
- * Keith Whitwell <keithw-at-tungstengraphics-dot-com>
- * Eric Anholt <eric@anholt.net>
- * Dave Airlie <airlied@linux.ie>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <xf86drm.h>
-#include <util/u_atomic.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <assert.h>
-#include <pthread.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <stdbool.h>
-
-#include "errno.h"
-#ifndef ETIME
-#define ETIME ETIMEDOUT
-#endif
-#include "common/gen_debug.h"
-#include "common/gen_device_info.h"
-#include "libdrm_macros.h"
-#include "main/macros.h"
-#include "util/macros.h"
-#include "util/hash_table.h"
-#include "util/list.h"
-#include "brw_bufmgr.h"
-#include "string.h"
-
-#include "i915_drm.h"
-
-#ifdef HAVE_VALGRIND
-#include <valgrind.h>
-#include <memcheck.h>
-#define VG(x) x
-#else
-#define VG(x)
-#endif
-
-#define memclear(s) memset(&s, 0, sizeof(s))
-
-#define FILE_DEBUG_FLAG DEBUG_BUFMGR
-
-static inline int
-atomic_add_unless(int *v, int add, int unless)
-{
- int c, old;
- c = p_atomic_read(v);
- while (c != unless && (old = p_atomic_cmpxchg(v, c, c + add)) != c)
- c = old;
- return c == unless;
-}
-
-struct bo_cache_bucket {
- struct list_head head;
- unsigned long size;
-};
-
-struct brw_bufmgr {
- int fd;
-
- pthread_mutex_t lock;
-
- /** Array of lists of cached gem objects of power-of-two sizes */
- struct bo_cache_bucket cache_bucket[14 * 4];
- int num_buckets;
- time_t time;
-
- struct hash_table *name_table;
- struct hash_table *handle_table;
-
- struct list_head vma_cache;
- int vma_count, vma_open, vma_max;
-
- unsigned int has_llc:1;
- unsigned int bo_reuse:1;
-};
-
-static int bo_set_tiling_internal(struct brw_bo *bo, uint32_t tiling_mode,
- uint32_t stride);
-
-static void bo_free(struct brw_bo *bo);
-
-static uint32_t
-key_hash_uint(const void *key)
-{
- return _mesa_hash_data(key, 4);
-}
-
-static bool
-key_uint_equal(const void *a, const void *b)
-{
- return *((unsigned *) a) == *((unsigned *) b);
-}
-
-static struct brw_bo *
-hash_find_bo(struct hash_table *ht, unsigned int key)
-{
- struct hash_entry *entry = _mesa_hash_table_search(ht, &key);
- return entry ? (struct brw_bo *) entry->data : NULL;
-}
-
-static unsigned long
-bo_tile_size(struct brw_bufmgr *bufmgr, unsigned long size,
- uint32_t *tiling_mode)
-{
- if (*tiling_mode == I915_TILING_NONE)
- return size;
-
- /* 965+ just need multiples of page size for tiling */
- return ALIGN(size, 4096);
-}
-
-/*
- * Round a given pitch up to the minimum required for X tiling on a
- * given chip. We use 512 as the minimum to allow for a later tiling
- * change.
- */
-static unsigned long
-bo_tile_pitch(struct brw_bufmgr *bufmgr,
- unsigned long pitch, uint32_t *tiling_mode)
-{
- unsigned long tile_width;
-
- /* If untiled, then just align it so that we can do rendering
- * to it with the 3D engine.
- */
- if (*tiling_mode == I915_TILING_NONE)
- return ALIGN(pitch, 64);
-
- if (*tiling_mode == I915_TILING_X)
- tile_width = 512;
- else
- tile_width = 128;
-
- /* 965 is flexible */
- return ALIGN(pitch, tile_width);
-}
-
-static struct bo_cache_bucket *
-bucket_for_size(struct brw_bufmgr *bufmgr, unsigned long size)
-{
- int i;
-
- for (i = 0; i < bufmgr->num_buckets; i++) {
- struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
- if (bucket->size >= size) {
- return bucket;
- }
- }
-
- return NULL;
-}
-
-inline void
-brw_bo_reference(struct brw_bo *bo)
-{
- p_atomic_inc(&bo->refcount);
-}
-
-int
-brw_bo_busy(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_busy busy;
- int ret;
-
- memclear(busy);
- busy.handle = bo->gem_handle;
-
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
- if (ret == 0) {
- bo->idle = !busy.busy;
- return busy.busy;
- } else {
- return false;
- }
- return (ret == 0 && busy.busy);
-}
-
-int
-brw_bo_madvise(struct brw_bo *bo, int state)
-{
- struct drm_i915_gem_madvise madv;
-
- memclear(madv);
- madv.handle = bo->gem_handle;
- madv.madv = state;
- madv.retained = 1;
- drmIoctl(bo->bufmgr->fd, DRM_IOCTL_I915_GEM_MADVISE, &madv);
-
- return madv.retained;
-}
-
-/* drop the oldest entries that have been purged by the kernel */
-static void
-brw_bo_cache_purge_bucket(struct brw_bufmgr *bufmgr,
- struct bo_cache_bucket *bucket)
-{
- while (!list_empty(&bucket->head)) {
- struct brw_bo *bo;
-
- bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
- if (brw_bo_madvise(bo, I915_MADV_DONTNEED))
- break;
-
- list_del(&bo->head);
- bo_free(bo);
- }
-}
-
-static struct brw_bo *
-bo_alloc_internal(struct brw_bufmgr *bufmgr,
- const char *name,
- unsigned long size,
- unsigned long flags,
- uint32_t tiling_mode,
- unsigned long stride, unsigned int alignment)
-{
- struct brw_bo *bo;
- unsigned int page_size = getpagesize();
- int ret;
- struct bo_cache_bucket *bucket;
- bool alloc_from_cache;
- unsigned long bo_size;
- bool for_render = false;
-
- if (flags & BO_ALLOC_FOR_RENDER)
- for_render = true;
-
- /* Round the allocated size up to a power of two number of pages. */
- bucket = bucket_for_size(bufmgr, size);
-
- /* If we don't have caching at this size, don't actually round the
- * allocation up.
- */
- if (bucket == NULL) {
- bo_size = size;
- if (bo_size < page_size)
- bo_size = page_size;
- } else {
- bo_size = bucket->size;
- }
-
- pthread_mutex_lock(&bufmgr->lock);
- /* Get a buffer out of the cache if available */
-retry:
- alloc_from_cache = false;
- if (bucket != NULL && !list_empty(&bucket->head)) {
- if (for_render) {
- /* Allocate new render-target BOs from the tail (MRU)
- * of the list, as it will likely be hot in the GPU
- * cache and in the aperture for us.
- */
- bo = LIST_ENTRY(struct brw_bo, bucket->head.prev, head);
- list_del(&bo->head);
- alloc_from_cache = true;
- bo->align = alignment;
- } else {
- assert(alignment == 0);
- /* For non-render-target BOs (where we're probably
- * going to map it first thing in order to fill it
- * with data), check if the last BO in the cache is
- * unbusy, and only reuse in that case. Otherwise,
- * allocating a new buffer is probably faster than
- * waiting for the GPU to finish.
- */
- bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
- if (!brw_bo_busy(bo)) {
- alloc_from_cache = true;
- list_del(&bo->head);
- }
- }
-
- if (alloc_from_cache) {
- if (!brw_bo_madvise(bo, I915_MADV_WILLNEED)) {
- bo_free(bo);
- brw_bo_cache_purge_bucket(bufmgr, bucket);
- goto retry;
- }
-
- if (bo_set_tiling_internal(bo, tiling_mode, stride)) {
- bo_free(bo);
- goto retry;
- }
- }
- }
-
- if (!alloc_from_cache) {
- struct drm_i915_gem_create create;
-
- bo = calloc(1, sizeof(*bo));
- if (!bo)
- goto err;
-
- /* bo_free calls list_del() for an uninitialized
- list (vma_list), so better set the list head here */
- list_inithead(&bo->vma_list);
-
- bo->size = bo_size;
-
- memclear(create);
- create.size = bo_size;
-
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CREATE, &create);
- if (ret != 0) {
- free(bo);
- goto err;
- }
-
- bo->gem_handle = create.handle;
- _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
-
- bo->bufmgr = bufmgr;
- bo->align = alignment;
-
- bo->tiling_mode = I915_TILING_NONE;
- bo->swizzle_mode = I915_BIT_6_SWIZZLE_NONE;
- bo->stride = 0;
-
- if (bo_set_tiling_internal(bo, tiling_mode, stride))
- goto err_free;
- }
-
- bo->name = name;
- p_atomic_set(&bo->refcount, 1);
- bo->reusable = true;
-
- pthread_mutex_unlock(&bufmgr->lock);
-
- DBG("bo_create: buf %d (%s) %ldb\n", bo->gem_handle, bo->name, size);
-
- return bo;
-
-err_free:
- bo_free(bo);
-err:
- pthread_mutex_unlock(&bufmgr->lock);
- return NULL;
-}
-
-struct brw_bo *
-brw_bo_alloc_for_render(struct brw_bufmgr *bufmgr,
- const char *name,
- unsigned long size, unsigned int alignment)
-{
- return bo_alloc_internal(bufmgr, name, size, BO_ALLOC_FOR_RENDER,
- I915_TILING_NONE, 0, alignment);
-}
-
-struct brw_bo *
-brw_bo_alloc(struct brw_bufmgr *bufmgr,
- const char *name, unsigned long size, unsigned int alignment)
-{
- return bo_alloc_internal(bufmgr, name, size, 0, I915_TILING_NONE, 0, 0);
-}
-
-struct brw_bo *
-brw_bo_alloc_tiled(struct brw_bufmgr *bufmgr, const char *name,
- int x, int y, int cpp, uint32_t *tiling_mode,
- unsigned long *pitch, unsigned long flags)
-{
- unsigned long size, stride;
- uint32_t tiling;
-
- do {
- unsigned long aligned_y, height_alignment;
-
- tiling = *tiling_mode;
-
- /* If we're tiled, our allocations are in 8 or 32-row blocks,
- * so failure to align our height means that we won't allocate
- * enough pages.
- *
- * If we're untiled, we still have to align to 2 rows high
- * because the data port accesses 2x2 blocks even if the
- * bottom row isn't to be rendered, so failure to align means
- * we could walk off the end of the GTT and fault. This is
- * documented on 965, and may be the case on older chipsets
- * too so we try to be careful.
- */
- aligned_y = y;
- height_alignment = 2;
-
- if (tiling == I915_TILING_X)
- height_alignment = 8;
- else if (tiling == I915_TILING_Y)
- height_alignment = 32;
- aligned_y = ALIGN(y, height_alignment);
-
- stride = x * cpp;
- stride = bo_tile_pitch(bufmgr, stride, tiling_mode);
- size = stride * aligned_y;
- size = bo_tile_size(bufmgr, size, tiling_mode);
- } while (*tiling_mode != tiling);
- *pitch = stride;
-
- if (tiling == I915_TILING_NONE)
- stride = 0;
-
- return bo_alloc_internal(bufmgr, name, size, flags, tiling, stride, 0);
-}
-
-/**
- * Returns a brw_bo wrapping the given buffer object handle.
- *
- * This can be used when one application needs to pass a buffer object
- * to another.
- */
-struct brw_bo *
-brw_bo_gem_create_from_name(struct brw_bufmgr *bufmgr,
- const char *name, unsigned int handle)
-{
- struct brw_bo *bo;
- int ret;
- struct drm_gem_open open_arg;
- struct drm_i915_gem_get_tiling get_tiling;
-
- /* At the moment most applications only have a few named bo.
- * For instance, in a DRI client only the render buffers passed
- * between X and the client are named. And since X returns the
- * alternating names for the front/back buffer a linear search
- * provides a sufficiently fast match.
- */
- pthread_mutex_lock(&bufmgr->lock);
- bo = hash_find_bo(bufmgr->name_table, handle);
- if (bo) {
- brw_bo_reference(bo);
- goto out;
- }
-
- memclear(open_arg);
- open_arg.name = handle;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
- if (ret != 0) {
- DBG("Couldn't reference %s handle 0x%08x: %s\n",
- name, handle, strerror(errno));
- bo = NULL;
- goto out;
- }
- /* Now see if someone has used a prime handle to get this
- * object from the kernel before by looking through the list
- * again for a matching gem_handle
- */
- bo = hash_find_bo(bufmgr->handle_table, open_arg.handle);
- if (bo) {
- brw_bo_reference(bo);
- goto out;
- }
-
- bo = calloc(1, sizeof(*bo));
- if (!bo)
- goto out;
-
- p_atomic_set(&bo->refcount, 1);
- list_inithead(&bo->vma_list);
-
- bo->size = open_arg.size;
- bo->offset64 = 0;
- bo->virtual = NULL;
- bo->bufmgr = bufmgr;
- bo->gem_handle = open_arg.handle;
- bo->name = name;
- bo->global_name = handle;
- bo->reusable = false;
-
- _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
- _mesa_hash_table_insert(bufmgr->name_table, &bo->global_name, bo);
-
- memclear(get_tiling);
- get_tiling.handle = bo->gem_handle;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling);
- if (ret != 0)
- goto err_unref;
-
- bo->tiling_mode = get_tiling.tiling_mode;
- bo->swizzle_mode = get_tiling.swizzle_mode;
- /* XXX stride is unknown */
- DBG("bo_create_from_handle: %d (%s)\n", handle, bo->name);
-
-out:
- pthread_mutex_unlock(&bufmgr->lock);
- return bo;
-
-err_unref:
- bo_free(bo);
- pthread_mutex_unlock(&bufmgr->lock);
- return NULL;
-}
-
-static void
-bo_free(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_gem_close close;
- struct hash_entry *entry;
- int ret;
-
- list_del(&bo->vma_list);
- if (bo->mem_virtual) {
- VG(VALGRIND_FREELIKE_BLOCK(bo->mem_virtual, 0));
- drm_munmap(bo->mem_virtual, bo->size);
- bufmgr->vma_count--;
- }
- if (bo->wc_virtual) {
- VG(VALGRIND_FREELIKE_BLOCK(bo->wc_virtual, 0));
- drm_munmap(bo->wc_virtual, bo->size);
- bufmgr->vma_count--;
- }
- if (bo->gtt_virtual) {
- drm_munmap(bo->gtt_virtual, bo->size);
- bufmgr->vma_count--;
- }
-
- if (bo->global_name) {
- entry = _mesa_hash_table_search(bufmgr->name_table, &bo->global_name);
- _mesa_hash_table_remove(bufmgr->name_table, entry);
- }
- entry = _mesa_hash_table_search(bufmgr->handle_table, &bo->gem_handle);
- _mesa_hash_table_remove(bufmgr->handle_table, entry);
-
- /* Close this object */
- memclear(close);
- close.handle = bo->gem_handle;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_CLOSE, &close);
- if (ret != 0) {
- DBG("DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n",
- bo->gem_handle, bo->name, strerror(errno));
- }
- free(bo);
-}
-
-static void
-bo_mark_mmaps_incoherent(struct brw_bo *bo)
-{
-#if HAVE_VALGRIND
- if (bo->mem_virtual)
- VALGRIND_MAKE_MEM_NOACCESS(bo->mem_virtual, bo->size);
-
- if (bo->wc_virtual)
- VALGRIND_MAKE_MEM_NOACCESS(bo->wc_virtual, bo->size);
-
- if (bo->gtt_virtual)
- VALGRIND_MAKE_MEM_NOACCESS(bo->gtt_virtual, bo->size);
-#endif
-}
-
-/** Frees all cached buffers significantly older than @time. */
-static void
-cleanup_bo_cache(struct brw_bufmgr *bufmgr, time_t time)
-{
- int i;
-
- if (bufmgr->time == time)
- return;
-
- for (i = 0; i < bufmgr->num_buckets; i++) {
- struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
-
- while (!list_empty(&bucket->head)) {
- struct brw_bo *bo;
-
- bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
- if (time - bo->free_time <= 1)
- break;
-
- list_del(&bo->head);
-
- bo_free(bo);
- }
- }
-
- bufmgr->time = time;
-}
-
-static void
-bo_purge_vma_cache(struct brw_bufmgr *bufmgr)
-{
- int limit;
-
- DBG("%s: cached=%d, open=%d, limit=%d\n", __FUNCTION__,
- bufmgr->vma_count, bufmgr->vma_open, bufmgr->vma_max);
-
- if (bufmgr->vma_max < 0)
- return;
-
- /* We may need to evict a few entries in order to create new mmaps */
- limit = bufmgr->vma_max - 2 * bufmgr->vma_open;
- if (limit < 0)
- limit = 0;
-
- while (bufmgr->vma_count > limit) {
- struct brw_bo *bo;
-
- bo = LIST_ENTRY(struct brw_bo, bufmgr->vma_cache.next, vma_list);
- assert(bo->map_count == 0);
- list_delinit(&bo->vma_list);
-
- if (bo->mem_virtual) {
- drm_munmap(bo->mem_virtual, bo->size);
- bo->mem_virtual = NULL;
- bufmgr->vma_count--;
- }
- if (bo->wc_virtual) {
- drm_munmap(bo->wc_virtual, bo->size);
- bo->wc_virtual = NULL;
- bufmgr->vma_count--;
- }
- if (bo->gtt_virtual) {
- drm_munmap(bo->gtt_virtual, bo->size);
- bo->gtt_virtual = NULL;
- bufmgr->vma_count--;
- }
- }
-}
-
-static void
-bo_close_vma(struct brw_bufmgr *bufmgr, struct brw_bo *bo)
-{
- bufmgr->vma_open--;
- list_addtail(&bo->vma_list, &bufmgr->vma_cache);
- if (bo->mem_virtual)
- bufmgr->vma_count++;
- if (bo->wc_virtual)
- bufmgr->vma_count++;
- if (bo->gtt_virtual)
- bufmgr->vma_count++;
- bo_purge_vma_cache(bufmgr);
-}
-
-static void
-bo_open_vma(struct brw_bufmgr *bufmgr, struct brw_bo *bo)
-{
- bufmgr->vma_open++;
- list_del(&bo->vma_list);
- if (bo->mem_virtual)
- bufmgr->vma_count--;
- if (bo->wc_virtual)
- bufmgr->vma_count--;
- if (bo->gtt_virtual)
- bufmgr->vma_count--;
- bo_purge_vma_cache(bufmgr);
-}
-
-static void
-bo_unreference_final(struct brw_bo *bo, time_t time)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct bo_cache_bucket *bucket;
-
- DBG("bo_unreference final: %d (%s)\n", bo->gem_handle, bo->name);
-
- /* Clear any left-over mappings */
- if (bo->map_count) {
- DBG("bo freed with non-zero map-count %d\n", bo->map_count);
- bo->map_count = 0;
- bo_close_vma(bufmgr, bo);
- bo_mark_mmaps_incoherent(bo);
- }
-
- bucket = bucket_for_size(bufmgr, bo->size);
- /* Put the buffer into our internal cache for reuse if we can. */
- if (bufmgr->bo_reuse && bo->reusable && bucket != NULL &&
- brw_bo_madvise(bo, I915_MADV_DONTNEED)) {
- bo->free_time = time;
-
- bo->name = NULL;
-
- list_addtail(&bo->head, &bucket->head);
- } else {
- bo_free(bo);
- }
-}
-
-void
-brw_bo_unreference(struct brw_bo *bo)
-{
- if (bo == NULL)
- return;
-
- assert(p_atomic_read(&bo->refcount) > 0);
-
- if (atomic_add_unless(&bo->refcount, -1, 1)) {
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct timespec time;
-
- clock_gettime(CLOCK_MONOTONIC, &time);
-
- pthread_mutex_lock(&bufmgr->lock);
-
- if (p_atomic_dec_zero(&bo->refcount)) {
- bo_unreference_final(bo, time.tv_sec);
- cleanup_bo_cache(bufmgr, time.tv_sec);
- }
-
- pthread_mutex_unlock(&bufmgr->lock);
- }
-}
-
-int
-brw_bo_map(struct brw_bo *bo, int write_enable)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_set_domain set_domain;
- int ret;
-
- pthread_mutex_lock(&bufmgr->lock);
-
- if (bo->map_count++ == 0)
- bo_open_vma(bufmgr, bo);
-
- if (!bo->mem_virtual) {
- struct drm_i915_gem_mmap mmap_arg;
-
- DBG("bo_map: %d (%s), map_count=%d\n",
- bo->gem_handle, bo->name, bo->map_count);
-
- memclear(mmap_arg);
- mmap_arg.handle = bo->gem_handle;
- mmap_arg.size = bo->size;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg);
- if (ret != 0) {
- ret = -errno;
- DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
- __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- pthread_mutex_unlock(&bufmgr->lock);
- return ret;
- }
- VG(VALGRIND_MALLOCLIKE_BLOCK(mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
- bo->mem_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
- }
- DBG("bo_map: %d (%s) -> %p\n", bo->gem_handle, bo->name, bo->mem_virtual);
- bo->virtual = bo->mem_virtual;
-
- memclear(set_domain);
- set_domain.handle = bo->gem_handle;
- set_domain.read_domains = I915_GEM_DOMAIN_CPU;
- if (write_enable)
- set_domain.write_domain = I915_GEM_DOMAIN_CPU;
- else
- set_domain.write_domain = 0;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
- if (ret != 0) {
- DBG("%s:%d: Error setting to CPU domain %d: %s\n",
- __FILE__, __LINE__, bo->gem_handle, strerror(errno));
- }
-
- bo_mark_mmaps_incoherent(bo);
- VG(VALGRIND_MAKE_MEM_DEFINED(bo->mem_virtual, bo->size));
- pthread_mutex_unlock(&bufmgr->lock);
-
- return 0;
-}
-
-static int
-map_gtt(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- int ret;
-
- if (bo->map_count++ == 0)
- bo_open_vma(bufmgr, bo);
-
- /* Get a mapping of the buffer if we haven't before. */
- if (bo->gtt_virtual == NULL) {
- struct drm_i915_gem_mmap_gtt mmap_arg;
-
- DBG("bo_map_gtt: mmap %d (%s), map_count=%d\n",
- bo->gem_handle, bo->name, bo->map_count);
-
- memclear(mmap_arg);
- mmap_arg.handle = bo->gem_handle;
-
- /* Get the fake offset back... */
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg);
- if (ret != 0) {
- ret = -errno;
- DBG("%s:%d: Error preparing buffer map %d (%s): %s .\n",
- __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- return ret;
- }
-
- /* and mmap it */
- bo->gtt_virtual = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
- MAP_SHARED, bufmgr->fd, mmap_arg.offset);
- if (bo->gtt_virtual == MAP_FAILED) {
- bo->gtt_virtual = NULL;
- ret = -errno;
- DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
- __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- return ret;
- }
- }
-
- bo->virtual = bo->gtt_virtual;
-
- DBG("bo_map_gtt: %d (%s) -> %p\n", bo->gem_handle, bo->name,
- bo->gtt_virtual);
-
- return 0;
-}
-
-int
-brw_bo_map_gtt(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_set_domain set_domain;
- int ret;
-
- pthread_mutex_lock(&bufmgr->lock);
-
- ret = map_gtt(bo);
- if (ret) {
- pthread_mutex_unlock(&bufmgr->lock);
- return ret;
- }
-
- /* Now move it to the GTT domain so that the GPU and CPU
- * caches are flushed and the GPU isn't actively using the
- * buffer.
- *
- * The pagefault handler does this domain change for us when
- * it has unbound the BO from the GTT, but it's up to us to
- * tell it when we're about to use things if we had done
- * rendering and it still happens to be bound to the GTT.
- */
- memclear(set_domain);
- set_domain.handle = bo->gem_handle;
- set_domain.read_domains = I915_GEM_DOMAIN_GTT;
- set_domain.write_domain = I915_GEM_DOMAIN_GTT;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
- if (ret != 0) {
- DBG("%s:%d: Error setting domain %d: %s\n",
- __FILE__, __LINE__, bo->gem_handle, strerror(errno));
- }
-
- bo_mark_mmaps_incoherent(bo);
- VG(VALGRIND_MAKE_MEM_DEFINED(bo->gtt_virtual, bo->size));
- pthread_mutex_unlock(&bufmgr->lock);
-
- return 0;
-}
-
-/**
- * Performs a mapping of the buffer object like the normal GTT
- * mapping, but avoids waiting for the GPU to be done reading from or
- * rendering to the buffer.
- *
- * This is used in the implementation of GL_ARB_map_buffer_range: The
- * user asks to create a buffer, then does a mapping, fills some
- * space, runs a drawing command, then asks to map it again without
- * synchronizing because it guarantees that it won't write over the
- * data that the GPU is busy using (or, more specifically, that if it
- * does write over the data, it acknowledges that rendering is
- * undefined).
- */
-
-int
-brw_bo_map_unsynchronized(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- int ret;
-
- /* If the CPU cache isn't coherent with the GTT, then use a
- * regular synchronized mapping. The problem is that we don't
- * track where the buffer was last used on the CPU side in
- * terms of brw_bo_map vs brw_bo_map_gtt, so
- * we would potentially corrupt the buffer even when the user
- * does reasonable things.
- */
- if (!bufmgr->has_llc)
- return brw_bo_map_gtt(bo);
-
- pthread_mutex_lock(&bufmgr->lock);
-
- ret = map_gtt(bo);
- if (ret == 0) {
- bo_mark_mmaps_incoherent(bo);
- VG(VALGRIND_MAKE_MEM_DEFINED(bo->gtt_virtual, bo->size));
- }
-
- pthread_mutex_unlock(&bufmgr->lock);
-
- return ret;
-}
-
-int
-brw_bo_unmap(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- int ret = 0;
-
- if (bo == NULL)
- return 0;
-
- pthread_mutex_lock(&bufmgr->lock);
-
- if (bo->map_count <= 0) {
- DBG("attempted to unmap an unmapped bo\n");
- pthread_mutex_unlock(&bufmgr->lock);
- /* Preserve the old behaviour of just treating this as a
- * no-op rather than reporting the error.
- */
- return 0;
- }
-
- /* We need to unmap after every innovation as we cannot track
- * an open vma for every bo as that will exhaust the system
- * limits and cause later failures.
- */
- if (--bo->map_count == 0) {
- bo_close_vma(bufmgr, bo);
- bo_mark_mmaps_incoherent(bo);
- bo->virtual = NULL;
- }
- pthread_mutex_unlock(&bufmgr->lock);
-
- return ret;
-}
-
-int
-brw_bo_subdata(struct brw_bo *bo, unsigned long offset,
- unsigned long size, const void *data)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_pwrite pwrite;
- int ret;
-
- memclear(pwrite);
- pwrite.handle = bo->gem_handle;
- pwrite.offset = offset;
- pwrite.size = size;
- pwrite.data_ptr = (uint64_t) (uintptr_t) data;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite);
- if (ret != 0) {
- ret = -errno;
- DBG("%s:%d: Error writing data to buffer %d: (%d %d) %s .\n",
- __FILE__, __LINE__, bo->gem_handle, (int) offset,
- (int) size, strerror(errno));
- }
-
- return ret;
-}
-
-int
-brw_bo_get_subdata(struct brw_bo *bo, unsigned long offset,
- unsigned long size, void *data)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_pread pread;
- int ret;
-
- memclear(pread);
- pread.handle = bo->gem_handle;
- pread.offset = offset;
- pread.size = size;
- pread.data_ptr = (uint64_t) (uintptr_t) data;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_PREAD, &pread);
- if (ret != 0) {
- ret = -errno;
- DBG("%s:%d: Error reading data from buffer %d: (%d %d) %s .\n",
- __FILE__, __LINE__, bo->gem_handle, (int) offset,
- (int) size, strerror(errno));
- }
-
- return ret;
-}
-
-/** Waits for all GPU rendering with the object to have completed. */
-void
-brw_bo_wait_rendering(struct brw_bo *bo)
-{
- brw_bo_start_gtt_access(bo, 1);
-}
-
-/**
- * Waits on a BO for the given amount of time.
- *
- * @bo: buffer object to wait for
- * @timeout_ns: amount of time to wait in nanoseconds.
- * If value is less than 0, an infinite wait will occur.
- *
- * Returns 0 if the wait was successful ie. the last batch referencing the
- * object has completed within the allotted time. Otherwise some negative return
- * value describes the error. Of particular interest is -ETIME when the wait has
- * failed to yield the desired result.
- *
- * Similar to brw_bo_wait_rendering except a timeout parameter allows
- * the operation to give up after a certain amount of time. Another subtle
- * difference is the internal locking semantics are different (this variant does
- * not hold the lock for the duration of the wait). This makes the wait subject
- * to a larger userspace race window.
- *
- * The implementation shall wait until the object is no longer actively
- * referenced within a batch buffer at the time of the call. The wait will
- * not guarantee that the buffer is re-issued via another thread, or an flinked
- * handle. Userspace must make sure this race does not occur if such precision
- * is important.
- *
- * Note that some kernels have broken the inifite wait for negative values
- * promise, upgrade to latest stable kernels if this is the case.
- */
-int
-brw_bo_wait(struct brw_bo *bo, int64_t timeout_ns)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_wait wait;
- int ret;
-
- memclear(wait);
- wait.bo_handle = bo->gem_handle;
- wait.timeout_ns = timeout_ns;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_WAIT, &wait);
- if (ret == -1)
- return -errno;
-
- return ret;
-}
-
-/**
- * Sets the object to the GTT read and possibly write domain, used by the X
- * 2D driver in the absence of kernel support to do brw_bo_map_gtt().
- *
- * In combination with brw_bo_pin() and manual fence management, we
- * can do tiled pixmaps this way.
- */
-void
-brw_bo_start_gtt_access(struct brw_bo *bo, int write_enable)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_set_domain set_domain;
- int ret;
-
- memclear(set_domain);
- set_domain.handle = bo->gem_handle;
- set_domain.read_domains = I915_GEM_DOMAIN_GTT;
- set_domain.write_domain = write_enable ? I915_GEM_DOMAIN_GTT : 0;
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
- if (ret != 0) {
- DBG("%s:%d: Error setting memory domains %d (%08x %08x): %s .\n",
- __FILE__, __LINE__, bo->gem_handle,
- set_domain.read_domains, set_domain.write_domain, strerror(errno));
- }
-}
-
-void
-brw_bufmgr_destroy(struct brw_bufmgr *bufmgr)
-{
- pthread_mutex_destroy(&bufmgr->lock);
-
- /* Free any cached buffer objects we were going to reuse */
- for (int i = 0; i < bufmgr->num_buckets; i++) {
- struct bo_cache_bucket *bucket = &bufmgr->cache_bucket[i];
- struct brw_bo *bo;
-
- while (!list_empty(&bucket->head)) {
- bo = LIST_ENTRY(struct brw_bo, bucket->head.next, head);
- list_del(&bo->head);
-
- bo_free(bo);
- }
- }
-
- _mesa_hash_table_destroy(bufmgr->name_table, NULL);
- _mesa_hash_table_destroy(bufmgr->handle_table, NULL);
-
- free(bufmgr);
-}
-
-static int
-bo_set_tiling_internal(struct brw_bo *bo, uint32_t tiling_mode,
- uint32_t stride)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
- struct drm_i915_gem_set_tiling set_tiling;
- int ret;
-
- if (bo->global_name == 0 &&
- tiling_mode == bo->tiling_mode && stride == bo->stride)
- return 0;
-
- memset(&set_tiling, 0, sizeof(set_tiling));
- do {
- /* set_tiling is slightly broken and overwrites the
- * input on the error path, so we have to open code
- * rmIoctl.
- */
- set_tiling.handle = bo->gem_handle;
- set_tiling.tiling_mode = tiling_mode;
- set_tiling.stride = stride;
-
- ret = ioctl(bufmgr->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
- } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
- if (ret == -1)
- return -errno;
-
- bo->tiling_mode = set_tiling.tiling_mode;
- bo->swizzle_mode = set_tiling.swizzle_mode;
- bo->stride = set_tiling.stride;
- return 0;
-}
-
-int
-brw_bo_set_tiling(struct brw_bo *bo, uint32_t *tiling_mode, uint32_t stride)
-{
- int ret;
-
- /* Linear buffers have no stride. By ensuring that we only ever use
- * stride 0 with linear buffers, we simplify our code.
- */
- if (*tiling_mode == I915_TILING_NONE)
- stride = 0;
-
- ret = bo_set_tiling_internal(bo, *tiling_mode, stride);
-
- *tiling_mode = bo->tiling_mode;
- return ret;
-}
-
-int
-brw_bo_get_tiling(struct brw_bo *bo, uint32_t *tiling_mode,
- uint32_t *swizzle_mode)
-{
- *tiling_mode = bo->tiling_mode;
- *swizzle_mode = bo->swizzle_mode;
- return 0;
-}
-
-struct brw_bo *
-brw_bo_gem_create_from_prime(struct brw_bufmgr *bufmgr, int prime_fd,
- int size)
-{
- int ret;
- uint32_t handle;
- struct brw_bo *bo;
- struct drm_i915_gem_get_tiling get_tiling;
-
- pthread_mutex_lock(&bufmgr->lock);
- ret = drmPrimeFDToHandle(bufmgr->fd, prime_fd, &handle);
- if (ret) {
- DBG("create_from_prime: failed to obtain handle from fd: %s\n",
- strerror(errno));
- pthread_mutex_unlock(&bufmgr->lock);
- return NULL;
- }
-
- /*
- * See if the kernel has already returned this buffer to us. Just as
- * for named buffers, we must not create two bo's pointing at the same
- * kernel object
- */
- bo = hash_find_bo(bufmgr->handle_table, handle);
- if (bo) {
- brw_bo_reference(bo);
- goto out;
- }
-
- bo = calloc(1, sizeof(*bo));
- if (!bo)
- goto out;
-
- p_atomic_set(&bo->refcount, 1);
- list_inithead(&bo->vma_list);
-
- /* Determine size of bo. The fd-to-handle ioctl really should
- * return the size, but it doesn't. If we have kernel 3.12 or
- * later, we can lseek on the prime fd to get the size. Older
- * kernels will just fail, in which case we fall back to the
- * provided (estimated or guess size). */
- ret = lseek(prime_fd, 0, SEEK_END);
- if (ret != -1)
- bo->size = ret;
- else
- bo->size = size;
-
- bo->bufmgr = bufmgr;
-
- bo->gem_handle = handle;
- _mesa_hash_table_insert(bufmgr->handle_table, &bo->gem_handle, bo);
-
- bo->name = "prime";
- bo->reusable = false;
-
- memclear(get_tiling);
- get_tiling.handle = bo->gem_handle;
- if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_GET_TILING, &get_tiling))
- goto err;
-
- bo->tiling_mode = get_tiling.tiling_mode;
- bo->swizzle_mode = get_tiling.swizzle_mode;
- /* XXX stride is unknown */
-
-out:
- pthread_mutex_unlock(&bufmgr->lock);
- return bo;
-
-err:
- bo_free(bo);
- pthread_mutex_unlock(&bufmgr->lock);
- return NULL;
-}
-
-int
-brw_bo_gem_export_to_prime(struct brw_bo *bo, int *prime_fd)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
-
- if (drmPrimeHandleToFD(bufmgr->fd, bo->gem_handle,
- DRM_CLOEXEC, prime_fd) != 0)
- return -errno;
-
- bo->reusable = false;
-
- return 0;
-}
-
-int
-brw_bo_flink(struct brw_bo *bo, uint32_t *name)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
-
- if (!bo->global_name) {
- struct drm_gem_flink flink;
-
- memclear(flink);
- flink.handle = bo->gem_handle;
- if (drmIoctl(bufmgr->fd, DRM_IOCTL_GEM_FLINK, &flink))
- return -errno;
-
- pthread_mutex_lock(&bufmgr->lock);
- if (!bo->global_name) {
- bo->global_name = flink.name;
- bo->reusable = false;
-
- _mesa_hash_table_insert(bufmgr->name_table, &bo->global_name, bo);
- }
- pthread_mutex_unlock(&bufmgr->lock);
- }
-
- *name = bo->global_name;
- return 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
-brw_bufmgr_enable_reuse(struct brw_bufmgr *bufmgr)
-{
- bufmgr->bo_reuse = true;
-}
-
-/*
- * Disable buffer reuse for objects which are shared with the kernel
- * as scanout buffers
- */
-int
-brw_bo_disable_reuse(struct brw_bo *bo)
-{
- bo->reusable = false;
- return 0;
-}
-
-int
-brw_bo_is_reusable(struct brw_bo *bo)
-{
- return bo->reusable;
-}
-
-static void
-add_bucket(struct brw_bufmgr *bufmgr, int size)
-{
- unsigned int i = bufmgr->num_buckets;
-
- assert(i < ARRAY_SIZE(bufmgr->cache_bucket));
-
- list_inithead(&bufmgr->cache_bucket[i].head);
- bufmgr->cache_bucket[i].size = size;
- bufmgr->num_buckets++;
-}
-
-static void
-init_cache_buckets(struct brw_bufmgr *bufmgr)
-{
- unsigned long size, cache_max_size = 64 * 1024 * 1024;
-
- /* OK, so power of two buckets was too wasteful of memory.
- * Give 3 other sizes between each power of two, to hopefully
- * cover things accurately enough. (The alternative is
- * probably to just go for exact matching of sizes, and assume
- * that for things like composited window resize the tiled
- * width/height alignment and rounding of sizes to pages will
- * get us useful cache hit rates anyway)
- */
- add_bucket(bufmgr, 4096);
- add_bucket(bufmgr, 4096 * 2);
- add_bucket(bufmgr, 4096 * 3);
-
- /* Initialize the linked lists for BO reuse cache. */
- for (size = 4 * 4096; size <= cache_max_size; size *= 2) {
- add_bucket(bufmgr, size);
-
- add_bucket(bufmgr, size + size * 1 / 4);
- add_bucket(bufmgr, size + size * 2 / 4);
- add_bucket(bufmgr, size + size * 3 / 4);
- }
-}
-
-void
-brw_bufmgr_gem_set_vma_cache_size(struct brw_bufmgr *bufmgr, int limit)
-{
- bufmgr->vma_max = limit;
-
- bo_purge_vma_cache(bufmgr);
-}
-
-uint32_t
-brw_create_hw_context(struct brw_bufmgr *bufmgr)
-{
- struct drm_i915_gem_context_create create;
- int ret;
-
- memclear(create);
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create);
- if (ret != 0) {
- DBG("DRM_IOCTL_I915_GEM_CONTEXT_CREATE failed: %s\n", strerror(errno));
- return 0;
- }
-
- return create.ctx_id;
-}
-
-void
-brw_destroy_hw_context(struct brw_bufmgr *bufmgr, uint32_t ctx_id)
-{
- struct drm_i915_gem_context_destroy d = {.ctx_id = ctx_id };
-
- if (ctx_id != 0 &&
- drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, &d) != 0) {
- fprintf(stderr, "DRM_IOCTL_I915_GEM_CONTEXT_DESTROY failed: %s\n",
- strerror(errno));
- }
-}
-
-int
-brw_reg_read(struct brw_bufmgr *bufmgr, uint32_t offset, uint64_t *result)
-{
- struct drm_i915_reg_read reg_read;
- int ret;
-
- memclear(reg_read);
- reg_read.offset = offset;
-
- ret = drmIoctl(bufmgr->fd, DRM_IOCTL_I915_REG_READ, ®_read);
-
- *result = reg_read.val;
- return ret;
-}
-
-void *
-brw_bo_map__gtt(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
-
- if (bo->gtt_virtual)
- return bo->gtt_virtual;
-
- pthread_mutex_lock(&bufmgr->lock);
- if (bo->gtt_virtual == NULL) {
- struct drm_i915_gem_mmap_gtt mmap_arg;
- void *ptr;
-
- DBG("bo_map_gtt: mmap %d (%s), map_count=%d\n",
- bo->gem_handle, bo->name, bo->map_count);
-
- if (bo->map_count++ == 0)
- bo_open_vma(bufmgr, bo);
-
- memclear(mmap_arg);
- mmap_arg.handle = bo->gem_handle;
-
- /* Get the fake offset back... */
- ptr = MAP_FAILED;
- if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg) == 0) {
- /* and mmap it */
- ptr = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
- MAP_SHARED, bufmgr->fd, mmap_arg.offset);
- }
- if (ptr == MAP_FAILED) {
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- ptr = NULL;
- }
-
- bo->gtt_virtual = ptr;
- }
- pthread_mutex_unlock(&bufmgr->lock);
-
- return bo->gtt_virtual;
-}
-
-void *
-brw_bo_map__cpu(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
-
- if (bo->mem_virtual)
- return bo->mem_virtual;
-
- pthread_mutex_lock(&bufmgr->lock);
- if (!bo->mem_virtual) {
- struct drm_i915_gem_mmap mmap_arg;
-
- if (bo->map_count++ == 0)
- bo_open_vma(bufmgr, bo);
-
- DBG("bo_map: %d (%s), map_count=%d\n",
- bo->gem_handle, bo->name, bo->map_count);
-
- memclear(mmap_arg);
- mmap_arg.handle = bo->gem_handle;
- mmap_arg.size = bo->size;
- if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) {
- DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
- __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- } else {
- VG(VALGRIND_MALLOCLIKE_BLOCK
- (mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
- bo->mem_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
- }
- }
- pthread_mutex_unlock(&bufmgr->lock);
-
- return bo->mem_virtual;
-}
-
-void *
-brw_bo_map__wc(struct brw_bo *bo)
-{
- struct brw_bufmgr *bufmgr = bo->bufmgr;
-
- if (bo->wc_virtual)
- return bo->wc_virtual;
-
- pthread_mutex_lock(&bufmgr->lock);
- if (!bo->wc_virtual) {
- struct drm_i915_gem_mmap mmap_arg;
-
- if (bo->map_count++ == 0)
- bo_open_vma(bufmgr, bo);
-
- DBG("bo_map: %d (%s), map_count=%d\n",
- bo->gem_handle, bo->name, bo->map_count);
-
- memclear(mmap_arg);
- mmap_arg.handle = bo->gem_handle;
- mmap_arg.size = bo->size;
- mmap_arg.flags = I915_MMAP_WC;
- if (drmIoctl(bufmgr->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg)) {
- DBG("%s:%d: Error mapping buffer %d (%s): %s .\n",
- __FILE__, __LINE__, bo->gem_handle, bo->name, strerror(errno));
- if (--bo->map_count == 0)
- bo_close_vma(bufmgr, bo);
- } else {
- VG(VALGRIND_MALLOCLIKE_BLOCK
- (mmap_arg.addr_ptr, mmap_arg.size, 0, 1));
- bo->wc_virtual = (void *) (uintptr_t) mmap_arg.addr_ptr;
- }
- }
- pthread_mutex_unlock(&bufmgr->lock);
-
- return bo->wc_virtual;
-}
-
-/**
- * Initializes the GEM buffer manager, which uses the kernel to allocate, map,
- * and manage map buffer objections.
- *
- * \param fd File descriptor of the opened DRM device.
- */
-struct brw_bufmgr *
-brw_bufmgr_init(struct gen_device_info *devinfo, int fd, int batch_size)
-{
- struct brw_bufmgr *bufmgr;
-
- bufmgr = calloc(1, sizeof(*bufmgr));
- if (bufmgr == NULL)
- return NULL;
-
- /* Handles to buffer objects belong to the device fd and are not
- * reference counted by the kernel. If the same fd is used by
- * multiple parties (threads sharing the same screen bufmgr, or
- * even worse the same device fd passed to multiple libraries)
- * ownership of those handles is shared by those independent parties.
- *
- * Don't do this! Ensure that each library/bufmgr has its own device
- * fd so that its namespace does not clash with another.
- */
- bufmgr->fd = fd;
-
- if (pthread_mutex_init(&bufmgr->lock, NULL) != 0) {
- free(bufmgr);
- return NULL;
- }
-
- bufmgr->has_llc = devinfo->has_llc;
-
- init_cache_buckets(bufmgr);
-
- list_inithead(&bufmgr->vma_cache);
- bufmgr->vma_max = -1; /* unlimited by default */
-
- bufmgr->name_table =
- _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
- bufmgr->handle_table =
- _mesa_hash_table_create(NULL, key_hash_uint, key_uint_equal);
-
- return bufmgr;
-}
projects / mesa.git / commitdiff