renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

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author	Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>	2007-02-14 15:32:08 +0100
committer	Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>	2007-02-14 15:32:08 +0100
commit	35eb12d8bf91e7a3b0702385fa47b648194803c4 (patch)
tree	6403fad22bc5e0199974587826b67b1c24a384a7 /bsd-core/mga/Makefile
parent	f524870184b29885c6207af21fcb45c47fbaa576 (diff)

Fix multiple spinlock unlocking

Diffstat (limited to 'bsd-core/mga/Makefile')

0 files changed, 0 insertions, 0 deletions

/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */ /* * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org> * * 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, sublicense, * 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 above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * 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 NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS 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. * * Authors: * Rob Clark <robclark@freedesktop.org> */ #include "freedreno_drmif.h" #include "freedreno_priv.h" static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER; static void bo_del(struct fd_bo *bo); /* set buffer name, and add to table, call w/ table_lock held: */ static void set_name(struct fd_bo *bo, uint32_t name) { bo->name = name; /* add ourself into the handle table: */ drmHashInsert(bo->dev->name_table, name, bo); } /* lookup a buffer, call w/ table_lock held: */ static struct fd_bo * lookup_bo(void *tbl, uint32_t key) { struct fd_bo *bo = NULL; if (!drmHashLookup(tbl, key, (void **)&bo)) { /* found, incr refcnt and return: */ bo = fd_bo_ref(bo); } return bo; } /* allocate a new buffer object, call w/ table_lock held */ static struct fd_bo * bo_from_handle(struct fd_device *dev, uint32_t size, uint32_t handle) { struct fd_bo *bo; bo = dev->funcs->bo_from_handle(dev, size, handle); if (!bo) { struct drm_gem_close req = { .handle = handle, }; drmIoctl(dev->fd, DRM_IOCTL_GEM_CLOSE, &req); return NULL; } bo->dev = fd_device_ref(dev); bo->size = size; bo->handle = handle; atomic_set(&bo->refcnt, 1); list_inithead(&bo->list); /* add ourself into the handle table: */ drmHashInsert(dev->handle_table, handle, bo); return bo; } /* Frees older cached buffers. Called under table_lock */ void fd_cleanup_bo_cache(struct fd_device *dev, time_t time) { int i; if (dev->time == time) return; for (i = 0; i < dev->num_buckets; i++) { struct fd_bo_bucket *bucket = &dev->cache_bucket[i]; struct fd_bo *bo; while (!LIST_IS_EMPTY(&bucket->list)) { bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list); /* keep things in cache for at least 1 second: */ if (time && ((time - bo->free_time) <= 1)) break; list_del(&bo->list); bo_del(bo); } } dev->time = time; } static struct fd_bo_bucket * get_bucket(struct fd_device *dev, uint32_t size) { int i; /* hmm, this is what intel does, but I suppose we could calculate our * way to the correct bucket size rather than looping.. */ for (i = 0; i < dev->num_buckets; i++) { struct fd_bo_bucket *bucket = &dev->cache_bucket[i]; if (bucket->size >= size) { return bucket; } } return NULL; } static int is_idle(struct fd_bo *bo) { return fd_bo_cpu_prep(bo, NULL, DRM_FREEDRENO_PREP_READ | DRM_FREEDRENO_PREP_WRITE | DRM_FREEDRENO_PREP_NOSYNC) == 0; } static struct fd_bo *find_in_bucket(struct fd_device *dev, struct fd_bo_bucket *bucket, uint32_t flags) { struct fd_bo *bo = NULL; /* TODO .. if we had an ALLOC_FOR_RENDER flag like intel, we could * skip the busy check.. if it is only going to be a render target * then we probably don't need to stall.. * * NOTE that intel takes ALLOC_FOR_RENDER bo's from the list tail * (MRU, since likely to be in GPU cache), rather than head (LRU).. */ pthread_mutex_lock(&table_lock); while (!LIST_IS_EMPTY(&bucket->list)) { bo = LIST_ENTRY(struct fd_bo, bucket->list.next, list); if (0 /* TODO: if madvise tells us bo is gone... */) { list_del(&bo->list); bo_del(bo); bo = NULL; continue; } /* TODO check for compatible flags? */ if (is_idle(bo)) { list_del(&bo->list); break; } bo = NULL; break; } pthread_mutex_unlock(&table_lock); return bo; } struct fd_bo * fd_bo_new(struct fd_device *dev, uint32_t size, uint32_t flags) { struct fd_bo *bo = NULL; struct fd_bo_bucket *bucket; uint32_t handle; int ret; size = ALIGN(size, 4096); bucket = get_bucket(dev, size); /* see if we can be green and recycle: */ if (bucket) { size = bucket->size; bo = find_in_bucket(dev, bucket, flags); if (bo) { atomic_set(&bo->refcnt, 1); fd_device_ref(bo->dev); return bo; } } ret = dev->funcs->bo_new_handle(dev, size, flags, &handle); if (ret) return NULL; pthread_mutex_lock(&table_lock); bo = bo_from_handle(dev, size, handle); bo->bo_reuse = 1; pthread_mutex_unlock(&table_lock); return bo; } struct fd_bo *fd_bo_from_handle(struct fd_device *dev, uint32_t handle, uint32_t size) { struct fd_bo *bo = NULL; pthread_mutex_lock(&table_lock); bo = bo_from_handle(dev, size, handle); pthread_mutex_unlock(&table_lock); return bo; } struct fd_bo * fd_bo_from_name(struct fd_device *dev, uint32_t name) { struct drm_gem_open req = { .name = name, }; struct fd_bo *bo; pthread_mutex_lock(&table_lock); /* check name table first, to see if bo is already open: */ bo = lookup_bo(dev->name_table, name); if (bo) goto out_unlock; if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) { ERROR_MSG("gem-open failed: %s", strerror(errno)); goto out_unlock; } bo = lookup_bo(dev->handle_table, req.handle); if (bo) goto out_unlock; bo = bo_from_handle(dev, req.size, req.handle); if (bo) set_name(bo, name); out_unlock: pthread_mutex_unlock(&table_lock); return bo; } struct fd_bo * fd_bo_ref(struct fd_bo *bo) { atomic_inc(&bo->refcnt); return bo; } void fd_bo_del(struct fd_bo *bo) { struct fd_device *dev = bo->dev; if (!atomic_dec_and_test(&bo->refcnt)) return; pthread_mutex_lock(&table_lock); if (bo->bo_reuse) { struct fd_bo_bucket *bucket = get_bucket(dev, bo->size); /* see if we can be green and recycle: */ if (bucket) { struct timespec time; clock_gettime(CLOCK_MONOTONIC, &time); bo->free_time = time.tv_sec; list_addtail(&bo->list, &bucket->list); fd_cleanup_bo_cache(dev, time.tv_sec); /* bo's in the bucket cache don't have a ref and * don't hold a ref to the dev: */ goto out; } } bo_del(bo); out: fd_device_del_locked(dev); pthread_mutex_unlock(&table_lock); } /* Called under table_lock */ static void bo_del(struct fd_bo *bo) { if (bo->map) munmap(bo->map, bo->size); /* TODO probably bo's in bucket list get removed from * handle table?? */ if (bo->handle) { struct drm_gem_close req = { .handle = bo->handle, }; drmHashDelete(bo->dev->handle_table, bo->handle); if (bo->name) drmHashDelete(bo->dev->name_table, bo->name); drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req); } bo->funcs->destroy(bo); } int fd_bo_get_name(struct fd_bo *bo, uint32_t *name) { if (!bo->name) { struct drm_gem_flink req = { .handle = bo->handle, }; int ret; ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req); if (ret) { return ret; } pthread_mutex_lock(&table_lock); set_name(bo, req.name); pthread_mutex_unlock(&table_lock); } *name = bo->name; return 0; } uint32_t fd_bo_handle(struct fd_bo *bo) { return bo->handle; } uint32_t fd_bo_size(struct fd_bo *bo) { return bo->size; } void * fd_bo_map(struct fd_bo *bo) { if (!bo->map) { uint64_t offset; int ret; ret = bo->funcs->offset(bo, &offset); if (ret) { return NULL; } bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED, bo->dev->fd, offset); if (bo->map == MAP_FAILED) { ERROR_MSG("mmap failed: %s", strerror(errno)); bo->map = NULL; } } return bo->map; } /* a bit odd to take the pipe as an arg, but it's a, umm, quirk of kgsl.. */ int fd_bo_cpu_prep(struct fd_bo *bo, struct fd_pipe *pipe, uint32_t op) { return bo->funcs->cpu_prep(bo, pipe, op); } void fd_bo_cpu_fini(struct fd_bo *bo) { bo->funcs->cpu_fini(bo); }


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