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drm/libdrm/intel/intel_bufmgr_gem.c

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/**************************************************************************
*
* 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 <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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <pthread.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "errno.h"
#include "intel_bufmgr.h"
#include "intel_bufmgr_priv.h"
#include "string.h"
#include "i915_drm.h"
#define DBG(...) do { \
if (bufmgr_gem->bufmgr.debug) \
fprintf(stderr, __VA_ARGS__); \
} while (0)
typedef struct _dri_bo_gem dri_bo_gem;
struct dri_gem_bo_bucket {
dri_bo_gem *head, **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_GEM_BO_BUCKETS 16
typedef struct _dri_bufmgr_gem {
dri_bufmgr bufmgr;
int fd;
int max_relocs;
pthread_mutex_t lock;
struct drm_i915_gem_exec_object *exec_objects;
dri_bo **exec_bos;
int exec_size;
int exec_count;
/** Array of lists of cached gem objects of power-of-two sizes */
struct dri_gem_bo_bucket cache_bucket[INTEL_GEM_BO_BUCKETS];
} dri_bufmgr_gem;
struct _dri_bo_gem {
dri_bo bo;
int refcount;
/** Boolean whether the mmap ioctl has been called for this buffer yet. */
int mapped;
uint32_t gem_handle;
const char *name;
/**
* Kenel-assigned global name for this object
*/
unsigned int global_name;
/**
* Index of the buffer within the validation list while preparing a
* batchbuffer execution.
*/
int validate_index;
/**
* Boolean whether we've started swrast
* Set when the buffer has been mapped
* Cleared when the buffer is unmapped
*/
int swrast;
/** Array passed to the DRM containing relocation information. */
struct drm_i915_gem_relocation_entry *relocs;
/** Array of bos corresponding to relocs[i].target_handle */
dri_bo **reloc_target_bo;
/** Number of entries in relocs */
int reloc_count;
/** Mapped address for the buffer */
void *virtual;
/** free list */
dri_bo_gem *next;
};
static void dri_gem_bo_reference_locked(dri_bo *bo);
static int
logbase2(int n)
{
int i = 1;
int log2 = 0;
while (n > i) {
i *= 2;
log2++;
}
return log2;
}
static struct dri_gem_bo_bucket *
dri_gem_bo_bucket_for_size(dri_bufmgr_gem *bufmgr_gem, 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_GEM_BO_BUCKETS)
return NULL;
return &bufmgr_gem->cache_bucket[i];
}
static void dri_gem_dump_validation_list(dri_bufmgr_gem *bufmgr_gem)
{
int i, j;
for (i = 0; i < bufmgr_gem->exec_count; i++) {
dri_bo *bo = bufmgr_gem->exec_bos[i];
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
if (bo_gem->relocs == NULL) {
DBG("%2d: %d (%s)\n", i, bo_gem->gem_handle, bo_gem->name);
continue;
}
for (j = 0; j < bo_gem->reloc_count; j++) {
dri_bo *target_bo = bo_gem->reloc_target_bo[j];
dri_bo_gem *target_gem = (dri_bo_gem *)target_bo;
DBG("%2d: %d (%s)@0x%08llx -> %d (%s)@0x%08lx + 0x%08x\n",
i,
bo_gem->gem_handle, bo_gem->name, bo_gem->relocs[j].offset,
target_gem->gem_handle, target_gem->name, target_bo->offset,
bo_gem->relocs[j].delta);
}
}
}
/**
* 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 *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
int index;
if (bo_gem->validate_index != -1)
return;
/* Extend the array of validation entries as necessary. */
if (bufmgr_gem->exec_count == bufmgr_gem->exec_size) {
int new_size = bufmgr_gem->exec_size * 2;
if (new_size == 0)
new_size = 5;
bufmgr_gem->exec_objects =
realloc(bufmgr_gem->exec_objects,
sizeof(*bufmgr_gem->exec_objects) * new_size);
bufmgr_gem->exec_bos =
realloc(bufmgr_gem->exec_bos,
sizeof(*bufmgr_gem->exec_bos) * new_size);
bufmgr_gem->exec_size = new_size;
}
index = bufmgr_gem->exec_count;
bo_gem->validate_index = index;
/* Fill in array entry */
bufmgr_gem->exec_objects[index].handle = bo_gem->gem_handle;
bufmgr_gem->exec_objects[index].relocation_count = bo_gem->reloc_count;
bufmgr_gem->exec_objects[index].relocs_ptr = (uintptr_t)bo_gem->relocs;
bufmgr_gem->exec_objects[index].alignment = 0;
bufmgr_gem->exec_objects[index].offset = 0;
bufmgr_gem->exec_bos[index] = bo;
dri_gem_bo_reference_locked(bo);
bufmgr_gem->exec_count++;
}
#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_gem *bo_gem = (dri_bo_gem *)bo;
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
bo_gem->relocs = malloc(bufmgr_gem->max_relocs *
sizeof(struct drm_i915_gem_relocation_entry));
bo_gem->reloc_target_bo = malloc(bufmgr_gem->max_relocs * sizeof(dri_bo *));
return 0;
}
static dri_bo *
dri_gem_bo_alloc(dri_bufmgr *bufmgr, const char *name,
unsigned long size, unsigned int alignment)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
dri_bo_gem *bo_gem;
unsigned int page_size = getpagesize();
int ret;
struct dri_gem_bo_bucket *bucket;
int alloc_from_cache = 0;
unsigned long bo_size;
/* Round the allocated size up to a power of two number of pages. */
bo_size = 1 << logbase2(size);
if (bo_size < page_size)
bo_size = page_size;
bucket = dri_gem_bo_bucket_for_size(bufmgr_gem, bo_size);
/* If we don't have caching at this size, don't actually round the
* allocation up.
*/
if (bucket == NULL || bucket->max_entries == 0) {
bo_size = size;
if (bo_size < page_size)
bo_size = page_size;
}
pthread_mutex_lock(&bufmgr_gem->lock);
/* Get a buffer out of the cache if available */
if (bucket != NULL && bucket->num_entries > 0) {
struct drm_i915_gem_busy busy;
bo_gem = bucket->head;
busy.handle = bo_gem->gem_handle;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
alloc_from_cache = (ret == 0 && busy.busy == 0);
if (alloc_from_cache) {
bucket->head = bo_gem->next;
if (bo_gem->next == NULL)
bucket->tail = &bucket->head;
bucket->num_entries--;
}
}
pthread_mutex_unlock(&bufmgr_gem->lock);
if (!alloc_from_cache) {
struct drm_i915_gem_create create;
bo_gem = calloc(1, sizeof(*bo_gem));
if (!bo_gem)
return NULL;
bo_gem->bo.size = bo_size;
memset(&create, 0, sizeof(create));
create.size = bo_size;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_CREATE, &create);
bo_gem->gem_handle = create.handle;
if (ret != 0) {
free(bo_gem);
return NULL;
}
bo_gem->bo.bufmgr = bufmgr;
}
bo_gem->name = name;
bo_gem->refcount = 1;
bo_gem->validate_index = -1;
DBG("bo_create: buf %d (%s) %ldb\n",
bo_gem->gem_handle, bo_gem->name, size);
return &bo_gem->bo;
}
/**
* 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_bo_gem_create_from_name(dri_bufmgr *bufmgr, const char *name,
unsigned int handle)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
dri_bo_gem *bo_gem;
int ret;
struct drm_gem_open open_arg;
bo_gem = calloc(1, sizeof(*bo_gem));
if (!bo_gem)
return NULL;
memset(&open_arg, 0, sizeof(open_arg));
open_arg.name = handle;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
if (ret != 0) {
fprintf(stderr, "Couldn't reference %s handle 0x%08x: %s\n",
name, handle, strerror(errno));
free(bo_gem);
return NULL;
}
bo_gem->bo.size = open_arg.size;
bo_gem->bo.offset = 0;
bo_gem->bo.virtual = NULL;
bo_gem->bo.bufmgr = bufmgr;
bo_gem->name = name;
bo_gem->refcount = 1;
bo_gem->validate_index = -1;
bo_gem->gem_handle = open_arg.handle;
bo_gem->global_name = handle;
DBG("bo_create_from_handle: %d (%s)\n", handle, bo_gem->name);
return &bo_gem->bo;
}
static void
dri_gem_bo_reference(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
pthread_mutex_lock(&bufmgr_gem->lock);
bo_gem->refcount++;
pthread_mutex_unlock(&bufmgr_gem->lock);
}
static void
dri_gem_bo_reference_locked(dri_bo *bo)
{
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
bo_gem->refcount++;
}
static void
dri_gem_bo_free(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_gem_close close;
int ret;
if (bo_gem->mapped)
munmap (bo_gem->virtual, bo_gem->bo.size);
/* Close this object */
close.handle = bo_gem->gem_handle;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_CLOSE, &close);
if (ret != 0) {
fprintf(stderr,
"DRM_IOCTL_GEM_CLOSE %d failed (%s): %s\n",
bo_gem->gem_handle, bo_gem->name, strerror(errno));
}
free(bo);
}
static void
dri_gem_bo_unreference_locked(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
if (--bo_gem->refcount == 0) {
struct dri_gem_bo_bucket *bucket;
if (bo_gem->relocs != NULL) {
int i;
/* Unreference all the target buffers */
for (i = 0; i < bo_gem->reloc_count; i++)
dri_gem_bo_unreference_locked(bo_gem->reloc_target_bo[i]);
free(bo_gem->reloc_target_bo);
free(bo_gem->relocs);
}
DBG("bo_unreference final: %d (%s)\n",
bo_gem->gem_handle, bo_gem->name);
bucket = dri_gem_bo_bucket_for_size(bufmgr_gem, bo->size);
/* Put the buffer into our internal cache for reuse if we can. */
if (bucket != NULL &&
(bucket->max_entries == -1 ||
(bucket->max_entries > 0 &&
bucket->num_entries < bucket->max_entries)))
{
bo_gem->name = 0;
bo_gem->validate_index = -1;
bo_gem->relocs = NULL;
bo_gem->reloc_target_bo = NULL;
bo_gem->reloc_count = 0;
bo_gem->next = NULL;
*bucket->tail = bo_gem;
bucket->tail = &bo_gem->next;
bucket->num_entries++;
} else {
dri_gem_bo_free(bo);
}
}
}
static void
dri_gem_bo_unreference(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
pthread_mutex_lock(&bufmgr_gem->lock);
dri_gem_bo_unreference_locked(bo);
pthread_mutex_unlock(&bufmgr_gem->lock);
}
static int
dri_gem_bo_map(dri_bo *bo, int write_enable)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_set_domain set_domain;
int ret;
pthread_mutex_lock(&bufmgr_gem->lock);
/* Allow recursive mapping. Mesa may recursively map buffers with
* nested display loops.
*/
if (!bo_gem->mapped) {
assert(bo->virtual == NULL);
DBG("bo_map: %d (%s)\n", bo_gem->gem_handle, bo_gem->name);
if (bo_gem->virtual == NULL) {
struct drm_i915_gem_mmap mmap_arg;
memset(&mmap_arg, 0, sizeof(mmap_arg));
mmap_arg.handle = bo_gem->gem_handle;
mmap_arg.offset = 0;
mmap_arg.size = bo->size;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_MMAP, &mmap_arg);
if (ret != 0) {
fprintf(stderr, "%s:%d: Error mapping buffer %d (%s): %s .\n",
__FILE__, __LINE__,
bo_gem->gem_handle, bo_gem->name, strerror(errno));
}
bo_gem->virtual = (void *)(uintptr_t)mmap_arg.addr_ptr;
}
bo->virtual = bo_gem->virtual;
bo_gem->swrast = 0;
bo_gem->mapped = 1;
DBG("bo_map: %d (%s) -> %p\n", bo_gem->gem_handle, bo_gem->name, bo_gem->virtual);
}
if (!bo_gem->swrast) {
set_domain.handle = bo_gem->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;
do {
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN,
&set_domain);
} while (ret == -1 && errno == EINTR);
if (ret != 0) {
fprintf (stderr, "%s:%d: Error setting swrast %d: %s\n",
__FILE__, __LINE__, bo_gem->gem_handle, strerror (errno));
}
bo_gem->swrast = 1;
}
pthread_mutex_unlock(&bufmgr_gem->lock);
return 0;
}
static int
dri_gem_bo_unmap(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_sw_finish sw_finish;
int ret;
if (bo == NULL)
return 0;
assert(bo_gem->mapped);
pthread_mutex_lock(&bufmgr_gem->lock);
if (bo_gem->swrast) {
sw_finish.handle = bo_gem->gem_handle;
do {
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SW_FINISH,
&sw_finish);
} while (ret == -1 && errno == EINTR);
bo_gem->swrast = 0;
}
pthread_mutex_unlock(&bufmgr_gem->lock);
return 0;
}
static int
dri_gem_bo_subdata (dri_bo *bo, unsigned long offset,
unsigned long size, const void *data)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_pwrite pwrite;
int ret;
memset (&pwrite, 0, sizeof (pwrite));
pwrite.handle = bo_gem->gem_handle;
pwrite.offset = offset;
pwrite.size = size;
pwrite.data_ptr = (uint64_t) (uintptr_t) data;
do {
ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite);
} while (ret == -1 && errno == EINTR);
if (ret != 0) {
fprintf (stderr, "%s:%d: Error writing data to buffer %d: (%d %d) %s .\n",
__FILE__, __LINE__,
bo_gem->gem_handle, (int) offset, (int) size,
strerror (errno));
}
return 0;
}
static int
dri_gem_bo_get_subdata (dri_bo *bo, unsigned long offset,
unsigned long size, void *data)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_pread pread;
int ret;
memset (&pread, 0, sizeof (pread));
pread.handle = bo_gem->gem_handle;
pread.offset = offset;
pread.size = size;
pread.data_ptr = (uint64_t) (uintptr_t) data;
do {
ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PREAD, &pread);
} while (ret == -1 && errno == EINTR);
if (ret != 0) {
fprintf (stderr, "%s:%d: Error reading data from buffer %d: (%d %d) %s .\n",
__FILE__, __LINE__,
bo_gem->gem_handle, (int) offset, (int) size,
strerror (errno));
}
return 0;
}
static void
dri_gem_bo_wait_rendering(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_set_domain set_domain;
int ret;
set_domain.handle = bo_gem->gem_handle;
set_domain.read_domains = I915_GEM_DOMAIN_GTT;
set_domain.write_domain = 0;
ret = ioctl (bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_DOMAIN, &set_domain);
if (ret != 0) {
fprintf (stderr, "%s:%d: Error setting memory domains %d (%08x %08x): %s .\n",
__FILE__, __LINE__,
bo_gem->gem_handle, set_domain.read_domains, set_domain.write_domain,
strerror (errno));
}
}
static void
dri_bufmgr_gem_destroy(dri_bufmgr *bufmgr)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
int i;
free(bufmgr_gem->exec_objects);
free(bufmgr_gem->exec_bos);
pthread_mutex_destroy(&bufmgr_gem->lock);
/* Free any cached buffer objects we were going to reuse */
for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++) {
struct dri_gem_bo_bucket *bucket = &bufmgr_gem->cache_bucket[i];
dri_bo_gem *bo_gem;
while ((bo_gem = bucket->head) != NULL) {
bucket->head = bo_gem->next;
if (bo_gem->next == NULL)
bucket->tail = &bucket->head;
bucket->num_entries--;
dri_gem_bo_free(&bo_gem->bo);
}
}
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_bo.
*/
static int
dri_gem_bo_emit_reloc(dri_bo *bo, uint32_t read_domains, uint32_t write_domain,
uint32_t delta, uint32_t offset, dri_bo *target_bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
dri_bo_gem *target_bo_gem = (dri_bo_gem *)target_bo;
pthread_mutex_lock(&bufmgr_gem->lock);
/* Create a new relocation list if needed */
if (bo_gem->relocs == NULL)
intel_setup_reloc_list(bo);
/* Check overflow */
assert(bo_gem->reloc_count < bufmgr_gem->max_relocs);
/* Check args */
assert (offset <= bo->size - 4);
assert ((write_domain & (write_domain-1)) == 0);
bo_gem->relocs[bo_gem->reloc_count].offset = offset;
bo_gem->relocs[bo_gem->reloc_count].delta = delta;
bo_gem->relocs[bo_gem->reloc_count].target_handle =
target_bo_gem->gem_handle;
bo_gem->relocs[bo_gem->reloc_count].read_domains = read_domains;
bo_gem->relocs[bo_gem->reloc_count].write_domain = write_domain;
bo_gem->relocs[bo_gem->reloc_count].presumed_offset = target_bo->offset;
bo_gem->reloc_target_bo[bo_gem->reloc_count] = target_bo;
dri_gem_bo_reference_locked(target_bo);
bo_gem->reloc_count++;
pthread_mutex_unlock(&bufmgr_gem->lock);
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_gem_bo_process_reloc(dri_bo *bo)
{
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
int i;
if (bo_gem->relocs == NULL)
return;
for (i = 0; i < bo_gem->reloc_count; i++) {
dri_bo *target_bo = bo_gem->reloc_target_bo[i];
/* Continue walking the tree depth-first. */
dri_gem_bo_process_reloc(target_bo);
/* Add the target to the validate list */
intel_add_validate_buffer(target_bo);
}
}
static void
intel_update_buffer_offsets (dri_bufmgr_gem *bufmgr_gem)
{
int i;
for (i = 0; i < bufmgr_gem->exec_count; i++) {
dri_bo *bo = bufmgr_gem->exec_bos[i];
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
/* Update the buffer offset */
if (bufmgr_gem->exec_objects[i].offset != bo->offset) {
DBG("BO %d (%s) migrated: 0x%08lx -> 0x%08llx\n",
bo_gem->gem_handle, bo_gem->name, bo->offset,
bufmgr_gem->exec_objects[i].offset);
bo->offset = bufmgr_gem->exec_objects[i].offset;
}
}
}
static int
dri_gem_bo_exec(dri_bo *bo, int used,
drm_clip_rect_t *cliprects, int num_cliprects,
int DR4)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
struct drm_i915_gem_execbuffer execbuf;
int ret, i;
pthread_mutex_lock(&bufmgr_gem->lock);
/* Update indices and set up the validate list. */
dri_gem_bo_process_reloc(bo);
/* Add the batch buffer to the validation list. There are no relocations
* pointing to it.
*/
intel_add_validate_buffer(bo);
execbuf.buffers_ptr = (uintptr_t)bufmgr_gem->exec_objects;
execbuf.buffer_count = bufmgr_gem->exec_count;
execbuf.batch_start_offset = 0;
execbuf.batch_len = used;
execbuf.cliprects_ptr = (uintptr_t)cliprects;
execbuf.num_cliprects = num_cliprects;
execbuf.DR1 = 0;
execbuf.DR4 = DR4;
do {
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_EXECBUFFER, &execbuf);
} while (ret == -EAGAIN);
intel_update_buffer_offsets (bufmgr_gem);
if (bufmgr_gem->bufmgr.debug)
dri_gem_dump_validation_list(bufmgr_gem);
for (i = 0; i < bufmgr_gem->exec_count; i++) {
dri_bo *bo = bufmgr_gem->exec_bos[i];
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
/* Need to call swrast on next bo_map */
bo_gem->swrast = 0;
/* Disconnect the buffer from the validate list */
bo_gem->validate_index = -1;
dri_gem_bo_unreference_locked(bo);
bufmgr_gem->exec_bos[i] = NULL;
}
bufmgr_gem->exec_count = 0;
pthread_mutex_unlock(&bufmgr_gem->lock);
return 0;
}
static int
dri_gem_bo_pin(dri_bo *bo, uint32_t alignment)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_pin pin;
int ret;
pin.handle = bo_gem->gem_handle;
pin.alignment = alignment;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_PIN, &pin);
if (ret != 0)
return -errno;
bo->offset = pin.offset;
return 0;
}
static int
dri_gem_bo_unpin(dri_bo *bo)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_unpin unpin;
int ret;
unpin.handle = bo_gem->gem_handle;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_UNPIN, &unpin);
if (ret != 0)
return -errno;
return 0;
}
static int
dri_gem_bo_set_tiling(dri_bo *bo, uint32_t *tiling_mode)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_i915_gem_set_tiling set_tiling;
int ret;
set_tiling.handle = bo_gem->gem_handle;
set_tiling.tiling_mode = *tiling_mode;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_SET_TILING, &set_tiling);
if (ret != 0) {
*tiling_mode = I915_TILING_NONE;
return -errno;
}
*tiling_mode = set_tiling.tiling_mode;
return 0;
}
static int
dri_gem_bo_flink(dri_bo *bo, uint32_t *name)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bo->bufmgr;
dri_bo_gem *bo_gem = (dri_bo_gem *)bo;
struct drm_gem_flink flink;
int ret;
if (!bo_gem->global_name) {
flink.handle = bo_gem->gem_handle;
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_GEM_FLINK, &flink);
if (ret != 0)
return -errno;
bo_gem->global_name = flink.name;
}
*name = bo_gem->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
intel_bufmgr_gem_enable_reuse(dri_bufmgr *bufmgr)
{
dri_bufmgr_gem *bufmgr_gem = (dri_bufmgr_gem *)bufmgr;
int i;
for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++) {
bufmgr_gem->cache_bucket[i].max_entries = -1;
}
}
/*
*
*/
static int
dri_gem_check_aperture_space(dri_bo **bo_array, int count)
{
return 0;
}
/**
* 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.
*/
dri_bufmgr *
intel_bufmgr_gem_init(int fd, int batch_size)
{
dri_bufmgr_gem *bufmgr_gem;
int i;
bufmgr_gem = calloc(1, sizeof(*bufmgr_gem));
bufmgr_gem->fd = fd;
if (pthread_mutex_init(&bufmgr_gem->lock, NULL) != 0) {
free(bufmgr_gem);
return NULL;
}
/* 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_gem->max_relocs = batch_size / sizeof(uint32_t) / 2 - 2;
bufmgr_gem->bufmgr.bo_alloc = dri_gem_bo_alloc;
bufmgr_gem->bufmgr.bo_reference = dri_gem_bo_reference;
bufmgr_gem->bufmgr.bo_unreference = dri_gem_bo_unreference;
bufmgr_gem->bufmgr.bo_map = dri_gem_bo_map;
bufmgr_gem->bufmgr.bo_unmap = dri_gem_bo_unmap;
bufmgr_gem->bufmgr.bo_subdata = dri_gem_bo_subdata;
bufmgr_gem->bufmgr.bo_get_subdata = dri_gem_bo_get_subdata;
bufmgr_gem->bufmgr.bo_wait_rendering = dri_gem_bo_wait_rendering;
bufmgr_gem->bufmgr.bo_emit_reloc = dri_gem_bo_emit_reloc;
bufmgr_gem->bufmgr.bo_pin = dri_gem_bo_pin;
bufmgr_gem->bufmgr.bo_unpin = dri_gem_bo_unpin;
bufmgr_gem->bufmgr.bo_set_tiling = dri_gem_bo_set_tiling;
bufmgr_gem->bufmgr.bo_flink = dri_gem_bo_flink;
bufmgr_gem->bufmgr.bo_exec = dri_gem_bo_exec;
bufmgr_gem->bufmgr.destroy = dri_bufmgr_gem_destroy;
bufmgr_gem->bufmgr.debug = 0;
bufmgr_gem->bufmgr.check_aperture_space = dri_gem_check_aperture_space;
/* Initialize the linked lists for BO reuse cache. */
for (i = 0; i < INTEL_GEM_BO_BUCKETS; i++)
bufmgr_gem->cache_bucket[i].tail = &bufmgr_gem->cache_bucket[i].head;
return &bufmgr_gem->bufmgr;
}
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