drm/nouveau/nouveau.c

889 lines
20 KiB
C

/*
* Copyright 2012 Red Hat Inc.
*
* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Ben Skeggs
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <xf86drm.h>
#include <xf86atomic.h>
#include "libdrm_macros.h"
#include "libdrm_lists.h"
#include "nouveau_drm.h"
#include "nouveau.h"
#include "private.h"
#include "nvif/class.h"
#include "nvif/cl0080.h"
#include "nvif/ioctl.h"
#include "nvif/unpack.h"
drm_private FILE *nouveau_out = NULL;
drm_private uint32_t nouveau_debug = 0;
static void
debug_init(void)
{
static bool once = false;
char *debug, *out;
if (once)
return;
once = true;
debug = getenv("NOUVEAU_LIBDRM_DEBUG");
if (debug) {
int n = strtol(debug, NULL, 0);
if (n >= 0)
nouveau_debug = n;
}
nouveau_out = stderr;
out = getenv("NOUVEAU_LIBDRM_OUT");
if (out) {
FILE *fout = fopen(out, "w");
if (fout)
nouveau_out = fout;
}
}
static int
nouveau_object_ioctl(struct nouveau_object *obj, void *data, uint32_t size)
{
struct nouveau_drm *drm = nouveau_drm(obj);
union {
struct nvif_ioctl_v0 v0;
} *args = data;
uint32_t argc = size;
int ret = -ENOSYS;
if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
if (!obj->length) {
if (obj != &drm->client)
args->v0.object = (unsigned long)(void *)obj;
else
args->v0.object = 0;
args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
args->v0.route = 0x00;
} else {
args->v0.route = 0xff;
args->v0.token = obj->handle;
}
} else
return ret;
return drmCommandWriteRead(drm->fd, DRM_NOUVEAU_NVIF, args, argc);
}
drm_public int
nouveau_object_mthd(struct nouveau_object *obj,
uint32_t mthd, void *data, uint32_t size)
{
struct nouveau_drm *drm = nouveau_drm(obj);
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_mthd_v0 mthd;
} *args;
uint32_t argc = sizeof(*args) + size;
uint8_t stack[128];
int ret;
if (!drm->nvif)
return -ENOSYS;
if (argc > sizeof(stack)) {
if (!(args = malloc(argc)))
return -ENOMEM;
} else {
args = (void *)stack;
}
args->ioctl.version = 0;
args->ioctl.type = NVIF_IOCTL_V0_MTHD;
args->mthd.version = 0;
args->mthd.method = mthd;
memcpy(args->mthd.data, data, size);
ret = nouveau_object_ioctl(obj, args, argc);
memcpy(data, args->mthd.data, size);
if (args != (void *)stack)
free(args);
return ret;
}
drm_public void
nouveau_object_sclass_put(struct nouveau_sclass **psclass)
{
free(*psclass);
*psclass = NULL;
}
drm_public int
nouveau_object_sclass_get(struct nouveau_object *obj,
struct nouveau_sclass **psclass)
{
struct nouveau_drm *drm = nouveau_drm(obj);
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_sclass_v0 sclass;
} *args = NULL;
struct nouveau_sclass *sclass;
int ret, cnt = 0, i;
uint32_t size;
if (!drm->nvif)
return abi16_sclass(obj, psclass);
while (1) {
size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]);
if (!(args = malloc(size)))
return -ENOMEM;
args->ioctl.version = 0;
args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
args->sclass.version = 0;
args->sclass.count = cnt;
ret = nouveau_object_ioctl(obj, args, size);
if (ret == 0 && args->sclass.count <= cnt)
break;
cnt = args->sclass.count;
free(args);
if (ret != 0)
return ret;
}
if ((sclass = calloc(args->sclass.count, sizeof(*sclass)))) {
for (i = 0; i < args->sclass.count; i++) {
sclass[i].oclass = args->sclass.oclass[i].oclass;
sclass[i].minver = args->sclass.oclass[i].minver;
sclass[i].maxver = args->sclass.oclass[i].maxver;
}
*psclass = sclass;
ret = args->sclass.count;
} else {
ret = -ENOMEM;
}
free(args);
return ret;
}
drm_public int
nouveau_object_mclass(struct nouveau_object *obj,
const struct nouveau_mclass *mclass)
{
struct nouveau_sclass *sclass;
int ret = -ENODEV;
int cnt, i, j;
cnt = nouveau_object_sclass_get(obj, &sclass);
if (cnt < 0)
return cnt;
for (i = 0; ret < 0 && mclass[i].oclass; i++) {
for (j = 0; j < cnt; j++) {
if (mclass[i].oclass == sclass[j].oclass &&
mclass[i].version >= sclass[j].minver &&
mclass[i].version <= sclass[j].maxver) {
ret = i;
break;
}
}
}
nouveau_object_sclass_put(&sclass);
return ret;
}
static void
nouveau_object_fini(struct nouveau_object *obj)
{
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_del del;
} args = {
.ioctl.type = NVIF_IOCTL_V0_DEL,
};
if (obj->data) {
abi16_delete(obj);
free(obj->data);
obj->data = NULL;
return;
}
nouveau_object_ioctl(obj, &args, sizeof(args));
}
static int
nouveau_object_init(struct nouveau_object *parent, uint32_t handle,
int32_t oclass, void *data, uint32_t size,
struct nouveau_object *obj)
{
struct nouveau_drm *drm = nouveau_drm(parent);
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_new_v0 new;
} *args;
uint32_t argc = sizeof(*args) + size;
int (*func)(struct nouveau_object *);
int ret = -ENOSYS;
obj->parent = parent;
obj->handle = handle;
obj->oclass = oclass;
obj->length = 0;
obj->data = NULL;
if (!abi16_object(obj, &func) && drm->nvif) {
if (!(args = malloc(argc)))
return -ENOMEM;
args->ioctl.version = 0;
args->ioctl.type = NVIF_IOCTL_V0_NEW;
args->new.version = 0;
args->new.route = NVIF_IOCTL_V0_ROUTE_NVIF;
args->new.token = (unsigned long)(void *)obj;
args->new.object = (unsigned long)(void *)obj;
args->new.handle = handle;
args->new.oclass = oclass;
memcpy(args->new.data, data, size);
ret = nouveau_object_ioctl(parent, args, argc);
memcpy(data, args->new.data, size);
free(args);
} else
if (func) {
obj->length = size ? size : sizeof(struct nouveau_object *);
if (!(obj->data = malloc(obj->length)))
return -ENOMEM;
if (data)
memcpy(obj->data, data, obj->length);
*(struct nouveau_object **)obj->data = obj;
ret = func(obj);
}
if (ret) {
nouveau_object_fini(obj);
return ret;
}
return 0;
}
drm_public int
nouveau_object_new(struct nouveau_object *parent, uint64_t handle,
uint32_t oclass, void *data, uint32_t length,
struct nouveau_object **pobj)
{
struct nouveau_object *obj;
int ret;
if (!(obj = malloc(sizeof(*obj))))
return -ENOMEM;
ret = nouveau_object_init(parent, handle, oclass, data, length, obj);
if (ret) {
free(obj);
return ret;
}
*pobj = obj;
return 0;
}
drm_public void
nouveau_object_del(struct nouveau_object **pobj)
{
struct nouveau_object *obj = *pobj;
if (obj) {
nouveau_object_fini(obj);
free(obj);
*pobj = NULL;
}
}
drm_public void
nouveau_drm_del(struct nouveau_drm **pdrm)
{
free(*pdrm);
*pdrm = NULL;
}
drm_public int
nouveau_drm_new(int fd, struct nouveau_drm **pdrm)
{
struct nouveau_drm *drm;
drmVersionPtr ver;
debug_init();
if (!(drm = calloc(1, sizeof(*drm))))
return -ENOMEM;
drm->fd = fd;
if (!(ver = drmGetVersion(fd))) {
nouveau_drm_del(&drm);
return -EINVAL;
}
*pdrm = drm;
drm->version = (ver->version_major << 24) |
(ver->version_minor << 8) |
ver->version_patchlevel;
drm->nvif = (drm->version >= 0x01000301);
drmFreeVersion(ver);
return 0;
}
/* this is the old libdrm's version of nouveau_device_wrap(), the symbol
* is kept here to prevent AIGLX from crashing if the DDX is linked against
* the new libdrm, but the DRI driver against the old
*/
drm_public int
nouveau_device_open_existing(struct nouveau_device **pdev, int close, int fd,
drm_context_t ctx)
{
return -EACCES;
}
drm_public int
nouveau_device_new(struct nouveau_object *parent, int32_t oclass,
void *data, uint32_t size, struct nouveau_device **pdev)
{
struct nv_device_info_v0 info = {};
union {
struct nv_device_v0 v0;
} *args = data;
uint32_t argc = size;
struct nouveau_drm *drm = nouveau_drm(parent);
struct nouveau_device_priv *nvdev;
struct nouveau_device *dev;
uint64_t v;
char *tmp;
int ret = -ENOSYS;
if (oclass != NV_DEVICE ||
nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))
return ret;
if (!(nvdev = calloc(1, sizeof(*nvdev))))
return -ENOMEM;
dev = *pdev = &nvdev->base;
dev->fd = -1;
if (drm->nvif) {
ret = nouveau_object_init(parent, 0, oclass, args, argc,
&dev->object);
if (ret)
goto done;
info.version = 0;
ret = nouveau_object_mthd(&dev->object, NV_DEVICE_V0_INFO,
&info, sizeof(info));
if (ret)
goto done;
nvdev->base.chipset = info.chipset;
nvdev->have_bo_usage = true;
} else
if (args->v0.device == ~0ULL) {
nvdev->base.object.parent = &drm->client;
nvdev->base.object.handle = ~0ULL;
nvdev->base.object.oclass = NOUVEAU_DEVICE_CLASS;
nvdev->base.object.length = ~0;
ret = nouveau_getparam(dev, NOUVEAU_GETPARAM_CHIPSET_ID, &v);
if (ret)
goto done;
nvdev->base.chipset = v;
ret = nouveau_getparam(dev, NOUVEAU_GETPARAM_HAS_BO_USAGE, &v);
if (ret == 0)
nvdev->have_bo_usage = (v != 0);
} else
return -ENOSYS;
ret = nouveau_getparam(dev, NOUVEAU_GETPARAM_FB_SIZE, &v);
if (ret)
goto done;
nvdev->base.vram_size = v;
ret = nouveau_getparam(dev, NOUVEAU_GETPARAM_AGP_SIZE, &v);
if (ret)
goto done;
nvdev->base.gart_size = v;
tmp = getenv("NOUVEAU_LIBDRM_VRAM_LIMIT_PERCENT");
if (tmp)
nvdev->vram_limit_percent = atoi(tmp);
else
nvdev->vram_limit_percent = 80;
nvdev->base.vram_limit =
(nvdev->base.vram_size * nvdev->vram_limit_percent) / 100;
tmp = getenv("NOUVEAU_LIBDRM_GART_LIMIT_PERCENT");
if (tmp)
nvdev->gart_limit_percent = atoi(tmp);
else
nvdev->gart_limit_percent = 80;
nvdev->base.gart_limit =
(nvdev->base.gart_size * nvdev->gart_limit_percent) / 100;
ret = pthread_mutex_init(&nvdev->lock, NULL);
DRMINITLISTHEAD(&nvdev->bo_list);
done:
if (ret)
nouveau_device_del(pdev);
return ret;
}
drm_public int
nouveau_device_wrap(int fd, int close, struct nouveau_device **pdev)
{
struct nouveau_drm *drm;
struct nouveau_device_priv *nvdev;
int ret;
ret = nouveau_drm_new(fd, &drm);
if (ret)
return ret;
drm->nvif = false;
ret = nouveau_device_new(&drm->client, NV_DEVICE,
&(struct nv_device_v0) {
.device = ~0ULL,
}, sizeof(struct nv_device_v0), pdev);
if (ret) {
nouveau_drm_del(&drm);
return ret;
}
nvdev = nouveau_device(*pdev);
nvdev->base.fd = drm->fd;
nvdev->base.drm_version = drm->version;
nvdev->close = close;
return 0;
}
drm_public int
nouveau_device_open(const char *busid, struct nouveau_device **pdev)
{
int ret = -ENODEV, fd = drmOpen("nouveau", busid);
if (fd >= 0) {
ret = nouveau_device_wrap(fd, 1, pdev);
if (ret)
drmClose(fd);
}
return ret;
}
drm_public void
nouveau_device_del(struct nouveau_device **pdev)
{
struct nouveau_device_priv *nvdev = nouveau_device(*pdev);
if (nvdev) {
free(nvdev->client);
pthread_mutex_destroy(&nvdev->lock);
if (nvdev->base.fd >= 0) {
struct nouveau_drm *drm =
nouveau_drm(&nvdev->base.object);
nouveau_drm_del(&drm);
if (nvdev->close)
drmClose(nvdev->base.fd);
}
free(nvdev);
*pdev = NULL;
}
}
drm_public int
nouveau_getparam(struct nouveau_device *dev, uint64_t param, uint64_t *value)
{
struct nouveau_drm *drm = nouveau_drm(&dev->object);
struct drm_nouveau_getparam r = { .param = param };
int fd = drm->fd, ret =
drmCommandWriteRead(fd, DRM_NOUVEAU_GETPARAM, &r, sizeof(r));
*value = r.value;
return ret;
}
drm_public int
nouveau_setparam(struct nouveau_device *dev, uint64_t param, uint64_t value)
{
struct nouveau_drm *drm = nouveau_drm(&dev->object);
struct drm_nouveau_setparam r = { .param = param, .value = value };
return drmCommandWrite(drm->fd, DRM_NOUVEAU_SETPARAM, &r, sizeof(r));
}
drm_public int
nouveau_client_new(struct nouveau_device *dev, struct nouveau_client **pclient)
{
struct nouveau_device_priv *nvdev = nouveau_device(dev);
struct nouveau_client_priv *pcli;
int id = 0, i, ret = -ENOMEM;
uint32_t *clients;
pthread_mutex_lock(&nvdev->lock);
for (i = 0; i < nvdev->nr_client; i++) {
id = ffs(nvdev->client[i]) - 1;
if (id >= 0)
goto out;
}
clients = realloc(nvdev->client, sizeof(uint32_t) * (i + 1));
if (!clients)
goto unlock;
nvdev->client = clients;
nvdev->client[i] = 0;
nvdev->nr_client++;
out:
pcli = calloc(1, sizeof(*pcli));
if (pcli) {
nvdev->client[i] |= (1 << id);
pcli->base.device = dev;
pcli->base.id = (i * 32) + id;
ret = 0;
}
*pclient = &pcli->base;
unlock:
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
drm_public void
nouveau_client_del(struct nouveau_client **pclient)
{
struct nouveau_client_priv *pcli = nouveau_client(*pclient);
struct nouveau_device_priv *nvdev;
if (pcli) {
int id = pcli->base.id;
nvdev = nouveau_device(pcli->base.device);
pthread_mutex_lock(&nvdev->lock);
nvdev->client[id / 32] &= ~(1 << (id % 32));
pthread_mutex_unlock(&nvdev->lock);
free(pcli->kref);
free(pcli);
}
}
static void
nouveau_bo_del(struct nouveau_bo *bo)
{
struct nouveau_drm *drm = nouveau_drm(&bo->device->object);
struct nouveau_device_priv *nvdev = nouveau_device(bo->device);
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
struct drm_gem_close req = { .handle = bo->handle };
if (nvbo->head.next) {
pthread_mutex_lock(&nvdev->lock);
if (atomic_read(&nvbo->refcnt) == 0) {
DRMLISTDEL(&nvbo->head);
/*
* This bo has to be closed with the lock held because
* gem handles are not refcounted. If a shared bo is
* closed and re-opened in another thread a race
* against DRM_IOCTL_GEM_OPEN or drmPrimeFDToHandle
* might cause the bo to be closed accidentally while
* re-importing.
*/
drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &req);
}
pthread_mutex_unlock(&nvdev->lock);
} else {
drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &req);
}
if (bo->map)
drm_munmap(bo->map, bo->size);
free(nvbo);
}
drm_public int
nouveau_bo_new(struct nouveau_device *dev, uint32_t flags, uint32_t align,
uint64_t size, union nouveau_bo_config *config,
struct nouveau_bo **pbo)
{
struct nouveau_bo_priv *nvbo = calloc(1, sizeof(*nvbo));
struct nouveau_bo *bo = &nvbo->base;
int ret;
if (!nvbo)
return -ENOMEM;
atomic_set(&nvbo->refcnt, 1);
bo->device = dev;
bo->flags = flags;
bo->size = size;
ret = abi16_bo_init(bo, align, config);
if (ret) {
free(nvbo);
return ret;
}
*pbo = bo;
return 0;
}
static int
nouveau_bo_wrap_locked(struct nouveau_device *dev, uint32_t handle,
struct nouveau_bo **pbo, int name)
{
struct nouveau_drm *drm = nouveau_drm(&dev->object);
struct nouveau_device_priv *nvdev = nouveau_device(dev);
struct drm_nouveau_gem_info req = { .handle = handle };
struct nouveau_bo_priv *nvbo;
int ret;
DRMLISTFOREACHENTRY(nvbo, &nvdev->bo_list, head) {
if (nvbo->base.handle == handle) {
if (atomic_inc_return(&nvbo->refcnt) == 1) {
/*
* Uh oh, this bo is dead and someone else
* will free it, but because refcnt is
* now non-zero fortunately they won't
* call the ioctl to close the bo.
*
* Remove this bo from the list so other
* calls to nouveau_bo_wrap_locked will
* see our replacement nvbo.
*/
DRMLISTDEL(&nvbo->head);
if (!name)
name = nvbo->name;
break;
}
*pbo = &nvbo->base;
return 0;
}
}
ret = drmCommandWriteRead(drm->fd, DRM_NOUVEAU_GEM_INFO,
&req, sizeof(req));
if (ret)
return ret;
nvbo = calloc(1, sizeof(*nvbo));
if (nvbo) {
atomic_set(&nvbo->refcnt, 1);
nvbo->base.device = dev;
abi16_bo_info(&nvbo->base, &req);
nvbo->name = name;
DRMLISTADD(&nvbo->head, &nvdev->bo_list);
*pbo = &nvbo->base;
return 0;
}
return -ENOMEM;
}
static void
nouveau_bo_make_global(struct nouveau_bo_priv *nvbo)
{
if (!nvbo->head.next) {
struct nouveau_device_priv *nvdev = nouveau_device(nvbo->base.device);
pthread_mutex_lock(&nvdev->lock);
if (!nvbo->head.next)
DRMLISTADD(&nvbo->head, &nvdev->bo_list);
pthread_mutex_unlock(&nvdev->lock);
}
}
drm_public int
nouveau_bo_wrap(struct nouveau_device *dev, uint32_t handle,
struct nouveau_bo **pbo)
{
struct nouveau_device_priv *nvdev = nouveau_device(dev);
int ret;
pthread_mutex_lock(&nvdev->lock);
ret = nouveau_bo_wrap_locked(dev, handle, pbo, 0);
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
drm_public int
nouveau_bo_name_ref(struct nouveau_device *dev, uint32_t name,
struct nouveau_bo **pbo)
{
struct nouveau_drm *drm = nouveau_drm(&dev->object);
struct nouveau_device_priv *nvdev = nouveau_device(dev);
struct nouveau_bo_priv *nvbo;
struct drm_gem_open req = { .name = name };
int ret;
pthread_mutex_lock(&nvdev->lock);
DRMLISTFOREACHENTRY(nvbo, &nvdev->bo_list, head) {
if (nvbo->name == name) {
ret = nouveau_bo_wrap_locked(dev, nvbo->base.handle,
pbo, name);
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
}
ret = drmIoctl(drm->fd, DRM_IOCTL_GEM_OPEN, &req);
if (ret == 0) {
ret = nouveau_bo_wrap_locked(dev, req.handle, pbo, name);
}
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
drm_public int
nouveau_bo_name_get(struct nouveau_bo *bo, uint32_t *name)
{
struct drm_gem_flink req = { .handle = bo->handle };
struct nouveau_drm *drm = nouveau_drm(&bo->device->object);
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
*name = nvbo->name;
if (!*name) {
int ret = drmIoctl(drm->fd, DRM_IOCTL_GEM_FLINK, &req);
if (ret) {
*name = 0;
return ret;
}
nvbo->name = *name = req.name;
nouveau_bo_make_global(nvbo);
}
return 0;
}
drm_public void
nouveau_bo_ref(struct nouveau_bo *bo, struct nouveau_bo **pref)
{
struct nouveau_bo *ref = *pref;
if (bo) {
atomic_inc(&nouveau_bo(bo)->refcnt);
}
if (ref) {
if (atomic_dec_and_test(&nouveau_bo(ref)->refcnt))
nouveau_bo_del(ref);
}
*pref = bo;
}
drm_public int
nouveau_bo_prime_handle_ref(struct nouveau_device *dev, int prime_fd,
struct nouveau_bo **bo)
{
struct nouveau_drm *drm = nouveau_drm(&dev->object);
struct nouveau_device_priv *nvdev = nouveau_device(dev);
int ret;
unsigned int handle;
nouveau_bo_ref(NULL, bo);
pthread_mutex_lock(&nvdev->lock);
ret = drmPrimeFDToHandle(drm->fd, prime_fd, &handle);
if (ret == 0) {
ret = nouveau_bo_wrap_locked(dev, handle, bo, 0);
}
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
drm_public int
nouveau_bo_set_prime(struct nouveau_bo *bo, int *prime_fd)
{
struct nouveau_drm *drm = nouveau_drm(&bo->device->object);
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
int ret;
ret = drmPrimeHandleToFD(drm->fd, nvbo->base.handle, DRM_CLOEXEC, prime_fd);
if (ret)
return ret;
nouveau_bo_make_global(nvbo);
return 0;
}
drm_public int
nouveau_bo_wait(struct nouveau_bo *bo, uint32_t access,
struct nouveau_client *client)
{
struct nouveau_drm *drm = nouveau_drm(&bo->device->object);
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
struct drm_nouveau_gem_cpu_prep req;
struct nouveau_pushbuf *push;
int ret = 0;
if (!(access & NOUVEAU_BO_RDWR))
return 0;
push = cli_push_get(client, bo);
if (push && push->channel)
nouveau_pushbuf_kick(push, push->channel);
if (!nvbo->head.next && !(nvbo->access & NOUVEAU_BO_WR) &&
!(access & NOUVEAU_BO_WR))
return 0;
req.handle = bo->handle;
req.flags = 0;
if (access & NOUVEAU_BO_WR)
req.flags |= NOUVEAU_GEM_CPU_PREP_WRITE;
if (access & NOUVEAU_BO_NOBLOCK)
req.flags |= NOUVEAU_GEM_CPU_PREP_NOWAIT;
ret = drmCommandWrite(drm->fd, DRM_NOUVEAU_GEM_CPU_PREP,
&req, sizeof(req));
if (ret == 0)
nvbo->access = 0;
return ret;
}
drm_public int
nouveau_bo_map(struct nouveau_bo *bo, uint32_t access,
struct nouveau_client *client)
{
struct nouveau_drm *drm = nouveau_drm(&bo->device->object);
struct nouveau_bo_priv *nvbo = nouveau_bo(bo);
if (bo->map == NULL) {
bo->map = drm_mmap(0, bo->size, PROT_READ | PROT_WRITE,
MAP_SHARED, drm->fd, nvbo->map_handle);
if (bo->map == MAP_FAILED) {
bo->map = NULL;
return -errno;
}
}
return nouveau_bo_wait(bo, access, client);
}