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drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering

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Details of the problem, and solution, are in comments in the commit
proper.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-10-02 10:30:34 +10:00
parent 002d0c735c
commit 7234d0230e
2 changed files with 38 additions and 16 deletions
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16
drivers/gpu/drm/nouveau/core/include/core/device.h
View File

@ -8,11 +8,23 @@
enum nv_subdev_type {
NVDEV_SUBDEV_DEVICE,
NVDEV_SUBDEV_VBIOS,
/* All subdevs from DEVINIT to DEVINIT_LAST will be created before
* *any* of them are initialised. This subdev category is used
* for any subdevs that the VBIOS init table parsing may call out
* to during POST.
*/
NVDEV_SUBDEV_DEVINIT,
NVDEV_SUBDEV_GPIO,
NVDEV_SUBDEV_I2C,
NVDEV_SUBDEV_CLOCK,
NVDEV_SUBDEV_DEVINIT_LAST = NVDEV_SUBDEV_CLOCK,
/* This grouping of subdevs are initialised right after they've
* been created, and are allowed to assume any subdevs in the
* list above them exist and have been initialised.
*/
NVDEV_SUBDEV_MXM,
NVDEV_SUBDEV_DEVINIT,
NVDEV_SUBDEV_MC,
NVDEV_SUBDEV_TIMER,
NVDEV_SUBDEV_FB,
@ -23,6 +35,7 @@ enum nv_subdev_type {
NVDEV_SUBDEV_BAR,
NVDEV_SUBDEV_VOLT,
NVDEV_SUBDEV_THERM,
NVDEV_ENGINE_DMAOBJ,
NVDEV_ENGINE_FIFO,
NVDEV_ENGINE_SW,
@ -38,6 +51,7 @@ enum nv_subdev_type {
NVDEV_ENGINE_UNK1C1,
NVDEV_ENGINE_VENC,
NVDEV_ENGINE_DISP,
NVDEV_SUBDEV_NR,
};

34
drivers/gpu/drm/nouveau/core/subdev/device/base.c
View File

@ -96,14 +96,13 @@ nouveau_devobj_ctor(struct nouveau_object *parent,
struct nouveau_object **pobject)
{
struct nouveau_client *client = nv_client(parent);
struct nouveau_object *subdev = NULL;
struct nouveau_device *device;
struct nouveau_devobj *devobj;
struct nv_device_class *args = data;
u64 disable, boot0, strap;
u64 mmio_base, mmio_size;
void __iomem *map;
int ret, i;
int ret, i, c;
if (size < sizeof(struct nv_device_class))
return -EINVAL;
@ -234,34 +233,43 @@ nouveau_devobj_ctor(struct nouveau_object *parent,
}
/* ensure requested subsystems are available for use */
for (i = 0; i < NVDEV_SUBDEV_NR; i++) {
for (i = 0, c = 0; i < NVDEV_SUBDEV_NR; i++) {
if (!(oclass = device->oclass[i]) || (disable & (1ULL << i)))
continue;
if (!device->subdev[i]) {
ret = nouveau_object_ctor(nv_object(device), NULL,
oclass, NULL, i, &subdev);
oclass, NULL, i,
&devobj->subdev[i]);
if (ret == -ENODEV)
continue;
if (ret)
return ret;
if (nv_iclass(subdev, NV_ENGINE_CLASS))
nouveau_subdev_reset(subdev);
if (nv_iclass(devobj->subdev[i], NV_ENGINE_CLASS))
nouveau_subdev_reset(devobj->subdev[i]);
} else {
nouveau_object_ref(device->subdev[i], &subdev);
nouveau_object_ref(device->subdev[i],
&devobj->subdev[i]);
}
if (!nv_iclass(subdev, NV_ENGINE_CLASS)) {
/* note: can't init *any* subdevs until devinit has been run
* due to not knowing exactly what the vbios init tables will
* mess with. devinit also can't be run until all of its
* dependencies have been created.
*
* this code delays init of any subdev until all of devinit's
* dependencies have been created, and then initialises each
* subdev in turn as they're created.
*/
while (i >= NVDEV_SUBDEV_DEVINIT_LAST && c <= i) {
struct nouveau_object *subdev = devobj->subdev[c++];
if (subdev && !nv_iclass(subdev, NV_ENGINE_CLASS)) {
ret = nouveau_object_inc(subdev);
if (ret) {
nouveau_object_ref(NULL, &subdev);
if (ret)
return ret;
}
}
nouveau_object_ref(subdev, &devobj->subdev[i]);
nouveau_object_ref(NULL, &subdev);
}
return 0;