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drm/nouveau/core/client: allow creation of subclients 

We want a supervisor client of NVKM (such as the DRM) to be able to
allow sharing of resources (such as memory objects) between clients.

To allow this, the supervisor creates all its clients as children of
itself, and will use an upcoming ioctl to permit sharing.

Currently it's not possible for indirect clients to use subclients.
Supporting this will require an additional field in the main ioctl.
This isn't important currently, but will need to be fixed for virt.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
hifive-unleashed-5.1
Ben Skeggs 2016-05-22 20:35:16 +10:00
parent 7c413feb7f
commit 04b8867758
9 changed files with 140 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/nouveau/include/nvif/client.h
View File

@ -11,8 +11,7 @@ struct nvif_client {
bool super;
};
int nvif_client_init(const char *drv, const char *name, u64 device,
const char *cfg, const char *dbg,
int nvif_client_init(struct nvif_client *parent, const char *name, u64 device,
struct nvif_client *);
void nvif_client_fini(struct nvif_client *);
int nvif_client_ioctl(struct nvif_client *, void *, u32);

6
drivers/gpu/drm/nouveau/include/nvif/driver.h
View File

@ -1,5 +1,7 @@
#ifndef __NVIF_DRIVER_H__
#define __NVIF_DRIVER_H__
#include <nvif/os.h>
struct nvif_client;
struct nvif_driver {
const char *name;
@ -14,9 +16,11 @@ struct nvif_driver {
bool keep;
};
int nvif_driver_init(const char *drv, const char *cfg, const char *dbg,
const char *name, u64 device, struct nvif_client *);
extern const struct nvif_driver nvif_driver_nvkm;
extern const struct nvif_driver nvif_driver_drm;
extern const struct nvif_driver nvif_driver_lib;
extern const struct nvif_driver nvif_driver_null;
#endif

7
drivers/gpu/drm/nouveau/include/nvif/if0000.h
View File

@ -1,6 +1,13 @@
#ifndef __NVIF_IF0000_H__
#define __NVIF_IF0000_H__
struct nvif_client_v0 {
__u8 version;
__u8 pad01[7];
__u64 device;
char name[32];
};
#define NVIF_CLIENT_V0_DEVLIST 0x00
struct nvif_client_devlist_v0 {

1
drivers/gpu/drm/nouveau/include/nvkm/core/client.h
View File

@ -23,6 +23,7 @@ int nvkm_client_new(const char *name, u64 device, const char *cfg,
const char *dbg,
int (*)(const void *, u32, const void *, u32),
struct nvkm_client **);
struct nvkm_client *nvkm_client_search(struct nvkm_client *, u64 handle);
int nvkm_client_notify_new(struct nvkm_object *, struct nvkm_event *,
void *data, u32 size);

6
drivers/gpu/drm/nouveau/nouveau_drm.c
View File

@ -37,6 +37,8 @@
#include <core/pci.h>
#include <core/tegra.h>
#include <nvif/driver.h>
#include <nvif/class.h>
#include <nvif/cl0002.h>
#include <nvif/cla06f.h>
@ -119,8 +121,8 @@ nouveau_cli_create(struct drm_device *dev, const char *sname,
snprintf(cli->name, sizeof(cli->name), "%s", sname);
cli->dev = dev;
ret = nvif_client_init(NULL, cli->name, nouveau_name(dev),
nouveau_config, nouveau_debug,
ret = nvif_driver_init(NULL, nouveau_config, nouveau_debug,
cli->name, nouveau_name(dev),
&cli->base);
if (ret == 0) {
mutex_init(&cli->mutex);

1
drivers/gpu/drm/nouveau/nvif/Kbuild
View File

@ -1,4 +1,5 @@
nvif-y := nvif/object.o
nvif-y += nvif/client.o
nvif-y += nvif/device.o
nvif-y += nvif/driver.o
nvif-y += nvif/notify.o

43
drivers/gpu/drm/nouveau/nvif/client.c
View File

@ -26,6 +26,9 @@
#include <nvif/driver.h>
#include <nvif/ioctl.h>
#include <nvif/class.h>
#include <nvif/if0000.h>
int
nvif_client_ioctl(struct nvif_client *client, void *data, u32 size)
{
@ -55,29 +58,21 @@ nvif_client_fini(struct nvif_client *client)
}
}
static const struct nvif_driver *
nvif_drivers[] = {
#ifdef __KERNEL__
&nvif_driver_nvkm,
#else
&nvif_driver_drm,
&nvif_driver_lib,
&nvif_driver_null,
#endif
NULL
};
int
nvif_client_init(const char *driver, const char *name, u64 device,
const char *cfg, const char *dbg, struct nvif_client *client)
nvif_client_init(struct nvif_client *parent, const char *name, u64 device,
struct nvif_client *client)
{
struct nvif_client_v0 args = { .device = device };
struct {
struct nvif_ioctl_v0 ioctl;
struct nvif_ioctl_nop_v0 nop;
} args = {};
int ret, i;
} nop = {};
int ret;
ret = nvif_object_init(NULL, 0, 0, NULL, 0, &client->object);
strncpy(args.name, name, sizeof(args.name));
ret = nvif_object_init(parent != client ? &parent->object : NULL,
0, NVIF_CLASS_CLIENT, &args, sizeof(args),
&client->object);
if (ret)
return ret;
@ -85,19 +80,11 @@ nvif_client_init(const char *driver, const char *name, u64 device,
client->object.handle = ~0;
client->route = NVIF_IOCTL_V0_ROUTE_NVIF;
client->super = true;
for (i = 0, ret = -EINVAL; (client->driver = nvif_drivers[i]); i++) {
if (!driver || !strcmp(client->driver->name, driver)) {
ret = client->driver->init(name, device, cfg, dbg,
&client->object.priv);
if (!ret || driver)
break;
}
}
client->driver = parent->driver;
if (ret == 0) {
ret = nvif_client_ioctl(client, &args, sizeof(args));
client->version = args.nop.version;
ret = nvif_client_ioctl(client, &nop, sizeof(nop));
client->version = nop.nop.version;
}
if (ret)

58
drivers/gpu/drm/nouveau/nvif/driver.c 100644
View File

@ -0,0 +1,58 @@
/*
* Copyright 2016 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 <nvif/driver.h>
#include <nvif/client.h>
static const struct nvif_driver *
nvif_driver[] = {
#ifdef __KERNEL__
&nvif_driver_nvkm,
#else
&nvif_driver_drm,
&nvif_driver_lib,
&nvif_driver_null,
#endif
NULL
};
int
nvif_driver_init(const char *drv, const char *cfg, const char *dbg,
const char *name, u64 device, struct nvif_client *client)
{
int ret = -EINVAL, i;
for (i = 0; (client->driver = nvif_driver[i]); i++) {
if (!drv || !strcmp(client->driver->name, drv)) {
ret = client->driver->init(name, device, cfg, dbg,
&client->object.priv);
if (ret == 0)
break;
client->driver->fini(client->object.priv);
}
}
if (ret == 0)
ret = nvif_client_init(client, name, device, client);
return ret;
}

50
drivers/gpu/drm/nouveau/nvkm/core/client.c
View File

@ -31,9 +31,41 @@
#include <nvif/if0000.h>
#include <nvif/unpack.h>
static const struct nvkm_sclass
static int
nvkm_uclient_new(const struct nvkm_oclass *oclass, void *argv, u32 argc,
struct nvkm_object **pobject)
{
union {
struct nvif_client_v0 v0;
} *args = argv;
struct nvkm_client *client;
int ret = -ENOSYS;
if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))){
args->v0.name[sizeof(args->v0.name) - 1] = 0;
ret = nvkm_client_new(args->v0.name, args->v0.device, NULL,
NULL, oclass->client->ntfy, &client);
if (ret)
return ret;
} else
return ret;
client->object.client = oclass->client;
client->object.handle = oclass->handle;
client->object.route = oclass->route;
client->object.token = oclass->token;
client->object.object = oclass->object;
client->debug = oclass->client->debug;
*pobject = &client->object;
return 0;
}
const struct nvkm_sclass
nvkm_uclient_sclass = {
.oclass = NVIF_CLASS_CLIENT,
.minver = 0,
.maxver = 0,
.ctor = nvkm_uclient_new,
};
struct nvkm_client_notify {
@ -143,6 +175,19 @@ nvkm_client_notify_new(struct nvkm_object *object,
return ret;
}
static const struct nvkm_object_func nvkm_client;
struct nvkm_client *
nvkm_client_search(struct nvkm_client *client, u64 handle)
{
struct nvkm_object *object;
object = nvkm_object_search(client, handle, &nvkm_client);
if (IS_ERR(object))
return (void *)object;
return nvkm_client(object);
}
static int
nvkm_client_mthd_devlist(struct nvkm_client *client, void *data, u32 size)
{
@ -196,7 +241,8 @@ nvkm_client_child_get(struct nvkm_object *object, int index,
const struct nvkm_sclass *sclass;
switch (index) {
case 0: sclass = &nvkm_udevice_sclass; break;
case 0: sclass = &nvkm_uclient_sclass; break;
case 1: sclass = &nvkm_udevice_sclass; break;
default:
return -EINVAL;
}