From a04d04231b490a2dca427a0f04603ed47fdb9cee Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Sun, 10 Aug 2014 04:10:21 +1000 Subject: [PATCH] drm/nouveau/nvif: import library functions for the ioctl/event interfaces This is a wrapper around the interfaces defined in an earlier commit, and is also used by various userspace (either by a libdrm backend, or libpciaccess) tools/tests. In the future this will be extended to handle channels, replacing some long-unloved code we currently use, and allow fifo/display/mpeg (hi Ilia ;)) engines to all be exposed in the same way. Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/Makefile | 6 + drivers/gpu/drm/nouveau/core/core/handle.c | 2 - .../gpu/drm/nouveau/core/include/core/class.h | 2 + drivers/gpu/drm/nouveau/nvif/client.c | 130 +++++++ drivers/gpu/drm/nouveau/nvif/client.h | 39 ++ drivers/gpu/drm/nouveau/nvif/device.c | 78 ++++ drivers/gpu/drm/nouveau/nvif/device.h | 66 ++++ drivers/gpu/drm/nouveau/nvif/driver.h | 20 + drivers/gpu/drm/nouveau/nvif/list.h | 353 ++++++++++++++++++ drivers/gpu/drm/nouveau/nvif/notify.c | 237 ++++++++++++ drivers/gpu/drm/nouveau/nvif/notify.h | 39 ++ drivers/gpu/drm/nouveau/nvif/object.c | 302 +++++++++++++++ drivers/gpu/drm/nouveau/nvif/object.h | 77 ++++ drivers/gpu/drm/nouveau/nvif/os.h | 1 + 14 files changed, 1350 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/nouveau/nvif/client.c create mode 100644 drivers/gpu/drm/nouveau/nvif/client.h create mode 100644 drivers/gpu/drm/nouveau/nvif/device.c create mode 100644 drivers/gpu/drm/nouveau/nvif/device.h create mode 100644 drivers/gpu/drm/nouveau/nvif/driver.h create mode 100644 drivers/gpu/drm/nouveau/nvif/list.h create mode 100644 drivers/gpu/drm/nouveau/nvif/notify.c create mode 100644 drivers/gpu/drm/nouveau/nvif/notify.h create mode 100644 drivers/gpu/drm/nouveau/nvif/object.c create mode 100644 drivers/gpu/drm/nouveau/nvif/object.h create mode 120000 drivers/gpu/drm/nouveau/nvif/os.h diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile index dfab376466a1..3cddb955aad3 100644 --- a/drivers/gpu/drm/nouveau/Makefile +++ b/drivers/gpu/drm/nouveau/Makefile @@ -327,6 +327,12 @@ nouveau-y += core/engine/vp/nv98.o nouveau-y += core/engine/vp/nvc0.o nouveau-y += core/engine/vp/nve0.o +# nvif +nouveau-y += nvif/object.o +nouveau-y += nvif/client.o +nouveau-y += nvif/device.o +nouveau-y += nvif/notify.o + # drm/core nouveau-y += nouveau_drm.o nouveau_chan.o nouveau_dma.o nouveau_fence.o nouveau-y += nouveau_vga.o nouveau_agp.o diff --git a/drivers/gpu/drm/nouveau/core/core/handle.c b/drivers/gpu/drm/nouveau/core/core/handle.c index 734777ce43f4..a490b805d7e3 100644 --- a/drivers/gpu/drm/nouveau/core/core/handle.c +++ b/drivers/gpu/drm/nouveau/core/core/handle.c @@ -146,9 +146,7 @@ nouveau_handle_create(struct nouveau_object *parent, u32 _parent, u32 _handle, } hprintk(handle, TRACE, "created\n"); - *phandle = handle; - return 0; } diff --git a/drivers/gpu/drm/nouveau/core/include/core/class.h b/drivers/gpu/drm/nouveau/core/include/core/class.h index d6fd2cbe4333..37d47cb44a7b 100644 --- a/drivers/gpu/drm/nouveau/core/include/core/class.h +++ b/drivers/gpu/drm/nouveau/core/include/core/class.h @@ -1,6 +1,8 @@ #ifndef __NOUVEAU_CLASS_H__ #define __NOUVEAU_CLASS_H__ +#include + /* Device class * * 0080: NV_DEVICE diff --git a/drivers/gpu/drm/nouveau/nvif/client.c b/drivers/gpu/drm/nouveau/nvif/client.c new file mode 100644 index 000000000000..7048fd91be28 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/client.c @@ -0,0 +1,130 @@ +/* + * Copyright 2013 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 "client.h" +#include "driver.h" +#include "ioctl.h" + +int +nvif_client_ioctl(struct nvif_client *client, void *data, u32 size) +{ + return client->driver->ioctl(client->base.priv, client->super, data, size, NULL); +} + +int +nvif_client_suspend(struct nvif_client *client) +{ + return client->driver->suspend(client->base.priv); +} + +int +nvif_client_resume(struct nvif_client *client) +{ + return client->driver->resume(client->base.priv); +} + +void +nvif_client_fini(struct nvif_client *client) +{ + if (client->driver) { + client->driver->fini(client->base.priv); + client->driver = NULL; + client->base.parent = NULL; + nvif_object_fini(&client->base); + } +} + +const struct nvif_driver * +nvif_drivers[] = { +#ifdef __KERNEL__ +#if 0 + &nvif_driver_nvkm, +#endif +#else + &nvif_driver_lib, +#endif + NULL +}; + +int +nvif_client_init(void (*dtor)(struct nvif_client *), const char *driver, + const char *name, u64 device, const char *cfg, const char *dbg, + struct nvif_client *client) +{ + int ret, i; + + ret = nvif_object_init(NULL, (void*)dtor, 0, 0, NULL, 0, &client->base); + if (ret) + return ret; + + client->base.parent = &client->base; + client->base.handle = ~0; + client->object = &client->base; + 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->base.priv); + if (!ret || driver) + break; + } + } + + if (ret) + nvif_client_fini(client); + return ret; +} + +static void +nvif_client_del(struct nvif_client *client) +{ + nvif_client_fini(client); + kfree(client); +} + +int +nvif_client_new(const char *driver, const char *name, u64 device, + const char *cfg, const char *dbg, + struct nvif_client **pclient) +{ + struct nvif_client *client = kzalloc(sizeof(*client), GFP_KERNEL); + if (client) { + int ret = nvif_client_init(nvif_client_del, driver, name, + device, cfg, dbg, client); + if (ret) { + kfree(client); + client = NULL; + } + *pclient = client; + return ret; + } + return -ENOMEM; +} + +void +nvif_client_ref(struct nvif_client *client, struct nvif_client **pclient) +{ + nvif_object_ref(&client->base, (struct nvif_object **)pclient); +} diff --git a/drivers/gpu/drm/nouveau/nvif/client.h b/drivers/gpu/drm/nouveau/nvif/client.h new file mode 100644 index 000000000000..28352f0882ec --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/client.h @@ -0,0 +1,39 @@ +#ifndef __NVIF_CLIENT_H__ +#define __NVIF_CLIENT_H__ + +#include "object.h" + +struct nvif_client { + struct nvif_object base; + struct nvif_object *object; /*XXX: hack for nvif_object() */ + const struct nvif_driver *driver; + bool super; +}; + +static inline struct nvif_client * +nvif_client(struct nvif_object *object) +{ + while (object && object->parent != object) + object = object->parent; + return (void *)object; +} + +int nvif_client_init(void (*dtor)(struct nvif_client *), const char *, + const char *, u64, const char *, const char *, + struct nvif_client *); +void nvif_client_fini(struct nvif_client *); +int nvif_client_new(const char *, const char *, u64, const char *, + const char *, struct nvif_client **); +void nvif_client_ref(struct nvif_client *, struct nvif_client **); +int nvif_client_ioctl(struct nvif_client *, void *, u32); +int nvif_client_suspend(struct nvif_client *); +int nvif_client_resume(struct nvif_client *); + +/*XXX*/ +#include +#define nvkm_client(a) ({ \ + struct nvif_client *_client = nvif_client(nvif_object(a)); \ + nouveau_client(_client->base.priv); \ +}) + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/device.c b/drivers/gpu/drm/nouveau/nvif/device.c new file mode 100644 index 000000000000..f477579725e3 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/device.c @@ -0,0 +1,78 @@ +/* + * Copyright 2014 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 "device.h" + +void +nvif_device_fini(struct nvif_device *device) +{ + nvif_object_fini(&device->base); +} + +int +nvif_device_init(struct nvif_object *parent, void (*dtor)(struct nvif_device *), + u32 handle, u32 oclass, void *data, u32 size, + struct nvif_device *device) +{ + int ret = nvif_object_init(parent, (void *)dtor, handle, oclass, + data, size, &device->base); + if (ret == 0) { + device->object = &device->base; + device->info.version = 0; + ret = nvif_object_mthd(&device->base, NV_DEVICE_V0_INFO, + &device->info, sizeof(device->info)); + } + return ret; +} + +static void +nvif_device_del(struct nvif_device *device) +{ + nvif_device_fini(device); + kfree(device); +} + +int +nvif_device_new(struct nvif_object *parent, u32 handle, u32 oclass, + void *data, u32 size, struct nvif_device **pdevice) +{ + struct nvif_device *device = kzalloc(sizeof(*device), GFP_KERNEL); + if (device) { + int ret = nvif_device_init(parent, nvif_device_del, handle, + oclass, data, size, device); + if (ret) { + kfree(device); + device = NULL; + } + *pdevice = device; + return ret; + } + return -ENOMEM; +} + +void +nvif_device_ref(struct nvif_device *device, struct nvif_device **pdevice) +{ + nvif_object_ref(&device->base, (struct nvif_object **)pdevice); +} diff --git a/drivers/gpu/drm/nouveau/nvif/device.h b/drivers/gpu/drm/nouveau/nvif/device.h new file mode 100644 index 000000000000..c208bad984b3 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/device.h @@ -0,0 +1,66 @@ +#ifndef __NVIF_DEVICE_H__ +#define __NVIF_DEVICE_H__ + +#include "object.h" +#include "class.h" + +struct nvif_device { + struct nvif_object base; + struct nvif_object *object; /*XXX: hack for nvif_object() */ + struct nv_device_info_v0 info; +}; + +static inline struct nvif_device * +nvif_device(struct nvif_object *object) +{ + while (object && object->oclass != 0x0080 /*XXX: NV_DEVICE_CLASS*/ ) + object = object->parent; + return (void *)object; +} + +int nvif_device_init(struct nvif_object *, void (*dtor)(struct nvif_device *), + u32 handle, u32 oclass, void *, u32, + struct nvif_device *); +void nvif_device_fini(struct nvif_device *); +int nvif_device_new(struct nvif_object *, u32 handle, u32 oclass, + void *, u32, struct nvif_device **); +void nvif_device_ref(struct nvif_device *, struct nvif_device **); + +/*XXX*/ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define nvkm_device(a) nv_device(nvkm_object((a))) +#define nvkm_bios(a) nouveau_bios(nvkm_device(a)) +#define nvkm_fb(a) nouveau_fb(nvkm_device(a)) +#define nvkm_instmem(a) nouveau_instmem(nvkm_device(a)) +#define nvkm_vmmgr(a) nouveau_vmmgr(nvkm_device(a)) +#define nvkm_bar(a) nouveau_bar(nvkm_device(a)) +#define nvkm_gpio(a) nouveau_gpio(nvkm_device(a)) +#define nvkm_clock(a) nouveau_clock(nvkm_device(a)) +#define nvkm_i2c(a) nouveau_i2c(nvkm_device(a)) +#define nvkm_timer(a) nouveau_timer(nvkm_device(a)) +#define nvkm_wait(a,b,c,d) nv_wait(nvkm_timer(a), (b), (c), (d)) +#define nvkm_wait_cb(a,b,c) nv_wait_cb(nvkm_timer(a), (b), (c)) +#define nvkm_therm(a) nouveau_therm(nvkm_device(a)) + +#include +#include +#include +#include +#include + +#define nvkm_fifo(a) nouveau_fifo(nvkm_device(a)) +#define nvkm_fifo_chan(a) ((struct nouveau_fifo_chan *)nvkm_object(a)) +#define nvkm_disp(a) nouveau_disp(nvkm_device(a)) +#define nvkm_gr(a) ((struct nouveau_graph *)nouveau_engine(nvkm_object(a), NVDEV_ENGINE_GR)) + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/driver.h b/drivers/gpu/drm/nouveau/nvif/driver.h new file mode 100644 index 000000000000..ea5b1b880fb6 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/driver.h @@ -0,0 +1,20 @@ +#ifndef __NVIF_DRIVER_H__ +#define __NVIF_DRIVER_H__ + +struct nvif_driver { + const char *name; + int (*init)(const char *name, u64 device, const char *cfg, + const char *dbg, void **priv); + void (*fini)(void *priv); + int (*suspend)(void *priv); + int (*resume)(void *priv); + int (*ioctl)(void *priv, bool super, void *data, u32 size, void **hack); + void *(*map)(void *priv, u64 handle, u32 size); + void (*unmap)(void *priv, void *ptr, u32 size); + bool keep; +}; + +extern const struct nvif_driver nvif_driver_nvkm; +extern const struct nvif_driver nvif_driver_lib; + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/list.h b/drivers/gpu/drm/nouveau/nvif/list.h new file mode 100644 index 000000000000..8af5d144ecb0 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/list.h @@ -0,0 +1,353 @@ +/* + * Copyright © 2010 Intel Corporation + * Copyright © 2010 Francisco Jerez + * + * 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. + * + */ + +/* Modified by Ben Skeggs to match kernel list APIs */ + +#ifndef _XORG_LIST_H_ +#define _XORG_LIST_H_ + +/** + * @file Classic doubly-link circular list implementation. + * For real usage examples of the linked list, see the file test/list.c + * + * Example: + * We need to keep a list of struct foo in the parent struct bar, i.e. what + * we want is something like this. + * + * struct bar { + * ... + * struct foo *list_of_foos; -----> struct foo {}, struct foo {}, struct foo{} + * ... + * } + * + * We need one list head in bar and a list element in all list_of_foos (both are of + * data type 'struct list_head'). + * + * struct bar { + * ... + * struct list_head list_of_foos; + * ... + * } + * + * struct foo { + * ... + * struct list_head entry; + * ... + * } + * + * Now we initialize the list head: + * + * struct bar bar; + * ... + * INIT_LIST_HEAD(&bar.list_of_foos); + * + * Then we create the first element and add it to this list: + * + * struct foo *foo = malloc(...); + * .... + * list_add(&foo->entry, &bar.list_of_foos); + * + * Repeat the above for each element you want to add to the list. Deleting + * works with the element itself. + * list_del(&foo->entry); + * free(foo); + * + * Note: calling list_del(&bar.list_of_foos) will set bar.list_of_foos to an empty + * list again. + * + * Looping through the list requires a 'struct foo' as iterator and the + * name of the field the subnodes use. + * + * struct foo *iterator; + * list_for_each_entry(iterator, &bar.list_of_foos, entry) { + * if (iterator->something == ...) + * ... + * } + * + * Note: You must not call list_del() on the iterator if you continue the + * loop. You need to run the safe for-each loop instead: + * + * struct foo *iterator, *next; + * list_for_each_entry_safe(iterator, next, &bar.list_of_foos, entry) { + * if (...) + * list_del(&iterator->entry); + * } + * + */ + +/** + * The linkage struct for list nodes. This struct must be part of your + * to-be-linked struct. struct list_head is required for both the head of the + * list and for each list node. + * + * Position and name of the struct list_head field is irrelevant. + * There are no requirements that elements of a list are of the same type. + * There are no requirements for a list head, any struct list_head can be a list + * head. + */ +struct list_head { + struct list_head *next, *prev; +}; + +/** + * Initialize the list as an empty list. + * + * Example: + * INIT_LIST_HEAD(&bar->list_of_foos); + * + * @param The list to initialized. + */ +#define LIST_HEAD_INIT(name) { &(name), &(name) } + +#define LIST_HEAD(name) \ + struct list_head name = LIST_HEAD_INIT(name) + +static inline void +INIT_LIST_HEAD(struct list_head *list) +{ + list->next = list->prev = list; +} + +static inline void +__list_add(struct list_head *entry, + struct list_head *prev, struct list_head *next) +{ + next->prev = entry; + entry->next = next; + entry->prev = prev; + prev->next = entry; +} + +/** + * Insert a new element after the given list head. The new element does not + * need to be initialised as empty list. + * The list changes from: + * head → some element → ... + * to + * head → new element → older element → ... + * + * Example: + * struct foo *newfoo = malloc(...); + * list_add(&newfoo->entry, &bar->list_of_foos); + * + * @param entry The new element to prepend to the list. + * @param head The existing list. + */ +static inline void +list_add(struct list_head *entry, struct list_head *head) +{ + __list_add(entry, head, head->next); +} + +/** + * Append a new element to the end of the list given with this list head. + * + * The list changes from: + * head → some element → ... → lastelement + * to + * head → some element → ... → lastelement → new element + * + * Example: + * struct foo *newfoo = malloc(...); + * list_add_tail(&newfoo->entry, &bar->list_of_foos); + * + * @param entry The new element to prepend to the list. + * @param head The existing list. + */ +static inline void +list_add_tail(struct list_head *entry, struct list_head *head) +{ + __list_add(entry, head->prev, head); +} + +static inline void +__list_del(struct list_head *prev, struct list_head *next) +{ + next->prev = prev; + prev->next = next; +} + +/** + * Remove the element from the list it is in. Using this function will reset + * the pointers to/from this element so it is removed from the list. It does + * NOT free the element itself or manipulate it otherwise. + * + * Using list_del on a pure list head (like in the example at the top of + * this file) will NOT remove the first element from + * the list but rather reset the list as empty list. + * + * Example: + * list_del(&foo->entry); + * + * @param entry The element to remove. + */ +static inline void +list_del(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); +} + +static inline void +list_del_init(struct list_head *entry) +{ + __list_del(entry->prev, entry->next); + INIT_LIST_HEAD(entry); +} + +static inline void list_move_tail(struct list_head *list, + struct list_head *head) +{ + __list_del(list->prev, list->next); + list_add_tail(list, head); +} + +/** + * Check if the list is empty. + * + * Example: + * list_empty(&bar->list_of_foos); + * + * @return True if the list contains one or more elements or False otherwise. + */ +static inline bool +list_empty(struct list_head *head) +{ + return head->next == head; +} + +/** + * Returns a pointer to the container of this list element. + * + * Example: + * struct foo* f; + * f = container_of(&foo->entry, struct foo, entry); + * assert(f == foo); + * + * @param ptr Pointer to the struct list_head. + * @param type Data type of the list element. + * @param member Member name of the struct list_head field in the list element. + * @return A pointer to the data struct containing the list head. + */ +#ifndef container_of +#define container_of(ptr, type, member) \ + (type *)((char *)(ptr) - (char *) &((type *)0)->member) +#endif + +/** + * Alias of container_of + */ +#define list_entry(ptr, type, member) \ + container_of(ptr, type, member) + +/** + * Retrieve the first list entry for the given list pointer. + * + * Example: + * struct foo *first; + * first = list_first_entry(&bar->list_of_foos, struct foo, list_of_foos); + * + * @param ptr The list head + * @param type Data type of the list element to retrieve + * @param member Member name of the struct list_head field in the list element. + * @return A pointer to the first list element. + */ +#define list_first_entry(ptr, type, member) \ + list_entry((ptr)->next, type, member) + +/** + * Retrieve the last list entry for the given listpointer. + * + * Example: + * struct foo *first; + * first = list_last_entry(&bar->list_of_foos, struct foo, list_of_foos); + * + * @param ptr The list head + * @param type Data type of the list element to retrieve + * @param member Member name of the struct list_head field in the list element. + * @return A pointer to the last list element. + */ +#define list_last_entry(ptr, type, member) \ + list_entry((ptr)->prev, type, member) + +#define __container_of(ptr, sample, member) \ + (void *)container_of((ptr), typeof(*(sample)), member) + +/** + * Loop through the list given by head and set pos to struct in the list. + * + * Example: + * struct foo *iterator; + * list_for_each_entry(iterator, &bar->list_of_foos, entry) { + * [modify iterator] + * } + * + * This macro is not safe for node deletion. Use list_for_each_entry_safe + * instead. + * + * @param pos Iterator variable of the type of the list elements. + * @param head List head + * @param member Member name of the struct list_head in the list elements. + * + */ +#define list_for_each_entry(pos, head, member) \ + for (pos = __container_of((head)->next, pos, member); \ + &pos->member != (head); \ + pos = __container_of(pos->member.next, pos, member)) + +/** + * Loop through the list, keeping a backup pointer to the element. This + * macro allows for the deletion of a list element while looping through the + * list. + * + * See list_for_each_entry for more details. + */ +#define list_for_each_entry_safe(pos, tmp, head, member) \ + for (pos = __container_of((head)->next, pos, member), \ + tmp = __container_of(pos->member.next, pos, member); \ + &pos->member != (head); \ + pos = tmp, tmp = __container_of(pos->member.next, tmp, member)) + + +#define list_for_each_entry_reverse(pos, head, member) \ + for (pos = __container_of((head)->prev, pos, member); \ + &pos->member != (head); \ + pos = __container_of(pos->member.prev, pos, member)) + +#define list_for_each_entry_continue(pos, head, member) \ + for (pos = __container_of(pos->member.next, pos, member); \ + &pos->member != (head); \ + pos = __container_of(pos->member.next, pos, member)) + +#define list_for_each_entry_continue_reverse(pos, head, member) \ + for (pos = __container_of(pos->member.prev, pos, member); \ + &pos->member != (head); \ + pos = __container_of(pos->member.prev, pos, member)) + +#define list_for_each_entry_from(pos, head, member) \ + for (; \ + &pos->member != (head); \ + pos = __container_of(pos->member.next, pos, member)) + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/notify.c b/drivers/gpu/drm/nouveau/nvif/notify.c new file mode 100644 index 000000000000..7c06123a559c --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/notify.c @@ -0,0 +1,237 @@ +/* + * Copyright 2014 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 +#include +#include +#include +#include +#include + +static inline int +nvif_notify_put_(struct nvif_notify *notify) +{ + struct nvif_object *object = notify->object; + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_ntfy_put_v0 ntfy; + } args = { + .ioctl.type = NVIF_IOCTL_V0_NTFY_PUT, + .ntfy.index = notify->index, + }; + + if (atomic_inc_return(¬ify->putcnt) != 1) + return 0; + + return nvif_object_ioctl(object, &args, sizeof(args), NULL); +} + +int +nvif_notify_put(struct nvif_notify *notify) +{ + if (likely(notify->object) && + test_and_clear_bit(NVIF_NOTIFY_USER, ¬ify->flags)) { + int ret = nvif_notify_put_(notify); + if (test_bit(NVIF_NOTIFY_WORK, ¬ify->flags)) + flush_work(¬ify->work); + return ret; + } + return 0; +} + +static inline int +nvif_notify_get_(struct nvif_notify *notify) +{ + struct nvif_object *object = notify->object; + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_ntfy_get_v0 ntfy; + } args = { + .ioctl.type = NVIF_IOCTL_V0_NTFY_GET, + .ntfy.index = notify->index, + }; + + if (atomic_dec_return(¬ify->putcnt) != 0) + return 0; + + return nvif_object_ioctl(object, &args, sizeof(args), NULL); +} + +int +nvif_notify_get(struct nvif_notify *notify) +{ + if (likely(notify->object) && + !test_and_set_bit(NVIF_NOTIFY_USER, ¬ify->flags)) + return nvif_notify_get_(notify); + return 0; +} + +static void +nvif_notify_work(struct work_struct *work) +{ + struct nvif_notify *notify = container_of(work, typeof(*notify), work); + if (notify->func(notify) == NVIF_NOTIFY_KEEP) + nvif_notify_get_(notify); +} + +int +nvif_notify(const void *header, u32 length, const void *data, u32 size) +{ + struct nvif_notify *notify = NULL; + const union { + struct nvif_notify_rep_v0 v0; + } *args = header; + int ret = NVIF_NOTIFY_DROP; + + if (length == sizeof(args->v0) && args->v0.version == 0) { + if (WARN_ON(args->v0.route)) + return NVIF_NOTIFY_DROP; + notify = (void *)(unsigned long)args->v0.token; + } + + if (!WARN_ON(notify == NULL)) { + struct nvif_client *client = nvif_client(notify->object); + if (!WARN_ON(notify->size != size)) { + if (test_bit(NVIF_NOTIFY_WORK, ¬ify->flags)) { + atomic_inc(¬ify->putcnt); + memcpy((void *)notify->data, data, size); + schedule_work(¬ify->work); + return NVIF_NOTIFY_DROP; + } + notify->data = data; + ret = notify->func(notify); + notify->data = NULL; + if (ret != NVIF_NOTIFY_DROP && client->driver->keep) { + atomic_inc(¬ify->putcnt); + nvif_notify_get_(notify); + } + } + } + + return ret; +} + +int +nvif_notify_fini(struct nvif_notify *notify) +{ + struct nvif_object *object = notify->object; + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_ntfy_del_v0 ntfy; + } args = { + .ioctl.type = NVIF_IOCTL_V0_NTFY_DEL, + .ntfy.index = notify->index, + }; + int ret = nvif_notify_put(notify); + if (ret >= 0 && object) { + ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret == 0) { + nvif_object_ref(NULL, ¬ify->object); + kfree((void *)notify->data); + } + } + return ret; +} + +int +nvif_notify_init(struct nvif_object *object, void (*dtor)(struct nvif_notify *), + int (*func)(struct nvif_notify *), bool work, u8 event, + void *data, u32 size, u32 reply, struct nvif_notify *notify) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_ntfy_new_v0 ntfy; + struct nvif_notify_req_v0 req; + } *args; + int ret = -ENOMEM; + + notify->object = NULL; + nvif_object_ref(object, ¬ify->object); + notify->flags = 0; + atomic_set(¬ify->putcnt, 1); + notify->dtor = dtor; + notify->func = func; + notify->data = NULL; + notify->size = reply; + if (work) { + INIT_WORK(¬ify->work, nvif_notify_work); + set_bit(NVIF_NOTIFY_WORK, ¬ify->flags); + notify->data = kmalloc(notify->size, GFP_KERNEL); + if (!notify->data) + goto done; + } + + if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) + goto done; + args->ioctl.version = 0; + args->ioctl.type = NVIF_IOCTL_V0_NTFY_NEW; + args->ntfy.version = 0; + args->ntfy.event = event; + args->req.version = 0; + args->req.reply = notify->size; + args->req.route = 0; + args->req.token = (unsigned long)(void *)notify; + + memcpy(args->req.data, data, size); + ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); + notify->index = args->ntfy.index; + kfree(args); +done: + if (ret) + nvif_notify_fini(notify); + return ret; +} + +static void +nvif_notify_del(struct nvif_notify *notify) +{ + nvif_notify_fini(notify); + kfree(notify); +} + +void +nvif_notify_ref(struct nvif_notify *notify, struct nvif_notify **pnotify) +{ + BUG_ON(notify != NULL); + if (*pnotify) + (*pnotify)->dtor(*pnotify); + *pnotify = notify; +} + +int +nvif_notify_new(struct nvif_object *object, int (*func)(struct nvif_notify *), + bool work, u8 type, void *data, u32 size, u32 reply, + struct nvif_notify **pnotify) +{ + struct nvif_notify *notify = kzalloc(sizeof(*notify), GFP_KERNEL); + if (notify) { + int ret = nvif_notify_init(object, nvif_notify_del, func, work, + type, data, size, reply, notify); + if (ret) + kfree(notify); + *pnotify = notify; + return ret; + } + return -ENOMEM; +} diff --git a/drivers/gpu/drm/nouveau/nvif/notify.h b/drivers/gpu/drm/nouveau/nvif/notify.h new file mode 100644 index 000000000000..9ebfa3b45e76 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/notify.h @@ -0,0 +1,39 @@ +#ifndef __NVIF_NOTIFY_H__ +#define __NVIF_NOTIFY_H__ + +struct nvif_notify { + struct nvif_object *object; + int index; + +#define NVIF_NOTIFY_USER 0 +#define NVIF_NOTIFY_WORK 1 + unsigned long flags; + atomic_t putcnt; + void (*dtor)(struct nvif_notify *); +#define NVIF_NOTIFY_DROP 0 +#define NVIF_NOTIFY_KEEP 1 + int (*func)(struct nvif_notify *); + + /* this is const for a *very* good reason - the data might be on the + * stack from an irq handler. if you're not nvif/notify.c then you + * should probably think twice before casting it away... + */ + const void *data; + u32 size; + struct work_struct work; +}; + +int nvif_notify_init(struct nvif_object *, void (*dtor)(struct nvif_notify *), + int (*func)(struct nvif_notify *), bool work, u8 type, + void *data, u32 size, u32 reply, struct nvif_notify *); +int nvif_notify_fini(struct nvif_notify *); +int nvif_notify_get(struct nvif_notify *); +int nvif_notify_put(struct nvif_notify *); +int nvif_notify(const void *, u32, const void *, u32); + +int nvif_notify_new(struct nvif_object *, int (*func)(struct nvif_notify *), + bool work, u8 type, void *data, u32 size, u32 reply, + struct nvif_notify **); +void nvif_notify_ref(struct nvif_notify *, struct nvif_notify **); + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/object.c b/drivers/gpu/drm/nouveau/nvif/object.c new file mode 100644 index 000000000000..b0c82206ece2 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/object.c @@ -0,0 +1,302 @@ +/* + * Copyright 2014 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 "object.h" +#include "client.h" +#include "driver.h" +#include "ioctl.h" + +int +nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack) +{ + struct nvif_client *client = nvif_client(object); + union { + struct nvif_ioctl_v0 v0; + } *args = data; + + if (size >= sizeof(*args) && args->v0.version == 0) { + args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY; + args->v0.path_nr = 0; + while (args->v0.path_nr < ARRAY_SIZE(args->v0.path)) { + args->v0.path[args->v0.path_nr++] = object->handle; + if (object->parent == object) + break; + object = object->parent; + } + } else + return -ENOSYS; + + return client->driver->ioctl(client->base.priv, client->super, data, size, hack); +} + +int +nvif_object_sclass(struct nvif_object *object, u32 *oclass, int count) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_sclass_v0 sclass; + } *args; + u32 size = count * sizeof(args->sclass.oclass[0]); + int ret; + + if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) + return -ENOMEM; + args->ioctl.version = 0; + args->ioctl.type = NVIF_IOCTL_V0_SCLASS; + args->sclass.version = 0; + args->sclass.count = count; + + memcpy(args->sclass.oclass, oclass, size); + ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); + ret = ret ? ret : args->sclass.count; + memcpy(oclass, args->sclass.oclass, size); + kfree(args); + return ret; +} + +u32 +nvif_object_rd(struct nvif_object *object, int size, u64 addr) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_rd_v0 rd; + } args = { + .ioctl.type = NVIF_IOCTL_V0_RD, + .rd.size = size, + .rd.addr = addr, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret) { + /*XXX: warn? */ + return 0; + } + return args.rd.data; +} + +void +nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_wr_v0 wr; + } args = { + .ioctl.type = NVIF_IOCTL_V0_WR, + .wr.size = size, + .wr.addr = addr, + .wr.data = data, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret) { + /*XXX: warn? */ + } +} + +int +nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size) +{ + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_mthd_v0 mthd; + } *args; + u8 stack[128]; + int ret; + + if (sizeof(*args) + size > sizeof(stack)) { + if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) + 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 = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL); + memcpy(data, args->mthd.data, size); + if (args != (void *)stack) + kfree(args); + return ret; +} + +void +nvif_object_unmap(struct nvif_object *object) +{ + if (object->map.size) { + struct nvif_client *client = nvif_client(object); + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_unmap unmap; + } args = { + .ioctl.type = NVIF_IOCTL_V0_UNMAP, + }; + + if (object->map.ptr) { + client->driver->unmap(client, object->map.ptr, + object->map.size); + object->map.ptr = NULL; + } + + nvif_object_ioctl(object, &args, sizeof(args), NULL); + object->map.size = 0; + } +} + +int +nvif_object_map(struct nvif_object *object) +{ + struct nvif_client *client = nvif_client(object); + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_map_v0 map; + } args = { + .ioctl.type = NVIF_IOCTL_V0_MAP, + }; + int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (ret == 0) { + object->map.size = args.map.length; + object->map.ptr = client->driver->map(client, args.map.handle, + object->map.size); + if (ret = -ENOMEM, object->map.ptr) + return 0; + nvif_object_unmap(object); + } + return ret; +} + +struct ctor { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_new_v0 new; +}; + +void +nvif_object_fini(struct nvif_object *object) +{ + struct ctor *ctor = container_of(object->data, typeof(*ctor), new.data); + if (object->parent) { + struct { + struct nvif_ioctl_v0 ioctl; + struct nvif_ioctl_del del; + } args = { + .ioctl.type = NVIF_IOCTL_V0_DEL, + }; + + nvif_object_unmap(object); + nvif_object_ioctl(object, &args, sizeof(args), NULL); + if (object->data) { + object->size = 0; + object->data = NULL; + kfree(ctor); + } + nvif_object_ref(NULL, &object->parent); + } +} + +int +nvif_object_init(struct nvif_object *parent, void (*dtor)(struct nvif_object *), + u32 handle, u32 oclass, void *data, u32 size, + struct nvif_object *object) +{ + struct ctor *ctor; + int ret = 0; + + object->parent = NULL; + object->object = object; + nvif_object_ref(parent, &object->parent); + kref_init(&object->refcount); + object->handle = handle; + object->oclass = oclass; + object->data = NULL; + object->size = 0; + object->dtor = dtor; + object->map.ptr = NULL; + object->map.size = 0; + + if (object->parent) { + if (!(ctor = kmalloc(sizeof(*ctor) + size, GFP_KERNEL))) { + nvif_object_fini(object); + return -ENOMEM; + } + object->data = ctor->new.data; + object->size = size; + memcpy(object->data, data, size); + + ctor->ioctl.version = 0; + ctor->ioctl.type = NVIF_IOCTL_V0_NEW; + ctor->new.version = 0; + ctor->new.route = NVIF_IOCTL_V0_ROUTE_NVIF; + ctor->new.token = (unsigned long)(void *)object; + ctor->new.handle = handle; + ctor->new.oclass = oclass; + + ret = nvif_object_ioctl(parent, ctor, sizeof(*ctor) + + object->size, &object->priv); + } + + if (ret) + nvif_object_fini(object); + return ret; +} + +static void +nvif_object_del(struct nvif_object *object) +{ + nvif_object_fini(object); + kfree(object); +} + +int +nvif_object_new(struct nvif_object *parent, u32 handle, u32 oclass, + void *data, u32 size, struct nvif_object **pobject) +{ + struct nvif_object *object = kzalloc(sizeof(*object), GFP_KERNEL); + if (object) { + int ret = nvif_object_init(parent, nvif_object_del, handle, + oclass, data, size, object); + if (ret) + kfree(object); + *pobject = object; + return ret; + } + return -ENOMEM; +} + +static void +nvif_object_put(struct kref *kref) +{ + struct nvif_object *object = + container_of(kref, typeof(*object), refcount); + object->dtor(object); +} + +void +nvif_object_ref(struct nvif_object *object, struct nvif_object **pobject) +{ + if (object) + kref_get(&object->refcount); + if (*pobject) + kref_put(&(*pobject)->refcount, nvif_object_put); + *pobject = object; +} diff --git a/drivers/gpu/drm/nouveau/nvif/object.h b/drivers/gpu/drm/nouveau/nvif/object.h new file mode 100644 index 000000000000..dce62736f542 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/object.h @@ -0,0 +1,77 @@ +#ifndef __NVIF_OBJECT_H__ +#define __NVIF_OBJECT_H__ + +#include + +struct nvif_object { + struct nvif_object *parent; + struct nvif_object *object; /*XXX: hack for nvif_object() */ + struct kref refcount; + u32 handle; + u32 oclass; + void *data; + u32 size; + void *priv; /*XXX: hack */ + void (*dtor)(struct nvif_object *); + struct { + void *ptr; + u32 size; + } map; +}; + +int nvif_object_init(struct nvif_object *, void (*dtor)(struct nvif_object *), + u32 handle, u32 oclass, void *, u32, + struct nvif_object *); +void nvif_object_fini(struct nvif_object *); +int nvif_object_new(struct nvif_object *, u32 handle, u32 oclass, + void *, u32, struct nvif_object **); +void nvif_object_ref(struct nvif_object *, struct nvif_object **); +int nvif_object_ioctl(struct nvif_object *, void *, u32, void **); +int nvif_object_sclass(struct nvif_object *, u32 *, int); +u32 nvif_object_rd(struct nvif_object *, int, u64); +void nvif_object_wr(struct nvif_object *, int, u64, u32); +int nvif_object_mthd(struct nvif_object *, u32, void *, u32); +int nvif_object_map(struct nvif_object *); +void nvif_object_unmap(struct nvif_object *); + +#define nvif_object(a) (a)->object + +#define ioread8_native ioread8 +#define iowrite8_native iowrite8 +#define nvif_rd(a,b,c) ({ \ + struct nvif_object *_object = nvif_object(a); \ + u32 _data; \ + if (likely(_object->map.ptr)) \ + _data = ioread##b##_native((u8 *)_object->map.ptr + (c)); \ + else \ + _data = nvif_object_rd(_object, (b) / 8, (c)); \ + _data; \ +}) +#define nvif_wr(a,b,c,d) ({ \ + struct nvif_object *_object = nvif_object(a); \ + if (likely(_object->map.ptr)) \ + iowrite##b##_native((d), (u8 *)_object->map.ptr + (c)); \ + else \ + nvif_object_wr(_object, (b) / 8, (c), (d)); \ +}) + +#define nvif_rd08(a,b) ({ u8 _v = nvif_rd((a), 8, (b)); _v; }) +#define nvif_rd16(a,b) ({ u16 _v = nvif_rd((a), 16, (b)); _v; }) +#define nvif_rd32(a,b) ({ u32 _v = nvif_rd((a), 32, (b)); _v; }) +#define nvif_wr08(a,b,c) nvif_wr((a), 8, (b), (u8)(c)) +#define nvif_wr16(a,b,c) nvif_wr((a), 16, (b), (u16)(c)) +#define nvif_wr32(a,b,c) nvif_wr((a), 32, (b), (u32)(c)) +#define nvif_mask(a,b,c,d) ({ \ + u32 _v = nvif_rd32(nvif_object(a), (b)); \ + nvif_wr32(nvif_object(a), (b), (_v & ~(c)) | (d)); \ + _v; \ +}) + +#define nvif_mthd(a,b,c,d) nvif_object_mthd(nvif_object(a), (b), (c), (d)) + +/*XXX*/ +#include +#define nvkm_object(a) ((struct nouveau_object *)nvif_object(a)->priv) +#define nvif_exec(a,b,c,d) nv_exec(nvkm_object(a), (b), (c), (d)) + +#endif diff --git a/drivers/gpu/drm/nouveau/nvif/os.h b/drivers/gpu/drm/nouveau/nvif/os.h new file mode 120000 index 000000000000..bd744b2cf5cf --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvif/os.h @@ -0,0 +1 @@ +../core/os.h \ No newline at end of file