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      1 /*	$NetBSD: nouveau_nvif_client.c,v 1.3 2021/12/18 23:45:33 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs <bskeggs (at) redhat.com>
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvif_client.c,v 1.3 2021/12/18 23:45:33 riastradh Exp $");
     29 
     30 #include <nvif/client.h>
     31 #include <nvif/driver.h>
     32 #include <nvif/ioctl.h>
     33 
     34 #include <nvif/class.h>
     35 #include <nvif/if0000.h>
     36 
     37 int
     38 nvif_client_ioctl(struct nvif_client *client, void *data, u32 size)
     39 {
     40 	return client->driver->ioctl(client->object.priv, client->super, data, size, NULL);
     41 }
     42 
     43 int
     44 nvif_client_suspend(struct nvif_client *client)
     45 {
     46 	return client->driver->suspend(client->object.priv);
     47 }
     48 
     49 int
     50 nvif_client_resume(struct nvif_client *client)
     51 {
     52 	return client->driver->resume(client->object.priv);
     53 }
     54 
     55 void
     56 nvif_client_fini(struct nvif_client *client)
     57 {
     58 	nvif_object_fini(&client->object);
     59 	if (client->driver) {
     60 		if (client->driver->fini)
     61 			client->driver->fini(client->object.priv);
     62 		client->driver = NULL;
     63 	}
     64 }
     65 
     66 int
     67 nvif_client_init(struct nvif_client *parent, const char *name, u64 device,
     68 		 struct nvif_client *client)
     69 {
     70 	struct nvif_client_v0 args = { .device = device };
     71 	struct {
     72 		struct nvif_ioctl_v0 ioctl;
     73 		struct nvif_ioctl_nop_v0 nop;
     74 	} nop = {};
     75 	int ret;
     76 
     77 	strncpy(args.name, name, sizeof(args.name));
     78 	ret = nvif_object_init(parent != client ? &parent->object : NULL,
     79 			       0, NVIF_CLASS_CLIENT, &args, sizeof(args),
     80 			       &client->object);
     81 	if (ret)
     82 		return ret;
     83 
     84 	client->object.client = client;
     85 	client->object.handle = ~0;
     86 	client->route = NVIF_IOCTL_V0_ROUTE_NVIF;
     87 	client->super = true;
     88 	client->driver = parent->driver;
     89 
     90 	if (ret == 0) {
     91 		ret = nvif_client_ioctl(client, &nop, sizeof(nop));
     92 		client->version = nop.nop.version;
     93 	}
     94 
     95 	if (ret)
     96 		nvif_client_fini(client);
     97 	return ret;
     98 }
     99