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      1 /*	$NetBSD: nouveau_nvif.c,v 1.6 2021/12/18 23:45:32 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 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 /*******************************************************************************
     28  * NVIF client driver - NVKM directly linked
     29  ******************************************************************************/
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvif.c,v 1.6 2021/12/18 23:45:32 riastradh Exp $");
     33 
     34 #include <core/client.h>
     35 #include <core/notify.h>
     36 #include <core/ioctl.h>
     37 
     38 #include <nvif/client.h>
     39 #include <nvif/driver.h>
     40 #include <nvif/notify.h>
     41 #include <nvif/event.h>
     42 #include <nvif/ioctl.h>
     43 
     44 #include "nouveau_drv.h"
     45 #include "nouveau_usif.h"
     46 
     47 #ifdef __NetBSD__
     48 #define	__iomem	__nvif_iomem
     49 static int
     50 nvkm_client_map(void *priv, bus_space_tag_t tag, u64 busaddr, u32 size,
     51     bus_space_handle_t *handlep, void __iomem **ptrp)
     52 {
     53 	struct nvkm_client *client = nvxx_client(priv);
     54 	int ret;
     55 
     56 	if (tag == client->mmiot &&
     57 	    client->mmioaddr <= busaddr &&
     58 	    busaddr - client->mmioaddr <= client->mmiosz) {
     59 		const bus_size_t offset = busaddr - client->mmioaddr;
     60 		if (size > client->mmiosz - offset) {
     61 			DRM_ERROR("Invalid register access\n");
     62 			return -EFAULT;
     63 		}
     64 		ret = -bus_space_subregion(client->mmiot, client->mmioh,
     65 		    offset, size, handlep);
     66 		if (ret)
     67 			return ret;
     68 		*ptrp = bus_space_vaddr(tag, *handlep);
     69 		return 0;
     70 	}
     71 
     72 	ret = -bus_space_map(tag, busaddr, size, BUS_SPACE_MAP_LINEAR,
     73 	    handlep);
     74 	if (ret)
     75 		return ret;
     76 	*ptrp = bus_space_vaddr(tag, *handlep);
     77 	return 0;
     78 }
     79 
     80 static void
     81 nvkm_client_unmap(void *priv, bus_space_tag_t tag, bus_space_handle_t handle,
     82     bus_addr_t busaddr, void __iomem *ptr, u32 size)
     83 {
     84 	struct nvkm_client *client = nvxx_client(priv);
     85 
     86 	KASSERTMSG(ptr == bus_space_vaddr(tag, handle),
     87 	    "nvkm_client ptr %p != %p [bus_space_vaddr(%p, %"PRIxVADDR")]",
     88 	    ptr, bus_space_vaddr(tag, handle), tag, handle);
     89 
     90 	if (tag == client->mmiot &&
     91 	    client->mmioaddr <= busaddr &&
     92 	    busaddr - client->mmioaddr <= client->mmiosz) {
     93 		__diagused const bus_size_t offset = busaddr - client->mmioaddr;
     94 		KASSERT(size <= client->mmiosz - offset);
     95 		/* Nothing to do to release a subregion.  */
     96 		return;
     97 	}
     98 
     99 	bus_space_unmap(tag, handle, size);
    100 }
    101 #else
    102 static void
    103 nvkm_client_unmap(void *priv, void __iomem *ptr, u32 size)
    104 {
    105 	iounmap(ptr);
    106 }
    107 
    108 static void __iomem *
    109 nvkm_client_map(void *priv, u64 handle, u32 size)
    110 {
    111 	return ioremap(handle, size);
    112 }
    113 #endif
    114 
    115 static int
    116 nvkm_client_ioctl(void *priv, bool super, void *data, u32 size, void **hack)
    117 {
    118 	return nvkm_ioctl(priv, super, data, size, hack);
    119 }
    120 
    121 static int
    122 nvkm_client_resume(void *priv)
    123 {
    124 	struct nvkm_client *client = priv;
    125 	return nvkm_object_init(&client->object);
    126 }
    127 
    128 static int
    129 nvkm_client_suspend(void *priv)
    130 {
    131 	struct nvkm_client *client = priv;
    132 	return nvkm_object_fini(&client->object, true);
    133 }
    134 
    135 static int
    136 nvkm_client_ntfy(const void *header, u32 length, const void *data, u32 size)
    137 {
    138 	const union {
    139 		struct nvif_notify_req_v0 v0;
    140 	} *args = header;
    141 	u8 route;
    142 
    143 	if (length == sizeof(args->v0) && args->v0.version == 0) {
    144 		route = args->v0.route;
    145 	} else {
    146 		WARN_ON(1);
    147 		return NVKM_NOTIFY_DROP;
    148 	}
    149 
    150 	switch (route) {
    151 	case NVDRM_NOTIFY_NVIF:
    152 		return nvif_notify(header, length, data, size);
    153 	case NVDRM_NOTIFY_USIF:
    154 		return usif_notify(header, length, data, size);
    155 	default:
    156 		WARN_ON(1);
    157 		break;
    158 	}
    159 
    160 	return NVKM_NOTIFY_DROP;
    161 }
    162 
    163 static int
    164 nvkm_client_driver_init(const char *name, u64 device, const char *cfg,
    165 			const char *dbg, void **ppriv)
    166 {
    167 	return nvkm_client_new(name, device, cfg, dbg, nvkm_client_ntfy,
    168 			       (struct nvkm_client **)ppriv);
    169 }
    170 
    171 const struct nvif_driver
    172 nvif_driver_nvkm = {
    173 	.name = "nvkm",
    174 	.init = nvkm_client_driver_init,
    175 	.suspend = nvkm_client_suspend,
    176 	.resume = nvkm_client_resume,
    177 	.ioctl = nvkm_client_ioctl,
    178 	.map = nvkm_client_map,
    179 	.unmap = nvkm_client_unmap,
    180 	.keep = false,
    181 };
    182