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      1 /*	$NetBSD: nouveau_nvkm_engine_dma_usergf119.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 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
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_dma_usergf119.c,v 1.3 2021/12/18 23:45:35 riastradh Exp $");
     28 
     29 #define gf119_dmaobj(p) container_of((p), struct gf119_dmaobj, base)
     30 #include "user.h"
     31 
     32 #include <core/client.h>
     33 #include <core/gpuobj.h>
     34 #include <subdev/fb.h>
     35 
     36 #include <nvif/cl0002.h>
     37 #include <nvif/unpack.h>
     38 
     39 struct gf119_dmaobj {
     40 	struct nvkm_dmaobj base;
     41 	u32 flags0;
     42 };
     43 
     44 static int
     45 gf119_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
     46 		  int align, struct nvkm_gpuobj **pgpuobj)
     47 {
     48 	struct gf119_dmaobj *dmaobj = gf119_dmaobj(base);
     49 	struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device;
     50 	int ret;
     51 
     52 	ret = nvkm_gpuobj_new(device, 24, align, false, parent, pgpuobj);
     53 	if (ret == 0) {
     54 		nvkm_kmap(*pgpuobj);
     55 		nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0);
     56 		nvkm_wo32(*pgpuobj, 0x04, dmaobj->base.start >> 8);
     57 		nvkm_wo32(*pgpuobj, 0x08, dmaobj->base.limit >> 8);
     58 		nvkm_wo32(*pgpuobj, 0x0c, 0x00000000);
     59 		nvkm_wo32(*pgpuobj, 0x10, 0x00000000);
     60 		nvkm_wo32(*pgpuobj, 0x14, 0x00000000);
     61 		nvkm_done(*pgpuobj);
     62 	}
     63 
     64 	return ret;
     65 }
     66 
     67 static const struct nvkm_dmaobj_func
     68 gf119_dmaobj_func = {
     69 	.bind = gf119_dmaobj_bind,
     70 };
     71 
     72 int
     73 gf119_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
     74 		 void *data, u32 size, struct nvkm_dmaobj **pdmaobj)
     75 {
     76 	union {
     77 		struct gf119_dma_v0 v0;
     78 	} *args;
     79 	struct nvkm_object *parent = oclass->parent;
     80 	struct gf119_dmaobj *dmaobj;
     81 	u32 kind, page;
     82 	int ret;
     83 
     84 	if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL)))
     85 		return -ENOMEM;
     86 	*pdmaobj = &dmaobj->base;
     87 
     88 	ret = nvkm_dmaobj_ctor(&gf119_dmaobj_func, dma, oclass,
     89 			       &data, &size, &dmaobj->base);
     90 	if (ret)
     91 		return ret;
     92 
     93 	ret  = -ENOSYS;
     94 	args = data;
     95 
     96 	nvif_ioctl(parent, "create gf119 dma size %d\n", size);
     97 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
     98 		nvif_ioctl(parent,
     99 			   "create gf100 dma vers %d page %d kind %02x\n",
    100 			   args->v0.version, args->v0.page, args->v0.kind);
    101 		kind = args->v0.kind;
    102 		page = args->v0.page;
    103 	} else
    104 	if (size == 0) {
    105 		if (dmaobj->base.target != NV_MEM_TARGET_VM) {
    106 			kind = GF119_DMA_V0_KIND_PITCH;
    107 			page = GF119_DMA_V0_PAGE_SP;
    108 		} else {
    109 			kind = GF119_DMA_V0_KIND_VM;
    110 			page = GF119_DMA_V0_PAGE_LP;
    111 		}
    112 	} else
    113 		return ret;
    114 
    115 	if (page > 1)
    116 		return -EINVAL;
    117 	dmaobj->flags0 = (kind << 20) | (page << 6);
    118 
    119 	switch (dmaobj->base.target) {
    120 	case NV_MEM_TARGET_VRAM:
    121 		dmaobj->flags0 |= 0x00000009;
    122 		break;
    123 	case NV_MEM_TARGET_VM:
    124 	case NV_MEM_TARGET_PCI:
    125 	case NV_MEM_TARGET_PCI_NOSNOOP:
    126 		/* XXX: don't currently know how to construct a real one
    127 		 *      of these.  we only use them to represent pushbufs
    128 		 *      on these chipsets, and the classes that use them
    129 		 *      deal with the target themselves.
    130 		 */
    131 		break;
    132 	default:
    133 		return -EINVAL;
    134 	}
    135 
    136 	return 0;
    137 }
    138