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      1 /*	$NetBSD: nouveau_nvkm_subdev_fb_ramgp100.c,v 1.2 2021/12/18 23:45:39 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
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramgp100.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $");
     28 
     29 #include "ram.h"
     30 
     31 #include <subdev/bios.h>
     32 #include <subdev/bios/init.h>
     33 #include <subdev/bios/rammap.h>
     34 
     35 static int
     36 gp100_ram_init(struct nvkm_ram *ram)
     37 {
     38 	struct nvkm_subdev *subdev = &ram->fb->subdev;
     39 	struct nvkm_device *device = subdev->device;
     40 	struct nvkm_bios *bios = device->bios;
     41 	u8  ver, hdr, cnt, len, snr, ssz;
     42 	u32 data;
     43 	int i;
     44 
     45 	/* run a bunch of tables from rammap table.  there's actually
     46 	 * individual pointers for each rammap entry too, but, nvidia
     47 	 * seem to just run the last two entries' scripts early on in
     48 	 * their init, and never again.. we'll just run 'em all once
     49 	 * for now.
     50 	 *
     51 	 * i strongly suspect that each script is for a separate mode
     52 	 * (likely selected by 0x9a065c's lower bits?), and the
     53 	 * binary driver skips the one that's already been setup by
     54 	 * the init tables.
     55 	 */
     56 	data = nvbios_rammapTe(bios, &ver, &hdr, &cnt, &len, &snr, &ssz);
     57 	if (!data || hdr < 0x15)
     58 		return -EINVAL;
     59 
     60 	cnt  = nvbios_rd08(bios, data + 0x14); /* guess at count */
     61 	data = nvbios_rd32(bios, data + 0x10); /* guess u32... */
     62 	if (cnt) {
     63 		u32 save = nvkm_rd32(device, 0x9a065c) & 0x000000f0;
     64 		for (i = 0; i < cnt; i++, data += 4) {
     65 			if (i != save >> 4) {
     66 				nvkm_mask(device, 0x9a065c, 0x000000f0, i << 4);
     67 				nvbios_init(subdev, nvbios_rd32(bios, data));
     68 			}
     69 		}
     70 		nvkm_mask(device, 0x9a065c, 0x000000f0, save);
     71 	}
     72 
     73 	nvkm_mask(device, 0x9a0584, 0x11000000, 0x00000000);
     74 	nvkm_wr32(device, 0x10ecc0, 0xffffffff);
     75 	nvkm_mask(device, 0x9a0160, 0x00000010, 0x00000010);
     76 	return 0;
     77 }
     78 
     79 static u32
     80 gp100_ram_probe_fbpa(struct nvkm_device *device, int fbpa)
     81 {
     82 	return nvkm_rd32(device, 0x90020c + (fbpa * 0x4000));
     83 }
     84 
     85 static const struct nvkm_ram_func
     86 gp100_ram = {
     87 	.upper = 0x1000000000ULL,
     88 	.probe_fbp = gm107_ram_probe_fbp,
     89 	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
     90 	.probe_fbpa_amount = gp100_ram_probe_fbpa,
     91 	.init = gp100_ram_init,
     92 };
     93 
     94 int
     95 gp100_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
     96 {
     97 	struct nvkm_ram *ram;
     98 
     99 	if (!(ram = *pram = kzalloc(sizeof(*ram), GFP_KERNEL)))
    100 		return -ENOMEM;
    101 
    102 	return gf100_ram_ctor(&gp100_ram, fb, ram);
    103 
    104 }
    105