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      1 /*	$NetBSD: nouveau_nvkm_subdev_fb_ramgm200.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2017 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 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramgm200.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $");
     28 
     29 #include "ram.h"
     30 
     31 u32
     32 gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
     33 			   struct nvkm_device *device, int fbp, int *pltcs)
     34 {
     35 	u32 ltcs  = nvkm_rd32(device, 0x022450);
     36 	u32 fbpas = nvkm_rd32(device, 0x022458);
     37 	u32 fbpa  = fbp * fbpas;
     38 	u32 size  = 0;
     39 	if (!(nvkm_rd32(device, 0x021d38) & BIT(fbp))) {
     40 		u32 ltco = nvkm_rd32(device, 0x021d70 + (fbp * 4));
     41 		u32 ltcm = ~ltco & ((1 << ltcs) - 1);
     42 
     43 		while (fbpas--) {
     44 			if (!(fbpao & (1 << fbpa)))
     45 				size += func->probe_fbpa_amount(device, fbpa);
     46 			fbpa++;
     47 		}
     48 
     49 		*pltcs = hweight32(ltcm);
     50 	}
     51 	return size;
     52 }
     53 
     54 static const struct nvkm_ram_func
     55 gm200_ram = {
     56 	.upper = 0x1000000000ULL,
     57 	.probe_fbp = gm107_ram_probe_fbp,
     58 	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
     59 	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
     60 	.dtor = gk104_ram_dtor,
     61 	.init = gk104_ram_init,
     62 	.calc = gk104_ram_calc,
     63 	.prog = gk104_ram_prog,
     64 	.tidy = gk104_ram_tidy,
     65 };
     66 
     67 int
     68 gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
     69 {
     70 	return gk104_ram_new_(&gm200_ram, fb, pram);
     71 }
     72