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      1 /*	$NetBSD: nouveau_nvkm_subdev_mmu_vmmtu102.c,v 1.2 2021/12/18 23:45:41 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2018 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 #include <sys/cdefs.h>
     25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_mmu_vmmtu102.c,v 1.2 2021/12/18 23:45:41 riastradh Exp $");
     26 
     27 #include "vmm.h"
     28 
     29 #include <subdev/timer.h>
     30 
     31 static void
     32 tu102_vmm_flush(struct nvkm_vmm *vmm, int depth)
     33 {
     34 	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
     35 	struct nvkm_device *device = subdev->device;
     36 	u32 type = depth << 24; /*XXX: not confirmed */
     37 
     38 	type = 0x00000001; /* PAGE_ALL */
     39 	if (atomic_read(&vmm->engref[NVKM_SUBDEV_BAR]))
     40 		type |= 0x00000004; /* HUB_ONLY */
     41 
     42 	mutex_lock(&subdev->mutex);
     43 
     44 	nvkm_wr32(device, 0xb830a0, vmm->pd->pt[0]->addr >> 8);
     45 	nvkm_wr32(device, 0xb830a4, 0x00000000);
     46 	nvkm_wr32(device, 0x100e68, 0x00000000);
     47 	nvkm_wr32(device, 0xb830b0, 0x80000000 | type);
     48 
     49 	nvkm_msec(device, 2000,
     50 		if (!(nvkm_rd32(device, 0xb830b0) & 0x80000000))
     51 			break;
     52 	);
     53 
     54 	mutex_unlock(&subdev->mutex);
     55 }
     56 
     57 static const struct nvkm_vmm_func
     58 tu102_vmm = {
     59 	.join = gv100_vmm_join,
     60 	.part = gf100_vmm_part,
     61 	.aper = gf100_vmm_aper,
     62 	.valid = gp100_vmm_valid,
     63 	.flush = tu102_vmm_flush,
     64 	.mthd = gp100_vmm_mthd,
     65 	.page = {
     66 		{ 47, &gp100_vmm_desc_16[4], NVKM_VMM_PAGE_Sxxx },
     67 		{ 38, &gp100_vmm_desc_16[3], NVKM_VMM_PAGE_Sxxx },
     68 		{ 29, &gp100_vmm_desc_16[2], NVKM_VMM_PAGE_Sxxx },
     69 		{ 21, &gp100_vmm_desc_16[1], NVKM_VMM_PAGE_SVxC },
     70 		{ 16, &gp100_vmm_desc_16[0], NVKM_VMM_PAGE_SVxC },
     71 		{ 12, &gp100_vmm_desc_12[0], NVKM_VMM_PAGE_SVHx },
     72 		{}
     73 	}
     74 };
     75 
     76 int
     77 tu102_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
     78 	      void *argv, u32 argc, struct lock_class_key *key,
     79 	      const char *name, struct nvkm_vmm **pvmm)
     80 {
     81 	return gp100_vmm_new_(&tu102_vmm, mmu, managed, addr, size,
     82 			      argv, argc, key, name, pvmm);
     83 }
     84