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      1 /*	$NetBSD: nouveau_nvkm_subdev_mmu_nv44.c,v 1.5 2021/12/18 23:45:41 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_subdev_mmu_nv44.c,v 1.5 2021/12/18 23:45:41 riastradh Exp $");
     28 
     29 #include "mem.h"
     30 #include "vmm.h"
     31 
     32 #include <core/option.h>
     33 
     34 #include <nvif/class.h>
     35 
     36 static void
     37 nv44_mmu_init(struct nvkm_mmu *mmu)
     38 {
     39 	struct nvkm_device *device = mmu->subdev.device;
     40 	struct nvkm_memory *pt = mmu->vmm->pd->pt[0]->memory;
     41 	u32 addr;
     42 
     43 	/* calculate vram address of this PRAMIN block, object must be
     44 	 * allocated on 512KiB alignment, and not exceed a total size
     45 	 * of 512KiB for this to work correctly
     46 	 */
     47 	addr  = nvkm_rd32(device, 0x10020c);
     48 	addr -= ((nvkm_memory_addr(pt) >> 19) + 1) << 19;
     49 
     50 	nvkm_wr32(device, 0x100850, 0x80000000);
     51 	nvkm_wr32(device, 0x100818, mmu->vmm->null);
     52 	nvkm_wr32(device, 0x100804, (nvkm_memory_size(pt) / 4) * 4096);
     53 	nvkm_wr32(device, 0x100850, 0x00008000);
     54 	nvkm_mask(device, 0x10008c, 0x00000200, 0x00000200);
     55 	nvkm_wr32(device, 0x100820, 0x00000000);
     56 	nvkm_wr32(device, 0x10082c, 0x00000001);
     57 	nvkm_wr32(device, 0x100800, addr | 0x00000010);
     58 }
     59 
     60 static const struct nvkm_mmu_func
     61 nv44_mmu = {
     62 	.init = nv44_mmu_init,
     63 	.dma_bits = 39,
     64 	.mmu = {{ -1, -1, NVIF_CLASS_MMU_NV04}},
     65 	.mem = {{ -1, -1, NVIF_CLASS_MEM_NV04}, nv04_mem_new, nv04_mem_map },
     66 	.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV04}, nv44_vmm_new, true },
     67 };
     68 
     69 int
     70 nv44_mmu_new(struct nvkm_device *device, int index, struct nvkm_mmu **pmmu)
     71 {
     72 	if (device->type == NVKM_DEVICE_AGP ||
     73 	    !nvkm_boolopt(device->cfgopt, "NvPCIE", true))
     74 		return nv04_mmu_new(device, index, pmmu);
     75 
     76 	return nvkm_mmu_new_(&nv44_mmu, device, index, pmmu);
     77 }
     78