drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv44.c - linux-imx - Git at Google

 /*
  * Copyright 2012 Red Hat Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: Ben Skeggs
  */
 #include "nv04.h"

 #include <core/gpuobj.h>
 #include <core/option.h>
 #include <subdev/timer.h>

 #define NV44_GART_SIZE (512 * 1024 * 1024)
 #define NV44_GART_PAGE (  4 * 1024)

 /*******************************************************************************
  * VM map/unmap callbacks
  ******************************************************************************/

 static void
 nv44_vm_fill(struct nvkm_memory *pgt, dma_addr_t null,
 	     dma_addr_t *list, u32 pte, u32 cnt)
 {
 	u32 base = (pte << 2) & ~0x0000000f;
 	u32 tmp[4];

 	tmp[0] = nvkm_ro32(pgt, base + 0x0);
 	tmp[1] = nvkm_ro32(pgt, base + 0x4);
 	tmp[2] = nvkm_ro32(pgt, base + 0x8);
 	tmp[3] = nvkm_ro32(pgt, base + 0xc);

 	while (cnt--) {
 		u32 addr = list ? (*list++ >> 12) : (null >> 12);
 		switch (pte++ & 0x3) {
 		case 0:
 			tmp[0] &= ~0x07ffffff;
 			tmp[0] |= addr;
 			break;
 		case 1:
 			tmp[0] &= ~0xf8000000;
 			tmp[0] |= addr << 27;
 			tmp[1] &= ~0x003fffff;
 			tmp[1] |= addr >> 5;
 			break;
 		case 2:
 			tmp[1] &= ~0xffc00000;
 			tmp[1] |= addr << 22;
 			tmp[2] &= ~0x0001ffff;
 			tmp[2] |= addr >> 10;
 			break;
 		case 3:
 			tmp[2] &= ~0xfffe0000;
 			tmp[2] |= addr << 17;
 			tmp[3] &= ~0x00000fff;
 			tmp[3] |= addr >> 15;
 			break;
 		}
 	}

 	nvkm_wo32(pgt, base + 0x0, tmp[0]);
 	nvkm_wo32(pgt, base + 0x4, tmp[1]);
 	nvkm_wo32(pgt, base + 0x8, tmp[2]);
 	nvkm_wo32(pgt, base + 0xc, tmp[3] | 0x40000000);
 }

 static void
 nv44_vm_map_sg(struct nvkm_vma *vma, struct nvkm_memory *pgt,
 	       struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list)
 {
 	struct nv04_mmu *mmu = nv04_mmu(vma->vm->mmu);
 	u32 tmp[4];
 	int i;

 	nvkm_kmap(pgt);
 	if (pte & 3) {
 		u32  max = 4 - (pte & 3);
 		u32 part = (cnt > max) ? max : cnt;
 		nv44_vm_fill(pgt, mmu->null, list, pte, part);
 		pte  += part;
 		list += part;
 		cnt  -= part;
 	}

 	while (cnt >= 4) {
 		for (i = 0; i < 4; i++)
 			tmp[i] = *list++ >> 12;
 		nvkm_wo32(pgt, pte++ * 4, tmp[0] >>  0 | tmp[1] << 27);
 		nvkm_wo32(pgt, pte++ * 4, tmp[1] >>  5 | tmp[2] << 22);
 		nvkm_wo32(pgt, pte++ * 4, tmp[2] >> 10 | tmp[3] << 17);
 		nvkm_wo32(pgt, pte++ * 4, tmp[3] >> 15 | 0x40000000);
 		cnt -= 4;
 	}

 	if (cnt)
 		nv44_vm_fill(pgt, mmu->null, list, pte, cnt);
 	nvkm_done(pgt);
 }

 static void
 nv44_vm_unmap(struct nvkm_vma *vma, struct nvkm_memory *pgt, u32 pte, u32 cnt)
 {
 	struct nv04_mmu *mmu = nv04_mmu(vma->vm->mmu);

 	nvkm_kmap(pgt);
 	if (pte & 3) {
 		u32  max = 4 - (pte & 3);
 		u32 part = (cnt > max) ? max : cnt;
 		nv44_vm_fill(pgt, mmu->null, NULL, pte, part);
 		pte  += part;
 		cnt  -= part;
 	}

 	while (cnt >= 4) {
 		nvkm_wo32(pgt, pte++ * 4, 0x00000000);
 		nvkm_wo32(pgt, pte++ * 4, 0x00000000);
 		nvkm_wo32(pgt, pte++ * 4, 0x00000000);
 		nvkm_wo32(pgt, pte++ * 4, 0x00000000);
 		cnt -= 4;
 	}

 	if (cnt)
 		nv44_vm_fill(pgt, mmu->null, NULL, pte, cnt);
 	nvkm_done(pgt);
 }

 static void
 nv44_vm_flush(struct nvkm_vm *vm)
 {
 	struct nv04_mmu *mmu = nv04_mmu(vm->mmu);
 	struct nvkm_device *device = mmu->base.subdev.device;
 	nvkm_wr32(device, 0x100814, mmu->base.limit - NV44_GART_PAGE);
 	nvkm_wr32(device, 0x100808, 0x00000020);
 	nvkm_msec(device, 2000,
 		if (nvkm_rd32(device, 0x100808) & 0x00000001)
 			break;
 	);
 	nvkm_wr32(device, 0x100808, 0x00000000);
 }

 /*******************************************************************************
  * MMU subdev
  ******************************************************************************/

 static int
 nv44_mmu_oneinit(struct nvkm_mmu *base)
 {
 	struct nv04_mmu *mmu = nv04_mmu(base);
 	struct nvkm_device *device = mmu->base.subdev.device;
 	int ret;

 	mmu->nullp = dma_alloc_coherent(device->dev, 16 * 1024,
 					&mmu->null, GFP_KERNEL);
 	if (!mmu->nullp) {
 		nvkm_warn(&mmu->base.subdev, "unable to allocate dummy pages\n");
 		mmu->null = 0;
 	}

 	ret = nvkm_vm_create(&mmu->base, 0, NV44_GART_SIZE, 0, 4096, NULL,
 			     &mmu->vm);
 	if (ret)
 		return ret;

 	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
 			      (NV44_GART_SIZE / NV44_GART_PAGE) * 4,
 			      512 * 1024, true,
 			      &mmu->vm->pgt[0].mem[0]);
 	mmu->vm->pgt[0].refcount[0] = 1;
 	return ret;
 }

 static void
 nv44_mmu_init(struct nvkm_mmu *base)
 {
 	struct nv04_mmu *mmu = nv04_mmu(base);
 	struct nvkm_device *device = mmu->base.subdev.device;
 	struct nvkm_memory *gart = mmu->vm->pgt[0].mem[0];
 	u32 addr;

 	/* calculate vram address of this PRAMIN block, object must be
 	 * allocated on 512KiB alignment, and not exceed a total size
 	 * of 512KiB for this to work correctly
 	 */
 	addr  = nvkm_rd32(device, 0x10020c);
 	addr -= ((nvkm_memory_addr(gart) >> 19) + 1) << 19;

 	nvkm_wr32(device, 0x100850, 0x80000000);
 	nvkm_wr32(device, 0x100818, mmu->null);
 	nvkm_wr32(device, 0x100804, NV44_GART_SIZE);
 	nvkm_wr32(device, 0x100850, 0x00008000);
 	nvkm_mask(device, 0x10008c, 0x00000200, 0x00000200);
 	nvkm_wr32(device, 0x100820, 0x00000000);
 	nvkm_wr32(device, 0x10082c, 0x00000001);
 	nvkm_wr32(device, 0x100800, addr | 0x00000010);
 }

 static const struct nvkm_mmu_func
 nv44_mmu = {
 	.dtor = nv04_mmu_dtor,
 	.oneinit = nv44_mmu_oneinit,
 	.init = nv44_mmu_init,
 	.limit = NV44_GART_SIZE,
 	.dma_bits = 39,
 	.pgt_bits = 32 - 12,
 	.spg_shift = 12,
 	.lpg_shift = 12,
 	.map_sg = nv44_vm_map_sg,
 	.unmap = nv44_vm_unmap,
 	.flush = nv44_vm_flush,
 };

 int
 nv44_mmu_new(struct nvkm_device *device, int index, struct nvkm_mmu **pmmu)
 {
 	if (device->type == NVKM_DEVICE_AGP ||
 	    !nvkm_boolopt(device->cfgopt, "NvPCIE", true))
 		return nv04_mmu_new(device, index, pmmu);

 	return nv04_mmu_new_(&nv44_mmu, device, index, pmmu);
 }
	/*
	* Copyright 2012 Red Hat Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: Ben Skeggs
	*/
	#include "nv04.h"

	#include <core/gpuobj.h>
	#include <core/option.h>
	#include <subdev/timer.h>

	#define NV44_GART_SIZE (512 * 1024 * 1024)
	#define NV44_GART_PAGE ( 4 * 1024)

	/*******************************************************************************
	* VM map/unmap callbacks
	******************************************************************************/

	static void
	nv44_vm_fill(struct nvkm_memory *pgt, dma_addr_t null,
	dma_addr_t *list, u32 pte, u32 cnt)
	{
	u32 base = (pte << 2) & ~0x0000000f;
	u32 tmp[4];

	tmp[0] = nvkm_ro32(pgt, base + 0x0);
	tmp[1] = nvkm_ro32(pgt, base + 0x4);
	tmp[2] = nvkm_ro32(pgt, base + 0x8);
	tmp[3] = nvkm_ro32(pgt, base + 0xc);

	while (cnt--) {
	u32 addr = list ? (*list++ >> 12) : (null >> 12);
	switch (pte++ & 0x3) {
	case 0:
	tmp[0] &= ~0x07ffffff;
	tmp[0] \|= addr;
	break;
	case 1:
	tmp[0] &= ~0xf8000000;
	tmp[0] \|= addr << 27;
	tmp[1] &= ~0x003fffff;
	tmp[1] \|= addr >> 5;
	break;
	case 2:
	tmp[1] &= ~0xffc00000;
	tmp[1] \|= addr << 22;
	tmp[2] &= ~0x0001ffff;
	tmp[2] \|= addr >> 10;
	break;
	case 3:
	tmp[2] &= ~0xfffe0000;
	tmp[2] \|= addr << 17;
	tmp[3] &= ~0x00000fff;
	tmp[3] \|= addr >> 15;
	break;
	}
	}

	nvkm_wo32(pgt, base + 0x0, tmp[0]);
	nvkm_wo32(pgt, base + 0x4, tmp[1]);
	nvkm_wo32(pgt, base + 0x8, tmp[2]);
	nvkm_wo32(pgt, base + 0xc, tmp[3] \| 0x40000000);
	}

	static void
	nv44_vm_map_sg(struct nvkm_vma vma, struct nvkm_memory pgt,
	struct nvkm_mem mem, u32 pte, u32 cnt, dma_addr_t list)
	{
	struct nv04_mmu *mmu = nv04_mmu(vma->vm->mmu);
	u32 tmp[4];
	int i;

	nvkm_kmap(pgt);
	if (pte & 3) {
	u32 max = 4 - (pte & 3);
	u32 part = (cnt > max) ? max : cnt;
	nv44_vm_fill(pgt, mmu->null, list, pte, part);
	pte += part;
	list += part;
	cnt -= part;
	}

	while (cnt >= 4) {
	for (i = 0; i < 4; i++)
	tmp[i] = *list++ >> 12;
	nvkm_wo32(pgt, pte++ * 4, tmp[0] >> 0 \| tmp[1] << 27);
	nvkm_wo32(pgt, pte++ * 4, tmp[1] >> 5 \| tmp[2] << 22);
	nvkm_wo32(pgt, pte++ * 4, tmp[2] >> 10 \| tmp[3] << 17);
	nvkm_wo32(pgt, pte++ * 4, tmp[3] >> 15 \| 0x40000000);
	cnt -= 4;
	}

	if (cnt)
	nv44_vm_fill(pgt, mmu->null, list, pte, cnt);
	nvkm_done(pgt);
	}

	static void
	nv44_vm_unmap(struct nvkm_vma vma, struct nvkm_memory pgt, u32 pte, u32 cnt)
	{
	struct nv04_mmu *mmu = nv04_mmu(vma->vm->mmu);

	nvkm_kmap(pgt);
	if (pte & 3) {
	u32 max = 4 - (pte & 3);
	u32 part = (cnt > max) ? max : cnt;
	nv44_vm_fill(pgt, mmu->null, NULL, pte, part);
	pte += part;
	cnt -= part;
	}

	while (cnt >= 4) {
	nvkm_wo32(pgt, pte++ * 4, 0x00000000);
	nvkm_wo32(pgt, pte++ * 4, 0x00000000);
	nvkm_wo32(pgt, pte++ * 4, 0x00000000);
	nvkm_wo32(pgt, pte++ * 4, 0x00000000);
	cnt -= 4;
	}

	if (cnt)
	nv44_vm_fill(pgt, mmu->null, NULL, pte, cnt);
	nvkm_done(pgt);
	}

	static void
	nv44_vm_flush(struct nvkm_vm *vm)
	{
	struct nv04_mmu *mmu = nv04_mmu(vm->mmu);
	struct nvkm_device *device = mmu->base.subdev.device;
	nvkm_wr32(device, 0x100814, mmu->base.limit - NV44_GART_PAGE);
	nvkm_wr32(device, 0x100808, 0x00000020);
	nvkm_msec(device, 2000,
	if (nvkm_rd32(device, 0x100808) & 0x00000001)
	break;
	);
	nvkm_wr32(device, 0x100808, 0x00000000);
	}

	/*******************************************************************************
	* MMU subdev
	******************************************************************************/

	static int
	nv44_mmu_oneinit(struct nvkm_mmu *base)
	{
	struct nv04_mmu *mmu = nv04_mmu(base);
	struct nvkm_device *device = mmu->base.subdev.device;
	int ret;

	mmu->nullp = dma_alloc_coherent(device->dev, 16 * 1024,
	&mmu->null, GFP_KERNEL);
	if (!mmu->nullp) {
	nvkm_warn(&mmu->base.subdev, "unable to allocate dummy pages\n");
	mmu->null = 0;
	}

	ret = nvkm_vm_create(&mmu->base, 0, NV44_GART_SIZE, 0, 4096, NULL,
	&mmu->vm);
	if (ret)
	return ret;

	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
	(NV44_GART_SIZE / NV44_GART_PAGE) * 4,
	512 * 1024, true,
	&mmu->vm->pgt[0].mem[0]);
	mmu->vm->pgt[0].refcount[0] = 1;
	return ret;
	}

	static void
	nv44_mmu_init(struct nvkm_mmu *base)
	{
	struct nv04_mmu *mmu = nv04_mmu(base);
	struct nvkm_device *device = mmu->base.subdev.device;
	struct nvkm_memory *gart = mmu->vm->pgt[0].mem[0];
	u32 addr;

	/* calculate vram address of this PRAMIN block, object must be
	* allocated on 512KiB alignment, and not exceed a total size
	* of 512KiB for this to work correctly
	*/
	addr = nvkm_rd32(device, 0x10020c);
	addr -= ((nvkm_memory_addr(gart) >> 19) + 1) << 19;

	nvkm_wr32(device, 0x100850, 0x80000000);
	nvkm_wr32(device, 0x100818, mmu->null);
	nvkm_wr32(device, 0x100804, NV44_GART_SIZE);
	nvkm_wr32(device, 0x100850, 0x00008000);
	nvkm_mask(device, 0x10008c, 0x00000200, 0x00000200);
	nvkm_wr32(device, 0x100820, 0x00000000);
	nvkm_wr32(device, 0x10082c, 0x00000001);
	nvkm_wr32(device, 0x100800, addr \| 0x00000010);
	}

	static const struct nvkm_mmu_func
	nv44_mmu = {
	.dtor = nv04_mmu_dtor,
	.oneinit = nv44_mmu_oneinit,
	.init = nv44_mmu_init,
	.limit = NV44_GART_SIZE,
	.dma_bits = 39,
	.pgt_bits = 32 - 12,
	.spg_shift = 12,
	.lpg_shift = 12,
	.map_sg = nv44_vm_map_sg,
	.unmap = nv44_vm_unmap,
	.flush = nv44_vm_flush,
	};

	int
	nv44_mmu_new(struct nvkm_device device, int index, struct nvkm_mmu *pmmu)
	{
	if (device->type == NVKM_DEVICE_AGP \|\|
	!nvkm_boolopt(device->cfgopt, "NvPCIE", true))
	return nv04_mmu_new(device, index, pmmu);

	return nv04_mmu_new_(&nv44_mmu, device, index, pmmu);
	}