drm/nouveau/mmu/nv44: implement new vmm backend (6ce51352) · Commits · jan.koester / Linux

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/nv44.c

+3 −141

Original line number	Diff line number	Diff line
		@@ -24,150 +24,16 @@
		#include "vmm.h"

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

		#include <nvif/class.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)
		{
		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, vma->vm->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, vma->vm->null, list, pte, cnt);
		nvkm_done(pgt);
		}

		static void
		nv44_vm_unmap(struct nvkm_vma vma, struct nvkm_memory pgt, u32 pte, u32 cnt)
		{
		nvkm_kmap(pgt);
		if (pte & 3) {
		u32 max = 4 - (pte & 3);
		u32 part = (cnt > max) ? max : cnt;
		nv44_vm_fill(pgt, vma->vm->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, vma->vm->null, NULL, pte, cnt);
		nvkm_done(pgt);
		}

		static void
		nv44_vm_flush(struct nvkm_vm *vm)
		{
		struct nvkm_device *device = vm->mmu->subdev.device;
		nvkm_wr32(device, 0x100814, vm->mmu->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 *mmu)
		{
		mmu->vmm->pgt[0].mem[0] = mmu->vmm->pd->pt[0]->memory;
		mmu->vmm->pgt[0].refcount[0] = 1;
		return 0;
		}

		static void
		nv44_mmu_init(struct nvkm_mmu *mmu)
		{
		struct nvkm_device *device = mmu->subdev.device;
		struct nvkm_memory *gart = mmu->vmm->pgt[0].mem[0];
		struct nvkm_memory *pt = mmu->vmm->pd->pt[0]->memory;
		u32 addr;

		/* calculate vram address of this PRAMIN block, object must be
		@@ -175,11 +41,11 @@ nv44_mmu_init(struct nvkm_mmu *mmu)
		* of 512KiB for this to work correctly
		*/
		addr = nvkm_rd32(device, 0x10020c);
		addr -= ((nvkm_memory_addr(gart) >> 19) + 1) << 19;
		addr -= ((nvkm_memory_addr(pt) >> 19) + 1) << 19;

		nvkm_wr32(device, 0x100850, 0x80000000);
		nvkm_wr32(device, 0x100818, mmu->vmm->null);
		nvkm_wr32(device, 0x100804, NV44_GART_SIZE);
		nvkm_wr32(device, 0x100804, (nvkm_memory_size(pt) / 4) * 4096);
		nvkm_wr32(device, 0x100850, 0x00008000);
		nvkm_mask(device, 0x10008c, 0x00000200, 0x00000200);
		nvkm_wr32(device, 0x100820, 0x00000000);
		@@ -189,16 +55,12 @@ nv44_mmu_init(struct nvkm_mmu *mmu)

		static const struct nvkm_mmu_func
		nv44_mmu = {
		.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,
		.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV04}, nv44_vmm_new, true },
		};

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv44.c

+165 −0

Original line number	Diff line number	Diff line
		@@ -21,8 +21,158 @@
		*/
		#include "vmm.h"

		#include <subdev/timer.h>

		static void
		nv44_vmm_pgt_fill(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
		dma_addr_t *list, u32 ptei, u32 ptes)
		{
		u32 pteo = (ptei << 2) & ~0x0000000f;
		u32 tmp[4];

		tmp[0] = nvkm_ro32(pt->memory, pteo + 0x0);
		tmp[1] = nvkm_ro32(pt->memory, pteo + 0x4);
		tmp[2] = nvkm_ro32(pt->memory, pteo + 0x8);
		tmp[3] = nvkm_ro32(pt->memory, pteo + 0xc);

		while (ptes--) {
		u32 addr = (list ? *list++ : vmm->null) >> 12;
		switch (ptei++ & 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;
		}
		}

		VMM_WO032(pt, vmm, pteo + 0x0, tmp[0]);
		VMM_WO032(pt, vmm, pteo + 0x4, tmp[1]);
		VMM_WO032(pt, vmm, pteo + 0x8, tmp[2]);
		VMM_WO032(pt, vmm, pteo + 0xc, tmp[3] \| 0x40000000);
		}

		static void
		nv44_vmm_pgt_pte(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
		u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
		{
		dma_addr_t tmp[4], i;

		if (ptei & 3) {
		const u32 pten = min(ptes, 4 - (ptei & 3));
		for (i = 0; i < pten; i++, addr += 0x1000)
		tmp[i] = addr;
		nv44_vmm_pgt_fill(vmm, pt, tmp, ptei, pten);
		ptei += pten;
		ptes -= pten;
		}

		while (ptes >= 4) {
		for (i = 0; i < 4; i++, addr += 0x1000)
		tmp[i] = addr >> 12;
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[0] >> 0 \| tmp[1] << 27);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[1] >> 5 \| tmp[2] << 22);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[2] >> 10 \| tmp[3] << 17);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[3] >> 15 \| 0x40000000);
		ptes -= 4;
		}

		if (ptes) {
		for (i = 0; i < ptes; i++, addr += 0x1000)
		tmp[i] = addr;
		nv44_vmm_pgt_fill(vmm, pt, tmp, ptei, ptes);
		}
		}

		static void
		nv44_vmm_pgt_sgl(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
		u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
		{
		VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv44_vmm_pgt_pte);
		}

		static void
		nv44_vmm_pgt_dma(struct nvkm_vmm vmm, struct nvkm_mmu_pt pt,
		u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
		{
		#if PAGE_SHIFT == 12
		nvkm_kmap(pt->memory);
		if (ptei & 3) {
		const u32 pten = min(ptes, 4 - (ptei & 3));
		nv44_vmm_pgt_fill(vmm, pt, map->dma, ptei, pten);
		ptei += pten;
		ptes -= pten;
		map->dma += pten;
		}

		while (ptes >= 4) {
		u32 tmp[4], i;
		for (i = 0; i < 4; i++)
		tmp[i] = *map->dma++ >> 12;
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[0] >> 0 \| tmp[1] << 27);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[1] >> 5 \| tmp[2] << 22);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[2] >> 10 \| tmp[3] << 17);
		VMM_WO032(pt, vmm, ptei++ * 4, tmp[3] >> 15 \| 0x40000000);
		ptes -= 4;
		}

		if (ptes) {
		nv44_vmm_pgt_fill(vmm, pt, map->dma, ptei, ptes);
		map->dma += ptes;
		}
		nvkm_done(pt->memory);
		#else
		VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv44_vmm_pgt_pte);
		#endif
		}

		static void
		nv44_vmm_pgt_unmap(struct nvkm_vmm *vmm,
		struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
		{
		nvkm_kmap(pt->memory);
		if (ptei & 3) {
		const u32 pten = min(ptes, 4 - (ptei & 3));
		nv44_vmm_pgt_fill(vmm, pt, NULL, ptei, pten);
		ptei += pten;
		ptes -= pten;
		}

		while (ptes > 4) {
		VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
		VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
		VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
		VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
		ptes -= 4;
		}

		if (ptes)
		nv44_vmm_pgt_fill(vmm, pt, NULL, ptei, ptes);
		nvkm_done(pt->memory);
		}

		static const struct nvkm_vmm_desc_func
		nv44_vmm_desc_pgt = {
		.unmap = nv44_vmm_pgt_unmap,
		.dma = nv44_vmm_pgt_dma,
		.sgl = nv44_vmm_pgt_sgl,
		};

		static const struct nvkm_vmm_desc
		@@ -31,8 +181,23 @@ nv44_vmm_desc_12[] = {
		{}
		};

		static void
		nv44_vmm_flush(struct nvkm_vmm *vmm, int level)
		{
		struct nvkm_device *device = vmm->mmu->subdev.device;
		nvkm_wr32(device, 0x100814, vmm->limit - 4096);
		nvkm_wr32(device, 0x100808, 0x000000020);
		nvkm_msec(device, 2000,
		if (nvkm_rd32(device, 0x100808) & 0x00000001)
		break;
		);
		nvkm_wr32(device, 0x100808, 0x00000000);
		}

		static const struct nvkm_vmm_func
		nv44_vmm = {
		.valid = nv04_vmm_valid,
		.flush = nv44_vmm_flush,
		.page = {
		{ 12, &nv44_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
		{}