/*
* Copyright 2018 Advanced Micro Devices, Inc.
* All Rights Reserved.
*
* 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
*/
#include <linux/io-64-nonatomic-lo-hi.h>
#include "amdgpu.h"
#include "amdgpu_gmc.h"
#include "amdgpu_ras.h"
#include "amdgpu_xgmi.h"
/**
* amdgpu_gmc_get_pde_for_bo - get the PDE for a BO
*
* @bo: the BO to get the PDE for
* @level: the level in the PD hirarchy
* @addr: resulting addr
* @flags: resulting flags
*
* Get the address and flags to be used for a PDE (Page Directory Entry).
*/
void amdgpu_gmc_get_pde_for_bo(struct amdgpu_bo *bo, int level,
uint64_t *addr, uint64_t *flags)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
switch (bo->tbo.mem.mem_type) {
case TTM_PL_TT:
*addr = bo->tbo.ttm->dma_address[0];
break;
case TTM_PL_VRAM:
*addr = amdgpu_bo_gpu_offset(bo);
break;
default:
*addr = 0;
break;
}
*flags = amdgpu_ttm_tt_pde_flags(bo->tbo.ttm, &bo->tbo.mem);
amdgpu_gmc_get_vm_pde(adev, level, addr, flags);
}
/*
* amdgpu_gmc_pd_addr - return the address of the root directory
*/
uint64_t amdgpu_gmc_pd_addr(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
uint64_t pd_addr;
/* TODO: move that into ASIC specific code */
if (adev->asic_type >= CHIP_VEGA10) {
uint64_t flags = AMDGPU_PTE_VALID;
amdgpu_gmc_get_pde_for_bo(bo, -1, &pd_addr, &flags);
pd_addr |= flags;
} else {
pd_addr = amdgpu_bo_gpu_offset(bo);
}
return pd_addr;
}
/**
* amdgpu_gmc_set_pte_pde - update the page tables using CPU
*
* @adev: amdgpu_device pointer
* @cpu_pt_addr: cpu address of the page table
* @gpu_page_idx: entry in the page table to update
* @addr: dst addr to write into pte/pde
* @flags: access flags
*
* Update the page tables using CPU.
*/
int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void *cpu_pt_addr,
uint32_t gpu_page_idx, uint64_t addr,
uint64_t flags)
{
void __iomem *ptr = (void *)cpu_pt_addr;
uint64_t value;
/*
* The following is for PTE only. GART does not have PDEs.
*/
value = addr & 0x0000FFFFFFFFF000ULL;
value |= flags;
writeq(value, ptr + (gpu_page_idx * 8));
return 0;
}
/**
* amdgpu_gmc_agp_addr - return the address in the AGP address space
*
* @bo: TTM BO which needs the address, must be in GTT domain
*
* Tries to figure out how to access the BO through the AGP aperture. Returns
* AMDGPU_BO_INVALID_OFFSET if that is not possible.
*/
uint64_t amdgpu_gmc_agp_addr(struct ttm_buffer_object *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
if (bo->ttm->num_pages != 1 || bo->ttm->caching == ttm_cached)
return AMDGPU_BO_INVALID_OFFSET;
if (bo->ttm->dma_address[0] + PAGE_SIZE >= adev->gmc.agp_size)
return AMDGPU_BO_INVALID_OFFSET;
return adev->gmc.agp_start + bo->ttm->dma_address[0];
}
/**
* amdgpu_gmc_vram_location - try to find VRAM location
*
* @adev: amdgpu device structure holding all necessary information
* @mc: memory controller structure holding memory information
* @base: base address at which to put VRAM
*
* Function will try to place VRAM at base address provided
* as parameter.
*/
void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc,
u64 base)
{
uint64_t limit = (uint64_t)amdgpu_vram_limit << 20;
mc->vram_start = base;
mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
if (limit && limit < mc->real_vram_size)
mc->real_vram_size = limit;
if (mc->xgmi.num_physical_nodes == 0) {
mc->fb_start = mc->vram_start;
mc->fb_end = mc->vram_end;
}
dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
mc->mc_vram_size >> 20, mc->vram_start,
mc->vram_end, mc->real_vram_size >> 20);
}
/**
* amdgpu_gmc_gart_location - try to find GART location
*
* @adev: amdgpu device structure holding all necessary information
* @mc: memory controller structure holding memory information
*
* Function will place try to place GART before or after VRAM.
*
* If GART size is bigger than space left then we ajust GART size.
* Thus function will never fails.
*/
void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
{
const uint64_t four_gb = 0x100000000ULL;
u64 size_af, size_bf;
/*To avoid the hole, limit the max mc address to AMDGPU_GMC_HOLE_START*/
u64 max_mc_address = min(adev->gmc.mc_mask, AMDGPU_GMC_HOLE_START - 1);
mc->gart_size += adev->pm.smu_prv_buffer_size;
/* VCE doesn't like it when BOs cross a 4GB segment, so align
* the GART base on a 4GB boundary as well.
*/
size_bf = mc->fb_start;
size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb);
if (mc->gart_size > max(size_bf, size_af)) {
dev_warn(adev->dev, "limiting GART\n");
mc->gart_size = max(size_bf, size_af);
}
if ((size_bf >= mc->gart_size && size_bf < size_af) ||
(size_af < mc->gart_size))
mc->gart_start = 0;
else
mc->gart_start = max_mc_address - mc->gart_size + 1;
mc->gart_start &= ~(four_gb - 1);
mc->gart_end = mc->gart_start + mc->gart_size - 1;
dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
mc->gart_size >> 20, mc->gart_start, mc->gart_end);
}
/**
* amdgpu_gmc_agp_location - try to find AGP location
* @adev: amdgpu device structure holding all necessary information
* @mc: memory controller structure holding memory information
*
* Function will place try to find a place for the AGP BAR in the MC address
* space.
*
* AGP BAR will be assigned the largest available hole in the address space.
* Should be called after VRAM and GART locations are setup.
*/
void amdgpu_gmc_agp_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
{
const uint64_t sixteen_gb = 1ULL << 34;
const uint64_t sixteen_gb_mask = ~(sixteen_gb - 1);
u64 size_af, size_bf;
if (amdgpu_sriov_vf(adev)) {
mc->agp_start = 0xffffffffffff;
mc->agp_end = 0x0;
mc->agp_size = 0;
return;
}
if (mc->fb_start > mc->gart_start) {
size_bf = (mc->fb_start & sixteen_gb_mask) -
ALIGN(mc->gart_end + 1, sixteen_gb);
size_af = mc->mc_mask + 1 - ALIGN(mc->fb_end + 1, sixteen_gb);
} else {
size_bf = mc->fb_start & sixteen_gb_mask;
size_af = (mc->gart_start & sixteen_gb_mask) -
ALIGN(mc->fb_end + 1, sixteen_gb);
}
if (size_bf > size_af) {
mc->agp_start = (mc->fb_start - size_bf) & sixteen_gb_mask;
mc->agp_size = size_bf;
} else {
mc->agp_start = ALIGN(mc->fb_end + 1, sixteen_gb);
mc->agp_size = size_af;
}
mc->agp_end = mc->agp_start + mc->agp_size - 1;
dev_info(adev->dev, "AGP: %lluM 0x%016llX - 0x%016llX\n",
mc->agp_size >> 20, mc->agp_start, mc->agp_end);
}
/**
* amdgpu_gmc_filter_faults - filter VM faults
*
* @adev: amdgpu device structure
* @addr: address of the VM fault
* @pasid: PASID of the process causing the fault
* @timestamp: timestamp of the fault
*
* Returns:
* True if the fault was filtered and should not be processed further.
* False if the fault is a new one and needs to be handled.
*/
bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr,
uint16_t pasid, uint64_t timestamp)
{
struct amdgpu_gmc *gmc = &adev->gmc;
uint64_t stamp, key = addr << 4 | pasid;
struct amdgpu_gmc_fault *fault;
uint32_t hash;
/* If we don't have space left in the ring buffer return immediately */
stamp = max(timestamp, AMDGPU_GMC_FAULT_TIMEOUT + 1) -
AMDGPU_GMC_FAULT_TIMEOUT;
if (gmc->fault_ring[gmc->last_fault].timestamp >= stamp)
return true;
/* Try to find the fault in the hash */
hash = hash_64(key, AMDGPU_GMC_FAULT_HASH_ORDER);
fault = &gmc->fault_ring[gmc->fault_hash[hash].idx];
while (fault->timestamp >= stamp) {
uint64_t tmp;
if (fault->key == key)
return true;
tmp = fault->timestamp;
fault = &gmc->fault_ring[fault->next];
/* Check if the entry was reused */
if (fault->timestamp >= tmp)
break;
}
/* Add the fault to the ring */
fault = &gmc->fault_ring[gmc->last_fault];
fault->key = key;
fault->timestamp = timestamp;
/* And update the hash */
fault->next = gmc->fault_hash[hash].idx;
gmc->fault_hash[hash].idx = gmc->last_fault++;
return false;
}
int amdgpu_gmc_ras_late_init(struct amdgpu_device *adev)
{
int r;
if (adev->umc.funcs && adev->umc.funcs->ras_late_init) {
r = adev->umc.funcs->ras_late_init(adev);
if (r)
return r;
}
if (adev->mmhub.funcs && adev->mmhub.funcs->ras_late_init) {
r = adev->mmhub.funcs->ras_late_init(adev);
if (r)
return r;
}
return amdgpu_xgmi_ras_late_init(adev);
}
void amdgpu_gmc_ras_fini(struct amdgpu_device *adev)
{
amdgpu_umc_ras_fini(adev);
amdgpu_mmhub_ras_fini(adev);
amdgpu_xgmi_ras_fini(adev);
}
/*
* The latest engine allocation on gfx9/10 is:
* Engine 2, 3: firmware
* Engine 0, 1, 4~16: amdgpu ring,
* subject to change when ring number changes
* Engine 17: Gart flushes
*/
#define GFXHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
#define MMHUB_FREE_VM_INV_ENGS_BITMAP 0x1FFF3
int amdgpu_gmc_allocate_vm_inv_eng(struct amdgpu_device *adev)
{
struct amdgpu_ring *ring;
unsigned vm_inv_engs[AMDGPU_MAX_VMHUBS] =
{GFXHUB_FREE_VM_INV_ENGS_BITMAP, MMHUB_FREE_VM_INV_ENGS_BITMAP,
GFXHUB_FREE_VM_INV_ENGS_BITMAP};
unsigned i;
unsigned vmhub, inv_eng;
for (i = 0; i < adev->num_rings; ++i) {
ring = adev->rings[i];
vmhub = ring->funcs->vmhub;
if (ring == &adev->mes.ring)
continue;
inv_eng = ffs(vm_inv_engs[vmhub]);
if (!inv_eng) {
dev_err(adev->dev, "no VM inv eng for ring %s\n",
ring->name);
return -EINVAL;
}
ring->vm_inv_eng = inv_eng - 1;
vm_inv_engs[vmhub] &= ~(1 << ring->vm_inv_eng);
dev_info(adev->dev, "ring %s uses VM inv eng %u on hub %u\n",
ring->name, ring->vm_inv_eng, ring->funcs->vmhub);
}
return 0;
}
/**
* amdgpu_tmz_set -- check and set if a device supports TMZ
* @adev: amdgpu_device pointer
*
* Check and set if an the device @adev supports Trusted Memory
* Zones (TMZ).
*/
void amdgpu_gmc_tmz_set(struct amdgpu_device *adev)
{
switch (adev->asic_type) {
case CHIP_RAVEN:
case CHIP_RENOIR:
case CHIP_NAVI10:
case CHIP_NAVI14:
case CHIP_NAVI12:
case CHIP_VANGOGH:
/* Don't enable it by default yet.
*/
if (amdgpu_tmz < 1) {
adev->gmc.tmz_enabled = false;
dev_info(adev->dev,
"Trusted Memory Zone (TMZ) feature disabled as experimental (default)\n");
} else {
adev->gmc.tmz_enabled = true;
dev_info(adev->dev,
"Trusted Memory Zone (TMZ) feature enabled as experimental (cmd line)\n");
}
break;
default:
adev->gmc.tmz_enabled = false;
dev_warn(adev->dev,
"Trusted Memory Zone (TMZ) feature not supported\n");
break;
}
}
/**
* amdgpu_noretry_set -- set per asic noretry defaults
* @adev: amdgpu_device pointer
*
* Set a per asic default for the no-retry parameter.
*
*/
void amdgpu_gmc_noretry_set(struct amdgpu_device *adev)
{
struct amdgpu_gmc *gmc = &adev->gmc;
switch (adev->asic_type) {
case CHIP_VEGA10:
case CHIP_VEGA20:
/*
* noretry = 0 will cause kfd page fault tests fail
* for some ASICs, so set default to 1 for these ASICs.
*/
if (amdgpu_noretry == -1)
gmc->noretry = 1;
else
gmc->noretry = amdgpu_noretry;
break;
case CHIP_RAVEN:
default:
/* Raven currently has issues with noretry
* regardless of what we decide for other
* asics, we should leave raven with
* noretry = 0 until we root cause the
* issues.
*
* default this to 0 for now, but we may want
* to change this in the future for certain
* GPUs as it can increase performance in
* certain cases.
*/
if (amdgpu_noretry == -1)
gmc->noretry = 0;
else
gmc->noretry = amdgpu_noretry;
break;
}
}
void amdgpu_gmc_set_vm_fault_masks(struct amdgpu_device *adev, int hub_type,
bool enable)
{
struct amdgpu_vmhub *hub;
u32 tmp, reg, i;
hub = &adev->vmhub[hub_type];
for (i = 0; i < 16; i++) {
reg = hub->vm_context0_cntl + hub->ctx_distance * i;
tmp = RREG32(reg);
if (enable)
tmp |= hub->vm_cntx_cntl_vm_fault;
else
tmp &= ~hub->vm_cntx_cntl_vm_fault;
WREG32(reg, tmp);
}
}
void amdgpu_gmc_get_vbios_allocations(struct amdgpu_device *adev)
{
unsigned size;
/*
* TODO:
* Currently there is a bug where some memory client outside
* of the driver writes to first 8M of VRAM on S3 resume,
* this overrides GART which by default gets placed in first 8M and
* causes VM_FAULTS once GTT is accessed.
* Keep the stolen memory reservation until the while this is not solved.
*/
switch (adev->asic_type) {
case CHIP_VEGA10:
case CHIP_RAVEN:
case CHIP_RENOIR:
adev->mman.keep_stolen_vga_memory = true;
break;
default:
adev->mman.keep_stolen_vga_memory = false;
break;
}
if (amdgpu_sriov_vf(adev) ||
!amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_DCE)) {
size = 0;
} else {
size = amdgpu_gmc_get_vbios_fb_size(adev);
if (adev->mman.keep_stolen_vga_memory)
size = max(size, (unsigned)AMDGPU_VBIOS_VGA_ALLOCATION);
}
/* set to 0 if the pre-OS buffer uses up most of vram */
if ((adev->gmc.real_vram_size - size) < (8 * 1024 * 1024))
size = 0;
if (size > AMDGPU_VBIOS_VGA_ALLOCATION) {
adev->mman.stolen_vga_size = AMDGPU_VBIOS_VGA_ALLOCATION;
adev->mman.stolen_extended_size = size - adev->mman.stolen_vga_size;
} else {
adev->mman.stolen_vga_size = size;
adev->mman.stolen_extended_size = 0;
}
}
