// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( C ) 2013 Red Hat
* Author : Rob Clark < robdclark @ gmail . com >
*
* Copyright ( c ) 2014 The Linux Foundation . All rights reserved .
*/
#include <linux/ascii85.h>
#include <linux/interconnect.h>
#include <linux/firmware/qcom/qcom_scm.h>
#include <linux/kernel.h>
#include <linux/of_reserved_mem.h>
#include <linux/pm_opp.h>
#include <linux/slab.h>
#include <linux/soc/qcom/mdt_loader.h>
#include <linux/nvmem-consumer.h>
#include <soc/qcom/ocmem.h>
#include "adreno_gpu.h"
#include "a6xx_gpu.h"
#include "msm_gem.h"
#include "msm_mmu.h"
static u64 address_space_size = 0 ;
MODULE_PARM_DESC(address_space_size, "Override for size of processes private GPU address space" );
module_param(address_space_size, ullong, 0600 );
static bool zap_available = true ;
static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname,
u32 pasid)
{
struct device *dev = &gpu->pdev->dev;
const struct firmware *fw;
const char *signed_fwname = NULL;
struct device_node *np;
struct resource r;
phys_addr_t mem_phys;
ssize_t mem_size;
void *mem_region = NULL;
int ret;
if (!IS_ENABLED(CONFIG_ARCH_QCOM)) {
zap_available = false ;
return -EINVAL;
}
np = of_get_child_by_name(dev->of_node, "zap-shader" );
if (!of_device_is_available(np)) {
zap_available = false ;
return -ENODEV;
}
ret = of_reserved_mem_region_to_resource(np, 0 , &r);
if (ret) {
zap_available = false ;
return ret;
}
mem_phys = r.start;
/*
* Check for a firmware - name property . This is the new scheme
* to handle firmware that may be signed with device specific
* keys , allowing us to have a different zap fw path for different
* devices .
*
* If the firmware - name property is found , we bypass the
* adreno_request_fw ( ) mechanism , because we don ' t need to handle
* the / lib / firmware / qcom / . . . vs / lib / firmware / . . . case .
*
* If the firmware - name property is not found , for backwards
* compatibility we fall back to the fwname from the gpulist
* table .
*/
of_property_read_string_index(np, "firmware-name" , 0 , &signed_fwname);
if (signed_fwname) {
fwname = signed_fwname;
ret = request_firmware_direct(&fw, fwname, gpu->dev->dev);
if (ret)
fw = ERR_PTR(ret);
} else if (fwname) {
/* Request the MDT file from the default location: */
fw = adreno_request_fw(to_adreno_gpu(gpu), fwname);
} else {
/*
* For new targets , we require the firmware - name property ,
* if a zap - shader is required , rather than falling back
* to a firmware name specified in gpulist .
*
* Because the firmware is signed with a ( potentially )
* device specific key , having the name come from gpulist
* was a bad idea , and is only provided for backwards
* compatibility for older targets .
*/
return -ENOENT;
}
if (IS_ERR(fw)) {
DRM_DEV_ERROR(dev, "Unable to load %s\n" , fwname);
return PTR_ERR(fw);
}
/* Figure out how much memory we need */
mem_size = qcom_mdt_get_size(fw);
if (mem_size < 0 ) {
ret = mem_size;
goto out;
}
if (mem_size > resource_size(&r)) {
DRM_DEV_ERROR(dev,
"memory region is too small to load the MDT\n" );
ret = -E2BIG;
goto out;
}
/* Allocate memory for the firmware image */
mem_region = memremap(mem_phys, mem_size, MEMREMAP_WC);
if (!mem_region) {
ret = -ENOMEM;
goto out;
}
/*
* Load the rest of the MDT
*
* Note that we could be dealing with two different paths , since
* with upstream linux - firmware it would be in a qcom / subdir . .
* adreno_request_fw ( ) handles this , but qcom_mdt_load ( ) does
* not . But since we ' ve already gotten through adreno_request_fw ( )
* we know which of the two cases it is :
*/
if (signed_fwname || (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY)) {
ret = qcom_mdt_load(dev, fw, fwname, pasid,
mem_region, mem_phys, mem_size, NULL);
} else {
char *newname;
newname = kasprintf(GFP_KERNEL, "qcom/%s" , fwname);
ret = qcom_mdt_load(dev, fw, newname, pasid,
mem_region, mem_phys, mem_size, NULL);
kfree(newname);
}
if (ret)
goto out;
/* Send the image to the secure world */
ret = qcom_scm_pas_auth_and_reset(pasid);
/*
* If the scm call returns - EOPNOTSUPP we assume that this target
* doesn ' t need / support the zap shader so quietly fail
*/
if (ret == -EOPNOTSUPP)
zap_available = false ;
else if (ret)
DRM_DEV_ERROR(dev, "Unable to authorize the image\n" );
out:
if (mem_region)
memunmap(mem_region);
release_firmware(fw);
return ret;
}
int adreno_zap_shader_load(struct msm_gpu *gpu, u32 pasid)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct platform_device *pdev = gpu->pdev;
/* Short cut if we determine the zap shader isn't available/needed */
if (!zap_available)
return -ENODEV;
/* We need SCM to be able to load the firmware */
if (!qcom_scm_is_available()) {
DRM_DEV_ERROR(&pdev->dev, "SCM is not available\n" );
return -EPROBE_DEFER;
}
return zap_shader_load_mdt(gpu, adreno_gpu->info->zapfw, pasid);
}
struct drm_gpuvm *
adreno_create_vm(struct msm_gpu *gpu,
struct platform_device *pdev)
{
return adreno_iommu_create_vm(gpu, pdev, 0 );
}
struct drm_gpuvm *
adreno_iommu_create_vm(struct msm_gpu *gpu,
struct platform_device *pdev,
unsigned long quirks)
{
struct iommu_domain_geometry *geometry;
struct msm_mmu *mmu;
struct drm_gpuvm *vm;
u64 start, size;
mmu = msm_iommu_gpu_new(&pdev->dev, gpu, quirks);
if (!mmu)
return ERR_PTR(-ENODEV);
else if (IS_ERR_OR_NULL(mmu))
return ERR_CAST(mmu);
geometry = msm_iommu_get_geometry(mmu);
if (IS_ERR(geometry))
return ERR_CAST(geometry);
/*
* Use the aperture start or SZ_16M , whichever is greater . This will
* ensure that we align with the allocated pagetable range while still
* allowing room in the lower 32 bits for GMEM and whatnot
*/
start = max_t(u64, SZ_16M, geometry->aperture_start);
size = geometry->aperture_end - start + 1 ;
vm = msm_gem_vm_create(gpu->dev, mmu, "gpu" , start & GENMASK_ULL(48 , 0 ),
size, true );
if (IS_ERR(vm) && !IS_ERR(mmu))
mmu->funcs->destroy(mmu);
return vm;
}
u64 adreno_private_vm_size(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(&gpu->pdev->dev);
const struct io_pgtable_cfg *ttbr1_cfg;
if (address_space_size)
return address_space_size;
if (adreno_gpu->info->quirks & ADRENO_QUIRK_4GB_VA)
return SZ_4G;
if (!adreno_smmu || !adreno_smmu->get_ttbr1_cfg)
return SZ_4G;
ttbr1_cfg = adreno_smmu->get_ttbr1_cfg(adreno_smmu->cookie);
/*
* Userspace VM is actually using TTBR0 , but both are the same size ,
* with b48 ( sign bit ) selecting which TTBRn to use . So if IAS is
* 48 , the total ( kernel + user ) address space size is effectively
* 49 bits . But what userspace is control of is the lower 48 .
*/
return BIT(ttbr1_cfg->ias) - ADRENO_VM_START;
}
void adreno_check_and_reenable_stall(struct adreno_gpu *adreno_gpu)
{
struct msm_gpu *gpu = &adreno_gpu->base;
struct msm_drm_private *priv = gpu->dev->dev_private;
unsigned long flags;
/*
* Wait until the cooldown period has passed and we would actually
* collect a crashdump to re - enable stall - on - fault .
*/
spin_lock_irqsave(&priv->fault_stall_lock, flags);
if (!priv->stall_enabled &&
ktime_after(ktime_get(), priv->stall_reenable_time) &&
!READ_ONCE(gpu->crashstate)) {
struct msm_mmu *mmu = to_msm_vm(gpu->vm)->mmu;
priv->stall_enabled = true ;
mmu->funcs->set_stall(mmu, true );
}
spin_unlock_irqrestore(&priv->fault_stall_lock, flags);
}
#define ARM_SMMU_FSR_TF BIT(1 )
#define ARM_SMMU_FSR_PF BIT(3 )
#define ARM_SMMU_FSR_EF BIT(4 )
#define ARM_SMMU_FSR_SS BIT(30 )
int adreno_fault_handler(struct msm_gpu *gpu, unsigned long iova, int flags,
struct adreno_smmu_fault_info *info, const char *block,
u32 scratch[4 ])
{
struct msm_drm_private *priv = gpu->dev->dev_private;
struct msm_mmu *mmu = to_msm_vm(gpu->vm)->mmu;
const char *type = "UNKNOWN" ;
bool do_devcoredump = info && (info->fsr & ARM_SMMU_FSR_SS) &&
!READ_ONCE(gpu->crashstate);
unsigned long irq_flags;
/*
* In case there is a subsequent storm of pagefaults , disable
* stall - on - fault for at least half a second .
*/
spin_lock_irqsave(&priv->fault_stall_lock, irq_flags);
if (priv->stall_enabled) {
priv->stall_enabled = false ;
mmu->funcs->set_stall(mmu, false );
}
priv->stall_reenable_time = ktime_add_ms(ktime_get(), 500 );
spin_unlock_irqrestore(&priv->fault_stall_lock, irq_flags);
/*
* Print a default message if we couldn ' t get the data from the
* adreno - smmu - priv
*/
if (!info) {
pr_warn_ratelimited("*** gpu fault: iova=%.16lx flags=%d (%u,%u,%u,%u)\n" ,
iova, flags,
scratch[0 ], scratch[1 ], scratch[2 ], scratch[3 ]);
return 0 ;
}
if (info->fsr & ARM_SMMU_FSR_TF)
type = "TRANSLATION" ;
else if (info->fsr & ARM_SMMU_FSR_PF)
type = "PERMISSION" ;
else if (info->fsr & ARM_SMMU_FSR_EF)
type = "EXTERNAL" ;
pr_warn_ratelimited("*** gpu fault: ttbr0=%.16llx iova=%.16lx dir=%s type=%s source=%s (%u,%u,%u,%u)\n" ,
info->ttbr0, iova,
flags & IOMMU_FAULT_WRITE ? "WRITE" : "READ" ,
type, block,
scratch[0 ], scratch[1 ], scratch[2 ], scratch[3 ]);
if (do_devcoredump) {
struct msm_gpu_fault_info fault_info = {};
/* Turn off the hangcheck timer to keep it from bothering us */
timer_delete(&gpu->hangcheck_timer);
fault_info.ttbr0 = info->ttbr0;
fault_info.iova = iova;
fault_info.flags = flags;
fault_info.type = type;
fault_info.block = block;
msm_gpu_fault_crashstate_capture(gpu, &fault_info);
}
return 0 ;
}
static bool
adreno_smmu_has_prr(struct msm_gpu *gpu)
{
struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(&gpu->pdev->dev);
return adreno_smmu && adreno_smmu->set_prr_addr;
}
int adreno_get_param(struct msm_gpu *gpu, struct msm_context *ctx,
uint32_t param, uint64_t *value, uint32_t *len)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
struct drm_device *drm = gpu->dev;
/* Note ctx can be NULL when called from rd_open(): */
struct drm_gpuvm *vm = ctx ? msm_context_vm(drm, ctx) : NULL;
/* No pointer params yet */
if (*len != 0 )
return UERR(EINVAL, drm, "invalid len" );
switch (param) {
case MSM_PARAM_GPU_ID:
*value = adreno_gpu->info->revn;
return 0 ;
case MSM_PARAM_GMEM_SIZE:
*value = adreno_gpu->info->gmem;
return 0 ;
case MSM_PARAM_GMEM_BASE:
if (adreno_is_a650_family(adreno_gpu) ||
adreno_is_a740_family(adreno_gpu))
*value = 0 ;
else
*value = 0 x100000;
return 0 ;
case MSM_PARAM_CHIP_ID:
*value = adreno_gpu->chip_id;
if (!adreno_gpu->info->revn)
*value |= ((uint64_t) adreno_gpu->speedbin) << 32 ;
return 0 ;
case MSM_PARAM_MAX_FREQ:
*value = adreno_gpu->base.fast_rate;
return 0 ;
case MSM_PARAM_TIMESTAMP:
if (adreno_gpu->funcs->get_timestamp) {
int ret;
pm_runtime_get_sync(&gpu->pdev->dev);
ret = adreno_gpu->funcs->get_timestamp(gpu, value);
pm_runtime_put_autosuspend(&gpu->pdev->dev);
return ret;
}
return -EINVAL;
case MSM_PARAM_PRIORITIES:
*value = gpu->nr_rings * NR_SCHED_PRIORITIES;
return 0 ;
case MSM_PARAM_PP_PGTABLE:
*value = 0 ;
return 0 ;
case MSM_PARAM_FAULTS:
if (vm)
*value = gpu->global_faults + to_msm_vm(vm)->faults;
else
*value = gpu->global_faults;
return 0 ;
case MSM_PARAM_SUSPENDS:
*value = gpu->suspend_count;
return 0 ;
case MSM_PARAM_VA_START:
if (vm == gpu->vm)
return UERR(EINVAL, drm, "requires per-process pgtables" );
*value = vm->mm_start;
return 0 ;
case MSM_PARAM_VA_SIZE:
if (vm == gpu->vm)
return UERR(EINVAL, drm, "requires per-process pgtables" );
*value = vm->mm_range;
return 0 ;
case MSM_PARAM_HIGHEST_BANK_BIT:
*value = adreno_gpu->ubwc_config->highest_bank_bit;
return 0 ;
case MSM_PARAM_RAYTRACING:
*value = adreno_gpu->has_ray_tracing;
return 0 ;
case MSM_PARAM_UBWC_SWIZZLE:
*value = adreno_gpu->ubwc_config->ubwc_swizzle;
return 0 ;
case MSM_PARAM_MACROTILE_MODE:
*value = adreno_gpu->ubwc_config->macrotile_mode;
return 0 ;
case MSM_PARAM_UCHE_TRAP_BASE:
*value = adreno_gpu->uche_trap_base;
return 0 ;
case MSM_PARAM_HAS_PRR:
*value = adreno_smmu_has_prr(gpu);
return 0 ;
default :
return UERR(EINVAL, drm, "%s: invalid param: %u" , gpu->name, param);
}
}
int adreno_set_param(struct msm_gpu *gpu, struct msm_context *ctx,
uint32_t param, uint64_t value, uint32_t len)
{
struct drm_device *drm = gpu->dev;
switch (param) {
case MSM_PARAM_COMM:
case MSM_PARAM_CMDLINE:
/* kstrdup_quotable_cmdline() limits to PAGE_SIZE, so
* that should be a reasonable upper bound
*/
if (len > PAGE_SIZE)
return UERR(EINVAL, drm, "invalid len" );
break ;
default :
if (len != 0 )
return UERR(EINVAL, drm, "invalid len" );
}
switch (param) {
case MSM_PARAM_COMM:
case MSM_PARAM_CMDLINE: {
char *str, **paramp;
str = memdup_user_nul(u64_to_user_ptr(value), len);
if (IS_ERR(str))
return PTR_ERR(str);
mutex_lock(&gpu->lock);
if (param == MSM_PARAM_COMM) {
paramp = &ctx->comm;
} else {
paramp = &ctx->cmdline;
}
kfree(*paramp);
*paramp = str;
mutex_unlock(&gpu->lock);
return 0 ;
}
case MSM_PARAM_SYSPROF:
if (!capable(CAP_SYS_ADMIN))
return UERR(EPERM, drm, "invalid permissions" );
return msm_context_set_sysprof(ctx, gpu, value);
case MSM_PARAM_EN_VM_BIND:
/* We can only support VM_BIND with per-process pgtables: */
if (ctx->vm == gpu->vm)
return UERR(EINVAL, drm, "requires per-process pgtables" );
/*
* We can only swtich to VM_BIND mode if the VM has not yet
* been created :
*/
if (ctx->vm)
return UERR(EBUSY, drm, "VM already created" );
ctx->userspace_managed_vm = value;
return 0 ;
default :
return UERR(EINVAL, drm, "%s: invalid param: %u" , gpu->name, param);
}
}
const struct firmware *
adreno_request_fw(struct adreno_gpu *adreno_gpu, const char *fwname)
{
struct drm_device *drm = adreno_gpu->base.dev;
const struct firmware *fw = NULL;
char *newname;
int ret;
newname = kasprintf(GFP_KERNEL, "qcom/%s" , fwname);
if (!newname)
return ERR_PTR(-ENOMEM);
/*
* Try first to load from qcom / $ fwfile using a direct load ( to avoid
* a potential timeout waiting for usermode helper )
*/
if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
(adreno_gpu->fwloc == FW_LOCATION_NEW)) {
ret = request_firmware_direct(&fw, newname, drm->dev);
if (!ret) {
DRM_DEV_INFO(drm->dev, "loaded %s from new location\n" ,
newname);
adreno_gpu->fwloc = FW_LOCATION_NEW;
goto out;
} else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n" ,
newname, ret);
fw = ERR_PTR(ret);
goto out;
}
}
/*
* Then try the legacy location without qcom / prefix
*/
if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
(adreno_gpu->fwloc == FW_LOCATION_LEGACY)) {
ret = request_firmware_direct(&fw, fwname, drm->dev);
if (!ret) {
DRM_DEV_INFO(drm->dev, "loaded %s from legacy location\n" ,
fwname);
adreno_gpu->fwloc = FW_LOCATION_LEGACY;
goto out;
} else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n" ,
fwname, ret);
fw = ERR_PTR(ret);
goto out;
}
}
/*
* Finally fall back to request_firmware ( ) for cases where the
* usermode helper is needed ( I think mainly android )
*/
if ((adreno_gpu->fwloc == FW_LOCATION_UNKNOWN) ||
(adreno_gpu->fwloc == FW_LOCATION_HELPER)) {
ret = request_firmware(&fw, newname, drm->dev);
if (!ret) {
DRM_DEV_INFO(drm->dev, "loaded %s with helper\n" ,
newname);
adreno_gpu->fwloc = FW_LOCATION_HELPER;
goto out;
} else if (adreno_gpu->fwloc != FW_LOCATION_UNKNOWN) {
DRM_DEV_ERROR(drm->dev, "failed to load %s: %d\n" ,
newname, ret);
fw = ERR_PTR(ret);
goto out;
}
}
DRM_DEV_ERROR(drm->dev, "failed to load %s\n" , fwname);
fw = ERR_PTR(-ENOENT);
out:
kfree(newname);
return fw;
}
int adreno_load_fw(struct adreno_gpu *adreno_gpu)
{
int i;
for (i = 0 ; i < ARRAY_SIZE(adreno_gpu->info->fw); i++) {
const struct firmware *fw;
if (!adreno_gpu->info->fw[i])
continue ;
/* Skip loading GMU firmware with GMU Wrapper */
if (adreno_has_gmu_wrapper(adreno_gpu) && i == ADRENO_FW_GMU)
continue ;
/* Skip if the firmware has already been loaded */
if (adreno_gpu->fw[i])
continue ;
fw = adreno_request_fw(adreno_gpu, adreno_gpu->info->fw[i]);
if (IS_ERR(fw))
return PTR_ERR(fw);
adreno_gpu->fw[i] = fw;
}
return 0 ;
}
struct drm_gem_object *adreno_fw_create_bo(struct msm_gpu *gpu,
const struct firmware *fw, u64 *iova)
{
struct drm_gem_object *bo;
void *ptr;
ptr = msm_gem_kernel_new(gpu->dev, fw->size - 4 ,
MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->vm, &bo, iova);
if (IS_ERR(ptr))
return ERR_CAST(ptr);
memcpy(ptr, &fw->data[4 ], fw->size - 4 );
msm_gem_put_vaddr(bo);
return bo;
}
int adreno_hw_init(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
int ret;
VERB("%s" , gpu->name);
if (adreno_gpu->info->family >= ADRENO_6XX_GEN1 &&
qcom_scm_set_gpu_smmu_aperture_is_available()) {
/* We currently always use context bank 0, so hard code this */
ret = qcom_scm_set_gpu_smmu_aperture(0 );
if (ret)
DRM_DEV_ERROR(gpu->dev->dev, "unable to set SMMU aperture: %d\n" , ret);
}
for (int i = 0 ; i < gpu->nr_rings; i++) {
struct msm_ringbuffer *ring = gpu->rb[i];
if (!ring)
continue ;
ring->cur = ring->start;
ring->next = ring->start;
ring->memptrs->rptr = 0 ;
ring->memptrs->bv_fence = ring->fctx->completed_fence;
/* Detect and clean up an impossible fence, ie. if GPU managed
* to scribble something invalid , we don ' t want that to confuse
* us into mistakingly believing that submits have completed .
*/
if (fence_before(ring->fctx->last_fence, ring->memptrs->fence)) {
ring->memptrs->fence = ring->fctx->last_fence;
}
}
return 0 ;
}
/* Use this helper to read rptr, since a430 doesn't update rptr in memory */
static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
struct msm_ringbuffer *ring)
{
struct msm_gpu *gpu = &adreno_gpu->base;
return gpu->funcs->get_rptr(gpu, ring);
}
struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)
{
return gpu->rb[0 ];
}
void adreno_recover(struct msm_gpu *gpu)
{
struct drm_device *dev = gpu->dev;
int ret;
// XXX pm-runtime?? we *need* the device to be off after this
// so maybe continuing to call ->pm_suspend/resume() is better?
gpu->funcs->pm_suspend(gpu);
gpu->funcs->pm_resume(gpu);
ret = msm_gpu_hw_init(gpu);
if (ret) {
DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n" , ret);
/* hmm, oh well? */
}
}
void adreno_flush(struct msm_gpu *gpu, struct msm_ringbuffer *ring, u32 reg)
{
uint32_t wptr;
/* Copy the shadow to the actual register */
ring->cur = ring->next;
/*
* Mask wptr value that we calculate to fit in the HW range . This is
* to account for the possibility that the last command fit exactly into
* the ringbuffer and rb - > next hasn ' t wrapped to zero yet
*/
wptr = get_wptr(ring);
/* ensure writes to ringbuffer have hit system memory: */
mb();
gpu_write(gpu, reg, wptr);
}
bool adreno_idle(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
uint32_t wptr = get_wptr(ring);
/* wait for CP to drain ringbuffer: */
if (!spin_until(get_rptr(adreno_gpu, ring) == wptr))
return true ;
/* TODO maybe we need to reset GPU here to recover from hang? */
DRM_ERROR("%s: timeout waiting to drain ringbuffer %d rptr/wptr = %X/%X\n" ,
gpu->name, ring->id, get_rptr(adreno_gpu, ring), wptr);
return false ;
}
int adreno_gpu_state_get(struct msm_gpu *gpu, struct msm_gpu_state *state)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
int i, count = 0 ;
WARN_ON(!mutex_is_locked(&gpu->lock));
kref_init(&state->ref);
ktime_get_real_ts64(&state->time);
for (i = 0 ; i < gpu->nr_rings; i++) {
int size = 0 , j;
state->ring[i].fence = gpu->rb[i]->memptrs->fence;
state->ring[i].iova = gpu->rb[i]->iova;
state->ring[i].seqno = gpu->rb[i]->fctx->last_fence;
state->ring[i].rptr = get_rptr(adreno_gpu, gpu->rb[i]);
state->ring[i].wptr = get_wptr(gpu->rb[i]);
/* Copy at least 'wptr' dwords of the data */
size = state->ring[i].wptr;
/* After wptr find the last non zero dword to save space */
for (j = state->ring[i].wptr; j < MSM_GPU_RINGBUFFER_SZ >> 2 ; j++)
if (gpu->rb[i]->start[j])
size = j + 1 ;
if (size) {
state->ring[i].data = kvmemdup(gpu->rb[i]->start, size << 2 , GFP_KERNEL);
if (state->ring[i].data)
state->ring[i].data_size = size << 2 ;
}
}
/* Some targets prefer to collect their own registers */
if (!adreno_gpu->registers)
return 0 ;
/* Count the number of registers */
for (i = 0 ; adreno_gpu->registers[i] != ~0 ; i += 2 )
count += adreno_gpu->registers[i + 1 ] -
adreno_gpu->registers[i] + 1 ;
state->registers = kcalloc(count * 2 , sizeof (u32), GFP_KERNEL);
if (state->registers) {
int pos = 0 ;
for (i = 0 ; adreno_gpu->registers[i] != ~0 ; i += 2 ) {
u32 start = adreno_gpu->registers[i];
u32 end = adreno_gpu->registers[i + 1 ];
u32 addr;
for (addr = start; addr <= end; addr++) {
state->registers[pos++] = addr;
state->registers[pos++] = gpu_read(gpu, addr);
}
}
state->nr_registers = count;
}
return 0 ;
}
void adreno_gpu_state_destroy(struct msm_gpu_state *state)
{
int i;
for (i = 0 ; i < ARRAY_SIZE(state->ring); i++)
kvfree(state->ring[i].data);
for (i = 0 ; state->bos && i < state->nr_bos; i++)
kvfree(state->bos[i].data);
kfree(state->vm_logs);
kfree(state->bos);
kfree(state->comm);
kfree(state->cmd);
kfree(state->registers);
}
static void adreno_gpu_state_kref_destroy(struct kref *kref)
{
struct msm_gpu_state *state = container_of(kref,
struct msm_gpu_state, ref);
adreno_gpu_state_destroy(state);
kfree(state);
}
int adreno_gpu_state_put(struct msm_gpu_state *state)
{
if (IS_ERR_OR_NULL(state))
return 1 ;
return kref_put(&state->ref, adreno_gpu_state_kref_destroy);
}
#if defined (CONFIG_DEBUG_FS) || defined (CONFIG_DEV_COREDUMP)
static char *adreno_gpu_ascii85_encode(u32 *src, size_t len)
{
void *buf;
size_t buf_itr = 0 , buffer_size;
char out[ASCII85_BUFSZ];
long l;
int i;
if (!src || !len)
return NULL;
l = ascii85_encode_len(len);
/*
* Ascii85 outputs either a 5 byte string or a 1 byte string . So we
* account for the worst case of 5 bytes per dword plus the 1 for ' \ 0 '
*/
buffer_size = (l * 5 ) + 1 ;
buf = kvmalloc(buffer_size, GFP_KERNEL);
if (!buf)
return NULL;
for (i = 0 ; i < l; i++)
buf_itr += scnprintf(buf + buf_itr, buffer_size - buf_itr, "%s" ,
ascii85_encode(src[i], out));
return buf;
}
/* len is expected to be in bytes
*
* WARNING : * ptr should be allocated with kvmalloc or friends . It can be free ' d
* with kvfree ( ) and replaced with a newly kvmalloc ' d buffer on the first call
* when the unencoded raw data is encoded
*/
void adreno_show_object(struct drm_printer *p, void **ptr, int len,
bool *encoded)
{
if (!*ptr || !len)
return ;
if (!*encoded) {
long datalen, i;
u32 *buf = *ptr;
/*
* Only dump the non - zero part of the buffer - rarely will
* any data completely fill the entire allocated size of
* the buffer .
*/
for (datalen = 0 , i = 0 ; i < len >> 2 ; i++)
if (buf[i])
datalen = ((i + 1 ) << 2 );
/*
* If we reach here , then the originally captured binary buffer
* will be replaced with the ascii85 encoded string
*/
*ptr = adreno_gpu_ascii85_encode(buf, datalen);
kvfree(buf);
*encoded = true ;
}
if (!*ptr)
return ;
drm_puts(p, " data: !!ascii85 |\n" );
drm_puts(p, " " );
drm_puts(p, *ptr);
drm_puts(p, "\n" );
}
void adreno_show(struct msm_gpu *gpu, struct msm_gpu_state *state,
struct drm_printer *p)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
int i;
if (IS_ERR_OR_NULL(state))
return ;
drm_printf(p, "revision: %u (%" ADRENO_CHIPID_FMT")\n" ,
adreno_gpu->info->revn,
ADRENO_CHIPID_ARGS(adreno_gpu->chip_id));
/*
* If this is state collected due to iova fault , so fault related info
*
* TTBR0 would not be zero , so this is a good way to distinguish
*/
if (state->fault_info.ttbr0) {
const struct msm_gpu_fault_info *info = &state->fault_info;
drm_puts(p, "fault-info:\n" );
drm_printf(p, " - ttbr0=%.16llx\n" , info->ttbr0);
drm_printf(p, " - iova=%.16lx\n" , info->iova);
drm_printf(p, " - dir=%s\n" , info->flags & IOMMU_FAULT_WRITE ? "WRITE" : "READ" );
drm_printf(p, " - type=%s\n" , info->type);
drm_printf(p, " - source=%s\n" , info->block);
/* Information extracted from what we think are the current
* pgtables . Hopefully the TTBR0 matches what we ' ve extracted
* from the SMMU registers in smmu_info !
*/
drm_puts(p, "pgtable-fault-info:\n" );
drm_printf(p, " - ttbr0: %.16llx\n" , (u64)info->pgtbl_ttbr0);
drm_printf(p, " - asid: %d\n" , info->asid);
drm_printf(p, " - ptes: %.16llx %.16llx %.16llx %.16llx\n" ,
info->ptes[0 ], info->ptes[1 ], info->ptes[2 ], info->ptes[3 ]);
}
if (state->vm_logs) {
drm_puts(p, "vm-log:\n" );
for (i = 0 ; i < state->nr_vm_logs; i++) {
struct msm_gem_vm_log_entry *e = &state->vm_logs[i];
drm_printf(p, " - %s:%d: 0x%016llx-0x%016llx\n" ,
e->op, e->queue_id, e->iova,
e->iova + e->range);
}
}
drm_printf(p, "rbbm-status: 0x%08x\n" , state->rbbm_status);
drm_puts(p, "ringbuffer:\n" );
for (i = 0 ; i < gpu->nr_rings; i++) {
drm_printf(p, " - id: %d\n" , i);
drm_printf(p, " iova: 0x%016llx\n" , state->ring[i].iova);
drm_printf(p, " last-fence: %u\n" , state->ring[i].seqno);
drm_printf(p, " retired-fence: %u\n" , state->ring[i].fence);
drm_printf(p, " rptr: %u\n" , state->ring[i].rptr);
drm_printf(p, " wptr: %u\n" , state->ring[i].wptr);
drm_printf(p, " size: %u\n" , MSM_GPU_RINGBUFFER_SZ);
adreno_show_object(p, &state->ring[i].data,
state->ring[i].data_size, &state->ring[i].encoded);
}
if (state->bos) {
drm_puts(p, "bos:\n" );
for (i = 0 ; i < state->nr_bos; i++) {
drm_printf(p, " - iova: 0x%016llx\n" ,
state->bos[i].iova);
drm_printf(p, " size: %zd\n" , state->bos[i].size);
drm_printf(p, " flags: 0x%x\n" , state->bos[i].flags);
drm_printf(p, " name: %-32s\n" , state->bos[i].name);
adreno_show_object(p, &state->bos[i].data,
state->bos[i].size, &state->bos[i].encoded);
}
}
if (state->nr_registers) {
drm_puts(p, "registers:\n" );
for (i = 0 ; i < state->nr_registers; i++) {
drm_printf(p, " - { offset: 0x%04x, value: 0x%08x }\n" ,
state->registers[i * 2 ] << 2 ,
state->registers[(i * 2 ) + 1 ]);
}
}
}
#endif
/* Dump common gpu status and scratch registers on any hang, to make
* the hangcheck logs more useful . The scratch registers seem always
* safe to read when GPU has hung ( unlike some other regs , depending
* on how the GPU hung ) , and they are useful to match up to cmdstream
* dumps when debugging hangs :
*/
void adreno_dump_info(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
int i;
printk("revision: %u (%" ADRENO_CHIPID_FMT")\n" ,
adreno_gpu->info->revn,
ADRENO_CHIPID_ARGS(adreno_gpu->chip_id));
for (i = 0 ; i < gpu->nr_rings; i++) {
struct msm_ringbuffer *ring = gpu->rb[i];
printk("rb %d: fence: %d/%d\n" , i,
ring->memptrs->fence,
ring->fctx->last_fence);
printk("rptr: %d\n" , get_rptr(adreno_gpu, ring));
printk("rb wptr: %d\n" , get_wptr(ring));
}
}
/* would be nice to not have to duplicate the _show() stuff with printk(): */
void adreno_dump(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
int i;
if (!adreno_gpu->registers)
return ;
/* dump these out in a form that can be parsed by demsm: */
printk("IO:region %s 00000000 00020000\n" , gpu->name);
for (i = 0 ; adreno_gpu->registers[i] != ~0 ; i += 2 ) {
uint32_t start = adreno_gpu->registers[i];
uint32_t end = adreno_gpu->registers[i+1 ];
uint32_t addr;
for (addr = start; addr <= end; addr++) {
uint32_t val = gpu_read(gpu, addr);
printk("IO:R %08x %08x\n" , addr<<2 , val);
}
}
}
static uint32_t ring_freewords(struct msm_ringbuffer *ring)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(ring->gpu);
uint32_t size = MSM_GPU_RINGBUFFER_SZ >> 2 ;
/* Use ring->next to calculate free size */
uint32_t wptr = ring->next - ring->start;
uint32_t rptr = get_rptr(adreno_gpu, ring);
return (rptr + (size - 1 ) - wptr) % size;
}
void adreno_wait_ring(struct msm_ringbuffer *ring, uint32_t ndwords)
{
if (spin_until(ring_freewords(ring) >= ndwords))
DRM_DEV_ERROR(ring->gpu->dev->dev,
"timeout waiting for space in ringbuffer %d\n" ,
ring->id);
}
static int adreno_get_pwrlevels(struct device *dev,
struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
unsigned long freq = ULONG_MAX;
struct dev_pm_opp *opp;
int ret;
gpu->fast_rate = 0 ;
/* devm_pm_opp_of_add_table may error out but will still create an OPP table */
ret = devm_pm_opp_of_add_table(dev);
if (ret == -ENODEV) {
/* Special cases for ancient hw with ancient DT bindings */
if (adreno_is_a2xx(adreno_gpu)) {
dev_warn(dev, "Unable to find the OPP table. Falling back to 200 MHz.\n" );
dev_pm_opp_add(dev, 200000000 , 0 );
} else if (adreno_is_a320(adreno_gpu)) {
dev_warn(dev, "Unable to find the OPP table. Falling back to 450 MHz.\n" );
dev_pm_opp_add(dev, 450000000 , 0 );
} else {
DRM_DEV_ERROR(dev, "Unable to find the OPP table\n" );
return -ENODEV;
}
} else if (ret) {
DRM_DEV_ERROR(dev, "Unable to set the OPP table\n" );
return ret;
}
/* Find the fastest defined rate */
opp = dev_pm_opp_find_freq_floor(dev, &freq);
if (IS_ERR(opp))
return PTR_ERR(opp);
gpu->fast_rate = freq;
dev_pm_opp_put(opp);
DBG("fast_rate=%u, slow_rate=27000000" , gpu->fast_rate);
return 0 ;
}
int adreno_gpu_ocmem_init(struct device *dev, struct adreno_gpu *adreno_gpu,
struct adreno_ocmem *adreno_ocmem)
{
struct ocmem_buf *ocmem_hdl;
struct ocmem *ocmem;
ocmem = of_get_ocmem(dev);
if (IS_ERR(ocmem)) {
if (PTR_ERR(ocmem) == -ENODEV) {
/*
* Return success since either the ocmem property was
* not specified in device tree , or ocmem support is
* not compiled into the kernel .
*/
return 0 ;
}
return PTR_ERR(ocmem);
}
ocmem_hdl = ocmem_allocate(ocmem, OCMEM_GRAPHICS, adreno_gpu->info->gmem);
if (IS_ERR(ocmem_hdl))
return PTR_ERR(ocmem_hdl);
adreno_ocmem->ocmem = ocmem;
adreno_ocmem->base = ocmem_hdl->addr;
adreno_ocmem->hdl = ocmem_hdl;
if (WARN_ON(ocmem_hdl->len != adreno_gpu->info->gmem))
return -ENOMEM;
return 0 ;
}
void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *adreno_ocmem)
{
if (adreno_ocmem && adreno_ocmem->base)
ocmem_free(adreno_ocmem->ocmem, OCMEM_GRAPHICS,
adreno_ocmem->hdl);
}
int adreno_read_speedbin(struct device *dev, u32 *speedbin)
{
return nvmem_cell_read_variable_le_u32(dev, "speed_bin" , speedbin);
}
int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
struct adreno_gpu *adreno_gpu,
const struct adreno_gpu_funcs *funcs, int nr_rings)
{
struct device *dev = &pdev->dev;
struct adreno_platform_config *config = dev->platform_data;
struct msm_gpu_config adreno_gpu_config = { 0 };
struct msm_gpu *gpu = &adreno_gpu->base;
const char *gpu_name;
u32 speedbin;
int ret;
adreno_gpu->funcs = funcs;
adreno_gpu->info = config->info;
adreno_gpu->chip_id = config->chip_id;
gpu->allow_relocs = config->info->family < ADRENO_6XX_GEN1;
gpu->pdev = pdev;
/* Only handle the core clock when GMU is not in use (or is absent). */
if (adreno_has_gmu_wrapper(adreno_gpu) ||
adreno_gpu->info->family < ADRENO_6XX_GEN1) {
/*
* This can only be done before devm_pm_opp_of_add_table ( ) , or
* dev_pm_opp_set_config ( ) will WARN_ON ( )
*/
if (IS_ERR(devm_clk_get(dev, "core" ))) {
/*
* If " core " is absent , go for the legacy clock name .
* If we got this far in probing , it ' s a given one of
* them exists .
*/
devm_pm_opp_set_clkname(dev, "core_clk" );
} else
devm_pm_opp_set_clkname(dev, "core" );
}
if (adreno_read_speedbin(dev, &speedbin) || !speedbin)
speedbin = 0 xffff;
adreno_gpu->speedbin = (uint16_t) (0 xffff & speedbin);
gpu_name = devm_kasprintf(dev, GFP_KERNEL, "%" ADRENO_CHIPID_FMT,
ADRENO_CHIPID_ARGS(config->chip_id));
if (!gpu_name)
return -ENOMEM;
adreno_gpu_config.ioname = "kgsl_3d0_reg_memory" ;
adreno_gpu_config.nr_rings = nr_rings;
ret = adreno_get_pwrlevels(dev, gpu);
if (ret)
return ret;
pm_runtime_set_autosuspend_delay(dev,
adreno_gpu->info->inactive_period);
pm_runtime_use_autosuspend(dev);
return msm_gpu_init(drm, pdev, &adreno_gpu->base, &funcs->base,
gpu_name, &adreno_gpu_config);
}
void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
{
struct msm_gpu *gpu = &adreno_gpu->base;
struct msm_drm_private *priv = gpu->dev ? gpu->dev->dev_private : NULL;
unsigned int i;
for (i = 0 ; i < ARRAY_SIZE(adreno_gpu->info->fw); i++)
release_firmware(adreno_gpu->fw[i]);
if (priv && pm_runtime_enabled(&priv->gpu_pdev->dev))
pm_runtime_disable(&priv->gpu_pdev->dev);
msm_gpu_cleanup(&adreno_gpu->base);
}
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