drivers/gpu/msm/adreno_dispatch.c (1,448 lines of code) (raw):
/* Copyright (c) 2013-2016,2020, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/jiffies.h>
#include <linux/err.h>
#include "kgsl.h"
#include "kgsl_cffdump.h"
#include "kgsl_device.h"
#include "kgsl_sharedmem.h"
#include "adreno.h"
#include "adreno_ringbuffer.h"
#include "adreno_trace.h"
#include "kgsl_sharedmem.h"
#define CMDQUEUE_NEXT(_i, _s) (((_i) + 1) % (_s))
/* Time in ms after which the dispatcher tries to schedule an unscheduled RB */
unsigned int adreno_dispatch_starvation_time = 2000;
/* Amount of time in ms that a starved RB is permitted to execute for */
unsigned int adreno_dispatch_time_slice = 25;
/*
* If set then dispatcher tries to schedule lower priority RB's after if they
* have commands in their pipe and have been inactive for
* _dispatch_starvation_time. Also, once an RB is schduled it will be allowed
* to run for _dispatch_time_slice unless it's commands complete before
* _dispatch_time_slice
*/
unsigned int adreno_disp_preempt_fair_sched;
/* Number of commands that can be queued in a context before it sleeps */
static unsigned int _context_cmdqueue_size = 50;
/* Number of milliseconds to wait for the context queue to clear */
static unsigned int _context_queue_wait = 10000;
/* Number of command batches sent at a time from a single context */
static unsigned int _context_cmdbatch_burst = 5;
/*
* GFT throttle parameters. If GFT recovered more than
* X times in Y ms invalidate the context and do not attempt recovery.
* X -> _fault_throttle_burst
* Y -> _fault_throttle_time
*/
static unsigned int _fault_throttle_time = 3000;
static unsigned int _fault_throttle_burst = 3;
/*
* Maximum ringbuffer inflight for the single submitting context case - this
* should be sufficiently high to keep the GPU loaded
*/
static unsigned int _dispatcher_q_inflight_hi = 15;
/*
* Minimum inflight for the multiple context case - this should sufficiently low
* to allow for lower latency context switching
*/
static unsigned int _dispatcher_q_inflight_lo = 4;
/* Command batch timeout (in milliseconds) */
unsigned int adreno_cmdbatch_timeout = 2000;
/* Interval for reading and comparing fault detection registers */
static unsigned int _fault_timer_interval = 200;
#define CMDQUEUE_RB(_cmdqueue) \
((struct adreno_ringbuffer *) \
container_of((_cmdqueue), struct adreno_ringbuffer, dispatch_q))
#define CMDQUEUE(_ringbuffer) (&(_ringbuffer)->dispatch_q)
static int adreno_dispatch_retire_cmdqueue(struct adreno_device *adreno_dev,
struct adreno_dispatcher_cmdqueue *cmdqueue);
static inline bool cmdqueue_is_current(
struct adreno_dispatcher_cmdqueue *cmdqueue)
{
struct adreno_ringbuffer *rb = CMDQUEUE_RB(cmdqueue);
struct adreno_device *adreno_dev = ADRENO_RB_DEVICE(rb);
return (adreno_dev->cur_rb == rb);
}
static void _add_context(struct adreno_device *adreno_dev,
struct adreno_context *drawctxt)
{
/* Remove it from the list */
list_del_init(&drawctxt->active_node);
/* And push it to the front */
drawctxt->active_time = jiffies;
list_add(&drawctxt->active_node, &adreno_dev->active_list);
}
static int __count_context(struct adreno_context *drawctxt, void *data)
{
unsigned long expires = drawctxt->active_time + msecs_to_jiffies(100);
return time_after(jiffies, expires) ? 0 : 1;
}
static int __count_cmdqueue_context(struct adreno_context *drawctxt, void *data)
{
unsigned long expires = drawctxt->active_time + msecs_to_jiffies(100);
if (time_after(jiffies, expires))
return 0;
return (&drawctxt->rb->dispatch_q ==
(struct adreno_dispatcher_cmdqueue *) data) ? 1 : 0;
}
static int _adreno_count_active_contexts(struct adreno_device *adreno_dev,
int (*func)(struct adreno_context *, void *), void *data)
{
struct adreno_context *ctxt;
int count = 0;
list_for_each_entry(ctxt, &adreno_dev->active_list, active_node) {
if (func(ctxt, data) == 0)
return count;
count++;
}
return count;
}
static void _track_context(struct adreno_device *adreno_dev,
struct adreno_dispatcher_cmdqueue *cmdqueue,
struct adreno_context *drawctxt)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
spin_lock(&adreno_dev->active_list_lock);
_add_context(adreno_dev, drawctxt);
device->active_context_count =
_adreno_count_active_contexts(adreno_dev,
__count_context, NULL);
cmdqueue->active_context_count =
_adreno_count_active_contexts(adreno_dev,
__count_cmdqueue_context, cmdqueue);
spin_unlock(&adreno_dev->active_list_lock);
}
/*
* If only one context has queued in the last 100 milliseconds increase
* inflight to a high number to load up the GPU. If multiple contexts
* have queued drop the inflight for better context switch latency.
* If no contexts have queued what are you even doing here?
*/
static inline int
_cmdqueue_inflight(struct adreno_dispatcher_cmdqueue *cmdqueue)
{
return (cmdqueue->active_context_count > 1)
? _dispatcher_q_inflight_lo : _dispatcher_q_inflight_hi;
}
static void fault_detect_read(struct adreno_device *adreno_dev)
{
int i;
if (!test_bit(ADRENO_DEVICE_SOFT_FAULT_DETECT, &adreno_dev->priv))
return;
for (i = 0; i < adreno_dev->num_ringbuffers; i++) {
struct adreno_ringbuffer *rb = &(adreno_dev->ringbuffers[i]);
adreno_rb_readtimestamp(adreno_dev, rb,
KGSL_TIMESTAMP_RETIRED, &(rb->fault_detect_ts));
}
for (i = 0; i < adreno_ft_regs_num; i++) {
if (adreno_ft_regs[i] != 0)
kgsl_regread(KGSL_DEVICE(adreno_dev), adreno_ft_regs[i],
&adreno_ft_regs_val[i]);
}
}
/*
* Check to see if the device is idle
*/
static inline bool _isidle(struct adreno_device *adreno_dev)
{
const struct adreno_gpu_core *gpucore = adreno_dev->gpucore;
unsigned int reg_rbbm_status;
if (!kgsl_state_is_awake(KGSL_DEVICE(adreno_dev)))
goto ret;
/* only check rbbm status to determine if GPU is idle */
adreno_readreg(adreno_dev, ADRENO_REG_RBBM_STATUS, ®_rbbm_status);
if (reg_rbbm_status & gpucore->busy_mask)
return false;
ret:
/* Clear the existing register values */
memset(adreno_ft_regs_val, 0,
adreno_ft_regs_num * sizeof(unsigned int));
return true;
}
/**
* fault_detect_read_compare() - Read the fault detect registers and compare
* them to the current value
* @device: Pointer to the KGSL device struct
*
* Read the set of fault detect registers and compare them to the current set
* of registers. Return 1 if any of the register values changed. Also, compare
* if the current RB's timstamp has changed or not.
*/
static int fault_detect_read_compare(struct adreno_device *adreno_dev)
{
struct adreno_ringbuffer *rb = ADRENO_CURRENT_RINGBUFFER(adreno_dev);
int i, ret = 0;
unsigned int ts;
/* Check to see if the device is idle - if so report no hang */
if (_isidle(adreno_dev) == true)
ret = 1;
for (i = 0; i < adreno_ft_regs_num; i++) {
unsigned int val;
if (adreno_ft_regs[i] == 0)
continue;
kgsl_regread(KGSL_DEVICE(adreno_dev), adreno_ft_regs[i], &val);
if (val != adreno_ft_regs_val[i])
ret = 1;
adreno_ft_regs_val[i] = val;
}
if (!adreno_rb_readtimestamp(adreno_dev, adreno_dev->cur_rb,
KGSL_TIMESTAMP_RETIRED, &ts)) {
if (ts != rb->fault_detect_ts)
ret = 1;
rb->fault_detect_ts = ts;
}
return ret;
}
static void start_fault_timer(struct adreno_device *adreno_dev)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
if (adreno_soft_fault_detect(adreno_dev))
mod_timer(&dispatcher->fault_timer,
jiffies + msecs_to_jiffies(_fault_timer_interval));
}
/**
* _retire_marker() - Retire a marker command batch without sending it to the
* hardware
* @cmdbatch: Pointer to the cmdbatch to retire
*
* In some cases marker commands can be retired by the software without going to
* the GPU. In those cases, update the memstore from the CPU, kick off the
* event engine to handle expired events and destroy the command batch.
*/
static void _retire_marker(struct kgsl_cmdbatch *cmdbatch)
{
struct kgsl_context *context = cmdbatch->context;
struct adreno_context *drawctxt = ADRENO_CONTEXT(cmdbatch->context);
struct kgsl_device *device = context->device;
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
/*
* Write the start and end timestamp to the memstore to keep the
* accounting sane
*/
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, soptimestamp),
cmdbatch->timestamp);
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, eoptimestamp),
cmdbatch->timestamp);
/* Retire pending GPU events for the object */
kgsl_process_event_group(device, &context->events);
/*
* For A3xx we still get the rptr from the CP_RB_RPTR instead of
* rptr scratch out address. At this point GPU clocks turned off.
* So avoid reading GPU register directly for A3xx.
*/
if (adreno_is_a3xx(adreno_dev))
trace_adreno_cmdbatch_retired(cmdbatch, -1, 0, 0, drawctxt->rb,
0);
else
trace_adreno_cmdbatch_retired(cmdbatch, -1, 0, 0, drawctxt->rb,
adreno_get_rptr(drawctxt->rb));
kgsl_cmdbatch_destroy(cmdbatch);
}
static int _check_context_queue(struct adreno_context *drawctxt)
{
int ret;
spin_lock(&drawctxt->lock);
/*
* Wake up if there is room in the context or if the whole thing got
* invalidated while we were asleep
*/
if (kgsl_context_invalid(&drawctxt->base))
ret = 1;
else
ret = drawctxt->queued < _context_cmdqueue_size ? 1 : 0;
spin_unlock(&drawctxt->lock);
return ret;
}
/*
* return true if this is a marker command and the dependent timestamp has
* retired
*/
static bool _marker_expired(struct kgsl_cmdbatch *cmdbatch)
{
return (cmdbatch->flags & KGSL_CMDBATCH_MARKER) &&
kgsl_check_timestamp(cmdbatch->device, cmdbatch->context,
cmdbatch->marker_timestamp);
}
static inline void _pop_cmdbatch(struct adreno_context *drawctxt)
{
drawctxt->cmdqueue_head = CMDQUEUE_NEXT(drawctxt->cmdqueue_head,
ADRENO_CONTEXT_CMDQUEUE_SIZE);
drawctxt->queued--;
}
/**
* Removes all expired marker and sync cmdbatches from
* the context queue when marker command and dependent
* timestamp are retired. This function is recursive.
* returns cmdbatch if context has command, NULL otherwise.
*/
static struct kgsl_cmdbatch *_expire_markers(struct adreno_context *drawctxt)
{
struct kgsl_cmdbatch *cmdbatch;
if (drawctxt->cmdqueue_head == drawctxt->cmdqueue_tail)
return NULL;
cmdbatch = drawctxt->cmdqueue[drawctxt->cmdqueue_head];
if (cmdbatch == NULL)
return NULL;
/* Check to see if this is a marker we can skip over */
if ((cmdbatch->flags & KGSL_CMDBATCH_MARKER) &&
_marker_expired(cmdbatch)) {
_pop_cmdbatch(drawctxt);
_retire_marker(cmdbatch);
return _expire_markers(drawctxt);
}
if (cmdbatch->flags & KGSL_CMDBATCH_SYNC) {
if (!kgsl_cmdbatch_events_pending(cmdbatch)) {
_pop_cmdbatch(drawctxt);
kgsl_cmdbatch_destroy(cmdbatch);
return _expire_markers(drawctxt);
}
}
return cmdbatch;
}
static void expire_markers(struct adreno_context *drawctxt)
{
spin_lock(&drawctxt->lock);
_expire_markers(drawctxt);
spin_unlock(&drawctxt->lock);
}
static struct kgsl_cmdbatch *_get_cmdbatch(struct adreno_context *drawctxt)
{
struct kgsl_cmdbatch *cmdbatch;
bool pending = false;
cmdbatch = _expire_markers(drawctxt);
if (cmdbatch == NULL)
return NULL;
/*
* If the marker isn't expired but the SKIP bit is set
* then there are real commands following this one in
* the queue. This means that we need to dispatch the
* command so that we can keep the timestamp accounting
* correct. If skip isn't set then we block this queue
* until the dependent timestamp expires
*/
if ((cmdbatch->flags & KGSL_CMDBATCH_MARKER) &&
(!test_bit(CMDBATCH_FLAG_SKIP, &cmdbatch->priv)))
pending = true;
if (kgsl_cmdbatch_events_pending(cmdbatch))
pending = true;
/*
* If changes are pending and the canary timer hasn't been
* started yet, start it
*/
if (pending) {
/*
* If syncpoints are pending start the canary timer if
* it hasn't already been started
*/
if (!cmdbatch->timeout_jiffies) {
cmdbatch->timeout_jiffies =
jiffies + msecs_to_jiffies(5000);
mod_timer(&cmdbatch->timer, cmdbatch->timeout_jiffies);
}
return ERR_PTR(-EAGAIN);
}
_pop_cmdbatch(drawctxt);
return cmdbatch;
}
/**
* adreno_dispatcher_get_cmdbatch() - Get a new command from a context queue
* @drawctxt: Pointer to the adreno draw context
*
* Dequeue a new command batch from the context list
*/
static struct kgsl_cmdbatch *adreno_dispatcher_get_cmdbatch(
struct adreno_context *drawctxt)
{
struct kgsl_cmdbatch *cmdbatch;
spin_lock(&drawctxt->lock);
cmdbatch = _get_cmdbatch(drawctxt);
spin_unlock(&drawctxt->lock);
/*
* Delete the timer and wait for timer handler to finish executing
* on another core before queueing the buffer. We must do this
* without holding any spin lock that the timer handler might be using
*/
if (!IS_ERR_OR_NULL(cmdbatch))
del_timer_sync(&cmdbatch->timer);
return cmdbatch;
}
/**
* adreno_dispatcher_requeue_cmdbatch() - Put a command back on the context
* queue
* @drawctxt: Pointer to the adreno draw context
* @cmdbatch: Pointer to the KGSL cmdbatch to requeue
*
* Failure to submit a command to the ringbuffer isn't the fault of the command
* being submitted so if a failure happens, push it back on the head of the the
* context queue to be reconsidered again unless the context got detached.
*/
static inline int adreno_dispatcher_requeue_cmdbatch(
struct adreno_context *drawctxt, struct kgsl_cmdbatch *cmdbatch)
{
unsigned int prev;
spin_lock(&drawctxt->lock);
if (kgsl_context_detached(&drawctxt->base) ||
kgsl_context_invalid(&drawctxt->base)) {
spin_unlock(&drawctxt->lock);
/* get rid of this cmdbatch since the context is bad */
kgsl_cmdbatch_destroy(cmdbatch);
return -ENOENT;
}
prev = drawctxt->cmdqueue_head == 0 ?
(ADRENO_CONTEXT_CMDQUEUE_SIZE - 1) :
(drawctxt->cmdqueue_head - 1);
/*
* The maximum queue size always needs to be one less then the size of
* the ringbuffer queue so there is "room" to put the cmdbatch back in
*/
BUG_ON(prev == drawctxt->cmdqueue_tail);
drawctxt->cmdqueue[prev] = cmdbatch;
drawctxt->queued++;
/* Reset the command queue head to reflect the newly requeued change */
drawctxt->cmdqueue_head = prev;
spin_unlock(&drawctxt->lock);
return 0;
}
/**
* dispatcher_queue_context() - Queue a context in the dispatcher pending list
* @dispatcher: Pointer to the adreno dispatcher struct
* @drawctxt: Pointer to the adreno draw context
*
* Add a context to the dispatcher pending list.
*/
static void dispatcher_queue_context(struct adreno_device *adreno_dev,
struct adreno_context *drawctxt)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
/* Refuse to queue a detached context */
if (kgsl_context_detached(&drawctxt->base))
return;
spin_lock(&dispatcher->plist_lock);
if (plist_node_empty(&drawctxt->pending)) {
/* Get a reference to the context while it sits on the list */
if (_kgsl_context_get(&drawctxt->base)) {
trace_dispatch_queue_context(drawctxt);
plist_add(&drawctxt->pending, &dispatcher->pending);
}
}
spin_unlock(&dispatcher->plist_lock);
}
/**
* sendcmd() - Send a command batch to the GPU hardware
* @dispatcher: Pointer to the adreno dispatcher struct
* @cmdbatch: Pointer to the KGSL cmdbatch being sent
*
* Send a KGSL command batch to the GPU hardware
*/
static int sendcmd(struct adreno_device *adreno_dev,
struct kgsl_cmdbatch *cmdbatch)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_gpudev *gpudev = ADRENO_GPU_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
struct adreno_context *drawctxt = ADRENO_CONTEXT(cmdbatch->context);
struct adreno_dispatcher_cmdqueue *dispatch_q =
ADRENO_CMDBATCH_DISPATCH_CMDQUEUE(cmdbatch);
struct kgsl_thread_private *thread = drawctxt->base.thread_priv;
struct adreno_submit_time time;
uint64_t secs = 0;
unsigned long nsecs = 0;
int ret;
mutex_lock(&device->mutex);
if (adreno_gpu_halt(adreno_dev) != 0) {
mutex_unlock(&device->mutex);
return -EBUSY;
}
dispatcher->inflight++;
dispatch_q->inflight++;
if (dispatcher->inflight == 1 &&
!test_bit(ADRENO_DISPATCHER_POWER, &dispatcher->priv)) {
/* Time to make the donuts. Turn on the GPU */
ret = kgsl_active_count_get(device);
if (ret) {
dispatcher->inflight--;
dispatch_q->inflight--;
mutex_unlock(&device->mutex);
return ret;
}
set_bit(ADRENO_DISPATCHER_POWER, &dispatcher->priv);
}
if (test_bit(ADRENO_DEVICE_CMDBATCH_PROFILE, &adreno_dev->priv)) {
set_bit(CMDBATCH_FLAG_PROFILE, &cmdbatch->priv);
cmdbatch->profile_index = adreno_dev->cmdbatch_profile_index;
adreno_dev->cmdbatch_profile_index =
(adreno_dev->cmdbatch_profile_index + 1) %
ADRENO_CMDBATCH_PROFILE_COUNT;
}
ret = adreno_ringbuffer_submitcmd(adreno_dev, cmdbatch, &time);
/*
* On the first command, if the submission was successful, then read the
* fault registers. If it failed then turn off the GPU. Sad face.
*/
if (dispatcher->inflight == 1) {
if (ret == 0) {
/* Stop fault timer before reading fault registers */
del_timer_sync(&dispatcher->fault_timer);
fault_detect_read(adreno_dev);
/* Start the fault timer on first submission */
start_fault_timer(adreno_dev);
if (!test_and_set_bit(ADRENO_DISPATCHER_ACTIVE,
&dispatcher->priv))
reinit_completion(&dispatcher->idle_gate);
} else {
kgsl_active_count_put(device);
clear_bit(ADRENO_DISPATCHER_POWER, &dispatcher->priv);
}
}
if (ret) {
dispatcher->inflight--;
dispatch_q->inflight--;
mutex_unlock(&device->mutex);
/*
* Don't log a message in case of:
* -ENOENT means that the context was detached before the
* command was submitted
* -ENOSPC means that there temporarily isn't any room in the
* ringbuffer
* -PROTO means that a fault is currently being worked
*/
if (ret != -ENOENT && ret != -ENOSPC && ret != -EPROTO)
KGSL_DRV_ERR(device,
"Unable to submit command to the ringbuffer %d\n",
ret);
return ret;
}
secs = time.ktime;
nsecs = do_div(secs, 1000000000);
thread->sync_ktime = time.ktime;
thread->sync_ticks = time.ticks;
thread->stats[KGSL_THREADSTATS_SUBMITTED] = time.ktime;
thread->stats[KGSL_THREADSTATS_SUBMITTED_ID] = cmdbatch->timestamp;
thread->stats[KGSL_THREADSTATS_SUBMITTED_COUNT]++;
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_SUBMITTED]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_SUBMITTED_ID]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_SUBMITTED_COUNT]);
trace_adreno_cmdbatch_submitted(cmdbatch, (int) dispatcher->inflight,
time.ticks, (unsigned long) secs, nsecs / 1000, drawctxt->rb,
adreno_get_rptr(drawctxt->rb));
mutex_unlock(&device->mutex);
cmdbatch->submit_ticks = time.ticks;
dispatch_q->cmd_q[dispatch_q->tail] = cmdbatch;
dispatch_q->tail = (dispatch_q->tail + 1) %
ADRENO_DISPATCH_CMDQUEUE_SIZE;
/*
* For the first submission in any given command queue update the
* expected expire time - this won't actually be used / updated until
* the command queue in question goes current, but universally setting
* it here avoids the possibilty of some race conditions with preempt
*/
if (dispatch_q->inflight == 1)
dispatch_q->expires = jiffies +
msecs_to_jiffies(adreno_cmdbatch_timeout);
/*
* If we believe ourselves to be current and preemption isn't a thing,
* then set up the timer. If this misses, then preemption is indeed a
* thing and the timer will be set up in due time
*/
if (!adreno_in_preempt_state(adreno_dev, ADRENO_PREEMPT_NONE)) {
if (cmdqueue_is_current(dispatch_q))
mod_timer(&dispatcher->timer, dispatch_q->expires);
}
/*
* we just submitted something, readjust ringbuffer
* execution level
*/
if (gpudev->preemption_schedule)
gpudev->preemption_schedule(adreno_dev);
return 0;
}
/**
* dispatcher_context_sendcmds() - Send commands from a context to the GPU
* @adreno_dev: Pointer to the adreno device struct
* @drawctxt: Pointer to the adreno context to dispatch commands from
*
* Dequeue and send a burst of commands from the specified context to the GPU
* Returns postive if the context needs to be put back on the pending queue
* 0 if the context is empty or detached and negative on error
*/
static int dispatcher_context_sendcmds(struct adreno_device *adreno_dev,
struct adreno_context *drawctxt)
{
struct adreno_dispatcher_cmdqueue *dispatch_q =
&(drawctxt->rb->dispatch_q);
int count = 0;
int ret = 0;
int inflight = _cmdqueue_inflight(dispatch_q);
unsigned int timestamp;
if (dispatch_q->inflight >= inflight) {
expire_markers(drawctxt);
return -EBUSY;
}
/*
* Each context can send a specific number of command batches per cycle
*/
while ((count < _context_cmdbatch_burst) &&
(dispatch_q->inflight < inflight)) {
struct kgsl_cmdbatch *cmdbatch;
if (adreno_gpu_fault(adreno_dev) != 0)
break;
cmdbatch = adreno_dispatcher_get_cmdbatch(drawctxt);
/*
* adreno_context_get_cmdbatch returns -EAGAIN if the current
* cmdbatch has pending sync points so no more to do here.
* When the sync points are satisfied then the context will get
* reqeueued
*/
if (IS_ERR_OR_NULL(cmdbatch)) {
if (IS_ERR(cmdbatch))
ret = PTR_ERR(cmdbatch);
break;
}
/*
* If this is a synchronization submission then there are no
* commands to submit. Discard it and get the next item from
* the queue. Decrement count so this packet doesn't count
* against the burst for the context
*/
if (cmdbatch->flags & KGSL_CMDBATCH_SYNC) {
kgsl_cmdbatch_destroy(cmdbatch);
continue;
}
timestamp = cmdbatch->timestamp;
ret = sendcmd(adreno_dev, cmdbatch);
/*
* On error from sendcmd() try to requeue the command batch
* unless we got back -ENOENT which means that the context has
* been detached and there will be no more deliveries from here
*/
if (ret != 0) {
/* Destroy the cmdbatch on -ENOENT */
if (ret == -ENOENT)
kgsl_cmdbatch_destroy(cmdbatch);
else {
/*
* If the requeue returns an error, return that
* instead of whatever sendcmd() sent us
*/
int r = adreno_dispatcher_requeue_cmdbatch(
drawctxt, cmdbatch);
if (r)
ret = r;
}
break;
}
drawctxt->submitted_timestamp = timestamp;
count++;
}
/*
* Wake up any snoozing threads if we have consumed any real commands
* or marker commands and we have room in the context queue.
*/
if (_check_context_queue(drawctxt))
wake_up_all(&drawctxt->wq);
if (!ret)
ret = count;
/* Return error or the number of commands queued */
return ret;
}
/**
* _adreno_dispatcher_issuecmds() - Issue commmands from pending contexts
* @adreno_dev: Pointer to the adreno device struct
*
* Issue as many commands as possible (up to inflight) from the pending contexts
* This function assumes the dispatcher mutex has been locked.
*/
static void _adreno_dispatcher_issuecmds(struct adreno_device *adreno_dev)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
struct adreno_context *drawctxt, *next;
struct plist_head requeue, busy_list;
int ret;
/* Leave early if the dispatcher isn't in a happy state */
if (adreno_gpu_fault(adreno_dev) != 0)
return;
plist_head_init(&requeue);
plist_head_init(&busy_list);
/* Try to fill the ringbuffers as much as possible */
while (1) {
/* Stop doing things if the dispatcher is paused or faulted */
if (adreno_gpu_fault(adreno_dev) != 0)
break;
if (0 != adreno_gpu_halt(adreno_dev))
break;
spin_lock(&dispatcher->plist_lock);
if (plist_head_empty(&dispatcher->pending)) {
spin_unlock(&dispatcher->plist_lock);
break;
}
/* Get the next entry on the list */
drawctxt = plist_first_entry(&dispatcher->pending,
struct adreno_context, pending);
plist_del(&drawctxt->pending, &dispatcher->pending);
spin_unlock(&dispatcher->plist_lock);
if (kgsl_context_detached(&drawctxt->base) ||
kgsl_context_invalid(&drawctxt->base)) {
kgsl_context_put(&drawctxt->base);
continue;
}
ret = dispatcher_context_sendcmds(adreno_dev, drawctxt);
/* Don't bother requeuing on -ENOENT - context is detached */
if (ret != 0 && ret != -ENOENT) {
spin_lock(&dispatcher->plist_lock);
/*
* Check to seen if the context had been requeued while
* we were processing it (probably by another thread
* pushing commands). If it has then shift it to the
* requeue list if it was not able to submit commands
* due to the dispatch_q being full. Also, do a put to
* make sure the reference counting stays accurate.
* If the node is empty then we will put it on the
* requeue list and not touch the refcount since we
* already hold it from the first time it went on the
* list.
*/
if (!plist_node_empty(&drawctxt->pending)) {
plist_del(&drawctxt->pending,
&dispatcher->pending);
kgsl_context_put(&drawctxt->base);
}
if (ret == -EBUSY)
/* Inflight queue is full */
plist_add(&drawctxt->pending, &busy_list);
else
plist_add(&drawctxt->pending, &requeue);
spin_unlock(&dispatcher->plist_lock);
} else {
/*
* If the context doesn't need be requeued put back the
* refcount
*/
kgsl_context_put(&drawctxt->base);
}
}
spin_lock(&dispatcher->plist_lock);
/* Put the contexts that couldn't submit back on the pending list */
plist_for_each_entry_safe(drawctxt, next, &busy_list, pending) {
plist_del(&drawctxt->pending, &busy_list);
plist_add(&drawctxt->pending, &dispatcher->pending);
}
/* Now put the contexts that need to be requeued back on the list */
plist_for_each_entry_safe(drawctxt, next, &requeue, pending) {
plist_del(&drawctxt->pending, &requeue);
plist_add(&drawctxt->pending, &dispatcher->pending);
}
spin_unlock(&dispatcher->plist_lock);
}
/**
* adreno_dispatcher_issuecmds() - Issue commmands from pending contexts
* @adreno_dev: Pointer to the adreno device struct
*
* Lock the dispatcher and call _adreno_dispatcher_issueibcmds
*/
static void adreno_dispatcher_issuecmds(struct adreno_device *adreno_dev)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
/* If the dispatcher is busy then schedule the work for later */
if (!mutex_trylock(&dispatcher->mutex)) {
adreno_dispatcher_schedule(KGSL_DEVICE(adreno_dev));
return;
}
_adreno_dispatcher_issuecmds(adreno_dev);
mutex_unlock(&dispatcher->mutex);
}
/**
* get_timestamp() - Return the next timestamp for the context
* @drawctxt - Pointer to an adreno draw context struct
* @cmdbatch - Pointer to a command batch
* @timestamp - Pointer to a timestamp value possibly passed from the user
*
* Assign a timestamp based on the settings of the draw context and the command
* batch.
*/
static int get_timestamp(struct adreno_context *drawctxt,
struct kgsl_cmdbatch *cmdbatch, unsigned int *timestamp)
{
/* Synchronization commands don't get a timestamp */
if (cmdbatch->flags & KGSL_CMDBATCH_SYNC) {
*timestamp = 0;
return 0;
}
if (drawctxt->base.flags & KGSL_CONTEXT_USER_GENERATED_TS) {
/*
* User specified timestamps need to be greater than the last
* issued timestamp in the context
*/
if (timestamp_cmp(drawctxt->timestamp, *timestamp) >= 0)
return -ERANGE;
drawctxt->timestamp = *timestamp;
} else
drawctxt->timestamp++;
*timestamp = drawctxt->timestamp;
return 0;
}
/**
* adreno_dispactcher_queue_cmd() - Queue a new command in the context
* @adreno_dev: Pointer to the adreno device struct
* @drawctxt: Pointer to the adreno draw context
* @cmdbatch: Pointer to the command batch being submitted
* @timestamp: Pointer to the requested timestamp
*
* Queue a command in the context - if there isn't any room in the queue, then
* block until there is
*/
int adreno_dispatcher_queue_cmd(struct adreno_device *adreno_dev,
struct adreno_context *drawctxt, struct kgsl_cmdbatch *cmdbatch,
uint32_t *timestamp)
{
struct adreno_dispatcher_cmdqueue *dispatch_q =
ADRENO_CMDBATCH_DISPATCH_CMDQUEUE(cmdbatch);
struct kgsl_thread_private *thread = drawctxt->base.thread_priv;
int ret;
spin_lock(&drawctxt->lock);
if (kgsl_context_detached(&drawctxt->base)) {
spin_unlock(&drawctxt->lock);
return -ENOENT;
}
/*
* Force the preamble for this submission only - this is usually
* requested by the dispatcher as part of fault recovery
*/
if (test_and_clear_bit(ADRENO_CONTEXT_FORCE_PREAMBLE,
&drawctxt->base.priv))
set_bit(CMDBATCH_FLAG_FORCE_PREAMBLE, &cmdbatch->priv);
/*
* Force the premable if set from userspace in the context or cmdbatch
* flags
*/
if ((drawctxt->base.flags & KGSL_CONTEXT_CTX_SWITCH) ||
(cmdbatch->flags & KGSL_CMDBATCH_CTX_SWITCH))
set_bit(CMDBATCH_FLAG_FORCE_PREAMBLE, &cmdbatch->priv);
/* Skip this cmdbatch commands if IFH_NOP is enabled */
if (drawctxt->base.flags & KGSL_CONTEXT_IFH_NOP)
set_bit(CMDBATCH_FLAG_SKIP, &cmdbatch->priv);
/*
* If we are waiting for the end of frame and it hasn't appeared yet,
* then mark the command batch as skipped. It will still progress
* through the pipeline but it won't actually send any commands
*/
if (test_bit(ADRENO_CONTEXT_SKIP_EOF, &drawctxt->base.priv)) {
set_bit(CMDBATCH_FLAG_SKIP, &cmdbatch->priv);
/*
* If this command batch represents the EOF then clear the way
* for the dispatcher to continue submitting
*/
if (cmdbatch->flags & KGSL_CMDBATCH_END_OF_FRAME) {
clear_bit(ADRENO_CONTEXT_SKIP_EOF,
&drawctxt->base.priv);
/*
* Force the preamble on the next command to ensure that
* the state is correct
*/
set_bit(ADRENO_CONTEXT_FORCE_PREAMBLE,
&drawctxt->base.priv);
}
}
/* Wait for room in the context queue */
while (drawctxt->queued >= _context_cmdqueue_size) {
trace_adreno_drawctxt_sleep(drawctxt);
spin_unlock(&drawctxt->lock);
ret = wait_event_interruptible_timeout(drawctxt->wq,
_check_context_queue(drawctxt),
msecs_to_jiffies(_context_queue_wait));
spin_lock(&drawctxt->lock);
trace_adreno_drawctxt_wake(drawctxt);
if (ret <= 0) {
spin_unlock(&drawctxt->lock);
return (ret == 0) ? -ETIMEDOUT : (int) ret;
}
}
/*
* Account for the possiblity that the context got invalidated
* while we were sleeping
*/
if (kgsl_context_invalid(&drawctxt->base)) {
spin_unlock(&drawctxt->lock);
return -EDEADLK;
}
if (kgsl_context_detached(&drawctxt->base)) {
spin_unlock(&drawctxt->lock);
return -ENOENT;
}
ret = get_timestamp(drawctxt, cmdbatch, timestamp);
if (ret) {
spin_unlock(&drawctxt->lock);
return ret;
}
cmdbatch->timestamp = *timestamp;
if (cmdbatch->flags & KGSL_CMDBATCH_MARKER) {
/*
* See if we can fastpath this thing - if nothing is queued
* and nothing is inflight retire without bothering the GPU
*/
if (!drawctxt->queued && kgsl_check_timestamp(cmdbatch->device,
cmdbatch->context, drawctxt->queued_timestamp)) {
trace_adreno_cmdbatch_queued(cmdbatch,
drawctxt->queued);
_retire_marker(cmdbatch);
spin_unlock(&drawctxt->lock);
return 0;
}
/*
* Remember the last queued timestamp - the marker will block
* until that timestamp is expired (unless another command
* comes along and forces the marker to execute)
*/
cmdbatch->marker_timestamp = drawctxt->queued_timestamp;
}
/* SYNC commands have timestamp 0 and will get optimized out anyway */
if (!(cmdbatch->flags & KGSL_CONTEXT_SYNC))
drawctxt->queued_timestamp = *timestamp;
/*
* Set the fault tolerance policy for the command batch - assuming the
* context hasn't disabled FT use the current device policy
*/
if (drawctxt->base.flags & KGSL_CONTEXT_NO_FAULT_TOLERANCE)
set_bit(KGSL_FT_DISABLE, &cmdbatch->fault_policy);
else
cmdbatch->fault_policy = adreno_dev->ft_policy;
/* Put the command into the queue */
drawctxt->cmdqueue[drawctxt->cmdqueue_tail] = cmdbatch;
drawctxt->cmdqueue_tail = (drawctxt->cmdqueue_tail + 1) %
ADRENO_CONTEXT_CMDQUEUE_SIZE;
/*
* If this is a real command then we need to force any markers queued
* before it to dispatch to keep time linear - set the skip bit so
* the commands get NOPed.
*/
if (!(cmdbatch->flags & KGSL_CMDBATCH_MARKER)) {
unsigned int i = drawctxt->cmdqueue_head;
while (i != drawctxt->cmdqueue_tail) {
if (drawctxt->cmdqueue[i]->flags & KGSL_CMDBATCH_MARKER)
set_bit(CMDBATCH_FLAG_SKIP,
&drawctxt->cmdqueue[i]->priv);
i = CMDQUEUE_NEXT(i, ADRENO_CONTEXT_CMDQUEUE_SIZE);
}
}
drawctxt->queued++;
thread->stats[KGSL_THREADSTATS_QUEUED] = local_clock();
thread->stats[KGSL_THREADSTATS_QUEUED_ID] = cmdbatch->timestamp;
thread->stats[KGSL_THREADSTATS_QUEUED_COUNT]++;
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_QUEUED]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_QUEUED_ID]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_QUEUED_COUNT]);
trace_adreno_cmdbatch_queued(cmdbatch, drawctxt->queued);
_track_context(adreno_dev, dispatch_q, drawctxt);
spin_unlock(&drawctxt->lock);
kgsl_pwrctrl_update_l2pc(&adreno_dev->dev);
/* Add the context to the dispatcher pending list */
dispatcher_queue_context(adreno_dev, drawctxt);
/*
* Only issue commands if inflight is less than burst -this prevents us
* from sitting around waiting for the mutex on a busy system - the work
* loop will schedule it for us. Inflight is mutex protected but the
* worse that can happen is that it will go to 0 after we check and if
* it goes to 0 it is because the work loop decremented it and the work
* queue will try to schedule new commands anyway.
*/
if (dispatch_q->inflight < _context_cmdbatch_burst) {
/*
* If called on a high priority context, try to issue commands
* immediately, otherwise queue it on the kthread. This avoids
* submission delays due to priority inversion when a low-pri
* thread gets preempted after acquiring the dispatcher mutex.
*/
if (kgsl_context_high_priority(&drawctxt->base))
adreno_dispatcher_issuecmds(adreno_dev);
else
adreno_dispatcher_schedule(KGSL_DEVICE(adreno_dev));
}
return 0;
}
static int _mark_context(int id, void *ptr, void *data)
{
unsigned int guilty = *((unsigned int *) data);
struct kgsl_context *context = ptr;
/*
* If the context is guilty mark it as such. Otherwise mark it as
* innocent if it had not already been marked as guilty. If id is
* passed as 0 then mark EVERYBODY guilty (recovery failed)
*/
if (guilty == 0 || guilty == context->id)
context->reset_status =
KGSL_CTX_STAT_GUILTY_CONTEXT_RESET_EXT;
else if (context->reset_status !=
KGSL_CTX_STAT_GUILTY_CONTEXT_RESET_EXT)
context->reset_status =
KGSL_CTX_STAT_INNOCENT_CONTEXT_RESET_EXT;
return 0;
}
/**
* mark_guilty_context() - Mark the given context as guilty (failed recovery)
* @device: Pointer to a KGSL device structure
* @id: Context ID of the guilty context (or 0 to mark all as guilty)
*
* Mark the given (or all) context(s) as guilty (failed recovery)
*/
static void mark_guilty_context(struct kgsl_device *device, unsigned int id)
{
/* Mark the status for all the contexts in the device */
read_lock(&device->context_lock);
idr_for_each(&device->context_idr, _mark_context, &id);
read_unlock(&device->context_lock);
}
/*
* If an IB inside of the command batch has a gpuaddr that matches the base
* passed in then zero the size which effectively skips it when it is submitted
* in the ringbuffer.
*/
static void cmdbatch_skip_ib(struct kgsl_cmdbatch *cmdbatch, uint64_t base)
{
struct kgsl_memobj_node *ib;
list_for_each_entry(ib, &cmdbatch->cmdlist, node) {
if (ib->gpuaddr == base) {
ib->priv |= MEMOBJ_SKIP;
if (base)
return;
}
}
}
static void cmdbatch_skip_cmd(struct kgsl_cmdbatch *cmdbatch,
struct kgsl_cmdbatch **replay, int count)
{
struct adreno_context *drawctxt = ADRENO_CONTEXT(cmdbatch->context);
int i;
/*
* SKIPCMD policy: next IB issued for this context is tentative
* if it fails we assume that GFT failed and if it succeeds
* we mark GFT as a success.
*
* Find next commandbatch for the faulting context
* If commandbatch is found
* a) store the current commandbatch fault_policy in context's next
* commandbatch fault_policy
* b) force preamble for next commandbatch
*/
for (i = 1; i < count; i++) {
if (replay[i]->context->id == cmdbatch->context->id) {
replay[i]->fault_policy = replay[0]->fault_policy;
set_bit(CMDBATCH_FLAG_FORCE_PREAMBLE, &replay[i]->priv);
set_bit(KGSL_FT_SKIPCMD, &replay[i]->fault_recovery);
break;
}
}
/*
* If we did not find the next cmd then
* a) set a flag for next command issued in this context
* b) store the fault_policy, this fault_policy becomes the policy of
* next command issued in this context
*/
if ((i == count) && drawctxt) {
set_bit(ADRENO_CONTEXT_SKIP_CMD, &drawctxt->base.priv);
drawctxt->fault_policy = replay[0]->fault_policy;
}
/* set the flags to skip this cmdbatch */
set_bit(CMDBATCH_FLAG_SKIP, &cmdbatch->priv);
cmdbatch->fault_recovery = 0;
}
static void cmdbatch_skip_frame(struct kgsl_cmdbatch *cmdbatch,
struct kgsl_cmdbatch **replay, int count)
{
struct adreno_context *drawctxt = ADRENO_CONTEXT(cmdbatch->context);
int skip = 1;
int i;
for (i = 0; i < count; i++) {
/*
* Only operate on command batches that belong to the
* faulting context
*/
if (replay[i]->context->id != cmdbatch->context->id)
continue;
/*
* Skip all the command batches in this context until
* the EOF flag is seen. If the EOF flag is seen then
* force the preamble for the next command.
*/
if (skip) {
set_bit(CMDBATCH_FLAG_SKIP, &replay[i]->priv);
if (replay[i]->flags & KGSL_CMDBATCH_END_OF_FRAME)
skip = 0;
} else {
set_bit(CMDBATCH_FLAG_FORCE_PREAMBLE, &replay[i]->priv);
return;
}
}
/*
* If the EOF flag hasn't been seen yet then set the flag in the
* drawctxt to keep looking for it
*/
if (skip && drawctxt)
set_bit(ADRENO_CONTEXT_SKIP_EOF, &drawctxt->base.priv);
/*
* If we did see the EOF flag then force the preamble on for the
* next command issued on this context
*/
if (!skip && drawctxt)
set_bit(ADRENO_CONTEXT_FORCE_PREAMBLE, &drawctxt->base.priv);
}
static void remove_invalidated_cmdbatches(struct kgsl_device *device,
struct kgsl_cmdbatch **replay, int count)
{
int i;
for (i = 0; i < count; i++) {
struct kgsl_cmdbatch *cmd = replay[i];
if (cmd == NULL)
continue;
if (kgsl_context_detached(cmd->context) ||
kgsl_context_invalid(cmd->context)) {
replay[i] = NULL;
mutex_lock(&device->mutex);
kgsl_cancel_events_timestamp(device,
&cmd->context->events, cmd->timestamp);
mutex_unlock(&device->mutex);
kgsl_cmdbatch_destroy(cmd);
}
}
}
static char _pidname[TASK_COMM_LEN];
static inline const char *_kgsl_context_comm(struct kgsl_context *context)
{
if (context && context->proc_priv)
strlcpy(_pidname, context->proc_priv->comm, sizeof(_pidname));
else
snprintf(_pidname, TASK_COMM_LEN, "unknown");
return _pidname;
}
#define pr_fault(_d, _c, fmt, args...) \
dev_err((_d)->dev, "%s[%d]: " fmt, \
_kgsl_context_comm((_c)->context), \
pid_nr((_c)->context->proc_priv->pid), ##args)
static void adreno_fault_header(struct kgsl_device *device,
struct adreno_ringbuffer *rb, struct kgsl_cmdbatch *cmdbatch)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
unsigned int status, rptr, wptr, ib1sz, ib2sz;
uint64_t ib1base, ib2base;
adreno_readreg(adreno_dev , ADRENO_REG_RBBM_STATUS, &status);
adreno_readreg(adreno_dev, ADRENO_REG_CP_RB_RPTR, &rptr);
adreno_readreg(adreno_dev, ADRENO_REG_CP_RB_WPTR, &wptr);
adreno_readreg64(adreno_dev, ADRENO_REG_CP_IB1_BASE,
ADRENO_REG_CP_IB1_BASE_HI, &ib1base);
adreno_readreg(adreno_dev, ADRENO_REG_CP_IB1_BUFSZ, &ib1sz);
adreno_readreg64(adreno_dev, ADRENO_REG_CP_IB2_BASE,
ADRENO_REG_CP_IB2_BASE_HI, &ib2base);
adreno_readreg(adreno_dev, ADRENO_REG_CP_IB2_BUFSZ, &ib2sz);
if (cmdbatch != NULL) {
struct adreno_context *drawctxt =
ADRENO_CONTEXT(cmdbatch->context);
trace_adreno_gpu_fault(cmdbatch->context->id,
cmdbatch->timestamp,
status, rptr, wptr, ib1base, ib1sz,
ib2base, ib2sz, drawctxt->rb->id);
pr_fault(device, cmdbatch,
"gpu fault ctx %d ts %d status %8.8X rb %4.4x/%4.4x ib1 %16.16llX/%4.4x ib2 %16.16llX/%4.4x\n",
cmdbatch->context->id, cmdbatch->timestamp, status,
rptr, wptr, ib1base, ib1sz, ib2base, ib2sz);
if (rb != NULL)
pr_fault(device, cmdbatch,
"gpu fault rb %d rb sw r/w %4.4x/%4.4x\n",
rb->id, rptr, rb->wptr);
} else {
int id = (rb != NULL) ? rb->id : -1;
dev_err(device->dev,
"RB[%d]: gpu fault status %8.8X rb %4.4x/%4.4x ib1 %16.16llX/%4.4x ib2 %16.16llX/%4.4x\n",
id, status, rptr, wptr, ib1base, ib1sz, ib2base,
ib2sz);
if (rb != NULL)
dev_err(device->dev,
"RB[%d] gpu fault rb sw r/w %4.4x/%4.4x\n",
rb->id, rptr, rb->wptr);
}
}
void adreno_fault_skipcmd_detached(struct adreno_device *adreno_dev,
struct adreno_context *drawctxt,
struct kgsl_cmdbatch *cmdbatch)
{
if (test_bit(ADRENO_CONTEXT_SKIP_CMD, &drawctxt->base.priv) &&
kgsl_context_detached(&drawctxt->base)) {
pr_context(KGSL_DEVICE(adreno_dev), cmdbatch->context,
"gpu detached context %d\n", cmdbatch->context->id);
clear_bit(ADRENO_CONTEXT_SKIP_CMD, &drawctxt->base.priv);
}
}
/**
* process_cmdbatch_fault() - Process a cmdbatch for fault policies
* @device: Device on which the cmdbatch caused a fault
* @replay: List of cmdbatches that are to be replayed on the device. The
* faulting cmdbatch is the first command in the replay list and the remaining
* cmdbatches in the list are commands that were submitted to the same queue
* as the faulting one.
* @count: Number of cmdbatches in replay
* @base: The IB1 base at the time of fault
* @fault: The fault type
*/
static void process_cmdbatch_fault(struct kgsl_device *device,
struct kgsl_cmdbatch **replay, int count,
unsigned int base,
int fault)
{
struct kgsl_cmdbatch *cmdbatch = replay[0];
int i;
char *state = "failed";
/*
* If GFT recovered more than X times in Y ms invalidate the context
* and do not attempt recovery.
* Example: X==3 and Y==3000 ms, GPU hung at 500ms, 1700ms, 25000ms and
* 3000ms for the same context, we will not try FT and invalidate the
* context @3000ms because context triggered GFT more than 3 times in
* last 3 seconds. If a context caused recoverable GPU hangs
* where 1st and 4th gpu hang are more than 3 seconds apart we
* won't disable GFT and invalidate the context.
*/
if (test_bit(KGSL_FT_THROTTLE, &cmdbatch->fault_policy)) {
if (time_after(jiffies, (cmdbatch->context->fault_time
+ msecs_to_jiffies(_fault_throttle_time)))) {
cmdbatch->context->fault_time = jiffies;
cmdbatch->context->fault_count = 1;
} else {
cmdbatch->context->fault_count++;
if (cmdbatch->context->fault_count >
_fault_throttle_burst) {
set_bit(KGSL_FT_DISABLE,
&cmdbatch->fault_policy);
pr_context(device, cmdbatch->context,
"gpu fault threshold exceeded %d faults in %d msecs\n",
_fault_throttle_burst,
_fault_throttle_time);
}
}
}
/*
* If FT is disabled for this cmdbatch invalidate immediately
*/
if (test_bit(KGSL_FT_DISABLE, &cmdbatch->fault_policy) ||
test_bit(KGSL_FT_TEMP_DISABLE, &cmdbatch->fault_policy)) {
state = "skipped";
bitmap_zero(&cmdbatch->fault_policy, BITS_PER_LONG);
}
/* If the context is detached do not run FT on context */
if (kgsl_context_detached(cmdbatch->context)) {
state = "detached";
bitmap_zero(&cmdbatch->fault_policy, BITS_PER_LONG);
}
/*
* Set a flag so we don't print another PM dump if the cmdbatch fails
* again on replay
*/
set_bit(KGSL_FT_SKIP_PMDUMP, &cmdbatch->fault_policy);
/*
* A hardware fault generally means something was deterministically
* wrong with the command batch - no point in trying to replay it
* Clear the replay bit and move on to the next policy level
*/
if (fault & ADRENO_HARD_FAULT)
clear_bit(KGSL_FT_REPLAY, &(cmdbatch->fault_policy));
/*
* A timeout fault means the IB timed out - clear the policy and
* invalidate - this will clear the FT_SKIP_PMDUMP bit but that is okay
* because we won't see this cmdbatch again
*/
if (fault & ADRENO_TIMEOUT_FAULT)
bitmap_zero(&cmdbatch->fault_policy, BITS_PER_LONG);
/*
* If the context had a GPU page fault then it is likely it would fault
* again if replayed
*/
if (test_bit(KGSL_CONTEXT_PRIV_PAGEFAULT,
&cmdbatch->context->priv)) {
/* we'll need to resume the mmu later... */
clear_bit(KGSL_FT_REPLAY, &cmdbatch->fault_policy);
clear_bit(KGSL_CONTEXT_PRIV_PAGEFAULT,
&cmdbatch->context->priv);
}
/*
* Execute the fault tolerance policy. Each command batch stores the
* current fault policy that was set when it was queued.
* As the options are tried in descending priority
* (REPLAY -> SKIPIBS -> SKIPFRAME -> NOTHING) the bits are cleared
* from the cmdbatch policy so the next thing can be tried if the
* change comes around again
*/
/* Replay the hanging command batch again */
if (test_and_clear_bit(KGSL_FT_REPLAY, &cmdbatch->fault_policy)) {
trace_adreno_cmdbatch_recovery(cmdbatch, BIT(KGSL_FT_REPLAY));
set_bit(KGSL_FT_REPLAY, &cmdbatch->fault_recovery);
return;
}
/*
* Skip the last IB1 that was played but replay everything else.
* Note that the last IB1 might not be in the "hung" command batch
* because the CP may have caused a page-fault while it was prefetching
* the next IB1/IB2. walk all outstanding commands and zap the
* supposedly bad IB1 where ever it lurks.
*/
if (test_and_clear_bit(KGSL_FT_SKIPIB, &cmdbatch->fault_policy)) {
trace_adreno_cmdbatch_recovery(cmdbatch, BIT(KGSL_FT_SKIPIB));
set_bit(KGSL_FT_SKIPIB, &cmdbatch->fault_recovery);
for (i = 0; i < count; i++) {
if (replay[i] != NULL &&
replay[i]->context->id == cmdbatch->context->id)
cmdbatch_skip_ib(replay[i], base);
}
return;
}
/* Skip the faulted command batch submission */
if (test_and_clear_bit(KGSL_FT_SKIPCMD, &cmdbatch->fault_policy)) {
trace_adreno_cmdbatch_recovery(cmdbatch, BIT(KGSL_FT_SKIPCMD));
/* Skip faulting command batch */
cmdbatch_skip_cmd(cmdbatch, replay, count);
return;
}
if (test_and_clear_bit(KGSL_FT_SKIPFRAME, &cmdbatch->fault_policy)) {
trace_adreno_cmdbatch_recovery(cmdbatch,
BIT(KGSL_FT_SKIPFRAME));
set_bit(KGSL_FT_SKIPFRAME, &cmdbatch->fault_recovery);
/*
* Skip all the pending command batches for this context until
* the EOF frame is seen
*/
cmdbatch_skip_frame(cmdbatch, replay, count);
return;
}
/* If we get here then all the policies failed */
pr_context(device, cmdbatch->context, "gpu %s ctx %d ts %d\n",
state, cmdbatch->context->id, cmdbatch->timestamp);
/* Mark the context as failed */
mark_guilty_context(device, cmdbatch->context->id);
/* Invalidate the context */
adreno_drawctxt_invalidate(device, cmdbatch->context);
}
/**
* recover_dispatch_q() - Recover all commands in a dispatch queue by
* resubmitting the commands
* @device: Device on which recovery is performed
* @dispatch_q: The command queue to recover
* @fault: Faults caused by the command in the dispatch q
* @base: The IB1 base during the fault
*/
static void recover_dispatch_q(struct kgsl_device *device,
struct adreno_dispatcher_cmdqueue *dispatch_q,
int fault,
unsigned int base)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct kgsl_cmdbatch **replay = NULL;
unsigned int ptr;
int first = 0;
int count = 0;
int i;
/* Allocate memory to store the inflight commands */
replay = kzalloc(sizeof(*replay) * dispatch_q->inflight, GFP_KERNEL);
if (replay == NULL) {
unsigned int ptr = dispatch_q->head;
/* Recovery failed - mark everybody on this q guilty */
while (ptr != dispatch_q->tail) {
struct kgsl_context *context =
dispatch_q->cmd_q[ptr]->context;
mark_guilty_context(device, context->id);
adreno_drawctxt_invalidate(device, context);
kgsl_cmdbatch_destroy(dispatch_q->cmd_q[ptr]);
ptr = CMDQUEUE_NEXT(ptr, ADRENO_DISPATCH_CMDQUEUE_SIZE);
}
/*
* Set the replay count to zero - this will ensure that the
* hardware gets reset but nothing else gets played
*/
count = 0;
goto replay;
}
/* Copy the inflight command batches into the temporary storage */
ptr = dispatch_q->head;
while (ptr != dispatch_q->tail) {
replay[count++] = dispatch_q->cmd_q[ptr];
ptr = CMDQUEUE_NEXT(ptr, ADRENO_DISPATCH_CMDQUEUE_SIZE);
}
if (fault && count)
process_cmdbatch_fault(device, replay,
count, base, fault);
replay:
dispatch_q->inflight = 0;
dispatch_q->head = dispatch_q->tail = 0;
/* Remove any pending command batches that have been invalidated */
remove_invalidated_cmdbatches(device, replay, count);
/* Replay the pending command buffers */
for (i = 0; i < count; i++) {
int ret;
if (replay[i] == NULL)
continue;
/*
* Force the preamble on the first command (if applicable) to
* avoid any strange stage issues
*/
if (first == 0) {
set_bit(CMDBATCH_FLAG_FORCE_PREAMBLE, &replay[i]->priv);
first = 1;
}
/*
* Force each command batch to wait for idle - this avoids weird
* CP parse issues
*/
set_bit(CMDBATCH_FLAG_WFI, &replay[i]->priv);
ret = sendcmd(adreno_dev, replay[i]);
/*
* If sending the command fails, then try to recover by
* invalidating the context
*/
if (ret) {
pr_context(device, replay[i]->context,
"gpu reset failed ctx %d ts %d\n",
replay[i]->context->id, replay[i]->timestamp);
/* Mark this context as guilty (failed recovery) */
mark_guilty_context(device, replay[i]->context->id);
adreno_drawctxt_invalidate(device, replay[i]->context);
remove_invalidated_cmdbatches(device, &replay[i],
count - i);
}
}
/* Clear the fault bit */
clear_bit(ADRENO_DEVICE_FAULT, &adreno_dev->priv);
kfree(replay);
}
static void do_header_and_snapshot(struct kgsl_device *device,
struct adreno_ringbuffer *rb, struct kgsl_cmdbatch *cmdbatch)
{
/* Always dump the snapshot on a non-cmdbatch failure */
if (cmdbatch == NULL) {
adreno_fault_header(device, rb, NULL);
kgsl_device_snapshot(device, NULL);
return;
}
/* Skip everything if the PMDUMP flag is set */
if (test_bit(KGSL_FT_SKIP_PMDUMP, &cmdbatch->fault_policy))
return;
/* Print the fault header */
adreno_fault_header(device, rb, cmdbatch);
if (!(cmdbatch->context->flags & KGSL_CONTEXT_NO_SNAPSHOT))
kgsl_device_snapshot(device, cmdbatch->context);
}
static int dispatcher_do_fault(struct adreno_device *adreno_dev)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
struct adreno_dispatcher_cmdqueue *dispatch_q = NULL, *dispatch_q_temp;
struct adreno_ringbuffer *rb;
struct adreno_ringbuffer *hung_rb = NULL;
unsigned int reg;
uint64_t base;
struct kgsl_cmdbatch *cmdbatch = NULL;
int ret, i;
int fault;
int halt;
fault = atomic_xchg(&dispatcher->fault, 0);
if (fault == 0)
return 0;
/*
* On A5xx, read RBBM_STATUS3:SMMU_STALLED_ON_FAULT (BIT 24) to
* tell if this function was entered after a pagefault. If so, only
* proceed if the fault handler has already run in the IRQ thread,
* else return early to give the fault handler a chance to run.
*/
if (!(fault & ADRENO_IOMMU_PAGE_FAULT) && adreno_is_a5xx(adreno_dev)) {
unsigned int val;
mutex_lock(&device->mutex);
adreno_readreg(adreno_dev, ADRENO_REG_RBBM_STATUS3, &val);
mutex_unlock(&device->mutex);
if (val & BIT(24))
return 0;
}
/* Turn off all the timers */
del_timer_sync(&dispatcher->timer);
del_timer_sync(&dispatcher->fault_timer);
del_timer_sync(&adreno_dev->preempt.timer);
mutex_lock(&device->mutex);
/* hang opcode */
kgsl_cffdump_hang(device);
adreno_readreg64(adreno_dev, ADRENO_REG_CP_RB_BASE,
ADRENO_REG_CP_RB_BASE_HI, &base);
/*
* Force the CP off for anything but a hard fault to make sure it is
* good and stopped
*/
if (!(fault & ADRENO_HARD_FAULT)) {
adreno_readreg(adreno_dev, ADRENO_REG_CP_ME_CNTL, ®);
if (adreno_is_a5xx(adreno_dev))
reg |= 1 | (1 << 1);
else
reg |= (1 << 27) | (1 << 28);
adreno_writereg(adreno_dev, ADRENO_REG_CP_ME_CNTL, reg);
}
/*
* retire cmdbatches from all the dispatch_q's before starting recovery
*/
FOR_EACH_RINGBUFFER(adreno_dev, rb, i) {
adreno_dispatch_retire_cmdqueue(adreno_dev,
&(rb->dispatch_q));
/* Select the active dispatch_q */
if (base == rb->buffer_desc.gpuaddr) {
dispatch_q = &(rb->dispatch_q);
hung_rb = rb;
if (adreno_dev->cur_rb != hung_rb) {
adreno_dev->prev_rb = adreno_dev->cur_rb;
adreno_dev->cur_rb = hung_rb;
}
}
if (ADRENO_DISPATCHER_RB_STARVE_TIMER_ELAPSED ==
rb->starve_timer_state) {
adreno_put_gpu_halt(adreno_dev);
rb->starve_timer_state =
ADRENO_DISPATCHER_RB_STARVE_TIMER_UNINIT;
}
}
if (dispatch_q && !adreno_cmdqueue_is_empty(dispatch_q)) {
cmdbatch = dispatch_q->cmd_q[dispatch_q->head];
trace_adreno_cmdbatch_fault(cmdbatch, fault);
}
adreno_readreg64(adreno_dev, ADRENO_REG_CP_IB1_BASE,
ADRENO_REG_CP_IB1_BASE_HI, &base);
do_header_and_snapshot(device, hung_rb, cmdbatch);
/* Terminate the stalled transaction and resume the IOMMU */
if (fault & ADRENO_IOMMU_PAGE_FAULT)
kgsl_mmu_pagefault_resume(&device->mmu);
/* Reset the dispatcher queue */
dispatcher->inflight = 0;
/* Reset the GPU and make sure halt is not set during recovery */
halt = adreno_gpu_halt(adreno_dev);
adreno_clear_gpu_halt(adreno_dev);
/*
* If there is a stall in the ringbuffer after all commands have been
* retired then we could hit problems if contexts are waiting for
* internal timestamps that will never retire
*/
if (hung_rb != NULL) {
kgsl_sharedmem_writel(device, &device->memstore,
MEMSTORE_RB_OFFSET(hung_rb, soptimestamp),
hung_rb->timestamp);
kgsl_sharedmem_writel(device, &device->memstore,
MEMSTORE_RB_OFFSET(hung_rb, eoptimestamp),
hung_rb->timestamp);
/* Schedule any pending events to be run */
kgsl_process_event_group(device, &hung_rb->events);
}
ret = adreno_reset(device, fault);
mutex_unlock(&device->mutex);
/* if any other fault got in until reset then ignore */
atomic_set(&dispatcher->fault, 0);
/* If adreno_reset() fails then what hope do we have for the future? */
BUG_ON(ret);
/* recover all the dispatch_q's starting with the one that hung */
if (dispatch_q)
recover_dispatch_q(device, dispatch_q, fault, base);
FOR_EACH_RINGBUFFER(adreno_dev, rb, i) {
dispatch_q_temp = &(rb->dispatch_q);
if (dispatch_q_temp != dispatch_q)
recover_dispatch_q(device, dispatch_q_temp, 0, base);
}
atomic_add(halt, &adreno_dev->halt);
return 1;
}
static inline int cmdbatch_consumed(struct kgsl_cmdbatch *cmdbatch,
unsigned int consumed, unsigned int retired)
{
return ((timestamp_cmp(cmdbatch->timestamp, consumed) >= 0) &&
(timestamp_cmp(retired, cmdbatch->timestamp) < 0));
}
static void _print_recovery(struct kgsl_device *device,
struct kgsl_cmdbatch *cmdbatch)
{
static struct {
unsigned int mask;
const char *str;
} flags[] = { ADRENO_FT_TYPES };
int i, nr = find_first_bit(&cmdbatch->fault_recovery, BITS_PER_LONG);
char *result = "unknown";
for (i = 0; i < ARRAY_SIZE(flags); i++) {
if (flags[i].mask == BIT(nr)) {
result = (char *) flags[i].str;
break;
}
}
pr_context(device, cmdbatch->context,
"gpu %s ctx %d ts %d policy %lX\n",
result, cmdbatch->context->id, cmdbatch->timestamp,
cmdbatch->fault_recovery);
}
static void cmdbatch_profile_ticks(struct adreno_device *adreno_dev,
struct kgsl_cmdbatch *cmdbatch, uint64_t *start, uint64_t *retire)
{
void *ptr = adreno_dev->cmdbatch_profile_buffer.hostptr;
struct adreno_cmdbatch_profile_entry *entry;
entry = (struct adreno_cmdbatch_profile_entry *)
(ptr + (cmdbatch->profile_index * sizeof(*entry)));
rmb();
*start = entry->started;
*retire = entry->retired;
}
static void retire_cmdbatch(struct adreno_device *adreno_dev,
struct kgsl_cmdbatch *cmdbatch)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
struct adreno_context *drawctxt = ADRENO_CONTEXT(cmdbatch->context);
struct kgsl_thread_private *thread = drawctxt->base.thread_priv;
uint64_t start = 0, end = 0;
if (cmdbatch->fault_recovery != 0) {
set_bit(ADRENO_CONTEXT_FAULT, &cmdbatch->context->priv);
_print_recovery(KGSL_DEVICE(adreno_dev), cmdbatch);
}
if (test_bit(CMDBATCH_FLAG_PROFILE, &cmdbatch->priv)) {
cmdbatch_profile_ticks(adreno_dev, cmdbatch, &start, &end);
/*
* Calculate the time delta from the sync in nsecs by converting
* from GPU ticks (which operates on a 19.2 MHz timer) and
* add that to the sync ktime.
*/
thread->stats[KGSL_THREADSTATS_SUBMITTED] = thread->sync_ktime +
(start - thread->sync_ticks) * 10000 / 192;
thread->stats[KGSL_THREADSTATS_RETIRED] = thread->sync_ktime +
(end - thread->sync_ticks) * 10000 / 192;
thread->stats[KGSL_THREADSTATS_ACTIVE_TIME] +=
(end - start) * 10000 / 192;
}
thread->stats[KGSL_THREADSTATS_RETIRED_ID] = cmdbatch->timestamp;
thread->stats[KGSL_THREADSTATS_RETIRED_COUNT]++;
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_RETIRED]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_RETIRED_ID]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_RETIRED_COUNT]);
sysfs_notify_dirent(thread->event_sd[KGSL_THREADSTATS_ACTIVE_TIME]);
/*
* For A3xx we still get the rptr from the CP_RB_RPTR instead of
* rptr scratch out address. At this point GPU clocks turned off.
* So avoid reading GPU register directly for A3xx.
*/
if (adreno_is_a3xx(adreno_dev))
trace_adreno_cmdbatch_retired(cmdbatch,
(int) dispatcher->inflight, start, end,
ADRENO_CMDBATCH_RB(cmdbatch), 0);
else
trace_adreno_cmdbatch_retired(cmdbatch,
(int) dispatcher->inflight, start, end,
ADRENO_CMDBATCH_RB(cmdbatch),
adreno_get_rptr(drawctxt->rb));
drawctxt->submit_retire_ticks[drawctxt->ticks_index] =
end - cmdbatch->submit_ticks;
drawctxt->ticks_index = (drawctxt->ticks_index + 1) %
SUBMIT_RETIRE_TICKS_SIZE;
kgsl_cmdbatch_destroy(cmdbatch);
}
static int adreno_dispatch_retire_cmdqueue(struct adreno_device *adreno_dev,
struct adreno_dispatcher_cmdqueue *cmdqueue)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
int count = 0;
while (!adreno_cmdqueue_is_empty(cmdqueue)) {
struct kgsl_cmdbatch *cmdbatch =
cmdqueue->cmd_q[cmdqueue->head];
if (!kgsl_check_timestamp(device, cmdbatch->context,
cmdbatch->timestamp))
break;
retire_cmdbatch(adreno_dev, cmdbatch);
dispatcher->inflight--;
cmdqueue->inflight--;
cmdqueue->cmd_q[cmdqueue->head] = NULL;
cmdqueue->head = CMDQUEUE_NEXT(cmdqueue->head,
ADRENO_DISPATCH_CMDQUEUE_SIZE);
count++;
}
return count;
}
static void _adreno_dispatch_check_timeout(struct adreno_device *adreno_dev,
struct adreno_dispatcher_cmdqueue *cmdqueue)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct kgsl_cmdbatch *cmdbatch = cmdqueue->cmd_q[cmdqueue->head];
/* Don't timeout if the timer hasn't expired yet (duh) */
if (time_is_after_jiffies(cmdqueue->expires))
return;
/* Don't timeout if the IB timeout is disabled globally */
if (!adreno_long_ib_detect(adreno_dev))
return;
/* Don't time out if the context has disabled it */
if (cmdbatch->context->flags & KGSL_CONTEXT_NO_FAULT_TOLERANCE)
return;
pr_context(device, cmdbatch->context, "gpu timeout ctx %d ts %d\n",
cmdbatch->context->id, cmdbatch->timestamp);
adreno_set_gpu_fault(adreno_dev, ADRENO_TIMEOUT_FAULT);
}
static int adreno_dispatch_process_cmdqueue(struct adreno_device *adreno_dev,
struct adreno_dispatcher_cmdqueue *cmdqueue)
{
int count = adreno_dispatch_retire_cmdqueue(adreno_dev, cmdqueue);
/* Nothing to do if there are no pending commands */
if (adreno_cmdqueue_is_empty(cmdqueue))
return count;
/* Don't update the cmdqueue timeout if we are about to preempt out */
if (!adreno_in_preempt_state(adreno_dev, ADRENO_PREEMPT_NONE))
return count;
/* Don't update the cmdqueue timeout if it isn't active */
if (!cmdqueue_is_current(cmdqueue))
return count;
/*
* If the current ringbuffer retired any commands then universally
* reset the timeout
*/
if (count) {
cmdqueue->expires = jiffies +
msecs_to_jiffies(adreno_cmdbatch_timeout);
return count;
}
/*
* If we get here then 1) the ringbuffer is current and 2) we haven't
* retired anything. Check to see if the timeout if valid for the
* current cmdbatch and fault if it has expired
*/
_adreno_dispatch_check_timeout(adreno_dev, cmdqueue);
return 0;
}
/* Update the dispatcher timers */
static void _dispatcher_update_timers(struct adreno_device *adreno_dev)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
/* Kick the idle timer */
mutex_lock(&device->mutex);
kgsl_pwrscale_update(device);
mod_timer(&device->idle_timer,
jiffies + device->pwrctrl.interval_timeout);
mutex_unlock(&device->mutex);
/* Check to see if we need to update the command timer */
if (adreno_in_preempt_state(adreno_dev, ADRENO_PREEMPT_NONE)) {
struct adreno_dispatcher_cmdqueue *cmdqueue =
CMDQUEUE(adreno_dev->cur_rb);
if (!adreno_cmdqueue_is_empty(cmdqueue))
mod_timer(&dispatcher->timer, cmdqueue->expires);
}
}
/* Take down the dispatcher and release any power states */
static void _dispatcher_power_down(struct adreno_device *adreno_dev)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
mutex_lock(&device->mutex);
if (test_and_clear_bit(ADRENO_DISPATCHER_ACTIVE, &dispatcher->priv))
complete_all(&dispatcher->idle_gate);
del_timer_sync(&dispatcher->fault_timer);
if (test_bit(ADRENO_DISPATCHER_POWER, &dispatcher->priv)) {
kgsl_active_count_put(device);
clear_bit(ADRENO_DISPATCHER_POWER, &dispatcher->priv);
}
mutex_unlock(&device->mutex);
}
static void adreno_dispatcher_work(struct kthread_work *work)
{
struct adreno_dispatcher *dispatcher =
container_of(work, struct adreno_dispatcher, work);
struct adreno_device *adreno_dev =
container_of(dispatcher, struct adreno_device, dispatcher);
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_gpudev *gpudev = ADRENO_GPU_DEVICE(adreno_dev);
int count = 0;
unsigned int i = 0;
mutex_lock(&dispatcher->mutex);
/*
* As long as there are inflight commands, process retired comamnds from
* all cmdqueues
*/
for (i = 0; i < adreno_dev->num_ringbuffers; i++) {
struct adreno_dispatcher_cmdqueue *cmdqueue =
CMDQUEUE(&adreno_dev->ringbuffers[i]);
count += adreno_dispatch_process_cmdqueue(adreno_dev,
cmdqueue);
if (dispatcher->inflight == 0)
break;
}
kgsl_process_event_groups(device);
/*
* dispatcher_do_fault() returns 0 if no faults occurred. If that is the
* case, then clean up preemption and try to schedule more work
*/
if (dispatcher_do_fault(adreno_dev) == 0) {
/* Clean up after preemption */
if (gpudev->preemption_schedule)
gpudev->preemption_schedule(adreno_dev);
/* Run the scheduler for to dispatch new commands */
_adreno_dispatcher_issuecmds(adreno_dev);
}
/*
* If there are commands pending, update the timers, otherwise release
* the power state to prepare for power down
*/
if (dispatcher->inflight > 0)
_dispatcher_update_timers(adreno_dev);
else
_dispatcher_power_down(adreno_dev);
mutex_unlock(&dispatcher->mutex);
}
void adreno_dispatcher_schedule(struct kgsl_device *device)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
queue_kthread_work(&kgsl_driver.worker, &dispatcher->work);
}
/**
* adreno_dispatcher_queue_context() - schedule a drawctxt in the dispatcher
* device: pointer to the KGSL device
* drawctxt: pointer to the drawctxt to schedule
*
* Put a draw context on the dispatcher pending queue and schedule the
* dispatcher. This is used to reschedule changes that might have been blocked
* for sync points or other concerns
*/
void adreno_dispatcher_queue_context(struct kgsl_device *device,
struct adreno_context *drawctxt)
{
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
dispatcher_queue_context(adreno_dev, drawctxt);
adreno_dispatcher_schedule(device);
}
/*
* This is called on a regular basis while command batches are inflight. Fault
* detection registers are read and compared to the existing values - if they
* changed then the GPU is still running. If they are the same between
* subsequent calls then the GPU may have faulted
*/
static void adreno_dispatcher_fault_timer(unsigned long data)
{
struct adreno_device *adreno_dev = (struct adreno_device *) data;
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
/* Leave if the user decided to turn off fast hang detection */
if (!adreno_soft_fault_detect(adreno_dev))
return;
if (adreno_gpu_fault(adreno_dev)) {
adreno_dispatcher_schedule(KGSL_DEVICE(adreno_dev));
return;
}
/*
* Read the fault registers - if it returns 0 then they haven't changed
* so mark the dispatcher as faulted and schedule the work loop.
*/
if (!fault_detect_read_compare(adreno_dev)) {
adreno_set_gpu_fault(adreno_dev, ADRENO_SOFT_FAULT);
adreno_dispatcher_schedule(KGSL_DEVICE(adreno_dev));
} else {
mod_timer(&dispatcher->fault_timer,
jiffies + msecs_to_jiffies(_fault_timer_interval));
}
}
/*
* This is called when the timer expires - it either means the GPU is hung or
* the IB is taking too long to execute
*/
static void adreno_dispatcher_timer(unsigned long data)
{
struct adreno_device *adreno_dev = (struct adreno_device *) data;
adreno_dispatcher_schedule(KGSL_DEVICE(adreno_dev));
}
/**
* adreno_dispatcher_start() - activate the dispatcher
* @adreno_dev: pointer to the adreno device structure
*
*/
void adreno_dispatcher_start(struct kgsl_device *device)
{
complete_all(&device->cmdbatch_gate);
/* Schedule the work loop to get things going */
adreno_dispatcher_schedule(device);
}
/**
* adreno_dispatcher_stop() - stop the dispatcher
* @adreno_dev: pointer to the adreno device structure
*
* Stop the dispatcher and close all the timers
*/
void adreno_dispatcher_stop(struct adreno_device *adreno_dev)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
del_timer_sync(&dispatcher->timer);
del_timer_sync(&dispatcher->fault_timer);
}
/**
* adreno_dispatcher_close() - close the dispatcher
* @adreno_dev: pointer to the adreno device structure
*
* Close the dispatcher and free all the oustanding commands and memory
*/
void adreno_dispatcher_close(struct adreno_device *adreno_dev)
{
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
int i;
struct adreno_ringbuffer *rb;
mutex_lock(&dispatcher->mutex);
del_timer_sync(&dispatcher->timer);
del_timer_sync(&dispatcher->fault_timer);
FOR_EACH_RINGBUFFER(adreno_dev, rb, i) {
struct adreno_dispatcher_cmdqueue *dispatch_q =
&(rb->dispatch_q);
while (!adreno_cmdqueue_is_empty(dispatch_q)) {
kgsl_cmdbatch_destroy(
dispatch_q->cmd_q[dispatch_q->head]);
dispatch_q->head = (dispatch_q->head + 1)
% ADRENO_DISPATCH_CMDQUEUE_SIZE;
}
}
mutex_unlock(&dispatcher->mutex);
kobject_put(&dispatcher->kobj);
}
struct dispatcher_attribute {
struct attribute attr;
ssize_t (*show)(struct adreno_dispatcher *,
struct dispatcher_attribute *, char *);
ssize_t (*store)(struct adreno_dispatcher *,
struct dispatcher_attribute *, const char *buf,
size_t count);
unsigned int max;
unsigned int *value;
};
#define DISPATCHER_UINT_ATTR(_name, _mode, _max, _value) \
struct dispatcher_attribute dispatcher_attr_##_name = { \
.attr = { .name = __stringify(_name), .mode = _mode }, \
.show = _show_uint, \
.store = _store_uint, \
.max = _max, \
.value = &(_value), \
}
#define to_dispatcher_attr(_a) \
container_of((_a), struct dispatcher_attribute, attr)
#define to_dispatcher(k) container_of(k, struct adreno_dispatcher, kobj)
static ssize_t _store_uint(struct adreno_dispatcher *dispatcher,
struct dispatcher_attribute *attr,
const char *buf, size_t size)
{
unsigned int val = 0;
int ret;
ret = kgsl_sysfs_store(buf, &val);
if (ret)
return ret;
if (!val || (attr->max && (val > attr->max)))
return -EINVAL;
*((unsigned int *) attr->value) = val;
return size;
}
static ssize_t _show_uint(struct adreno_dispatcher *dispatcher,
struct dispatcher_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n",
*((unsigned int *) attr->value));
}
static DISPATCHER_UINT_ATTR(inflight, 0644, ADRENO_DISPATCH_CMDQUEUE_SIZE,
_dispatcher_q_inflight_hi);
static DISPATCHER_UINT_ATTR(inflight_low_latency, 0644,
ADRENO_DISPATCH_CMDQUEUE_SIZE, _dispatcher_q_inflight_lo);
/*
* Our code that "puts back" a command from the context is much cleaner
* if we are sure that there will always be enough room in the
* ringbuffer so restrict the maximum size of the context queue to
* ADRENO_CONTEXT_CMDQUEUE_SIZE - 1
*/
static DISPATCHER_UINT_ATTR(context_cmdqueue_size, 0644,
ADRENO_CONTEXT_CMDQUEUE_SIZE - 1, _context_cmdqueue_size);
static DISPATCHER_UINT_ATTR(context_burst_count, 0644, 0,
_context_cmdbatch_burst);
static DISPATCHER_UINT_ATTR(cmdbatch_timeout, 0644, 0,
adreno_cmdbatch_timeout);
static DISPATCHER_UINT_ATTR(context_queue_wait, 0644, 0, _context_queue_wait);
static DISPATCHER_UINT_ATTR(fault_detect_interval, 0644, 0,
_fault_timer_interval);
static DISPATCHER_UINT_ATTR(fault_throttle_time, 0644, 0,
_fault_throttle_time);
static DISPATCHER_UINT_ATTR(fault_throttle_burst, 0644, 0,
_fault_throttle_burst);
static DISPATCHER_UINT_ATTR(disp_preempt_fair_sched, 0644, 0,
adreno_disp_preempt_fair_sched);
static DISPATCHER_UINT_ATTR(dispatch_time_slice, 0644, 0,
adreno_dispatch_time_slice);
static DISPATCHER_UINT_ATTR(dispatch_starvation_time, 0644, 0,
adreno_dispatch_starvation_time);
static struct attribute *dispatcher_attrs[] = {
&dispatcher_attr_inflight.attr,
&dispatcher_attr_inflight_low_latency.attr,
&dispatcher_attr_context_cmdqueue_size.attr,
&dispatcher_attr_context_burst_count.attr,
&dispatcher_attr_cmdbatch_timeout.attr,
&dispatcher_attr_context_queue_wait.attr,
&dispatcher_attr_fault_detect_interval.attr,
&dispatcher_attr_fault_throttle_time.attr,
&dispatcher_attr_fault_throttle_burst.attr,
&dispatcher_attr_disp_preempt_fair_sched.attr,
&dispatcher_attr_dispatch_time_slice.attr,
&dispatcher_attr_dispatch_starvation_time.attr,
NULL,
};
static ssize_t dispatcher_sysfs_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
struct adreno_dispatcher *dispatcher = to_dispatcher(kobj);
struct dispatcher_attribute *pattr = to_dispatcher_attr(attr);
ssize_t ret = -EIO;
if (pattr->show)
ret = pattr->show(dispatcher, pattr, buf);
return ret;
}
static ssize_t dispatcher_sysfs_store(struct kobject *kobj,
struct attribute *attr,
const char *buf, size_t count)
{
struct adreno_dispatcher *dispatcher = to_dispatcher(kobj);
struct dispatcher_attribute *pattr = to_dispatcher_attr(attr);
ssize_t ret = -EIO;
if (pattr->store)
ret = pattr->store(dispatcher, pattr, buf, count);
return ret;
}
static const struct sysfs_ops dispatcher_sysfs_ops = {
.show = dispatcher_sysfs_show,
.store = dispatcher_sysfs_store
};
static struct kobj_type ktype_dispatcher = {
.sysfs_ops = &dispatcher_sysfs_ops,
.default_attrs = dispatcher_attrs,
};
/**
* adreno_dispatcher_init() - Initialize the dispatcher
* @adreno_dev: pointer to the adreno device structure
*
* Initialize the dispatcher
*/
int adreno_dispatcher_init(struct adreno_device *adreno_dev)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
int ret;
memset(dispatcher, 0, sizeof(*dispatcher));
mutex_init(&dispatcher->mutex);
setup_timer(&dispatcher->timer, adreno_dispatcher_timer,
(unsigned long) adreno_dev);
setup_timer(&dispatcher->fault_timer, adreno_dispatcher_fault_timer,
(unsigned long) adreno_dev);
init_kthread_work(&dispatcher->work, adreno_dispatcher_work);
init_completion(&dispatcher->idle_gate);
complete_all(&dispatcher->idle_gate);
plist_head_init(&dispatcher->pending);
spin_lock_init(&dispatcher->plist_lock);
ret = kobject_init_and_add(&dispatcher->kobj, &ktype_dispatcher,
&device->dev->kobj, "dispatch");
return ret;
}
/*
* adreno_dispatcher_idle() - Wait for dispatcher to idle
* @adreno_dev: Adreno device whose dispatcher needs to idle
*
* Signal dispatcher to stop sending more commands and complete
* the commands that have already been submitted. This function
* should not be called when dispatcher mutex is held.
*/
int adreno_dispatcher_idle(struct adreno_device *adreno_dev)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_dispatcher *dispatcher = &adreno_dev->dispatcher;
int ret;
BUG_ON(!mutex_is_locked(&device->mutex));
if (!test_bit(ADRENO_DEVICE_STARTED, &adreno_dev->priv))
return 0;
/*
* Ensure that this function is not called when dispatcher
* mutex is held and device is started
*/
if (mutex_is_locked(&dispatcher->mutex) &&
dispatcher->mutex.owner == current)
BUG_ON(1);
adreno_get_gpu_halt(adreno_dev);
mutex_unlock(&device->mutex);
ret = wait_for_completion_timeout(&dispatcher->idle_gate,
msecs_to_jiffies(ADRENO_IDLE_TIMEOUT));
if (ret == 0) {
ret = -ETIMEDOUT;
WARN(1, "Dispatcher halt timeout ");
} else if (ret < 0) {
KGSL_DRV_ERR(device, "Dispatcher halt failed %d\n", ret);
} else {
ret = 0;
}
mutex_lock(&device->mutex);
adreno_put_gpu_halt(adreno_dev);
/*
* requeue dispatcher work to resubmit pending commands
* that may have been blocked due to this idling request
*/
adreno_dispatcher_schedule(device);
return ret;
}