blob: 0882447e6dd8d814b29e532a381716af5cd0b201 [file] [log] [blame]
/* Copyright (c) 2002,2007-2017, 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/slab.h>
#include <linux/msm_kgsl.h>
#include <linux/sched.h>
#include <linux/debugfs.h>
#include "kgsl.h"
#include "kgsl_sharedmem.h"
#include "adreno.h"
#include "adreno_trace.h"
static void wait_callback(struct kgsl_device *device,
struct kgsl_event_group *group, void *priv, int result)
{
struct adreno_context *drawctxt = priv;
wake_up_all(&drawctxt->waiting);
}
static int _check_context_timestamp(struct kgsl_device *device,
struct kgsl_context *context, unsigned int timestamp)
{
/* Bail if the drawctxt has been invalidated or destroyed */
if (kgsl_context_detached(context) || kgsl_context_invalid(context))
return 1;
return kgsl_check_timestamp(device, context, timestamp);
}
/**
* adreno_drawctxt_dump() - dump information about a draw context
* @device: KGSL device that owns the context
* @context: KGSL context to dump information about
*
* Dump specific information about the context to the kernel log. Used for
* fence timeout callbacks
*/
void adreno_drawctxt_dump(struct kgsl_device *device,
struct kgsl_context *context)
{
unsigned int queue, start, retire;
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int index, pos;
char buf[120];
kgsl_readtimestamp(device, context, KGSL_TIMESTAMP_QUEUED, &queue);
kgsl_readtimestamp(device, context, KGSL_TIMESTAMP_CONSUMED, &start);
kgsl_readtimestamp(device, context, KGSL_TIMESTAMP_RETIRED, &retire);
/*
* We may have kgsl sync obj timer running, which also uses same
* lock, take a lock with software interrupt disabled (bh)
* to avoid spin lock recursion.
*
* Use Spin trylock because dispatcher can acquire drawctxt->lock
* if context is pending and the fence it is waiting on just got
* signalled. Dispatcher acquires drawctxt->lock and tries to
* delete the sync obj timer using del_timer_sync().
* del_timer_sync() waits till timer and its pending handlers
* are deleted. But if the timer expires at the same time,
* timer handler could be waiting on drawctxt->lock leading to a
* deadlock. To prevent this use spin_trylock_bh.
*/
if (!spin_trylock_bh(&drawctxt->lock)) {
dev_err(device->dev, " context[%d]: could not get lock\n",
context->id);
return;
}
dev_err(device->dev,
" context[%d]: queue=%d, submit=%d, start=%d, retire=%d\n",
context->id, queue, drawctxt->submitted_timestamp,
start, retire);
if (drawctxt->drawqueue_head != drawctxt->drawqueue_tail) {
struct kgsl_drawobj *drawobj =
drawctxt->drawqueue[drawctxt->drawqueue_head];
if (test_bit(ADRENO_CONTEXT_FENCE_LOG, &context->priv)) {
dev_err(device->dev,
" possible deadlock. Context %d might be blocked for itself\n",
context->id);
goto stats;
}
if (!kref_get_unless_zero(&drawobj->refcount))
goto stats;
if (drawobj->type == SYNCOBJ_TYPE) {
struct kgsl_drawobj_sync *syncobj = SYNCOBJ(drawobj);
if (kgsl_drawobj_events_pending(syncobj)) {
dev_err(device->dev,
" context[%d] (ts=%d) Active sync points:\n",
context->id, drawobj->timestamp);
kgsl_dump_syncpoints(device, syncobj);
}
}
kgsl_drawobj_put(drawobj);
}
stats:
memset(buf, 0, sizeof(buf));
pos = 0;
for (index = 0; index < SUBMIT_RETIRE_TICKS_SIZE; index++) {
uint64_t msecs;
unsigned int usecs;
if (!drawctxt->submit_retire_ticks[index])
continue;
msecs = drawctxt->submit_retire_ticks[index] * 10;
usecs = do_div(msecs, 192);
usecs = do_div(msecs, 1000);
pos += snprintf(buf + pos, sizeof(buf) - pos, "%d.%0d ",
(unsigned int)msecs, usecs);
}
dev_err(device->dev, " context[%d]: submit times: %s\n",
context->id, buf);
spin_unlock_bh(&drawctxt->lock);
}
/**
* adreno_drawctxt_wait() - sleep until a timestamp expires
* @adreno_dev: pointer to the adreno_device struct
* @drawctxt: Pointer to the draw context to sleep for
* @timetamp: Timestamp to wait on
* @timeout: Number of jiffies to wait (0 for infinite)
*
* Register an event to wait for a timestamp on a context and sleep until it
* has past. Returns < 0 on error, -ETIMEDOUT if the timeout expires or 0
* on success
*/
int adreno_drawctxt_wait(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret;
long ret_temp;
if (kgsl_context_detached(context))
return -ENOENT;
if (kgsl_context_invalid(context))
return -EDEADLK;
trace_adreno_drawctxt_wait_start(-1, context->id, timestamp);
ret = kgsl_add_event(device, &context->events, timestamp,
wait_callback, (void *) drawctxt);
if (ret)
goto done;
/*
* If timeout is 0, wait forever. msecs_to_jiffies will force
* values larger than INT_MAX to an infinite timeout.
*/
if (timeout == 0)
timeout = UINT_MAX;
ret_temp = wait_event_interruptible_timeout(drawctxt->waiting,
_check_context_timestamp(device, context, timestamp),
msecs_to_jiffies(timeout));
if (ret_temp == 0) {
ret = -ETIMEDOUT;
goto done;
} else if (ret_temp < 0) {
ret = (int) ret_temp;
goto done;
}
ret = 0;
/* -EDEADLK if the context was invalidated while we were waiting */
if (kgsl_context_invalid(context))
ret = -EDEADLK;
/* Return -EINVAL if the context was detached while we were waiting */
if (kgsl_context_detached(context))
ret = -ENOENT;
done:
trace_adreno_drawctxt_wait_done(-1, context->id, timestamp, ret);
return ret;
}
/**
* adreno_drawctxt_wait_rb() - Wait for the last RB timestamp at which this
* context submitted a command to the corresponding RB
* @adreno_dev: The device on which the timestamp is active
* @context: The context which subbmitted command to RB
* @timestamp: The RB timestamp of last command submitted to RB by context
* @timeout: Timeout value for the wait
* Caller must hold the device mutex
*/
static int adreno_drawctxt_wait_rb(struct adreno_device *adreno_dev,
struct kgsl_context *context,
uint32_t timestamp, unsigned int timeout)
{
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
int ret = 0;
/*
* If the context is invalid (OR) not submitted commands to GPU
* then return immediately - we may end up waiting for a timestamp
* that will never come
*/
if (kgsl_context_invalid(context) ||
!test_bit(KGSL_CONTEXT_PRIV_SUBMITTED, &context->priv))
goto done;
trace_adreno_drawctxt_wait_start(drawctxt->rb->id, context->id,
timestamp);
ret = adreno_ringbuffer_waittimestamp(drawctxt->rb, timestamp, timeout);
done:
trace_adreno_drawctxt_wait_done(drawctxt->rb->id, context->id,
timestamp, ret);
return ret;
}
static int drawctxt_detach_drawobjs(struct adreno_context *drawctxt,
struct kgsl_drawobj **list)
{
int count = 0;
while (drawctxt->drawqueue_head != drawctxt->drawqueue_tail) {
struct kgsl_drawobj *drawobj =
drawctxt->drawqueue[drawctxt->drawqueue_head];
drawctxt->drawqueue_head = (drawctxt->drawqueue_head + 1) %
ADRENO_CONTEXT_DRAWQUEUE_SIZE;
list[count++] = drawobj;
}
return count;
}
/**
* adreno_drawctxt_invalidate() - Invalidate an adreno draw context
* @device: Pointer to the KGSL device structure for the GPU
* @context: Pointer to the KGSL context structure
*
* Invalidate the context and remove all queued commands and cancel any pending
* waiters
*/
void adreno_drawctxt_invalidate(struct kgsl_device *device,
struct kgsl_context *context)
{
struct adreno_context *drawctxt = ADRENO_CONTEXT(context);
struct kgsl_drawobj *list[ADRENO_CONTEXT_DRAWQUEUE_SIZE];
int i, count;
trace_adreno_drawctxt_invalidate(drawctxt);
spin_lock(&drawctxt->lock);
set_bit(KGSL_CONTEXT_PRIV_INVALID, &context->priv);
/*
* set the timestamp to the last value since the context is invalidated
* and we want the pending events for this context to go away
*/
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, soptimestamp),
drawctxt->timestamp);
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, eoptimestamp),
drawctxt->timestamp);
/* Get rid of commands still waiting in the queue */
count = drawctxt_detach_drawobjs(drawctxt, list);
spin_unlock(&drawctxt->lock);
for (i = 0; i < count; i++) {
kgsl_cancel_events_timestamp(device, &context->events,
list[i]->timestamp);
kgsl_drawobj_destroy(list[i]);
}
/* Make sure all pending events are processed or cancelled */
kgsl_flush_event_group(device, &context->events);
/* Give the bad news to everybody waiting around */
wake_up_all(&drawctxt->waiting);
wake_up_all(&drawctxt->wq);
}
/*
* Set the priority of the context based on the flags passed into context
* create. If the priority is not set in the flags, then the kernel can
* assign any priority it desires for the context.
*/
#define KGSL_CONTEXT_PRIORITY_MED 0x8
static inline void _set_context_priority(struct adreno_context *drawctxt)
{
/* If the priority is not set by user, set it for them */
if ((drawctxt->base.flags & KGSL_CONTEXT_PRIORITY_MASK) ==
KGSL_CONTEXT_PRIORITY_UNDEF)
drawctxt->base.flags |= (KGSL_CONTEXT_PRIORITY_MED <<
KGSL_CONTEXT_PRIORITY_SHIFT);
/* Store the context priority */
drawctxt->base.priority =
(drawctxt->base.flags & KGSL_CONTEXT_PRIORITY_MASK) >>
KGSL_CONTEXT_PRIORITY_SHIFT;
}
/**
* adreno_drawctxt_create - create a new adreno draw context
* @dev_priv: the owner of the context
* @flags: flags for the context (passed from user space)
*
* Create and return a new draw context for the 3D core.
*/
struct kgsl_context *
adreno_drawctxt_create(struct kgsl_device_private *dev_priv,
uint32_t *flags)
{
struct adreno_context *drawctxt;
struct kgsl_device *device = dev_priv->device;
struct adreno_device *adreno_dev = ADRENO_DEVICE(device);
struct adreno_gpudev *gpudev = ADRENO_GPU_DEVICE(adreno_dev);
int ret;
unsigned int local;
local = *flags & (KGSL_CONTEXT_PREAMBLE |
KGSL_CONTEXT_NO_GMEM_ALLOC |
KGSL_CONTEXT_PER_CONTEXT_TS |
KGSL_CONTEXT_USER_GENERATED_TS |
KGSL_CONTEXT_NO_FAULT_TOLERANCE |
KGSL_CONTEXT_INVALIDATE_ON_FAULT |
KGSL_CONTEXT_CTX_SWITCH |
KGSL_CONTEXT_PRIORITY_MASK |
KGSL_CONTEXT_TYPE_MASK |
KGSL_CONTEXT_PWR_CONSTRAINT |
KGSL_CONTEXT_IFH_NOP |
KGSL_CONTEXT_SECURE |
KGSL_CONTEXT_PREEMPT_STYLE_MASK |
KGSL_CONTEXT_NO_SNAPSHOT |
KGSL_CONTEXT_SPARSE);
/* Check for errors before trying to initialize */
/* If preemption is not supported, ignore preemption request */
if (!test_bit(ADRENO_DEVICE_PREEMPTION, &adreno_dev->priv))
local &= ~KGSL_CONTEXT_PREEMPT_STYLE_MASK;
/* We no longer support legacy context switching */
if ((local & KGSL_CONTEXT_PREAMBLE) == 0 ||
(local & KGSL_CONTEXT_NO_GMEM_ALLOC) == 0) {
KGSL_DEV_ERR_ONCE(device,
"legacy context switch not supported\n");
return ERR_PTR(-EINVAL);
}
/* Make sure that our target can support secure contexts if requested */
if (!kgsl_mmu_is_secured(&dev_priv->device->mmu) &&
(local & KGSL_CONTEXT_SECURE)) {
KGSL_DEV_ERR_ONCE(device, "Secure context not supported\n");
return ERR_PTR(-EOPNOTSUPP);
}
drawctxt = kzalloc(sizeof(struct adreno_context), GFP_KERNEL);
if (drawctxt == NULL)
return ERR_PTR(-ENOMEM);
drawctxt->timestamp = 0;
drawctxt->base.flags = local;
/* Always enable per-context timestamps */
drawctxt->base.flags |= KGSL_CONTEXT_PER_CONTEXT_TS;
drawctxt->type = (drawctxt->base.flags & KGSL_CONTEXT_TYPE_MASK)
>> KGSL_CONTEXT_TYPE_SHIFT;
spin_lock_init(&drawctxt->lock);
init_waitqueue_head(&drawctxt->wq);
init_waitqueue_head(&drawctxt->waiting);
/* Set the context priority */
_set_context_priority(drawctxt);
/* set the context ringbuffer */
drawctxt->rb = adreno_ctx_get_rb(adreno_dev, drawctxt);
/*
* Set up the plist node for the dispatcher. Insert the node into the
* drawctxt pending list based on priority.
*/
plist_node_init(&drawctxt->pending, drawctxt->base.priority);
/*
* Now initialize the common part of the context. This allocates the
* context id, and then possibly another thread could look it up.
* So we want all of our initializtion that doesn't require the context
* id to be done before this call.
*/
ret = kgsl_context_init(dev_priv, &drawctxt->base);
if (ret != 0) {
kfree(drawctxt);
return ERR_PTR(ret);
}
if (gpudev->preemption_context_init) {
ret = gpudev->preemption_context_init(&drawctxt->base);
if (ret != 0) {
kgsl_context_detach(&drawctxt->base);
kgsl_context_put(&drawctxt->base);
kfree(drawctxt);
return ERR_PTR(ret);
}
}
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(drawctxt->base.id, soptimestamp),
0);
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(drawctxt->base.id, eoptimestamp),
0);
adreno_context_debugfs_init(ADRENO_DEVICE(device), drawctxt);
INIT_LIST_HEAD(&drawctxt->active_node);
/* copy back whatever flags we dediced were valid */
*flags = drawctxt->base.flags;
return &drawctxt->base;
}
/**
* adreno_drawctxt_sched() - Schedule a previously blocked context
* @device: pointer to a KGSL device
* @drawctxt: drawctxt to rechedule
*
* This function is called by the core when it knows that a previously blocked
* context has been unblocked. The default adreno response is to reschedule the
* context on the dispatcher
*/
void adreno_drawctxt_sched(struct kgsl_device *device,
struct kgsl_context *context)
{
adreno_dispatcher_queue_context(device, ADRENO_CONTEXT(context));
}
/**
* adreno_drawctxt_detach(): detach a context from the GPU
* @context: Generic KGSL context container for the context
*
*/
void adreno_drawctxt_detach(struct kgsl_context *context)
{
struct kgsl_device *device;
struct adreno_device *adreno_dev;
struct adreno_context *drawctxt;
struct adreno_ringbuffer *rb;
int ret, count, i;
struct kgsl_drawobj *list[ADRENO_CONTEXT_DRAWQUEUE_SIZE];
if (context == NULL)
return;
device = context->device;
adreno_dev = ADRENO_DEVICE(device);
drawctxt = ADRENO_CONTEXT(context);
rb = drawctxt->rb;
spin_lock(&adreno_dev->active_list_lock);
list_del_init(&drawctxt->active_node);
spin_unlock(&adreno_dev->active_list_lock);
spin_lock(&drawctxt->lock);
count = drawctxt_detach_drawobjs(drawctxt, list);
spin_unlock(&drawctxt->lock);
for (i = 0; i < count; i++) {
/*
* If the context is deteached while we are waiting for
* the next command in GFT SKIP CMD, print the context
* detached status here.
*/
adreno_fault_skipcmd_detached(adreno_dev, drawctxt, list[i]);
kgsl_drawobj_destroy(list[i]);
}
/*
* internal_timestamp is set in adreno_ringbuffer_addcmds,
* which holds the device mutex.
*/
mutex_lock(&device->mutex);
/*
* Wait for the last global timestamp to pass before continuing.
* The maxumum wait time is 30s, some large IB's can take longer
* than 10s and if hang happens then the time for the context's
* commands to retire will be greater than 10s. 30s should be sufficient
* time to wait for the commands even if a hang happens.
*/
ret = adreno_drawctxt_wait_rb(adreno_dev, context,
drawctxt->internal_timestamp, 30 * 1000);
/*
* If the wait for global fails due to timeout then nothing after this
* point is likely to work very well - Get GPU snapshot and BUG_ON()
* so we can take advantage of the debug tools to figure out what the
* h - e - double hockey sticks happened. If EAGAIN error is returned
* then recovery will kick in and there will be no more commands in the
* RB pipe from this context which is waht we are waiting for, so ignore
* -EAGAIN error
*/
if (ret && ret != -EAGAIN) {
KGSL_DRV_ERR(device, "Wait for global ts=%d type=%d error=%d\n",
drawctxt->internal_timestamp,
drawctxt->type, ret);
device->force_panic = 1;
kgsl_device_snapshot(device, context);
}
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, soptimestamp),
drawctxt->timestamp);
kgsl_sharedmem_writel(device, &device->memstore,
KGSL_MEMSTORE_OFFSET(context->id, eoptimestamp),
drawctxt->timestamp);
adreno_profile_process_results(adreno_dev);
mutex_unlock(&device->mutex);
debugfs_remove_recursive(drawctxt->debug_root);
/* wake threads waiting to submit commands from this context */
wake_up_all(&drawctxt->waiting);
wake_up_all(&drawctxt->wq);
}
void adreno_drawctxt_destroy(struct kgsl_context *context)
{
struct adreno_context *drawctxt;
struct adreno_device *adreno_dev;
struct adreno_gpudev *gpudev;
if (context == NULL)
return;
adreno_dev = ADRENO_DEVICE(context->device);
gpudev = ADRENO_GPU_DEVICE(adreno_dev);
if (gpudev->preemption_context_destroy)
gpudev->preemption_context_destroy(context);
drawctxt = ADRENO_CONTEXT(context);
kfree(drawctxt);
}
static void _drawctxt_switch_wait_callback(struct kgsl_device *device,
struct kgsl_event_group *group,
void *priv, int result)
{
struct adreno_context *drawctxt = (struct adreno_context *) priv;
kgsl_context_put(&drawctxt->base);
}
/**
* adreno_drawctxt_switch - switch the current draw context in a given RB
* @adreno_dev - The 3D device that owns the context
* @rb: The ringubffer pointer on which the current context is being changed
* @drawctxt - the 3D context to switch to
* @flags: Control flags for the switch
*
* Switch the current draw context in given RB
*/
int adreno_drawctxt_switch(struct adreno_device *adreno_dev,
struct adreno_ringbuffer *rb,
struct adreno_context *drawctxt,
unsigned int flags)
{
struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
struct kgsl_pagetable *new_pt;
int ret = 0;
/* We always expect a valid rb */
if (!rb)
return -EINVAL;
/* already current? */
if (rb->drawctxt_active == drawctxt)
return ret;
/*
* Submitting pt switch commands from a detached context can
* lead to a race condition where the pt is destroyed before
* the pt switch commands get executed by the GPU, leading to
* pagefaults.
*/
if (drawctxt != NULL && kgsl_context_detached(&drawctxt->base))
return -ENOENT;
trace_adreno_drawctxt_switch(rb, drawctxt);
/* Get a refcount to the new instance */
if (drawctxt) {
if (!_kgsl_context_get(&drawctxt->base))
return -ENOENT;
new_pt = drawctxt->base.proc_priv->pagetable;
} else {
/* No context - set the default pagetable and thats it. */
new_pt = device->mmu.defaultpagetable;
}
ret = adreno_ringbuffer_set_pt_ctx(rb, new_pt, drawctxt, flags);
if (ret)
return ret;
if (rb->drawctxt_active) {
/* Wait for the timestamp to expire */
if (kgsl_add_event(device, &rb->events, rb->timestamp,
_drawctxt_switch_wait_callback,
rb->drawctxt_active)) {
kgsl_context_put(&rb->drawctxt_active->base);
}
}
rb->drawctxt_active = drawctxt;
return 0;
}