| /* 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); |
| int ret; |
| unsigned long 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); |
| } |
| |
| 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); |
| |
| /* 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; |
| |
| if (context == NULL) |
| return; |
| |
| drawctxt = ADRENO_CONTEXT(context); |
| debugfs_remove_recursive(drawctxt->debug_root); |
| 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; |
| } |