| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2013 Red Hat |
| * Author: Rob Clark <robdclark@gmail.com> |
| */ |
| |
| #include "drm/drm_drv.h" |
| |
| #include "msm_gpu.h" |
| #include "msm_gem.h" |
| #include "msm_mmu.h" |
| #include "msm_fence.h" |
| #include "msm_gpu_trace.h" |
| #include "adreno/adreno_gpu.h" |
| |
| #include <generated/utsrelease.h> |
| #include <linux/string_helpers.h> |
| #include <linux/devcoredump.h> |
| #include <linux/reset.h> |
| #include <linux/sched/task.h> |
| |
| /* |
| * Power Management: |
| */ |
| |
| static int enable_pwrrail(struct msm_gpu *gpu) |
| { |
| struct drm_device *dev = gpu->dev; |
| int ret = 0; |
| |
| if (gpu->gpu_reg) { |
| ret = regulator_enable(gpu->gpu_reg); |
| if (ret) { |
| DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_reg': %d\n", ret); |
| return ret; |
| } |
| } |
| |
| if (gpu->gpu_cx) { |
| ret = regulator_enable(gpu->gpu_cx); |
| if (ret) { |
| DRM_DEV_ERROR(dev->dev, "failed to enable 'gpu_cx': %d\n", ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int disable_pwrrail(struct msm_gpu *gpu) |
| { |
| if (gpu->gpu_cx) |
| regulator_disable(gpu->gpu_cx); |
| if (gpu->gpu_reg) |
| regulator_disable(gpu->gpu_reg); |
| return 0; |
| } |
| |
| static int enable_clk(struct msm_gpu *gpu) |
| { |
| if (gpu->core_clk && gpu->fast_rate) |
| clk_set_rate(gpu->core_clk, gpu->fast_rate); |
| |
| /* Set the RBBM timer rate to 19.2Mhz */ |
| if (gpu->rbbmtimer_clk) |
| clk_set_rate(gpu->rbbmtimer_clk, 19200000); |
| |
| return clk_bulk_prepare_enable(gpu->nr_clocks, gpu->grp_clks); |
| } |
| |
| static int disable_clk(struct msm_gpu *gpu) |
| { |
| clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks); |
| |
| /* |
| * Set the clock to a deliberately low rate. On older targets the clock |
| * speed had to be non zero to avoid problems. On newer targets this |
| * will be rounded down to zero anyway so it all works out. |
| */ |
| if (gpu->core_clk) |
| clk_set_rate(gpu->core_clk, 27000000); |
| |
| if (gpu->rbbmtimer_clk) |
| clk_set_rate(gpu->rbbmtimer_clk, 0); |
| |
| return 0; |
| } |
| |
| static int enable_axi(struct msm_gpu *gpu) |
| { |
| return clk_prepare_enable(gpu->ebi1_clk); |
| } |
| |
| static int disable_axi(struct msm_gpu *gpu) |
| { |
| clk_disable_unprepare(gpu->ebi1_clk); |
| return 0; |
| } |
| |
| int msm_gpu_pm_resume(struct msm_gpu *gpu) |
| { |
| int ret; |
| |
| DBG("%s", gpu->name); |
| trace_msm_gpu_resume(0); |
| |
| ret = enable_pwrrail(gpu); |
| if (ret) |
| return ret; |
| |
| ret = enable_clk(gpu); |
| if (ret) |
| return ret; |
| |
| ret = enable_axi(gpu); |
| if (ret) |
| return ret; |
| |
| msm_devfreq_resume(gpu); |
| |
| gpu->needs_hw_init = true; |
| |
| return 0; |
| } |
| |
| int msm_gpu_pm_suspend(struct msm_gpu *gpu) |
| { |
| int ret; |
| |
| DBG("%s", gpu->name); |
| trace_msm_gpu_suspend(0); |
| |
| msm_devfreq_suspend(gpu); |
| |
| ret = disable_axi(gpu); |
| if (ret) |
| return ret; |
| |
| ret = disable_clk(gpu); |
| if (ret) |
| return ret; |
| |
| ret = disable_pwrrail(gpu); |
| if (ret) |
| return ret; |
| |
| gpu->suspend_count++; |
| |
| return 0; |
| } |
| |
| void msm_gpu_show_fdinfo(struct msm_gpu *gpu, struct msm_file_private *ctx, |
| struct drm_printer *p) |
| { |
| drm_printf(p, "drm-driver:\t%s\n", gpu->dev->driver->name); |
| drm_printf(p, "drm-client-id:\t%u\n", ctx->seqno); |
| drm_printf(p, "drm-engine-gpu:\t%llu ns\n", ctx->elapsed_ns); |
| drm_printf(p, "drm-cycles-gpu:\t%llu\n", ctx->cycles); |
| drm_printf(p, "drm-maxfreq-gpu:\t%u Hz\n", gpu->fast_rate); |
| } |
| |
| int msm_gpu_hw_init(struct msm_gpu *gpu) |
| { |
| int ret; |
| |
| WARN_ON(!mutex_is_locked(&gpu->lock)); |
| |
| if (!gpu->needs_hw_init) |
| return 0; |
| |
| disable_irq(gpu->irq); |
| ret = gpu->funcs->hw_init(gpu); |
| if (!ret) |
| gpu->needs_hw_init = false; |
| enable_irq(gpu->irq); |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_DEV_COREDUMP |
| static ssize_t msm_gpu_devcoredump_read(char *buffer, loff_t offset, |
| size_t count, void *data, size_t datalen) |
| { |
| struct msm_gpu *gpu = data; |
| struct drm_print_iterator iter; |
| struct drm_printer p; |
| struct msm_gpu_state *state; |
| |
| state = msm_gpu_crashstate_get(gpu); |
| if (!state) |
| return 0; |
| |
| iter.data = buffer; |
| iter.offset = 0; |
| iter.start = offset; |
| iter.remain = count; |
| |
| p = drm_coredump_printer(&iter); |
| |
| drm_printf(&p, "---\n"); |
| drm_printf(&p, "kernel: " UTS_RELEASE "\n"); |
| drm_printf(&p, "module: " KBUILD_MODNAME "\n"); |
| drm_printf(&p, "time: %lld.%09ld\n", |
| state->time.tv_sec, state->time.tv_nsec); |
| if (state->comm) |
| drm_printf(&p, "comm: %s\n", state->comm); |
| if (state->cmd) |
| drm_printf(&p, "cmdline: %s\n", state->cmd); |
| |
| gpu->funcs->show(gpu, state, &p); |
| |
| msm_gpu_crashstate_put(gpu); |
| |
| return count - iter.remain; |
| } |
| |
| static void msm_gpu_devcoredump_free(void *data) |
| { |
| struct msm_gpu *gpu = data; |
| |
| msm_gpu_crashstate_put(gpu); |
| } |
| |
| static void msm_gpu_crashstate_get_bo(struct msm_gpu_state *state, |
| struct msm_gem_object *obj, u64 iova, bool full) |
| { |
| struct msm_gpu_state_bo *state_bo = &state->bos[state->nr_bos]; |
| |
| /* Don't record write only objects */ |
| state_bo->size = obj->base.size; |
| state_bo->iova = iova; |
| |
| BUILD_BUG_ON(sizeof(state_bo->name) != sizeof(obj->name)); |
| |
| memcpy(state_bo->name, obj->name, sizeof(state_bo->name)); |
| |
| if (full) { |
| void *ptr; |
| |
| state_bo->data = kvmalloc(obj->base.size, GFP_KERNEL); |
| if (!state_bo->data) |
| goto out; |
| |
| msm_gem_lock(&obj->base); |
| ptr = msm_gem_get_vaddr_active(&obj->base); |
| msm_gem_unlock(&obj->base); |
| if (IS_ERR(ptr)) { |
| kvfree(state_bo->data); |
| state_bo->data = NULL; |
| goto out; |
| } |
| |
| memcpy(state_bo->data, ptr, obj->base.size); |
| msm_gem_put_vaddr(&obj->base); |
| } |
| out: |
| state->nr_bos++; |
| } |
| |
| static void msm_gpu_crashstate_capture(struct msm_gpu *gpu, |
| struct msm_gem_submit *submit, char *comm, char *cmd) |
| { |
| struct msm_gpu_state *state; |
| |
| /* Check if the target supports capturing crash state */ |
| if (!gpu->funcs->gpu_state_get) |
| return; |
| |
| /* Only save one crash state at a time */ |
| if (gpu->crashstate) |
| return; |
| |
| state = gpu->funcs->gpu_state_get(gpu); |
| if (IS_ERR_OR_NULL(state)) |
| return; |
| |
| /* Fill in the additional crash state information */ |
| state->comm = kstrdup(comm, GFP_KERNEL); |
| state->cmd = kstrdup(cmd, GFP_KERNEL); |
| state->fault_info = gpu->fault_info; |
| |
| if (submit) { |
| int i; |
| |
| state->bos = kcalloc(submit->nr_bos, |
| sizeof(struct msm_gpu_state_bo), GFP_KERNEL); |
| |
| for (i = 0; state->bos && i < submit->nr_bos; i++) { |
| msm_gpu_crashstate_get_bo(state, submit->bos[i].obj, |
| submit->bos[i].iova, |
| should_dump(submit, i)); |
| } |
| } |
| |
| /* Set the active crash state to be dumped on failure */ |
| gpu->crashstate = state; |
| |
| /* FIXME: Release the crashstate if this errors out? */ |
| dev_coredumpm(gpu->dev->dev, THIS_MODULE, gpu, 0, GFP_KERNEL, |
| msm_gpu_devcoredump_read, msm_gpu_devcoredump_free); |
| } |
| #else |
| static void msm_gpu_crashstate_capture(struct msm_gpu *gpu, |
| struct msm_gem_submit *submit, char *comm, char *cmd) |
| { |
| } |
| #endif |
| |
| /* |
| * Hangcheck detection for locked gpu: |
| */ |
| |
| static struct msm_gem_submit * |
| find_submit(struct msm_ringbuffer *ring, uint32_t fence) |
| { |
| struct msm_gem_submit *submit; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ring->submit_lock, flags); |
| list_for_each_entry(submit, &ring->submits, node) { |
| if (submit->seqno == fence) { |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| return submit; |
| } |
| } |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| |
| return NULL; |
| } |
| |
| static void retire_submits(struct msm_gpu *gpu); |
| |
| static void get_comm_cmdline(struct msm_gem_submit *submit, char **comm, char **cmd) |
| { |
| struct msm_file_private *ctx = submit->queue->ctx; |
| struct task_struct *task; |
| |
| WARN_ON(!mutex_is_locked(&submit->gpu->lock)); |
| |
| /* Note that kstrdup will return NULL if argument is NULL: */ |
| *comm = kstrdup(ctx->comm, GFP_KERNEL); |
| *cmd = kstrdup(ctx->cmdline, GFP_KERNEL); |
| |
| task = get_pid_task(submit->pid, PIDTYPE_PID); |
| if (!task) |
| return; |
| |
| if (!*comm) |
| *comm = kstrdup(task->comm, GFP_KERNEL); |
| |
| if (!*cmd) |
| *cmd = kstrdup_quotable_cmdline(task, GFP_KERNEL); |
| |
| put_task_struct(task); |
| } |
| |
| static void recover_worker(struct kthread_work *work) |
| { |
| struct msm_gpu *gpu = container_of(work, struct msm_gpu, recover_work); |
| struct drm_device *dev = gpu->dev; |
| struct msm_drm_private *priv = dev->dev_private; |
| struct msm_gem_submit *submit; |
| struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu); |
| char *comm = NULL, *cmd = NULL; |
| int i; |
| |
| mutex_lock(&gpu->lock); |
| |
| DRM_DEV_ERROR(dev->dev, "%s: hangcheck recover!\n", gpu->name); |
| |
| submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1); |
| if (submit) { |
| /* Increment the fault counts */ |
| submit->queue->faults++; |
| if (submit->aspace) |
| submit->aspace->faults++; |
| |
| get_comm_cmdline(submit, &comm, &cmd); |
| |
| if (comm && cmd) { |
| DRM_DEV_ERROR(dev->dev, "%s: offending task: %s (%s)\n", |
| gpu->name, comm, cmd); |
| |
| msm_rd_dump_submit(priv->hangrd, submit, |
| "offending task: %s (%s)", comm, cmd); |
| } else { |
| msm_rd_dump_submit(priv->hangrd, submit, NULL); |
| } |
| } else { |
| /* |
| * We couldn't attribute this fault to any particular context, |
| * so increment the global fault count instead. |
| */ |
| gpu->global_faults++; |
| } |
| |
| /* Record the crash state */ |
| pm_runtime_get_sync(&gpu->pdev->dev); |
| msm_gpu_crashstate_capture(gpu, submit, comm, cmd); |
| |
| kfree(cmd); |
| kfree(comm); |
| |
| /* |
| * Update all the rings with the latest and greatest fence.. this |
| * needs to happen after msm_rd_dump_submit() to ensure that the |
| * bo's referenced by the offending submit are still around. |
| */ |
| for (i = 0; i < gpu->nr_rings; i++) { |
| struct msm_ringbuffer *ring = gpu->rb[i]; |
| |
| uint32_t fence = ring->memptrs->fence; |
| |
| /* |
| * For the current (faulting?) ring/submit advance the fence by |
| * one more to clear the faulting submit |
| */ |
| if (ring == cur_ring) |
| ring->memptrs->fence = ++fence; |
| |
| msm_update_fence(ring->fctx, fence); |
| } |
| |
| if (msm_gpu_active(gpu)) { |
| /* retire completed submits, plus the one that hung: */ |
| retire_submits(gpu); |
| |
| gpu->funcs->recover(gpu); |
| |
| /* |
| * Replay all remaining submits starting with highest priority |
| * ring |
| */ |
| for (i = 0; i < gpu->nr_rings; i++) { |
| struct msm_ringbuffer *ring = gpu->rb[i]; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ring->submit_lock, flags); |
| list_for_each_entry(submit, &ring->submits, node) |
| gpu->funcs->submit(gpu, submit); |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| } |
| } |
| |
| pm_runtime_put(&gpu->pdev->dev); |
| |
| mutex_unlock(&gpu->lock); |
| |
| msm_gpu_retire(gpu); |
| } |
| |
| static void fault_worker(struct kthread_work *work) |
| { |
| struct msm_gpu *gpu = container_of(work, struct msm_gpu, fault_work); |
| struct msm_gem_submit *submit; |
| struct msm_ringbuffer *cur_ring = gpu->funcs->active_ring(gpu); |
| char *comm = NULL, *cmd = NULL; |
| |
| mutex_lock(&gpu->lock); |
| |
| submit = find_submit(cur_ring, cur_ring->memptrs->fence + 1); |
| if (submit && submit->fault_dumped) |
| goto resume_smmu; |
| |
| if (submit) { |
| get_comm_cmdline(submit, &comm, &cmd); |
| |
| /* |
| * When we get GPU iova faults, we can get 1000s of them, |
| * but we really only want to log the first one. |
| */ |
| submit->fault_dumped = true; |
| } |
| |
| /* Record the crash state */ |
| pm_runtime_get_sync(&gpu->pdev->dev); |
| msm_gpu_crashstate_capture(gpu, submit, comm, cmd); |
| pm_runtime_put_sync(&gpu->pdev->dev); |
| |
| kfree(cmd); |
| kfree(comm); |
| |
| resume_smmu: |
| memset(&gpu->fault_info, 0, sizeof(gpu->fault_info)); |
| gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu); |
| |
| mutex_unlock(&gpu->lock); |
| } |
| |
| static void hangcheck_timer_reset(struct msm_gpu *gpu) |
| { |
| struct msm_drm_private *priv = gpu->dev->dev_private; |
| mod_timer(&gpu->hangcheck_timer, |
| round_jiffies_up(jiffies + msecs_to_jiffies(priv->hangcheck_period))); |
| } |
| |
| static void hangcheck_handler(struct timer_list *t) |
| { |
| struct msm_gpu *gpu = from_timer(gpu, t, hangcheck_timer); |
| struct drm_device *dev = gpu->dev; |
| struct msm_ringbuffer *ring = gpu->funcs->active_ring(gpu); |
| uint32_t fence = ring->memptrs->fence; |
| |
| if (fence != ring->hangcheck_fence) { |
| /* some progress has been made.. ya! */ |
| ring->hangcheck_fence = fence; |
| } else if (fence_before(fence, ring->fctx->last_fence)) { |
| /* no progress and not done.. hung! */ |
| ring->hangcheck_fence = fence; |
| DRM_DEV_ERROR(dev->dev, "%s: hangcheck detected gpu lockup rb %d!\n", |
| gpu->name, ring->id); |
| DRM_DEV_ERROR(dev->dev, "%s: completed fence: %u\n", |
| gpu->name, fence); |
| DRM_DEV_ERROR(dev->dev, "%s: submitted fence: %u\n", |
| gpu->name, ring->fctx->last_fence); |
| |
| kthread_queue_work(gpu->worker, &gpu->recover_work); |
| } |
| |
| /* if still more pending work, reset the hangcheck timer: */ |
| if (fence_after(ring->fctx->last_fence, ring->hangcheck_fence)) |
| hangcheck_timer_reset(gpu); |
| |
| /* workaround for missing irq: */ |
| msm_gpu_retire(gpu); |
| } |
| |
| /* |
| * Performance Counters: |
| */ |
| |
| /* called under perf_lock */ |
| static int update_hw_cntrs(struct msm_gpu *gpu, uint32_t ncntrs, uint32_t *cntrs) |
| { |
| uint32_t current_cntrs[ARRAY_SIZE(gpu->last_cntrs)]; |
| int i, n = min(ncntrs, gpu->num_perfcntrs); |
| |
| /* read current values: */ |
| for (i = 0; i < gpu->num_perfcntrs; i++) |
| current_cntrs[i] = gpu_read(gpu, gpu->perfcntrs[i].sample_reg); |
| |
| /* update cntrs: */ |
| for (i = 0; i < n; i++) |
| cntrs[i] = current_cntrs[i] - gpu->last_cntrs[i]; |
| |
| /* save current values: */ |
| for (i = 0; i < gpu->num_perfcntrs; i++) |
| gpu->last_cntrs[i] = current_cntrs[i]; |
| |
| return n; |
| } |
| |
| static void update_sw_cntrs(struct msm_gpu *gpu) |
| { |
| ktime_t time; |
| uint32_t elapsed; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&gpu->perf_lock, flags); |
| if (!gpu->perfcntr_active) |
| goto out; |
| |
| time = ktime_get(); |
| elapsed = ktime_to_us(ktime_sub(time, gpu->last_sample.time)); |
| |
| gpu->totaltime += elapsed; |
| if (gpu->last_sample.active) |
| gpu->activetime += elapsed; |
| |
| gpu->last_sample.active = msm_gpu_active(gpu); |
| gpu->last_sample.time = time; |
| |
| out: |
| spin_unlock_irqrestore(&gpu->perf_lock, flags); |
| } |
| |
| void msm_gpu_perfcntr_start(struct msm_gpu *gpu) |
| { |
| unsigned long flags; |
| |
| pm_runtime_get_sync(&gpu->pdev->dev); |
| |
| spin_lock_irqsave(&gpu->perf_lock, flags); |
| /* we could dynamically enable/disable perfcntr registers too.. */ |
| gpu->last_sample.active = msm_gpu_active(gpu); |
| gpu->last_sample.time = ktime_get(); |
| gpu->activetime = gpu->totaltime = 0; |
| gpu->perfcntr_active = true; |
| update_hw_cntrs(gpu, 0, NULL); |
| spin_unlock_irqrestore(&gpu->perf_lock, flags); |
| } |
| |
| void msm_gpu_perfcntr_stop(struct msm_gpu *gpu) |
| { |
| gpu->perfcntr_active = false; |
| pm_runtime_put_sync(&gpu->pdev->dev); |
| } |
| |
| /* returns -errno or # of cntrs sampled */ |
| int msm_gpu_perfcntr_sample(struct msm_gpu *gpu, uint32_t *activetime, |
| uint32_t *totaltime, uint32_t ncntrs, uint32_t *cntrs) |
| { |
| unsigned long flags; |
| int ret; |
| |
| spin_lock_irqsave(&gpu->perf_lock, flags); |
| |
| if (!gpu->perfcntr_active) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| *activetime = gpu->activetime; |
| *totaltime = gpu->totaltime; |
| |
| gpu->activetime = gpu->totaltime = 0; |
| |
| ret = update_hw_cntrs(gpu, ncntrs, cntrs); |
| |
| out: |
| spin_unlock_irqrestore(&gpu->perf_lock, flags); |
| |
| return ret; |
| } |
| |
| /* |
| * Cmdstream submission/retirement: |
| */ |
| |
| static void retire_submit(struct msm_gpu *gpu, struct msm_ringbuffer *ring, |
| struct msm_gem_submit *submit) |
| { |
| int index = submit->seqno % MSM_GPU_SUBMIT_STATS_COUNT; |
| volatile struct msm_gpu_submit_stats *stats; |
| u64 elapsed, clock = 0, cycles; |
| unsigned long flags; |
| |
| stats = &ring->memptrs->stats[index]; |
| /* Convert 19.2Mhz alwayson ticks to nanoseconds for elapsed time */ |
| elapsed = (stats->alwayson_end - stats->alwayson_start) * 10000; |
| do_div(elapsed, 192); |
| |
| cycles = stats->cpcycles_end - stats->cpcycles_start; |
| |
| /* Calculate the clock frequency from the number of CP cycles */ |
| if (elapsed) { |
| clock = cycles * 1000; |
| do_div(clock, elapsed); |
| } |
| |
| submit->queue->ctx->elapsed_ns += elapsed; |
| submit->queue->ctx->cycles += cycles; |
| |
| trace_msm_gpu_submit_retired(submit, elapsed, clock, |
| stats->alwayson_start, stats->alwayson_end); |
| |
| msm_submit_retire(submit); |
| |
| pm_runtime_mark_last_busy(&gpu->pdev->dev); |
| |
| spin_lock_irqsave(&ring->submit_lock, flags); |
| list_del(&submit->node); |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| |
| /* Update devfreq on transition from active->idle: */ |
| mutex_lock(&gpu->active_lock); |
| gpu->active_submits--; |
| WARN_ON(gpu->active_submits < 0); |
| if (!gpu->active_submits) { |
| msm_devfreq_idle(gpu); |
| pm_runtime_put_autosuspend(&gpu->pdev->dev); |
| } |
| |
| mutex_unlock(&gpu->active_lock); |
| |
| msm_gem_submit_put(submit); |
| } |
| |
| static void retire_submits(struct msm_gpu *gpu) |
| { |
| int i; |
| |
| /* Retire the commits starting with highest priority */ |
| for (i = 0; i < gpu->nr_rings; i++) { |
| struct msm_ringbuffer *ring = gpu->rb[i]; |
| |
| while (true) { |
| struct msm_gem_submit *submit = NULL; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ring->submit_lock, flags); |
| submit = list_first_entry_or_null(&ring->submits, |
| struct msm_gem_submit, node); |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| |
| /* |
| * If no submit, we are done. If submit->fence hasn't |
| * been signalled, then later submits are not signalled |
| * either, so we are also done. |
| */ |
| if (submit && dma_fence_is_signaled(submit->hw_fence)) { |
| retire_submit(gpu, ring, submit); |
| } else { |
| break; |
| } |
| } |
| } |
| |
| wake_up_all(&gpu->retire_event); |
| } |
| |
| static void retire_worker(struct kthread_work *work) |
| { |
| struct msm_gpu *gpu = container_of(work, struct msm_gpu, retire_work); |
| |
| retire_submits(gpu); |
| } |
| |
| /* call from irq handler to schedule work to retire bo's */ |
| void msm_gpu_retire(struct msm_gpu *gpu) |
| { |
| int i; |
| |
| for (i = 0; i < gpu->nr_rings; i++) |
| msm_update_fence(gpu->rb[i]->fctx, gpu->rb[i]->memptrs->fence); |
| |
| kthread_queue_work(gpu->worker, &gpu->retire_work); |
| update_sw_cntrs(gpu); |
| } |
| |
| /* add bo's to gpu's ring, and kick gpu: */ |
| void msm_gpu_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit) |
| { |
| struct drm_device *dev = gpu->dev; |
| struct msm_drm_private *priv = dev->dev_private; |
| struct msm_ringbuffer *ring = submit->ring; |
| unsigned long flags; |
| |
| WARN_ON(!mutex_is_locked(&gpu->lock)); |
| |
| pm_runtime_get_sync(&gpu->pdev->dev); |
| |
| msm_gpu_hw_init(gpu); |
| |
| submit->seqno = submit->hw_fence->seqno; |
| |
| msm_rd_dump_submit(priv->rd, submit, NULL); |
| |
| update_sw_cntrs(gpu); |
| |
| /* |
| * ring->submits holds a ref to the submit, to deal with the case |
| * that a submit completes before msm_ioctl_gem_submit() returns. |
| */ |
| msm_gem_submit_get(submit); |
| |
| spin_lock_irqsave(&ring->submit_lock, flags); |
| list_add_tail(&submit->node, &ring->submits); |
| spin_unlock_irqrestore(&ring->submit_lock, flags); |
| |
| /* Update devfreq on transition from idle->active: */ |
| mutex_lock(&gpu->active_lock); |
| if (!gpu->active_submits) { |
| pm_runtime_get(&gpu->pdev->dev); |
| msm_devfreq_active(gpu); |
| } |
| gpu->active_submits++; |
| mutex_unlock(&gpu->active_lock); |
| |
| gpu->funcs->submit(gpu, submit); |
| gpu->cur_ctx_seqno = submit->queue->ctx->seqno; |
| |
| pm_runtime_put(&gpu->pdev->dev); |
| hangcheck_timer_reset(gpu); |
| } |
| |
| /* |
| * Init/Cleanup: |
| */ |
| |
| static irqreturn_t irq_handler(int irq, void *data) |
| { |
| struct msm_gpu *gpu = data; |
| return gpu->funcs->irq(gpu); |
| } |
| |
| static int get_clocks(struct platform_device *pdev, struct msm_gpu *gpu) |
| { |
| int ret = devm_clk_bulk_get_all(&pdev->dev, &gpu->grp_clks); |
| |
| if (ret < 1) { |
| gpu->nr_clocks = 0; |
| return ret; |
| } |
| |
| gpu->nr_clocks = ret; |
| |
| gpu->core_clk = msm_clk_bulk_get_clock(gpu->grp_clks, |
| gpu->nr_clocks, "core"); |
| |
| gpu->rbbmtimer_clk = msm_clk_bulk_get_clock(gpu->grp_clks, |
| gpu->nr_clocks, "rbbmtimer"); |
| |
| return 0; |
| } |
| |
| /* Return a new address space for a msm_drm_private instance */ |
| struct msm_gem_address_space * |
| msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *task) |
| { |
| struct msm_gem_address_space *aspace = NULL; |
| if (!gpu) |
| return NULL; |
| |
| /* |
| * If the target doesn't support private address spaces then return |
| * the global one |
| */ |
| if (gpu->funcs->create_private_address_space) { |
| aspace = gpu->funcs->create_private_address_space(gpu); |
| if (!IS_ERR(aspace)) |
| aspace->pid = get_pid(task_pid(task)); |
| } |
| |
| if (IS_ERR_OR_NULL(aspace)) |
| aspace = msm_gem_address_space_get(gpu->aspace); |
| |
| return aspace; |
| } |
| |
| int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, |
| struct msm_gpu *gpu, const struct msm_gpu_funcs *funcs, |
| const char *name, struct msm_gpu_config *config) |
| { |
| int i, ret, nr_rings = config->nr_rings; |
| void *memptrs; |
| uint64_t memptrs_iova; |
| |
| if (WARN_ON(gpu->num_perfcntrs > ARRAY_SIZE(gpu->last_cntrs))) |
| gpu->num_perfcntrs = ARRAY_SIZE(gpu->last_cntrs); |
| |
| gpu->dev = drm; |
| gpu->funcs = funcs; |
| gpu->name = name; |
| |
| gpu->worker = kthread_create_worker(0, "gpu-worker"); |
| if (IS_ERR(gpu->worker)) { |
| ret = PTR_ERR(gpu->worker); |
| gpu->worker = NULL; |
| goto fail; |
| } |
| |
| sched_set_fifo_low(gpu->worker->task); |
| |
| mutex_init(&gpu->active_lock); |
| mutex_init(&gpu->lock); |
| init_waitqueue_head(&gpu->retire_event); |
| kthread_init_work(&gpu->retire_work, retire_worker); |
| kthread_init_work(&gpu->recover_work, recover_worker); |
| kthread_init_work(&gpu->fault_work, fault_worker); |
| |
| timer_setup(&gpu->hangcheck_timer, hangcheck_handler, 0); |
| |
| spin_lock_init(&gpu->perf_lock); |
| |
| |
| /* Map registers: */ |
| gpu->mmio = msm_ioremap(pdev, config->ioname); |
| if (IS_ERR(gpu->mmio)) { |
| ret = PTR_ERR(gpu->mmio); |
| goto fail; |
| } |
| |
| /* Get Interrupt: */ |
| gpu->irq = platform_get_irq(pdev, 0); |
| if (gpu->irq < 0) { |
| ret = gpu->irq; |
| DRM_DEV_ERROR(drm->dev, "failed to get irq: %d\n", ret); |
| goto fail; |
| } |
| |
| ret = devm_request_irq(&pdev->dev, gpu->irq, irq_handler, |
| IRQF_TRIGGER_HIGH, "gpu-irq", gpu); |
| if (ret) { |
| DRM_DEV_ERROR(drm->dev, "failed to request IRQ%u: %d\n", gpu->irq, ret); |
| goto fail; |
| } |
| |
| ret = get_clocks(pdev, gpu); |
| if (ret) |
| goto fail; |
| |
| gpu->ebi1_clk = msm_clk_get(pdev, "bus"); |
| DBG("ebi1_clk: %p", gpu->ebi1_clk); |
| if (IS_ERR(gpu->ebi1_clk)) |
| gpu->ebi1_clk = NULL; |
| |
| /* Acquire regulators: */ |
| gpu->gpu_reg = devm_regulator_get(&pdev->dev, "vdd"); |
| DBG("gpu_reg: %p", gpu->gpu_reg); |
| if (IS_ERR(gpu->gpu_reg)) |
| gpu->gpu_reg = NULL; |
| |
| gpu->gpu_cx = devm_regulator_get(&pdev->dev, "vddcx"); |
| DBG("gpu_cx: %p", gpu->gpu_cx); |
| if (IS_ERR(gpu->gpu_cx)) |
| gpu->gpu_cx = NULL; |
| |
| gpu->cx_collapse = devm_reset_control_get_optional_exclusive(&pdev->dev, |
| "cx_collapse"); |
| |
| gpu->pdev = pdev; |
| platform_set_drvdata(pdev, &gpu->adreno_smmu); |
| |
| msm_devfreq_init(gpu); |
| |
| |
| gpu->aspace = gpu->funcs->create_address_space(gpu, pdev); |
| |
| if (gpu->aspace == NULL) |
| DRM_DEV_INFO(drm->dev, "%s: no IOMMU, fallback to VRAM carveout!\n", name); |
| else if (IS_ERR(gpu->aspace)) { |
| ret = PTR_ERR(gpu->aspace); |
| goto fail; |
| } |
| |
| memptrs = msm_gem_kernel_new(drm, |
| sizeof(struct msm_rbmemptrs) * nr_rings, |
| check_apriv(gpu, MSM_BO_WC), gpu->aspace, &gpu->memptrs_bo, |
| &memptrs_iova); |
| |
| if (IS_ERR(memptrs)) { |
| ret = PTR_ERR(memptrs); |
| DRM_DEV_ERROR(drm->dev, "could not allocate memptrs: %d\n", ret); |
| goto fail; |
| } |
| |
| msm_gem_object_set_name(gpu->memptrs_bo, "memptrs"); |
| |
| if (nr_rings > ARRAY_SIZE(gpu->rb)) { |
| DRM_DEV_INFO_ONCE(drm->dev, "Only creating %zu ringbuffers\n", |
| ARRAY_SIZE(gpu->rb)); |
| nr_rings = ARRAY_SIZE(gpu->rb); |
| } |
| |
| /* Create ringbuffer(s): */ |
| for (i = 0; i < nr_rings; i++) { |
| gpu->rb[i] = msm_ringbuffer_new(gpu, i, memptrs, memptrs_iova); |
| |
| if (IS_ERR(gpu->rb[i])) { |
| ret = PTR_ERR(gpu->rb[i]); |
| DRM_DEV_ERROR(drm->dev, |
| "could not create ringbuffer %d: %d\n", i, ret); |
| goto fail; |
| } |
| |
| memptrs += sizeof(struct msm_rbmemptrs); |
| memptrs_iova += sizeof(struct msm_rbmemptrs); |
| } |
| |
| gpu->nr_rings = nr_rings; |
| |
| refcount_set(&gpu->sysprof_active, 1); |
| |
| return 0; |
| |
| fail: |
| for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) { |
| msm_ringbuffer_destroy(gpu->rb[i]); |
| gpu->rb[i] = NULL; |
| } |
| |
| msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace); |
| |
| platform_set_drvdata(pdev, NULL); |
| return ret; |
| } |
| |
| void msm_gpu_cleanup(struct msm_gpu *gpu) |
| { |
| int i; |
| |
| DBG("%s", gpu->name); |
| |
| for (i = 0; i < ARRAY_SIZE(gpu->rb); i++) { |
| msm_ringbuffer_destroy(gpu->rb[i]); |
| gpu->rb[i] = NULL; |
| } |
| |
| msm_gem_kernel_put(gpu->memptrs_bo, gpu->aspace); |
| |
| if (!IS_ERR_OR_NULL(gpu->aspace)) { |
| gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu); |
| msm_gem_address_space_put(gpu->aspace); |
| } |
| |
| if (gpu->worker) { |
| kthread_destroy_worker(gpu->worker); |
| } |
| |
| msm_devfreq_cleanup(gpu); |
| |
| platform_set_drvdata(gpu->pdev, NULL); |
| } |