diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gpu.c')
-rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 1033 |
1 files changed, 1033 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c new file mode 100644 index 000000000..380249500 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -0,0 +1,1033 @@ +// 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 bool made_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring) +{ + if (ring->hangcheck_progress_retries >= DRM_MSM_HANGCHECK_PROGRESS_RETRIES) + return false; + + if (!gpu->funcs->progress) + return false; + + if (!gpu->funcs->progress(gpu, ring)) + return false; + + ring->hangcheck_progress_retries++; + return true; +} + +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; + ring->hangcheck_progress_retries = 0; + } else if (fence_before(fence, ring->fctx->last_fence) && + !made_progress(gpu, ring)) { + /* no progress and not done.. hung! */ + ring->hangcheck_fence = fence; + ring->hangcheck_progress_retries = 0; + 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) +{ + struct msm_drm_private *priv = drm->dev_private; + 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); + + priv->hangcheck_period = DRM_MSM_HANGCHECK_DEFAULT_PERIOD; + + /* + * If progress detection is supported, halve the hangcheck timer + * duration, as it takes two iterations of the hangcheck handler + * to detect a hang. + */ + if (funcs->progress) + priv->hangcheck_period /= 2; + + 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); +} |