diff options
| -rw-r--r-- | Documentation/gpu/drm-usage-stats.rst | 1 | ||||
| -rw-r--r-- | Documentation/gpu/panfrost.rst | 40 | ||||
| -rw-r--r-- | MAINTAINERS | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/Makefile | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_debugfs.c | 21 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_debugfs.h | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.h | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_drv.c | 58 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gpu.c | 41 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gpu.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_job.c | 24 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_job.h | 5 |
15 files changed, 236 insertions, 1 deletions
diff --git a/Documentation/gpu/drm-usage-stats.rst b/Documentation/gpu/drm-usage-stats.rst index fe35a291ff3e..8d963cd7c1b7 100644 --- a/Documentation/gpu/drm-usage-stats.rst +++ b/Documentation/gpu/drm-usage-stats.rst @@ -169,3 +169,4 @@ Driver specific implementations ------------------------------- :ref:`i915-usage-stats` +:ref:`panfrost-usage-stats` diff --git a/Documentation/gpu/panfrost.rst b/Documentation/gpu/panfrost.rst new file mode 100644 index 000000000000..b80e41f4b2c5 --- /dev/null +++ b/Documentation/gpu/panfrost.rst @@ -0,0 +1,40 @@ +.. SPDX-License-Identifier: GPL-2.0+ + +========================= + drm/Panfrost Mali Driver +========================= + +.. _panfrost-usage-stats: + +Panfrost DRM client usage stats implementation +============================================== + +The drm/Panfrost driver implements the DRM client usage stats specification as +documented in :ref:`drm-client-usage-stats`. + +Example of the output showing the implemented key value pairs and entirety of +the currently possible format options: + +:: + pos: 0 + flags: 02400002 + mnt_id: 27 + ino: 531 + drm-driver: panfrost + drm-client-id: 14 + drm-engine-fragment: 1846584880 ns + drm-cycles-fragment: 1424359409 + drm-maxfreq-fragment: 799999987 Hz + drm-curfreq-fragment: 799999987 Hz + drm-engine-vertex-tiler: 71932239 ns + drm-cycles-vertex-tiler: 52617357 + drm-maxfreq-vertex-tiler: 799999987 Hz + drm-curfreq-vertex-tiler: 799999987 Hz + drm-total-memory: 290 MiB + drm-shared-memory: 0 MiB + drm-active-memory: 226 MiB + drm-resident-memory: 36496 KiB + drm-purgeable-memory: 128 KiB + +Possible `drm-engine-` key names are: `fragment`, and `vertex-tiler`. +`drm-curfreq-` values convey the current operating frequency for that engine. diff --git a/MAINTAINERS b/MAINTAINERS index d787a18a76c4..46ca5c4affdb 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1620,6 +1620,7 @@ R: Steven Price <steven.price@arm.com> L: dri-devel@lists.freedesktop.org S: Supported T: git git://anongit.freedesktop.org/drm/drm-misc +F: Documentation/gpu/panfrost.rst F: drivers/gpu/drm/panfrost/ F: include/uapi/drm/panfrost_drm.h diff --git a/drivers/gpu/drm/panfrost/Makefile b/drivers/gpu/drm/panfrost/Makefile index 7da2b3f02ed9..2c01c1e7523e 100644 --- a/drivers/gpu/drm/panfrost/Makefile +++ b/drivers/gpu/drm/panfrost/Makefile @@ -12,4 +12,6 @@ panfrost-y := \ panfrost_perfcnt.o \ panfrost_dump.o +panfrost-$(CONFIG_DEBUG_FS) += panfrost_debugfs.o + obj-$(CONFIG_DRM_PANFROST) += panfrost.o diff --git a/drivers/gpu/drm/panfrost/panfrost_debugfs.c b/drivers/gpu/drm/panfrost/panfrost_debugfs.c new file mode 100644 index 000000000000..72d4286a6bf7 --- /dev/null +++ b/drivers/gpu/drm/panfrost/panfrost_debugfs.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright 2023 Collabora ltd. */ +/* Copyright 2023 Amazon.com, Inc. or its affiliates. */ + +#include <linux/debugfs.h> +#include <linux/platform_device.h> +#include <drm/drm_debugfs.h> +#include <drm/drm_file.h> +#include <drm/panfrost_drm.h> + +#include "panfrost_device.h" +#include "panfrost_gpu.h" +#include "panfrost_debugfs.h" + +void panfrost_debugfs_init(struct drm_minor *minor) +{ + struct drm_device *dev = minor->dev; + struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev->dev)); + + debugfs_create_atomic_t("profile", 0600, minor->debugfs_root, &pfdev->profile_mode); +} diff --git a/drivers/gpu/drm/panfrost/panfrost_debugfs.h b/drivers/gpu/drm/panfrost/panfrost_debugfs.h new file mode 100644 index 000000000000..c5af5f35877f --- /dev/null +++ b/drivers/gpu/drm/panfrost/panfrost_debugfs.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2023 Collabora ltd. + * Copyright 2023 Amazon.com, Inc. or its affiliates. + */ + +#ifndef PANFROST_DEBUGFS_H +#define PANFROST_DEBUGFS_H + +#ifdef CONFIG_DEBUG_FS +void panfrost_debugfs_init(struct drm_minor *minor); +#endif + +#endif /* PANFROST_DEBUGFS_H */ diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 58dfb15a8757..28caffc689e2 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -58,6 +58,7 @@ static int panfrost_devfreq_get_dev_status(struct device *dev, spin_lock_irqsave(&pfdevfreq->lock, irqflags); panfrost_devfreq_update_utilization(pfdevfreq); + pfdevfreq->current_frequency = status->current_frequency; status->total_time = ktime_to_ns(ktime_add(pfdevfreq->busy_time, pfdevfreq->idle_time)); @@ -117,6 +118,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) struct devfreq *devfreq; struct thermal_cooling_device *cooling; struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq; + unsigned long freq = ULONG_MAX; if (pfdev->comp->num_supplies > 1) { /* @@ -172,6 +174,12 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) return ret; } + /* Find the fastest defined rate */ + opp = dev_pm_opp_find_freq_floor(dev, &freq); + if (IS_ERR(opp)) + return PTR_ERR(opp); + pfdevfreq->fast_rate = freq; + dev_pm_opp_put(opp); /* diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.h b/drivers/gpu/drm/panfrost/panfrost_devfreq.h index 1514c1f9d91c..48dbe185f206 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.h +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.h @@ -19,6 +19,9 @@ struct panfrost_devfreq { struct devfreq_simple_ondemand_data gov_data; bool opp_of_table_added; + unsigned long current_frequency; + unsigned long fast_rate; + ktime_t busy_time; ktime_t idle_time; ktime_t time_last_update; diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index fa1a086a862b..28f7046e1b1a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -207,6 +207,8 @@ int panfrost_device_init(struct panfrost_device *pfdev) spin_lock_init(&pfdev->as_lock); + spin_lock_init(&pfdev->cycle_counter.lock); + err = panfrost_clk_init(pfdev); if (err) { dev_err(pfdev->dev, "clk init failed %d\n", err); diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index b0126b9fbadc..1e85656dc2f7 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -107,6 +107,7 @@ struct panfrost_device { struct list_head scheduled_jobs; struct panfrost_perfcnt *perfcnt; + atomic_t profile_mode; struct mutex sched_lock; @@ -121,6 +122,11 @@ struct panfrost_device { struct shrinker shrinker; struct panfrost_devfreq pfdevfreq; + + struct { + atomic_t use_count; + spinlock_t lock; + } cycle_counter; }; struct panfrost_mmu { @@ -135,12 +141,19 @@ struct panfrost_mmu { struct list_head list; }; +struct panfrost_engine_usage { + unsigned long long elapsed_ns[NUM_JOB_SLOTS]; + unsigned long long cycles[NUM_JOB_SLOTS]; +}; + struct panfrost_file_priv { struct panfrost_device *pfdev; struct drm_sched_entity sched_entity[NUM_JOB_SLOTS]; struct panfrost_mmu *mmu; + + struct panfrost_engine_usage engine_usage; }; static inline struct panfrost_device *to_panfrost_device(struct drm_device *ddev) diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index a2ab99698ca8..97e5bc4a82c8 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -20,6 +20,7 @@ #include "panfrost_job.h" #include "panfrost_gpu.h" #include "panfrost_perfcnt.h" +#include "panfrost_debugfs.h" static bool unstable_ioctls; module_param_unsafe(unstable_ioctls, bool, 0600); @@ -267,6 +268,7 @@ static int panfrost_ioctl_submit(struct drm_device *dev, void *data, job->requirements = args->requirements; job->flush_id = panfrost_gpu_get_latest_flush_id(pfdev); job->mmu = file_priv->mmu; + job->engine_usage = &file_priv->engine_usage; slot = panfrost_job_get_slot(job); @@ -523,7 +525,56 @@ static const struct drm_ioctl_desc panfrost_drm_driver_ioctls[] = { PANFROST_IOCTL(MADVISE, madvise, DRM_RENDER_ALLOW), }; -DEFINE_DRM_GEM_FOPS(panfrost_drm_driver_fops); +static void panfrost_gpu_show_fdinfo(struct panfrost_device *pfdev, + struct panfrost_file_priv *panfrost_priv, + struct drm_printer *p) +{ + int i; + + /* + * IMPORTANT NOTE: drm-cycles and drm-engine measurements are not + * accurate, as they only provide a rough estimation of the number of + * GPU cycles and CPU time spent in a given context. This is due to two + * different factors: + * - Firstly, we must consider the time the CPU and then the kernel + * takes to process the GPU interrupt, which means additional time and + * GPU cycles will be added in excess to the real figure. + * - Secondly, the pipelining done by the Job Manager (2 job slots per + * engine) implies there is no way to know exactly how much time each + * job spent on the GPU. + */ + + static const char * const engine_names[] = { + "fragment", "vertex-tiler", "compute-only" + }; + + BUILD_BUG_ON(ARRAY_SIZE(engine_names) != NUM_JOB_SLOTS); + + for (i = 0; i < NUM_JOB_SLOTS - 1; i++) { + drm_printf(p, "drm-engine-%s:\t%llu ns\n", + engine_names[i], panfrost_priv->engine_usage.elapsed_ns[i]); + drm_printf(p, "drm-cycles-%s:\t%llu\n", + engine_names[i], panfrost_priv->engine_usage.cycles[i]); + drm_printf(p, "drm-maxfreq-%s:\t%lu Hz\n", + engine_names[i], pfdev->pfdevfreq.fast_rate); + drm_printf(p, "drm-curfreq-%s:\t%lu Hz\n", + engine_names[i], pfdev->pfdevfreq.current_frequency); + } +} + +static void panfrost_show_fdinfo(struct drm_printer *p, struct drm_file *file) +{ + struct drm_device *dev = file->minor->dev; + struct panfrost_device *pfdev = dev->dev_private; + + panfrost_gpu_show_fdinfo(pfdev, file->driver_priv, p); +} + +static const struct file_operations panfrost_drm_driver_fops = { + .owner = THIS_MODULE, + DRM_GEM_FOPS, + .show_fdinfo = drm_show_fdinfo, +}; /* * Panfrost driver version: @@ -535,6 +586,7 @@ static const struct drm_driver panfrost_drm_driver = { .driver_features = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ, .open = panfrost_open, .postclose = panfrost_postclose, + .show_fdinfo = panfrost_show_fdinfo, .ioctls = panfrost_drm_driver_ioctls, .num_ioctls = ARRAY_SIZE(panfrost_drm_driver_ioctls), .fops = &panfrost_drm_driver_fops, @@ -546,6 +598,10 @@ static const struct drm_driver panfrost_drm_driver = { .gem_create_object = panfrost_gem_create_object, .gem_prime_import_sg_table = panfrost_gem_prime_import_sg_table, + +#ifdef CONFIG_DEBUG_FS + .debugfs_init = panfrost_debugfs_init, +#endif }; static int panfrost_probe(struct platform_device *pdev) diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index 2faa344d89ee..f0be7e19b13e 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -73,6 +73,13 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev) gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL); gpu_write(pfdev, GPU_INT_MASK, GPU_IRQ_MASK_ALL); + /* + * All in-flight jobs should have released their cycle + * counter references upon reset, but let us make sure + */ + if (drm_WARN_ON(pfdev->ddev, atomic_read(&pfdev->cycle_counter.use_count) != 0)) + atomic_set(&pfdev->cycle_counter.use_count, 0); + return 0; } @@ -321,6 +328,40 @@ static void panfrost_gpu_init_features(struct panfrost_device *pfdev) pfdev->features.shader_present, pfdev->features.l2_present); } +void panfrost_cycle_counter_get(struct panfrost_device *pfdev) +{ + if (atomic_inc_not_zero(&pfdev->cycle_counter.use_count)) + return; + + spin_lock(&pfdev->cycle_counter.lock); + if (atomic_inc_return(&pfdev->cycle_counter.use_count) == 1) + gpu_write(pfdev, GPU_CMD, GPU_CMD_CYCLE_COUNT_START); + spin_unlock(&pfdev->cycle_counter.lock); +} + +void panfrost_cycle_counter_put(struct panfrost_device *pfdev) +{ + if (atomic_add_unless(&pfdev->cycle_counter.use_count, -1, 1)) + return; + + spin_lock(&pfdev->cycle_counter.lock); + if (atomic_dec_return(&pfdev->cycle_counter.use_count) == 0) + gpu_write(pfdev, GPU_CMD, GPU_CMD_CYCLE_COUNT_STOP); + spin_unlock(&pfdev->cycle_counter.lock); +} + +unsigned long long panfrost_cycle_counter_read(struct panfrost_device *pfdev) +{ + u32 hi, lo; + + do { + hi = gpu_read(pfdev, GPU_CYCLE_COUNT_HI); + lo = gpu_read(pfdev, GPU_CYCLE_COUNT_LO); + } while (hi != gpu_read(pfdev, GPU_CYCLE_COUNT_HI)); + + return ((u64)hi << 32) | lo; +} + void panfrost_gpu_power_on(struct panfrost_device *pfdev) { int ret; diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.h b/drivers/gpu/drm/panfrost/panfrost_gpu.h index 468c51e7e46d..876fdad9f721 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.h +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.h @@ -16,6 +16,10 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev); void panfrost_gpu_power_on(struct panfrost_device *pfdev); void panfrost_gpu_power_off(struct panfrost_device *pfdev); +void panfrost_cycle_counter_get(struct panfrost_device *pfdev); +void panfrost_cycle_counter_put(struct panfrost_device *pfdev); +unsigned long long panfrost_cycle_counter_read(struct panfrost_device *pfdev); + void panfrost_gpu_amlogic_quirk(struct panfrost_device *pfdev); #endif diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 033f5e684707..fb16de2d0420 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -159,6 +159,16 @@ panfrost_dequeue_job(struct panfrost_device *pfdev, int slot) struct panfrost_job *job = pfdev->jobs[slot][0]; WARN_ON(!job); + if (job->is_profiled) { + if (job->engine_usage) { + job->engine_usage->elapsed_ns[slot] += + ktime_to_ns(ktime_sub(ktime_get(), job->start_time)); + job->engine_usage->cycles[slot] += + panfrost_cycle_counter_read(pfdev) - job->start_cycles; + } + panfrost_cycle_counter_put(job->pfdev); + } + pfdev->jobs[slot][0] = pfdev->jobs[slot][1]; pfdev->jobs[slot][1] = NULL; @@ -233,6 +243,13 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js) subslot = panfrost_enqueue_job(pfdev, js, job); /* Don't queue the job if a reset is in progress */ if (!atomic_read(&pfdev->reset.pending)) { + if (atomic_read(&pfdev->profile_mode)) { + panfrost_cycle_counter_get(pfdev); + job->is_profiled = true; + job->start_time = ktime_get(); + job->start_cycles = panfrost_cycle_counter_read(pfdev); + } + job_write(pfdev, JS_COMMAND_NEXT(js), JS_COMMAND_START); dev_dbg(pfdev->dev, "JS: Submitting atom %p to js[%d][%d] with head=0x%llx AS %d", @@ -660,10 +677,14 @@ panfrost_reset(struct panfrost_device *pfdev, * stuck jobs. Let's make sure the PM counters stay balanced by * manually calling pm_runtime_put_noidle() and * panfrost_devfreq_record_idle() for each stuck job. + * Let's also make sure the cycle counting register's refcnt is + * kept balanced to prevent it from running forever */ spin_lock(&pfdev->js->job_lock); for (i = 0; i < NUM_JOB_SLOTS; i++) { for (j = 0; j < ARRAY_SIZE(pfdev->jobs[0]) && pfdev->jobs[i][j]; j++) { + if (pfdev->jobs[i][j]->is_profiled) + panfrost_cycle_counter_put(pfdev->jobs[i][j]->pfdev); pm_runtime_put_noidle(pfdev->dev); panfrost_devfreq_record_idle(&pfdev->pfdevfreq); } @@ -926,6 +947,9 @@ void panfrost_job_close(struct panfrost_file_priv *panfrost_priv) } job_write(pfdev, JS_COMMAND(i), cmd); + + /* Jobs can outlive their file context */ + job->engine_usage = NULL; } } spin_unlock(&pfdev->js->job_lock); diff --git a/drivers/gpu/drm/panfrost/panfrost_job.h b/drivers/gpu/drm/panfrost/panfrost_job.h index 8becc1ba0eb9..17ff808dba07 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.h +++ b/drivers/gpu/drm/panfrost/panfrost_job.h @@ -32,6 +32,11 @@ struct panfrost_job { /* Fence to be signaled by drm-sched once its done with the job */ struct dma_fence *render_done_fence; + + struct panfrost_engine_usage *engine_usage; + bool is_profiled; + ktime_t start_time; + u64 start_cycles; }; int panfrost_job_init(struct panfrost_device *pfdev); |