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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7786fd1087
Expose performance counters through 2 driver specific ioctls: one to enable/disable the perfcnt block, and one to dump the counter values. There are discussions to expose global performance monitors (those counters that can't be retrieved on a per-job basis) in a consistent way, but this is likely to take time to settle on something that works for various HW/users. The ioctls are marked unstable so we can get rid of them when the time comes. We initally went for a debugfs-based interface, but this was making the transition to per-FD address space more complicated (we need to specify the namespace the GPU has to use when dumping the perf counters), hence the decision to switch back to driver specific ioctls which are passed the FD they operate on and thus will have a dedicated address space attached to them. Other than that, the implementation is pretty simple: it basically dumps all counters and copy the values to a userspace buffer. The parsing is left to userspace which has to know the specific layout that's used by the GPU (layout differs on a per-revision basis). Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190618081648.17297-5-boris.brezillon@collabora.com
288 lines
7.0 KiB
C
288 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
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/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
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#include <linux/clk.h>
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#include <linux/reset.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regulator/consumer.h>
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#include "panfrost_device.h"
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#include "panfrost_devfreq.h"
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#include "panfrost_features.h"
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#include "panfrost_gpu.h"
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#include "panfrost_job.h"
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#include "panfrost_mmu.h"
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#include "panfrost_perfcnt.h"
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static int panfrost_reset_init(struct panfrost_device *pfdev)
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{
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int err;
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pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
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if (IS_ERR(pfdev->rstc)) {
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dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
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return PTR_ERR(pfdev->rstc);
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}
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err = reset_control_deassert(pfdev->rstc);
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if (err)
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return err;
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return 0;
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}
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static void panfrost_reset_fini(struct panfrost_device *pfdev)
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{
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reset_control_assert(pfdev->rstc);
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}
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static int panfrost_clk_init(struct panfrost_device *pfdev)
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{
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int err;
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unsigned long rate;
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pfdev->clock = devm_clk_get(pfdev->dev, NULL);
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if (IS_ERR(pfdev->clock)) {
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dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
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return PTR_ERR(pfdev->clock);
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}
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rate = clk_get_rate(pfdev->clock);
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dev_info(pfdev->dev, "clock rate = %lu\n", rate);
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err = clk_prepare_enable(pfdev->clock);
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if (err)
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return err;
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pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
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if (IS_ERR(pfdev->bus_clock)) {
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dev_err(pfdev->dev, "get bus_clock failed %ld\n",
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PTR_ERR(pfdev->bus_clock));
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return PTR_ERR(pfdev->bus_clock);
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}
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if (pfdev->bus_clock) {
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rate = clk_get_rate(pfdev->bus_clock);
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dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
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err = clk_prepare_enable(pfdev->bus_clock);
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if (err)
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goto disable_clock;
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}
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return 0;
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disable_clock:
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clk_disable_unprepare(pfdev->clock);
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return err;
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}
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static void panfrost_clk_fini(struct panfrost_device *pfdev)
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{
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clk_disable_unprepare(pfdev->bus_clock);
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clk_disable_unprepare(pfdev->clock);
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}
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static int panfrost_regulator_init(struct panfrost_device *pfdev)
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{
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int ret;
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pfdev->regulator = devm_regulator_get_optional(pfdev->dev, "mali");
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if (IS_ERR(pfdev->regulator)) {
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ret = PTR_ERR(pfdev->regulator);
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pfdev->regulator = NULL;
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if (ret == -ENODEV)
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return 0;
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dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
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return ret;
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}
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ret = regulator_enable(pfdev->regulator);
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if (ret < 0) {
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dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static void panfrost_regulator_fini(struct panfrost_device *pfdev)
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{
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if (pfdev->regulator)
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regulator_disable(pfdev->regulator);
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}
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int panfrost_device_init(struct panfrost_device *pfdev)
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{
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int err;
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struct resource *res;
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mutex_init(&pfdev->sched_lock);
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mutex_init(&pfdev->reset_lock);
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INIT_LIST_HEAD(&pfdev->scheduled_jobs);
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spin_lock_init(&pfdev->hwaccess_lock);
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err = panfrost_clk_init(pfdev);
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if (err) {
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dev_err(pfdev->dev, "clk init failed %d\n", err);
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return err;
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}
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err = panfrost_regulator_init(pfdev);
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if (err) {
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dev_err(pfdev->dev, "regulator init failed %d\n", err);
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goto err_out0;
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}
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err = panfrost_reset_init(pfdev);
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if (err) {
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dev_err(pfdev->dev, "reset init failed %d\n", err);
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goto err_out1;
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}
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res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
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pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
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if (IS_ERR(pfdev->iomem)) {
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dev_err(pfdev->dev, "failed to ioremap iomem\n");
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err = PTR_ERR(pfdev->iomem);
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goto err_out2;
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}
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err = panfrost_gpu_init(pfdev);
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if (err)
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goto err_out2;
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err = panfrost_mmu_init(pfdev);
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if (err)
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goto err_out3;
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err = panfrost_job_init(pfdev);
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if (err)
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goto err_out4;
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/* runtime PM will wake us up later */
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panfrost_gpu_power_off(pfdev);
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pm_runtime_set_active(pfdev->dev);
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pm_runtime_get_sync(pfdev->dev);
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pm_runtime_mark_last_busy(pfdev->dev);
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pm_runtime_put_autosuspend(pfdev->dev);
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err = panfrost_perfcnt_init(pfdev);
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if (err)
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goto err_out5;
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return 0;
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err_out5:
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panfrost_job_fini(pfdev);
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err_out4:
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panfrost_mmu_fini(pfdev);
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err_out3:
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panfrost_gpu_fini(pfdev);
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err_out2:
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panfrost_reset_fini(pfdev);
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err_out1:
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panfrost_regulator_fini(pfdev);
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err_out0:
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panfrost_clk_fini(pfdev);
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return err;
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}
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void panfrost_device_fini(struct panfrost_device *pfdev)
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{
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panfrost_perfcnt_fini(pfdev);
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panfrost_job_fini(pfdev);
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panfrost_mmu_fini(pfdev);
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panfrost_gpu_fini(pfdev);
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panfrost_reset_fini(pfdev);
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panfrost_regulator_fini(pfdev);
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panfrost_clk_fini(pfdev);
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}
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const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
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{
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switch (exception_code) {
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/* Non-Fault Status code */
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case 0x00: return "NOT_STARTED/IDLE/OK";
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case 0x01: return "DONE";
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case 0x02: return "INTERRUPTED";
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case 0x03: return "STOPPED";
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case 0x04: return "TERMINATED";
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case 0x08: return "ACTIVE";
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/* Job exceptions */
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case 0x40: return "JOB_CONFIG_FAULT";
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case 0x41: return "JOB_POWER_FAULT";
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case 0x42: return "JOB_READ_FAULT";
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case 0x43: return "JOB_WRITE_FAULT";
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case 0x44: return "JOB_AFFINITY_FAULT";
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case 0x48: return "JOB_BUS_FAULT";
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case 0x50: return "INSTR_INVALID_PC";
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case 0x51: return "INSTR_INVALID_ENC";
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case 0x52: return "INSTR_TYPE_MISMATCH";
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case 0x53: return "INSTR_OPERAND_FAULT";
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case 0x54: return "INSTR_TLS_FAULT";
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case 0x55: return "INSTR_BARRIER_FAULT";
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case 0x56: return "INSTR_ALIGN_FAULT";
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case 0x58: return "DATA_INVALID_FAULT";
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case 0x59: return "TILE_RANGE_FAULT";
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case 0x5A: return "ADDR_RANGE_FAULT";
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case 0x60: return "OUT_OF_MEMORY";
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/* GPU exceptions */
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case 0x80: return "DELAYED_BUS_FAULT";
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case 0x88: return "SHAREABILITY_FAULT";
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/* MMU exceptions */
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case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
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case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
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case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
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case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
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case 0xC8: return "PERMISSION_FAULT";
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case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
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case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
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case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
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case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
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case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
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case 0xD8: return "ACCESS_FLAG";
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case 0xD9 ... 0xDF: return "ACCESS_FLAG";
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case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
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case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
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}
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return "UNKNOWN";
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}
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#ifdef CONFIG_PM
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int panfrost_device_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct panfrost_device *pfdev = platform_get_drvdata(pdev);
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panfrost_gpu_soft_reset(pfdev);
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/* TODO: Re-enable all other address spaces */
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panfrost_gpu_power_on(pfdev);
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panfrost_mmu_enable(pfdev, 0);
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panfrost_job_enable_interrupts(pfdev);
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panfrost_devfreq_resume(pfdev);
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return 0;
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}
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int panfrost_device_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct panfrost_device *pfdev = platform_get_drvdata(pdev);
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if (!panfrost_job_is_idle(pfdev))
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return -EBUSY;
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panfrost_devfreq_suspend(pfdev);
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panfrost_gpu_power_off(pfdev);
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return 0;
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}
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#endif
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