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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/i915/i915_sysfs.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_sysfs.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_sysfs.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c new file mode 100644 index 0000000000..e88bb4f043 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -0,0 +1,273 @@ +/* + * Copyright © 2012 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: + * Ben Widawsky <ben@bwidawsk.net> + * + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/stat.h> +#include <linux/sysfs.h> + +#include "gt/intel_gt_regs.h" +#include "gt/intel_rc6.h" +#include "gt/intel_rps.h" +#include "gt/sysfs_engines.h" + +#include "i915_drv.h" +#include "i915_sysfs.h" + +struct drm_i915_private *kdev_minor_to_i915(struct device *kdev) +{ + struct drm_minor *minor = dev_get_drvdata(kdev); + return to_i915(minor->dev); +} + +static int l3_access_valid(struct drm_i915_private *i915, loff_t offset) +{ + if (!HAS_L3_DPF(i915)) + return -EPERM; + + if (!IS_ALIGNED(offset, sizeof(u32))) + return -EINVAL; + + if (offset >= GEN7_L3LOG_SIZE) + return -ENXIO; + + return 0; +} + +static ssize_t +i915_l3_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t offset, size_t count) +{ + struct device *kdev = kobj_to_dev(kobj); + struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); + int slice = (int)(uintptr_t)attr->private; + int ret; + + ret = l3_access_valid(i915, offset); + if (ret) + return ret; + + count = round_down(count, sizeof(u32)); + count = min_t(size_t, GEN7_L3LOG_SIZE - offset, count); + memset(buf, 0, count); + + spin_lock(&i915->gem.contexts.lock); + if (i915->l3_parity.remap_info[slice]) + memcpy(buf, + i915->l3_parity.remap_info[slice] + offset / sizeof(u32), + count); + spin_unlock(&i915->gem.contexts.lock); + + return count; +} + +static ssize_t +i915_l3_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t offset, size_t count) +{ + struct device *kdev = kobj_to_dev(kobj); + struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); + int slice = (int)(uintptr_t)attr->private; + u32 *remap_info, *freeme = NULL; + struct i915_gem_context *ctx; + int ret; + + ret = l3_access_valid(i915, offset); + if (ret) + return ret; + + if (count < sizeof(u32)) + return -EINVAL; + + remap_info = kzalloc(GEN7_L3LOG_SIZE, GFP_KERNEL); + if (!remap_info) + return -ENOMEM; + + spin_lock(&i915->gem.contexts.lock); + + if (i915->l3_parity.remap_info[slice]) { + freeme = remap_info; + remap_info = i915->l3_parity.remap_info[slice]; + } else { + i915->l3_parity.remap_info[slice] = remap_info; + } + + count = round_down(count, sizeof(u32)); + memcpy(remap_info + offset / sizeof(u32), buf, count); + + /* NB: We defer the remapping until we switch to the context */ + list_for_each_entry(ctx, &i915->gem.contexts.list, link) + ctx->remap_slice |= BIT(slice); + + spin_unlock(&i915->gem.contexts.lock); + kfree(freeme); + + /* + * TODO: Ideally we really want a GPU reset here to make sure errors + * aren't propagated. Since I cannot find a stable way to reset the GPU + * at this point it is left as a TODO. + */ + + return count; +} + +static const struct bin_attribute dpf_attrs = { + .attr = {.name = "l3_parity", .mode = (S_IRUSR | S_IWUSR)}, + .size = GEN7_L3LOG_SIZE, + .read = i915_l3_read, + .write = i915_l3_write, + .mmap = NULL, + .private = (void *)0 +}; + +static const struct bin_attribute dpf_attrs_1 = { + .attr = {.name = "l3_parity_slice_1", .mode = (S_IRUSR | S_IWUSR)}, + .size = GEN7_L3LOG_SIZE, + .read = i915_l3_read, + .write = i915_l3_write, + .mmap = NULL, + .private = (void *)1 +}; + +#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) + +static ssize_t error_state_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + + struct device *kdev = kobj_to_dev(kobj); + struct drm_i915_private *i915 = kdev_minor_to_i915(kdev); + struct i915_gpu_coredump *gpu; + ssize_t ret = 0; + + /* + * FIXME: Concurrent clients triggering resets and reading + clearing + * dumps can cause inconsistent sysfs reads when a user calls in with a + * non-zero offset to complete a prior partial read but the + * gpu_coredump has been cleared or replaced. + */ + + gpu = i915_first_error_state(i915); + if (IS_ERR(gpu)) { + ret = PTR_ERR(gpu); + } else if (gpu) { + ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count); + i915_gpu_coredump_put(gpu); + } else { + const char *str = "No error state collected\n"; + size_t len = strlen(str); + + if (off < len) { + ret = min_t(size_t, count, len - off); + memcpy(buf, str + off, ret); + } + } + + return ret; +} + +static ssize_t error_state_write(struct file *file, struct kobject *kobj, + struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + struct device *kdev = kobj_to_dev(kobj); + struct drm_i915_private *dev_priv = kdev_minor_to_i915(kdev); + + drm_dbg(&dev_priv->drm, "Resetting error state\n"); + i915_reset_error_state(dev_priv); + + return count; +} + +static const struct bin_attribute error_state_attr = { + .attr.name = "error", + .attr.mode = S_IRUSR | S_IWUSR, + .size = 0, + .read = error_state_read, + .write = error_state_write, +}; + +static void i915_setup_error_capture(struct device *kdev) +{ + if (sysfs_create_bin_file(&kdev->kobj, &error_state_attr)) + drm_err(&kdev_minor_to_i915(kdev)->drm, + "error_state sysfs setup failed\n"); +} + +static void i915_teardown_error_capture(struct device *kdev) +{ + sysfs_remove_bin_file(&kdev->kobj, &error_state_attr); +} +#else +static void i915_setup_error_capture(struct device *kdev) {} +static void i915_teardown_error_capture(struct device *kdev) {} +#endif + +void i915_setup_sysfs(struct drm_i915_private *dev_priv) +{ + struct device *kdev = dev_priv->drm.primary->kdev; + int ret; + + if (HAS_L3_DPF(dev_priv)) { + ret = device_create_bin_file(kdev, &dpf_attrs); + if (ret) + drm_err(&dev_priv->drm, + "l3 parity sysfs setup failed\n"); + + if (NUM_L3_SLICES(dev_priv) > 1) { + ret = device_create_bin_file(kdev, + &dpf_attrs_1); + if (ret) + drm_err(&dev_priv->drm, + "l3 parity slice 1 setup failed\n"); + } + } + + dev_priv->sysfs_gt = kobject_create_and_add("gt", &kdev->kobj); + if (!dev_priv->sysfs_gt) + drm_warn(&dev_priv->drm, + "failed to register GT sysfs directory\n"); + + i915_setup_error_capture(kdev); + + intel_engines_add_sysfs(dev_priv); +} + +void i915_teardown_sysfs(struct drm_i915_private *dev_priv) +{ + struct device *kdev = dev_priv->drm.primary->kdev; + + i915_teardown_error_capture(kdev); + + device_remove_bin_file(kdev, &dpf_attrs_1); + device_remove_bin_file(kdev, &dpf_attrs); + + kobject_put(dev_priv->sysfs_gt); +} |