diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_gt_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_gt_debugfs.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_gt_debugfs.c b/drivers/gpu/drm/xe/xe_gt_debugfs.c new file mode 100644 index 000000000000..e4fd632f43cf --- /dev/null +++ b/drivers/gpu/drm/xe/xe_gt_debugfs.c @@ -0,0 +1,379 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2022 Intel Corporation + */ + +#include "xe_gt_debugfs.h" + +#include <linux/debugfs.h> + +#include <drm/drm_debugfs.h> +#include <drm/drm_managed.h> + +#include "xe_device.h" +#include "xe_force_wake.h" +#include "xe_gt.h" +#include "xe_gt_mcr.h" +#include "xe_gt_idle.h" +#include "xe_gt_sriov_pf_debugfs.h" +#include "xe_gt_sriov_vf_debugfs.h" +#include "xe_gt_stats.h" +#include "xe_gt_topology.h" +#include "xe_guc_hwconfig.h" +#include "xe_hw_engine.h" +#include "xe_lrc.h" +#include "xe_macros.h" +#include "xe_mocs.h" +#include "xe_pat.h" +#include "xe_pm.h" +#include "xe_reg_sr.h" +#include "xe_reg_whitelist.h" +#include "xe_sa.h" +#include "xe_sriov.h" +#include "xe_sriov_vf_ccs.h" +#include "xe_tuning.h" +#include "xe_uc_debugfs.h" +#include "xe_wa.h" + +static struct xe_gt *node_to_gt(struct drm_info_node *node) +{ + return node->dent->d_parent->d_inode->i_private; +} + +/** + * xe_gt_debugfs_simple_show - A show callback for struct drm_info_list + * @m: the &seq_file + * @data: data used by the drm debugfs helpers + * + * This callback can be used in struct drm_info_list to describe debugfs + * files that are &xe_gt specific. + * + * It is assumed that those debugfs files will be created on directory entry + * which struct dentry d_inode->i_private points to &xe_gt. + * + * This function assumes that &m->private will be set to the &struct + * drm_info_node corresponding to the instance of the info on a given &struct + * drm_minor (see struct drm_info_list.show for details). + * + * This function also assumes that struct drm_info_list.data will point to the + * function code that will actually print a file content:: + * + * int (*print)(struct xe_gt *, struct drm_printer *) + * + * Example:: + * + * int foo(struct xe_gt *gt, struct drm_printer *p) + * { + * drm_printf(p, "GT%u\n", gt->info.id); + * return 0; + * } + * + * static const struct drm_info_list bar[] = { + * { name = "foo", .show = xe_gt_debugfs_simple_show, .data = foo }, + * }; + * + * dir = debugfs_create_dir("gt", parent); + * dir->d_inode->i_private = gt; + * drm_debugfs_create_files(bar, ARRAY_SIZE(bar), dir, minor); + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_debugfs_simple_show(struct seq_file *m, void *data) +{ + struct drm_printer p = drm_seq_file_printer(m); + struct drm_info_node *node = m->private; + struct xe_gt *gt = node_to_gt(node); + int (*print)(struct xe_gt *, struct drm_printer *) = node->info_ent->data; + + if (WARN_ON(!print)) + return -EINVAL; + + return print(gt, &p); +} + +/** + * xe_gt_debugfs_show_with_rpm - A show callback for struct drm_info_list + * @m: the &seq_file + * @data: data used by the drm debugfs helpers + * + * Similar to xe_gt_debugfs_simple_show() but implicitly takes a RPM ref. + * + * Return: 0 on success or a negative error code on failure. + */ +int xe_gt_debugfs_show_with_rpm(struct seq_file *m, void *data) +{ + struct drm_info_node *node = m->private; + struct xe_gt *gt = node_to_gt(node); + struct xe_device *xe = gt_to_xe(gt); + int ret; + + xe_pm_runtime_get(xe); + ret = xe_gt_debugfs_simple_show(m, data); + xe_pm_runtime_put(xe); + + return ret; +} + +static int hw_engines(struct xe_gt *gt, struct drm_printer *p) +{ + struct xe_hw_engine *hwe; + enum xe_hw_engine_id id; + unsigned int fw_ref; + int ret = 0; + + fw_ref = xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL); + if (!xe_force_wake_ref_has_domain(fw_ref, XE_FORCEWAKE_ALL)) { + ret = -ETIMEDOUT; + goto fw_put; + } + + for_each_hw_engine(hwe, gt, id) + xe_hw_engine_print(hwe, p); + +fw_put: + xe_force_wake_put(gt_to_fw(gt), fw_ref); + + return ret; +} + +static int steering(struct xe_gt *gt, struct drm_printer *p) +{ + xe_gt_mcr_steering_dump(gt, p); + return 0; +} + +static int register_save_restore(struct xe_gt *gt, struct drm_printer *p) +{ + struct xe_hw_engine *hwe; + enum xe_hw_engine_id id; + + xe_reg_sr_dump(>->reg_sr, p); + drm_printf(p, "\n"); + + drm_printf(p, "Engine\n"); + for_each_hw_engine(hwe, gt, id) + xe_reg_sr_dump(&hwe->reg_sr, p); + drm_printf(p, "\n"); + + drm_printf(p, "LRC\n"); + for_each_hw_engine(hwe, gt, id) + xe_reg_sr_dump(&hwe->reg_lrc, p); + drm_printf(p, "\n"); + + drm_printf(p, "Whitelist\n"); + for_each_hw_engine(hwe, gt, id) + xe_reg_whitelist_dump(&hwe->reg_whitelist, p); + + return 0; +} + +static int rcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) +{ + xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_RENDER); + return 0; +} + +static int ccs_default_lrc(struct xe_gt *gt, struct drm_printer *p) +{ + xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_COMPUTE); + return 0; +} + +static int bcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) +{ + xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_COPY); + return 0; +} + +static int vcs_default_lrc(struct xe_gt *gt, struct drm_printer *p) +{ + xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_VIDEO_DECODE); + return 0; +} + +static int vecs_default_lrc(struct xe_gt *gt, struct drm_printer *p) +{ + xe_lrc_dump_default(p, gt, XE_ENGINE_CLASS_VIDEO_ENHANCE); + return 0; +} + +static int hwconfig(struct xe_gt *gt, struct drm_printer *p) +{ + xe_guc_hwconfig_dump(>->uc.guc, p); + return 0; +} + +/* + * only for GT debugfs files which can be safely used on the VF as well: + * - without access to the GT privileged registers + * - without access to the PF specific data + */ +static const struct drm_info_list vf_safe_debugfs_list[] = { + { "topology", .show = xe_gt_debugfs_show_with_rpm, .data = xe_gt_topology_dump }, + { "register-save-restore", + .show = xe_gt_debugfs_show_with_rpm, .data = register_save_restore }, + { "workarounds", .show = xe_gt_debugfs_show_with_rpm, .data = xe_wa_gt_dump }, + { "tunings", .show = xe_gt_debugfs_show_with_rpm, .data = xe_tuning_dump }, + { "default_lrc_rcs", .show = xe_gt_debugfs_show_with_rpm, .data = rcs_default_lrc }, + { "default_lrc_ccs", .show = xe_gt_debugfs_show_with_rpm, .data = ccs_default_lrc }, + { "default_lrc_bcs", .show = xe_gt_debugfs_show_with_rpm, .data = bcs_default_lrc }, + { "default_lrc_vcs", .show = xe_gt_debugfs_show_with_rpm, .data = vcs_default_lrc }, + { "default_lrc_vecs", .show = xe_gt_debugfs_show_with_rpm, .data = vecs_default_lrc }, + { "hwconfig", .show = xe_gt_debugfs_show_with_rpm, .data = hwconfig }, +}; + +/* everything else should be added here */ +static const struct drm_info_list pf_only_debugfs_list[] = { + { "hw_engines", .show = xe_gt_debugfs_show_with_rpm, .data = hw_engines }, + { "mocs", .show = xe_gt_debugfs_show_with_rpm, .data = xe_mocs_dump }, + { "pat", .show = xe_gt_debugfs_show_with_rpm, .data = xe_pat_dump }, + { "powergate_info", .show = xe_gt_debugfs_show_with_rpm, .data = xe_gt_idle_pg_print }, + { "steering", .show = xe_gt_debugfs_show_with_rpm, .data = steering }, +}; + +static ssize_t write_to_gt_call(const char __user *userbuf, size_t count, loff_t *ppos, + void (*call)(struct xe_gt *), struct xe_gt *gt) +{ + bool yes; + int ret; + + if (*ppos) + return -EINVAL; + ret = kstrtobool_from_user(userbuf, count, &yes); + if (ret < 0) + return ret; + if (yes) + call(gt); + return count; +} + +static ssize_t stats_write(struct file *file, const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xe_gt *gt = s->private; + + return write_to_gt_call(userbuf, count, ppos, xe_gt_stats_clear, gt); +} + +static int stats_show(struct seq_file *s, void *unused) +{ + struct drm_printer p = drm_seq_file_printer(s); + struct xe_gt *gt = s->private; + + return xe_gt_stats_print_info(gt, &p); +} +DEFINE_SHOW_STORE_ATTRIBUTE(stats); + +static void force_reset(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + + xe_pm_runtime_get(xe); + xe_gt_reset_async(gt); + xe_pm_runtime_put(xe); +} + +static ssize_t force_reset_write(struct file *file, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xe_gt *gt = s->private; + + return write_to_gt_call(userbuf, count, ppos, force_reset, gt); +} + +static int force_reset_show(struct seq_file *s, void *unused) +{ + struct xe_gt *gt = s->private; + + force_reset(gt); /* to be deprecated! */ + return 0; +} +DEFINE_SHOW_STORE_ATTRIBUTE(force_reset); + +static void force_reset_sync(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + + xe_pm_runtime_get(xe); + xe_gt_reset(gt); + xe_pm_runtime_put(xe); +} + +static ssize_t force_reset_sync_write(struct file *file, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct xe_gt *gt = s->private; + + return write_to_gt_call(userbuf, count, ppos, force_reset_sync, gt); +} + +static int force_reset_sync_show(struct seq_file *s, void *unused) +{ + struct xe_gt *gt = s->private; + + force_reset_sync(gt); /* to be deprecated! */ + return 0; +} +DEFINE_SHOW_STORE_ATTRIBUTE(force_reset_sync); + +void xe_gt_debugfs_register(struct xe_gt *gt) +{ + struct xe_device *xe = gt_to_xe(gt); + struct drm_minor *minor = gt_to_xe(gt)->drm.primary; + struct dentry *parent = gt->tile->debugfs; + struct dentry *root; + char symlink[16]; + char name[8]; + + xe_gt_assert(gt, minor->debugfs_root); + + if (IS_ERR(parent)) + return; + + snprintf(name, sizeof(name), "gt%d", gt->info.id); + root = debugfs_create_dir(name, parent); + if (IS_ERR(root)) { + drm_warn(&xe->drm, "Create GT directory failed"); + return; + } + + /* + * Store the xe_gt pointer as private data of the gt/ directory node + * so other GT specific attributes under that directory may refer to + * it by looking at its parent node private data. + */ + root->d_inode->i_private = gt; + + /* VF safe */ + debugfs_create_file("stats", 0600, root, gt, &stats_fops); + debugfs_create_file("force_reset", 0600, root, gt, &force_reset_fops); + debugfs_create_file("force_reset_sync", 0600, root, gt, &force_reset_sync_fops); + + drm_debugfs_create_files(vf_safe_debugfs_list, + ARRAY_SIZE(vf_safe_debugfs_list), + root, minor); + + if (!IS_SRIOV_VF(xe)) + drm_debugfs_create_files(pf_only_debugfs_list, + ARRAY_SIZE(pf_only_debugfs_list), + root, minor); + + xe_uc_debugfs_register(>->uc, root); + + if (IS_SRIOV_PF(xe)) + xe_gt_sriov_pf_debugfs_register(gt, root); + else if (IS_SRIOV_VF(xe)) + xe_gt_sriov_vf_debugfs_register(gt, root); + + /* + * Backwards compatibility only: create a link for the legacy clients + * who may expect gt/ directory at the root level, not the tile level. + */ + snprintf(symlink, sizeof(symlink), "tile%u/%s", gt->tile->id, name); + debugfs_create_symlink(name, minor->debugfs_root, symlink); +} |