From patchwork Fri Dec 21 13:31:42 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 10740433 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D1CFF13B5 for ; Fri, 21 Dec 2018 13:30:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C20CE28782 for ; Fri, 21 Dec 2018 13:30:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B670E28783; Fri, 21 Dec 2018 13:30:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 63E2D28787 for ; Fri, 21 Dec 2018 13:30:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0A20F6F6B8; Fri, 21 Dec 2018 13:30:43 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 03E096F6B7 for ; Fri, 21 Dec 2018 13:30:38 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Dec 2018 05:30:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,381,1539673200"; d="scan'208";a="131878892" Received: from jnikula-mobl3.fi.intel.com (HELO localhost) ([10.237.72.61]) by fmsmga001.fm.intel.com with ESMTP; 21 Dec 2018 05:30:37 -0800 From: Jani Nikula To: intel-gfx@lists.freedesktop.org Date: Fri, 21 Dec 2018 15:31:42 +0200 Message-Id: X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Subject: [Intel-gfx] [RFC PATCH 07/11] drm/i915/params: add i915 parameters to debugfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Add a debugfs subdirectory i915_params with all the i915 module parameters. This is a first step, with lots of boilerplate, and not much benefit yet. Add debugfs permissions to I915_PARAMS_FOR_EACH(). This duplicates the mode with module parameter sysfs, but the goal is to make the module parameters read-only. 0 mode will bypass debugfs creation. Use it for verbose_state_checks which will need special attention in follow-up work. Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_debugfs.c | 197 ++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_params.c | 2 +- drivers/gpu/drm/i915/i915_params.h | 68 +++++++------ 3 files changed, 233 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index aca26a25ed50..33375cf79713 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -37,6 +37,201 @@ static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node) return to_i915(node->minor->dev); } +/* int param */ +static int i915_param_int_show(struct seq_file *m, void *data) +{ + int *value = m->private; + + seq_printf(m, "%d\n", *value); + + return 0; +} + +static int i915_param_int_open(struct inode *inode, struct file *file) +{ + return single_open(file, i915_param_int_show, inode->i_private); +} + +static ssize_t i915_param_int_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + int *value = m->private; + int ret; + + ret = kstrtoint_from_user(ubuf, len, 0, value); + + return ret ?: len; +} + +static const struct file_operations i915_param_int_fops = { + .owner = THIS_MODULE, + .open = i915_param_int_open, + .read = seq_read, + .write = i915_param_int_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations i915_param_int_fops_ro = { + .owner = THIS_MODULE, + .open = i915_param_int_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +/* unsigned int param */ +static int i915_param_uint_show(struct seq_file *m, void *data) +{ + unsigned int *value = m->private; + + seq_printf(m, "%u\n", *value); + + return 0; +} + +static int i915_param_uint_open(struct inode *inode, struct file *file) +{ + return single_open(file, i915_param_uint_show, inode->i_private); +} + +static ssize_t i915_param_uint_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + unsigned int *value = m->private; + int ret; + + ret = kstrtouint_from_user(ubuf, len, 0, value); + + return ret ?: len; +} + +static const struct file_operations i915_param_uint_fops = { + .owner = THIS_MODULE, + .open = i915_param_uint_open, + .read = seq_read, + .write = i915_param_uint_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations i915_param_uint_fops_ro = { + .owner = THIS_MODULE, + .open = i915_param_uint_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +/* char * param */ +static int i915_param_charp_show(struct seq_file *m, void *data) +{ + const char **s = m->private; + + seq_printf(m, "%s\n", *s); + + return 0; +} + +static int i915_param_charp_open(struct inode *inode, struct file *file) +{ + return single_open(file, i915_param_charp_show, inode->i_private); +} + +static ssize_t i915_param_charp_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + char **s = m->private; + char *new, *old; + + /* FIXME: racy */ + old = *s; + new = strndup_user(ubuf, PAGE_SIZE); + if (IS_ERR(new)) + return PTR_ERR(new); + + *s = new; + + kfree(old); + + return len; +} + +static const struct file_operations i915_param_charp_fops = { + .owner = THIS_MODULE, + .open = i915_param_charp_open, + .read = seq_read, + .write = i915_param_charp_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations i915_param_charp_fops_ro = { + .owner = THIS_MODULE, + .open = i915_param_charp_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +static __always_inline void +_i915_param_create_file(struct dentry *parent, const char *name, + const char *type, int mode, void *value) +{ + bool ro = !(mode & 0222); + + if (!mode) + return; + + if (!__builtin_strcmp(type, "bool")) + debugfs_create_bool(name, mode, parent, value); + else if (!__builtin_strcmp(type, "int")) + debugfs_create_file_unsafe(name, mode, parent, value, + ro ? &i915_param_int_fops_ro : + &i915_param_int_fops); + else if (!__builtin_strcmp(type, "unsigned int")) + debugfs_create_file_unsafe(name, mode, parent, value, + ro ? &i915_param_uint_fops_ro : + &i915_param_uint_fops); + else if (!__builtin_strcmp(type, "char *")) + debugfs_create_file(name, mode, parent, value, + ro ? &i915_param_charp_fops_ro : + &i915_param_charp_fops); + else + WARN(1, "no debugfs fops defined for param type %s (i915.%s)\n", + type, name); +} + +/* add a subdirectory with files for each i915 param */ +static int i915_debugfs_params(struct drm_i915_private *dev_priv) +{ + struct drm_minor *minor = dev_priv->drm.primary; + struct i915_params *params = &i915_modparams; + struct dentry *dir; + + dir = debugfs_create_dir("i915_params", minor->debugfs_root); + if (!dir) + return -ENOMEM; + + /* + * Note: We could create files for params needing special handling + * here. Set mode in params to 0 to skip the generic create file, or + * just let the generic create file fail silently with -EEXIST. + */ + +#define REGISTER(T, x, unused, mode, ...) _i915_param_create_file(dir, #x, #T, mode, ¶ms->x); + I915_PARAMS_FOR_EACH(REGISTER); +#undef REGISTER + + return 0; +} + static int i915_capabilities(struct seq_file *m, void *data) { struct drm_i915_private *dev_priv = node_to_i915(m->private); @@ -4970,6 +5165,8 @@ int i915_debugfs_register(struct drm_i915_private *dev_priv) struct dentry *ent; int i; + i915_debugfs_params(dev_priv); + ent = debugfs_create_file("i915_forcewake_user", S_IRUSR, minor->debugfs_root, to_i915(minor->dev), &i915_forcewake_fops); diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 2853b54570eb..b1a8b8f7dac9 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -35,7 +35,7 @@ MODULE_PARM_DESC(name, desc) struct i915_params i915_modparams __read_mostly = { -#define MEMBER(T, member, value) .member = (value), +#define MEMBER(T, member, value, ...) .member = (value), I915_PARAMS_FOR_EACH(MEMBER) #undef MEMBER }; diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 98eba6728095..30c32e288efe 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -36,46 +36,48 @@ struct drm_printer; /* * Invoke param, a function-like macro, for each i915 param, with arguments: * - * param(type, name, value) + * param(type, name, value, mode) * * type: parameter type, one of {bool, int, unsigned int, char *} * name: name of the parameter * value: initial/default value of the parameter + * mode: debugfs file permissions, one of {0400, 0600, 0}, use 0 to not create + * debugfs file */ #define I915_PARAMS_FOR_EACH(param) \ - param(char *, vbt_firmware, NULL) \ - param(int, modeset, -1) \ - param(int, lvds_channel_mode, 0) \ - param(int, panel_use_ssc, -1) \ - param(int, vbt_sdvo_panel_type, -1) \ - param(int, enable_dc, -1) \ - param(int, enable_fbc, -1) \ - param(int, enable_psr, -1) \ - param(int, disable_power_well, -1) \ - param(int, enable_ips, 1) \ - param(int, invert_brightness, 0) \ - param(int, enable_guc, 0) \ - param(int, guc_log_level, -1) \ - param(char *, guc_firmware_path, NULL) \ - param(char *, huc_firmware_path, NULL) \ - param(char *, dmc_firmware_path, NULL) \ - param(int, mmio_debug, 0) \ - param(int, edp_vswing, 0) \ - param(int, reset, 2) \ + param(char *, vbt_firmware, NULL, 0400) \ + param(int, modeset, -1, 0400) \ + param(int, lvds_channel_mode, 0, 0400) \ + param(int, panel_use_ssc, -1, 0600) \ + param(int, vbt_sdvo_panel_type, -1, 0400) \ + param(int, enable_dc, -1, 0400) \ + param(int, enable_fbc, -1, 0600) \ + param(int, enable_psr, -1, 0600) \ + param(int, disable_power_well, -1, 0400) \ + param(int, enable_ips, 1, 0600) \ + param(int, invert_brightness, 0, 0600) \ + param(int, enable_guc, 0, 0400) \ + param(int, guc_log_level, -1, 0400) \ + param(char *, guc_firmware_path, NULL, 0400) \ + param(char *, huc_firmware_path, NULL, 0400) \ + param(char *, dmc_firmware_path, NULL, 0400) \ + param(int, mmio_debug, 0, 0600) \ + param(int, edp_vswing, 0, 0400) \ + param(int, reset, 2, 0600) \ /* leave bools at the end to not create holes */ \ - param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \ - param(bool, enable_hangcheck, true) \ - param(bool, fastboot, false) \ - param(bool, prefault_disable, false) \ - param(bool, load_detect_test, false) \ - param(bool, force_reset_modeset_test, false) \ - param(bool, error_capture, true) \ - param(bool, disable_display, false) \ - param(bool, verbose_state_checks, true) \ - param(bool, nuclear_pageflip, false) \ - param(bool, enable_dp_mst, true) \ - param(bool, enable_dpcd_backlight, false) \ - param(bool, enable_gvt, false) + param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT), 0400) \ + param(bool, enable_hangcheck, true, 0600) \ + param(bool, fastboot, false, 0600) \ + param(bool, prefault_disable, false, 0600) \ + param(bool, load_detect_test, false, 0600) \ + param(bool, force_reset_modeset_test, false, 0600) \ + param(bool, error_capture, true, 0600) \ + param(bool, disable_display, false, 0400) \ + param(bool, verbose_state_checks, true, 0) \ + param(bool, nuclear_pageflip, false, 0400) \ + param(bool, enable_dp_mst, true, 0600) \ + param(bool, enable_dpcd_backlight, false, 0600) \ + param(bool, enable_gvt, false, 0400) #define MEMBER(T, member, ...) T member; struct i915_params {