From 26487b82df0c6604cc40fd6480f7ad7ed4e3efb0 Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Thu, 1 Jun 2017 13:32:09 +0530 Subject: gpu: nvgpu: move clk_gm20b debugfs to Linux module Move debugfs code from clk_gm20b.c to file in Linux module common/linux/debug_clk.c This file will be compiled only if CONFIG_DEBUG_FS is set Define below new HAL APIs for various clock operations which can be accessed from debug file init_debugfs() get_voltage() get_gpcclk_clock_counter() pll_reg_write() get_pll_debug_data() Export nvgpu_pl_to_div() and nvgpu_div_to_pl() so that these can be accessed from debug_clk.c Add new structure nvgpu_clk_pll_debug_data so that all required register values for debugging can be made available in debug_clk.c Add new API gm20b_get_gpc_pll_parms() so that statically defined variable can be accessed in debug_clk.c too Remove global variable dvfs_safe_max_freq and add it to struct clk_gk20a so that it can accessed from both clk_gm20b.c and debug_clk.c Jira NVGPU-62 Change-Id: I3ae70b40235e78141a686686930e1f178ad59453 Signed-off-by: Deepak Nibade Reviewed-on: http://git-master/r/1488903 GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom --- drivers/gpu/nvgpu/common/linux/debug_clk.c | 271 +++++++++++++++++++++++++++++ 1 file changed, 271 insertions(+) create mode 100644 drivers/gpu/nvgpu/common/linux/debug_clk.c (limited to 'drivers/gpu/nvgpu/common') diff --git a/drivers/gpu/nvgpu/common/linux/debug_clk.c b/drivers/gpu/nvgpu/common/linux/debug_clk.c new file mode 100644 index 00000000..9dfa2d77 --- /dev/null +++ b/drivers/gpu/nvgpu/common/linux/debug_clk.c @@ -0,0 +1,271 @@ +/* + * Copyright (C) 2017 NVIDIA Corporation. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include + +#include "gk20a/platform_gk20a.h" +#include "gm20b/clk_gm20b.h" + +static int rate_get(void *data, u64 *val) +{ + struct gk20a *g = (struct gk20a *)data; + struct clk_gk20a *clk = &g->clk; + + *val = (u64)rate_gpc2clk_to_gpu(clk->gpc_pll.freq); + return 0; +} +static int rate_set(void *data, u64 val) +{ + struct gk20a *g = (struct gk20a *)data; + return g->ops.clk.set_rate(g, CTRL_CLK_DOMAIN_GPCCLK, (u32)val); +} +DEFINE_SIMPLE_ATTRIBUTE(rate_fops, rate_get, rate_set, "%llu\n"); + +static int pll_reg_show(struct seq_file *s, void *data) +{ + struct gk20a *g = s->private; + struct nvgpu_clk_pll_debug_data d; + u32 reg, m, n, pl, f; + int err = 0; + + if (g->ops.clk.get_pll_debug_data) { + err = g->ops.clk.get_pll_debug_data(g, &d); + if (err) + return err; + } else { + return -EINVAL; + } + + seq_printf(s, "bypassctrl = %s, ", + d.trim_sys_bypassctrl_val ? "bypass" : "vco"); + seq_printf(s, "sel_vco = %s, ", + d.trim_sys_sel_vco_val ? "vco" : "bypass"); + + seq_printf(s, "cfg = 0x%x : %s : %s : %s\n", d.trim_sys_gpcpll_cfg_val, + d.trim_sys_gpcpll_cfg_enabled ? "enabled" : "disabled", + d.trim_sys_gpcpll_cfg_locked ? "locked" : "unlocked", + d.trim_sys_gpcpll_cfg_sync_on ? "sync_on" : "sync_off"); + + reg = d.trim_sys_gpcpll_coeff_val; + m = d.trim_sys_gpcpll_coeff_mdiv; + n = d.trim_sys_gpcpll_coeff_ndiv; + pl = d.trim_sys_gpcpll_coeff_pldiv; + f = g->clk.gpc_pll.clk_in * n / (m * nvgpu_pl_to_div(pl)); + seq_printf(s, "coef = 0x%x : m = %u : n = %u : pl = %u", reg, m, n, pl); + seq_printf(s, " : pll_f(gpu_f) = %u(%u) kHz\n", f, f/2); + + seq_printf(s, "dvfs0 = 0x%x : d = %u : dmax = %u : doffs = %u\n", + d.trim_sys_gpcpll_dvfs0_val, + d.trim_sys_gpcpll_dvfs0_dfs_coeff, + d.trim_sys_gpcpll_dvfs0_dfs_det_max, + d.trim_sys_gpcpll_dvfs0_dfs_dc_offset); + + return 0; +} + +static int pll_reg_open(struct inode *inode, struct file *file) +{ + return single_open(file, pll_reg_show, inode->i_private); +} + +static const struct file_operations pll_reg_fops = { + .open = pll_reg_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int pll_reg_raw_show(struct seq_file *s, void *data) +{ + struct gk20a *g = s->private; + struct nvgpu_clk_pll_debug_data d; + u32 reg; + int err = 0; + + if (g->ops.clk.get_pll_debug_data) { + err = g->ops.clk.get_pll_debug_data(g, &d); + if (err) + return err; + } else { + return -EINVAL; + } + + seq_puts(s, "GPCPLL REGISTERS:\n"); + for (reg = d.trim_sys_gpcpll_cfg_reg; + reg <= d.trim_sys_gpcpll_dvfs2_reg; + reg += sizeof(u32)) + seq_printf(s, "[0x%02x] = 0x%08x\n", reg, gk20a_readl(g, reg)); + + seq_puts(s, "\nGPC CLK OUT REGISTERS:\n"); + + seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_sel_vco_reg, + d.trim_sys_sel_vco_val); + seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_gpc2clk_out_reg, + d.trim_sys_gpc2clk_out_val); + seq_printf(s, "[0x%02x] = 0x%08x\n", d.trim_sys_bypassctrl_reg, + d.trim_sys_bypassctrl_val); + + return 0; +} + +static int pll_reg_raw_open(struct inode *inode, struct file *file) +{ + return single_open(file, pll_reg_raw_show, inode->i_private); +} + +static ssize_t pll_reg_raw_write(struct file *file, + const char __user *userbuf, size_t count, loff_t *ppos) +{ + struct gk20a *g = file->f_path.dentry->d_inode->i_private; + char buf[80]; + u32 reg, val; + int err = 0; + + if (sizeof(buf) <= count) + return -EINVAL; + + if (copy_from_user(buf, userbuf, count)) + return -EFAULT; + + /* terminate buffer and trim - white spaces may be appended + * at the end when invoked from shell command line */ + buf[count] = '\0'; + strim(buf); + + if (sscanf(buf, "[0x%x] = 0x%x", ®, &val) != 2) + return -EINVAL; + + if (g->ops.clk.pll_reg_write(g, reg, val)) + err = g->ops.clk.pll_reg_write(g, reg, val); + else + err = -EINVAL; + + return err; +} + +static const struct file_operations pll_reg_raw_fops = { + .open = pll_reg_raw_open, + .read = seq_read, + .write = pll_reg_raw_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static int monitor_get(void *data, u64 *val) +{ + struct gk20a *g = (struct gk20a *)data; + int err = 0; + + if (g->ops.clk.get_gpcclk_clock_counter) + err = g->ops.clk.get_gpcclk_clock_counter(&g->clk, val); + else + err = -EINVAL; + + return err; +} +DEFINE_SIMPLE_ATTRIBUTE(monitor_fops, monitor_get, NULL, "%llu\n"); + +static int voltage_get(void *data, u64 *val) +{ + struct gk20a *g = (struct gk20a *)data; + int err = 0; + + if (g->ops.clk.get_voltage) + err = g->ops.clk.get_voltage(&g->clk, val); + else + err = -EINVAL; + + return err; +} +DEFINE_SIMPLE_ATTRIBUTE(voltage_fops, voltage_get, NULL, "%llu\n"); + +static int pll_param_show(struct seq_file *s, void *data) +{ + struct pll_parms *gpc_pll_params = gm20b_get_gpc_pll_parms(); + + seq_printf(s, "ADC offs = %d uV, ADC slope = %d uV, VCO ctrl = 0x%x\n", + gpc_pll_params->uvdet_offs, gpc_pll_params->uvdet_slope, + gpc_pll_params->vco_ctrl); + return 0; +} + +static int pll_param_open(struct inode *inode, struct file *file) +{ + return single_open(file, pll_param_show, inode->i_private); +} + +static const struct file_operations pll_param_fops = { + .open = pll_param_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +int gm20b_clk_init_debugfs(struct gk20a *g) +{ + struct dentry *d; + struct gk20a_platform *platform = dev_get_drvdata(g->dev); + + if (!platform->debugfs) + return -EINVAL; + + d = debugfs_create_file( + "rate", S_IRUGO|S_IWUSR, platform->debugfs, g, &rate_fops); + if (!d) + goto err_out; + + d = debugfs_create_file( + "pll_reg", S_IRUGO, platform->debugfs, g, &pll_reg_fops); + if (!d) + goto err_out; + + d = debugfs_create_file("pll_reg_raw", + S_IRUGO, platform->debugfs, g, &pll_reg_raw_fops); + if (!d) + goto err_out; + + d = debugfs_create_file( + "monitor", S_IRUGO, platform->debugfs, g, &monitor_fops); + if (!d) + goto err_out; + + d = debugfs_create_file( + "voltage", S_IRUGO, platform->debugfs, g, &voltage_fops); + if (!d) + goto err_out; + + d = debugfs_create_file( + "pll_param", S_IRUGO, platform->debugfs, g, &pll_param_fops); + if (!d) + goto err_out; + + d = debugfs_create_u32("pll_na_mode", S_IRUGO, platform->debugfs, + (u32 *)&g->clk.gpc_pll.mode); + if (!d) + goto err_out; + + d = debugfs_create_u32("fmax2x_at_vmin_safe_t", S_IRUGO, + platform->debugfs, (u32 *)&g->clk.dvfs_safe_max_freq); + if (!d) + goto err_out; + + return 0; + +err_out: + pr_err("%s: Failed to make debugfs node\n", __func__); + debugfs_remove_recursive(platform->debugfs); + return -ENOMEM; +} -- cgit v1.2.2