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authorGuenter Roeck <linux@roeck-us.net>2020-01-22 06:33:54 +0100
committerGuenter Roeck <linux@roeck-us.net>2020-01-23 22:15:11 +0100
commit9c4a38f19ed2bda2df2765e98ed661daf61b2cb2 (patch)
tree77707f809b6f3546f6c0c39aed2bb4adff442882 /drivers/hwmon
parenthwmon: (k10temp) Don't show temperature limits on Ryzen (Zen) CPUs (diff)
downloadlinux-9c4a38f19ed2bda2df2765e98ed661daf61b2cb2.tar.xz
linux-9c4a38f19ed2bda2df2765e98ed661daf61b2cb2.zip
hwmon: (k10temp) Add debugfs support
Show thermal and SVI registers for Family 17h CPUs. Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/k10temp.c78
1 files changed, 77 insertions, 1 deletions
diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index 4a470b5195ee..5e3f43594084 100644
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -26,6 +26,7 @@
*/
#include <linux/bitops.h>
+#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/hwmon.h>
#include <linux/init.h>
@@ -442,6 +443,76 @@ static bool has_erratum_319(struct pci_dev *pdev)
(boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2);
}
+#ifdef CONFIG_DEBUG_FS
+
+static void k10temp_smn_regs_show(struct seq_file *s, struct pci_dev *pdev,
+ u32 addr, int count)
+{
+ u32 reg;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (!(i & 3))
+ seq_printf(s, "0x%06x: ", addr + i * 4);
+ amd_smn_read(amd_pci_dev_to_node_id(pdev), addr + i * 4, &reg);
+ seq_printf(s, "%08x ", reg);
+ if ((i & 3) == 3)
+ seq_puts(s, "\n");
+ }
+}
+
+static int svi_show(struct seq_file *s, void *unused)
+{
+ struct k10temp_data *data = s->private;
+
+ k10temp_smn_regs_show(s, data->pdev, F17H_M01H_SVI, 32);
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(svi);
+
+static int thm_show(struct seq_file *s, void *unused)
+{
+ struct k10temp_data *data = s->private;
+
+ k10temp_smn_regs_show(s, data->pdev,
+ F17H_M01H_REPORTED_TEMP_CTRL_OFFSET, 256);
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(thm);
+
+static void k10temp_debugfs_cleanup(void *ddir)
+{
+ debugfs_remove_recursive(ddir);
+}
+
+static void k10temp_init_debugfs(struct k10temp_data *data)
+{
+ struct dentry *debugfs;
+ char name[32];
+
+ /* Only show debugfs data for Family 17h/18h CPUs */
+ if (!data->show_tdie)
+ return;
+
+ scnprintf(name, sizeof(name), "k10temp-%s", pci_name(data->pdev));
+
+ debugfs = debugfs_create_dir(name, NULL);
+ if (debugfs) {
+ debugfs_create_file("svi", 0444, debugfs, data, &svi_fops);
+ debugfs_create_file("thm", 0444, debugfs, data, &thm_fops);
+ devm_add_action_or_reset(&data->pdev->dev,
+ k10temp_debugfs_cleanup, debugfs);
+ }
+}
+
+#else
+
+static void k10temp_init_debugfs(struct k10temp_data *data)
+{
+}
+
+#endif
+
static const struct hwmon_channel_info *k10temp_info[] = {
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT | HWMON_T_MAX |
@@ -553,7 +624,12 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
hwmon_dev = devm_hwmon_device_register_with_info(dev, "k10temp", data,
&k10temp_chip_info,
NULL);
- return PTR_ERR_OR_ZERO(hwmon_dev);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ k10temp_init_debugfs(data);
+
+ return 0;
}
static const struct pci_device_id k10temp_id_table[] = {