hwmon: (k10temp) Add support for F15h M60h

This patch adds temperature monitoring support for F15h M60h processor.
 - Add new pci device id for the relevant processor
 - The functionality of REG_REPORTED_TEMPERATURE is moved to
   D0F0xBC_xD820_0CA4 [Reported Temperature Control]
   - So, use this to get CUR_TEMP value
   - Since we need an indirect register access, protect this with
     a mutex lock
 - Add Kconfig, Doc entries to indicate support for this processor.

Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Acked-by: Borislav Petkov <bp@suse.de>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
[Guenter Roeck: Declare new mutex and function static]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/hwmon/k10temp b/Documentation/hwmon/k10temp
index ee6d30e..254d2f5 100644 (file)
--- a/Documentation/hwmon/k10temp
+++ b/Documentation/hwmon/k10temp
@@ -11,7 +11,7 @@ Supported chips:
   Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
 * AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series)
 * AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
-* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri"
+* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri", "Carrizo"
 * AMD Family 16h processors: "Kabini", "Mullins"
 
   Prefix: 'k10temp'

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f00d048..4289a4f 100644 (file)
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -280,8 +280,8 @@ config SENSORS_K10TEMP
          If you say yes here you get support for the temperature
          sensor(s) inside your CPU. Supported are later revisions of
          the AMD Family 10h and all revisions of the AMD Family 11h,
-         12h (Llano), 14h (Brazos), 15h (Bulldozer/Trinity/Kaveri) and
-         16h (Kabini/Mullins) microarchitectures.
+         12h (Llano), 14h (Brazos), 15h (Bulldozer/Trinity/Kaveri/Carrizo)
+         and 16h (Kabini/Mullins) microarchitectures.
 
          This driver can also be built as a module.  If so, the module
          will be called k10temp.

diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c
index f7b46f6..730bdf7 100644 (file)
--- a/drivers/hwmon/k10temp.c
+++ b/drivers/hwmon/k10temp.c
@@ -33,6 +33,9 @@ static bool force;
 module_param(force, bool, 0444);
 MODULE_PARM_DESC(force, "force loading on processors with erratum 319");
 
+/* Provide lock for writing to NB_SMU_IND_ADDR */
+static DEFINE_MUTEX(nb_smu_ind_mutex);
+
 /* CPUID function 0x80000001, ebx */
 #define CPUID_PKGTYPE_MASK     0xf0000000
 #define CPUID_PKGTYPE_F                0x00000000
@@ -51,13 +54,38 @@ MODULE_PARM_DESC(force, "force loading on processors with erratum 319");
 #define REG_NORTHBRIDGE_CAPABILITIES   0xe8
 #define  NB_CAP_HTC                    0x00000400
 
+/*
+ * For F15h M60h, functionality of REG_REPORTED_TEMPERATURE
+ * has been moved to D0F0xBC_xD820_0CA4 [Reported Temperature
+ * Control]
+ */
+#define F15H_M60H_REPORTED_TEMP_CTRL_OFFSET    0xd8200ca4
+#define PCI_DEVICE_ID_AMD_15H_M60H_NB_F3       0x1573
+
+static void amd_nb_smu_index_read(struct pci_dev *pdev, unsigned int devfn,
+                                 int offset, u32 *val)
+{
+       mutex_lock(&nb_smu_ind_mutex);
+       pci_bus_write_config_dword(pdev->bus, devfn,
+                                  0xb8, offset);
+       pci_bus_read_config_dword(pdev->bus, devfn,
+                                 0xbc, val);
+       mutex_unlock(&nb_smu_ind_mutex);
+}
+
 static ssize_t show_temp(struct device *dev,
                         struct device_attribute *attr, char *buf)
 {
        u32 regval;
-
-       pci_read_config_dword(to_pci_dev(dev),
-                             REG_REPORTED_TEMPERATURE, &regval);
+       struct pci_dev *pdev = to_pci_dev(dev);
+
+       if (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model == 0x60) {
+               amd_nb_smu_index_read(pdev, PCI_DEVFN(0, 0),
+                                     F15H_M60H_REPORTED_TEMP_CTRL_OFFSET,
+                                     &regval);
+       } else {
+               pci_read_config_dword(pdev, REG_REPORTED_TEMPERATURE, &regval);
+       }
        return sprintf(buf, "%u\n", (regval >> 21) * 125);
 }
 
@@ -211,6 +239,7 @@ static const struct pci_device_id k10temp_id_table[] = {
        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
+       { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
        { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
        {}