--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * AMD MP1 Smart Trace Buffer (STB) Layer
+ *
+ * Copyright (c) 2024, Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+ * Sanket Goswami <Sanket.Goswami@amd.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/amd_nb.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+#include "pmc.h"
+
+/* STB Spill to DRAM Parameters */
+#define S2D_TELEMETRY_DRAMBYTES_MAX 0x1000000
+#define S2D_TELEMETRY_BYTES_MAX 0x100000U
+#define S2D_RSVD_RAM_SPACE 0x100000
+
+/* STB Registers */
+#define AMD_PMC_STB_PMI_0 0x03E30600
+#define AMD_PMC_STB_DUMMY_PC 0xC6000007
+
+/* STB Spill to DRAM Message Definition */
+#define STB_FORCE_FLUSH_DATA 0xCF
+#define FIFO_SIZE 4096
+
+static bool enable_stb;
+module_param(enable_stb, bool, 0644);
+MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism");
+
+static bool dump_custom_stb;
+module_param(dump_custom_stb, bool, 0644);
+MODULE_PARM_DESC(dump_custom_stb, "Enable to dump full STB buffer");
+
+enum s2d_arg {
+ S2D_TELEMETRY_SIZE = 0x01,
+ S2D_PHYS_ADDR_LOW,
+ S2D_PHYS_ADDR_HIGH,
+ S2D_NUM_SAMPLES,
+ S2D_DRAM_SIZE,
+};
+
+struct amd_pmc_stb_v2_data {
+ size_t size;
+ u8 data[] __counted_by(size);
+};
+
+int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data)
+{
+ int err;
+
+ err = amd_smn_write(0, AMD_PMC_STB_PMI_0, data);
+ if (err) {
+ dev_err(dev->dev, "failed to write data in stb: 0x%X\n", AMD_PMC_STB_PMI_0);
+ return pcibios_err_to_errno(err);
+ }
+
+ return 0;
+}
+
+int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf)
+{
+ int i, err;
+
+ for (i = 0; i < FIFO_SIZE; i++) {
+ err = amd_smn_read(0, AMD_PMC_STB_PMI_0, buf++);
+ if (err) {
+ dev_err(dev->dev, "error reading data from stb: 0x%X\n", AMD_PMC_STB_PMI_0);
+ return pcibios_err_to_errno(err);
+ }
+ }
+
+ return 0;
+}
+
+static int amd_pmc_stb_debugfs_open(struct inode *inode, struct file *filp)
+{
+ struct amd_pmc_dev *dev = filp->f_inode->i_private;
+ u32 size = FIFO_SIZE * sizeof(u32);
+ u32 *buf;
+ int rc;
+
+ buf = kzalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ rc = amd_pmc_read_stb(dev, buf);
+ if (rc) {
+ kfree(buf);
+ return rc;
+ }
+
+ filp->private_data = buf;
+ return rc;
+}
+
+static ssize_t amd_pmc_stb_debugfs_read(struct file *filp, char __user *buf, size_t size,
+ loff_t *pos)
+{
+ if (!filp->private_data)
+ return -EINVAL;
+
+ return simple_read_from_buffer(buf, size, pos, filp->private_data,
+ FIFO_SIZE * sizeof(u32));
+}
+
+static int amd_pmc_stb_debugfs_release(struct inode *inode, struct file *filp)
+{
+ kfree(filp->private_data);
+ return 0;
+}
+
+static const struct file_operations amd_pmc_stb_debugfs_fops = {
+ .owner = THIS_MODULE,
+ .open = amd_pmc_stb_debugfs_open,
+ .read = amd_pmc_stb_debugfs_read,
+ .release = amd_pmc_stb_debugfs_release,
+};
+
+/* Enhanced STB Firmware Reporting Mechanism */
+static int amd_pmc_stb_handle_efr(struct file *filp)
+{
+ struct amd_pmc_dev *dev = filp->f_inode->i_private;
+ struct amd_pmc_stb_v2_data *stb_data_arr;
+ u32 fsize;
+
+ fsize = dev->dram_size - S2D_RSVD_RAM_SPACE;
+ stb_data_arr = kmalloc(struct_size(stb_data_arr, data, fsize), GFP_KERNEL);
+ if (!stb_data_arr)
+ return -ENOMEM;
+
+ stb_data_arr->size = fsize;
+ memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr, fsize);
+ filp->private_data = stb_data_arr;
+
+ return 0;
+}
+
+static int amd_pmc_stb_debugfs_open_v2(struct inode *inode, struct file *filp)
+{
+ struct amd_pmc_dev *dev = filp->f_inode->i_private;
+ u32 fsize, num_samples, val, stb_rdptr_offset = 0;
+ struct amd_pmc_stb_v2_data *stb_data_arr;
+ int ret;
+
+ /* Write dummy postcode while reading the STB buffer */
+ ret = amd_pmc_write_stb(dev, AMD_PMC_STB_DUMMY_PC);
+ if (ret)
+ dev_err(dev->dev, "error writing to STB: %d\n", ret);
+
+ /* Spill to DRAM num_samples uses separate SMU message port */
+ dev->msg_port = 1;
+
+ ret = amd_pmc_send_cmd(dev, 0, &val, STB_FORCE_FLUSH_DATA, 1);
+ if (ret)
+ dev_dbg_once(dev->dev, "S2D force flush not supported: %d\n", ret);
+
+ /*
+ * We have a custom stb size and the PMFW is supposed to give
+ * the enhanced dram size. Note that we land here only for the
+ * platforms that support enhanced dram size reporting.
+ */
+ if (dump_custom_stb)
+ return amd_pmc_stb_handle_efr(filp);
+
+ /* Get the num_samples to calculate the last push location */
+ ret = amd_pmc_send_cmd(dev, S2D_NUM_SAMPLES, &num_samples, dev->s2d_msg_id, true);
+ /* Clear msg_port for other SMU operation */
+ dev->msg_port = 0;
+ if (ret) {
+ dev_err(dev->dev, "error: S2D_NUM_SAMPLES not supported : %d\n", ret);
+ return ret;
+ }
+
+ fsize = min(num_samples, S2D_TELEMETRY_BYTES_MAX);
+ stb_data_arr = kmalloc(struct_size(stb_data_arr, data, fsize), GFP_KERNEL);
+ if (!stb_data_arr)
+ return -ENOMEM;
+
+ stb_data_arr->size = fsize;
+
+ /*
+ * Start capturing data from the last push location.
+ * This is for general cases, where the stb limits
+ * are meant for standard usage.
+ */
+ if (num_samples > S2D_TELEMETRY_BYTES_MAX) {
+ /* First read oldest data starting 1 behind last write till end of ringbuffer */
+ stb_rdptr_offset = num_samples % S2D_TELEMETRY_BYTES_MAX;
+ fsize = S2D_TELEMETRY_BYTES_MAX - stb_rdptr_offset;
+
+ memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr + stb_rdptr_offset, fsize);
+ /* Second copy the newer samples from offset 0 - last write */
+ memcpy_fromio(stb_data_arr->data + fsize, dev->stb_virt_addr, stb_rdptr_offset);
+ } else {
+ memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr, fsize);
+ }
+
+ filp->private_data = stb_data_arr;
+
+ return 0;
+}
+
+static ssize_t amd_pmc_stb_debugfs_read_v2(struct file *filp, char __user *buf, size_t size,
+ loff_t *pos)
+{
+ struct amd_pmc_stb_v2_data *data = filp->private_data;
+
+ return simple_read_from_buffer(buf, size, pos, data->data, data->size);
+}
+
+static int amd_pmc_stb_debugfs_release_v2(struct inode *inode, struct file *filp)
+{
+ kfree(filp->private_data);
+ return 0;
+}
+
+static const struct file_operations amd_pmc_stb_debugfs_fops_v2 = {
+ .owner = THIS_MODULE,
+ .open = amd_pmc_stb_debugfs_open_v2,
+ .read = amd_pmc_stb_debugfs_read_v2,
+ .release = amd_pmc_stb_debugfs_release_v2,
+};
+
+static bool amd_pmc_is_stb_supported(struct amd_pmc_dev *dev)
+{
+ switch (dev->cpu_id) {
+ case AMD_CPU_ID_YC:
+ case AMD_CPU_ID_CB:
+ dev->s2d_msg_id = 0xBE;
+ return true;
+ case AMD_CPU_ID_PS:
+ dev->s2d_msg_id = 0x85;
+ return true;
+ case PCI_DEVICE_ID_AMD_1AH_M20H_ROOT:
+ case PCI_DEVICE_ID_AMD_1AH_M60H_ROOT:
+ dev->s2d_msg_id = 0xDE;
+ return true;
+ default:
+ return false;
+ }
+}
+
+int amd_pmc_s2d_init(struct amd_pmc_dev *dev)
+{
+ u32 phys_addr_low, phys_addr_hi;
+ u64 stb_phys_addr;
+ u32 size = 0;
+ int ret;
+
+ if (!enable_stb)
+ return 0;
+
+ if (amd_pmc_is_stb_supported(dev)) {
+ debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev,
+ &amd_pmc_stb_debugfs_fops_v2);
+ } else {
+ debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev,
+ &amd_pmc_stb_debugfs_fops);
+ return 0;
+ }
+
+ /* Spill to DRAM feature uses separate SMU message port */
+ dev->msg_port = 1;
+
+ amd_pmc_send_cmd(dev, S2D_TELEMETRY_SIZE, &size, dev->s2d_msg_id, true);
+ if (size != S2D_TELEMETRY_BYTES_MAX)
+ return -EIO;
+
+ /* Get DRAM size */
+ ret = amd_pmc_send_cmd(dev, S2D_DRAM_SIZE, &dev->dram_size, dev->s2d_msg_id, true);
+ if (ret || !dev->dram_size)
+ dev->dram_size = S2D_TELEMETRY_DRAMBYTES_MAX;
+
+ /* Get STB DRAM address */
+ amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_LOW, &phys_addr_low, dev->s2d_msg_id, true);
+ amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_HIGH, &phys_addr_hi, dev->s2d_msg_id, true);
+
+ stb_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low);
+
+ /* Clear msg_port for other SMU operation */
+ dev->msg_port = 0;
+
+ dev->stb_virt_addr = devm_ioremap(dev->dev, stb_phys_addr, dev->dram_size);
+ if (!dev->stb_virt_addr)
+ return -ENOMEM;
+
+ return 0;
+}
#define AMD_PMC_SCRATCH_REG_1AH 0xF14
/* STB Registers */
-#define AMD_PMC_STB_PMI_0 0x03E30600
#define AMD_PMC_STB_S2IDLE_PREPARE 0xC6000001
#define AMD_PMC_STB_S2IDLE_RESTORE 0xC6000002
#define AMD_PMC_STB_S2IDLE_CHECK 0xC6000003
-#define AMD_PMC_STB_DUMMY_PC 0xC6000007
/* STB S2D(Spill to DRAM) has different message port offset */
#define AMD_S2D_REGISTER_MESSAGE 0xA20
#define AMD_S2D_REGISTER_RESPONSE 0xA80
#define AMD_S2D_REGISTER_ARGUMENT 0xA88
-/* STB Spill to DRAM Parameters */
-#define S2D_TELEMETRY_BYTES_MAX 0x100000U
-#define S2D_RSVD_RAM_SPACE 0x100000
-#define S2D_TELEMETRY_DRAMBYTES_MAX 0x1000000
-
-/* STB Spill to DRAM Message Definition */
-#define STB_FORCE_FLUSH_DATA 0xCF
-
/* Base address of SMU for mapping physical address to virtual address */
#define AMD_PMC_MAPPING_SIZE 0x01000
#define AMD_PMC_BASE_ADDR_OFFSET 0x10000
#define DELAY_MIN_US 2000
#define DELAY_MAX_US 3000
-#define FIFO_SIZE 4096
enum amd_pmc_def {
MSG_TEST = 0x01,
MSG_OS_HINT_RN,
};
-enum s2d_arg {
- S2D_TELEMETRY_SIZE = 0x01,
- S2D_PHYS_ADDR_LOW,
- S2D_PHYS_ADDR_HIGH,
- S2D_NUM_SAMPLES,
- S2D_DRAM_SIZE,
-};
-
-struct amd_pmc_stb_v2_data {
- size_t size;
- u8 data[] __counted_by(size);
-};
-
struct amd_pmc_bit_map {
const char *name;
u32 bit_mask;
{}
};
-static bool enable_stb;
-module_param(enable_stb, bool, 0644);
-MODULE_PARM_DESC(enable_stb, "Enable the STB debug mechanism");
-
static bool disable_workarounds;
module_param(disable_workarounds, bool, 0644);
MODULE_PARM_DESC(disable_workarounds, "Disable workarounds for platform bugs");
-static bool dump_custom_stb;
-module_param(dump_custom_stb, bool, 0644);
-MODULE_PARM_DESC(dump_custom_stb, "Enable to dump full STB buffer");
-
static struct amd_pmc_dev pmc;
-static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret);
-static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf);
-static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data);
static inline u32 amd_pmc_reg_read(struct amd_pmc_dev *dev, int reg_offset)
{
u64 timecondition_notmet_totaltime[32];
} __packed;
-static int amd_pmc_stb_debugfs_open(struct inode *inode, struct file *filp)
-{
- struct amd_pmc_dev *dev = filp->f_inode->i_private;
- u32 size = FIFO_SIZE * sizeof(u32);
- u32 *buf;
- int rc;
-
- buf = kzalloc(size, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- rc = amd_pmc_read_stb(dev, buf);
- if (rc) {
- kfree(buf);
- return rc;
- }
-
- filp->private_data = buf;
- return rc;
-}
-
-static ssize_t amd_pmc_stb_debugfs_read(struct file *filp, char __user *buf, size_t size,
- loff_t *pos)
-{
- if (!filp->private_data)
- return -EINVAL;
-
- return simple_read_from_buffer(buf, size, pos, filp->private_data,
- FIFO_SIZE * sizeof(u32));
-}
-
-static int amd_pmc_stb_debugfs_release(struct inode *inode, struct file *filp)
-{
- kfree(filp->private_data);
- return 0;
-}
-
-static const struct file_operations amd_pmc_stb_debugfs_fops = {
- .owner = THIS_MODULE,
- .open = amd_pmc_stb_debugfs_open,
- .read = amd_pmc_stb_debugfs_read,
- .release = amd_pmc_stb_debugfs_release,
-};
-
-/* Enhanced STB Firmware Reporting Mechanism */
-static int amd_pmc_stb_handle_efr(struct file *filp)
-{
- struct amd_pmc_dev *dev = filp->f_inode->i_private;
- struct amd_pmc_stb_v2_data *stb_data_arr;
- u32 fsize;
-
- fsize = dev->dram_size - S2D_RSVD_RAM_SPACE;
- stb_data_arr = kmalloc(struct_size(stb_data_arr, data, fsize), GFP_KERNEL);
- if (!stb_data_arr)
- return -ENOMEM;
-
- stb_data_arr->size = fsize;
- memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr, fsize);
- filp->private_data = stb_data_arr;
-
- return 0;
-}
-
-static int amd_pmc_stb_debugfs_open_v2(struct inode *inode, struct file *filp)
-{
- struct amd_pmc_dev *dev = filp->f_inode->i_private;
- u32 fsize, num_samples, val, stb_rdptr_offset = 0;
- struct amd_pmc_stb_v2_data *stb_data_arr;
- int ret;
-
- /* Write dummy postcode while reading the STB buffer */
- ret = amd_pmc_write_stb(dev, AMD_PMC_STB_DUMMY_PC);
- if (ret)
- dev_err(dev->dev, "error writing to STB: %d\n", ret);
-
- /* Spill to DRAM num_samples uses separate SMU message port */
- dev->msg_port = 1;
-
- ret = amd_pmc_send_cmd(dev, 0, &val, STB_FORCE_FLUSH_DATA, 1);
- if (ret)
- dev_dbg_once(dev->dev, "S2D force flush not supported: %d\n", ret);
-
- /*
- * We have a custom stb size and the PMFW is supposed to give
- * the enhanced dram size. Note that we land here only for the
- * platforms that support enhanced dram size reporting.
- */
- if (dump_custom_stb)
- return amd_pmc_stb_handle_efr(filp);
-
- /* Get the num_samples to calculate the last push location */
- ret = amd_pmc_send_cmd(dev, S2D_NUM_SAMPLES, &num_samples, dev->s2d_msg_id, true);
- /* Clear msg_port for other SMU operation */
- dev->msg_port = 0;
- if (ret) {
- dev_err(dev->dev, "error: S2D_NUM_SAMPLES not supported : %d\n", ret);
- return ret;
- }
-
- fsize = min(num_samples, S2D_TELEMETRY_BYTES_MAX);
- stb_data_arr = kmalloc(struct_size(stb_data_arr, data, fsize), GFP_KERNEL);
- if (!stb_data_arr)
- return -ENOMEM;
-
- stb_data_arr->size = fsize;
-
- /*
- * Start capturing data from the last push location.
- * This is for general cases, where the stb limits
- * are meant for standard usage.
- */
- if (num_samples > S2D_TELEMETRY_BYTES_MAX) {
- /* First read oldest data starting 1 behind last write till end of ringbuffer */
- stb_rdptr_offset = num_samples % S2D_TELEMETRY_BYTES_MAX;
- fsize = S2D_TELEMETRY_BYTES_MAX - stb_rdptr_offset;
-
- memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr + stb_rdptr_offset, fsize);
- /* Second copy the newer samples from offset 0 - last write */
- memcpy_fromio(stb_data_arr->data + fsize, dev->stb_virt_addr, stb_rdptr_offset);
- } else {
- memcpy_fromio(stb_data_arr->data, dev->stb_virt_addr, fsize);
- }
-
- filp->private_data = stb_data_arr;
-
- return 0;
-}
-
-static ssize_t amd_pmc_stb_debugfs_read_v2(struct file *filp, char __user *buf, size_t size,
- loff_t *pos)
-{
- struct amd_pmc_stb_v2_data *data = filp->private_data;
-
- return simple_read_from_buffer(buf, size, pos, data->data, data->size);
-}
-
-static int amd_pmc_stb_debugfs_release_v2(struct inode *inode, struct file *filp)
-{
- kfree(filp->private_data);
- return 0;
-}
-
-static const struct file_operations amd_pmc_stb_debugfs_fops_v2 = {
- .owner = THIS_MODULE,
- .open = amd_pmc_stb_debugfs_open_v2,
- .read = amd_pmc_stb_debugfs_read_v2,
- .release = amd_pmc_stb_debugfs_release_v2,
-};
-
static void amd_pmc_get_ip_info(struct amd_pmc_dev *dev)
{
switch (dev->cpu_id) {
case AMD_CPU_ID_YC:
case AMD_CPU_ID_CB:
dev->num_ips = 12;
- dev->s2d_msg_id = 0xBE;
dev->smu_msg = 0x538;
break;
case AMD_CPU_ID_PS:
dev->num_ips = 21;
- dev->s2d_msg_id = 0x85;
dev->smu_msg = 0x538;
break;
case PCI_DEVICE_ID_AMD_1AH_M20H_ROOT:
case PCI_DEVICE_ID_AMD_1AH_M60H_ROOT:
dev->num_ips = 22;
- dev->s2d_msg_id = 0xDE;
dev->smu_msg = 0x938;
break;
}
debugfs_remove_recursive(dev->dbgfs_dir);
}
-static bool amd_pmc_is_stb_supported(struct amd_pmc_dev *dev)
-{
- switch (dev->cpu_id) {
- case AMD_CPU_ID_YC:
- case AMD_CPU_ID_CB:
- case AMD_CPU_ID_PS:
- case PCI_DEVICE_ID_AMD_1AH_M20H_ROOT:
- case PCI_DEVICE_ID_AMD_1AH_M60H_ROOT:
- return true;
- default:
- return false;
- }
-}
-
static void amd_pmc_dbgfs_register(struct amd_pmc_dev *dev)
{
dev->dbgfs_dir = debugfs_create_dir("amd_pmc", NULL);
dev_dbg(dev->dev, "AMD_%s_REGISTER_MESSAGE:%x\n", dev->msg_port ? "S2D" : "PMC", value);
}
-static int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret)
+int amd_pmc_send_cmd(struct amd_pmc_dev *dev, u32 arg, u32 *data, u8 msg, bool ret)
{
int rc;
u32 val, message, argument, response;
{ }
};
-static int amd_pmc_s2d_init(struct amd_pmc_dev *dev)
-{
- u32 phys_addr_low, phys_addr_hi;
- u64 stb_phys_addr;
- u32 size = 0;
- int ret;
-
- if (!enable_stb)
- return 0;
-
- if (amd_pmc_is_stb_supported(dev)) {
- debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev,
- &amd_pmc_stb_debugfs_fops_v2);
- } else {
- debugfs_create_file("stb_read", 0644, dev->dbgfs_dir, dev,
- &amd_pmc_stb_debugfs_fops);
- return 0;
- }
-
- /* Spill to DRAM feature uses separate SMU message port */
- dev->msg_port = 1;
-
- amd_pmc_send_cmd(dev, S2D_TELEMETRY_SIZE, &size, dev->s2d_msg_id, true);
- if (size != S2D_TELEMETRY_BYTES_MAX)
- return -EIO;
-
- /* Get DRAM size */
- ret = amd_pmc_send_cmd(dev, S2D_DRAM_SIZE, &dev->dram_size, dev->s2d_msg_id, true);
- if (ret || !dev->dram_size)
- dev->dram_size = S2D_TELEMETRY_DRAMBYTES_MAX;
-
- /* Get STB DRAM address */
- amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_LOW, &phys_addr_low, dev->s2d_msg_id, true);
- amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_HIGH, &phys_addr_hi, dev->s2d_msg_id, true);
-
- if (!phys_addr_hi && !phys_addr_low) {
- dev_err(dev->dev, "STB is not enabled on the system; disable enable_stb or contact system vendor\n");
- return -EINVAL;
- }
-
- stb_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low);
-
- /* Clear msg_port for other SMU operation */
- dev->msg_port = 0;
-
- dev->stb_virt_addr = devm_ioremap(dev->dev, stb_phys_addr, dev->dram_size);
- if (!dev->stb_virt_addr)
- return -ENOMEM;
-
- return 0;
-}
-
-static int amd_pmc_write_stb(struct amd_pmc_dev *dev, u32 data)
-{
- int err;
-
- err = amd_smn_write(0, AMD_PMC_STB_PMI_0, data);
- if (err) {
- dev_err(dev->dev, "failed to write data in stb: 0x%X\n", AMD_PMC_STB_PMI_0);
- return pcibios_err_to_errno(err);
- }
-
- return 0;
-}
-
-static int amd_pmc_read_stb(struct amd_pmc_dev *dev, u32 *buf)
-{
- int i, err;
-
- for (i = 0; i < FIFO_SIZE; i++) {
- err = amd_smn_read(0, AMD_PMC_STB_PMI_0, buf++);
- if (err) {
- dev_err(dev->dev, "error reading data from stb: 0x%X\n", AMD_PMC_STB_PMI_0);
- return pcibios_err_to_errno(err);
- }
- }
-
- return 0;
-}
-
static int amd_pmc_probe(struct platform_device *pdev)
{
struct amd_pmc_dev *dev = &pmc;
projects / thirdparty / linux.git / commitdiff
