diff options
| -rw-r--r-- | drivers/platform/x86/amd/pmc/pmc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c index bc254e1fa71a..cd6ac04c1468 100644 --- a/drivers/platform/x86/amd/pmc/pmc.c +++ b/drivers/platform/x86/amd/pmc/pmc.c @@ -53,6 +53,7 @@ /* 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 */ @@ -165,6 +166,10 @@ 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); @@ -241,6 +246,25 @@ static const struct file_operations amd_pmc_stb_debugfs_fops = { .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; @@ -260,6 +284,14 @@ static int amd_pmc_stb_debugfs_open_v2(struct inode *inode, struct file *filp) 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 */ |