From cdb1013808bed0c0c392b44ed4eed6c7743028c3 Mon Sep 17 00:00:00 2001 From: Shyam Sundar S K Date: Sun, 10 Sep 2023 19:50:33 +0530 Subject: [PATCH] platform/x86/amd/pmc: Add PMFW command id to support S2D force flush MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Recent PMFW have the capability that can force flush the FIFO contents to DRAM on sending a command id via the mailbox. Add this support to the driver. Co-developed-by: Sanket Goswami Signed-off-by: Sanket Goswami Signed-off-by: Shyam Sundar S K Link: https://lore.kernel.org/r/20230910142034.2967110-1-Shyam-sundar.S-k@amd.com [ij: Corrected whitespace in dev_dbg_once()] Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- drivers/platform/x86/amd/pmc/pmc.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c index c1e788b67a748..922932a712335 100644 --- a/drivers/platform/x86/amd/pmc/pmc.c +++ b/drivers/platform/x86/amd/pmc/pmc.c @@ -55,6 +55,9 @@ #define S2D_TELEMETRY_BYTES_MAX 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 @@ -236,7 +239,7 @@ static const struct file_operations amd_pmc_stb_debugfs_fops = { 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 *buf, fsize, num_samples, stb_rdptr_offset = 0; + u32 *buf, fsize, num_samples, val, stb_rdptr_offset = 0; int ret; /* Write dummy postcode while reading the STB buffer */ @@ -251,6 +254,10 @@ static int amd_pmc_stb_debugfs_open_v2(struct inode *inode, struct file *filp) /* 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); + /* 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 */ -- 2.30.2