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platform/x86/amd/pmc: Add PMFW command id to support S2D force flush

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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 <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
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 <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Shyam Sundar S K 2023-09-10 19:50:33 +05:30 committed by Ilpo Järvinen
parent 8df012a7f5
commit cdb1013808
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 8 additions and 1 deletions
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9
drivers/platform/x86/amd/pmc/pmc.c
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@ -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 */