S2D_TELEMETRY_SIZE = 0x01,
S2D_PHYS_ADDR_LOW,
S2D_PHYS_ADDR_HIGH,
+ S2D_NUM_SAMPLES,
};
struct amd_pmc_bit_map {
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;
+ u32 *buf, fsize, num_samples, stb_rdptr_offset = 0;
+ int ret;
buf = kzalloc(S2D_TELEMETRY_BYTES_MAX, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- memcpy_fromio(buf, dev->stb_virt_addr, S2D_TELEMETRY_BYTES_MAX);
+ /* Spill to DRAM num_samples uses separate SMU message port */
+ dev->msg_port = 1;
+
+ /* Get the num_samples to calculate the last push location */
+ ret = amd_pmc_send_cmd(dev, S2D_NUM_SAMPLES, &num_samples, STB_SPILL_TO_DRAM, 1);
+ /* 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;
+ }
+
+ /* Start capturing data from the last push location */
+ if (num_samples > S2D_TELEMETRY_BYTES_MAX) {
+ fsize = S2D_TELEMETRY_BYTES_MAX;
+ stb_rdptr_offset = num_samples - fsize;
+ } else {
+ fsize = num_samples;
+ stb_rdptr_offset = 0;
+ }
+
+ memcpy_fromio(buf, dev->stb_virt_addr + stb_rdptr_offset, fsize);
filp->private_data = buf;
return 0;