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platform/x86/amd: pmc: Get STB DRAM size from PMFW

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Recent PMFW's have support for querying the STB DRAM size. Add this
support to the driver.

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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/20230525141929.866385-3-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Shyam Sundar S K 2023-05-25 19:49:27 +05:30 committed by Hans de Goede
parent a0d61b070d
commit be8325fb3d
1 changed files with 36 additions and 1 deletions
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37
drivers/platform/x86/amd/pmc.c
View File

@ -115,6 +115,7 @@ enum s2d_arg {
S2D_PHYS_ADDR_LOW,
S2D_PHYS_ADDR_HIGH,
S2D_NUM_SAMPLES,
S2D_DRAM_SIZE,
};
struct amd_pmc_bit_map {
@ -147,6 +148,7 @@ struct amd_pmc_dev {
u32 base_addr;
u32 cpu_id;
u32 active_ips;
u32 dram_size;
/* SMU version information */
u8 smu_program;
u8 major;
@ -890,11 +892,39 @@ static const struct pci_device_id pmc_pci_ids[] = {
{ }
};
static int amd_pmc_get_dram_size(struct amd_pmc_dev *dev)
{
int ret;
switch (dev->cpu_id) {
case AMD_CPU_ID_YC:
if (!(dev->major > 90 || (dev->major == 90 && dev->minor > 39))) {
ret = -EINVAL;
goto err_dram_size;
}
break;
default:
ret = -EINVAL;
goto err_dram_size;
}
ret = amd_pmc_send_cmd(dev, S2D_DRAM_SIZE, &dev->dram_size, STB_SPILL_TO_DRAM, true);
if (ret || !dev->dram_size)
goto err_dram_size;
return 0;
err_dram_size:
dev_err(dev->dev, "DRAM size command not supported for this platform\n");
return ret;
}
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;
/* Spill to DRAM feature uses separate SMU message port */
dev->msg_port = 1;
@ -903,6 +933,11 @@ static int amd_pmc_s2d_init(struct amd_pmc_dev *dev)
if (size != S2D_TELEMETRY_BYTES_MAX)
return -EIO;
/* Get DRAM size */
ret = amd_pmc_get_dram_size(dev);
if (ret)
dev->dram_size = S2D_TELEMETRY_DRAMBYTES_MAX;
/* Get STB DRAM address */
amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_LOW, &phys_addr_low, STB_SPILL_TO_DRAM, true);
amd_pmc_send_cmd(dev, S2D_PHYS_ADDR_HIGH, &phys_addr_hi, STB_SPILL_TO_DRAM, true);
@ -912,7 +947,7 @@ static int amd_pmc_s2d_init(struct amd_pmc_dev *dev)
/* Clear msg_port for other SMU operation */
dev->msg_port = 0;
dev->stb_virt_addr = devm_ioremap(dev->dev, stb_phys_addr, S2D_TELEMETRY_DRAMBYTES_MAX);
dev->stb_virt_addr = devm_ioremap(dev->dev, stb_phys_addr, dev->dram_size);
if (!dev->stb_virt_addr)
return -ENOMEM;