Hi,
On 5/13/23 03:14, Mario Limonciello wrote:
> After suspend/resume cycle there is an error message and auto-mode
> or CnQF stops working.
>
> [ 5741.447511] amd-pmf AMDI0100:00: SMU cmd failed. err: 0xff
> [ 5741.447523] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_RESPONSE:ff
> [ 5741.447527] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_ARGUMENT:7
> [ 5741.447531] amd-pmf AMDI0100:00: AMD_PMF_REGISTER_MESSAGE:16
> [ 5741.447540] amd-pmf AMDI0100:00: [AUTO_MODE] avg power: 0 mW mode: QUIET
>
> This is because the DRAM address used for accessing metrics table
> needs to be refreshed after a suspend resume cycle. Add a resume
> callback to reset this again.
>
> Fixes: 1a409b35c995 ("platform/x86/amd/pmf: Get performance metrics from PMFW")
> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Thank you for your patch, I've applied this patch to my fixes
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes
Note it will show up in my fixes branch once I've pushed my
local branch there, which might take a while.
I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.
Regards,
Hans
> ---
> drivers/platform/x86/amd/pmf/core.c | 32 ++++++++++++++++++++++-------
> 1 file changed, 25 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
> index d5bb775dadcf..ee5f124f78b6 100644
> --- a/drivers/platform/x86/amd/pmf/core.c
> +++ b/drivers/platform/x86/amd/pmf/core.c
> @@ -245,24 +245,29 @@ static const struct pci_device_id pmf_pci_ids[] = {
> { }
> };
>
> -int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
> +static void amd_pmf_set_dram_addr(struct amd_pmf_dev *dev)
> {
> u64 phys_addr;
> u32 hi, low;
>
> - INIT_DELAYED_WORK(&dev->work_buffer, amd_pmf_get_metrics);
> + phys_addr = virt_to_phys(dev->buf);
> + hi = phys_addr >> 32;
> + low = phys_addr & GENMASK(31, 0);
> +
> + amd_pmf_send_cmd(dev, SET_DRAM_ADDR_HIGH, 0, hi, NULL);
> + amd_pmf_send_cmd(dev, SET_DRAM_ADDR_LOW, 0, low, NULL);
> +}
>
> +int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
> +{
> /* Get Metrics Table Address */
> dev->buf = kzalloc(sizeof(dev->m_table), GFP_KERNEL);
> if (!dev->buf)
> return -ENOMEM;
>
> - phys_addr = virt_to_phys(dev->buf);
> - hi = phys_addr >> 32;
> - low = phys_addr & GENMASK(31, 0);
> + INIT_DELAYED_WORK(&dev->work_buffer, amd_pmf_get_metrics);
>
> - amd_pmf_send_cmd(dev, SET_DRAM_ADDR_HIGH, 0, hi, NULL);
> - amd_pmf_send_cmd(dev, SET_DRAM_ADDR_LOW, 0, low, NULL);
> + amd_pmf_set_dram_addr(dev);
>
> /*
> * Start collecting the metrics data after a small delay
> @@ -273,6 +278,18 @@ int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev)
> return 0;
> }
>
> +static int amd_pmf_resume_handler(struct device *dev)
> +{
> + struct amd_pmf_dev *pdev = dev_get_drvdata(dev);
> +
> + if (pdev->buf)
> + amd_pmf_set_dram_addr(pdev);
> +
> + return 0;
> +}
> +
> +static DEFINE_SIMPLE_DEV_PM_OPS(amd_pmf_pm, NULL, amd_pmf_resume_handler);
> +
> static void amd_pmf_init_features(struct amd_pmf_dev *dev)
> {
> int ret;
> @@ -413,6 +430,7 @@ static struct platform_driver amd_pmf_driver = {
> .name = "amd-pmf",
> .acpi_match_table = amd_pmf_acpi_ids,
> .dev_groups = amd_pmf_driver_groups,
> + .pm = pm_sleep_ptr(&amd_pmf_pm),
> },
> .probe = amd_pmf_probe,
> .remove_new = amd_pmf_remove,
