Re: [PATCH] drm/xe/xe_debugfs: Expose G-State and PCIe link state debugfs for CRI

On Wed, Aug 05, 2026 at 03:52:26PM +0530, Karthik Poosa wrote:
> Expose G-State and PCIe link state through debugfs for CRI. The PMT
> offsets for these metrics are identical to those used on BMG, so
> remove the BMG_ prefix from the corresponding offset macros to make
> them platform-agnostic.
> 
> Also enable these debugfs support on all dGPU platforms from BMG onward.
> 
> Signed-off-by: Karthik Poosa <[email protected]>
> ---
>  drivers/gpu/drm/xe/regs/xe_pmt.h | 20 ++++++++++----------
>  drivers/gpu/drm/xe/xe_debugfs.c  | 20 ++++++++++----------
>  2 files changed, 20 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/xe/regs/xe_pmt.h b/drivers/gpu/drm/xe/regs/xe_pmt.h
> index a62ab05c6b4c..54df1c8a9f8f 100644
> --- a/drivers/gpu/drm/xe/regs/xe_pmt.h
> +++ b/drivers/gpu/drm/xe/regs/xe_pmt.h
> @@ -20,15 +20,15 @@
>  #define BMG_TELEMETRY_BASE_OFFSET	0xE0000
>  #define BMG_TELEMETRY_OFFSET		(SOC_BASE + BMG_TELEMETRY_BASE_OFFSET)
>  
> -#define BMG_MODS_RESIDENCY_OFFSET		(0x4D0)
> -#define BMG_G2_RESIDENCY_OFFSET		(0x530)
> -#define BMG_G6_RESIDENCY_OFFSET		(0x538)
> -#define BMG_G7_RESIDENCY_OFFSET		(0x4B0)
> -#define BMG_G8_RESIDENCY_OFFSET		(0x540)
> -#define BMG_G10_RESIDENCY_OFFSET		(0x548)
> -
> -#define BMG_PCIE_LINK_L0_RESIDENCY_OFFSET	(0x570)
> -#define BMG_PCIE_LINK_L1_RESIDENCY_OFFSET	(0x578)
> -#define BMG_PCIE_LINK_L1_2_RESIDENCY_OFFSET	(0x580)
> +#define MODS_RESIDENCY_OFFSET		(0x4D0)
> +#define G2_RESIDENCY_OFFSET		(0x530)
> +#define G6_RESIDENCY_OFFSET		(0x538)
> +#define G7_RESIDENCY_OFFSET		(0x4B0)
> +#define G8_RESIDENCY_OFFSET		(0x540)
> +#define G10_RESIDENCY_OFFSET		(0x548)
> +
> +#define PCIE_LINK_L0_RESIDENCY_OFFSET	(0x570)
> +#define PCIE_LINK_L1_RESIDENCY_OFFSET	(0x578)
> +#define PCIE_LINK_L1_2_RESIDENCY_OFFSET	(0x580)
>  
>  #endif
> diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
> index 8de78cd0aa03..9cc104046756 100644
> --- a/drivers/gpu/drm/xe/xe_debugfs.c
> +++ b/drivers/gpu/drm/xe/xe_debugfs.c
> @@ -241,12 +241,12 @@ static int dgfx_pkg_residencies_show(struct seq_file *m, void *data)
>  		u32 offset;
>  		const char *name;
>  	} residencies[] = {
> -		{BMG_G2_RESIDENCY_OFFSET, "Package G2"},
> -		{BMG_G6_RESIDENCY_OFFSET, "Package G6"},
> -		{BMG_G7_RESIDENCY_OFFSET, "Package G7"},
> -		{BMG_G8_RESIDENCY_OFFSET, "Package G8"},
> -		{BMG_G10_RESIDENCY_OFFSET, "Package G10"},
> -		{BMG_MODS_RESIDENCY_OFFSET, "Package ModS"}
> +		{G2_RESIDENCY_OFFSET, "Package G2"},
> +		{G6_RESIDENCY_OFFSET, "Package G6"},
> +		{G7_RESIDENCY_OFFSET, "Package G7"},
> +		{G8_RESIDENCY_OFFSET, "Package G8"},
> +		{G10_RESIDENCY_OFFSET, "Package G10"},
> +		{MODS_RESIDENCY_OFFSET, "Package ModS"}
>  	};
>  
>  	for (int i = 0; i < ARRAY_SIZE(residencies); i++)
> @@ -270,9 +270,9 @@ static int dgfx_pcie_link_residencies_show(struct seq_file *m, void *data)
>  		u32 offset;
>  		const char *name;
>  	} residencies[] = {
> -		{BMG_PCIE_LINK_L0_RESIDENCY_OFFSET, "PCIE LINK L0 RESIDENCY"},
> -		{BMG_PCIE_LINK_L1_RESIDENCY_OFFSET, "PCIE LINK L1 RESIDENCY"},
> -		{BMG_PCIE_LINK_L1_2_RESIDENCY_OFFSET, "PCIE LINK L1.2 RESIDENCY"}
> +		{PCIE_LINK_L0_RESIDENCY_OFFSET, "PCIE LINK L0 RESIDENCY"},
> +		{PCIE_LINK_L1_RESIDENCY_OFFSET, "PCIE LINK L1 RESIDENCY"},
> +		{PCIE_LINK_L1_2_RESIDENCY_OFFSET, "PCIE LINK L1.2 RESIDENCY"}
>  	};
>  
>  	for (int i = 0; i < ARRAY_SIZE(residencies); i++)
> @@ -695,7 +695,7 @@ void xe_debugfs_register(struct xe_device *xe)
>  				 ARRAY_SIZE(debugfs_list),
>  				 root, minor);
>  
> -	if (xe->info.platform == XE_BATTLEMAGE && !IS_SRIOV_VF(xe)) {
> +	if (IS_DGFX(xe) && xe->info.platform >= XE_BATTLEMAGE && !IS_SRIOV_VF(xe)) {

nit, can we have a if VF return separate clause before this dgfx && > bmg?

Perhaps we should have a .has_g_states in the platform flags so if the next
platform changes we would already be protected. Even Sashiko knows that :)

https://sashiko.dev/#/patchset/20260805102226.1764-1-karthik.poosa%40intel.com

>  		drm_debugfs_create_files(debugfs_residencies,
>  					 ARRAY_SIZE(debugfs_residencies),
>  					 root, minor);
> -- 
> 2.25.1
>