Re: [PATCH v4 10/13] drm/xe/xe_ras: Add support to offline/decline a page

["Tauro, Riana" <riana.tauro@intel.com>]

On 4/21/2026 11:51 AM, Upadhyay, Tejas wrote:
>
>> -----Original Message-----
>> From: Tauro, Riana <riana.tauro@intel.com>
>> Sent: 17 April 2026 14:28
>> To: intel-xe@lists.freedesktop.org
>> Cc: Tauro, Riana <riana.tauro@intel.com>; Gupta, Anshuman
>> <anshuman.gupta@intel.com>; Vivi, Rodrigo <rodrigo.vivi@intel.com>;
>> aravind.iddamsetty@linux.intel.com; Nilawar, Badal
>> <badal.nilawar@intel.com>; Jadav, Raag <raag.jadav@intel.com>;
>> Koppuravuri, Ravi Kishore <ravi.kishore.koppuravuri@intel.com>; Koujalagi,
>> Mallesh <mallesh.koujalagi@intel.com>; Purkait, Soham
>> <soham.purkait@intel.com>; Upadhyay, Tejas <tejas.upadhyay@intel.com>;
>> Ghimiray, Himal Prasad <himal.prasad.ghimiray@intel.com>
>> Subject: [PATCH v4 10/13] drm/xe/xe_ras: Add support to offline/decline a
>> page
>>
>> Add a helper function that sends commands to system controller to
>> offline/decline a page based on user policy.
>>
>> Cc: Tejas Upadhyay <tejas.upadhyay@intel.com>
>> Cc: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
>> Signed-off-by: Riana Tauro <riana.tauro@intel.com>
>> ---
>>   drivers/gpu/drm/xe/xe_ras.c                   | 51 +++++++++++++++++++
>>   drivers/gpu/drm/xe/xe_ras.h                   |  2 +
>>   drivers/gpu/drm/xe/xe_ras_types.h             | 37 ++++++++++++++
>>   drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h |  4 +-
>>   4 files changed, 93 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/xe/xe_ras.c b/drivers/gpu/drm/xe/xe_ras.c index
>> 347844b3d2bf..cd1ac6441b92 100644
>> --- a/drivers/gpu/drm/xe/xe_ras.c
>> +++ b/drivers/gpu/drm/xe/xe_ras.c
>> @@ -268,6 +268,57 @@ enum xe_ras_recovery_action
>> xe_ras_process_errors(struct xe_device *xe)
>>   	return XE_RAS_RECOVERY_ACTION_RESET;
>>   }
>>
>> +/**
>> + * xe_ras_page_offline() - Send page offline/decline request to system
>> +controller
>> + * @xe: xe device instance
>> + * @action: Action to be performed (offline/decline)
>> + * @page_address: address of the page
>> + *
>> + * Returns: 0 on success, negative error code on failure  */ int
>> +xe_ras_page_offline(struct xe_device *xe, enum xe_ras_page_action
>> +action, u64 page_address) {
> Where is this used?

I have just added helpers. The integration of this is dependent on your 
patch
Intel Xe - Patchwork.
<https://patchwork.freedesktop.org/series/161473/>
Only once this patch is merged i will be able to integrate this

Riana

>
> Tejas
>> +	struct xe_sysctrl_mailbox_command command = {0};
>> +	struct xe_ras_page_offline_request request = {0};
>> +	struct xe_ras_page_offline_response response = {0};
>> +	size_t rlen;
>> +	int ret;
>> +
>> +	if (!xe->info.has_sysctrl)
>> +		return 0;
>> +
>> +	if (action >= XE_RAS_PAGE_ACTION_MAX) {
>> +		xe_err(xe, "[RAS]: Invalid page offline action %d\n", action);
>> +		return -EINVAL;
>> +	}
>> +
>> +	request.page_address = page_address;
>> +	request.action = action;
>> +
>> +	prepare_sysctrl_command(&command,
>> XE_SYSCTRL_CMD_PAGE_OFFLINE, &request,
>> +				sizeof(request), &response,
>> sizeof(response));
>> +
>> +	ret = xe_sysctrl_send_command(&xe->sc, &command, &rlen);
>> +	if (ret) {
>> +		xe_err(xe, "[RAS]: sysctrl: error ret %d\n", ret);
>> +		return ret;
>> +	}
>> +
>> +	if (rlen != sizeof(response)) {
>> +		xe_err(xe, "[RAS]: sysctrl: response size mismatch. Expected
>> %zu, got %zu\n",
>> +		       sizeof(response), rlen);
>> +		return -EINVAL;
>> +	}
>> +
>> +	if (response.status) {
>> +		xe_err(xe, "[RAS]: sysctrl: Page offline command failed with
>> status %u\n",
>> +		       response.status);
>> +		return -EIO;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>>   #ifdef CONFIG_PCIEAER
>>   static void aer_unmask_and_downgrade_internal_error(struct xe_device *xe)
>> { diff --git a/drivers/gpu/drm/xe/xe_ras.h b/drivers/gpu/drm/xe/xe_ras.h
>> index e191ab80080c..ec59258eb3df 100644
>> --- a/drivers/gpu/drm/xe/xe_ras.h
>> +++ b/drivers/gpu/drm/xe/xe_ras.h
>> @@ -12,5 +12,7 @@ struct xe_device;
>>
>>   void xe_ras_init(struct xe_device *xe);  enum xe_ras_recovery_action
>> xe_ras_process_errors(struct xe_device *xe);
>> +int xe_ras_page_offline(struct xe_device *xe, enum xe_ras_page_action
>> action,
>> +			u64 page_address);
>>
>>   #endif
>> diff --git a/drivers/gpu/drm/xe/xe_ras_types.h
>> b/drivers/gpu/drm/xe/xe_ras_types.h
>> index 020e3f92a057..d76310866da5 100644
>> --- a/drivers/gpu/drm/xe/xe_ras_types.h
>> +++ b/drivers/gpu/drm/xe/xe_ras_types.h
>> @@ -30,6 +30,19 @@ enum xe_ras_recovery_action {
>>   	XE_RAS_RECOVERY_ACTION_MAX
>>   };
>>
>> +/**
>> + * enum xe_ras_page_action - Page offline actions for page offline
>> +request
>> + *
>> + * @XE_RAS_PAGE_ACTION_OFFLINE: Instruct firmware to remove page
>> from
>> +queue
>> + * @XE_RAS_PAGE_ACTION_DECLINE: Instruct firmware to mark page as not
>> +offline
>> + * @XE_RAS_PAGE_ACTION_MAX: Max value for validation  */ enum
>> +xe_ras_page_action {
>> +	XE_RAS_PAGE_ACTION_OFFLINE,
>> +	XE_RAS_PAGE_ACTION_DECLINE,
>> +	XE_RAS_PAGE_ACTION_MAX
>> +};
>> +
>>   /**
>>    * struct xe_ras_error_common - Common RAS error class
>>    *
>> @@ -260,4 +273,28 @@ struct xe_ras_memory_error {
>>   	/** @reserved2: Reserved for future use */
>>   	u32 reserved2[2];
>>   } __packed;
>> +
>> +/**
>> + * struct xe_ras_page_offline_request - Request for page offline
>> +command
>> + *
>> + * This structure provides the request format to offline/decline a page
>> +*/ struct xe_ras_page_offline_request {
>> +	/** @page_address: Page address (4KB aligned) */
>> +	u64 page_address;
>> +	/** @action: Action to be performed (enum xe_ras_page_action) */
>> +	u32 action;
>> +	/** @reserved: Reserved for future use */
>> +	u32 reserved;
>> +} __packed;
>> +
>> +/**
>> + * struct xe_ras_page_offline_response - Response from page offline
>> +command  */ struct xe_ras_page_offline_response {
>> +	/** @status: Status of the page offline request */
>> +	u32 status;
>> +	/** @reserved: Reserved for future use */
>> +	u32 reserved;
>> +} __packed;
>>   #endif
>> diff --git a/drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h
>> b/drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h
>> index 00a0f05aab32..2cafa8a14cc3 100644
>> --- a/drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h
>> +++ b/drivers/gpu/drm/xe/xe_sysctrl_mailbox_types.h
>> @@ -14,9 +14,11 @@
>>    * enum xe_sysctrl_mailbox_command_id - Command ID's for GFSP group
>>    *
>>    * @XE_SYSCTRL_CMD_GET_SOC_ERROR: Get basic error information
>> + * @XE_SYSCTRL_CMD_PAGE_OFFLINE: Instruct firmware to offline/decline a
>> + page
>>    */
>>   enum xe_sysctrl_mailbox_command_id {
>> -	XE_SYSCTRL_CMD_GET_SOC_ERROR		= 0x01
>> +	XE_SYSCTRL_CMD_GET_SOC_ERROR		= 0x01,
>> +	XE_SYSCTRL_CMD_PAGE_OFFLINE		= 0x08
>>   };
>>
>>   enum xe_sysctrl_group {
>> --
>> 2.47.1