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drm/xe/pf: Add _locked variants of the VF EQ config functions

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In upcoming patches we will want to configure VF's execution
quantum (EQ) on all GTs under single lock to avoid potential
races in parallel GT configuration attempts.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20251030222348.186658-4-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko 2025-10-30 23:23:34 +01:00
parent f909179475
commit 5186df42bd
2 changed files with 55 additions and 19 deletions
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70
drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
View File

@ -1732,47 +1732,79 @@ static int pf_get_exec_quantum(struct xe_gt *gt, unsigned int vfid)
}
/**
* xe_gt_sriov_pf_config_set_exec_quantum - Configure execution quantum for the VF.
* xe_gt_sriov_pf_config_set_exec_quantum_locked() - Configure PF/VF execution quantum.
* @gt: the &xe_gt
* @vfid: the VF identifier
* @vfid: the PF or VF identifier
* @exec_quantum: requested execution quantum in milliseconds (0 is infinity)
*
* This function can only be called on PF with the master mutex hold.
* It will log the provisioned value or an error in case of the failure.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_gt_sriov_pf_config_set_exec_quantum_locked(struct xe_gt *gt, unsigned int vfid,
u32 exec_quantum)
{
int err;
lockdep_assert_held(xe_gt_sriov_pf_master_mutex(gt));
err = pf_provision_exec_quantum(gt, vfid, exec_quantum);
return pf_config_set_u32_done(gt, vfid, exec_quantum,
pf_get_exec_quantum(gt, vfid),
"execution quantum", exec_quantum_unit, err);
}
/**
* xe_gt_sriov_pf_config_set_exec_quantum() - Configure PF/VF execution quantum.
* @gt: the &xe_gt
* @vfid: the PF or VF identifier
* @exec_quantum: requested execution quantum in milliseconds (0 is infinity)
*
* This function can only be called on PF.
* It will log the provisioned value or an error in case of the failure.
*
* Return: 0 on success or a negative error code on failure.
*/
int xe_gt_sriov_pf_config_set_exec_quantum(struct xe_gt *gt, unsigned int vfid,
u32 exec_quantum)
{
int err;
guard(mutex)(xe_gt_sriov_pf_master_mutex(gt));
mutex_lock(xe_gt_sriov_pf_master_mutex(gt));
err = pf_provision_exec_quantum(gt, vfid, exec_quantum);
mutex_unlock(xe_gt_sriov_pf_master_mutex(gt));
return pf_config_set_u32_done(gt, vfid, exec_quantum,
xe_gt_sriov_pf_config_get_exec_quantum(gt, vfid),
"execution quantum", exec_quantum_unit, err);
return xe_gt_sriov_pf_config_set_exec_quantum_locked(gt, vfid, exec_quantum);
}
/**
* xe_gt_sriov_pf_config_get_exec_quantum - Get VF's execution quantum.
* xe_gt_sriov_pf_config_get_exec_quantum_locked() - Get PF/VF execution quantum.
* @gt: the &xe_gt
* @vfid: the VF identifier
* @vfid: the PF or VF identifier
*
* This function can only be called on PF with the master mutex hold.
*
* Return: execution quantum in milliseconds (or 0 if infinity).
*/
u32 xe_gt_sriov_pf_config_get_exec_quantum_locked(struct xe_gt *gt, unsigned int vfid)
{
lockdep_assert_held(xe_gt_sriov_pf_master_mutex(gt));
return pf_get_exec_quantum(gt, vfid);
}
/**
* xe_gt_sriov_pf_config_get_exec_quantum() - Get PF/VF execution quantum.
* @gt: the &xe_gt
* @vfid: the PF or VF identifier
*
* This function can only be called on PF.
*
* Return: VF's (or PF's) execution quantum in milliseconds.
* Return: execution quantum in milliseconds (or 0 if infinity).
*/
u32 xe_gt_sriov_pf_config_get_exec_quantum(struct xe_gt *gt, unsigned int vfid)
{
u32 exec_quantum;
guard(mutex)(xe_gt_sriov_pf_master_mutex(gt));
mutex_lock(xe_gt_sriov_pf_master_mutex(gt));
exec_quantum = pf_get_exec_quantum(gt, vfid);
mutex_unlock(xe_gt_sriov_pf_master_mutex(gt));
return exec_quantum;
return pf_get_exec_quantum(gt, vfid);
}
static const char *preempt_timeout_unit(u32 preempt_timeout)

4
drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h
View File

@ -40,6 +40,10 @@ int xe_gt_sriov_pf_config_bulk_set_lmem(struct xe_gt *gt, unsigned int vfid, uns
u32 xe_gt_sriov_pf_config_get_exec_quantum(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_config_set_exec_quantum(struct xe_gt *gt, unsigned int vfid, u32 exec_quantum);
u32 xe_gt_sriov_pf_config_get_exec_quantum_locked(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_config_set_exec_quantum_locked(struct xe_gt *gt, unsigned int vfid,
u32 exec_quantum);
u32 xe_gt_sriov_pf_config_get_preempt_timeout(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_config_set_preempt_timeout(struct xe_gt *gt, unsigned int vfid,
u32 preempt_timeout);