diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c index a05116b0a07d5..95d5af138e6e7 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c @@ -45,6 +45,11 @@ static const struct kgd2kfd_calls kgd2kfd = { .resume = kgd2kfd_resume, }; +int sched_policy = KFD_SCHED_POLICY_HWS; +module_param(sched_policy, int, 0444); +MODULE_PARM_DESC(sched_policy, + "Kernel cmdline parameter that defines the amdkfd scheduling policy"); + int max_num_of_processes = KFD_MAX_NUM_OF_PROCESSES_DEFAULT; module_param(max_num_of_processes, int, 0444); MODULE_PARM_DESC(max_num_of_processes, @@ -87,6 +92,13 @@ static int __init kfd_module_init(void) kfd2kgd = NULL; + /* Verify module parameters */ + if ((sched_policy < KFD_SCHED_POLICY_HWS) || + (sched_policy > KFD_SCHED_POLICY_NO_HWS)) { + pr_err("kfd: sched_policy has invalid value\n"); + return -1; + } + /* Verify module parameters */ if ((max_num_of_processes < 0) || (max_num_of_processes > KFD_MAX_NUM_OF_PROCESSES)) { diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index bba3c2ada2611..32bca8a674235 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -69,6 +69,36 @@ extern int max_num_of_queues_per_process; #define KFD_KERNEL_QUEUE_SIZE 2048 +/* Kernel module parameter to specify the scheduling policy */ +extern int sched_policy; + +/** + * enum kfd_sched_policy + * + * @KFD_SCHED_POLICY_HWS: H/W scheduling policy known as command processor (cp) + * scheduling. In this scheduling mode we're using the firmware code to + * schedule the user mode queues and kernel queues such as HIQ and DIQ. + * the HIQ queue is used as a special queue that dispatches the configuration + * to the cp and the user mode queues list that are currently running. + * the DIQ queue is a debugging queue that dispatches debugging commands to the + * firmware. + * in this scheduling mode user mode queues over subscription feature is + * enabled. + * + * @KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION: The same as above but the over + * subscription feature disabled. + * + * @KFD_SCHED_POLICY_NO_HWS: no H/W scheduling policy is a mode which directly + * set the command processor registers and sets the queues "manually". This + * mode is used *ONLY* for debugging proposes. + * + */ +enum kfd_sched_policy { + KFD_SCHED_POLICY_HWS = 0, + KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION, + KFD_SCHED_POLICY_NO_HWS +}; + enum cache_policy { cache_policy_coherent, cache_policy_noncoherent