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Date: Thu, 17 Jul 2014 16:29:23 +0300 From: Oded Gabbay <oded.gabbay@....com> To: David Airlie <airlied@...ux.ie>, Jerome Glisse <j.glisse@...il.com>, "Alex Deucher" <alexdeucher@...il.com>, Andrew Morton <akpm@...ux-foundation.org> CC: John Bridgman <John.Bridgman@....com>, Joerg Roedel <joro@...tes.org>, Andrew Lewycky <Andrew.Lewycky@....com>, Christian König <deathsimple@...afone.de>, Michel Dänzer <michel.daenzer@....com>, Ben Goz <Ben.Goz@....com>, Alexey Skidanov <Alexey.Skidanov@....com>, Evgeny Pinchuk <Evgeny.Pinchuk@....com>, Ben Goz <ben.goz@....com>, Oded Gabbay <oded.gabbay@....com>, Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com>, <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org> Subject: [PATCH v2 16/25] amdkfd: Add module parameter of scheduling policy From: Ben Goz <ben.goz@....com> This patch adds a new parameter to the amdkfd driver. This parameter enables the user to select the scheduling policy of the CP. The choices are: * CP Scheduling with support for over-subscription * CP Scheduling without support for over-subscription * Without CP Scheduling Signed-off-by: Ben Goz <ben.goz@....com> Signed-off-by: Oded Gabbay <oded.gabbay@....com> --- drivers/gpu/drm/radeon/amdkfd/kfd_module.c | 4 ++++ drivers/gpu/drm/radeon/amdkfd/kfd_priv.h | 9 +++++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_module.c b/drivers/gpu/drm/radeon/amdkfd/kfd_module.c index dc08f51..fe5e39d 100644 --- a/drivers/gpu/drm/radeon/amdkfd/kfd_module.c +++ b/drivers/gpu/drm/radeon/amdkfd/kfd_module.c @@ -46,6 +46,10 @@ static const struct kgd2kfd_calls kgd2kfd = { .resume = kgd2kfd_resume, }; +int sched_policy = KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION; +module_param(sched_policy, int, S_IRUSR | S_IWUSR); +MODULE_PARM_DESC(sched_policy, "Kernel cmdline parameter define the kfd scheduling policy"); + bool kgd2kfd_init(unsigned interface_version, const struct kfd2kgd_calls *f2g, const struct kgd2kfd_calls **g2f) diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h index 25f23c5..8be07a1 100644 --- a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h @@ -64,6 +64,15 @@ /* Macro for allocating structures */ #define kfd_alloc_struct(ptr_to_struct) ((typeof(ptr_to_struct)) kzalloc(sizeof(*ptr_to_struct), GFP_KERNEL)) +/* Kernel module parameter to specify the scheduling policy */ +extern int sched_policy; + +enum kfd_sched_policy { + KFD_SCHED_POLICY_HWS = 0, + KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION, + KFD_SCHED_POLICY_NO_HWS +}; + /* * Large enough to hold the maximum usable pasid + 1. * It must also be able to store the number of doorbells -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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