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| author | Andrew Lewycky <Andrew.Lewycky@amd.com> | 2014-07-17 02:37:30 +0400 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@amd.com> | 2014-07-17 02:37:30 +0400 |
| commit | b3f5e6b4412e69ebd7094c51aa345188a30a5cbe (patch) | |
| tree | 7179f70691224e8c26c542794a5b40a5a234526b /drivers/gpu/drm/amd/amdkfd/kfd_priv.h | |
| parent | 64c7f8cf792776aaca036fb983006b6b21204934 (diff) | |
| download | linux-b3f5e6b4412e69ebd7094c51aa345188a30a5cbe.tar.xz | |
amdkfd: Add interrupt handling module
This patch adds the interrupt handling module, in kfd_interrupt.c, and its
related members in different data structures to the amdkfd driver.
The amdkfd interrupt module maintains an internal interrupt ring per amdkfd
device. The internal interrupt ring contains interrupts that needs further
handling. The extra handling is deferred to a later time through a workqueue.
There's no acknowledgment for the interrupts we use. The hardware simply queues
a new interrupt each time without waiting.
The fixed-size internal queue means that it's possible for us to lose
interrupts because we have no back-pressure to the hardware.
v3:
Move amdkfd from drm/radeon/ to drm/amd/
Change device init
Made sure spin lock is taken only if init is complete
Moved bool field to the end of the structure
Signed-off-by: Andrew Lewycky <Andrew.Lewycky@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_priv.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 7f3b4fdaa26e..2bc34aa1ad95 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -135,10 +135,22 @@ struct kfd_dev { struct kgd2kfd_shared_resources shared_resources; + void *interrupt_ring; + size_t interrupt_ring_size; + atomic_t interrupt_ring_rptr; + atomic_t interrupt_ring_wptr; + struct work_struct interrupt_work; + spinlock_t interrupt_lock; + /* QCM Device instance */ struct device_queue_manager *dqm; bool init_complete; + /* + * Interrupts of interest to KFD are copied + * from the HW ring into a SW ring. + */ + bool interrupts_active; }; /* KGD2KFD callbacks */ @@ -493,11 +505,14 @@ struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev); struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx); /* Interrupts */ -void kgd2kfd_interrupt(struct kfd_dev *dev, const void *ih_ring_entry); +int kfd_interrupt_init(struct kfd_dev *dev); +void kfd_interrupt_exit(struct kfd_dev *dev); +void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry); +bool enqueue_ih_ring_entry(struct kfd_dev *kfd, const void *ih_ring_entry); /* Power Management */ -void kgd2kfd_suspend(struct kfd_dev *dev); -int kgd2kfd_resume(struct kfd_dev *dev); +void kgd2kfd_suspend(struct kfd_dev *kfd); +int kgd2kfd_resume(struct kfd_dev *kfd); /* amdkfd Apertures */ int kfd_init_apertures(struct kfd_process *process); |