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| author | Andrew Lewycky | 2014-07-17 00:37:30 +0200 |
|---|---|---|
| committer | Oded Gabbay | 2015-05-19 11:13:39 +0200 |
| commit | 2249d55827c9e5d5731d7a8622ecd366d8756bbb (patch) | |
| tree | 1282a1d544b64ef704c826d677cefef71f8ba048 /drivers/gpu/drm/amd/amdkfd/kfd_priv.h | |
| parent | drm/radeon: Add init interrupt kfd->kgd interface (diff) | |
| download | kernel-qcow2-linux-2249d55827c9e5d5731d7a8622ecd366d8756bbb.tar.gz kernel-qcow2-linux-2249d55827c9e5d5731d7a8622ecd366d8756bbb.tar.xz kernel-qcow2-linux-2249d55827c9e5d5731d7a8622ecd366d8756bbb.zip | |
drm/amdkfd: Add interrupt handling module
This patch adds the interrupt handling module, 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.
However, only interrupts that are "wanted" by amdkfd, are copied into
the amdkfd s/w interrupt ring, in order to minimize the chances
for overflow of the ring.
Signed-off-by: Andrew Lewycky <Andrew.Lewycky@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_priv.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index f21fccebd75b..34c766208e8a 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -161,10 +161,23 @@ struct kfd_dev { unsigned int gtt_sa_chunk_size; unsigned int gtt_sa_num_of_chunks; + /* Interrupts */ + 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 */ @@ -555,7 +568,11 @@ 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 */ +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); +bool interrupt_is_wanted(struct kfd_dev *dev, const uint32_t *ih_ring_entry); /* Power Management */ void kgd2kfd_suspend(struct kfd_dev *kfd); |