diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2021-04-20 11:46:34 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-04-23 23:08:45 +0530 |
| commit | eb15e7154fbfa3e61c777704b2ff28eb3a0d4796 (patch) | |
| tree | f2c2c47e31889fa586520f0a84628936fefb6d1c /drivers/dma/idxd/idxd.h | |
| parent | 8c66bbdc4fbf3c297ebc8edf71f359e4a132c9db (diff) | |
dmaengine: idxd: add interrupt handle request and release support
DSA spec states that when Request Interrupt Handle and Release Interrupt
Handle command bits are set in the CMDCAP register, these device commands
must be supported by the driver.
The interrupt handle is programmed in a descriptor. When Request Interrupt
Handle is not supported, the interrupt handle is the index of the desired
entry in the MSI-X table. When the command is supported, driver must use
the command to obtain a handle to be programmed in the submitted
descriptor.
A requested handle may be revoked. After the handle is revoked, any use of
the handle will result in Invalid Interrupt Handle error.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894439422.3202472.17579543737810265471.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/idxd.h')
| -rw-r--r-- | drivers/dma/idxd/idxd.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 940a2e1ddf12..c1d4a1976206 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -160,6 +160,7 @@ struct idxd_hw { union group_cap_reg group_cap; union engine_cap_reg engine_cap; struct opcap opcap; + u32 cmd_cap; }; enum idxd_device_state { @@ -237,6 +238,8 @@ struct idxd_device { struct idxd_dma_dev *idxd_dma; struct workqueue_struct *wq; struct work_struct work; + + int *int_handles; }; /* IDXD software descriptor */ @@ -256,6 +259,7 @@ struct idxd_desc { struct list_head list; int id; int cpu; + unsigned int vector; struct idxd_wq *wq; }; @@ -330,6 +334,11 @@ enum idxd_portal_prot { IDXD_PORTAL_LIMITED, }; +enum idxd_interrupt_type { + IDXD_IRQ_MSIX = 0, + IDXD_IRQ_IMS, +}; + static inline int idxd_get_wq_portal_offset(enum idxd_portal_prot prot) { return prot * 0x1000; @@ -385,6 +394,10 @@ int idxd_device_config(struct idxd_device *idxd); void idxd_device_wqs_clear_state(struct idxd_device *idxd); void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid); int idxd_device_load_config(struct idxd_device *idxd); +int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle, + enum idxd_interrupt_type irq_type); +int idxd_device_release_int_handle(struct idxd_device *idxd, int handle, + enum idxd_interrupt_type irq_type); /* work queue control */ int idxd_wq_alloc_resources(struct idxd_wq *wq); |