diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2020-01-21 16:44:05 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-01-24 11:18:45 +0530 |
| commit | c52ca478233c172b2d322b5241d6279a8661cbba (patch) | |
| tree | 7006d7e739952f598ff1a308239d2b794fc2cd22 /drivers/dma/idxd/idxd.h | |
| parent | bfe1d56091c1a404b3d4ce7e9809d745fc4453bb (diff) | |
| download | lwn-c52ca478233c172b2d322b5241d6279a8661cbba.tar.gz lwn-c52ca478233c172b2d322b5241d6279a8661cbba.zip | |
dmaengine: idxd: add configuration component of driver
The device is left unconfigured when the driver is loaded. Various
components are configured via the driver sysfs attributes. Once
configuration is done, the device can be enabled by writing the device name
to the bind attribute of the device driver sysfs. Disabling can be done
similarly. Also the individual work queues can also be enabled and disabled
through the bind/unbind attributes. A constructed hierarchy is created
through the struct device framework in order to provide appropriate
configuration points and device state and status. This hierarchy is
presented off the virtual DSA bus.
i.e. /sys/bus/dsa/...
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/157965024585.73301.6431413676230150589.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 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h index 733484922365..909926aefd3e 100644 --- a/drivers/dma/idxd/idxd.h +++ b/drivers/dma/idxd/idxd.h @@ -157,6 +157,7 @@ struct idxd_device { int max_wqs; int max_wq_size; int token_limit; + int nr_tokens; /* non-reserved tokens */ union sw_err_reg sw_err; @@ -195,7 +196,28 @@ static inline void idxd_set_type(struct idxd_device *idxd) idxd->type = IDXD_TYPE_UNKNOWN; } +static inline void idxd_wq_get(struct idxd_wq *wq) +{ + wq->client_count++; +} + +static inline void idxd_wq_put(struct idxd_wq *wq) +{ + wq->client_count--; +} + +static inline int idxd_wq_refcount(struct idxd_wq *wq) +{ + return wq->client_count; +}; + const char *idxd_get_dev_name(struct idxd_device *idxd); +int idxd_register_bus_type(void); +void idxd_unregister_bus_type(void); +int idxd_setup_sysfs(struct idxd_device *idxd); +void idxd_cleanup_sysfs(struct idxd_device *idxd); +int idxd_register_driver(void); +void idxd_unregister_driver(void); /* device interrupt control */ irqreturn_t idxd_irq_handler(int vec, void *data); @@ -221,5 +243,7 @@ int idxd_wq_alloc_resources(struct idxd_wq *wq); void idxd_wq_free_resources(struct idxd_wq *wq); int idxd_wq_enable(struct idxd_wq *wq); int idxd_wq_disable(struct idxd_wq *wq); +int idxd_wq_map_portal(struct idxd_wq *wq); +void idxd_wq_unmap_portal(struct idxd_wq *wq); #endif |