diff options
Diffstat (limited to 'drivers/dma/idxd/sysfs.c')
| -rw-r--r-- | drivers/dma/idxd/sysfs.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index b6a0a59b500f..f5e3f962ee6a 100644 --- a/drivers/dma/idxd/sysfs.c +++ b/drivers/dma/idxd/sysfs.c @@ -55,6 +55,14 @@ static inline bool is_idxd_wq_dev(struct device *dev) return dev ? dev->type == &idxd_wq_device_type : false; } +static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq) +{ + if (wq->type == IDXD_WQT_KERNEL && + strcmp(wq->name, "dmaengine") == 0) + return true; + return false; +} + static int idxd_config_bus_match(struct device *dev, struct device_driver *drv) { @@ -122,6 +130,12 @@ static int idxd_config_bus_probe(struct device *dev) spin_unlock_irqrestore(&idxd->dev_lock, flags); dev_info(dev, "Device %s enabled\n", dev_name(dev)); + rc = idxd_register_dma_device(idxd); + if (rc < 0) { + spin_unlock_irqrestore(&idxd->dev_lock, flags); + dev_dbg(dev, "Failed to register dmaengine device\n"); + return rc; + } return 0; } else if (is_idxd_wq_dev(dev)) { struct idxd_wq *wq = confdev_to_wq(dev); @@ -194,6 +208,16 @@ static int idxd_config_bus_probe(struct device *dev) wq->client_count = 0; dev_info(dev, "wq %s enabled\n", dev_name(&wq->conf_dev)); + + if (is_idxd_wq_dmaengine(wq)) { + rc = idxd_register_dma_channel(wq); + if (rc < 0) { + dev_dbg(dev, "DMA channel register failed\n"); + mutex_unlock(&wq->wq_lock); + return rc; + } + } + mutex_unlock(&wq->wq_lock); return 0; } @@ -215,6 +239,9 @@ static void disable_wq(struct idxd_wq *wq) return; } + if (is_idxd_wq_dmaengine(wq)) + idxd_unregister_dma_channel(wq); + if (idxd_wq_refcount(wq)) dev_warn(dev, "Clients has claim on wq %d: %d\n", wq->id, idxd_wq_refcount(wq)); @@ -264,6 +291,7 @@ static int idxd_config_bus_remove(struct device *dev) device_release_driver(&wq->conf_dev); } + idxd_unregister_dma_device(idxd); spin_lock_irqsave(&idxd->dev_lock, flags); rc = idxd_device_disable(idxd); spin_unlock_irqrestore(&idxd->dev_lock, flags); |