diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2020-01-21 16:44:23 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-01-24 11:18:45 +0530 |
| commit | 8f47d1a5e545f903cd049c42da31a3be36178447 (patch) | |
| tree | 0a28a5b686d0fe2576b971edf1a2282ba66814ce /drivers/dma/idxd/sysfs.c | |
| parent | d1dfe5b8ac644a0ffccfe7af22abed7c80b34702 (diff) | |
dmaengine: idxd: connect idxd to dmaengine subsystem
Add plumbing for dmaengine subsystem connection. The driver register a DMA
device per DSA device. The channels are dynamically registered when a
workqueue is configured to be "kernel:dmanegine" type.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/157965026376.73301.13867988830650740445.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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); |