diff options
Diffstat (limited to 'drivers/cdx')
| -rw-r--r-- | drivers/cdx/cdx.c | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c index d2cad4c670a0..0252fc92433d 100644 --- a/drivers/cdx/cdx.c +++ b/drivers/cdx/cdx.c @@ -60,7 +60,7 @@ #include <linux/of_device.h> #include <linux/slab.h> #include <linux/mm.h> -#include <linux/xarray.h> +#include <linux/idr.h> #include <linux/cdx/cdx_bus.h> #include <linux/iommu.h> #include <linux/dma-map-ops.h> @@ -70,8 +70,10 @@ #define CDX_DEFAULT_DMA_MASK (~0ULL) #define MAX_CDX_CONTROLLERS 16 -/* CDX controllers registered with the CDX bus */ -static DEFINE_XARRAY_ALLOC(cdx_controllers); +/* IDA for CDX controllers registered with the CDX bus */ +static DEFINE_IDA(cdx_controller_ida); + +static char *compat_node_name = "xlnx,versal-net-cdx"; /** * cdx_dev_reset - Reset a CDX device @@ -384,7 +386,8 @@ static ssize_t rescan_store(const struct bus_type *bus, const char *buf, size_t count) { struct cdx_controller *cdx; - unsigned long index; + struct platform_device *pd; + struct device_node *np; bool val; if (kstrtobool(buf, &val) < 0) @@ -397,12 +400,19 @@ static ssize_t rescan_store(const struct bus_type *bus, cdx_unregister_devices(&cdx_bus_type); /* Rescan all the devices */ - xa_for_each(&cdx_controllers, index, cdx) { - int ret; + for_each_compatible_node(np, NULL, compat_node_name) { + if (!np) + return -EINVAL; - ret = cdx->ops->scan(cdx); - if (ret) - dev_err(cdx->dev, "cdx bus scanning failed\n"); + pd = of_find_device_by_node(np); + if (!pd) + return -EINVAL; + + cdx = platform_get_drvdata(pd); + if (cdx && cdx->controller_registered && cdx->ops->scan) + cdx->ops->scan(cdx); + + put_device(&pd->dev); } return count; @@ -520,17 +530,20 @@ int cdx_register_controller(struct cdx_controller *cdx) { int ret; - ret = xa_alloc(&cdx_controllers, &cdx->id, cdx, - XA_LIMIT(0, MAX_CDX_CONTROLLERS - 1), GFP_KERNEL); - if (ret) { + ret = ida_alloc_range(&cdx_controller_ida, 0, MAX_CDX_CONTROLLERS - 1, GFP_KERNEL); + if (ret < 0) { dev_err(cdx->dev, "No free index available. Maximum controllers already registered\n"); cdx->id = (u8)MAX_CDX_CONTROLLERS; return ret; } + cdx->id = ret; + /* Scan all the devices */ - cdx->ops->scan(cdx); + if (cdx->ops->scan) + cdx->ops->scan(cdx); + cdx->controller_registered = true; return 0; } @@ -541,8 +554,9 @@ void cdx_unregister_controller(struct cdx_controller *cdx) if (cdx->id >= MAX_CDX_CONTROLLERS) return; + cdx->controller_registered = false; device_for_each_child(cdx->dev, NULL, cdx_unregister_device); - xa_erase(&cdx_controllers, cdx->id); + ida_free(&cdx_controller_ida, cdx->id); } EXPORT_SYMBOL_GPL(cdx_unregister_controller); |