diff options
| author | Abhijit Gangurde <abhijit.gangurde@amd.com> | 2023-12-22 12:16:27 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-04 17:01:13 +0100 |
| commit | cf60af04edfe51fca488246c9959904adb2750fa (patch) | |
| tree | 007cd12056dcaabb83594f878174f95dfee3759c | |
| parent | aeda33ab8160c7a2e24ba4f44492ad1e974ddc7d (diff) | |
cdx: Create resource debugfs file for cdx device
resource debugfs file contains host addresses of CDX device resources.
Each line of the resource file describe type of resource, a region
with start-end and flag fields.
Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Link: https://lore.kernel.org/r/20231222064627.2828960-2-abhijit.gangurde@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/cdx/cdx.c | 39 | ||||
| -rw-r--r-- | include/linux/cdx/cdx_bus.h | 2 |
2 files changed, 40 insertions, 1 deletions
diff --git a/drivers/cdx/cdx.c b/drivers/cdx/cdx.c index 2ec1846ff063..c0fca63c7434 100644 --- a/drivers/cdx/cdx.c +++ b/drivers/cdx/cdx.c @@ -67,6 +67,7 @@ #include <linux/cdx/cdx_bus.h> #include <linux/iommu.h> #include <linux/dma-map-ops.h> +#include <linux/debugfs.h> #include "cdx.h" /* Default DMA mask for devices on a CDX bus */ @@ -77,6 +78,8 @@ static DEFINE_IDA(cdx_controller_ida); /* Lock to protect controller ops */ static DEFINE_MUTEX(cdx_controller_lock); +/* Debugfs dir for cdx bus */ +static struct dentry *cdx_debugfs_dir; static char *compat_node_name = "xlnx,versal-net-cdx"; @@ -151,6 +154,7 @@ static int cdx_unregister_device(struct device *dev, cdx->ops->bus_disable(cdx, cdx_dev->bus_num); } else { cdx_destroy_res_attr(cdx_dev, MAX_CDX_DEV_RESOURCES); + debugfs_remove_recursive(cdx_dev->debugfs_dir); kfree(cdx_dev->driver_override); cdx_dev->driver_override = NULL; } @@ -554,6 +558,31 @@ static const struct attribute_group *cdx_dev_groups[] = { NULL, }; +static int cdx_debug_resource_show(struct seq_file *s, void *data) +{ + struct cdx_device *cdx_dev = s->private; + int i; + + for (i = 0; i < MAX_CDX_DEV_RESOURCES; i++) { + struct resource *res = &cdx_dev->res[i]; + + seq_printf(s, "%pr\n", res); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(cdx_debug_resource); + +static void cdx_device_debugfs_init(struct cdx_device *cdx_dev) +{ + cdx_dev->debugfs_dir = debugfs_create_dir(dev_name(&cdx_dev->dev), cdx_debugfs_dir); + if (IS_ERR(cdx_dev->debugfs_dir)) + return; + + debugfs_create_file("resource", 0444, cdx_dev->debugfs_dir, cdx_dev, + &cdx_debug_resource_fops); +} + static ssize_t rescan_store(const struct bus_type *bus, const char *buf, size_t count) { @@ -803,6 +832,8 @@ int cdx_device_add(struct cdx_dev_params *dev_params) } } + cdx_device_debugfs_init(cdx_dev); + return 0; resource_create_fail: cdx_destroy_res_attr(cdx_dev, i); @@ -907,6 +938,12 @@ EXPORT_SYMBOL_NS_GPL(cdx_unregister_controller, CDX_BUS_CONTROLLER); static int __init cdx_bus_init(void) { - return bus_register(&cdx_bus_type); + int ret; + + ret = bus_register(&cdx_bus_type); + if (!ret) + cdx_debugfs_dir = debugfs_create_dir(cdx_bus_type.name, NULL); + + return ret; } postcore_initcall(cdx_bus_init); diff --git a/include/linux/cdx/cdx_bus.h b/include/linux/cdx/cdx_bus.h index fab9e62c7e7d..6355a36a3f81 100644 --- a/include/linux/cdx/cdx_bus.h +++ b/include/linux/cdx/cdx_bus.h @@ -113,6 +113,7 @@ struct cdx_controller { * @dev_num: Device number for this device * @res: array of MMIO region entries * @res_attr: resource binary attribute + * @debugfs_dir: debugfs directory for this device * @res_count: number of valid MMIO regions * @dma_mask: Default DMA mask * @flags: CDX device flags @@ -136,6 +137,7 @@ struct cdx_device { u8 dev_num; struct resource res[MAX_CDX_DEV_RESOURCES]; struct bin_attribute *res_attr[MAX_CDX_DEV_RESOURCES]; + struct dentry *debugfs_dir; u8 res_count; u64 dma_mask; u16 flags; |