3  * CDX bus driver.
11  * CDX is a Hardware Architecture designed for AMD FPGA devices. It
19  * The diagram below shows an overview of the CDX architecture:
24  *          |                    CDX device drivers|
26  *          |                        CDX bus       |
28  *          |                     CDX controller   |
68 #include <linux/cdx/cdx_bus.h>
72 #include "cdx.h"
74 /* Default DMA mask for devices on a CDX bus */
78 /* IDA for CDX controllers registered with the CDX bus */
82 /* Debugfs dir for cdx bus */
85 static char *compat_node_name = "xlnx,versal-net-cdx";
90  * cdx_dev_reset - Reset a CDX device
91  * @dev: CDX device
98 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_dev_reset()  local
109 	ret = cdx->ops->dev_configure(cdx, cdx_dev->bus_num,  in cdx_dev_reset()
112 		dev_err(dev, "cdx device reset failed\n");  in cdx_dev_reset()
123  * reset_cdx_device - Reset a CDX device
124  * @dev: CDX device
137  * cdx_unregister_device - Unregister a CDX device
138  * @dev: CDX device
150 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_unregister_device()  local
154 		if (cdx_dev->enabled && cdx->ops->bus_disable)  in cdx_unregister_device()
155 			cdx->ops->bus_disable(cdx, cdx_dev->bus_num);  in cdx_unregister_device()
175 	/* Reset all the devices attached to cdx bus */  in cdx_unregister_devices()
180  * cdx_match_one_device - Tell if a CDX device structure has a matching
181  *			  CDX device id structure
182  * @id: single CDX device id structure to match
183  * @dev: the CDX device structure to match against
202  * cdx_match_id - See if a CDX device matches a given cdx_id table
203  * @ids: array of CDX device ID structures to search in
204  * @dev: the CDX device structure to match against.
206  * Used by a driver to check whether a CDX device is in its list of
227 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_set_master()  local
233 	if (cdx->ops->dev_configure)  in cdx_set_master()
234 		ret = cdx->ops->dev_configure(cdx, cdx_dev->bus_num,  in cdx_set_master()
243 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_clear_master()  local
249 	if (cdx->ops->dev_configure)  in cdx_clear_master()
250 		ret = cdx->ops->dev_configure(cdx, cdx_dev->bus_num,  in cdx_clear_master()
259  * @dev: the cdx device to match against
260  * @drv: the device driver to search for matching cdx device
306 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_probe()  local
313 	if (cdx->msi_domain) {  in cdx_probe()
341 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_shutdown()  local
343 	if (cdx_dev->is_bus && cdx_dev->enabled && cdx->ops->bus_disable)  in cdx_shutdown()
344 		cdx->ops->bus_disable(cdx, cdx_dev->bus_num);  in cdx_shutdown()
353 	struct cdx_controller *cdx = cdx_dev->cdx;  in cdx_dma_configure()  local
357 	ret = of_dma_configure_id(dev, cdx->dev->of_node, 0, &input_id);  in cdx_dma_configure()
435 		/* Reset all the devices attached to cdx bus */  in reset_store()
449 	return sprintf(buf, "cdx:v%04Xd%04Xsv%04Xsd%04Xc%06X\n", cdx_dev->vendor,  in modalias_show()
489 	struct cdx_controller *cdx = cdx_dev->cdx;  in enable_store()  local
499 	if (enable && cdx->ops->bus_enable)  in enable_store()
500 		ret = cdx->ops->bus_enable(cdx, cdx_dev->bus_num);  in enable_store()
501 	else if (!enable && cdx->ops->bus_disable)  in enable_store()
502 		ret = cdx->ops->bus_disable(cdx, cdx_dev->bus_num);  in enable_store()
608 	struct cdx_controller *cdx;  in rescan_store()  local
633 		cdx = platform_get_drvdata(pd);  in rescan_store()
634 		if (cdx && cdx->controller_registered && cdx->ops->scan)  in rescan_store()
635 			cdx->ops->scan(cdx);  in rescan_store()
654 	.name		= "cdx",
705  * cdx_mmap_resource - map a CDX resource into user memory space
712  * Use the regular CDX mapping routines to map a CDX resource into userspace.
794 	struct cdx_controller *cdx = dev_params->cdx;  in cdx_device_add()  local
807 	/* Populate CDX dev params */  in cdx_device_add()
818 	cdx_dev->cdx = dev_params->cdx;  in cdx_device_add()
831 	dev_set_name(&cdx_dev->dev, "cdx-%02x:%02x",  in cdx_device_add()
832 		     ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (cdx_dev->bus_num & CDX_BUS_NUM_MASK)),  in cdx_device_add()
835 	if (cdx->msi_domain) {  in cdx_device_add()
837 		dev_set_msi_domain(&cdx_dev->dev, cdx->msi_domain);  in cdx_device_add()
843 			"cdx device add failed: %d", ret);  in cdx_device_add()
857 					"cdx device resource<%d> file creation failed: %d", i, ret);  in cdx_device_add()
880 struct device *cdx_bus_add(struct cdx_controller *cdx, u8 bus_num)  in cdx_bus_add()  argument
890 	cdx_dev->cdx = cdx;  in cdx_bus_add()
892 	cdx_dev->dev.parent = cdx->dev;  in cdx_bus_add()
898 	dev_set_name(&cdx_dev->dev, "cdx-%02x",  in cdx_bus_add()
899 		     ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (bus_num & CDX_BUS_NUM_MASK)));  in cdx_bus_add()
903 		dev_err(&cdx_dev->dev, "cdx bus device add failed: %d\n", ret);  in cdx_bus_add()
907 	if (cdx->ops->bus_enable) {  in cdx_bus_add()
908 		ret = cdx->ops->bus_enable(cdx, bus_num);  in cdx_bus_add()
910 			dev_err(cdx->dev, "cdx bus enable failed: %d\n", ret);  in cdx_bus_add()
927 int cdx_register_controller(struct cdx_controller *cdx)  in cdx_register_controller()  argument
933 		dev_err(cdx->dev,  in cdx_register_controller()
935 		cdx->id = (u8)MAX_CDX_CONTROLLERS;  in cdx_register_controller()
940 	cdx->id = ret;  in cdx_register_controller()
943 	if (cdx->ops->scan)  in cdx_register_controller()
944 		cdx->ops->scan(cdx);  in cdx_register_controller()
945 	cdx->controller_registered = true;  in cdx_register_controller()
952 void cdx_unregister_controller(struct cdx_controller *cdx)  in cdx_unregister_controller()  argument
954 	if (cdx->id >= MAX_CDX_CONTROLLERS)  in cdx_unregister_controller()
959 	cdx->controller_registered = false;  in cdx_unregister_controller()
960 	device_for_each_child(cdx->dev, NULL, cdx_unregister_device);  in cdx_unregister_controller()
961 	ida_free(&cdx_controller_ida, cdx->id);  in cdx_unregister_controller()