1 // SPDX-License-Identifier: GPL-2.0
2 /* uio_pci_generic - generic UIO driver for PCI 2.3 devices
11  * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
12  * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
13  * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
14  * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
17  * in the command register. All devices compliant to PCI 2.3 (circa 2002) and
18  * all compliant PCI Express devices should support this bit.
51 	 * Note that there's a non-zero chance doing this will wedge the device  in release()
54 	pci_clear_master(gdev->pdev);  in release()
64 	if (!pci_check_and_mask_intx(gdev->pdev))  in irqhandler()
81 		dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",  in probe()
86 	if (pdev->irq && !pci_intx_mask_supported(pdev))  in probe()
87 		return -ENODEV;  in probe()
89 	gdev = devm_kzalloc(&pdev->dev, sizeof(struct uio_pci_generic_dev), GFP_KERNEL);  in probe()
91 		return -ENOMEM;  in probe()
93 	gdev->info.name = "uio_pci_generic";  in probe()
94 	gdev->info.version = DRIVER_VERSION;  in probe()
95 	gdev->info.release = release;  in probe()
96 	gdev->pdev = pdev;  in probe()
97 	if (pdev->irq && (pdev->irq != IRQ_NOTCONNECTED)) {  in probe()
98 		gdev->info.irq = pdev->irq;  in probe()
99 		gdev->info.irq_flags = IRQF_SHARED;  in probe()
100 		gdev->info.handler = irqhandler;  in probe()
102 		dev_warn(&pdev->dev, "No IRQ assigned to device: "  in probe()
106 	uiomem = &gdev->info.mem[0];  in probe()
108 		struct resource *r = &pdev->resource[i];  in probe()
110 		if (r->flags != (IORESOURCE_SIZEALIGN | IORESOURCE_MEM))  in probe()
113 		if (uiomem >= &gdev->info.mem[MAX_UIO_MAPS]) {  in probe()
115 				&pdev->dev,  in probe()
121 		uiomem->memtype = UIO_MEM_PHYS;  in probe()
122 		uiomem->addr = r->start & PAGE_MASK;  in probe()
123 		uiomem->offs = r->start & ~PAGE_MASK;  in probe()
124 		uiomem->size =  in probe()
125 			(uiomem->offs + resource_size(r) + PAGE_SIZE - 1) &  in probe()
127 		uiomem->name = r->name;  in probe()
131 	while (uiomem < &gdev->info.mem[MAX_UIO_MAPS]) {  in probe()
132 		uiomem->size = 0;  in probe()
136 	return devm_uio_register_device(&pdev->dev, &gdev->info);  in probe()