1 // SPDX-License-Identifier: GPL-2.0
3  * resource.c - Contains functions for registering and analyzing resource information
7  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
17 #include <asm/dma.h>
27 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
28 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };	/* reserve (don't use) some DMA */
29 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
30 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some memory region */
45 	option->flags = option_flags;  in pnp_build_option()
46 	option->type = type;  in pnp_build_option()
48 	list_add_tail(&option->list, &dev->options);  in pnp_build_option()
60 		return -ENOMEM;  in pnp_register_irq_resource()
62 	irq = &option->u.irq;  in pnp_register_irq_resource()
63 	irq->map = *map;  in pnp_register_irq_resource()
64 	irq->flags = flags;  in pnp_register_irq_resource()
71 			if (test_bit(i, irq->map.bits))  in pnp_register_irq_resource()
84 	struct pnp_dma *dma;  in pnp_register_dma_resource()  local
88 		return -ENOMEM;  in pnp_register_dma_resource()
90 	dma = &option->u.dma;  in pnp_register_dma_resource()
91 	dma->map = map;  in pnp_register_dma_resource()
92 	dma->flags = flags;  in pnp_register_dma_resource()
108 		return -ENOMEM;  in pnp_register_port_resource()
110 	port = &option->u.port;  in pnp_register_port_resource()
111 	port->min = min;  in pnp_register_port_resource()
112 	port->max = max;  in pnp_register_port_resource()
113 	port->align = align;  in pnp_register_port_resource()
114 	port->size = size;  in pnp_register_port_resource()
115 	port->flags = flags;  in pnp_register_port_resource()
127 	struct pnp_mem *mem;  in pnp_register_mem_resource()  local
131 		return -ENOMEM;  in pnp_register_mem_resource()
133 	mem = &option->u.mem;  in pnp_register_mem_resource()
134 	mem->min = min;  in pnp_register_mem_resource()
135 	mem->max = max;  in pnp_register_mem_resource()
136 	mem->align = align;  in pnp_register_mem_resource()
137 	mem->size = size;  in pnp_register_mem_resource()
138 	mem->flags = flags;  in pnp_register_mem_resource()
148 	list_for_each_entry_safe(option, tmp, &dev->options, list) {  in pnp_free_options()
149 		list_del(&option->list);  in pnp_free_options()
158 #define length(start, end) (*(end) - *(start) + 1)
174 	port = &res->start;  in pnp_check_port()
175 	end = &res->end;  in pnp_check_port()
178 	if (cannot_compare(res->flags))  in pnp_check_port()
183 	if (!dev->active) {  in pnp_check_port()
192 		int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;  in pnp_check_port()
199 		if (tres != res && tres->flags & IORESOURCE_IO) {  in pnp_check_port()
200 			tport = &tres->start;  in pnp_check_port()
201 			tend = &tres->end;  in pnp_check_port()
214 			if (tres->flags & IORESOURCE_IO) {  in pnp_check_port()
215 				if (cannot_compare(tres->flags))  in pnp_check_port()
217 				if (tres->flags & IORESOURCE_WINDOW)  in pnp_check_port()
219 				tport = &tres->start;  in pnp_check_port()
220 				tend = &tres->end;  in pnp_check_port()
237 	addr = &res->start;  in pnp_check_mem()
238 	end = &res->end;  in pnp_check_mem()
241 	if (cannot_compare(res->flags))  in pnp_check_mem()
246 	if (!dev->active) {  in pnp_check_mem()
255 		int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;  in pnp_check_mem()
262 		if (tres != res && tres->flags & IORESOURCE_MEM) {  in pnp_check_mem()
263 			taddr = &tres->start;  in pnp_check_mem()
264 			tend = &tres->end;  in pnp_check_mem()
277 			if (tres->flags & IORESOURCE_MEM) {  in pnp_check_mem()
278 				if (cannot_compare(tres->flags))  in pnp_check_mem()
280 				if (tres->flags & IORESOURCE_WINDOW)  in pnp_check_mem()
282 				taddr = &tres->start;  in pnp_check_mem()
283 				tend = &tres->end;  in pnp_check_mem()
305 	if (pci->irq == irq) {  in pci_dev_uses_irq()
306 		pnp_dbg(&pnp->dev, "  device %s using irq %d\n",  in pci_dev_uses_irq()
322 		 * Unless both channels are native-PCI mode only,  in pci_dev_uses_irq()
328 				pnp_dbg(&pnp->dev, "  legacy IDE device %s "  in pci_dev_uses_irq()
360 	irq = &res->start;  in pnp_check_irq()
363 	if (cannot_compare(res->flags))  in pnp_check_irq()
378 		if (tres != res && tres->flags & IORESOURCE_IRQ) {  in pnp_check_irq()
379 			if (tres->start == *irq)  in pnp_check_irq()
390 	if (!dev->active) {  in pnp_check_irq()
404 			if (tres->flags & IORESOURCE_IRQ) {  in pnp_check_irq()
405 				if (cannot_compare(tres->flags))  in pnp_check_irq()
407 				if (tres->start == *irq)  in pnp_check_irq()
422 	resource_size_t *dma;  in pnp_check_dma()  local
424 	dma = &res->start;  in pnp_check_dma()
427 	if (cannot_compare(res->flags))  in pnp_check_dma()
431 	if (*dma == 4 || *dma > 7)  in pnp_check_dma()
436 		if (pnp_reserve_dma[i] == *dma)  in pnp_check_dma()
442 		if (tres != res && tres->flags & IORESOURCE_DMA) {  in pnp_check_dma()
443 			if (tres->start == *dma)  in pnp_check_dma()
450 	if (!dev->active) {  in pnp_check_dma()
451 		if (request_dma(*dma, "pnp"))  in pnp_check_dma()
453 		free_dma(*dma);  in pnp_check_dma()
463 			if (tres->flags & IORESOURCE_DMA) {  in pnp_check_dma()
464 				if (cannot_compare(tres->flags))  in pnp_check_dma()
466 				if (tres->start == *dma)  in pnp_check_dma()
478 	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |  in pnp_resource_type()
489 	list_for_each_entry(pnp_res, &dev->resources, list) {  in pnp_get_resource()
490 		res = &pnp_res->res;  in pnp_get_resource()
491 		if (pnp_resource_type(res) == type && num-- == 0)  in pnp_get_resource()
506 	list_add_tail(&pnp_res->list, &dev->resources);  in pnp_new_resource()
517 		dev_err(&dev->dev, "can't add resource %pR\n", res);  in pnp_add_resource()
521 	pnp_res->res = *res;  in pnp_add_resource()
522 	pnp_res->res.name = dev->name;  in pnp_add_resource()
523 	dev_dbg(&dev->dev, "%pR\n", res);  in pnp_add_resource()
535 		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);  in pnp_add_irq_resource()
539 	res = &pnp_res->res;  in pnp_add_irq_resource()
540 	res->flags = IORESOURCE_IRQ | flags;  in pnp_add_irq_resource()
541 	res->start = irq;  in pnp_add_irq_resource()
542 	res->end = irq;  in pnp_add_irq_resource()
544 	dev_dbg(&dev->dev, "%pR\n", res);  in pnp_add_irq_resource()
548 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,  in pnp_add_dma_resource()  argument
556 		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);  in pnp_add_dma_resource()
560 	res = &pnp_res->res;  in pnp_add_dma_resource()
561 	res->flags = IORESOURCE_DMA | flags;  in pnp_add_dma_resource()
562 	res->start = dma;  in pnp_add_dma_resource()
563 	res->end = dma;  in pnp_add_dma_resource()
565 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_dma_resource()
578 		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",  in pnp_add_io_resource()
584 	res = &pnp_res->res;  in pnp_add_io_resource()
585 	res->flags = IORESOURCE_IO | flags;  in pnp_add_io_resource()
586 	res->start = start;  in pnp_add_io_resource()
587 	res->end = end;  in pnp_add_io_resource()
589 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_io_resource()
602 		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",  in pnp_add_mem_resource()
608 	res = &pnp_res->res;  in pnp_add_mem_resource()
609 	res->flags = IORESOURCE_MEM | flags;  in pnp_add_mem_resource()
610 	res->start = start;  in pnp_add_mem_resource()
611 	res->end = end;  in pnp_add_mem_resource()
613 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_mem_resource()
626 		dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",  in pnp_add_bus_resource()
632 	res = &pnp_res->res;  in pnp_add_bus_resource()
633 	res->flags = IORESOURCE_BUS;  in pnp_add_bus_resource()
634 	res->start = start;  in pnp_add_bus_resource()
635 	res->end = end;  in pnp_add_bus_resource()
637 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_bus_resource()
650 	struct pnp_mem *mem;  in pnp_possible_config()  local
652 	struct pnp_dma *dma;  in pnp_possible_config()  local
654 	list_for_each_entry(option, &dev->options, list) {  in pnp_possible_config()
655 		if (option->type != type)  in pnp_possible_config()
658 		switch (option->type) {  in pnp_possible_config()
660 			port = &option->u.port;  in pnp_possible_config()
661 			if (port->min == start && port->size == size)  in pnp_possible_config()
665 			mem = &option->u.mem;  in pnp_possible_config()
666 			if (mem->min == start && mem->size == size)  in pnp_possible_config()
670 			irq = &option->u.irq;  in pnp_possible_config()
672 			    test_bit(start, irq->map.bits))  in pnp_possible_config()
676 			dma = &option->u.dma;  in pnp_possible_config()
677 			if (dma->map & (1 << start))  in pnp_possible_config()
694 		list_for_each_entry(pnp_res, &dev->resources, list) {  in pnp_range_reserved()
695 			dev_start = &pnp_res->res.start;  in pnp_range_reserved()
696 			dev_end   = &pnp_res->res.end;  in pnp_range_reserved()