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>
26 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
27 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };	/* reserve (don't use) some DMA */
28 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
29 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some memory region */
44 	option->flags = option_flags;  in pnp_build_option()
45 	option->type = type;  in pnp_build_option()
47 	list_add_tail(&option->list, &dev->options);  in pnp_build_option()
59 		return -ENOMEM;  in pnp_register_irq_resource()
61 	irq = &option->u.irq;  in pnp_register_irq_resource()
62 	irq->map = *map;  in pnp_register_irq_resource()
63 	irq->flags = flags;  in pnp_register_irq_resource()
70 			if (test_bit(i, irq->map.bits))  in pnp_register_irq_resource()
83 	struct pnp_dma *dma;  in pnp_register_dma_resource()  local
87 		return -ENOMEM;  in pnp_register_dma_resource()
89 	dma = &option->u.dma;  in pnp_register_dma_resource()
90 	dma->map = map;  in pnp_register_dma_resource()
91 	dma->flags = flags;  in pnp_register_dma_resource()
107 		return -ENOMEM;  in pnp_register_port_resource()
109 	port = &option->u.port;  in pnp_register_port_resource()
110 	port->min = min;  in pnp_register_port_resource()
111 	port->max = max;  in pnp_register_port_resource()
112 	port->align = align;  in pnp_register_port_resource()
113 	port->size = size;  in pnp_register_port_resource()
114 	port->flags = flags;  in pnp_register_port_resource()
126 	struct pnp_mem *mem;  in pnp_register_mem_resource()  local
130 		return -ENOMEM;  in pnp_register_mem_resource()
132 	mem = &option->u.mem;  in pnp_register_mem_resource()
133 	mem->min = min;  in pnp_register_mem_resource()
134 	mem->max = max;  in pnp_register_mem_resource()
135 	mem->align = align;  in pnp_register_mem_resource()
136 	mem->size = size;  in pnp_register_mem_resource()
137 	mem->flags = flags;  in pnp_register_mem_resource()
147 	list_for_each_entry_safe(option, tmp, &dev->options, list) {  in pnp_free_options()
148 		list_del(&option->list);  in pnp_free_options()
157 #define length(start, end) (*(end) - *(start) + 1)
173 	port = &res->start;  in pnp_check_port()
174 	end = &res->end;  in pnp_check_port()
177 	if (cannot_compare(res->flags))  in pnp_check_port()
182 	if (!dev->active) {  in pnp_check_port()
191 		int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;  in pnp_check_port()
198 		if (tres != res && tres->flags & IORESOURCE_IO) {  in pnp_check_port()
199 			tport = &tres->start;  in pnp_check_port()
200 			tend = &tres->end;  in pnp_check_port()
213 			if (tres->flags & IORESOURCE_IO) {  in pnp_check_port()
214 				if (cannot_compare(tres->flags))  in pnp_check_port()
216 				if (tres->flags & IORESOURCE_WINDOW)  in pnp_check_port()
218 				tport = &tres->start;  in pnp_check_port()
219 				tend = &tres->end;  in pnp_check_port()
236 	addr = &res->start;  in pnp_check_mem()
237 	end = &res->end;  in pnp_check_mem()
240 	if (cannot_compare(res->flags))  in pnp_check_mem()
245 	if (!dev->active) {  in pnp_check_mem()
254 		int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;  in pnp_check_mem()
261 		if (tres != res && tres->flags & IORESOURCE_MEM) {  in pnp_check_mem()
262 			taddr = &tres->start;  in pnp_check_mem()
263 			tend = &tres->end;  in pnp_check_mem()
276 			if (tres->flags & IORESOURCE_MEM) {  in pnp_check_mem()
277 				if (cannot_compare(tres->flags))  in pnp_check_mem()
279 				if (tres->flags & IORESOURCE_WINDOW)  in pnp_check_mem()
281 				taddr = &tres->start;  in pnp_check_mem()
282 				tend = &tres->end;  in pnp_check_mem()
304 	if (pci->irq == irq) {  in pci_dev_uses_irq()
305 		pnp_dbg(&pnp->dev, "  device %s using irq %d\n",  in pci_dev_uses_irq()
321 		 * Unless both channels are native-PCI mode only,  in pci_dev_uses_irq()
327 				pnp_dbg(&pnp->dev, "  legacy IDE device %s "  in pci_dev_uses_irq()
359 	irq = &res->start;  in pnp_check_irq()
362 	if (cannot_compare(res->flags))  in pnp_check_irq()
377 		if (tres != res && tres->flags & IORESOURCE_IRQ) {  in pnp_check_irq()
378 			if (tres->start == *irq)  in pnp_check_irq()
389 	if (!dev->active) {  in pnp_check_irq()
403 			if (tres->flags & IORESOURCE_IRQ) {  in pnp_check_irq()
404 				if (cannot_compare(tres->flags))  in pnp_check_irq()
406 				if (tres->start == *irq)  in pnp_check_irq()
421 	resource_size_t *dma;  in pnp_check_dma()  local
423 	dma = &res->start;  in pnp_check_dma()
426 	if (cannot_compare(res->flags))  in pnp_check_dma()
430 	if (*dma == 4 || *dma > 7)  in pnp_check_dma()
435 		if (pnp_reserve_dma[i] == *dma)  in pnp_check_dma()
441 		if (tres != res && tres->flags & IORESOURCE_DMA) {  in pnp_check_dma()
442 			if (tres->start == *dma)  in pnp_check_dma()
449 	if (!dev->active) {  in pnp_check_dma()
450 		if (request_dma(*dma, "pnp"))  in pnp_check_dma()
452 		free_dma(*dma);  in pnp_check_dma()
462 			if (tres->flags & IORESOURCE_DMA) {  in pnp_check_dma()
463 				if (cannot_compare(tres->flags))  in pnp_check_dma()
465 				if (tres->start == *dma)  in pnp_check_dma()
477 	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |  in pnp_resource_type()
488 	list_for_each_entry(pnp_res, &dev->resources, list) {  in pnp_get_resource()
489 		res = &pnp_res->res;  in pnp_get_resource()
490 		if (pnp_resource_type(res) == type && num-- == 0)  in pnp_get_resource()
505 	list_add_tail(&pnp_res->list, &dev->resources);  in pnp_new_resource()
516 		dev_err(&dev->dev, "can't add resource %pR\n", res);  in pnp_add_resource()
520 	pnp_res->res = *res;  in pnp_add_resource()
521 	pnp_res->res.name = dev->name;  in pnp_add_resource()
522 	dev_dbg(&dev->dev, "%pR\n", res);  in pnp_add_resource()
534 		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);  in pnp_add_irq_resource()
538 	res = &pnp_res->res;  in pnp_add_irq_resource()
539 	res->flags = IORESOURCE_IRQ | flags;  in pnp_add_irq_resource()
540 	res->start = irq;  in pnp_add_irq_resource()
541 	res->end = irq;  in pnp_add_irq_resource()
543 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_irq_resource()
547 struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,  in pnp_add_dma_resource()  argument
555 		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);  in pnp_add_dma_resource()
559 	res = &pnp_res->res;  in pnp_add_dma_resource()
560 	res->flags = IORESOURCE_DMA | flags;  in pnp_add_dma_resource()
561 	res->start = dma;  in pnp_add_dma_resource()
562 	res->end = dma;  in pnp_add_dma_resource()
564 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_dma_resource()
577 		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",  in pnp_add_io_resource()
583 	res = &pnp_res->res;  in pnp_add_io_resource()
584 	res->flags = IORESOURCE_IO | flags;  in pnp_add_io_resource()
585 	res->start = start;  in pnp_add_io_resource()
586 	res->end = end;  in pnp_add_io_resource()
588 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_io_resource()
601 		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",  in pnp_add_mem_resource()
607 	res = &pnp_res->res;  in pnp_add_mem_resource()
608 	res->flags = IORESOURCE_MEM | flags;  in pnp_add_mem_resource()
609 	res->start = start;  in pnp_add_mem_resource()
610 	res->end = end;  in pnp_add_mem_resource()
612 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_mem_resource()
625 		dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",  in pnp_add_bus_resource()
631 	res = &pnp_res->res;  in pnp_add_bus_resource()
632 	res->flags = IORESOURCE_BUS;  in pnp_add_bus_resource()
633 	res->start = start;  in pnp_add_bus_resource()
634 	res->end = end;  in pnp_add_bus_resource()
636 	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);  in pnp_add_bus_resource()
649 	struct pnp_mem *mem;  in pnp_possible_config()  local
651 	struct pnp_dma *dma;  in pnp_possible_config()  local
653 	list_for_each_entry(option, &dev->options, list) {  in pnp_possible_config()
654 		if (option->type != type)  in pnp_possible_config()
657 		switch (option->type) {  in pnp_possible_config()
659 			port = &option->u.port;  in pnp_possible_config()
660 			if (port->min == start && port->size == size)  in pnp_possible_config()
664 			mem = &option->u.mem;  in pnp_possible_config()
665 			if (mem->min == start && mem->size == size)  in pnp_possible_config()
669 			irq = &option->u.irq;  in pnp_possible_config()
671 			    test_bit(start, irq->map.bits))  in pnp_possible_config()
675 			dma = &option->u.dma;  in pnp_possible_config()
676 			if (dma->map & (1 << start))  in pnp_possible_config()
693 		list_for_each_entry(pnp_res, &dev->resources, list) {  in pnp_range_reserved()
694 			dev_start = &pnp_res->res.start;  in pnp_range_reserved()
695 			dev_end   = &pnp_res->res.end;  in pnp_range_reserved()