Initial import

1 files changed, 753 insertions, 0 deletions

diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
new file mode 100644
index 000000000..f980ff716
--- /dev/null
+++ b/drivers/pnp/resource.c
@@ -0,0 +1,753 @@
+/*
+ * resource.c - Contains functions for registering and analyzing resource information
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+
+#include <linux/pnp.h>
+#include "base.h"
+
+static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
+static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };	/* reserve (don't use) some DMA */
+static int pnp_reserve_io[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
+static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };	/* reserve (don't use) some memory region */
+
+/*
+ * option registration
+ */
+
+static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
+				    unsigned int option_flags)
+{
+	struct pnp_option *option;
+
+	option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
+	if (!option)
+		return NULL;
+
+	option->flags = option_flags;
+	option->type = type;
+
+	list_add_tail(&option->list, &dev->options);
+	return option;
+}
+
+int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      pnp_irq_mask_t *map, unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_irq *irq;
+
+	option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	irq = &option->u.irq;
+	irq->map = *map;
+	irq->flags = flags;
+
+#ifdef CONFIG_PCI
+	{
+		int i;
+
+		for (i = 0; i < 16; i++)
+			if (test_bit(i, irq->map.bits))
+				pcibios_penalize_isa_irq(i, 0);
+	}
+#endif
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      unsigned char map, unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_dma *dma;
+
+	option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	dma = &option->u.dma;
+	dma->map = map;
+	dma->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
+			       resource_size_t min, resource_size_t max,
+			       resource_size_t align, resource_size_t size,
+			       unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_port *port;
+
+	option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	port = &option->u.port;
+	port->min = min;
+	port->max = max;
+	port->align = align;
+	port->size = size;
+	port->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
+			      resource_size_t min, resource_size_t max,
+			      resource_size_t align, resource_size_t size,
+			      unsigned char flags)
+{
+	struct pnp_option *option;
+	struct pnp_mem *mem;
+
+	option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
+	if (!option)
+		return -ENOMEM;
+
+	mem = &option->u.mem;
+	mem->min = min;
+	mem->max = max;
+	mem->align = align;
+	mem->size = size;
+	mem->flags = flags;
+
+	dbg_pnp_show_option(dev, option);
+	return 0;
+}
+
+void pnp_free_options(struct pnp_dev *dev)
+{
+	struct pnp_option *option, *tmp;
+
+	list_for_each_entry_safe(option, tmp, &dev->options, list) {
+		list_del(&option->list);
+		kfree(option);
+	}
+}
+
+/*
+ * resource validity checking
+ */
+
+#define length(start, end) (*(end) - *(start) + 1)
+
+/* Two ranges conflict if one doesn't end before the other starts */
+#define ranged_conflict(starta, enda, startb, endb) \
+	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
+
+#define cannot_compare(flags) \
+((flags) & IORESOURCE_DISABLED)
+
+int pnp_check_port(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *port, *end, *tport, *tend;
+
+	port = &res->start;
+	end = &res->end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (!request_region(*port, length(port, end), "pnp"))
+			return 0;
+		release_region(*port, length(port, end));
+	}
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		int rport = pnp_reserve_io[i << 1];
+		int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
+		if (ranged_conflict(port, end, &rport, &rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_IO) {
+			tport = &tres->start;
+			tend = &tres->end;
+			if (ranged_conflict(port, end, tport, tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_IO) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->flags & IORESOURCE_WINDOW)
+					continue;
+				tport = &tres->start;
+				tend = &tres->end;
+				if (ranged_conflict(port, end, tport, tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *addr, *end, *taddr, *tend;
+
+	addr = &res->start;
+	end = &res->end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (!request_mem_region(*addr, length(addr, end), "pnp"))
+			return 0;
+		release_mem_region(*addr, length(addr, end));
+	}
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		int raddr = pnp_reserve_mem[i << 1];
+		int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
+		if (ranged_conflict(addr, end, &raddr, &rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_MEM) {
+			taddr = &tres->start;
+			tend = &tres->end;
+			if (ranged_conflict(addr, end, taddr, tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_MEM) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->flags & IORESOURCE_WINDOW)
+					continue;
+				taddr = &tres->start;
+				tend = &tres->end;
+				if (ranged_conflict(addr, end, taddr, tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+static irqreturn_t pnp_test_handler(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PCI
+static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
+			    unsigned int irq)
+{
+	u32 class;
+	u8 progif;
+
+	if (pci->irq == irq) {
+		pnp_dbg(&pnp->dev, "  device %s using irq %d\n",
+			pci_name(pci), irq);
+		return 1;
+	}
+
+	/*
+	 * See pci_setup_device() and ata_pci_sff_activate_host() for
+	 * similar IDE legacy detection.
+	 */
+	pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
+	class >>= 8;		/* discard revision ID */
+	progif = class & 0xff;
+	class >>= 8;
+
+	if (class == PCI_CLASS_STORAGE_IDE) {
+		/*
+		 * Unless both channels are native-PCI mode only,
+		 * treat the compatibility IRQs as busy.
+		 */
+		if ((progif & 0x5) != 0x5)
+			if (pci_get_legacy_ide_irq(pci, 0) == irq ||
+			    pci_get_legacy_ide_irq(pci, 1) == irq) {
+				pnp_dbg(&pnp->dev, "  legacy IDE device %s "
+					"using irq %d\n", pci_name(pci), irq);
+				return 1;
+			}
+	}
+
+	return 0;
+}
+#endif
+
+static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
+{
+#ifdef CONFIG_PCI
+	struct pci_dev *pci = NULL;
+
+	for_each_pci_dev(pci) {
+		if (pci_dev_uses_irq(pnp, pci, irq)) {
+			pci_dev_put(pci);
+			return 1;
+		}
+	}
+#endif
+	return 0;
+}
+
+int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *irq;
+
+	irq = &res->start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*irq > 15)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 16; i++) {
+		if (pnp_reserve_irq[i] == *irq)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_IRQ) {
+			if (tres->start == *irq)
+				return 0;
+		}
+	}
+
+	/* check if the resource is being used by a pci device */
+	if (pci_uses_irq(dev, *irq))
+		return 0;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (request_irq(*irq, pnp_test_handler,
+				IRQF_PROBE_SHARED, "pnp", NULL))
+			return 0;
+		free_irq(*irq, NULL);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_IRQ) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->start == *irq)
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+#ifdef CONFIG_ISA_DMA_API
+int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
+{
+	int i;
+	struct pnp_dev *tdev;
+	struct resource *tres;
+	resource_size_t *dma;
+
+	dma = &res->start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(res->flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*dma == 4 || *dma > 7)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (i = 0; i < 8; i++) {
+		if (pnp_reserve_dma[i] == *dma)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
+		if (tres != res && tres->flags & IORESOURCE_DMA) {
+			if (tres->start == *dma)
+				return 0;
+		}
+	}
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if (!dev->active) {
+		if (request_dma(*dma, "pnp"))
+			return 0;
+		free_dma(*dma);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (i = 0;
+		     (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
+		     i++) {
+			if (tres->flags & IORESOURCE_DMA) {
+				if (cannot_compare(tres->flags))
+					continue;
+				if (tres->start == *dma)
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+#endif /* CONFIG_ISA_DMA_API */
+
+unsigned long pnp_resource_type(struct resource *res)
+{
+	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
+			     IORESOURCE_IRQ | IORESOURCE_DMA |
+			     IORESOURCE_BUS);
+}
+
+struct resource *pnp_get_resource(struct pnp_dev *dev,
+				  unsigned long type, unsigned int num)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (pnp_resource_type(res) == type && num-- == 0)
+			return res;
+	}
+	return NULL;
+}
+EXPORT_SYMBOL(pnp_get_resource);
+
+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res;
+
+	pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
+	if (!pnp_res)
+		return NULL;
+
+	list_add_tail(&pnp_res->list, &dev->resources);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+				      struct resource *res)
+{
+	struct pnp_resource *pnp_res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource %pR\n", res);
+		return NULL;
+	}
+
+	pnp_res->res = *res;
+	pnp_res->res.name = dev->name;
+	dev_dbg(&dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+					  int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_IRQ | flags;
+	res->start = irq;
+	res->end = irq;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
+					  int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_DMA | flags;
+	res->start = dma;
+	res->end = dma;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+					 resource_size_t start,
+					 resource_size_t end, int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_IO | flags;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end, int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_MEM | flags;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+
+	pnp_res = pnp_new_resource(dev);
+	if (!pnp_res) {
+		dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_BUS;
+	res->start = start;
+	res->end = end;
+
+	dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+	return pnp_res;
+}
+
+/*
+ * Determine whether the specified resource is a possible configuration
+ * for this device.
+ */
+int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
+			resource_size_t size)
+{
+	struct pnp_option *option;
+	struct pnp_port *port;
+	struct pnp_mem *mem;
+	struct pnp_irq *irq;
+	struct pnp_dma *dma;
+
+	list_for_each_entry(option, &dev->options, list) {
+		if (option->type != type)
+			continue;
+
+		switch (option->type) {
+		case IORESOURCE_IO:
+			port = &option->u.port;
+			if (port->min == start && port->size == size)
+				return 1;
+			break;
+		case IORESOURCE_MEM:
+			mem = &option->u.mem;
+			if (mem->min == start && mem->size == size)
+				return 1;
+			break;
+		case IORESOURCE_IRQ:
+			irq = &option->u.irq;
+			if (start < PNP_IRQ_NR &&
+			    test_bit(start, irq->map.bits))
+				return 1;
+			break;
+		case IORESOURCE_DMA:
+			dma = &option->u.dma;
+			if (dma->map & (1 << start))
+				return 1;
+			break;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(pnp_possible_config);
+
+int pnp_range_reserved(resource_size_t start, resource_size_t end)
+{
+	struct pnp_dev *dev;
+	struct pnp_resource *pnp_res;
+	resource_size_t *dev_start, *dev_end;
+
+	pnp_for_each_dev(dev) {
+		list_for_each_entry(pnp_res, &dev->resources, list) {
+			dev_start = &pnp_res->res.start;
+			dev_end   = &pnp_res->res.end;
+			if (ranged_conflict(&start, &end, dev_start, dev_end))
+				return 1;
+		}
+	}
+	return 0;
+}
+EXPORT_SYMBOL(pnp_range_reserved);
+
+/* format is: pnp_reserve_irq=irq1[,irq2] .... */
+static int __init pnp_setup_reserve_irq(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_irq[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
+
+/* format is: pnp_reserve_dma=dma1[,dma2] .... */
+static int __init pnp_setup_reserve_dma(char *str)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		if (get_option(&str, &pnp_reserve_dma[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
+
+/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
+static int __init pnp_setup_reserve_io(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_io[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_io=", pnp_setup_reserve_io);
+
+/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
+static int __init pnp_setup_reserve_mem(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str, &pnp_reserve_mem[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);