Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 542 insertions, 0 deletions

diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
new file mode 100644
index 000000000000..2d1322dd7e19
--- /dev/null
+++ b/drivers/pnp/resource.c
@@ -0,0 +1,542 @@
+/*
+ * resource.c - Contains functions for registering and analyzing resource information
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.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(int priority)
+{
+        struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
+
+        /* check if pnp_alloc ran out of memory */
+        if (!option)
+                return NULL;
+
+        option->priority = priority & 0xff;
+        /* make sure the priority is valid */
+        if (option->priority > PNP_RES_PRIORITY_FUNCTIONAL)
+                option->priority = PNP_RES_PRIORITY_INVALID;
+
+        return option;
+}
+
+struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev)
+{
+        struct pnp_option *option;
+        if (!dev)
+                return NULL;
+
+        option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
+
+        /* this should never happen but if it does we'll try to continue */
+        if (dev->independent)
+                pnp_err("independent resource already registered");
+        dev->independent = option;
+        return option;
+}
+
+struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority)
+{
+        struct pnp_option *option;
+        if (!dev)
+                return NULL;
+
+        option = pnp_build_option(priority);
+
+        if (dev->dependent) {
+                struct pnp_option *parent = dev->dependent;
+                while (parent->next)
+                        parent = parent->next;
+                parent->next = option;
+        } else
+                dev->dependent = option;
+        return option;
+}
+
+int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data)
+{
+        struct pnp_irq *ptr;
+        if (!option)
+                return -EINVAL;
+        if (!data)
+                return -EINVAL;
+
+        ptr = option->irq;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = data;
+        else
+                option->irq = data;
+
+#ifdef CONFIG_PCI
+        {
+                int i;
+
+                for (i = 0; i < 16; i++)
+                        if (test_bit(i, data->map))
+                                pcibios_penalize_isa_irq(i);
+        }
+#endif
+        return 0;
+}
+
+int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data)
+{
+        struct pnp_dma *ptr;
+        if (!option)
+                return -EINVAL;
+        if (!data)
+                return -EINVAL;
+
+        ptr = option->dma;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = data;
+        else
+                option->dma = data;
+
+        return 0;
+}
+
+int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data)
+{
+        struct pnp_port *ptr;
+        if (!option)
+                return -EINVAL;
+        if (!data)
+                return -EINVAL;
+
+        ptr = option->port;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = data;
+        else
+                option->port = data;
+
+        return 0;
+}
+
+int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data)
+{
+        struct pnp_mem *ptr;
+        if (!option)
+                return -EINVAL;
+        if (!data)
+                return -EINVAL;
+
+        ptr = option->mem;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = data;
+        else
+                option->mem = data;
+        return 0;
+}
+
+static void pnp_free_port(struct pnp_port *port)
+{
+        struct pnp_port *next;
+
+        while (port) {
+                next = port->next;
+                kfree(port);
+                port = next;
+        }
+}
+
+static void pnp_free_irq(struct pnp_irq *irq)
+{
+        struct pnp_irq *next;
+
+        while (irq) {
+                next = irq->next;
+                kfree(irq);
+                irq = next;
+        }
+}
+
+static void pnp_free_dma(struct pnp_dma *dma)
+{
+        struct pnp_dma *next;
+
+        while (dma) {
+                next = dma->next;
+                kfree(dma);
+                dma = next;
+        }
+}
+
+static void pnp_free_mem(struct pnp_mem *mem)
+{
+        struct pnp_mem *next;
+
+        while (mem) {
+                next = mem->next;
+                kfree(mem);
+                mem = next;
+        }
+}
+
+void pnp_free_option(struct pnp_option *option)
+{
+        struct pnp_option *next;
+
+        while (option) {
+                next = option->next;
+                pnp_free_port(option->port);
+                pnp_free_irq(option->irq);
+                pnp_free_dma(option->dma);
+                pnp_free_mem(option->mem);
+                kfree(option);
+                option = next;
+        }
+}
+
+
+/*
+ * 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_UNSET | IORESOURCE_DISABLED))
+
+int pnp_check_port(struct pnp_dev * dev, int idx)
+{
+        int tmp;
+        struct pnp_dev *tdev;
+        unsigned long *port, *end, *tport, *tend;
+        port = &dev->res.port_resource[idx].start;
+        end = &dev->res.port_resource[idx].end;
+
+        /* if the resource doesn't exist, don't complain about it */
+        if (cannot_compare(dev->res.port_resource[idx].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 (__check_region(&ioport_resource, *port, length(port,end)))
+                        return 0;
+        }
+
+        /* check if the resource is reserved */
+        for (tmp = 0; tmp < 8; tmp++) {
+                int rport = pnp_reserve_io[tmp << 1];
+                int rend = pnp_reserve_io[(tmp << 1) + 1] + rport - 1;
+                if (ranged_conflict(port,end,&rport,&rend))
+                        return 0;
+        }
+
+        /* check for internal conflicts */
+        for (tmp = 0; tmp < PNP_MAX_PORT && tmp != idx; tmp++) {
+                if (dev->res.port_resource[tmp].flags & IORESOURCE_IO) {
+                        tport = &dev->res.port_resource[tmp].start;
+                        tend = &dev->res.port_resource[tmp].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 (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
+                        if (tdev->res.port_resource[tmp].flags & IORESOURCE_IO) {
+                                if (cannot_compare(tdev->res.port_resource[tmp].flags))
+                                        continue;
+                                tport = &tdev->res.port_resource[tmp].start;
+                                tend = &tdev->res.port_resource[tmp].end;
+                                if (ranged_conflict(port,end,tport,tend))
+                                        return 0;
+                        }
+                }
+        }
+
+        return 1;
+}
+
+int pnp_check_mem(struct pnp_dev * dev, int idx)
+{
+        int tmp;
+        struct pnp_dev *tdev;
+        unsigned long *addr, *end, *taddr, *tend;
+        addr = &dev->res.mem_resource[idx].start;
+        end = &dev->res.mem_resource[idx].end;
+
+        /* if the resource doesn't exist, don't complain about it */
+        if (cannot_compare(dev->res.mem_resource[idx].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 (check_mem_region(*addr, length(addr,end)))
+                        return 0;
+        }
+
+        /* check if the resource is reserved */
+        for (tmp = 0; tmp < 8; tmp++) {
+                int raddr = pnp_reserve_mem[tmp << 1];
+                int rend = pnp_reserve_mem[(tmp << 1) + 1] + raddr - 1;
+                if (ranged_conflict(addr,end,&raddr,&rend))
+                        return 0;
+        }
+
+        /* check for internal conflicts */
+        for (tmp = 0; tmp < PNP_MAX_MEM && tmp != idx; tmp++) {
+                if (dev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
+                        taddr = &dev->res.mem_resource[tmp].start;
+                        tend = &dev->res.mem_resource[tmp].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 (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
+                        if (tdev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
+                                if (cannot_compare(tdev->res.mem_resource[tmp].flags))
+                                        continue;
+                                taddr = &tdev->res.mem_resource[tmp].start;
+                                tend = &tdev->res.mem_resource[tmp].end;
+                                if (ranged_conflict(addr,end,taddr,tend))
+                                        return 0;
+                        }
+                }
+        }
+
+        return 1;
+}
+
+static irqreturn_t pnp_test_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+        return IRQ_HANDLED;
+}
+
+int pnp_check_irq(struct pnp_dev * dev, int idx)
+{
+        int tmp;
+        struct pnp_dev *tdev;
+        unsigned long * irq = &dev->res.irq_resource[idx].start;
+
+        /* if the resource doesn't exist, don't complain about it */
+        if (cannot_compare(dev->res.irq_resource[idx].flags))
+                return 1;
+
+        /* check if the resource is valid */
+        if (*irq < 0 || *irq > 15)
+                return 0;
+
+        /* check if the resource is reserved */
+        for (tmp = 0; tmp < 16; tmp++) {
+                if (pnp_reserve_irq[tmp] == *irq)
+                        return 0;
+        }
+
+        /* check for internal conflicts */
+        for (tmp = 0; tmp < PNP_MAX_IRQ && tmp != idx; tmp++) {
+                if (dev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
+                        if (dev->res.irq_resource[tmp].start == *irq)
+                                return 0;
+                }
+        }
+
+#ifdef CONFIG_PCI
+        /* check if the resource is being used by a pci device */
+        {
+                struct pci_dev *pci = NULL;
+                for_each_pci_dev(pci) {
+                        if (pci->irq == *irq)
+                                return 0;
+                }
+        }
+#endif
+
+        /* 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, SA_INTERRUPT, "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 (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
+                        if (tdev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
+                                if (cannot_compare(tdev->res.irq_resource[tmp].flags))
+                                        continue;
+                                if ((tdev->res.irq_resource[tmp].start == *irq))
+                                        return 0;
+                        }
+                }
+        }
+
+        return 1;
+}
+
+int pnp_check_dma(struct pnp_dev * dev, int idx)
+{
+#ifndef CONFIG_IA64
+        int tmp;
+        struct pnp_dev *tdev;
+        unsigned long * dma = &dev->res.dma_resource[idx].start;
+
+        /* if the resource doesn't exist, don't complain about it */
+        if (cannot_compare(dev->res.dma_resource[idx].flags))
+                return 1;
+
+        /* check if the resource is valid */
+        if (*dma < 0 || *dma == 4 || *dma > 7)
+                return 0;
+
+        /* check if the resource is reserved */
+        for (tmp = 0; tmp < 8; tmp++) {
+                if (pnp_reserve_dma[tmp] == *dma)
+                        return 0;
+        }
+
+        /* check for internal conflicts */
+        for (tmp = 0; tmp < PNP_MAX_DMA && tmp != idx; tmp++) {
+                if (dev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
+                        if (dev->res.dma_resource[tmp].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 (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
+                        if (tdev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
+                                if (cannot_compare(tdev->res.dma_resource[tmp].flags))
+                                        continue;
+                                if ((tdev->res.dma_resource[tmp].start == *dma))
+                                        return 0;
+                        }
+                }
+        }
+
+        return 1;
+#else
+        /* IA64 hasn't legacy DMA */
+        return 0;
+#endif
+}
+
+
+EXPORT_SYMBOL(pnp_register_dependent_option);
+EXPORT_SYMBOL(pnp_register_independent_option);
+EXPORT_SYMBOL(pnp_register_irq_resource);
+EXPORT_SYMBOL(pnp_register_dma_resource);
+EXPORT_SYMBOL(pnp_register_port_resource);
+EXPORT_SYMBOL(pnp_register_mem_resource);
+
+
+/* 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);