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-rw-r--r--arch/sparc64/kernel/pci.c805
1 files changed, 805 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
new file mode 100644
index 00000000000..bba140d98b1
--- /dev/null
+++ b/arch/sparc64/kernel/pci.c
@@ -0,0 +1,805 @@
+/* $Id: pci.c,v 1.39 2002/01/05 01:13:43 davem Exp $
+ * pci.c: UltraSparc PCI controller support.
+ *
+ * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+#include <asm/pbm.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/ebus.h>
+#include <asm/isa.h>
+
+unsigned long pci_memspace_mask = 0xffffffffUL;
+
+#ifndef CONFIG_PCI
+/* A "nop" PCI implementation. */
+asmlinkage int sys_pciconfig_read(unsigned long bus, unsigned long dfn,
+ unsigned long off, unsigned long len,
+ unsigned char *buf)
+{
+ return 0;
+}
+asmlinkage int sys_pciconfig_write(unsigned long bus, unsigned long dfn,
+ unsigned long off, unsigned long len,
+ unsigned char *buf)
+{
+ return 0;
+}
+#else
+
+/* List of all PCI controllers found in the system. */
+struct pci_controller_info *pci_controller_root = NULL;
+
+/* Each PCI controller found gets a unique index. */
+int pci_num_controllers = 0;
+
+/* At boot time the user can give the kernel a command
+ * line option which controls if and how PCI devices
+ * are reordered at PCI bus probing time.
+ */
+int pci_device_reorder = 0;
+
+volatile int pci_poke_in_progress;
+volatile int pci_poke_cpu = -1;
+volatile int pci_poke_faulted;
+
+static DEFINE_SPINLOCK(pci_poke_lock);
+
+void pci_config_read8(u8 *addr, u8 *ret)
+{
+ unsigned long flags;
+ u8 byte;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "lduba [%1] %2, %0\n\t"
+ "membar #Sync"
+ : "=r" (byte)
+ : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ if (!pci_poke_faulted)
+ *ret = byte;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+void pci_config_read16(u16 *addr, u16 *ret)
+{
+ unsigned long flags;
+ u16 word;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "lduha [%1] %2, %0\n\t"
+ "membar #Sync"
+ : "=r" (word)
+ : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ if (!pci_poke_faulted)
+ *ret = word;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+void pci_config_read32(u32 *addr, u32 *ret)
+{
+ unsigned long flags;
+ u32 dword;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "lduwa [%1] %2, %0\n\t"
+ "membar #Sync"
+ : "=r" (dword)
+ : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ if (!pci_poke_faulted)
+ *ret = dword;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+void pci_config_write8(u8 *addr, u8 val)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "stba %0, [%1] %2\n\t"
+ "membar #Sync"
+ : /* no outputs */
+ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+void pci_config_write16(u16 *addr, u16 val)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "stha %0, [%1] %2\n\t"
+ "membar #Sync"
+ : /* no outputs */
+ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+void pci_config_write32(u32 *addr, u32 val)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&pci_poke_lock, flags);
+ pci_poke_cpu = smp_processor_id();
+ pci_poke_in_progress = 1;
+ pci_poke_faulted = 0;
+ __asm__ __volatile__("membar #Sync\n\t"
+ "stwa %0, [%1] %2\n\t"
+ "membar #Sync"
+ : /* no outputs */
+ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L)
+ : "memory");
+ pci_poke_in_progress = 0;
+ pci_poke_cpu = -1;
+ spin_unlock_irqrestore(&pci_poke_lock, flags);
+}
+
+/* Probe for all PCI controllers in the system. */
+extern void sabre_init(int, char *);
+extern void psycho_init(int, char *);
+extern void schizo_init(int, char *);
+extern void schizo_plus_init(int, char *);
+extern void tomatillo_init(int, char *);
+
+static struct {
+ char *model_name;
+ void (*init)(int, char *);
+} pci_controller_table[] __initdata = {
+ { "SUNW,sabre", sabre_init },
+ { "pci108e,a000", sabre_init },
+ { "pci108e,a001", sabre_init },
+ { "SUNW,psycho", psycho_init },
+ { "pci108e,8000", psycho_init },
+ { "SUNW,schizo", schizo_init },
+ { "pci108e,8001", schizo_init },
+ { "SUNW,schizo+", schizo_plus_init },
+ { "pci108e,8002", schizo_plus_init },
+ { "SUNW,tomatillo", tomatillo_init },
+ { "pci108e,a801", tomatillo_init },
+};
+#define PCI_NUM_CONTROLLER_TYPES (sizeof(pci_controller_table) / \
+ sizeof(pci_controller_table[0]))
+
+static int __init pci_controller_init(char *model_name, int namelen, int node)
+{
+ int i;
+
+ for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) {
+ if (!strncmp(model_name,
+ pci_controller_table[i].model_name,
+ namelen)) {
+ pci_controller_table[i].init(node, model_name);
+ return 1;
+ }
+ }
+ printk("PCI: Warning unknown controller, model name [%s]\n",
+ model_name);
+ printk("PCI: Ignoring controller...\n");
+
+ return 0;
+}
+
+static int __init pci_is_controller(char *model_name, int namelen, int node)
+{
+ int i;
+
+ for (i = 0; i < PCI_NUM_CONTROLLER_TYPES; i++) {
+ if (!strncmp(model_name,
+ pci_controller_table[i].model_name,
+ namelen)) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int __init pci_controller_scan(int (*handler)(char *, int, int))
+{
+ char namebuf[64];
+ int node;
+ int count = 0;
+
+ node = prom_getchild(prom_root_node);
+ while ((node = prom_searchsiblings(node, "pci")) != 0) {
+ int len;
+
+ if ((len = prom_getproperty(node, "model", namebuf, sizeof(namebuf))) > 0 ||
+ (len = prom_getproperty(node, "compatible", namebuf, sizeof(namebuf))) > 0) {
+ int item_len = 0;
+
+ /* Our value may be a multi-valued string in the
+ * case of some compatible properties. For sanity,
+ * only try the first one. */
+
+ while (namebuf[item_len] && len) {
+ len--;
+ item_len++;
+ }
+
+ if (handler(namebuf, item_len, node))
+ count++;
+ }
+
+ node = prom_getsibling(node);
+ if (!node)
+ break;
+ }
+
+ return count;
+}
+
+
+/* Is there some PCI controller in the system? */
+int __init pcic_present(void)
+{
+ return pci_controller_scan(pci_is_controller);
+}
+
+/* Find each controller in the system, attach and initialize
+ * software state structure for each and link into the
+ * pci_controller_root. Setup the controller enough such
+ * that bus scanning can be done.
+ */
+static void __init pci_controller_probe(void)
+{
+ printk("PCI: Probing for controllers.\n");
+
+ pci_controller_scan(pci_controller_init);
+}
+
+static void __init pci_scan_each_controller_bus(void)
+{
+ struct pci_controller_info *p;
+
+ for (p = pci_controller_root; p; p = p->next)
+ p->scan_bus(p);
+}
+
+/* Reorder the pci_dev chain, so that onboard devices come first
+ * and then come the pluggable cards.
+ */
+static void __init pci_reorder_devs(void)
+{
+ struct list_head *pci_onboard = &pci_devices;
+ struct list_head *walk = pci_onboard->next;
+
+ while (walk != pci_onboard) {
+ struct pci_dev *pdev = pci_dev_g(walk);
+ struct list_head *walk_next = walk->next;
+
+ if (pdev->irq && (__irq_ino(pdev->irq) & 0x20)) {
+ list_del(walk);
+ list_add(walk, pci_onboard);
+ }
+
+ walk = walk_next;
+ }
+}
+
+extern void clock_probe(void);
+extern void power_init(void);
+
+static int __init pcibios_init(void)
+{
+ pci_controller_probe();
+ if (pci_controller_root == NULL)
+ return 0;
+
+ pci_scan_each_controller_bus();
+
+ if (pci_device_reorder)
+ pci_reorder_devs();
+
+ isa_init();
+ ebus_init();
+ clock_probe();
+ power_init();
+
+ return 0;
+}
+
+subsys_initcall(pcibios_init);
+
+void pcibios_fixup_bus(struct pci_bus *pbus)
+{
+ struct pci_pbm_info *pbm = pbus->sysdata;
+
+ /* Generic PCI bus probing sets these to point at
+ * &io{port,mem}_resouce which is wrong for us.
+ */
+ pbus->resource[0] = &pbm->io_space;
+ pbus->resource[1] = &pbm->mem_space;
+}
+
+int pci_claim_resource(struct pci_dev *pdev, int resource)
+{
+ struct pci_pbm_info *pbm = pdev->bus->sysdata;
+ struct resource *res = &pdev->resource[resource];
+ struct resource *root;
+
+ if (!pbm)
+ return -EINVAL;
+
+ if (res->flags & IORESOURCE_IO)
+ root = &pbm->io_space;
+ else
+ root = &pbm->mem_space;
+
+ pbm->parent->resource_adjust(pdev, res, root);
+
+ return request_resource(root, res);
+}
+
+/*
+ * Given the PCI bus a device resides on, try to
+ * find an acceptable resource allocation for a
+ * specific device resource..
+ */
+static int pci_assign_bus_resource(const struct pci_bus *bus,
+ struct pci_dev *dev,
+ struct resource *res,
+ unsigned long size,
+ unsigned long min,
+ int resno)
+{
+ unsigned int type_mask;
+ int i;
+
+ type_mask = IORESOURCE_IO | IORESOURCE_MEM;
+ for (i = 0 ; i < 4; i++) {
+ struct resource *r = bus->resource[i];
+ if (!r)
+ continue;
+
+ /* type_mask must match */
+ if ((res->flags ^ r->flags) & type_mask)
+ continue;
+
+ /* Ok, try it out.. */
+ if (allocate_resource(r, res, size, min, -1, size, NULL, NULL) < 0)
+ continue;
+
+ /* PCI config space updated by caller. */
+ return 0;
+ }
+ return -EBUSY;
+}
+
+int pci_assign_resource(struct pci_dev *pdev, int resource)
+{
+ struct pcidev_cookie *pcp = pdev->sysdata;
+ struct pci_pbm_info *pbm = pcp->pbm;
+ struct resource *res = &pdev->resource[resource];
+ unsigned long min, size;
+ int err;
+
+ if (res->flags & IORESOURCE_IO)
+ min = pbm->io_space.start + 0x400UL;
+ else
+ min = pbm->mem_space.start;
+
+ size = res->end - res->start + 1;
+
+ err = pci_assign_bus_resource(pdev->bus, pdev, res, size, min, resource);
+
+ if (err < 0) {
+ printk("PCI: Failed to allocate resource %d for %s\n",
+ resource, pci_name(pdev));
+ } else {
+ /* Update PCI config space. */
+ pbm->parent->base_address_update(pdev, resource);
+ }
+
+ return err;
+}
+
+/* Sort resources by alignment */
+void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head)
+{
+ int i;
+
+ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ struct resource *r;
+ struct resource_list *list, *tmp;
+ unsigned long r_align;
+
+ r = &dev->resource[i];
+ r_align = r->end - r->start;
+
+ if (!(r->flags) || r->parent)
+ continue;
+ if (!r_align) {
+ printk(KERN_WARNING "PCI: Ignore bogus resource %d "
+ "[%lx:%lx] of %s\n",
+ i, r->start, r->end, pci_name(dev));
+ continue;
+ }
+ r_align = (i < PCI_BRIDGE_RESOURCES) ? r_align + 1 : r->start;
+ for (list = head; ; list = list->next) {
+ unsigned long align = 0;
+ struct resource_list *ln = list->next;
+ int idx;
+
+ if (ln) {
+ idx = ln->res - &ln->dev->resource[0];
+ align = (idx < PCI_BRIDGE_RESOURCES) ?
+ ln->res->end - ln->res->start + 1 :
+ ln->res->start;
+ }
+ if (r_align > align) {
+ tmp = kmalloc(sizeof(*tmp), GFP_KERNEL);
+ if (!tmp)
+ panic("pdev_sort_resources(): "
+ "kmalloc() failed!\n");
+ tmp->next = ln;
+ tmp->res = r;
+ tmp->dev = dev;
+ list->next = tmp;
+ break;
+ }
+ }
+ }
+}
+
+void pcibios_update_irq(struct pci_dev *pdev, int irq)
+{
+}
+
+void pcibios_align_resource(void *data, struct resource *res,
+ unsigned long size, unsigned long align)
+{
+}
+
+int pcibios_enable_device(struct pci_dev *pdev, int mask)
+{
+ return 0;
+}
+
+void pcibios_resource_to_bus(struct pci_dev *pdev, struct pci_bus_region *region,
+ struct resource *res)
+{
+ struct pci_pbm_info *pbm = pdev->bus->sysdata;
+ struct resource zero_res, *root;
+
+ zero_res.start = 0;
+ zero_res.end = 0;
+ zero_res.flags = res->flags;
+
+ if (res->flags & IORESOURCE_IO)
+ root = &pbm->io_space;
+ else
+ root = &pbm->mem_space;
+
+ pbm->parent->resource_adjust(pdev, &zero_res, root);
+
+ region->start = res->start - zero_res.start;
+ region->end = res->end - zero_res.start;
+}
+
+void pcibios_bus_to_resource(struct pci_dev *pdev, struct resource *res,
+ struct pci_bus_region *region)
+{
+ struct pci_pbm_info *pbm = pdev->bus->sysdata;
+ struct resource *root;
+
+ res->start = region->start;
+ res->end = region->end;
+
+ if (res->flags & IORESOURCE_IO)
+ root = &pbm->io_space;
+ else
+ root = &pbm->mem_space;
+
+ pbm->parent->resource_adjust(pdev, res, root);
+}
+
+char * __init pcibios_setup(char *str)
+{
+ if (!strcmp(str, "onboardfirst")) {
+ pci_device_reorder = 1;
+ return NULL;
+ }
+ if (!strcmp(str, "noreorder")) {
+ pci_device_reorder = 0;
+ return NULL;
+ }
+ return str;
+}
+
+/* Platform support for /proc/bus/pci/X/Y mmap()s. */
+
+/* If the user uses a host-bridge as the PCI device, he may use
+ * this to perform a raw mmap() of the I/O or MEM space behind
+ * that controller.
+ *
+ * This can be useful for execution of x86 PCI bios initialization code
+ * on a PCI card, like the xfree86 int10 stuff does.
+ */
+static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state)
+{
+ struct pcidev_cookie *pcp = pdev->sysdata;
+ struct pci_pbm_info *pbm;
+ struct pci_controller_info *p;
+ unsigned long space_size, user_offset, user_size;
+
+ if (!pcp)
+ return -ENXIO;
+ pbm = pcp->pbm;
+ if (!pbm)
+ return -ENXIO;
+
+ p = pbm->parent;
+ if (p->pbms_same_domain) {
+ unsigned long lowest, highest;
+
+ lowest = ~0UL; highest = 0UL;
+ if (mmap_state == pci_mmap_io) {
+ if (p->pbm_A.io_space.flags) {
+ lowest = p->pbm_A.io_space.start;
+ highest = p->pbm_A.io_space.end + 1;
+ }
+ if (p->pbm_B.io_space.flags) {
+ if (lowest > p->pbm_B.io_space.start)
+ lowest = p->pbm_B.io_space.start;
+ if (highest < p->pbm_B.io_space.end + 1)
+ highest = p->pbm_B.io_space.end + 1;
+ }
+ space_size = highest - lowest;
+ } else {
+ if (p->pbm_A.mem_space.flags) {
+ lowest = p->pbm_A.mem_space.start;
+ highest = p->pbm_A.mem_space.end + 1;
+ }
+ if (p->pbm_B.mem_space.flags) {
+ if (lowest > p->pbm_B.mem_space.start)
+ lowest = p->pbm_B.mem_space.start;
+ if (highest < p->pbm_B.mem_space.end + 1)
+ highest = p->pbm_B.mem_space.end + 1;
+ }
+ space_size = highest - lowest;
+ }
+ } else {
+ if (mmap_state == pci_mmap_io) {
+ space_size = (pbm->io_space.end -
+ pbm->io_space.start) + 1;
+ } else {
+ space_size = (pbm->mem_space.end -
+ pbm->mem_space.start) + 1;
+ }
+ }
+
+ /* Make sure the request is in range. */
+ user_offset = vma->vm_pgoff << PAGE_SHIFT;
+ user_size = vma->vm_end - vma->vm_start;
+
+ if (user_offset >= space_size ||
+ (user_offset + user_size) > space_size)
+ return -EINVAL;
+
+ if (p->pbms_same_domain) {
+ unsigned long lowest = ~0UL;
+
+ if (mmap_state == pci_mmap_io) {
+ if (p->pbm_A.io_space.flags)
+ lowest = p->pbm_A.io_space.start;
+ if (p->pbm_B.io_space.flags &&
+ lowest > p->pbm_B.io_space.start)
+ lowest = p->pbm_B.io_space.start;
+ } else {
+ if (p->pbm_A.mem_space.flags)
+ lowest = p->pbm_A.mem_space.start;
+ if (p->pbm_B.mem_space.flags &&
+ lowest > p->pbm_B.mem_space.start)
+ lowest = p->pbm_B.mem_space.start;
+ }
+ vma->vm_pgoff = (lowest + user_offset) >> PAGE_SHIFT;
+ } else {
+ if (mmap_state == pci_mmap_io) {
+ vma->vm_pgoff = (pbm->io_space.start +
+ user_offset) >> PAGE_SHIFT;
+ } else {
+ vma->vm_pgoff = (pbm->mem_space.start +
+ user_offset) >> PAGE_SHIFT;
+ }
+ }
+
+ return 0;
+}
+
+/* Adjust vm_pgoff of VMA such that it is the physical page offset corresponding
+ * to the 32-bit pci bus offset for DEV requested by the user.
+ *
+ * Basically, the user finds the base address for his device which he wishes
+ * to mmap. They read the 32-bit value from the config space base register,
+ * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
+ * offset parameter of mmap on /proc/bus/pci/XXX for that device.
+ *
+ * Returns negative error code on failure, zero on success.
+ */
+static int __pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state)
+{
+ unsigned long user_offset = vma->vm_pgoff << PAGE_SHIFT;
+ unsigned long user32 = user_offset & pci_memspace_mask;
+ unsigned long largest_base, this_base, addr32;
+ int i;
+
+ if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
+ return __pci_mmap_make_offset_bus(dev, vma, mmap_state);
+
+ /* Figure out which base address this is for. */
+ largest_base = 0UL;
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *rp = &dev->resource[i];
+
+ /* Active? */
+ if (!rp->flags)
+ continue;
+
+ /* Same type? */
+ if (i == PCI_ROM_RESOURCE) {
+ if (mmap_state != pci_mmap_mem)
+ continue;
+ } else {
+ if ((mmap_state == pci_mmap_io &&
+ (rp->flags & IORESOURCE_IO) == 0) ||
+ (mmap_state == pci_mmap_mem &&
+ (rp->flags & IORESOURCE_MEM) == 0))
+ continue;
+ }
+
+ this_base = rp->start;
+
+ addr32 = (this_base & PAGE_MASK) & pci_memspace_mask;
+
+ if (mmap_state == pci_mmap_io)
+ addr32 &= 0xffffff;
+
+ if (addr32 <= user32 && this_base > largest_base)
+ largest_base = this_base;
+ }
+
+ if (largest_base == 0UL)
+ return -EINVAL;
+
+ /* Now construct the final physical address. */
+ if (mmap_state == pci_mmap_io)
+ vma->vm_pgoff = (((largest_base & ~0xffffffUL) | user32) >> PAGE_SHIFT);
+ else
+ vma->vm_pgoff = (((largest_base & ~(pci_memspace_mask)) | user32) >> PAGE_SHIFT);
+
+ return 0;
+}
+
+/* Set vm_flags of VMA, as appropriate for this architecture, for a pci device
+ * mapping.
+ */
+static void __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state)
+{
+ vma->vm_flags |= (VM_IO | VM_RESERVED);
+}
+
+/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
+ * device mapping.
+ */
+static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state)
+{
+ /* Our io_remap_page_range/io_remap_pfn_range takes care of this,
+ do nothing. */
+}
+
+/* Perform the actual remap of the pages for a PCI device mapping, as appropriate
+ * for this architecture. The region in the process to map is described by vm_start
+ * and vm_end members of VMA, the base physical address is found in vm_pgoff.
+ * The pci device structure is provided so that architectures may make mapping
+ * decisions on a per-device or per-bus basis.
+ *
+ * Returns a negative error code on failure, zero on success.
+ */
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state,
+ int write_combine)
+{
+ int ret;
+
+ ret = __pci_mmap_make_offset(dev, vma, mmap_state);
+ if (ret < 0)
+ return ret;
+
+ __pci_mmap_set_flags(dev, vma, mmap_state);
+ __pci_mmap_set_pgprot(dev, vma, mmap_state);
+
+ ret = io_remap_pfn_range(vma, vma->vm_start,
+ vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+ if (ret)
+ return ret;
+
+ vma->vm_flags |= VM_IO;
+ return 0;
+}
+
+/* Return the domain nuber for this pci bus */
+
+int pci_domain_nr(struct pci_bus *pbus)
+{
+ struct pci_pbm_info *pbm = pbus->sysdata;
+ int ret;
+
+ if (pbm == NULL || pbm->parent == NULL) {
+ ret = -ENXIO;
+ } else {
+ struct pci_controller_info *p = pbm->parent;
+
+ ret = p->index;
+ if (p->pbms_same_domain == 0)
+ ret = ((ret << 1) +
+ ((pbm == &pbm->parent->pbm_B) ? 1 : 0));
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(pci_domain_nr);
+
+int pcibios_prep_mwi(struct pci_dev *dev)
+{
+ /* We set correct PCI_CACHE_LINE_SIZE register values for every
+ * device probed on this platform. So there is nothing to check
+ * and this always succeeds.
+ */
+ return 0;
+}
+
+#endif /* !(CONFIG_PCI) */
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-02 11:32:41 +0000