X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fppc64%2Fkernel%2Fpci.c;h=f7486bee078fc41e71d4eeb0f9a6c15c6a2d0d0f;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=751071af3d10ad9c78fa9f128ff47d5dbb0e8790;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c index 751071af3..f7486bee0 100644 --- a/arch/ppc64/kernel/pci.c +++ b/arch/ppc64/kernel/pci.c @@ -11,17 +11,14 @@ * 2 of the License, or (at your option) any later version. */ +#undef DEBUG + #include #include #include -#include #include #include -#include -#include -#include #include -#include #include #include @@ -31,19 +28,24 @@ #include #include #include -#include -#include -#include -#include #include +#include #include "pci.h" +#ifdef DEBUG +#define DBG(fmt...) udbg_printf(fmt) +#else +#define DBG(fmt...) +#endif + unsigned long pci_probe_only = 1; unsigned long pci_assign_all_buses = 0; -/* legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch - devices we don't have access to. */ +/* + * legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch + * devices we don't have access to. + */ unsigned long io_page_mask; EXPORT_SYMBOL(io_page_mask); @@ -85,35 +87,11 @@ static void fixup_broken_pcnet32(struct pci_dev* dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32); -static void fixup_windbond_82c105(struct pci_dev* dev) -{ - /* Assume the windbond 82c105 is the IDE controller on a - * p610. We should probably be more careful in case - * someone tries to plug in a similar adapter. - */ - int i; - unsigned int reg; - - printk("Using INTC for W82c105 IDE controller.\n"); - pci_read_config_dword(dev, 0x40, ®); - /* Enable LEGIRQ to use INTC instead of ISA interrupts */ - pci_write_config_dword(dev, 0x40, reg | (1<<11)); - - for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { - /* zap the 2nd function of the winbond chip */ - if (dev->resource[i].flags & IORESOURCE_IO - && dev->bus->number == 0 && dev->devfn == 0x81) - dev->resource[i].flags &= ~IORESOURCE_IO; - } -} -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, fixup_windbond_82c105); - -void -pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, - struct resource *res) +void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, + struct resource *res) { unsigned long offset = 0; - struct pci_controller *hose = PCI_GET_PHB_PTR(dev); + struct pci_controller *hose = pci_bus_to_host(dev->bus); if (!hose) return; @@ -149,7 +127,7 @@ void pcibios_align_resource(void *data, struct resource *res, unsigned long size, unsigned long align) { struct pci_dev *dev = data; - struct pci_controller *hose = PCI_GET_PHB_PTR(dev); + struct pci_controller *hose = pci_bus_to_host(dev->bus); unsigned long start = res->start; unsigned long alignto; @@ -179,68 +157,27 @@ void pcibios_align_resource(void *data, struct resource *res, res->start = start; } -/* - * Allocate pci_controller(phb) initialized common variables. +static DEFINE_SPINLOCK(hose_spinlock); + +/* + * pci_controller(phb) initialized common variables. */ -struct pci_controller * __init -pci_alloc_pci_controller(enum phb_types controller_type) +void __devinit pci_setup_pci_controller(struct pci_controller *hose) { - struct pci_controller *hose; - char *model; - -#ifdef CONFIG_PPC_ISERIES - hose = (struct pci_controller *)kmalloc(sizeof(struct pci_controller), GFP_KERNEL); -#else - hose = (struct pci_controller *)alloc_bootmem(sizeof(struct pci_controller)); -#endif - if(hose == NULL) { - printk(KERN_ERR "PCI: Allocate pci_controller failed.\n"); - return NULL; - } - memset(hose, 0, sizeof(struct pci_controller)); - - switch(controller_type) { -#ifdef CONFIG_PPC_ISERIES - case phb_type_hypervisor: - model = "PHB HV"; - break; -#endif - case phb_type_python: - model = "PHB PY"; - break; - case phb_type_speedwagon: - model = "PHB SW"; - break; - case phb_type_winnipeg: - model = "PHB WP"; - break; - case phb_type_apple: - model = "PHB APPLE"; - break; - default: - model = "PHB UK"; - break; - } - - if(strlen(model) < 8) - strcpy(hose->what,model); - else - memcpy(hose->what,model,7); - hose->type = controller_type; - hose->global_number = global_phb_number++; + memset(hose, 0, sizeof(struct pci_controller)); + spin_lock(&hose_spinlock); + hose->global_number = global_phb_number++; list_add_tail(&hose->list_node, &hose_list); - - return hose; + spin_unlock(&hose_spinlock); } static void __init pcibios_claim_one_bus(struct pci_bus *b) { - struct list_head *ld; + struct pci_dev *dev; struct pci_bus *child_bus; - for (ld = b->devices.next; ld != &b->devices; ld = ld->next) { - struct pci_dev *dev = pci_dev_b(ld); + list_for_each_entry(dev, &b->devices, bus_list) { int i; for (i = 0; i < PCI_NUM_RESOURCES; i++) { @@ -259,12 +196,10 @@ static void __init pcibios_claim_one_bus(struct pci_bus *b) #ifndef CONFIG_PPC_ISERIES static void __init pcibios_claim_of_setup(void) { - struct list_head *lb; + struct pci_bus *b; - for (lb = pci_root_buses.next; lb != &pci_root_buses; lb = lb->next) { - struct pci_bus *b = pci_bus_b(lb); + list_for_each_entry(b, &pci_root_buses, node) pcibios_claim_one_bus(b); - } } #endif @@ -303,7 +238,7 @@ static int __init pcibios_init(void) ppc_md.pcibios_fixup(); /* Cache the location of the ISA bridge (if we have one) */ - ppc64_isabridge_dev = pci_find_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); + ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL); if (ppc64_isabridge_dev != NULL) printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev)); @@ -357,7 +292,7 @@ int pci_domain_nr(struct pci_bus *bus) #ifdef CONFIG_PPC_ISERIES return 0; #else - struct pci_controller *hose = PCI_GET_PHB_PTR(bus); + struct pci_controller *hose = pci_bus_to_host(bus); return hose->global_number; #endif @@ -369,7 +304,7 @@ EXPORT_SYMBOL(pci_domain_nr); int pci_name_bus(char *name, struct pci_bus *bus) { #ifndef CONFIG_PPC_ISERIES - struct pci_controller *hose = PCI_GET_PHB_PTR(bus); + struct pci_controller *hose = pci_bus_to_host(bus); if (hose->buid) sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); @@ -397,11 +332,11 @@ int pci_name_bus(char *name, struct pci_bus *bus) * * Returns negative error code on failure, zero on success. */ -static __inline__ int -__pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) +static __inline__ int __pci_mmap_make_offset(struct pci_dev *dev, + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state) { - struct pci_controller *hose = PCI_GET_PHB_PTR(dev); + struct pci_controller *hose = pci_bus_to_host(dev->bus); unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; unsigned long io_offset = 0; int i, res_bit; @@ -454,9 +389,9 @@ __pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma, * Set vm_flags of VMA, as appropriate for this architecture, for a pci device * mapping. */ -static __inline__ void -__pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma, - enum pci_mmap_state mmap_state) +static __inline__ void __pci_mmap_set_flags(struct pci_dev *dev, + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state) { vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO; } @@ -465,9 +400,10 @@ __pci_mmap_set_flags(struct pci_dev *dev, struct vm_area_struct *vma, * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci * device mapping. */ -static __inline__ void -__pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma, - enum pci_mmap_state mmap_state, int write_combine) +static __inline__ void __pci_mmap_set_pgprot(struct pci_dev *dev, + struct vm_area_struct *vma, + enum pci_mmap_state mmap_state, + int write_combine) { long prot = pgprot_val(vma->vm_page_prot); @@ -501,7 +437,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, __pci_mmap_set_flags(dev, vma, mmap_state); __pci_mmap_set_pgprot(dev, vma, mmap_state, write_combine); - ret = remap_page_range(vma, vma->vm_start, vma->vm_pgoff << PAGE_SHIFT, + ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end - vma->vm_start, vma->vm_page_prot); return ret; @@ -534,9 +470,9 @@ void pcibios_add_platform_entries(struct pci_dev *pdev) #define ISA_SPACE_MASK 0x1 #define ISA_SPACE_IO 0x1 -static void pci_process_ISA_OF_ranges(struct device_node *isa_node, +static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node, unsigned long phb_io_base_phys, - void * phb_io_base_virt) + void __iomem * phb_io_base_virt) { struct isa_range *range; unsigned long pci_addr; @@ -545,9 +481,11 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node, int rlen = 0; range = (struct isa_range *) get_property(isa_node, "ranges", &rlen); - if (rlen < sizeof(struct isa_range)) { - printk(KERN_ERR "unexpected isa range size: %s\n", - __FUNCTION__); + if (range == NULL || (rlen < sizeof(struct isa_range))) { + printk(KERN_ERR "no ISA ranges or unexpected isa range size," + "mapping 64k\n"); + __ioremap_explicit(phb_io_base_phys, (unsigned long)phb_io_base_virt, + 0x10000, _PAGE_NO_CACHE); return; } @@ -579,8 +517,8 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node, } } -void __init pci_process_bridge_OF_ranges(struct pci_controller *hose, - struct device_node *dev, int primary) +void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose, + struct device_node *dev) { unsigned int *ranges; unsigned long size; @@ -589,7 +527,6 @@ void __init pci_process_bridge_OF_ranges(struct pci_controller *hose, struct resource *res; int np, na = prom_n_addr_cells(dev); unsigned long pci_addr, cpu_phys_addr; - struct device_node *isa_dn; np = na + 5; @@ -613,35 +550,18 @@ void __init pci_process_bridge_OF_ranges(struct pci_controller *hose, cpu_phys_addr = cpu_phys_addr << 32 | ranges[4]; size = (unsigned long)ranges[na+3] << 32 | ranges[na+4]; - - switch (ranges[0] >> 24) { + if (size == 0) + continue; + switch ((ranges[0] >> 24) & 0x3) { case 1: /* I/O space */ hose->io_base_phys = cpu_phys_addr; - hose->io_base_virt = reserve_phb_iospace(size); - PPCDBG(PPCDBG_PHBINIT, - "phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", - hose->global_number, hose->io_base_phys, - (unsigned long) hose->io_base_virt); - - if (primary) { - pci_io_base = (unsigned long)hose->io_base_virt; - isa_dn = of_find_node_by_type(NULL, "isa"); - if (isa_dn) { - isa_io_base = pci_io_base; - pci_process_ISA_OF_ranges(isa_dn, - hose->io_base_phys, - hose->io_base_virt); - of_node_put(isa_dn); - /* Allow all IO */ - io_page_mask = -1; - } - } + hose->pci_io_size = size; res = &hose->io_resource; res->flags = IORESOURCE_IO; res->start = pci_addr; - res->start += (unsigned long)hose->io_base_virt - - pci_io_base; + DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number, + res->start, res->start + size - 1); break; case 2: /* memory space */ memno = 0; @@ -654,6 +574,8 @@ void __init pci_process_bridge_OF_ranges(struct pci_controller *hose, res = &hose->mem_resources[memno]; res->flags = IORESOURCE_MEM; res->start = cpu_phys_addr; + DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number, + res->start, res->start + size - 1); } break; } @@ -668,23 +590,142 @@ void __init pci_process_bridge_OF_ranges(struct pci_controller *hose, } } -/*********************************************************************** - * pci_find_hose_for_OF_device - * - * This function finds the PHB that matching device_node in the - * OpenFirmware by scanning all the pci_controllers. - * - ***********************************************************************/ -struct pci_controller* pci_find_hose_for_OF_device(struct device_node *node) +void __init pci_setup_phb_io(struct pci_controller *hose, int primary) +{ + unsigned long size = hose->pci_io_size; + unsigned long io_virt_offset; + struct resource *res; + struct device_node *isa_dn; + + hose->io_base_virt = reserve_phb_iospace(size); + DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", + hose->global_number, hose->io_base_phys, + (unsigned long) hose->io_base_virt); + + if (primary) { + pci_io_base = (unsigned long)hose->io_base_virt; + isa_dn = of_find_node_by_type(NULL, "isa"); + if (isa_dn) { + isa_io_base = pci_io_base; + pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys, + hose->io_base_virt); + of_node_put(isa_dn); + /* Allow all IO */ + io_page_mask = -1; + } + } + + io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base; + res = &hose->io_resource; + res->start += io_virt_offset; + res->end += io_virt_offset; +} + +void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose) +{ + unsigned long size = hose->pci_io_size; + unsigned long io_virt_offset; + struct resource *res; + + hose->io_base_virt = __ioremap(hose->io_base_phys, size, + _PAGE_NO_CACHE); + DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", + hose->global_number, hose->io_base_phys, + (unsigned long) hose->io_base_virt); + + io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base; + res = &hose->io_resource; + res->start += io_virt_offset; + res->end += io_virt_offset; +} + + +static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys, + unsigned long *start_virt, unsigned long *size) { - while (node) { - struct pci_controller *hose, *tmp; - list_for_each_entry_safe(hose, tmp, &hose_list, list_node) - if (hose->arch_data == node) - return hose; - node=node->parent; + struct pci_controller *hose = pci_bus_to_host(bus); + struct pci_bus_region region; + struct resource *res; + + if (bus->self) { + res = bus->resource[0]; + pcibios_resource_to_bus(bus->self, ®ion, res); + *start_phys = hose->io_base_phys + region.start; + *start_virt = (unsigned long) hose->io_base_virt + + region.start; + if (region.end > region.start) + *size = region.end - region.start + 1; + else { + printk("%s(): unexpected region 0x%lx->0x%lx\n", + __FUNCTION__, region.start, region.end); + return 1; + } + + } else { + /* Root Bus */ + res = &hose->io_resource; + *start_phys = hose->io_base_phys; + *start_virt = (unsigned long) hose->io_base_virt; + if (res->end > res->start) + *size = res->end - res->start + 1; + else { + printk("%s(): unexpected region 0x%lx->0x%lx\n", + __FUNCTION__, res->start, res->end); + return 1; + } } - return NULL; + + return 0; +} + +int unmap_bus_range(struct pci_bus *bus) +{ + unsigned long start_phys; + unsigned long start_virt; + unsigned long size; + + if (!bus) { + printk(KERN_ERR "%s() expected bus\n", __FUNCTION__); + return 1; + } + + if (get_bus_io_range(bus, &start_phys, &start_virt, &size)) + return 1; + if (iounmap_explicit((void __iomem *) start_virt, size)) + return 1; + + return 0; +} +EXPORT_SYMBOL(unmap_bus_range); + +int remap_bus_range(struct pci_bus *bus) +{ + unsigned long start_phys; + unsigned long start_virt; + unsigned long size; + + if (!bus) { + printk(KERN_ERR "%s() expected bus\n", __FUNCTION__); + return 1; + } + + + if (get_bus_io_range(bus, &start_phys, &start_virt, &size)) + return 1; + printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size); + if (__ioremap_explicit(start_phys, start_virt, size, _PAGE_NO_CACHE)) + return 1; + + return 0; +} +EXPORT_SYMBOL(remap_bus_range); + +void phbs_remap_io(void) +{ + struct pci_controller *hose, *tmp; + + list_for_each_entry_safe(hose, tmp, &hose_list, list_node) + remap_bus_range(hose->bus); } /* @@ -700,6 +741,9 @@ int pcibios_scan_all_fns(struct pci_bus *bus, int devfn) else busdn = bus->sysdata; /* must be a phb */ + if (busdn == NULL) + return 0; + /* * Check to see if there is any of the 8 functions are in the * device tree. If they are then we need to scan all the @@ -717,12 +761,13 @@ void __devinit pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus) { /* Update device resources. */ - struct pci_controller *hose = PCI_GET_PHB_PTR(bus); + struct pci_controller *hose = pci_bus_to_host(bus); int i; for (i = 0; i < PCI_NUM_RESOURCES; i++) { if (dev->resource[i].flags & IORESOURCE_IO) { - unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base; + unsigned long offset = (unsigned long)hose->io_base_virt + - pci_io_base; unsigned long start, end, mask; start = dev->resource[i].start += offset; @@ -752,10 +797,7 @@ EXPORT_SYMBOL(pcibios_fixup_device_resources); void __devinit pcibios_fixup_bus(struct pci_bus *bus) { - struct pci_controller *hose = PCI_GET_PHB_PTR(bus); - struct list_head *ln; - - /* XXX or bus->parent? */ + struct pci_controller *hose = pci_bus_to_host(bus); struct pci_dev *dev = bus->self; struct resource *res; int i; @@ -765,18 +807,13 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus) hose->bus = bus; bus->resource[0] = res = &hose->io_resource; - if (!res->flags) - BUG(); /* No I/O resource for this PHB? */ - if (request_resource(&ioport_resource, res)) + if (res->flags && request_resource(&ioport_resource, res)) printk(KERN_ERR "Failed to request IO on " "PCI domain %d\n", pci_domain_nr(bus)); - for (i = 0; i < 3; ++i) { res = &hose->mem_resources[i]; - if (!res->flags && i == 0) - BUG(); /* No memory resource for this PHB? */ bus->resource[i+1] = res; if (res->flags && request_resource(&iomem_resource, res)) printk(KERN_ERR "Failed to request MEM on " @@ -791,56 +828,46 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus) pcibios_fixup_device_resources(dev, bus); } - /* XXX Need to check why Alpha doesnt do this - Anton */ + ppc_md.iommu_bus_setup(bus); + + list_for_each_entry(dev, &bus->devices, bus_list) + ppc_md.iommu_dev_setup(dev); + if (!pci_probe_only) return; - for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) { - struct pci_dev *dev = pci_dev_b(ln); + list_for_each_entry(dev, &bus->devices, bus_list) { if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) pcibios_fixup_device_resources(dev, bus); } } EXPORT_SYMBOL(pcibios_fixup_bus); -/****************************************************************** - * pci_read_irq_line - * - * Reads the Interrupt Pin to determine if interrupt is use by card. +/* + * Reads the interrupt pin to determine if interrupt is use by card. * If the interrupt is used, then gets the interrupt line from the * openfirmware and sets it in the pci_dev and pci_config line. - * - ******************************************************************/ + */ int pci_read_irq_line(struct pci_dev *pci_dev) { u8 intpin; struct device_node *node; pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin); - - if (intpin == 0) { - PPCDBG(PPCDBG_BUSWALK,"\tDevice: %s No Interrupt used by device.\n", - pci_name(pci_dev)); - return 0; - } + if (intpin == 0) + return 0; node = pci_device_to_OF_node(pci_dev); - if (node == NULL) { - PPCDBG(PPCDBG_BUSWALK,"\tDevice: %s Device Node not found.\n", - pci_name(pci_dev)); - return -1; - } - if (node->n_intrs == 0) { - PPCDBG(PPCDBG_BUSWALK,"\tDevice: %s No Device OF interrupts defined.\n", - pci_name(pci_dev)); - return -1; - } + if (node == NULL) + return -1; + + if (node->n_intrs == 0) + return -1; + pci_dev->irq = node->intrs[0].line; pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq); - - PPCDBG(PPCDBG_BUSWALK,"\tDevice: %s pci_dev->irq = 0x%02X\n", - pci_name(pci_dev), pci_dev->irq); + return 0; } EXPORT_SYMBOL(pci_read_irq_line);