diff options
author | Arnd Bergmann <arnd@arndb.de> | 2005-06-23 09:43:23 +1000 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2005-06-23 09:43:23 +1000 |
commit | c5a3c2e52af1bcb118022ffac9a0fd1d42d43bd3 (patch) | |
tree | e9a646214342f6cd0f003a1677ae57f4dc9be012 /arch/ppc64 | |
parent | 773bf9c469c01f01280c9bd45ec2462dd94d08a0 (diff) | |
download | linux-c5a3c2e52af1bcb118022ffac9a0fd1d42d43bd3.tar.bz2 |
[PATCH] ppc64: Split out generic rtas code from pSeries_pci.c.
BPA is using rtas for PCI but should not be confused by
pSeries code. This also avoids some #ifdefs. Other
platforms that want to use rtas_pci.c could create
their own platform_pci.c with platform specific fixups.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64')
-rw-r--r-- | arch/ppc64/kernel/Makefile | 3 | ||||
-rw-r--r-- | arch/ppc64/kernel/mpic.h | 3 | ||||
-rw-r--r-- | arch/ppc64/kernel/pSeries_pci.c | 476 | ||||
-rw-r--r-- | arch/ppc64/kernel/rtas_pci.c | 495 |
4 files changed, 506 insertions, 471 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile index b5e167cf1a05..f389f2453daa 100644 --- a/arch/ppc64/kernel/Makefile +++ b/arch/ppc64/kernel/Makefile @@ -31,13 +31,14 @@ obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o mpic.o obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \ pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \ - xics.o rtas.o pSeries_setup.o pSeries_iommu.o + xics.o pSeries_setup.o pSeries_iommu.o obj-$(CONFIG_EEH) += eeh.o obj-$(CONFIG_PROC_FS) += proc_ppc64.o obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o +obj-$(CONFIG_PPC_RTAS) += rtas.o rtas_pci.o obj-$(CONFIG_RTAS_PROC) += rtas-proc.o obj-$(CONFIG_SCANLOG) += scanlog.o obj-$(CONFIG_VIOPATH) += viopath.o diff --git a/arch/ppc64/kernel/mpic.h b/arch/ppc64/kernel/mpic.h index 571b3c99e062..63e177143eac 100644 --- a/arch/ppc64/kernel/mpic.h +++ b/arch/ppc64/kernel/mpic.h @@ -265,3 +265,6 @@ extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask); extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs); /* This one gets to the primary mpic */ extern int mpic_get_irq(struct pt_regs *regs); + +/* global mpic for pSeries */ +extern struct mpic *pSeries_mpic; diff --git a/arch/ppc64/kernel/pSeries_pci.c b/arch/ppc64/kernel/pSeries_pci.c index 0b1cca281408..dfa6d3d3e9f0 100644 --- a/arch/ppc64/kernel/pSeries_pci.c +++ b/arch/ppc64/kernel/pSeries_pci.c @@ -1,13 +1,11 @@ /* - * pSeries_pci.c + * arch/ppc64/kernel/pSeries_pci.c * * Copyright (C) 2001 Dave Engebretsen, IBM Corporation * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM * * pSeries specific routines for PCI. * - * Based on code from pci.c and chrp_pci.c - * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or @@ -23,430 +21,18 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/init.h> +#include <linux/ioport.h> #include <linux/kernel.h> -#include <linux/threads.h> #include <linux/pci.h> #include <linux/string.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <asm/io.h> -#include <asm/pgtable.h> -#include <asm/irq.h> -#include <asm/prom.h> -#include <asm/machdep.h> #include <asm/pci-bridge.h> -#include <asm/iommu.h> -#include <asm/rtas.h> +#include <asm/prom.h> -#include "mpic.h" #include "pci.h" -/* RTAS tokens */ -static int read_pci_config; -static int write_pci_config; -static int ibm_read_pci_config; -static int ibm_write_pci_config; - -static int s7a_workaround; - -extern struct mpic *pSeries_mpic; - -static int config_access_valid(struct device_node *dn, int where) -{ - if (where < 256) - return 1; - if (where < 4096 && dn->pci_ext_config_space) - return 1; - - return 0; -} - -static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val) -{ - int returnval = -1; - unsigned long buid, addr; - int ret; - - if (!dn) - return PCIBIOS_DEVICE_NOT_FOUND; - if (!config_access_valid(dn, where)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - addr = ((where & 0xf00) << 20) | (dn->busno << 16) | - (dn->devfn << 8) | (where & 0xff); - buid = dn->phb->buid; - if (buid) { - ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval, - addr, buid >> 32, buid & 0xffffffff, size); - } else { - ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size); - } - *val = returnval; - - if (ret) - return PCIBIOS_DEVICE_NOT_FOUND; - - if (returnval == EEH_IO_ERROR_VALUE(size) - && eeh_dn_check_failure (dn, NULL)) - return PCIBIOS_DEVICE_NOT_FOUND; - - return PCIBIOS_SUCCESSFUL; -} - -static int rtas_pci_read_config(struct pci_bus *bus, - unsigned int devfn, - int where, int size, u32 *val) -{ - struct device_node *busdn, *dn; - - if (bus->self) - busdn = pci_device_to_OF_node(bus->self); - else - busdn = bus->sysdata; /* must be a phb */ - - /* Search only direct children of the bus */ - for (dn = busdn->child; dn; dn = dn->sibling) - if (dn->devfn == devfn) - return rtas_read_config(dn, where, size, val); - return PCIBIOS_DEVICE_NOT_FOUND; -} - -static int rtas_write_config(struct device_node *dn, int where, int size, u32 val) -{ - unsigned long buid, addr; - int ret; - - if (!dn) - return PCIBIOS_DEVICE_NOT_FOUND; - if (!config_access_valid(dn, where)) - return PCIBIOS_BAD_REGISTER_NUMBER; - - addr = ((where & 0xf00) << 20) | (dn->busno << 16) | - (dn->devfn << 8) | (where & 0xff); - buid = dn->phb->buid; - if (buid) { - ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val); - } else { - ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val); - } - - if (ret) - return PCIBIOS_DEVICE_NOT_FOUND; - - return PCIBIOS_SUCCESSFUL; -} - -static int rtas_pci_write_config(struct pci_bus *bus, - unsigned int devfn, - int where, int size, u32 val) -{ - struct device_node *busdn, *dn; - - if (bus->self) - busdn = pci_device_to_OF_node(bus->self); - else - busdn = bus->sysdata; /* must be a phb */ - - /* Search only direct children of the bus */ - for (dn = busdn->child; dn; dn = dn->sibling) - if (dn->devfn == devfn) - return rtas_write_config(dn, where, size, val); - return PCIBIOS_DEVICE_NOT_FOUND; -} - -struct pci_ops rtas_pci_ops = { - rtas_pci_read_config, - rtas_pci_write_config -}; - -int is_python(struct device_node *dev) -{ - char *model = (char *)get_property(dev, "model", NULL); - - if (model && strstr(model, "Python")) - return 1; - - return 0; -} - -static int get_phb_reg_prop(struct device_node *dev, - unsigned int addr_size_words, - struct reg_property64 *reg) -{ - unsigned int *ui_ptr = NULL, len; - - /* Found a PHB, now figure out where his registers are mapped. */ - ui_ptr = (unsigned int *)get_property(dev, "reg", &len); - if (ui_ptr == NULL) - return 1; - - if (addr_size_words == 1) { - reg->address = ((struct reg_property32 *)ui_ptr)->address; - reg->size = ((struct reg_property32 *)ui_ptr)->size; - } else { - *reg = *((struct reg_property64 *)ui_ptr); - } - - return 0; -} - -static void python_countermeasures(struct device_node *dev, - unsigned int addr_size_words) -{ - struct reg_property64 reg_struct; - void __iomem *chip_regs; - volatile u32 val; - - if (get_phb_reg_prop(dev, addr_size_words, ®_struct)) - return; - - /* Python's register file is 1 MB in size. */ - chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000); - - /* - * Firmware doesn't always clear this bit which is critical - * for good performance - Anton - */ - -#define PRG_CL_RESET_VALID 0x00010000 - - val = in_be32(chip_regs + 0xf6030); - if (val & PRG_CL_RESET_VALID) { - printk(KERN_INFO "Python workaround: "); - val &= ~PRG_CL_RESET_VALID; - out_be32(chip_regs + 0xf6030, val); - /* - * We must read it back for changes to - * take effect - */ - val = in_be32(chip_regs + 0xf6030); - printk("reg0: %x\n", val); - } - - iounmap(chip_regs); -} - -void __init init_pci_config_tokens (void) -{ - read_pci_config = rtas_token("read-pci-config"); - write_pci_config = rtas_token("write-pci-config"); - ibm_read_pci_config = rtas_token("ibm,read-pci-config"); - ibm_write_pci_config = rtas_token("ibm,write-pci-config"); -} - -unsigned long __devinit get_phb_buid (struct device_node *phb) -{ - int addr_cells; - unsigned int *buid_vals; - unsigned int len; - unsigned long buid; - - if (ibm_read_pci_config == -1) return 0; - - /* PHB's will always be children of the root node, - * or so it is promised by the current firmware. */ - if (phb->parent == NULL) - return 0; - if (phb->parent->parent) - return 0; - - buid_vals = (unsigned int *) get_property(phb, "reg", &len); - if (buid_vals == NULL) - return 0; - - addr_cells = prom_n_addr_cells(phb); - if (addr_cells == 1) { - buid = (unsigned long) buid_vals[0]; - } else { - buid = (((unsigned long)buid_vals[0]) << 32UL) | - (((unsigned long)buid_vals[1]) & 0xffffffff); - } - return buid; -} - -static int phb_set_bus_ranges(struct device_node *dev, - struct pci_controller *phb) -{ - int *bus_range; - unsigned int len; - - bus_range = (int *) get_property(dev, "bus-range", &len); - if (bus_range == NULL || len < 2 * sizeof(int)) { - return 1; - } - - phb->first_busno = bus_range[0]; - phb->last_busno = bus_range[1]; - - return 0; -} - -static int __devinit setup_phb(struct device_node *dev, - struct pci_controller *phb, - unsigned int addr_size_words) -{ - pci_setup_pci_controller(phb); - - if (is_python(dev)) - python_countermeasures(dev, addr_size_words); - - if (phb_set_bus_ranges(dev, phb)) - return 1; - - phb->arch_data = dev; - phb->ops = &rtas_pci_ops; - phb->buid = get_phb_buid(dev); - - return 0; -} - -static void __devinit add_linux_pci_domain(struct device_node *dev, - struct pci_controller *phb, - struct property *of_prop) -{ - memset(of_prop, 0, sizeof(struct property)); - of_prop->name = "linux,pci-domain"; - of_prop->length = sizeof(phb->global_number); - of_prop->value = (unsigned char *)&of_prop[1]; - memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number)); - prom_add_property(dev, of_prop); -} - -static struct pci_controller * __init alloc_phb(struct device_node *dev, - unsigned int addr_size_words) -{ - struct pci_controller *phb; - struct property *of_prop; - - phb = alloc_bootmem(sizeof(struct pci_controller)); - if (phb == NULL) - return NULL; - - of_prop = alloc_bootmem(sizeof(struct property) + - sizeof(phb->global_number)); - if (!of_prop) - return NULL; - - if (setup_phb(dev, phb, addr_size_words)) - return NULL; - - add_linux_pci_domain(dev, phb, of_prop); - - return phb; -} - -static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words) -{ - struct pci_controller *phb; - - phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller), - GFP_KERNEL); - if (phb == NULL) - return NULL; - - if (setup_phb(dev, phb, addr_size_words)) - return NULL; - - phb->is_dynamic = 1; - - /* TODO: linux,pci-domain? */ - - return phb; -} - -unsigned long __init find_and_init_phbs(void) -{ - struct device_node *node; - struct pci_controller *phb; - unsigned int root_size_cells = 0; - unsigned int index; - unsigned int *opprop = NULL; - struct device_node *root = of_find_node_by_path("/"); - - if (ppc64_interrupt_controller == IC_OPEN_PIC) { - opprop = (unsigned int *)get_property(root, - "platform-open-pic", NULL); - } - - root_size_cells = prom_n_size_cells(root); - - index = 0; - - for (node = of_get_next_child(root, NULL); - node != NULL; - node = of_get_next_child(root, node)) { - if (node->type == NULL || strcmp(node->type, "pci") != 0) - continue; - - phb = alloc_phb(node, root_size_cells); - if (!phb) - continue; - - pci_process_bridge_OF_ranges(phb, node); - pci_setup_phb_io(phb, index == 0); - - if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) { - int addr = root_size_cells * (index + 2) - 1; - mpic_assign_isu(pSeries_mpic, index, opprop[addr]); - } - - index++; - } - - of_node_put(root); - pci_devs_phb_init(); - - /* - * pci_probe_only and pci_assign_all_buses can be set via properties - * in chosen. - */ - if (of_chosen) { - int *prop; - - prop = (int *)get_property(of_chosen, "linux,pci-probe-only", - NULL); - if (prop) - pci_probe_only = *prop; - - prop = (int *)get_property(of_chosen, - "linux,pci-assign-all-buses", NULL); - if (prop) - pci_assign_all_buses = *prop; - } - - return 0; -} - -struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn) -{ - struct device_node *root = of_find_node_by_path("/"); - unsigned int root_size_cells = 0; - struct pci_controller *phb; - struct pci_bus *bus; - int primary; - - root_size_cells = prom_n_size_cells(root); - - primary = list_empty(&hose_list); - phb = alloc_phb_dynamic(dn, root_size_cells); - if (!phb) - return NULL; - - pci_process_bridge_OF_ranges(phb, dn); - - pci_setup_phb_io_dynamic(phb, primary); - of_node_put(root); - - pci_devs_phb_init_dynamic(phb); - phb->last_busno = 0xff; - bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data); - phb->bus = bus; - phb->last_busno = bus->subordinate; - - return phb; -} -EXPORT_SYMBOL(init_phb_dynamic); +static int __initdata s7a_workaround; #if 0 void pcibios_name_device(struct pci_dev *dev) @@ -474,7 +60,7 @@ void pcibios_name_device(struct pci_dev *dev) DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); #endif -static void check_s7a(void) +static void __init check_s7a(void) { struct device_node *root; char *model; @@ -488,56 +74,6 @@ static void check_s7a(void) } } -/* RPA-specific bits for removing PHBs */ -int pcibios_remove_root_bus(struct pci_controller *phb) -{ - struct pci_bus *b = phb->bus; - struct resource *res; - int rc, i; - - res = b->resource[0]; - if (!res->flags) { - printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__, - b->name); - return 1; - } - - rc = unmap_bus_range(b); - if (rc) { - printk(KERN_ERR "%s: failed to unmap IO on bus %s\n", - __FUNCTION__, b->name); - return 1; - } - - if (release_resource(res)) { - printk(KERN_ERR "%s: failed to release IO on bus %s\n", - __FUNCTION__, b->name); - return 1; - } - - for (i = 1; i < 3; ++i) { - res = b->resource[i]; - if (!res->flags && i == 0) { - printk(KERN_ERR "%s: no MEM resource for PHB %s\n", - __FUNCTION__, b->name); - return 1; - } - if (res->flags && release_resource(res)) { - printk(KERN_ERR - "%s: failed to release IO %d on bus %s\n", - __FUNCTION__, i, b->name); - return 1; - } - } - - list_del(&phb->list_node); - if (phb->is_dynamic) - kfree(phb); - - return 0; -} -EXPORT_SYMBOL(pcibios_remove_root_bus); - static void __init pSeries_request_regions(void) { if (!isa_io_base) diff --git a/arch/ppc64/kernel/rtas_pci.c b/arch/ppc64/kernel/rtas_pci.c new file mode 100644 index 000000000000..1048817befb8 --- /dev/null +++ b/arch/ppc64/kernel/rtas_pci.c @@ -0,0 +1,495 @@ +/* + * arch/ppc64/kernel/rtas_pci.c + * + * Copyright (C) 2001 Dave Engebretsen, IBM Corporation + * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM + * + * RTAS specific routines for PCI. + * + * Based on code from pci.c, chrp_pci.c and pSeries_pci.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/kernel.h> +#include <linux/threads.h> +#include <linux/pci.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/bootmem.h> + +#include <asm/io.h> +#include <asm/pgtable.h> +#include <asm/irq.h> +#include <asm/prom.h> +#include <asm/machdep.h> +#include <asm/pci-bridge.h> +#include <asm/iommu.h> +#include <asm/rtas.h> + +#include "mpic.h" +#include "pci.h" + +/* RTAS tokens */ +static int read_pci_config; +static int write_pci_config; +static int ibm_read_pci_config; +static int ibm_write_pci_config; + +static int config_access_valid(struct device_node *dn, int where) +{ + if (where < 256) + return 1; + if (where < 4096 && dn->pci_ext_config_space) + return 1; + + return 0; +} + +static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val) +{ + int returnval = -1; + unsigned long buid, addr; + int ret; + + if (!dn) + return PCIBIOS_DEVICE_NOT_FOUND; + if (!config_access_valid(dn, where)) + return PCIBIOS_BAD_REGISTER_NUMBER; + + addr = ((where & 0xf00) << 20) | (dn->busno << 16) | + (dn->devfn << 8) | (where & 0xff); + buid = dn->phb->buid; + if (buid) { + ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval, + addr, buid >> 32, buid & 0xffffffff, size); + } else { + ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size); + } + *val = returnval; + + if (ret) + return PCIBIOS_DEVICE_NOT_FOUND; + + if (returnval == EEH_IO_ERROR_VALUE(size) + && eeh_dn_check_failure (dn, NULL)) + return PCIBIOS_DEVICE_NOT_FOUND; + + return PCIBIOS_SUCCESSFUL; +} + +static int rtas_pci_read_config(struct pci_bus *bus, + unsigned int devfn, + int where, int size, u32 *val) +{ + struct device_node *busdn, *dn; + + if (bus->self) + busdn = pci_device_to_OF_node(bus->self); + else + busdn = bus->sysdata; /* must be a phb */ + + /* Search only direct children of the bus */ + for (dn = busdn->child; dn; dn = dn->sibling) + if (dn->devfn == devfn) + return rtas_read_config(dn, where, size, val); + return PCIBIOS_DEVICE_NOT_FOUND; +} + +static int rtas_write_config(struct device_node *dn, int where, int size, u32 val) +{ + unsigned long buid, addr; + int ret; + + if (!dn) + return PCIBIOS_DEVICE_NOT_FOUND; + if (!config_access_valid(dn, where)) + return PCIBIOS_BAD_REGISTER_NUMBER; + + addr = ((where & 0xf00) << 20) | (dn->busno << 16) | + (dn->devfn << 8) | (where & 0xff); + buid = dn->phb->buid; + if (buid) { + ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val); + } else { + ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val); + } + + if (ret) + return PCIBIOS_DEVICE_NOT_FOUND; + + return PCIBIOS_SUCCESSFUL; +} + +static int rtas_pci_write_config(struct pci_bus *bus, + unsigned int devfn, + int where, int size, u32 val) +{ + struct device_node *busdn, *dn; + + if (bus->self) + busdn = pci_device_to_OF_node(bus->self); + else + busdn = bus->sysdata; /* must be a phb */ + + /* Search only direct children of the bus */ + for (dn = busdn->child; dn; dn = dn->sibling) + if (dn->devfn == devfn) + return rtas_write_config(dn, where, size, val); + return PCIBIOS_DEVICE_NOT_FOUND; +} + +struct pci_ops rtas_pci_ops = { + rtas_pci_read_config, + rtas_pci_write_config +}; + +int is_python(struct device_node *dev) +{ + char *model = (char *)get_property(dev, "model", NULL); + + if (model && strstr(model, "Python")) + return 1; + + return 0; +} + +static int get_phb_reg_prop(struct device_node *dev, + unsigned int addr_size_words, + struct reg_property64 *reg) +{ + unsigned int *ui_ptr = NULL, len; + + /* Found a PHB, now figure out where his registers are mapped. */ + ui_ptr = (unsigned int *)get_property(dev, "reg", &len); + if (ui_ptr == NULL) + return 1; + + if (addr_size_words == 1) { + reg->address = ((struct reg_property32 *)ui_ptr)->address; + reg->size = ((struct reg_property32 *)ui_ptr)->size; + } else { + *reg = *((struct reg_property64 *)ui_ptr); + } + + return 0; +} + +static void python_countermeasures(struct device_node *dev, + unsigned int addr_size_words) +{ + struct reg_property64 reg_struct; + void __iomem *chip_regs; + volatile u32 val; + + if (get_phb_reg_prop(dev, addr_size_words, ®_struct)) + return; + + /* Python's register file is 1 MB in size. */ + chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000); + + /* + * Firmware doesn't always clear this bit which is critical + * for good performance - Anton + */ + +#define PRG_CL_RESET_VALID 0x00010000 + + val = in_be32(chip_regs + 0xf6030); + if (val & PRG_CL_RESET_VALID) { + printk(KERN_INFO "Python workaround: "); + val &= ~PRG_CL_RESET_VALID; + out_be32(chip_regs + 0xf6030, val); + /* + * We must read it back for changes to + * take effect + */ + val = in_be32(chip_regs + 0xf6030); + printk("reg0: %x\n", val); + } + + iounmap(chip_regs); +} + +void __init init_pci_config_tokens (void) +{ + read_pci_config = rtas_token("read-pci-config"); + write_pci_config = rtas_token("write-pci-config"); + ibm_read_pci_config = rtas_token("ibm,read-pci-config"); + ibm_write_pci_config = rtas_token("ibm,write-pci-config"); +} + +unsigned long __devinit get_phb_buid (struct device_node *phb) +{ + int addr_cells; + unsigned int *buid_vals; + unsigned int len; + unsigned long buid; + + if (ibm_read_pci_config == -1) return 0; + + /* PHB's will always be children of the root node, + * or so it is promised by the current firmware. */ + if (phb->parent == NULL) + return 0; + if (phb->parent->parent) + return 0; + + buid_vals = (unsigned int *) get_property(phb, "reg", &len); + if (buid_vals == NULL) + return 0; + + addr_cells = prom_n_addr_cells(phb); + if (addr_cells == 1) { + buid = (unsigned long) buid_vals[0]; + } else { + buid = (((unsigned long)buid_vals[0]) << 32UL) | + (((unsigned long)buid_vals[1]) & 0xffffffff); + } + return buid; +} + +static int phb_set_bus_ranges(struct device_node *dev, + struct pci_controller *phb) +{ + int *bus_range; + unsigned int len; + + bus_range = (int *) get_property(dev, "bus-range", &len); + if (bus_range == NULL || len < 2 * sizeof(int)) { + return 1; + } + + phb->first_busno = bus_range[0]; + phb->last_busno = bus_range[1]; + + return 0; +} + +static int __devinit setup_phb(struct device_node *dev, + struct pci_controller *phb, + unsigned int addr_size_words) +{ + pci_setup_pci_controller(phb); + + if (is_python(dev)) + python_countermeasures(dev, addr_size_words); + + if (phb_set_bus_ranges(dev, phb)) + return 1; + + phb->arch_data = dev; + phb->ops = &rtas_pci_ops; + phb->buid = get_phb_buid(dev); + + return 0; +} + +static void __devinit add_linux_pci_domain(struct device_node *dev, + struct pci_controller *phb, + struct property *of_prop) +{ + memset(of_prop, 0, sizeof(struct property)); + of_prop->name = "linux,pci-domain"; + of_prop->length = sizeof(phb->global_number); + of_prop->value = (unsigned char *)&of_prop[1]; + memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number)); + prom_add_property(dev, of_prop); +} + +static struct pci_controller * __init alloc_phb(struct device_node *dev, + unsigned int addr_size_words) +{ + struct pci_controller *phb; + struct property *of_prop; + + phb = alloc_bootmem(sizeof(struct pci_controller)); + if (phb == NULL) + return NULL; + + of_prop = alloc_bootmem(sizeof(struct property) + + sizeof(phb->global_number)); + if (!of_prop) + return NULL; + + if (setup_phb(dev, phb, addr_size_words)) + return NULL; + + add_linux_pci_domain(dev, phb, of_prop); + + return phb; +} + +static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words) +{ + struct pci_controller *phb; + + phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller), + GFP_KERNEL); + if (phb == NULL) + return NULL; + + if (setup_phb(dev, phb, addr_size_words)) + return NULL; + + phb->is_dynamic = 1; + + /* TODO: linux,pci-domain? */ + + return phb; +} + +unsigned long __init find_and_init_phbs(void) +{ + struct device_node *node; + struct pci_controller *phb; + unsigned int root_size_cells = 0; + unsigned int index; + unsigned int *opprop = NULL; + struct device_node *root = of_find_node_by_path("/"); + + if (ppc64_interrupt_controller == IC_OPEN_PIC) { + opprop = (unsigned int *)get_property(root, + "platform-open-pic", NULL); + } + + root_size_cells = prom_n_size_cells(root); + + index = 0; + + for (node = of_get_next_child(root, NULL); + node != NULL; + node = of_get_next_child(root, node)) { + if (node->type == NULL || strcmp(node->type, "pci") != 0) + continue; + + phb = alloc_phb(node, root_size_cells); + if (!phb) + continue; + + pci_process_bridge_OF_ranges(phb, node); + pci_setup_phb_io(phb, index == 0); +#ifdef CONFIG_PPC_PSERIES + if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) { + int addr = root_size_cells * (index + 2) - 1; + mpic_assign_isu(pSeries_mpic, index, opprop[addr]); + } +#endif + index++; + } + + of_node_put(root); + pci_devs_phb_init(); + + /* + * pci_probe_only and pci_assign_all_buses can be set via properties + * in chosen. + */ + if (of_chosen) { + int *prop; + + prop = (int *)get_property(of_chosen, "linux,pci-probe-only", + NULL); + if (prop) + pci_probe_only = *prop; + + prop = (int *)get_property(of_chosen, + "linux,pci-assign-all-buses", NULL); + if (prop) + pci_assign_all_buses = *prop; + } + + return 0; +} + +struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn) +{ + struct device_node *root = of_find_node_by_path("/"); + unsigned int root_size_cells = 0; + struct pci_controller *phb; + struct pci_bus *bus; + int primary; + + root_size_cells = prom_n_size_cells(root); + + primary = list_empty(&hose_list); + phb = alloc_phb_dynamic(dn, root_size_cells); + if (!phb) + return NULL; + + pci_process_bridge_OF_ranges(phb, dn); + + pci_setup_phb_io_dynamic(phb, primary); + of_node_put(root); + + pci_devs_phb_init_dynamic(phb); + phb->last_busno = 0xff; + bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data); + phb->bus = bus; + phb->last_busno = bus->subordinate; + + return phb; +} +EXPORT_SYMBOL(init_phb_dynamic); + +/* RPA-specific bits for removing PHBs */ +int pcibios_remove_root_bus(struct pci_controller *phb) +{ + struct pci_bus *b = phb->bus; + struct resource *res; + int rc, i; + + res = b->resource[0]; + if (!res->flags) { + printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__, + b->name); + return 1; + } + + rc = unmap_bus_range(b); + if (rc) { + printk(KERN_ERR "%s: failed to unmap IO on bus %s\n", + __FUNCTION__, b->name); + return 1; + } + + if (release_resource(res)) { + printk(KERN_ERR "%s: failed to release IO on bus %s\n", + __FUNCTION__, b->name); + return 1; + } + + for (i = 1; i < 3; ++i) { + res = b->resource[i]; + if (!res->flags && i == 0) { + printk(KERN_ERR "%s: no MEM resource for PHB %s\n", + __FUNCTION__, b->name); + return 1; + } + if (res->flags && release_resource(res)) { + printk(KERN_ERR + "%s: failed to release IO %d on bus %s\n", + __FUNCTION__, i, b->name); + return 1; + } + } + + list_del(&phb->list_node); + if (phb->is_dynamic) + kfree(phb); + + return 0; +} +EXPORT_SYMBOL(pcibios_remove_root_bus); |