From: John Keller Date: Tue, 29 Nov 2005 22:36:32 +0000 (-0600) Subject: [IA64-SGI] altix: pci_window fixup X-Git-Tag: v3.12-rc1~39001^2~119^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3ec829b6895092b0686254c315f42642b4a07efc;p=kernel%2Fkernel-generic.git [IA64-SGI] altix: pci_window fixup Altix only patch to add fixup code that sets up pci_controller->window. This code is a temporary fix until ACPI support on Altix is added. Also, corrects the usage of pci_dev->sysdata, which had previously been used to reference platform specific device info, to now point to a pci_controller struct. Signed-off-by: John Keller Signed-off-by: Tony Luck --- diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c index 05e4ea8..318087e 100644 --- a/arch/ia64/sn/kernel/io_init.c +++ b/arch/ia64/sn/kernel/io_init.c @@ -3,7 +3,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved. + * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved. */ #include @@ -147,6 +147,24 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev, } /* + * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified + * device. + */ +inline struct pcidev_info * +sn_pcidev_info_get(struct pci_dev *dev) +{ + struct pcidev_info *pcidev; + + list_for_each_entry(pcidev, + &(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) { + if (pcidev->pdi_linux_pcidev == dev) { + return pcidev; + } + } + return NULL; +} + +/* * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for * each node in the system. */ @@ -229,6 +247,50 @@ static void sn_fixup_ionodes(void) } +/* + * sn_pci_window_fixup() - Create a pci_window for each device resource. + * Until ACPI support is added, we need this code + * to setup pci_windows for use by + * pcibios_bus_to_resource(), + * pcibios_resource_to_bus(), etc. + */ +static void +sn_pci_window_fixup(struct pci_dev *dev, unsigned int count, + int64_t * pci_addrs) +{ + struct pci_controller *controller = PCI_CONTROLLER(dev->bus); + unsigned int i; + unsigned int idx; + unsigned int new_count; + struct pci_window *new_window; + + if (count == 0) + return; + idx = controller->windows; + new_count = controller->windows + count; + new_window = kcalloc(new_count, sizeof(struct pci_window), GFP_KERNEL); + if (new_window == NULL) + BUG(); + if (controller->window) { + memcpy(new_window, controller->window, + sizeof(struct pci_window) * controller->windows); + kfree(controller->window); + } + + /* Setup a pci_window for each device resource. */ + for (i = 0; i <= PCI_ROM_RESOURCE; i++) { + if (pci_addrs[i] == -1) + continue; + + new_window[idx].offset = dev->resource[i].start - pci_addrs[i]; + new_window[idx].resource = dev->resource[i]; + idx++; + } + + controller->windows = new_count; + controller->window = new_window; +} + void sn_pci_unfixup_slot(struct pci_dev *dev) { struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev; @@ -246,21 +308,23 @@ void sn_pci_unfixup_slot(struct pci_dev *dev) */ void sn_pci_fixup_slot(struct pci_dev *dev) { + unsigned int count = 0; int idx; int segment = pci_domain_nr(dev->bus); int status = 0; struct pcibus_bussoft *bs; struct pci_bus *host_pci_bus; struct pci_dev *host_pci_dev; + struct pcidev_info *pcidev_info; + int64_t pci_addrs[PCI_ROM_RESOURCE + 1]; struct sn_irq_info *sn_irq_info; unsigned long size; unsigned int bus_no, devfn; pci_dev_get(dev); /* for the sysdata pointer */ - dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL); - if (SN_PCIDEV_INFO(dev) <= 0) + pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL); + if (pcidev_info <= 0) BUG(); /* Cannot afford to run out of memory */ - memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info)); sn_irq_info = kmalloc(sizeof(struct sn_irq_info), GFP_KERNEL); if (sn_irq_info <= 0) @@ -270,22 +334,34 @@ void sn_pci_fixup_slot(struct pci_dev *dev) /* Call to retrieve pci device information needed by kernel. */ status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, dev->devfn, - (u64) __pa(SN_PCIDEV_INFO(dev)), + (u64) __pa(pcidev_info), (u64) __pa(sn_irq_info)); if (status) BUG(); /* Cannot get platform pci device information */ + /* Add pcidev_info to list in sn_pci_controller struct */ + list_add_tail(&pcidev_info->pdi_list, + &(SN_PCI_CONTROLLER(dev->bus)->pcidev_info)); + /* Copy over PIO Mapped Addresses */ for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) { unsigned long start, end, addr; - if (!SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx]) + if (!pcidev_info->pdi_pio_mapped_addr[idx]) { + pci_addrs[idx] = -1; continue; + } start = dev->resource[idx].start; end = dev->resource[idx].end; size = end - start; - addr = SN_PCIDEV_INFO(dev)->pdi_pio_mapped_addr[idx]; + if (size == 0) { + pci_addrs[idx] = -1; + continue; + } + pci_addrs[idx] = start; + count++; + addr = pcidev_info->pdi_pio_mapped_addr[idx]; addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET; dev->resource[idx].start = addr; dev->resource[idx].end = addr + size; @@ -294,23 +370,27 @@ void sn_pci_fixup_slot(struct pci_dev *dev) else dev->resource[idx].parent = &iomem_resource; } + /* Create a pci_window in the pci_controller struct for + * each device resource. + */ + if (count > 0) + sn_pci_window_fixup(dev, count, pci_addrs); /* * Using the PROMs values for the PCI host bus, get the Linux * PCI host_pci_dev struct and set up host bus linkages */ - bus_no = (SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32) & 0xff; - devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff; + bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff; + devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff; host_pci_bus = pci_find_bus(segment, bus_no); host_pci_dev = pci_get_slot(host_pci_bus, devfn); - SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev; - SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info = - SN_PCIDEV_INFO(host_pci_dev); - SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev; + pcidev_info->host_pci_dev = host_pci_dev; + pcidev_info->pdi_linux_pcidev = dev; + pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev); bs = SN_PCIBUS_BUSSOFT(dev->bus); - SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs; + pcidev_info->pdi_pcibus_info = bs; if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) { SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type]; @@ -320,11 +400,11 @@ void sn_pci_fixup_slot(struct pci_dev *dev) /* Only set up IRQ stuff if this device has a host bus context */ if (bs && sn_irq_info->irq_irq) { - SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info; - dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq; + pcidev_info->pdi_sn_irq_info = sn_irq_info; + dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq; sn_irq_fixup(dev, sn_irq_info); } else { - SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL; + pcidev_info->pdi_sn_irq_info = NULL; kfree(sn_irq_info); } } @@ -338,6 +418,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) int status = 0; int nasid, cnode; struct pci_controller *controller; + struct sn_pci_controller *sn_controller; struct pcibus_bussoft *prom_bussoft_ptr; struct hubdev_info *hubdev_info; void *provider_soft = NULL; @@ -349,10 +430,15 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) return; /*bus # does not exist */ prom_bussoft_ptr = __va(prom_bussoft_ptr); - controller = kzalloc(sizeof(struct pci_controller), GFP_KERNEL); + /* Allocate a sn_pci_controller, which has a pci_controller struct + * as the first member. + */ + sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL); + if (!sn_controller) + BUG(); + INIT_LIST_HEAD(&sn_controller->pcidev_info); + controller = &sn_controller->pci_controller; controller->segment = segment; - if (!controller) - BUG(); if (bus == NULL) { bus = pci_scan_bus(busnum, &pci_root_ops, controller); @@ -390,6 +476,29 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) } /* + * Setup pci_windows for legacy IO and MEM space. + * (Temporary until ACPI support is in place.) + */ + controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL); + if (controller->window == NULL) + BUG(); + controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io; + controller->window[0].resource.name = "legacy_io"; + controller->window[0].resource.flags = IORESOURCE_IO; + controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io; + controller->window[0].resource.end = + controller->window[0].resource.start + 0xffff; + controller->window[0].resource.parent = &ioport_resource; + controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem; + controller->window[1].resource.name = "legacy_mem"; + controller->window[1].resource.flags = IORESOURCE_MEM; + controller->window[1].resource.start = prom_bussoft_ptr->bs_legacy_mem; + controller->window[1].resource.end = + controller->window[1].resource.start + (1024 * 1024) - 1; + controller->window[1].resource.parent = &iomem_resource; + controller->windows = 2; + + /* * Generic bus fixup goes here. Don't reference prom_bussoft_ptr * after this point. */ @@ -421,7 +530,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus) error_return: - kfree(controller); + kfree(sn_controller); return; } @@ -434,7 +543,7 @@ void sn_bus_store_sysdata(struct pci_dev *dev) dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__); return; } - element->sysdata = dev->sysdata; + element->sysdata = SN_PCIDEV_INFO(dev); list_add(&element->entry, &sn_sysdata_list); } diff --git a/include/asm-ia64/sn/pcidev.h b/include/asm-ia64/sn/pcidev.h index 49711d0..f65d222 100644 --- a/include/asm-ia64/sn/pcidev.h +++ b/include/asm-ia64/sn/pcidev.h @@ -3,15 +3,27 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 1992 - 1997, 2000-2004 Silicon Graphics, Inc. All rights reserved. + * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved. */ #ifndef _ASM_IA64_SN_PCI_PCIDEV_H #define _ASM_IA64_SN_PCI_PCIDEV_H #include -#define SN_PCIDEV_INFO(pci_dev) \ - ((struct pcidev_info *)(pci_dev)->sysdata) +/* + * In ia64, pci_dev->sysdata must be a *pci_controller. To provide access to + * the pcidev_info structs for all devices under a controller, we extend the + * definition of pci_controller, via sn_pci_controller, to include a list + * of pcidev_info. + */ +struct sn_pci_controller { + struct pci_controller pci_controller; + struct list_head pcidev_info; +}; + +#define SN_PCI_CONTROLLER(dev) ((struct sn_pci_controller *) dev->sysdata) + +#define SN_PCIDEV_INFO(dev) sn_pcidev_info_get(dev) #define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \ (struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data)) @@ -53,11 +65,13 @@ struct pcidev_info { struct sn_irq_info *pdi_sn_irq_info; struct sn_pcibus_provider *pdi_provider; /* sn pci ops */ struct pci_dev *host_pci_dev; /* host bus link */ + struct list_head pdi_list; /* List of pcidev_info */ }; extern void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info); extern void sn_irq_unfixup(struct pci_dev *pci_dev); +extern struct pcidev_info * sn_pcidev_info_get(struct pci_dev *); extern void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus); extern void sn_bus_store_sysdata(struct pci_dev *dev);