![Tejun Heo](/assets/img/avatar_default.png)
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
291 lines
6.5 KiB
C
291 lines
6.5 KiB
C
/*
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* linux/arch/powerpc/platforms/cell/cell_setup.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Adapted from 'alpha' version by Gary Thomas
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* Modified by Cort Dougan (cort@cs.nmt.edu)
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* Modified by PPC64 Team, IBM Corp
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* Modified by Cell Team, IBM Deutschland Entwicklung GmbH
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/user.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/console.h>
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#include <linux/mutex.h>
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#include <linux/memory_hotplug.h>
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#include <linux/of_platform.h>
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#include <asm/mmu.h>
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/pci-bridge.h>
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#include <asm/iommu.h>
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#include <asm/dma.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/nvram.h>
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#include <asm/cputable.h>
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#include <asm/ppc-pci.h>
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#include <asm/irq.h>
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#include <asm/spu.h>
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#include <asm/spu_priv1.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <asm/cell-regs.h>
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#include "interrupt.h"
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#include "pervasive.h"
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#include "ras.h"
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#include "io-workarounds.h"
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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static void cell_show_cpuinfo(struct seq_file *m)
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{
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struct device_node *root;
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const char *model = "";
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root = of_find_node_by_path("/");
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if (root)
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model = of_get_property(root, "model", NULL);
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seq_printf(m, "machine\t\t: CHRP %s\n", model);
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of_node_put(root);
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}
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static void cell_progress(char *s, unsigned short hex)
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{
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printk("*** %04x : %s\n", hex, s ? s : "");
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}
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static void cell_fixup_pcie_rootcomplex(struct pci_dev *dev)
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{
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struct pci_controller *hose;
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const char *s;
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int i;
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if (!machine_is(cell))
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return;
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/* We're searching for a direct child of the PHB */
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if (dev->bus->self != NULL || dev->devfn != 0)
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return;
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hose = pci_bus_to_host(dev->bus);
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if (hose == NULL)
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return;
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/* Only on PCIE */
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if (!of_device_is_compatible(hose->dn, "pciex"))
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return;
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/* And only on axon */
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s = of_get_property(hose->dn, "model", NULL);
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if (!s || strcmp(s, "Axon") != 0)
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return;
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for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
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dev->resource[i].start = dev->resource[i].end = 0;
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dev->resource[i].flags = 0;
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}
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printk(KERN_DEBUG "PCI: Hiding resources on Axon PCIE RC %s\n",
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pci_name(dev));
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, cell_fixup_pcie_rootcomplex);
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static int __devinit cell_setup_phb(struct pci_controller *phb)
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{
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const char *model;
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struct device_node *np;
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int rc = rtas_setup_phb(phb);
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if (rc)
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return rc;
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np = phb->dn;
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model = of_get_property(np, "model", NULL);
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if (model == NULL || strcmp(np->name, "pci"))
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return 0;
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/* Setup workarounds for spider */
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if (strcmp(model, "Spider"))
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return 0;
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iowa_register_bus(phb, &spiderpci_ops, &spiderpci_iowa_init,
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(void *)SPIDER_PCI_REG_BASE);
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io_workaround_init();
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return 0;
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}
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static int __init cell_publish_devices(void)
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{
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struct device_node *root = of_find_node_by_path("/");
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struct device_node *np;
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int node;
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/* Publish OF platform devices for southbridge IOs */
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of_platform_bus_probe(NULL, NULL, NULL);
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/* On spider based blades, we need to manually create the OF
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* platform devices for the PCI host bridges
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*/
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for_each_child_of_node(root, np) {
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if (np->type == NULL || (strcmp(np->type, "pci") != 0 &&
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strcmp(np->type, "pciex") != 0))
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continue;
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of_platform_device_create(np, NULL, NULL);
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}
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/* There is no device for the MIC memory controller, thus we create
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* a platform device for it to attach the EDAC driver to.
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*/
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for_each_online_node(node) {
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if (cbe_get_cpu_mic_tm_regs(cbe_node_to_cpu(node)) == NULL)
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continue;
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platform_device_register_simple("cbe-mic", node, NULL, 0);
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}
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return 0;
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}
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machine_subsys_initcall(cell, cell_publish_devices);
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static void cell_mpic_cascade(unsigned int irq, struct irq_desc *desc)
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{
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struct mpic *mpic = desc->handler_data;
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unsigned int virq;
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virq = mpic_get_one_irq(mpic);
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if (virq != NO_IRQ)
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generic_handle_irq(virq);
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desc->chip->eoi(irq);
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}
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static void __init mpic_init_IRQ(void)
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{
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struct device_node *dn;
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struct mpic *mpic;
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unsigned int virq;
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for (dn = NULL;
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(dn = of_find_node_by_name(dn, "interrupt-controller"));) {
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if (!of_device_is_compatible(dn, "CBEA,platform-open-pic"))
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continue;
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/* The MPIC driver will get everything it needs from the
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* device-tree, just pass 0 to all arguments
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*/
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mpic = mpic_alloc(dn, 0, 0, 0, 0, " MPIC ");
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if (mpic == NULL)
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continue;
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mpic_init(mpic);
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virq = irq_of_parse_and_map(dn, 0);
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if (virq == NO_IRQ)
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continue;
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printk(KERN_INFO "%s : hooking up to IRQ %d\n",
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dn->full_name, virq);
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set_irq_data(virq, mpic);
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set_irq_chained_handler(virq, cell_mpic_cascade);
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}
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}
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static void __init cell_init_irq(void)
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{
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iic_init_IRQ();
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spider_init_IRQ();
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mpic_init_IRQ();
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}
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static void __init cell_set_dabrx(void)
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{
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mtspr(SPRN_DABRX, DABRX_KERNEL | DABRX_USER);
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}
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static void __init cell_setup_arch(void)
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{
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#ifdef CONFIG_SPU_BASE
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spu_priv1_ops = &spu_priv1_mmio_ops;
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spu_management_ops = &spu_management_of_ops;
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#endif
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cbe_regs_init();
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cell_set_dabrx();
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#ifdef CONFIG_CBE_RAS
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cbe_ras_init();
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#endif
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#ifdef CONFIG_SMP
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smp_init_cell();
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#endif
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/* init to some ~sane value until calibrate_delay() runs */
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loops_per_jiffy = 50000000;
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/* Find and initialize PCI host bridges */
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init_pci_config_tokens();
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cbe_pervasive_init();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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mmio_nvram_init();
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}
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static int __init cell_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(root, "IBM,CBEA") &&
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!of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
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return 0;
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hpte_init_native();
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return 1;
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}
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define_machine(cell) {
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.name = "Cell",
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.probe = cell_probe,
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.setup_arch = cell_setup_arch,
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.show_cpuinfo = cell_show_cpuinfo,
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.restart = rtas_restart,
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.power_off = rtas_power_off,
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.halt = rtas_halt,
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.get_boot_time = rtas_get_boot_time,
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.get_rtc_time = rtas_get_rtc_time,
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.set_rtc_time = rtas_set_rtc_time,
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.calibrate_decr = generic_calibrate_decr,
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.progress = cell_progress,
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.init_IRQ = cell_init_irq,
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.pci_setup_phb = cell_setup_phb,
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};
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