forked from Minki/linux
186f43608a
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Note that some bool/obj-y instances remain since module.h is the header for some exception table entry stuff, and for things like __init_or_module (code that is tossed when MODULES=n). Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-4-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
296 lines
7.4 KiB
C
296 lines
7.4 KiB
C
/*
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* Shared support code for AMD K8 northbridges and derivates.
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* Copyright 2006 Andi Kleen, SUSE Labs. Subject to GPLv2.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/spinlock.h>
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#include <asm/amd_nb.h>
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static u32 *flush_words;
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const struct pci_device_id amd_nb_misc_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F3) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F3) },
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{}
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};
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EXPORT_SYMBOL(amd_nb_misc_ids);
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static const struct pci_device_id amd_nb_link_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F4) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M30H_NB_F4) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M60H_NB_F4) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F4) },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_M30H_NB_F4) },
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{}
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};
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const struct amd_nb_bus_dev_range amd_nb_bus_dev_ranges[] __initconst = {
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{ 0x00, 0x18, 0x20 },
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{ 0xff, 0x00, 0x20 },
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{ 0xfe, 0x00, 0x20 },
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{ }
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};
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struct amd_northbridge_info amd_northbridges;
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EXPORT_SYMBOL(amd_northbridges);
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static struct pci_dev *next_northbridge(struct pci_dev *dev,
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const struct pci_device_id *ids)
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{
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do {
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dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
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if (!dev)
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break;
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} while (!pci_match_id(ids, dev));
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return dev;
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}
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int amd_cache_northbridges(void)
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{
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u16 i = 0;
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struct amd_northbridge *nb;
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struct pci_dev *misc, *link;
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if (amd_nb_num())
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return 0;
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misc = NULL;
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while ((misc = next_northbridge(misc, amd_nb_misc_ids)) != NULL)
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i++;
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if (!i)
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return -ENODEV;
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nb = kzalloc(i * sizeof(struct amd_northbridge), GFP_KERNEL);
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if (!nb)
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return -ENOMEM;
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amd_northbridges.nb = nb;
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amd_northbridges.num = i;
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link = misc = NULL;
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for (i = 0; i != amd_nb_num(); i++) {
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node_to_amd_nb(i)->misc = misc =
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next_northbridge(misc, amd_nb_misc_ids);
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node_to_amd_nb(i)->link = link =
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next_northbridge(link, amd_nb_link_ids);
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}
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if (amd_gart_present())
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amd_northbridges.flags |= AMD_NB_GART;
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/*
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* Check for L3 cache presence.
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*/
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if (!cpuid_edx(0x80000006))
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return 0;
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/*
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* Some CPU families support L3 Cache Index Disable. There are some
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* limitations because of E382 and E388 on family 0x10.
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*/
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if (boot_cpu_data.x86 == 0x10 &&
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boot_cpu_data.x86_model >= 0x8 &&
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(boot_cpu_data.x86_model > 0x9 ||
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boot_cpu_data.x86_mask >= 0x1))
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amd_northbridges.flags |= AMD_NB_L3_INDEX_DISABLE;
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if (boot_cpu_data.x86 == 0x15)
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amd_northbridges.flags |= AMD_NB_L3_INDEX_DISABLE;
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/* L3 cache partitioning is supported on family 0x15 */
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if (boot_cpu_data.x86 == 0x15)
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amd_northbridges.flags |= AMD_NB_L3_PARTITIONING;
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return 0;
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}
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EXPORT_SYMBOL_GPL(amd_cache_northbridges);
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/*
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* Ignores subdevice/subvendor but as far as I can figure out
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* they're useless anyways
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*/
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bool __init early_is_amd_nb(u32 device)
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{
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const struct pci_device_id *id;
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u32 vendor = device & 0xffff;
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device >>= 16;
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for (id = amd_nb_misc_ids; id->vendor; id++)
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if (vendor == id->vendor && device == id->device)
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return true;
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return false;
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}
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struct resource *amd_get_mmconfig_range(struct resource *res)
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{
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u32 address;
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u64 base, msr;
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unsigned segn_busn_bits;
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if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
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return NULL;
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/* assume all cpus from fam10h have mmconfig */
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if (boot_cpu_data.x86 < 0x10)
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return NULL;
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address = MSR_FAM10H_MMIO_CONF_BASE;
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rdmsrl(address, msr);
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/* mmconfig is not enabled */
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if (!(msr & FAM10H_MMIO_CONF_ENABLE))
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return NULL;
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base = msr & (FAM10H_MMIO_CONF_BASE_MASK<<FAM10H_MMIO_CONF_BASE_SHIFT);
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segn_busn_bits = (msr >> FAM10H_MMIO_CONF_BUSRANGE_SHIFT) &
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FAM10H_MMIO_CONF_BUSRANGE_MASK;
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res->flags = IORESOURCE_MEM;
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res->start = base;
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res->end = base + (1ULL<<(segn_busn_bits + 20)) - 1;
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return res;
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}
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int amd_get_subcaches(int cpu)
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{
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struct pci_dev *link = node_to_amd_nb(amd_get_nb_id(cpu))->link;
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unsigned int mask;
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if (!amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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return 0;
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pci_read_config_dword(link, 0x1d4, &mask);
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return (mask >> (4 * cpu_data(cpu).cpu_core_id)) & 0xf;
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}
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int amd_set_subcaches(int cpu, unsigned long mask)
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{
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static unsigned int reset, ban;
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struct amd_northbridge *nb = node_to_amd_nb(amd_get_nb_id(cpu));
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unsigned int reg;
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int cuid;
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if (!amd_nb_has_feature(AMD_NB_L3_PARTITIONING) || mask > 0xf)
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return -EINVAL;
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/* if necessary, collect reset state of L3 partitioning and BAN mode */
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if (reset == 0) {
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pci_read_config_dword(nb->link, 0x1d4, &reset);
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pci_read_config_dword(nb->misc, 0x1b8, &ban);
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ban &= 0x180000;
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}
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/* deactivate BAN mode if any subcaches are to be disabled */
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if (mask != 0xf) {
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pci_read_config_dword(nb->misc, 0x1b8, ®);
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pci_write_config_dword(nb->misc, 0x1b8, reg & ~0x180000);
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}
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cuid = cpu_data(cpu).cpu_core_id;
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mask <<= 4 * cuid;
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mask |= (0xf ^ (1 << cuid)) << 26;
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pci_write_config_dword(nb->link, 0x1d4, mask);
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/* reset BAN mode if L3 partitioning returned to reset state */
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pci_read_config_dword(nb->link, 0x1d4, ®);
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if (reg == reset) {
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pci_read_config_dword(nb->misc, 0x1b8, ®);
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reg &= ~0x180000;
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pci_write_config_dword(nb->misc, 0x1b8, reg | ban);
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}
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return 0;
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}
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static int amd_cache_gart(void)
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{
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u16 i;
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if (!amd_nb_has_feature(AMD_NB_GART))
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return 0;
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flush_words = kmalloc(amd_nb_num() * sizeof(u32), GFP_KERNEL);
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if (!flush_words) {
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amd_northbridges.flags &= ~AMD_NB_GART;
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return -ENOMEM;
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}
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for (i = 0; i != amd_nb_num(); i++)
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pci_read_config_dword(node_to_amd_nb(i)->misc, 0x9c,
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&flush_words[i]);
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return 0;
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}
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void amd_flush_garts(void)
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{
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int flushed, i;
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unsigned long flags;
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static DEFINE_SPINLOCK(gart_lock);
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if (!amd_nb_has_feature(AMD_NB_GART))
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return;
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/* Avoid races between AGP and IOMMU. In theory it's not needed
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but I'm not sure if the hardware won't lose flush requests
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when another is pending. This whole thing is so expensive anyways
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that it doesn't matter to serialize more. -AK */
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spin_lock_irqsave(&gart_lock, flags);
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flushed = 0;
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for (i = 0; i < amd_nb_num(); i++) {
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pci_write_config_dword(node_to_amd_nb(i)->misc, 0x9c,
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flush_words[i] | 1);
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flushed++;
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}
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for (i = 0; i < amd_nb_num(); i++) {
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u32 w;
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/* Make sure the hardware actually executed the flush*/
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for (;;) {
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pci_read_config_dword(node_to_amd_nb(i)->misc,
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0x9c, &w);
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if (!(w & 1))
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break;
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cpu_relax();
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}
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}
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spin_unlock_irqrestore(&gart_lock, flags);
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if (!flushed)
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pr_notice("nothing to flush?\n");
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}
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EXPORT_SYMBOL_GPL(amd_flush_garts);
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static __init int init_amd_nbs(void)
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{
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int err = 0;
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err = amd_cache_northbridges();
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if (err < 0)
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pr_notice("Cannot enumerate AMD northbridges\n");
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if (amd_cache_gart() < 0)
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pr_notice("Cannot initialize GART flush words, GART support disabled\n");
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return err;
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}
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/* This has to go after the PCI subsystem */
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fs_initcall(init_amd_nbs);
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