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authorLen Brown <len.brown@intel.com>2011-01-12 05:02:22 -0500
committerLen Brown <len.brown@intel.com>2011-01-12 05:02:22 -0500
commit03b6e6e58d9dd5f3068288653810db3c15fde929 (patch)
treeb6edb300df2e230230f1f7428ffa54f27b0a040d /drivers/acpi
parent9e0c20bceb611917a7546172ac617d07e5af0cfa (diff)
parent81e88fdc432a1552401d6e91a984dcccce72b8dc (diff)
downloadlinux-linaro-android-03b6e6e58d9dd5f3068288653810db3c15fde929.tar.gz
Merge branch 'apei' into release
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/apei/apei-internal.h2
-rw-r--r--drivers/acpi/apei/cper.c311
-rw-r--r--drivers/acpi/apei/ghes.c431
3 files changed, 656 insertions, 88 deletions
diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index 18df1e94027..ef0581f2094 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -109,6 +109,8 @@ static inline u32 apei_estatus_len(struct acpi_hest_generic_status *estatus)
return sizeof(*estatus) + estatus->data_length;
}
+void apei_estatus_print(const char *pfx,
+ const struct acpi_hest_generic_status *estatus);
int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus);
int apei_estatus_check(const struct acpi_hest_generic_status *estatus);
#endif
diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c
index f4cf2fc4c8c..31464a006d7 100644
--- a/drivers/acpi/apei/cper.c
+++ b/drivers/acpi/apei/cper.c
@@ -46,6 +46,317 @@ u64 cper_next_record_id(void)
}
EXPORT_SYMBOL_GPL(cper_next_record_id);
+static const char *cper_severity_strs[] = {
+ "recoverable",
+ "fatal",
+ "corrected",
+ "info",
+};
+
+static const char *cper_severity_str(unsigned int severity)
+{
+ return severity < ARRAY_SIZE(cper_severity_strs) ?
+ cper_severity_strs[severity] : "unknown";
+}
+
+/*
+ * cper_print_bits - print strings for set bits
+ * @pfx: prefix for each line, including log level and prefix string
+ * @bits: bit mask
+ * @strs: string array, indexed by bit position
+ * @strs_size: size of the string array: @strs
+ *
+ * For each set bit in @bits, print the corresponding string in @strs.
+ * If the output length is longer than 80, multiple line will be
+ * printed, with @pfx is printed at the beginning of each line.
+ */
+static void cper_print_bits(const char *pfx, unsigned int bits,
+ const char *strs[], unsigned int strs_size)
+{
+ int i, len = 0;
+ const char *str;
+ char buf[84];
+
+ for (i = 0; i < strs_size; i++) {
+ if (!(bits & (1U << i)))
+ continue;
+ str = strs[i];
+ if (len && len + strlen(str) + 2 > 80) {
+ printk("%s\n", buf);
+ len = 0;
+ }
+ if (!len)
+ len = snprintf(buf, sizeof(buf), "%s%s", pfx, str);
+ else
+ len += snprintf(buf+len, sizeof(buf)-len, ", %s", str);
+ }
+ if (len)
+ printk("%s\n", buf);
+}
+
+static const char *cper_proc_type_strs[] = {
+ "IA32/X64",
+ "IA64",
+};
+
+static const char *cper_proc_isa_strs[] = {
+ "IA32",
+ "IA64",
+ "X64",
+};
+
+static const char *cper_proc_error_type_strs[] = {
+ "cache error",
+ "TLB error",
+ "bus error",
+ "micro-architectural error",
+};
+
+static const char *cper_proc_op_strs[] = {
+ "unknown or generic",
+ "data read",
+ "data write",
+ "instruction execution",
+};
+
+static const char *cper_proc_flag_strs[] = {
+ "restartable",
+ "precise IP",
+ "overflow",
+ "corrected",
+};
+
+static void cper_print_proc_generic(const char *pfx,
+ const struct cper_sec_proc_generic *proc)
+{
+ if (proc->validation_bits & CPER_PROC_VALID_TYPE)
+ printk("%s""processor_type: %d, %s\n", pfx, proc->proc_type,
+ proc->proc_type < ARRAY_SIZE(cper_proc_type_strs) ?
+ cper_proc_type_strs[proc->proc_type] : "unknown");
+ if (proc->validation_bits & CPER_PROC_VALID_ISA)
+ printk("%s""processor_isa: %d, %s\n", pfx, proc->proc_isa,
+ proc->proc_isa < ARRAY_SIZE(cper_proc_isa_strs) ?
+ cper_proc_isa_strs[proc->proc_isa] : "unknown");
+ if (proc->validation_bits & CPER_PROC_VALID_ERROR_TYPE) {
+ printk("%s""error_type: 0x%02x\n", pfx, proc->proc_error_type);
+ cper_print_bits(pfx, proc->proc_error_type,
+ cper_proc_error_type_strs,
+ ARRAY_SIZE(cper_proc_error_type_strs));
+ }
+ if (proc->validation_bits & CPER_PROC_VALID_OPERATION)
+ printk("%s""operation: %d, %s\n", pfx, proc->operation,
+ proc->operation < ARRAY_SIZE(cper_proc_op_strs) ?
+ cper_proc_op_strs[proc->operation] : "unknown");
+ if (proc->validation_bits & CPER_PROC_VALID_FLAGS) {
+ printk("%s""flags: 0x%02x\n", pfx, proc->flags);
+ cper_print_bits(pfx, proc->flags, cper_proc_flag_strs,
+ ARRAY_SIZE(cper_proc_flag_strs));
+ }
+ if (proc->validation_bits & CPER_PROC_VALID_LEVEL)
+ printk("%s""level: %d\n", pfx, proc->level);
+ if (proc->validation_bits & CPER_PROC_VALID_VERSION)
+ printk("%s""version_info: 0x%016llx\n", pfx, proc->cpu_version);
+ if (proc->validation_bits & CPER_PROC_VALID_ID)
+ printk("%s""processor_id: 0x%016llx\n", pfx, proc->proc_id);
+ if (proc->validation_bits & CPER_PROC_VALID_TARGET_ADDRESS)
+ printk("%s""target_address: 0x%016llx\n",
+ pfx, proc->target_addr);
+ if (proc->validation_bits & CPER_PROC_VALID_REQUESTOR_ID)
+ printk("%s""requestor_id: 0x%016llx\n",
+ pfx, proc->requestor_id);
+ if (proc->validation_bits & CPER_PROC_VALID_RESPONDER_ID)
+ printk("%s""responder_id: 0x%016llx\n",
+ pfx, proc->responder_id);
+ if (proc->validation_bits & CPER_PROC_VALID_IP)
+ printk("%s""IP: 0x%016llx\n", pfx, proc->ip);
+}
+
+static const char *cper_mem_err_type_strs[] = {
+ "unknown",
+ "no error",
+ "single-bit ECC",
+ "multi-bit ECC",
+ "single-symbol chipkill ECC",
+ "multi-symbol chipkill ECC",
+ "master abort",
+ "target abort",
+ "parity error",
+ "watchdog timeout",
+ "invalid address",
+ "mirror Broken",
+ "memory sparing",
+ "scrub corrected error",
+ "scrub uncorrected error",
+};
+
+static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
+{
+ if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
+ printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
+ if (mem->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS)
+ printk("%s""physical_address: 0x%016llx\n",
+ pfx, mem->physical_addr);
+ if (mem->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS_MASK)
+ printk("%s""physical_address_mask: 0x%016llx\n",
+ pfx, mem->physical_addr_mask);
+ if (mem->validation_bits & CPER_MEM_VALID_NODE)
+ printk("%s""node: %d\n", pfx, mem->node);
+ if (mem->validation_bits & CPER_MEM_VALID_CARD)
+ printk("%s""card: %d\n", pfx, mem->card);
+ if (mem->validation_bits & CPER_MEM_VALID_MODULE)
+ printk("%s""module: %d\n", pfx, mem->module);
+ if (mem->validation_bits & CPER_MEM_VALID_BANK)
+ printk("%s""bank: %d\n", pfx, mem->bank);
+ if (mem->validation_bits & CPER_MEM_VALID_DEVICE)
+ printk("%s""device: %d\n", pfx, mem->device);
+ if (mem->validation_bits & CPER_MEM_VALID_ROW)
+ printk("%s""row: %d\n", pfx, mem->row);
+ if (mem->validation_bits & CPER_MEM_VALID_COLUMN)
+ printk("%s""column: %d\n", pfx, mem->column);
+ if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION)
+ printk("%s""bit_position: %d\n", pfx, mem->bit_pos);
+ if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
+ printk("%s""requestor_id: 0x%016llx\n", pfx, mem->requestor_id);
+ if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
+ printk("%s""responder_id: 0x%016llx\n", pfx, mem->responder_id);
+ if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID)
+ printk("%s""target_id: 0x%016llx\n", pfx, mem->target_id);
+ if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
+ u8 etype = mem->error_type;
+ printk("%s""error_type: %d, %s\n", pfx, etype,
+ etype < ARRAY_SIZE(cper_mem_err_type_strs) ?
+ cper_mem_err_type_strs[etype] : "unknown");
+ }
+}
+
+static const char *cper_pcie_port_type_strs[] = {
+ "PCIe end point",
+ "legacy PCI end point",
+ "unknown",
+ "unknown",
+ "root port",
+ "upstream switch port",
+ "downstream switch port",
+ "PCIe to PCI/PCI-X bridge",
+ "PCI/PCI-X to PCIe bridge",
+ "root complex integrated endpoint device",
+ "root complex event collector",
+};
+
+static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie)
+{
+ if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
+ printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
+ pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
+ cper_pcie_port_type_strs[pcie->port_type] : "unknown");
+ if (pcie->validation_bits & CPER_PCIE_VALID_VERSION)
+ printk("%s""version: %d.%d\n", pfx,
+ pcie->version.major, pcie->version.minor);
+ if (pcie->validation_bits & CPER_PCIE_VALID_COMMAND_STATUS)
+ printk("%s""command: 0x%04x, status: 0x%04x\n", pfx,
+ pcie->command, pcie->status);
+ if (pcie->validation_bits & CPER_PCIE_VALID_DEVICE_ID) {
+ const __u8 *p;
+ printk("%s""device_id: %04x:%02x:%02x.%x\n", pfx,
+ pcie->device_id.segment, pcie->device_id.bus,
+ pcie->device_id.device, pcie->device_id.function);
+ printk("%s""slot: %d\n", pfx,
+ pcie->device_id.slot >> CPER_PCIE_SLOT_SHIFT);
+ printk("%s""secondary_bus: 0x%02x\n", pfx,
+ pcie->device_id.secondary_bus);
+ printk("%s""vendor_id: 0x%04x, device_id: 0x%04x\n", pfx,
+ pcie->device_id.vendor_id, pcie->device_id.device_id);
+ p = pcie->device_id.class_code;
+ printk("%s""class_code: %02x%02x%02x\n", pfx, p[0], p[1], p[2]);
+ }
+ if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER)
+ printk("%s""serial number: 0x%04x, 0x%04x\n", pfx,
+ pcie->serial_number.lower, pcie->serial_number.upper);
+ if (pcie->validation_bits & CPER_PCIE_VALID_BRIDGE_CONTROL_STATUS)
+ printk(
+ "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
+ pfx, pcie->bridge.secondary_status, pcie->bridge.control);
+}
+
+static const char *apei_estatus_section_flag_strs[] = {
+ "primary",
+ "containment warning",
+ "reset",
+ "threshold exceeded",
+ "resource not accessible",
+ "latent error",
+};
+
+static void apei_estatus_print_section(
+ const char *pfx, const struct acpi_hest_generic_data *gdata, int sec_no)
+{
+ uuid_le *sec_type = (uuid_le *)gdata->section_type;
+ __u16 severity;
+
+ severity = gdata->error_severity;
+ printk("%s""section: %d, severity: %d, %s\n", pfx, sec_no, severity,
+ cper_severity_str(severity));
+ printk("%s""flags: 0x%02x\n", pfx, gdata->flags);
+ cper_print_bits(pfx, gdata->flags, apei_estatus_section_flag_strs,
+ ARRAY_SIZE(apei_estatus_section_flag_strs));
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
+ printk("%s""fru_id: %pUl\n", pfx, (uuid_le *)gdata->fru_id);
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
+ printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text);
+
+ if (!uuid_le_cmp(*sec_type, CPER_SEC_PROC_GENERIC)) {
+ struct cper_sec_proc_generic *proc_err = (void *)(gdata + 1);
+ printk("%s""section_type: general processor error\n", pfx);
+ if (gdata->error_data_length >= sizeof(*proc_err))
+ cper_print_proc_generic(pfx, proc_err);
+ else
+ goto err_section_too_small;
+ } else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
+ struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
+ printk("%s""section_type: memory error\n", pfx);
+ if (gdata->error_data_length >= sizeof(*mem_err))
+ cper_print_mem(pfx, mem_err);
+ else
+ goto err_section_too_small;
+ } else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {
+ struct cper_sec_pcie *pcie = (void *)(gdata + 1);
+ printk("%s""section_type: PCIe error\n", pfx);
+ if (gdata->error_data_length >= sizeof(*pcie))
+ cper_print_pcie(pfx, pcie);
+ else
+ goto err_section_too_small;
+ } else
+ printk("%s""section type: unknown, %pUl\n", pfx, sec_type);
+
+ return;
+
+err_section_too_small:
+ pr_err(FW_WARN "error section length is too small\n");
+}
+
+void apei_estatus_print(const char *pfx,
+ const struct acpi_hest_generic_status *estatus)
+{
+ struct acpi_hest_generic_data *gdata;
+ unsigned int data_len, gedata_len;
+ int sec_no = 0;
+ __u16 severity;
+
+ printk("%s""APEI generic hardware error status\n", pfx);
+ severity = estatus->error_severity;
+ printk("%s""severity: %d, %s\n", pfx, severity,
+ cper_severity_str(severity));
+ data_len = estatus->data_length;
+ gdata = (struct acpi_hest_generic_data *)(estatus + 1);
+ while (data_len > sizeof(*gdata)) {
+ gedata_len = gdata->error_data_length;
+ apei_estatus_print_section(pfx, gdata, sec_no);
+ data_len -= gedata_len + sizeof(*gdata);
+ sec_no++;
+ }
+}
+EXPORT_SYMBOL_GPL(apei_estatus_print);
+
int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus)
{
if (estatus->data_length &&
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 0d505e59214..d1d484d4a06 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -12,10 +12,6 @@
* For more information about Generic Hardware Error Source, please
* refer to ACPI Specification version 4.0, section 17.3.2.6
*
- * Now, only SCI notification type and memory errors are
- * supported. More notification type and hardware error type will be
- * added later.
- *
* Copyright 2010 Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
*
@@ -39,14 +35,18 @@
#include <linux/acpi.h>
#include <linux/io.h>
#include <linux/interrupt.h>
+#include <linux/timer.h>
#include <linux/cper.h>
#include <linux/kdebug.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
+#include <linux/ratelimit.h>
+#include <linux/vmalloc.h>
#include <acpi/apei.h>
#include <acpi/atomicio.h>
#include <acpi/hed.h>
#include <asm/mce.h>
+#include <asm/tlbflush.h>
#include "apei-internal.h"
@@ -55,42 +55,131 @@
#define GHES_ESTATUS_MAX_SIZE 65536
/*
- * One struct ghes is created for each generic hardware error
- * source.
- *
+ * One struct ghes is created for each generic hardware error source.
* It provides the context for APEI hardware error timer/IRQ/SCI/NMI
- * handler. Handler for one generic hardware error source is only
- * triggered after the previous one is done. So handler can uses
- * struct ghes without locking.
+ * handler.
*
* estatus: memory buffer for error status block, allocated during
* HEST parsing.
*/
#define GHES_TO_CLEAR 0x0001
+#define GHES_EXITING 0x0002
struct ghes {
struct acpi_hest_generic *generic;
struct acpi_hest_generic_status *estatus;
- struct list_head list;
u64 buffer_paddr;
unsigned long flags;
+ union {
+ struct list_head list;
+ struct timer_list timer;
+ unsigned int irq;
+ };
};
+static int ghes_panic_timeout __read_mostly = 30;
+
/*
- * Error source lists, one list for each notification method. The
- * members in lists are struct ghes.
+ * All error sources notified with SCI shares one notifier function,
+ * so they need to be linked and checked one by one. This is applied
+ * to NMI too.
*
- * The list members are only added in HEST parsing and deleted during
- * module_exit, that is, single-threaded. So no lock is needed for
- * that.
- *
- * But the mutual exclusion is needed between members adding/deleting
- * and timer/IRQ/SCI/NMI handler, which may traverse the list. RCU is
- * used for that.
+ * RCU is used for these lists, so ghes_list_mutex is only used for
+ * list changing, not for traversing.
*/
static LIST_HEAD(ghes_sci);
+static LIST_HEAD(ghes_nmi);
static DEFINE_MUTEX(ghes_list_mutex);
+/*
+ * NMI may be triggered on any CPU, so ghes_nmi_lock is used for
+ * mutual exclusion.
+ */
+static DEFINE_RAW_SPINLOCK(ghes_nmi_lock);
+
+/*
+ * Because the memory area used to transfer hardware error information
+ * from BIOS to Linux can be determined only in NMI, IRQ or timer
+ * handler, but general ioremap can not be used in atomic context, so
+ * a special version of atomic ioremap is implemented for that.
+ */
+
+/*
+ * Two virtual pages are used, one for NMI context, the other for
+ * IRQ/PROCESS context
+ */
+#define GHES_IOREMAP_PAGES 2
+#define GHES_IOREMAP_NMI_PAGE(base) (base)
+#define GHES_IOREMAP_IRQ_PAGE(base) ((base) + PAGE_SIZE)
+
+/* virtual memory area for atomic ioremap */
+static struct vm_struct *ghes_ioremap_area;
+/*
+ * These 2 spinlock is used to prevent atomic ioremap virtual memory
+ * area from being mapped simultaneously.
+ */
+static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi);
+static DEFINE_SPINLOCK(ghes_ioremap_lock_irq);
+
+static int ghes_ioremap_init(void)
+{
+ ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES,
+ VM_IOREMAP, VMALLOC_START, VMALLOC_END);
+ if (!ghes_ioremap_area) {
+ pr_err(GHES_PFX "Failed to allocate virtual memory area for atomic ioremap.\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void ghes_ioremap_exit(void)
+{
+ free_vm_area(ghes_ioremap_area);
+}
+
+static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn)
+{
+ unsigned long vaddr;
+
+ vaddr = (unsigned long)GHES_IOREMAP_NMI_PAGE(ghes_ioremap_area->addr);
+ ioremap_page_range(vaddr, vaddr + PAGE_SIZE,
+ pfn << PAGE_SHIFT, PAGE_KERNEL);
+
+ return (void __iomem *)vaddr;
+}
+
+static void __iomem *ghes_ioremap_pfn_irq(u64 pfn)
+{
+ unsigned long vaddr;
+
+ vaddr = (unsigned long)GHES_IOREMAP_IRQ_PAGE(ghes_ioremap_area->addr);
+ ioremap_page_range(vaddr, vaddr + PAGE_SIZE,
+ pfn << PAGE_SHIFT, PAGE_KERNEL);
+
+ return (void __iomem *)vaddr;
+}
+
+static void ghes_iounmap_nmi(void __iomem *vaddr_ptr)
+{
+ unsigned long vaddr = (unsigned long __force)vaddr_ptr;
+ void *base = ghes_ioremap_area->addr;
+
+ BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_NMI_PAGE(base));
+ unmap_kernel_range_noflush(vaddr, PAGE_SIZE);
+ __flush_tlb_one(vaddr);
+}
+
+static void ghes_iounmap_irq(void __iomem *vaddr_ptr)
+{
+ unsigned long vaddr = (unsigned long __force)vaddr_ptr;
+ void *base = ghes_ioremap_area->addr;
+
+ BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_IRQ_PAGE(base));
+ unmap_kernel_range_noflush(vaddr, PAGE_SIZE);
+ __flush_tlb_one(vaddr);
+}
+
static struct ghes *ghes_new(struct acpi_hest_generic *generic)
{
struct ghes *ghes;
@@ -101,7 +190,6 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic)
if (!ghes)
return ERR_PTR(-ENOMEM);
ghes->generic = generic;
- INIT_LIST_HEAD(&ghes->list);
rc = acpi_pre_map_gar(&generic->error_status_address);
if (rc)
goto err_free;
@@ -158,22 +246,41 @@ static inline int ghes_severity(int severity)
}
}
-/* SCI handler run in work queue, so ioremap can be used here */
-static int ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
- int from_phys)
+static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len,
+ int from_phys)
{
- void *vaddr;
-
- vaddr = ioremap_cache(paddr, len);
- if (!vaddr)
- return -ENOMEM;
- if (from_phys)
- memcpy(buffer, vaddr, len);
- else
- memcpy(vaddr, buffer, len);
- iounmap(vaddr);
-
- return 0;
+ void __iomem *vaddr;
+ unsigned long flags = 0;
+ int in_nmi = in_nmi();
+ u64 offset;
+ u32 trunk;
+
+ while (len > 0) {
+ offset = paddr - (paddr & PAGE_MASK);
+ if (in_nmi) {
+ raw_spin_lock(&ghes_ioremap_lock_nmi);
+ vaddr = ghes_ioremap_pfn_nmi(paddr >> PAGE_SHIFT);
+ } else {
+ spin_lock_irqsave(&ghes_ioremap_lock_irq, flags);
+ vaddr = ghes_ioremap_pfn_irq(paddr >> PAGE_SHIFT);
+ }
+ trunk = PAGE_SIZE - offset;
+ trunk = min(trunk, len);
+ if (from_phys)
+ memcpy_fromio(buffer, vaddr + offset, trunk);
+ else
+ memcpy_toio(vaddr + offset, buffer, trunk);
+ len -= trunk;
+ paddr += trunk;
+ buffer += trunk;
+ if (in_nmi) {
+ ghes_iounmap_nmi(vaddr);
+ raw_spin_unlock(&ghes_ioremap_lock_nmi);
+ } else {
+ ghes_iounmap_irq(vaddr);
+ spin_unlock_irqrestore(&ghes_ioremap_lock_irq, flags);
+ }
+ }
}
static int ghes_read_estatus(struct ghes *ghes, int silent)
@@ -194,10 +301,8 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
if (!buf_paddr)
return -ENOENT;
- rc = ghes_copy_tofrom_phys(ghes->estatus, buf_paddr,
- sizeof(*ghes->estatus), 1);
- if (rc)
- return rc;
+ ghes_copy_tofrom_phys(ghes->estatus, buf_paddr,
+ sizeof(*ghes->estatus), 1);
if (!ghes->estatus->block_status)
return -ENOENT;
@@ -212,17 +317,15 @@ static int ghes_read_estatus(struct ghes *ghes, int silent)
goto err_read_block;
if (apei_estatus_check_header(ghes->estatus))
goto err_read_block;
- rc = ghes_copy_tofrom_phys(ghes->estatus + 1,
- buf_paddr + sizeof(*ghes->estatus),
- len - sizeof(*ghes->estatus), 1);
- if (rc)
- return rc;
+ ghes_copy_tofrom_phys(ghes->estatus + 1,
+ buf_paddr + sizeof(*ghes->estatus),
+ len - sizeof(*ghes->estatus), 1);
if (apei_estatus_check(ghes->estatus))
goto err_read_block;
rc = 0;
err_read_block:
- if (rc && !silent)
+ if (rc && !silent && printk_ratelimit())
pr_warning(FW_WARN GHES_PFX
"Failed to read error status block!\n");
return rc;
@@ -255,11 +358,26 @@ static void ghes_do_proc(struct ghes *ghes)
}
#endif
}
+}
- if (!processed && printk_ratelimit())
- pr_warning(GHES_PFX
- "Unknown error record from generic hardware error source: %d\n",
- ghes->generic->header.source_id);
+static void ghes_print_estatus(const char *pfx, struct ghes *ghes)
+{
+ /* Not more than 2 messages every 5 seconds */
+ static DEFINE_RATELIMIT_STATE(ratelimit, 5*HZ, 2);
+
+ if (pfx == NULL) {
+ if (ghes_severity(ghes->estatus->error_severity) <=
+ GHES_SEV_CORRECTED)
+ pfx = KERN_WARNING HW_ERR;
+ else
+ pfx = KERN_ERR HW_ERR;
+ }
+ if (__ratelimit(&ratelimit)) {
+ printk(
+ "%s""Hardware error from APEI Generic Hardware Error Source: %d\n",
+ pfx, ghes->generic->header.source_id);
+ apei_estatus_print(pfx, ghes->estatus);
+ }
}
static int ghes_proc(struct ghes *ghes)
@@ -269,6 +387,7 @@ static int ghes_proc(struct ghes *ghes)
rc = ghes_read_estatus(ghes, 0);
if (rc)
goto out;
+ ghes_print_estatus(NULL, ghes);
ghes_do_proc(ghes);
out:
@@ -276,6 +395,42 @@ out:
return 0;
}
+static void ghes_add_timer(struct ghes *ghes)
+{
+ struct acpi_hest_generic *g = ghes->generic;
+ unsigned long expire;
+
+ if (!g->notify.poll_interval) {
+ pr_warning(FW_WARN GHES_PFX "Poll interval is 0 for generic hardware error source: %d, disabled.\n",
+ g->header.source_id);
+ return;
+ }
+ expire = jiffies + msecs_to_jiffies(g->notify.poll_interval);
+ ghes->timer.expires = round_jiffies_relative(expire);
+ add_timer(&ghes->timer);
+}
+
+static void ghes_poll_func(unsigned long data)
+{
+ struct ghes *ghes = (void *)data;
+
+ ghes_proc(ghes);
+ if (!(ghes->flags & GHES_EXITING))
+ ghes_add_timer(ghes);
+}
+
+static irqreturn_t ghes_irq_func(int irq, void *data)
+{
+ struct ghes *ghes = data;
+ int rc;
+
+ rc = ghes_proc(ghes);
+ if (rc)
+ return IRQ_NONE;
+
+ return IRQ_HANDLED;
+}
+
static int ghes_notify_sci(struct notifier_block *this,
unsigned long event, void *data)
{
@@ -292,10 +447,63 @@ static int ghes_notify_sci(struct notifier_block *this,
return ret;
}
+static int ghes_notify_nmi(struct notifier_block *this,
+ unsigned long cmd, void *data)
+{
+ struct ghes *ghes, *ghes_global = NULL;
+ int sev, sev_global = -1;
+ int ret = NOTIFY_DONE;
+
+ if (cmd != DIE_NMI)
+ return ret;
+
+ raw_spin_lock(&ghes_nmi_lock);
+ list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
+ if (ghes_read_estatus(ghes, 1)) {
+ ghes_clear_estatus(ghes);
+ continue;
+ }
+ sev = ghes_severity(ghes->estatus->error_severity);
+ if (sev > sev_global) {
+ sev_global = sev;
+ ghes_global = ghes;
+ }
+ ret = NOTIFY_STOP;
+ }
+
+ if (ret == NOTIFY_DONE)
+ goto out;
+
+ if (sev_global >= GHES_SEV_PANIC) {
+ oops_begin();
+ ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global);
+ /* reboot to log the error! */
+ if (panic_timeout == 0)
+ panic_timeout = ghes_panic_timeout;
+ panic("Fatal hardware error!");
+ }
+
+ list_for_each_entry_rcu(ghes, &ghes_nmi, list) {
+ if (!(ghes->flags & GHES_TO_CLEAR))
+ continue;
+ /* Do not print estatus because printk is not NMI safe */
+ ghes_do_proc(ghes);
+ ghes_clear_estatus(ghes);
+ }
+
+out:
+ raw_spin_unlock(&ghes_nmi_lock);
+ return ret;
+}
+
static struct notifier_block ghes_notifier_sci = {
.notifier_call = ghes_notify_sci,
};
+static struct notifier_block ghes_notifier_nmi = {
+ .notifier_call = ghes_notify_nmi,
+};
+
static int __devinit ghes_probe(struct platform_device *ghes_dev)
{
struct acpi_hest_generic *generic;
@@ -306,18 +514,27 @@ static int __devinit ghes_probe(struct platform_device *ghes_dev)
if (!generic->enabled)
return -ENODEV;
- if (generic->error_block_length <
- sizeof(struct acpi_hest_generic_status)) {
- pr_warning(FW_BUG GHES_PFX
-"Invalid error block length: %u for generic hardware error source: %d\n",
- generic->error_block_length,
+ switch (generic->notify.type) {
+ case ACPI_HEST_NOTIFY_POLLED:
+ case ACPI_HEST_NOTIFY_EXTERNAL:
+ case ACPI_HEST_NOTIFY_SCI:
+ case ACPI_HEST_NOTIFY_NMI:
+ break;
+ case ACPI_HEST_NOTIFY_LOCAL:
+ pr_warning(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n",
generic->header.source_id);
goto err;
+ default:
+ pr_warning(FW_WARN GHES_PFX "Unknown notification type: %u for generic hardware error source: %d\n",
+ generic->notify.type, generic->header.source_id);
+ goto err;
}
- if (generic->records_to_preallocate == 0) {
- pr_warning(FW_BUG GHES_PFX
-"Invalid records to preallocate: %u for generic hardware error source: %d\n",
- generic->records_to_preallocate,
+
+ rc = -EIO;
+ if (generic->error_block_length <
+ sizeof(struct acpi_hest_generic_status)) {
+ pr_warning(FW_BUG GHES_PFX "Invalid error block length: %u for generic hardware error source: %d\n",
+ generic->error_block_length,
generic->header.source_id);
goto err;
}
@@ -327,38 +544,43 @@ static int __devinit ghes_probe(struct platform_device *ghes_dev)
ghes = NULL;
goto err;
}
- if (generic->notify.type == ACPI_HEST_NOTIFY_SCI) {
+ switch (generic->notify.type) {
+ case ACPI_HEST_NOTIFY_POLLED:
+ ghes->timer.function = ghes_poll_func;
+ ghes->timer.data = (unsigned long)ghes;
+ init_timer_deferrable(&ghes->timer);
+ ghes_add_timer(ghes);
+ break;
+ case ACPI_HEST_NOTIFY_EXTERNAL:
+ /* External interrupt vector is GSI */
+ if (acpi_gsi_to_irq(generic->notify.vector, &ghes->irq)) {
+ pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n",
+ generic->header.source_id);
+ goto err;
+ }
+ if (request_irq(ghes->irq, ghes_irq_func,
+ 0, "GHES IRQ", ghes)) {
+ pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n",
+ generic->header.source_id);
+ goto err;
+ }
+ break;
+ case ACPI_HEST_NOTIFY_SCI:
mutex_lock(&ghes_list_mutex);
if (list_empty(&ghes_sci))
register_acpi_hed_notifier(&ghes_notifier_sci);
list_add_rcu(&ghes->list, &ghes_sci);
mutex_unlock(&ghes_list_mutex);
- } else {
- unsigned char *notify = NULL;
-
- switch (generic->notify.type) {
- case ACPI_HEST_NOTIFY_POLLED:
- notify = "POLL";
- break;
- case ACPI_HEST_NOTIFY_EXTERNAL:
- case ACPI_HEST_NOTIFY_LOCAL:
- notify = "IRQ";
- break;
- case ACPI_HEST_NOTIFY_NMI:
- notify = "NMI";
- break;
- }
- if (notify) {
- pr_warning(GHES_PFX
-"Generic hardware error source: %d notified via %s is not supported!\n",
- generic->header.source_id, notify);
- } else {
- pr_warning(FW_WARN GHES_PFX
-"Unknown notification type: %u for generic hardware error source: %d\n",
- generic->notify.type, generic->header.source_id);
- }
- rc = -ENODEV;
- goto err;
+ break;
+ case ACPI_HEST_NOTIFY_NMI:
+ mutex_lock(&ghes_list_mutex);
+ if (list_empty(&ghes_nmi))
+ register_die_notifier(&ghes_notifier_nmi);
+ list_add_rcu(&ghes->list, &ghes_nmi);
+ mutex_unlock(&ghes_list_mutex);
+ break;
+ default:
+ BUG();
}
platform_set_drvdata(ghes_dev, ghes);
@@ -379,7 +601,14 @@ static int __devexit ghes_remove(struct platform_device *ghes_dev)
ghes = platform_get_drvdata(ghes_dev);
generic = ghes->generic;
+ ghes->flags |= GHES_EXITING;
switch (generic->notify.type) {
+ case ACPI_HEST_NOTIFY_POLLED:
+ del_timer_sync(&ghes->timer);
+ break;
+ case ACPI_HEST_NOTIFY_EXTERNAL:
+ free_irq(ghes->irq, ghes);
+ break;
case ACPI_HEST_NOTIFY_SCI:
mutex_lock(&ghes_list_mutex);
list_del_rcu(&ghes->list);
@@ -387,12 +616,23 @@ static int __devexit ghes_remove(struct platform_device *ghes_dev)
unregister_acpi_hed_notifier(&ghes_notifier_sci);
mutex_unlock(&ghes_list_mutex);
break;
+ case ACPI_HEST_NOTIFY_NMI:
+ mutex_lock(&ghes_list_mutex);
+ list_del_rcu(&ghes->list);
+ if (list_empty(&ghes_nmi))
+ unregister_die_notifier(&ghes_notifier_nmi);
+ mutex_unlock(&ghes_list_mutex);
+ /*
+ * To synchronize with NMI handler, ghes can only be
+ * freed after NMI handler finishes.
+ */
+ synchronize_rcu();
+ break;
default:
BUG();
break;
}
- synchronize_rcu();
ghes_fini(ghes);
kfree(ghes);
@@ -412,6 +652,8 @@ static struct platform_driver ghes_platform_driver = {
static int __init ghes_init(void)
{
+ int rc;
+
if (acpi_disabled)
return -ENODEV;
@@ -420,12 +662,25 @@ static int __init ghes_init(void)
return -EINVAL;
}
- return platform_driver_register(&ghes_platform_driver);
+ rc = ghes_ioremap_init();
+ if (rc)
+ goto err;
+
+ rc = platform_driver_register(&ghes_platform_driver);
+ if (rc)
+ goto err_ioremap_exit;
+
+ return 0;
+err_ioremap_exit:
+ ghes_ioremap_exit();
+err:
+ return rc;
}
static void __exit ghes_exit(void)
{
platform_driver_unregister(&ghes_platform_driver);
+ ghes_ioremap_exit();
}
module_init(ghes_init);