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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-07 08:50:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-07 08:50:34 -0700
commitf536b3cae84eb7c9f3495285ad048d13a397ed0b (patch)
treeb53eee1c45eb080168786e2f103e76d6706cbbb0 /arch/powerpc/include/asm/eeh.h
parente669830526a0abaf301bf408df69cde33901ac63 (diff)
parent537e5400a0a05c4efe70e7b372c19cfcd0179362 (diff)
downloadlwn-f536b3cae84eb7c9f3495285ad048d13a397ed0b.tar.gz
lwn-f536b3cae84eb7c9f3495285ad048d13a397ed0b.zip
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Ben Herrenschmidt: "This is the powerpc new goodies for 3.17. The short story: The biggest bit is Michael removing all of pre-POWER4 processor support from the 64-bit kernel. POWER3 and rs64. This gets rid of a ton of old cruft that has been bitrotting in a long while. It was broken for quite a few versions already and nobody noticed. Nobody uses those machines anymore. While at it, he cleaned up a bunch of old dusty cabinets, getting rid of a skeletton or two. Then, we have some base VFIO support for KVM, which allows assigning of PCI devices to KVM guests, support for large 64-bit BARs on "powernv" platforms, support for HMI (Hardware Management Interrupts) on those same platforms, some sparse-vmemmap improvements (for memory hotplug), There is the usual batch of Freescale embedded updates (summary in the merge commit) and fixes here or there, I think that's it for the highlights" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (102 commits) powerpc/eeh: Export eeh_iommu_group_to_pe() powerpc/eeh: Add missing #ifdef CONFIG_IOMMU_API powerpc: Reduce scariness of interrupt frames in stack traces powerpc: start loop at section start of start in vmemmap_populated() powerpc: implement vmemmap_free() powerpc: implement vmemmap_remove_mapping() for BOOK3S powerpc: implement vmemmap_list_free() powerpc: Fail remap_4k_pfn() if PFN doesn't fit inside PTE powerpc/book3s: Fix endianess issue for HMI handling on napping cpus. powerpc/book3s: handle HMIs for cpus in nap mode. powerpc/powernv: Invoke opal call to handle hmi. powerpc/book3s: Add basic infrastructure to handle HMI in Linux. powerpc/iommu: Fix comments with it_page_shift powerpc/powernv: Handle compound PE in config accessors powerpc/powernv: Handle compound PE for EEH powerpc/powernv: Handle compound PE powerpc/powernv: Split ioda_eeh_get_state() powerpc/powernv: Allow to freeze PE powerpc/powernv: Enable M64 aperatus for PHB3 powerpc/eeh: Aux PE data for error log ...
Diffstat (limited to 'arch/powerpc/include/asm/eeh.h')
-rw-r--r--arch/powerpc/include/asm/eeh.h62
1 files changed, 37 insertions, 25 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index fab7743c2640..9983c3d26bca 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -25,6 +25,7 @@
#include <linux/list.h>
#include <linux/string.h>
#include <linux/time.h>
+#include <linux/atomic.h>
struct pci_dev;
struct pci_bus;
@@ -33,10 +34,11 @@ struct device_node;
#ifdef CONFIG_EEH
/* EEH subsystem flags */
-#define EEH_ENABLED 0x1 /* EEH enabled */
-#define EEH_FORCE_DISABLED 0x2 /* EEH disabled */
-#define EEH_PROBE_MODE_DEV 0x4 /* From PCI device */
-#define EEH_PROBE_MODE_DEVTREE 0x8 /* From device tree */
+#define EEH_ENABLED 0x01 /* EEH enabled */
+#define EEH_FORCE_DISABLED 0x02 /* EEH disabled */
+#define EEH_PROBE_MODE_DEV 0x04 /* From PCI device */
+#define EEH_PROBE_MODE_DEVTREE 0x08 /* From device tree */
+#define EEH_ENABLE_IO_FOR_LOG 0x10 /* Enable IO for log */
/*
* Delay for PE reset, all in ms
@@ -84,7 +86,9 @@ struct eeh_pe {
int freeze_count; /* Times of froze up */
struct timeval tstamp; /* Time on first-time freeze */
int false_positives; /* Times of reported #ff's */
+ atomic_t pass_dev_cnt; /* Count of passed through devs */
struct eeh_pe *parent; /* Parent PE */
+ void *data; /* PE auxillary data */
struct list_head child_list; /* Link PE to the child list */
struct list_head edevs; /* Link list of EEH devices */
struct list_head child; /* Child PEs */
@@ -93,6 +97,11 @@ struct eeh_pe {
#define eeh_pe_for_each_dev(pe, edev, tmp) \
list_for_each_entry_safe(edev, tmp, &pe->edevs, list)
+static inline bool eeh_pe_passed(struct eeh_pe *pe)
+{
+ return pe ? !!atomic_read(&pe->pass_dev_cnt) : false;
+}
+
/*
* The struct is used to trace EEH state for the associated
* PCI device node or PCI device. In future, it might
@@ -165,6 +174,11 @@ enum {
#define EEH_STATE_DMA_ACTIVE (1 << 4) /* Active DMA */
#define EEH_STATE_MMIO_ENABLED (1 << 5) /* MMIO enabled */
#define EEH_STATE_DMA_ENABLED (1 << 6) /* DMA enabled */
+#define EEH_PE_STATE_NORMAL 0 /* Normal state */
+#define EEH_PE_STATE_RESET 1 /* PE reset asserted */
+#define EEH_PE_STATE_STOPPED_IO_DMA 2 /* Frozen PE */
+#define EEH_PE_STATE_STOPPED_DMA 4 /* Stopped DMA, Enabled IO */
+#define EEH_PE_STATE_UNAVAIL 5 /* Unavailable */
#define EEH_RESET_DEACTIVATE 0 /* Deactivate the PE reset */
#define EEH_RESET_HOT 1 /* Hot reset */
#define EEH_RESET_FUNDAMENTAL 3 /* Fundamental reset */
@@ -194,36 +208,28 @@ extern int eeh_subsystem_flags;
extern struct eeh_ops *eeh_ops;
extern raw_spinlock_t confirm_error_lock;
-static inline bool eeh_enabled(void)
+static inline void eeh_add_flag(int flag)
{
- if ((eeh_subsystem_flags & EEH_FORCE_DISABLED) ||
- !(eeh_subsystem_flags & EEH_ENABLED))
- return false;
-
- return true;
+ eeh_subsystem_flags |= flag;
}
-static inline void eeh_set_enable(bool mode)
+static inline void eeh_clear_flag(int flag)
{
- if (mode)
- eeh_subsystem_flags |= EEH_ENABLED;
- else
- eeh_subsystem_flags &= ~EEH_ENABLED;
+ eeh_subsystem_flags &= ~flag;
}
-static inline void eeh_probe_mode_set(int flag)
+static inline bool eeh_has_flag(int flag)
{
- eeh_subsystem_flags |= flag;
+ return !!(eeh_subsystem_flags & flag);
}
-static inline int eeh_probe_mode_devtree(void)
+static inline bool eeh_enabled(void)
{
- return (eeh_subsystem_flags & EEH_PROBE_MODE_DEVTREE);
-}
+ if (eeh_has_flag(EEH_FORCE_DISABLED) ||
+ !eeh_has_flag(EEH_ENABLED))
+ return false;
-static inline int eeh_probe_mode_dev(void)
-{
- return (eeh_subsystem_flags & EEH_PROBE_MODE_DEV);
+ return true;
}
static inline void eeh_serialize_lock(unsigned long *flags)
@@ -243,6 +249,7 @@ static inline void eeh_serialize_unlock(unsigned long flags)
#define EEH_MAX_ALLOWED_FREEZES 5
typedef void *(*eeh_traverse_func)(void *data, void *flag);
+void eeh_set_pe_aux_size(int size);
int eeh_phb_pe_create(struct pci_controller *phb);
struct eeh_pe *eeh_phb_pe_get(struct pci_controller *phb);
struct eeh_pe *eeh_pe_get(struct eeh_dev *edev);
@@ -272,6 +279,13 @@ void eeh_add_device_late(struct pci_dev *);
void eeh_add_device_tree_late(struct pci_bus *);
void eeh_add_sysfs_files(struct pci_bus *);
void eeh_remove_device(struct pci_dev *);
+int eeh_dev_open(struct pci_dev *pdev);
+void eeh_dev_release(struct pci_dev *pdev);
+struct eeh_pe *eeh_iommu_group_to_pe(struct iommu_group *group);
+int eeh_pe_set_option(struct eeh_pe *pe, int option);
+int eeh_pe_get_state(struct eeh_pe *pe);
+int eeh_pe_reset(struct eeh_pe *pe, int option);
+int eeh_pe_configure(struct eeh_pe *pe);
/**
* EEH_POSSIBLE_ERROR() -- test for possible MMIO failure.
@@ -295,8 +309,6 @@ static inline bool eeh_enabled(void)
return false;
}
-static inline void eeh_set_enable(bool mode) { }
-
static inline int eeh_init(void)
{
return 0;