Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/…

…joro/iommu

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (53 commits)
  iommu/amd: Set IOTLB invalidation timeout
  iommu/amd: Init stats for iommu=pt
  iommu/amd: Remove unnecessary cache flushes in amd_iommu_resume
  iommu/amd: Add invalidate-context call-back
  iommu/amd: Add amd_iommu_device_info() function
  iommu/amd: Adapt IOMMU driver to PCI register name changes
  iommu/amd: Add invalid_ppr callback
  iommu/amd: Implement notifiers for IOMMUv2
  iommu/amd: Implement IO page-fault handler
  iommu/amd: Add routines to bind/unbind a pasid
  iommu/amd: Implement device aquisition code for IOMMUv2
  iommu/amd: Add driver stub for AMD IOMMUv2 support
  iommu/amd: Add stat counter for IOMMUv2 events
  iommu/amd: Add device errata handling
  iommu/amd: Add function to get IOMMUv2 domain for pdev
  iommu/amd: Implement function to send PPR completions
  iommu/amd: Implement functions to manage GCR3 table
  iommu/amd: Implement IOMMUv2 TLB flushing routines
  iommu/amd: Add support for IOMMUv2 domain mode
  iommu/amd: Add amd_iommu_domain_direct_map function
  ...

Documentation/ABI/testing/sysfs-bus-pci

@@ -66,6 +66,24 @@ Description:
 		re-discover previously removed devices.
 		Depends on CONFIG_HOTPLUG.
 
+What:		/sys/bus/pci/devices/.../msi_irqs/
+Date:		September, 2011
+Contact:	Neil Horman <nhorman@tuxdriver.com>
+Description:
+		The /sys/devices/.../msi_irqs directory contains a variable set
+		of sub-directories, with each sub-directory being named after a
+		corresponding msi irq vector allocated to that device.  Each
+		numbered sub-directory N contains attributes of that irq.
+		Note that this directory is not created for device drivers which
+		do not support msi irqs
+
+What:		/sys/bus/pci/devices/.../msi_irqs/<N>/mode
+Date:		September 2011
+Contact:	Neil Horman <nhorman@tuxdriver.com>
+Description:
+		This attribute indicates the mode that the irq vector named by
+		the parent directory is in (msi vs. msix)
+
 What:		/sys/bus/pci/devices/.../remove
 Date:		January 2009
 Contact:	Linux PCI developers <linux-pci@vger.kernel.org>

Documentation/kernel-parameters.txt

@@ -329,6 +329,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 				    is a lot of faster
 			off	  - do not initialize any AMD IOMMU found in
 				    the system
+			force_isolation - Force device isolation for all
+					  devices. The IOMMU driver is not
+					  allowed anymore to lift isolation
+					  requirements as needed. This option
+					  does not override iommu=pt
 
 	amijoy.map=	[HW,JOY] Amiga joystick support
 			Map of devices attached to JOY0DAT and JOY1DAT
@@ -1059,7 +1064,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 		nomerge
 		forcesac
 		soft
-		pt	[x86, IA-64]
+		pt		[x86, IA-64]
+		group_mf	[x86, IA-64]
+
 
 	io7=		[HW] IO7 for Marvel based alpha systems
 			See comment before marvel_specify_io7 in

arch/arm/mach-omap2/devices.c

@@ -28,6 +28,7 @@
 #include <plat/board.h>
 #include <plat/mcbsp.h>
 #include <plat/mmc.h>
+#include <plat/iommu.h>
 #include <plat/dma.h>
 #include <plat/omap_hwmod.h>
 #include <plat/omap_device.h>
@@ -211,9 +212,15 @@ static struct platform_device omap3isp_device = {
 	.resource	= omap3isp_resources,
 };
 
+static struct omap_iommu_arch_data omap3_isp_iommu = {
+	.name = "isp",
+};
+
 int omap3_init_camera(struct isp_platform_data *pdata)
 {
 	omap3isp_device.dev.platform_data = pdata;
+	omap3isp_device.dev.archdata.iommu = &omap3_isp_iommu;
+
 	return platform_device_register(&omap3isp_device);
 }
 

arch/arm/plat-omap/include/plat/iommu.h

@@ -111,6 +111,32 @@ struct iommu_platform_data {
 	u32 da_end;
 };
 
+/**
+ * struct iommu_arch_data - omap iommu private data
+ * @name: name of the iommu device
+ * @iommu_dev: handle of the iommu device
+ *
+ * This is an omap iommu private data object, which binds an iommu user
+ * to its iommu device. This object should be placed at the iommu user's
+ * dev_archdata so generic IOMMU API can be used without having to
+ * utilize omap-specific plumbing anymore.
+ */
+struct omap_iommu_arch_data {
+	const char *name;
+	struct omap_iommu *iommu_dev;
+};
+
+/**
+ * dev_to_omap_iommu() - retrieves an omap iommu object from a user device
+ * @dev: iommu client device
+ */
+static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
+{
+	struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
+
+	return arch_data->iommu_dev;
+}
+
 /* IOMMU errors */
 #define OMAP_IOMMU_ERR_TLB_MISS		(1 << 0)
 #define OMAP_IOMMU_ERR_TRANS_FAULT	(1 << 1)
@@ -163,8 +189,8 @@ extern int omap_iommu_set_isr(const char *name,
 				    void *priv),
 			 void *isr_priv);
 
-extern void omap_iommu_save_ctx(struct omap_iommu *obj);
-extern void omap_iommu_restore_ctx(struct omap_iommu *obj);
+extern void omap_iommu_save_ctx(struct device *dev);
+extern void omap_iommu_restore_ctx(struct device *dev);
 
 extern int omap_install_iommu_arch(const struct iommu_functions *ops);
 extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
@@ -176,6 +202,5 @@ extern ssize_t
 omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
 extern size_t
 omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
-struct device *omap_find_iommu_device(const char *name);
 
 #endif /* __MACH_IOMMU_H */

arch/arm/plat-omap/include/plat/iovmm.h

@@ -72,18 +72,18 @@ struct iovm_struct {
 #define IOVMF_DA_FIXED		(1 << (4 + IOVMF_SW_SHIFT))
 
 
-extern struct iovm_struct *omap_find_iovm_area(struct omap_iommu *obj, u32 da);
+extern struct iovm_struct *omap_find_iovm_area(struct device *dev, u32 da);
 extern u32
-omap_iommu_vmap(struct iommu_domain *domain, struct omap_iommu *obj, u32 da,
+omap_iommu_vmap(struct iommu_domain *domain, struct device *dev, u32 da,
 			const struct sg_table *sgt, u32 flags);
 extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
-				struct omap_iommu *obj, u32 da);
+				struct device *dev, u32 da);
 extern u32
-omap_iommu_vmalloc(struct iommu_domain *domain, struct omap_iommu *obj,
+omap_iommu_vmalloc(struct iommu_domain *domain, struct device *dev,
 				u32 da, size_t bytes, u32 flags);
 extern void
-omap_iommu_vfree(struct iommu_domain *domain, struct omap_iommu *obj,
+omap_iommu_vfree(struct iommu_domain *domain, struct device *dev,
 				const u32 da);
-extern void *omap_da_to_va(struct omap_iommu *obj, u32 da);
+extern void *omap_da_to_va(struct device *dev, u32 da);
 
 #endif /* __IOMMU_MMAP_H */

arch/ia64/include/asm/iommu.h

@@ -11,10 +11,12 @@ extern void no_iommu_init(void);
 extern int force_iommu, no_iommu;
 extern int iommu_pass_through;
 extern int iommu_detected;
+extern int iommu_group_mf;
 #else
 #define iommu_pass_through	(0)
 #define no_iommu		(1)
 #define iommu_detected		(0)
+#define iommu_group_mf		(0)
 #endif
 extern void iommu_dma_init(void);
 extern void machvec_init(const char *name);

arch/ia64/kernel/pci-dma.c

@@ -33,6 +33,7 @@ int force_iommu __read_mostly;
 #endif
 
 int iommu_pass_through;
+int iommu_group_mf;
 
 /* Dummy device used for NULL arguments (normally ISA). Better would
    be probably a smaller DMA mask, but this is bug-to-bug compatible

arch/x86/include/asm/iommu.h

@@ -5,6 +5,7 @@ extern struct dma_map_ops nommu_dma_ops;
 extern int force_iommu, no_iommu;
 extern int iommu_detected;
 extern int iommu_pass_through;
+extern int iommu_group_mf;
 
 /* 10 seconds */
 #define DMAR_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)

arch/x86/kernel/pci-dma.c

@@ -45,6 +45,15 @@ int iommu_detected __read_mostly = 0;
  */
 int iommu_pass_through __read_mostly;
 
+/*
+ * Group multi-function PCI devices into a single device-group for the
+ * iommu_device_group interface.  This tells the iommu driver to pretend
+ * it cannot distinguish between functions of a device, exposing only one
+ * group for the device.  Useful for disallowing use of individual PCI
+ * functions from userspace drivers.
+ */
+int iommu_group_mf __read_mostly;
+
 extern struct iommu_table_entry __iommu_table[], __iommu_table_end[];
 
 /* Dummy device used for NULL arguments (normally ISA). */
@@ -169,6 +178,8 @@ static __init int iommu_setup(char *p)
 #endif
 		if (!strncmp(p, "pt", 2))
 			iommu_pass_through = 1;
+		if (!strncmp(p, "group_mf", 8))
+			iommu_group_mf = 1;
 
 		gart_parse_options(p);
 

drivers/acpi/pci_root.c

@@ -596,6 +596,13 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
 		if (ACPI_SUCCESS(status)) {
 			dev_info(root->bus->bridge,
 				"ACPI _OSC control (0x%02x) granted\n", flags);
+			if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
+				/*
+				 * We have ASPM control, but the FADT indicates
+				 * that it's unsupported. Clear it.
+				 */
+				pcie_clear_aspm(root->bus);
+			}
 		} else {
 			dev_info(root->bus->bridge,
 				"ACPI _OSC request failed (%s), "

drivers/iommu/Kconfig

@@ -34,7 +34,9 @@ config AMD_IOMMU
 	bool "AMD IOMMU support"
 	select SWIOTLB
 	select PCI_MSI
-	select PCI_IOV
+	select PCI_ATS
+	select PCI_PRI
+	select PCI_PASID
 	select IOMMU_API
 	depends on X86_64 && PCI && ACPI
 	---help---
@@ -58,6 +60,15 @@ config AMD_IOMMU_STATS
 	  information to userspace via debugfs.
 	  If unsure, say N.
 
+config AMD_IOMMU_V2
+	tristate "AMD IOMMU Version 2 driver (EXPERIMENTAL)"
+	depends on AMD_IOMMU && PROFILING && EXPERIMENTAL
+	select MMU_NOTIFIER
+	---help---
+	  This option enables support for the AMD IOMMUv2 features of the IOMMU
+	  hardware. Select this option if you want to use devices that support
+	  the the PCI PRI and PASID interface.
+
 # Intel IOMMU support
 config DMAR_TABLE
 	bool

drivers/iommu/Makefile

@@ -1,6 +1,7 @@
 obj-$(CONFIG_IOMMU_API) += iommu.o
 obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
 obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
+obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o
 obj-$(CONFIG_DMAR_TABLE) += dmar.o
 obj-$(CONFIG_INTEL_IOMMU) += iova.o intel-iommu.o
 obj-$(CONFIG_IRQ_REMAP) += intr_remapping.o