diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 08:12:08 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 08:12:08 -0700 |
commit | f84d9fa86820b3074a8c143444a6932c0c0fd019 (patch) | |
tree | 5a255baa763c8d895ab3dc5feee03c288e0f0810 /arch/sparc/kernel | |
parent | 82fa407da081d05323171577d86f62d77df17465 (diff) | |
parent | 98e98eb6a8a179a444a30d903714fab356726155 (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc updates from David Miller:
"Besides some cleanups the major thing here is supporting relaxed
ordering PCIe transactions on newer sparc64 machines, from Chris
Hyser"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: fixing ident and beautifying code
sparc64: Enable setting "relaxed ordering" in IOMMU mappings
sparc64: Enable PCI IOMMU version 2 API
sparc: migrate exception table users off module.h and onto extable.h
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r-- | arch/sparc/kernel/kprobes.c | 2 | ||||
-rw-r--r-- | arch/sparc/kernel/pci_sun4v.c | 52 | ||||
-rw-r--r-- | arch/sparc/kernel/traps_64.c | 2 | ||||
-rw-r--r-- | arch/sparc/kernel/unaligned_64.c | 2 |
4 files changed, 44 insertions, 14 deletions
diff --git a/arch/sparc/kernel/kprobes.c b/arch/sparc/kernel/kprobes.c index cd83be527586..b0377db12d83 100644 --- a/arch/sparc/kernel/kprobes.c +++ b/arch/sparc/kernel/kprobes.c @@ -5,7 +5,7 @@ #include <linux/kernel.h> #include <linux/kprobes.h> -#include <linux/module.h> +#include <linux/extable.h> #include <linux/kdebug.h> #include <linux/slab.h> #include <linux/context_tracking.h> diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 61c6f935accc..db57d8acdc01 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -30,8 +30,19 @@ #define DRIVER_NAME "pci_sun4v" #define PFX DRIVER_NAME ": " -static unsigned long vpci_major = 1; -static unsigned long vpci_minor = 1; +static unsigned long vpci_major; +static unsigned long vpci_minor; + +struct vpci_version { + unsigned long major; + unsigned long minor; +}; + +/* Ordered from largest major to lowest */ +static struct vpci_version vpci_versions[] = { + { .major = 2, .minor = 0 }, + { .major = 1, .minor = 1 }, +}; #define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) @@ -67,6 +78,10 @@ static long iommu_batch_flush(struct iommu_batch *p) u64 *pglist = p->pglist; unsigned long npages = p->npages; + /* VPCI maj=1, min=[0,1] only supports read and write */ + if (vpci_major < 2) + prot &= (HV_PCI_MAP_ATTR_READ | HV_PCI_MAP_ATTR_WRITE); + while (npages != 0) { long num; @@ -133,6 +148,7 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size, unsigned long attrs) { unsigned long flags, order, first_page, npages, n; + unsigned long prot = 0; struct iommu *iommu; struct page *page; void *ret; @@ -146,6 +162,9 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size, npages = size >> IO_PAGE_SHIFT; + if (attrs & DMA_ATTR_WEAK_ORDERING) + prot = HV_PCI_MAP_ATTR_RELAXED_ORDER; + nid = dev->archdata.numa_node; page = alloc_pages_node(nid, gfp, order); if (unlikely(!page)) @@ -169,7 +188,7 @@ static void *dma_4v_alloc_coherent(struct device *dev, size_t size, local_irq_save(flags); iommu_batch_start(dev, - (HV_PCI_MAP_ATTR_READ | + (HV_PCI_MAP_ATTR_READ | prot | HV_PCI_MAP_ATTR_WRITE), entry); @@ -266,6 +285,9 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, if (direction != DMA_TO_DEVICE) prot |= HV_PCI_MAP_ATTR_WRITE; + if (attrs & DMA_ATTR_WEAK_ORDERING) + prot |= HV_PCI_MAP_ATTR_RELAXED_ORDER; + local_irq_save(flags); iommu_batch_start(dev, prot, entry); @@ -344,6 +366,9 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, if (direction != DMA_TO_DEVICE) prot |= HV_PCI_MAP_ATTR_WRITE; + if (attrs & DMA_ATTR_WEAK_ORDERING) + prot |= HV_PCI_MAP_ATTR_RELAXED_ORDER; + outs = s = segstart = &sglist[0]; outcount = 1; incount = nelems; @@ -907,22 +932,27 @@ static int pci_sun4v_probe(struct platform_device *op) struct device_node *dp; struct iommu *iommu; u32 devhandle; - int i, err; + int i, err = -ENODEV; dp = op->dev.of_node; if (!hvapi_negotiated++) { - err = sun4v_hvapi_register(HV_GRP_PCI, - vpci_major, - &vpci_minor); + for (i = 0; i < ARRAY_SIZE(vpci_versions); i++) { + vpci_major = vpci_versions[i].major; + vpci_minor = vpci_versions[i].minor; + + err = sun4v_hvapi_register(HV_GRP_PCI, vpci_major, + &vpci_minor); + if (!err) + break; + } if (err) { - printk(KERN_ERR PFX "Could not register hvapi, " - "err=%d\n", err); + pr_err(PFX "Could not register hvapi, err=%d\n", err); return err; } - printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n", - vpci_major, vpci_minor); + pr_info(PFX "Registered hvapi major[%lu] minor[%lu]\n", + vpci_major, vpci_minor); dma_ops = &sun4v_dma_ops; } diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c index d21cd625c0de..4094a51b1970 100644 --- a/arch/sparc/kernel/traps_64.c +++ b/arch/sparc/kernel/traps_64.c @@ -8,7 +8,7 @@ * I like traps on v9, :)))) */ -#include <linux/module.h> +#include <linux/extable.h> #include <linux/sched.h> #include <linux/linkage.h> #include <linux/kernel.h> diff --git a/arch/sparc/kernel/unaligned_64.c b/arch/sparc/kernel/unaligned_64.c index 9aacb9159262..52c00d90d4b4 100644 --- a/arch/sparc/kernel/unaligned_64.c +++ b/arch/sparc/kernel/unaligned_64.c @@ -11,7 +11,7 @@ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> -#include <linux/module.h> +#include <linux/extable.h> #include <asm/asi.h> #include <asm/ptrace.h> #include <asm/pstate.h> |