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authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-12 10:18:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-12 10:18:02 -0700
commit07820c3bf17822361b25f1015125fd407d9925ed (patch)
tree5fdd7596e5006f0e75ab59b01b846fc017ea666f /arch/microblaze
parentc17b0aadb7d8f87de56a4a374a8131519c0f7422 (diff)
parent70f6283a372bef685fd64564646a3b49a55be1ea (diff)
downloadop-kernel-dev-07820c3bf17822361b25f1015125fd407d9925ed.zip
op-kernel-dev-07820c3bf17822361b25f1015125fd407d9925ed.tar.gz
Merge tag 'microblaze-4.17-rc1' of git://git.monstr.eu/linux-2.6-microblaze
Pull microblaze updates from Michal Simek: "Use generic pci_mmap_resource_range()" * tag 'microblaze-4.17-rc1' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Use generic pci_mmap_resource_range() microblaze: Provide pgprot_device/writecombine macros for nommu
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/include/asm/pci.h7
-rw-r--r--arch/microblaze/include/asm/pgtable.h2
-rw-r--r--arch/microblaze/pci/pci-common.c99
3 files changed, 15 insertions, 93 deletions
diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h
index 114b934..5de871e 100644
--- a/arch/microblaze/include/asm/pci.h
+++ b/arch/microblaze/include/asm/pci.h
@@ -47,9 +47,10 @@ extern int pci_proc_domain(struct pci_bus *bus);
struct vm_area_struct;
-/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
-#define HAVE_PCI_MMAP 1
-#define arch_can_pci_mmap_io() 1
+/* Tell PCI code what kind of PCI resource mappings we support */
+#define HAVE_PCI_MMAP 1
+#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
+#define arch_can_pci_mmap_io() 1
extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
size_t count);
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index e53b853..db8b1fa 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -33,6 +33,8 @@ extern int mem_init_done;
#define PAGE_KERNEL __pgprot(0) /* these mean nothing to non MMU */
#define pgprot_noncached(x) (x)
+#define pgprot_writecombine pgprot_noncached
+#define pgprot_device pgprot_noncached
#define __swp_type(x) (0)
#define __swp_offset(x) (0)
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index ae79e86..161f975 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -151,72 +151,22 @@ void pcibios_set_master(struct pci_dev *dev)
}
/*
- * Platform support for /proc/bus/pci/X/Y mmap()s,
- * modelled on the sparc64 implementation by Dave Miller.
- * -- paulus.
+ * Platform support for /proc/bus/pci/X/Y mmap()s.
*/
-/*
- * Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
- resource_size_t *offset,
- enum pci_mmap_state mmap_state)
+int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma)
{
- struct pci_controller *hose = pci_bus_to_host(dev->bus);
- unsigned long io_offset = 0;
- int i, res_bit;
+ struct pci_controller *hose = pci_bus_to_host(pdev->bus);
+ resource_size_t ioaddr = pci_resource_start(pdev, bar);
if (!hose)
- return NULL; /* should never happen */
-
- /* If memory, add on the PCI bridge address offset */
- if (mmap_state == pci_mmap_mem) {
-#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
- *offset += hose->pci_mem_offset;
-#endif
- res_bit = IORESOURCE_MEM;
- } else {
- io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
- *offset += io_offset;
- res_bit = IORESOURCE_IO;
- }
-
- /*
- * Check that the offset requested corresponds to one of the
- * resources of the device.
- */
- for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
- struct resource *rp = &dev->resource[i];
- int flags = rp->flags;
+ return -EINVAL; /* should never happen */
- /* treat ROM as memory (should be already) */
- if (i == PCI_ROM_RESOURCE)
- flags |= IORESOURCE_MEM;
-
- /* Active and same type? */
- if ((flags & res_bit) == 0)
- continue;
-
- /* In the range of this resource? */
- if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
- continue;
-
- /* found it! construct the final physical address */
- if (mmap_state == pci_mmap_io)
- *offset += hose->io_base_phys - io_offset;
- return rp;
- }
+ /* Convert to an offset within this PCI controller */
+ ioaddr -= (unsigned long)hose->io_base_virt - _IO_BASE;
- return NULL;
+ vma->vm_pgoff += (ioaddr + hose->io_base_phys) >> PAGE_SHIFT;
+ return 0;
}
/*
@@ -268,37 +218,6 @@ pgprot_t pci_phys_mem_access_prot(struct file *file,
return prot;
}
-/*
- * Perform the actual remap of the pages for a PCI device mapping, as
- * appropriate for this architecture. The region in the process to map
- * is described by vm_start and vm_end members of VMA, the base physical
- * address is found in vm_pgoff.
- * The pci device structure is provided so that architectures may make mapping
- * decisions on a per-device or per-bus basis.
- *
- * Returns a negative error code on failure, zero on success.
- */
-int pci_mmap_page_range(struct pci_dev *dev, int bar, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine)
-{
- resource_size_t offset =
- ((resource_size_t)vma->vm_pgoff) << PAGE_SHIFT;
- struct resource *rp;
- int ret;
-
- rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
- if (rp == NULL)
- return -EINVAL;
-
- vma->vm_pgoff = offset >> PAGE_SHIFT;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
-
- return ret;
-}
-
/* This provides legacy IO read access on a bus */
int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, size_t size)
{
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