The patch titled
Subject: powerpc: add an ioremap_phb helper
has been added to the -mm tree. Its filename is
powerpc-add-an-ioremap_phb-helper.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-add-an-ioremap_phb-helper.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-add-an-ioremap_phb-helper.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: powerpc: add an ioremap_phb helper
Factor code shared between pci_64 and electra_cf into a ioremap_pbh helper
that follows the normal ioremap semantics, and returns a useful __iomem
pointer. Note that it opencodes __ioremap_at as we know from the callers
the slab is available. Switch pci_64 to also store the result as __iomem
pointer, and unmap the result using iounmap instead of force casting and
using vmalloc APIs.
Link: http://lkml.kernel.org/r/20200414131348.444715-7-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Gao Xiang <xiang@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: Laura Abbott <labbott@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Cc: Wei Liu <wei.liu@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/io.h | 2
arch/powerpc/include/asm/pci-bridge.h | 2
arch/powerpc/kernel/pci_64.c | 53 +++++++++++++++---------
drivers/pcmcia/electra_cf.c | 45 +++++++-------------
4 files changed, 54 insertions(+), 48 deletions(-)
--- a/arch/powerpc/include/asm/io.h~powerpc-add-an-ioremap_phb-helper
+++ a/arch/powerpc/include/asm/io.h
@@ -719,6 +719,8 @@ void __iomem *ioremap_coherent(phys_addr
extern void iounmap(volatile void __iomem *addr);
+void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size);
+
int early_ioremap_range(unsigned long ea, phys_addr_t pa,
unsigned long size, pgprot_t prot);
void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size,
--- a/arch/powerpc/include/asm/pci-bridge.h~powerpc-add-an-ioremap_phb-helper
+++ a/arch/powerpc/include/asm/pci-bridge.h
@@ -66,7 +66,7 @@ struct pci_controller {
void __iomem *io_base_virt;
#ifdef CONFIG_PPC64
- void *io_base_alloc;
+ void __iomem *io_base_alloc;
#endif
resource_size_t io_base_phys;
resource_size_t pci_io_size;
--- a/arch/powerpc/kernel/pci_64.c~powerpc-add-an-ioremap_phb-helper
+++ a/arch/powerpc/kernel/pci_64.c
@@ -109,23 +109,46 @@ int pcibios_unmap_io_space(struct pci_bu
/* Get the host bridge */
hose = pci_bus_to_host(bus);
- /* Check if we have IOs allocated */
- if (hose->io_base_alloc == NULL)
- return 0;
-
pr_debug("IO unmapping for PHB %pOF\n", hose->dn);
pr_debug(" alloc=0x%p\n", hose->io_base_alloc);
- /* This is a PHB, we fully unmap the IO area */
- vunmap(hose->io_base_alloc);
-
+ iounmap(hose->io_base_alloc);
return 0;
}
EXPORT_SYMBOL_GPL(pcibios_unmap_io_space);
-static int pcibios_map_phb_io_space(struct pci_controller *hose)
+void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size)
{
struct vm_struct *area;
+ unsigned long addr;
+
+ WARN_ON_ONCE(paddr & ~PAGE_MASK);
+ WARN_ON_ONCE(size & ~PAGE_MASK);
+
+ /*
+ * Let's allocate some IO space for that guy. We don't pass VM_IOREMAP
+ * because we don't care about alignment tricks that the core does in
+ * that case. Maybe we should due to stupid card with incomplete
+ * address decoding but I'd rather not deal with those outside of the
+ * reserved 64K legacy region.
+ */
+ area = __get_vm_area(size, 0, PHB_IO_BASE, PHB_IO_END);
+ if (!area)
+ return NULL;
+
+ addr = (unsigned long)area->addr;
+ if (ioremap_page_range(addr, addr + size, paddr,
+ pgprot_noncached(PAGE_KERNEL))) {
+ unmap_kernel_range(addr, size);
+ return NULL;
+ }
+
+ return (void __iomem *)addr;
+}
+EXPORT_SYMBOL_GPL(ioremap_phb);
+
+static int pcibios_map_phb_io_space(struct pci_controller *hose)
+{
unsigned long phys_page;
unsigned long size_page;
unsigned long io_virt_offset;
@@ -146,12 +169,11 @@ static int pcibios_map_phb_io_space(stru
* with incomplete address decoding but I'd rather not deal with
* those outside of the reserved 64K legacy region.
*/
- area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END);
- if (area == NULL)
+ hose->io_base_alloc = ioremap_phb(phys_page, size_page);
+ if (!hose->io_base_alloc)
return -ENOMEM;
- hose->io_base_alloc = area->addr;
- hose->io_base_virt = (void __iomem *)(area->addr +
- hose->io_base_phys - phys_page);
+ hose->io_base_virt = hose->io_base_alloc +
+ hose->io_base_phys - phys_page;
pr_debug("IO mapping for PHB %pOF\n", hose->dn);
pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n",
@@ -159,11 +181,6 @@ static int pcibios_map_phb_io_space(stru
pr_debug(" size=0x%016llx (alloc=0x%016lx)\n",
hose->pci_io_size, size_page);
- /* Establish the mapping */
- if (__ioremap_at(phys_page, area->addr, size_page,
- pgprot_noncached(PAGE_KERNEL)) == NULL)
- return -ENOMEM;
-
/* Fixup hose IO resource */
io_virt_offset = pcibios_io_space_offset(hose);
hose->io_resource.start += io_virt_offset;
--- a/drivers/pcmcia/electra_cf.c~powerpc-add-an-ioremap_phb-helper
+++ a/drivers/pcmcia/electra_cf.c
@@ -178,10 +178,9 @@ static int electra_cf_probe(struct platf
struct device_node *np = ofdev->dev.of_node;
struct electra_cf_socket *cf;
struct resource mem, io;
- int status;
+ int status = -ENOMEM;
const unsigned int *prop;
int err;
- struct vm_struct *area;
err = of_address_to_resource(np, 0, &mem);
if (err)
@@ -202,30 +201,19 @@ static int electra_cf_probe(struct platf
cf->mem_phys = mem.start;
cf->mem_size = PAGE_ALIGN(resource_size(&mem));
cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
+ if (!cf->mem_base)
+ goto out_free_cf;
cf->io_size = PAGE_ALIGN(resource_size(&io));
-
- area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
- if (area == NULL) {
- status = -ENOMEM;
- goto fail1;
- }
-
- cf->io_virt = (void __iomem *)(area->addr);
+ cf->io_virt = ioremap_phb(io.start, cf->io_size);
+ if (!cf->io_virt)
+ goto out_unmap_mem;
cf->gpio_base = ioremap(0xfc103000, 0x1000);
+ if (!cf->gpio_base)
+ goto out_unmap_virt;
dev_set_drvdata(device, cf);
- if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
- (__ioremap_at(io.start, cf->io_virt, cf->io_size,
- pgprot_noncached(PAGE_KERNEL)) == NULL)) {
- dev_err(device, "can't ioremap ranges\n");
- status = -ENOMEM;
- goto fail1;
- }
-
-
cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
-
cf->iomem.start = (unsigned long)cf->mem_base;
cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
cf->iomem.flags = IORESOURCE_MEM;
@@ -305,14 +293,13 @@ fail1:
if (cf->irq)
free_irq(cf->irq, cf);
- if (cf->io_virt)
- __iounmap_at(cf->io_virt, cf->io_size);
- if (cf->mem_base)
- iounmap(cf->mem_base);
- if (cf->gpio_base)
- iounmap(cf->gpio_base);
- if (area)
- device_init_wakeup(&ofdev->dev, 0);
+ iounmap(cf->gpio_base);
+out_unmap_virt:
+ device_init_wakeup(&ofdev->dev, 0);
+ iounmap(cf->io_virt);
+out_unmap_mem:
+ iounmap(cf->mem_base);
+out_free_cf:
kfree(cf);
return status;
@@ -330,7 +317,7 @@ static int electra_cf_remove(struct plat
free_irq(cf->irq, cf);
del_timer_sync(&cf->timer);
- __iounmap_at(cf->io_virt, cf->io_size);
+ iounmap(cf->io_virt);
iounmap(cf->mem_base);
iounmap(cf->gpio_base);
release_mem_region(cf->mem_phys, cf->mem_size);
_
Patches currently in -mm which might be from hch@xxxxxx are
x86-hyperv-use-vmalloc_exec-for-the-hypercall-page.patch
x86-fix-vmap-arguments-in-map_irq_stack.patch
staging-android-ion-use-vmap-instead-of-vm_map_ram.patch
staging-media-ipu3-use-vmap-instead-of-reimplementing-it.patch
dma-mapping-use-vmap-insted-of-reimplementing-it.patch
powerpc-add-an-ioremap_phb-helper.patch
powerpc-remove-__ioremap_at-and-__iounmap_at.patch
mm-remove-__get_vm_area.patch
mm-unexport-unmap_kernel_range_noflush.patch
mm-rename-config_pgtable_mapping-to-config_zsmalloc_pgtable_mapping.patch
mm-only-allow-page-table-mappings-for-built-in-zsmalloc.patch
mm-pass-addr-as-unsigned-long-to-vb_free.patch
mm-remove-vmap_page_range_noflush-and-vunmap_page_range.patch
mm-rename-vmap_page_range-to-map_kernel_range.patch
mm-dont-return-the-number-of-pages-from-map_kernel_range_noflush.patch
mm-remove-map_vm_range.patch
mm-remove-unmap_vmap_area.patch
mm-remove-the-prot-argument-from-vm_map_ram.patch
mm-enforce-that-vmap-cant-map-pages-executable.patch
gpu-drm-remove-the-powerpc-hack-in-drm_legacy_sg_alloc.patch
mm-remove-the-pgprot-argument-to-__vmalloc.patch
mm-remove-the-prot-argument-to-__vmalloc_node.patch
mm-remove-both-instances-of-__vmalloc_node_flags.patch
mm-remove-__vmalloc_node_flags_caller.patch
mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node.patch
mm-remove-vmalloc_user_node_flags.patch
arm64-use-__vmalloc_node-in-arch_alloc_vmap_stack.patch
powerpc-use-__vmalloc_node-in-alloc_vm_stack.patch
s390-use-__vmalloc_node-in-stack_alloc.patch
