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io-mapping: Specify mapping size for io_mapping_map_wc()

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The ioremap() hidden behind the io_mapping_map_wc() convenience helper
can be used for remapping multiple pages. Extend the helper so that
future callers can use it for larger ranges.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Yishai Hadas <yishaih@mellanox.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: Luis R. Rodriguez <mcgrof@kernel.org>
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: netdev@vger.kernel.org
Cc: linux-rdma@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Luis R. Rodriguez <mcgrof@kernel.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-3-git-send-email-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-04-28 09:56:37 +01:00
parent da6ca0347d
commit d8dab00de9
3 changed files with 12 additions and 5 deletions
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10
include/linux/io-mapping.h
View file

@ -100,14 +100,16 @@ io_mapping_unmap_atomic(void __iomem *vaddr)
}
static inline void __iomem *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
io_mapping_map_wc(struct io_mapping *mapping,
unsigned long offset,
unsigned long size)
{
resource_size_t phys_addr;
BUG_ON(offset >= mapping->size);
phys_addr = mapping->base + offset;
return ioremap_wc(phys_addr, PAGE_SIZE);
return ioremap_wc(phys_addr, size);
}
static inline void
@ -155,7 +157,9 @@ io_mapping_unmap_atomic(void __iomem *vaddr)
/* Non-atomic map/unmap */
static inline void __iomem *
io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
io_mapping_map_wc(struct io_mapping *mapping,
unsigned long offset,
unsigned long size)
{
return ((char __force __iomem *) mapping) + offset;
}