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 --- drivers/gpu/drm/i915/intel_overlay.c | 3 ++- drivers/net/ethernet/mellanox/mlx4/pd.c | 4 +++- include/linux/io-mapping.h | 10 +++++++--- 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c index 9746b9841c13..0d5a376878d3 100644 --- a/drivers/gpu/drm/i915/intel_overlay.c +++ b/drivers/gpu/drm/i915/intel_overlay.c @@ -198,7 +198,8 @@ intel_overlay_map_regs(struct intel_overlay *overlay) regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_handle->vaddr; else regs = io_mapping_map_wc(ggtt->mappable, - overlay->flip_addr); + overlay->flip_addr, + PAGE_SIZE);

return regs; } diff --git a/drivers/net/ethernet/mellanox/mlx4/pd.c b/drivers/net/ethernet/mellanox/mlx4/pd.c index b3cc3ab63799..6fc156a3918d 100644 --- a/drivers/net/ethernet/mellanox/mlx4/pd.c +++ b/drivers/net/ethernet/mellanox/mlx4/pd.c @@ -205,7 +205,9 @@ int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node) goto free_uar; }

- uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); + uar->bf_map = io_mapping_map_wc(priv->bf_mapping, + uar->index << PAGE_SHIFT, + PAGE_SIZE); if (!uar->bf_map) { err = -ENOMEM; goto unamp_uar; diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h index e399029b68c5..645ad06b5d52 100644 --- a/include/linux/io-mapping.h +++ b/include/linux/io-mapping.h @@ -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; }