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authorRob Herring <robh@kernel.org>2021-05-27 14:37:09 -0500
committerJoerg Roedel <jroedel@suse.de>2021-06-08 14:15:46 +0200
commitbb6bfd79d9bc69f0808a4156ec3ca9fb78694039 (patch)
tree0b2529f9d235c728564740801cddffc9139aff77 /drivers/iommu
parent7978724f399ae7eba5b6d36ae5a7224d5bf3859a (diff)
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iommu: Remove unused of_get_dma_window()
of_get_dma_window() was added in 2012 and removed in 2014 in commit 891846516317 ("memory: Add NVIDIA Tegra memory controller support"). Remove it and simplify the header to use forward declarations for structs rather than includes. Cc: Joerg Roedel <joro@8bytes.org> Cc: Will Deacon <will@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: iommu@lists.linux-foundation.org Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20210527193710.1281746-1-robh@kernel.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/of_iommu.c68
1 files changed, 0 insertions, 68 deletions
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index a9d2df001149..5696314ae69e 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -19,74 +19,6 @@
#define NO_IOMMU 1
-/**
- * of_get_dma_window - Parse *dma-window property and returns 0 if found.
- *
- * @dn: device node
- * @prefix: prefix for property name if any
- * @index: index to start to parse
- * @busno: Returns busno if supported. Otherwise pass NULL
- * @addr: Returns address that DMA starts
- * @size: Returns the range that DMA can handle
- *
- * This supports different formats flexibly. "prefix" can be
- * configured if any. "busno" and "index" are optionally
- * specified. Set 0(or NULL) if not used.
- */
-int of_get_dma_window(struct device_node *dn, const char *prefix, int index,
- unsigned long *busno, dma_addr_t *addr, size_t *size)
-{
- const __be32 *dma_window, *end;
- int bytes, cur_index = 0;
- char propname[NAME_MAX], addrname[NAME_MAX], sizename[NAME_MAX];
-
- if (!dn || !addr || !size)
- return -EINVAL;
-
- if (!prefix)
- prefix = "";
-
- snprintf(propname, sizeof(propname), "%sdma-window", prefix);
- snprintf(addrname, sizeof(addrname), "%s#dma-address-cells", prefix);
- snprintf(sizename, sizeof(sizename), "%s#dma-size-cells", prefix);
-
- dma_window = of_get_property(dn, propname, &bytes);
- if (!dma_window)
- return -ENODEV;
- end = dma_window + bytes / sizeof(*dma_window);
-
- while (dma_window < end) {
- u32 cells;
- const void *prop;
-
- /* busno is one cell if supported */
- if (busno)
- *busno = be32_to_cpup(dma_window++);
-
- prop = of_get_property(dn, addrname, NULL);
- if (!prop)
- prop = of_get_property(dn, "#address-cells", NULL);
-
- cells = prop ? be32_to_cpup(prop) : of_n_addr_cells(dn);
- if (!cells)
- return -EINVAL;
- *addr = of_read_number(dma_window, cells);
- dma_window += cells;
-
- prop = of_get_property(dn, sizename, NULL);
- cells = prop ? be32_to_cpup(prop) : of_n_size_cells(dn);
- if (!cells)
- return -EINVAL;
- *size = of_read_number(dma_window, cells);
- dma_window += cells;
-
- if (cur_index++ == index)
- break;
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(of_get_dma_window);
-
static int of_iommu_xlate(struct device *dev,
struct of_phandle_args *iommu_spec)
{