From bb6bfd79d9bc69f0808a4156ec3ca9fb78694039 Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Thu, 27 May 2021 14:37:09 -0500 Subject: 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 Cc: Will Deacon Cc: Frank Rowand Cc: iommu@lists.linux-foundation.org Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20210527193710.1281746-1-robh@kernel.org Signed-off-by: Joerg Roedel --- drivers/iommu/of_iommu.c | 68 ------------------------------------------------ 1 file changed, 68 deletions(-) (limited to 'drivers/iommu/of_iommu.c') 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) { -- cgit