forked from luck/tmp_suning_uos_patched
of/address: use range parser for of_dma_get_range
of_dma_get_range() does the same ranges parsing as of_pci_range_parser_one(), so let's refactor of_dma_get_range() to use it instead. This commit is no functional change. Subsequent commits will parse more than the 1st dma-ranges entry. Signed-off-by: Rob Herring <robh@kernel.org>
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parent
bc5e522ec4
commit
7a8b64d17e
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@ -939,10 +939,11 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
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{
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struct device_node *node = of_node_get(np);
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const __be32 *ranges = NULL;
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int len, naddr, nsize, pna;
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int len;
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int ret = 0;
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bool found_dma_ranges = false;
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u64 dmaaddr;
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struct of_range_parser parser;
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struct of_range range;
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while (node) {
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ranges = of_get_property(node, "dma-ranges", &len);
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@ -967,33 +968,20 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
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goto out;
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}
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naddr = of_bus_n_addr_cells(node);
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nsize = of_bus_n_size_cells(node);
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pna = of_n_addr_cells(node);
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if ((len / sizeof(__be32)) % (pna + naddr + nsize)) {
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ret = -EINVAL;
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of_dma_range_parser_init(&parser, node);
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for_each_of_range(&parser, &range) {
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pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n",
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range.bus_addr, range.cpu_addr, range.size);
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*dma_addr = range.bus_addr;
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*paddr = range.cpu_addr;
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*size = range.size;
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goto out;
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}
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/* dma-ranges format:
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* DMA addr : naddr cells
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* CPU addr : pna cells
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* size : nsize cells
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*/
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dmaaddr = of_read_number(ranges, naddr);
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*paddr = of_translate_dma_address(node, ranges + naddr);
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if (*paddr == OF_BAD_ADDR) {
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pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n",
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dmaaddr, np);
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ret = -EINVAL;
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goto out;
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}
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*dma_addr = dmaaddr;
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*size = of_read_number(ranges + naddr + pna, nsize);
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pr_debug("dma_addr(%llx) cpu_addr(%llx) size(%llx)\n",
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*dma_addr, *paddr, *size);
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pr_err("translation of DMA ranges failed on node(%pOF)\n", np);
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out:
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of_node_put(node);
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