Hi Jisheng, I love your patch! Yet something to improve: [auto build test ERROR on ulf.hansson-mmc/next] [also build test ERROR on next-20180727] [cannot apply to v4.18-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Jisheng-Zhang/solve-SDHCI-DWC-MSHC-128MB-DMA-boundary-limitation/20180728-234650 base: git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next config: x86_64-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-16) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All error/warnings (new ones prefixed by >>): drivers/mmc/host/sdhci-of-dwcmshc.c: In function 'dwcmshc_adma_write_desc': >> drivers/mmc/host/sdhci-of-dwcmshc.c:18:12: error: 'SZ_128M' undeclared (first use in this function) ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) ^ >> drivers/mmc/host/sdhci-of-dwcmshc.c:34:6: note: in expansion of macro 'BOUNDARY_OK' if (BOUNDARY_OK(addr, len) || !len) ^~~~~~~~~~~ drivers/mmc/host/sdhci-of-dwcmshc.c:18:12: note: each undeclared identifier is reported only once for each function it appears in ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) ^ >> drivers/mmc/host/sdhci-of-dwcmshc.c:34:6: note: in expansion of macro 'BOUNDARY_OK' if (BOUNDARY_OK(addr, len) || !len) ^~~~~~~~~~~ In file included from include/linux/cache.h:5:0, from include/linux/printk.h:9, from include/linux/kernel.h:14, from include/linux/clk.h:16, from drivers/mmc/host/sdhci-of-dwcmshc.c:10: drivers/mmc/host/sdhci-of-dwcmshc.c: In function 'dwcmshc_probe': drivers/mmc/host/sdhci-of-dwcmshc.c:82:39: error: 'SZ_128M' undeclared (first use in this function) extra = DIV_ROUND_UP(totalram_pages, SZ_128M / PAGE_SIZE); ^ include/uapi/linux/kernel.h:13:46: note: in definition of macro '__KERNEL_DIV_ROUND_UP' #define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) ^ >> drivers/mmc/host/sdhci-of-dwcmshc.c:82:10: note: in expansion of macro 'DIV_ROUND_UP' extra = DIV_ROUND_UP(totalram_pages, SZ_128M / PAGE_SIZE); ^~~~~~~~~~~~ vim +/SZ_128M +18 drivers/mmc/host/sdhci-of-dwcmshc.c > 10 #include <linux/clk.h> 11 #include <linux/mm.h> 12 #include <linux/module.h> 13 #include <linux/of.h> 14 15 #include "sdhci-pltfm.h" 16 17 #define BOUNDARY_OK(addr, len) \ > 18 ((addr | (SZ_128M - 1)) == ((addr + len - 1) | (SZ_128M - 1))) 19 20 struct dwcmshc_priv { 21 struct clk *bus_clk; 22 }; 23 24 /* 25 * if DMA addr spans 128MB boundary, we split the DMA transfer into two 26 * so that the DMA transfer doesn't exceed the boundary. 27 */ 28 static unsigned int dwcmshc_adma_write_desc(struct sdhci_host *host, 29 void *desc, dma_addr_t addr, 30 int len, unsigned int cmd) 31 { 32 int tmplen, offset; 33 > 34 if (BOUNDARY_OK(addr, len) || !len) 35 return _sdhci_adma_write_desc(host, desc, addr, len, cmd); 36 37 offset = addr & (SZ_128M - 1); 38 tmplen = SZ_128M - offset; 39 _sdhci_adma_write_desc(host, desc, addr, tmplen, cmd); 40 41 addr += tmplen; 42 len -= tmplen; 43 desc += host->desc_sz; 44 _sdhci_adma_write_desc(host, desc, addr, len, cmd); 45 46 return host->desc_sz * 2; 47 } 48 49 static const struct sdhci_ops sdhci_dwcmshc_ops = { 50 .set_clock = sdhci_set_clock, 51 .set_bus_width = sdhci_set_bus_width, 52 .set_uhs_signaling = sdhci_set_uhs_signaling, 53 .get_max_clock = sdhci_pltfm_clk_get_max_clock, 54 .reset = sdhci_reset, 55 .adma_write_desc = dwcmshc_adma_write_desc, 56 }; 57 58 static const struct sdhci_pltfm_data sdhci_dwcmshc_pdata = { 59 .ops = &sdhci_dwcmshc_ops, 60 .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, 61 }; 62 63 static int dwcmshc_probe(struct platform_device *pdev) 64 { 65 struct sdhci_pltfm_host *pltfm_host; 66 struct sdhci_host *host; 67 struct dwcmshc_priv *priv; 68 int err; 69 u32 extra; 70 71 host = sdhci_pltfm_init(pdev, &sdhci_dwcmshc_pdata, 72 sizeof(struct dwcmshc_priv)); 73 if (IS_ERR(host)) 74 return PTR_ERR(host); 75 76 /* 77 * The DMA descriptor table number is calculated as the maximum 78 * number of segments times 2, to allow for an alignment 79 * descriptor for each segment, plus 1 for a nop end descriptor, 80 * plus extra number for cross 128M boundary handling. 81 */ > 82 extra = DIV_ROUND_UP(totalram_pages, SZ_128M / PAGE_SIZE); 83 if (extra > SDHCI_MAX_SEGS) 84 extra = SDHCI_MAX_SEGS; 85 host->adma_table_num = SDHCI_MAX_SEGS * 2 + 1 + extra; 86 87 pltfm_host = sdhci_priv(host); 88 priv = sdhci_pltfm_priv(pltfm_host); 89 90 pltfm_host->clk = devm_clk_get(&pdev->dev, "core"); 91 if (IS_ERR(pltfm_host->clk)) { 92 err = PTR_ERR(pltfm_host->clk); 93 dev_err(&pdev->dev, "failed to get core clk: %d\n", err); 94 goto free_pltfm; 95 } 96 err = clk_prepare_enable(pltfm_host->clk); 97 if (err) 98 goto free_pltfm; 99 100 priv->bus_clk = devm_clk_get(&pdev->dev, "bus"); 101 if (!IS_ERR(priv->bus_clk)) 102 clk_prepare_enable(priv->bus_clk); 103 104 err = mmc_of_parse(host->mmc); 105 if (err) 106 goto err_clk; 107 108 sdhci_get_of_property(pdev); 109 110 err = sdhci_add_host(host); 111 if (err) 112 goto err_clk; 113 114 return 0; 115 116 err_clk: 117 clk_disable_unprepare(pltfm_host->clk); 118 clk_disable_unprepare(priv->bus_clk); 119 free_pltfm: 120 sdhci_pltfm_free(pdev); 121 return err; 122 } 123 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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