| Message ID | 20200910041101.1695195-3-ikjn@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add 36bit dma support to mediatek spi-nor controller. | expand |
Hi Ikjoon,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on spi/for-next]
[also build test WARNING on next-20200910]
[cannot apply to robh/for-next v5.9-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Ikjoon-Jang/Add-36bit-dma-support-to-mediatek-spi-nor-controller/20200910-121600
base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arm-randconfig-r035-20200909 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/spi/spi-mtk-nor.c:286:19: warning: shift count >= width of type [-Wshift-count-overflow]
writel(dma_addr >> 32, sp->base + MTK_NOR_REG_DMA_DADR_HB);
^ ~~
arch/arm/include/asm/io.h:307:51: note: expanded from macro 'writel'
#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
^
arch/arm/include/asm/io.h:299:68: note: expanded from macro 'writel_relaxed'
#define writel_relaxed(v,c) __raw_writel((__force u32) cpu_to_le32(v),c)
^
include/uapi/linux/byteorder/little_endian.h:33:51: note: expanded from macro '__cpu_to_le32'
#define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
^
drivers/spi/spi-mtk-nor.c:287:30: warning: shift count >= width of type [-Wshift-count-overflow]
writel((dma_addr + length) >> 32, sp->base + MTK_NOR_REG_DMA_END_DADR_HB);
^ ~~
arch/arm/include/asm/io.h:307:51: note: expanded from macro 'writel'
#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
^
arch/arm/include/asm/io.h:299:68: note: expanded from macro 'writel_relaxed'
#define writel_relaxed(v,c) __raw_writel((__force u32) cpu_to_le32(v),c)
^
include/uapi/linux/byteorder/little_endian.h:33:51: note: expanded from macro '__cpu_to_le32'
#define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
^
2 warnings generated.
# https://github.com/0day-ci/linux/commit/d6ccdab2988e8bf7aa66cc57daeac5e1a7e399cc
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Ikjoon-Jang/Add-36bit-dma-support-to-mediatek-spi-nor-controller/20200910-121600
git checkout d6ccdab2988e8bf7aa66cc57daeac5e1a7e399cc
vim +286 drivers/spi/spi-mtk-nor.c
266
267 static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length,
268 u8 *buffer)
269 {
270 int ret = 0;
271 ulong delay;
272 u32 reg;
273 dma_addr_t dma_addr;
274
275 dma_addr = dma_map_single(sp->dev, buffer, length, DMA_FROM_DEVICE);
276 if (dma_mapping_error(sp->dev, dma_addr)) {
277 dev_err(sp->dev, "failed to map dma buffer.\n");
278 return -EINVAL;
279 }
280
281 writel(from, sp->base + MTK_NOR_REG_DMA_FADR);
282 writel(dma_addr, sp->base + MTK_NOR_REG_DMA_DADR);
283 writel(dma_addr + length, sp->base + MTK_NOR_REG_DMA_END_DADR);
284
285 if (sp->high_dma) {
> 286 writel(dma_addr >> 32, sp->base + MTK_NOR_REG_DMA_DADR_HB);
287 writel((dma_addr + length) >> 32, sp->base + MTK_NOR_REG_DMA_END_DADR_HB);
288 }
289
290 if (sp->has_irq) {
291 reinit_completion(&sp->op_done);
292 mtk_nor_rmw(sp, MTK_NOR_REG_IRQ_EN, MTK_NOR_IRQ_DMA, 0);
293 }
294
295 mtk_nor_rmw(sp, MTK_NOR_REG_DMA_CTL, MTK_NOR_DMA_START, 0);
296
297 delay = CLK_TO_US(sp, (length + 5) * BITS_PER_BYTE);
298
299 if (sp->has_irq) {
300 if (!wait_for_completion_timeout(&sp->op_done,
301 (delay + 1) * 100))
302 ret = -ETIMEDOUT;
303 } else {
304 ret = readl_poll_timeout(sp->base + MTK_NOR_REG_DMA_CTL, reg,
305 !(reg & MTK_NOR_DMA_START), delay / 3,
306 (delay + 1) * 100);
307 }
308
309 dma_unmap_single(sp->dev, dma_addr, length, DMA_FROM_DEVICE);
310 if (ret < 0)
311 dev_err(sp->dev, "dma read timeout.\n");
312
313 return ret;
314 }
315
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index 6e6ca2b8e6c8..eb93ae34e670 100644 --- a/drivers/spi/spi-mtk-nor.c +++ b/drivers/spi/spi-mtk-nor.c @@ -78,6 +78,8 @@ #define MTK_NOR_REG_DMA_FADR 0x71c #define MTK_NOR_REG_DMA_DADR 0x720 #define MTK_NOR_REG_DMA_END_DADR 0x724 +#define MTK_NOR_REG_DMA_DADR_HB 0x738 +#define MTK_NOR_REG_DMA_END_DADR_HB 0x73c #define MTK_NOR_PRG_MAX_SIZE 6 // Reading DMA src/dst addresses have to be 16-byte aligned @@ -101,6 +103,7 @@ struct mtk_nor { unsigned int spi_freq; bool wbuf_en; bool has_irq; + bool high_dma; struct completion op_done; }; @@ -279,6 +282,11 @@ static int mtk_nor_read_dma(struct mtk_nor *sp, u32 from, unsigned int length, writel(dma_addr, sp->base + MTK_NOR_REG_DMA_DADR); writel(dma_addr + length, sp->base + MTK_NOR_REG_DMA_END_DADR); + if (sp->high_dma) { + writel(dma_addr >> 32, sp->base + MTK_NOR_REG_DMA_DADR_HB); + writel((dma_addr + length) >> 32, sp->base + MTK_NOR_REG_DMA_END_DADR_HB); + } + if (sp->has_irq) { reinit_completion(&sp->op_done); mtk_nor_rmw(sp, MTK_NOR_REG_IRQ_EN, MTK_NOR_IRQ_DMA, 0); @@ -578,7 +586,8 @@ static const struct spi_controller_mem_ops mtk_nor_mem_ops = { }; static const struct of_device_id mtk_nor_match[] = { - { .compatible = "mediatek,mt8173-nor" }, + { .compatible = "mediatek,mt8192-nor", .data = (void *)36 }, + { .compatible = "mediatek,mt8173-nor", .data = (void *)32 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, mtk_nor_match); @@ -591,6 +600,7 @@ static int mtk_nor_probe(struct platform_device *pdev) u8 *buffer; struct clk *spi_clk, *ctlr_clk; int ret, irq; + unsigned long dma_bits; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) @@ -614,6 +624,12 @@ static int mtk_nor_probe(struct platform_device *pdev) buffer = (u8 *)(((ulong)buffer + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK); + dma_bits = (unsigned long)of_device_get_match_data(&pdev->dev); + if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(dma_bits))) { + dev_err(&pdev->dev, "failed to set dma mask(%lu)\n", dma_bits); + return -EINVAL; + } + ctlr = spi_alloc_master(&pdev->dev, sizeof(*sp)); if (!ctlr) { dev_err(&pdev->dev, "failed to allocate spi controller\n"); @@ -640,6 +656,7 @@ static int mtk_nor_probe(struct platform_device *pdev) sp->dev = &pdev->dev; sp->spi_clk = spi_clk; sp->ctlr_clk = ctlr_clk; + sp->high_dma = (dma_bits > 32); irq = platform_get_irq_optional(pdev, 0); if (irq < 0) {
This patch enables direct mappings over 32bit range to spi-mtk-nor. Signed-off-by: Ikjoon Jang <ikjn@chromium.org> --- drivers/spi/spi-mtk-nor.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)