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Message-ID: <202412030631.BhmsnlFP-lkp@intel.com>
Date: Tue, 3 Dec 2024 06:59:31 +0800
From: kernel test robot <lkp@...el.com>
To: Roger Quadros <rogerq@...nel.org>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>
Subject: drivers/mtd/nand/raw/omap2.c:260: warning: Function parameter or
member 'chip' not described in 'omap_nand_data_in_pref'
Hi Roger,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: cdd30ebb1b9f36159d66f088b61aee264e649d7a
commit: 854fd9209b20837ab48c2e6714e5e44dd8ea33a2 memory: omap-gpmc: Allow building as a module
date: 2 years, 7 months ago
config: x86_64-buildonly-randconfig-002-20240107 (https://download.01.org/0day-ci/archive/20241203/202412030631.BhmsnlFP-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241203/202412030631.BhmsnlFP-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412030631.BhmsnlFP-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/mtd/nand/raw/omap2.c:260: warning: Function parameter or member 'chip' not described in 'omap_nand_data_in_pref'
>> drivers/mtd/nand/raw/omap2.c:260: warning: Function parameter or member 'buf' not described in 'omap_nand_data_in_pref'
>> drivers/mtd/nand/raw/omap2.c:260: warning: Function parameter or member 'len' not described in 'omap_nand_data_in_pref'
>> drivers/mtd/nand/raw/omap2.c:260: warning: Function parameter or member 'force_8bit' not described in 'omap_nand_data_in_pref'
>> drivers/mtd/nand/raw/omap2.c:304: warning: Function parameter or member 'chip' not described in 'omap_nand_data_out_pref'
>> drivers/mtd/nand/raw/omap2.c:304: warning: Function parameter or member 'buf' not described in 'omap_nand_data_out_pref'
>> drivers/mtd/nand/raw/omap2.c:304: warning: Function parameter or member 'len' not described in 'omap_nand_data_out_pref'
>> drivers/mtd/nand/raw/omap2.c:304: warning: Function parameter or member 'force_8bit' not described in 'omap_nand_data_out_pref'
>> drivers/mtd/nand/raw/omap2.c:446: warning: Function parameter or member 'chip' not described in 'omap_nand_data_in_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:446: warning: Function parameter or member 'buf' not described in 'omap_nand_data_in_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:446: warning: Function parameter or member 'len' not described in 'omap_nand_data_in_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:446: warning: Function parameter or member 'force_8bit' not described in 'omap_nand_data_in_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:467: warning: Function parameter or member 'chip' not described in 'omap_nand_data_out_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:467: warning: Function parameter or member 'buf' not described in 'omap_nand_data_out_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:467: warning: Function parameter or member 'len' not described in 'omap_nand_data_out_dma_pref'
>> drivers/mtd/nand/raw/omap2.c:467: warning: Function parameter or member 'force_8bit' not described in 'omap_nand_data_out_dma_pref'
vim +260 drivers/mtd/nand/raw/omap2.c
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 254
67ce04bf2746f8 drivers/mtd/nand/omap2.c Vimal Singh 2009-05-12 255 /**
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 256 * omap_nand_data_in_pref - NAND data in using prefetch engine
67ce04bf2746f8 drivers/mtd/nand/omap2.c Vimal Singh 2009-05-12 257 */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 258 static void omap_nand_data_in_pref(struct nand_chip *chip, void *buf,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 259 unsigned int len, bool force_8bit)
67ce04bf2746f8 drivers/mtd/nand/omap2.c Vimal Singh 2009-05-12 @260 {
0f808c1602bc75 drivers/mtd/nand/raw/omap2.c Boris Brezillon 2018-09-06 261 struct omap_nand_info *info = mtd_to_omap(nand_to_mtd(chip));
2c01946c6b9eba drivers/mtd/nand/omap2.c Sukumar Ghorai 2010-07-09 262 uint32_t r_count = 0;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 263 int ret = 0;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 264 u32 *p = (u32 *)buf;
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 265 unsigned int pref_len;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 266
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 267 if (force_8bit) {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 268 omap_nand_data_in(chip, buf, len, force_8bit);
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 269 return;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 270 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 271
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 272 /* read 32-bit words using prefetch and remaining bytes normally */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 273
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 274 /* configure and start prefetch transfer */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 275 pref_len = len - (len & 3);
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 276 ret = omap_prefetch_enable(info->gpmc_cs,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 277 PREFETCH_FIFOTHRESHOLD_MAX, 0x0, pref_len, 0x0, info);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 278 if (ret) {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 279 /* prefetch engine is busy, use CPU copy method */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 280 omap_nand_data_in(chip, buf, len, false);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 281 } else {
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 282 do {
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 283 r_count = readl(info->reg.gpmc_prefetch_status);
47f88af4ed80ac drivers/mtd/nand/omap2.c Afzal Mohammed 2012-09-29 284 r_count = PREFETCH_STATUS_FIFO_CNT(r_count);
2c01946c6b9eba drivers/mtd/nand/omap2.c Sukumar Ghorai 2010-07-09 285 r_count = r_count >> 2;
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 286 ioread32_rep(info->fifo, p, r_count);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 287 p += r_count;
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 288 pref_len -= r_count << 2;
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 289 } while (pref_len);
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 290 /* disable and stop the Prefetch engine */
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 291 omap_prefetch_reset(info->gpmc_cs, info);
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 292 /* fetch any remaining bytes */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 293 if (len & 3)
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 294 omap_nand_data_in(chip, p, len & 3, false);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 295 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 296 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 297
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 298 /**
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 299 * omap_nand_data_out_pref - NAND data out using Write Posting engine
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 300 */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 301 static void omap_nand_data_out_pref(struct nand_chip *chip,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 302 const void *buf, unsigned int len,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 303 bool force_8bit)
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 @304 {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 305 struct omap_nand_info *info = mtd_to_omap(nand_to_mtd(chip));
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 306 uint32_t w_count = 0;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 307 int i = 0, ret = 0;
c5d8c0cae4af7d drivers/mtd/nand/omap2.c Kishore Kadiyala 2011-05-11 308 u16 *p = (u16 *)buf;
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 309 unsigned long tim, limit;
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 310 u32 val;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 311
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 312 if (force_8bit) {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 313 omap_nand_data_out(chip, buf, len, force_8bit);
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 314 return;
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 315 }
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 316
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 317 /* take care of subpage writes */
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 318 if (len % 2 != 0) {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 319 writeb(*(u8 *)buf, info->fifo);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 320 p = (u16 *)(buf + 1);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 321 len--;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 322 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 323
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 324 /* configure and start prefetch transfer */
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 325 ret = omap_prefetch_enable(info->gpmc_cs,
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 326 PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x1, info);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 327 if (ret) {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 328 /* write posting engine is busy, use CPU copy method */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 329 omap_nand_data_out(chip, buf, len, false);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 330 } else {
2c01946c6b9eba drivers/mtd/nand/omap2.c Sukumar Ghorai 2010-07-09 331 while (len) {
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 332 w_count = readl(info->reg.gpmc_prefetch_status);
47f88af4ed80ac drivers/mtd/nand/omap2.c Afzal Mohammed 2012-09-29 333 w_count = PREFETCH_STATUS_FIFO_CNT(w_count);
2c01946c6b9eba drivers/mtd/nand/omap2.c Sukumar Ghorai 2010-07-09 334 w_count = w_count >> 1;
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 335 for (i = 0; (i < w_count) && len; i++, len -= 2)
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 336 iowrite16(*p++, info->fifo);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 337 }
2c01946c6b9eba drivers/mtd/nand/omap2.c Sukumar Ghorai 2010-07-09 338 /* wait for data to flushed-out before reset the prefetch */
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 339 tim = 0;
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 340 limit = (loops_per_jiffy *
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 341 msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS));
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 342 do {
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 343 cpu_relax();
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 344 val = readl(info->reg.gpmc_prefetch_status);
47f88af4ed80ac drivers/mtd/nand/omap2.c Afzal Mohammed 2012-09-29 345 val = PREFETCH_STATUS_COUNT(val);
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 346 } while (val && (tim++ < limit));
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 347
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 348 /* disable and stop the PFPW engine */
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 349 omap_prefetch_reset(info->gpmc_cs, info);
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 350 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 351 }
59e9c5ae17179f drivers/mtd/nand/omap2.c vimal singh 2009-07-13 352
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 353 /*
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 354 * omap_nand_dma_callback: callback on the completion of dma transfer
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 355 * @data: pointer to completion data structure
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 356 */
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 357 static void omap_nand_dma_callback(void *data)
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 358 {
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 359 complete((struct completion *) data);
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 360 }
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 361
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 362 /*
4cacbe226f3906 drivers/mtd/nand/omap2.c Peter Meerwald 2012-07-19 363 * omap_nand_dma_transfer: configure and start dma transfer
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 364 * @chip: nand chip structure
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 365 * @addr: virtual address in RAM of source/destination
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 366 * @len: number of data bytes to be transferred
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 367 * @is_write: flag for read/write operation
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 368 */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 369 static inline int omap_nand_dma_transfer(struct nand_chip *chip,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 370 const void *addr, unsigned int len,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 371 int is_write)
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 372 {
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 373 struct omap_nand_info *info = mtd_to_omap(nand_to_mtd(chip));
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 374 struct dma_async_tx_descriptor *tx;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 375 enum dma_data_direction dir = is_write ? DMA_TO_DEVICE :
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 376 DMA_FROM_DEVICE;
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 377 struct scatterlist sg;
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 378 unsigned long tim, limit;
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 379 unsigned n;
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 380 int ret;
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 381 u32 val;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 382
8c6f0fc4d2d505 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 383 if (!virt_addr_valid(addr))
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 384 goto out_copy;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 385
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 386 sg_init_one(&sg, addr, len);
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 387 n = dma_map_sg(info->dma->device->dev, &sg, 1, dir);
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 388 if (n == 0) {
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 389 dev_err(&info->pdev->dev,
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 390 "Couldn't DMA map a %d byte buffer\n", len);
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 391 goto out_copy;
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 392 }
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 393
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 394 tx = dmaengine_prep_slave_sg(info->dma, &sg, n,
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 395 is_write ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 396 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 397 if (!tx)
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 398 goto out_copy_unmap;
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 399
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 400 tx->callback = omap_nand_dma_callback;
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 401 tx->callback_param = &info->comp;
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 402 dmaengine_submit(tx);
763e7359109223 drivers/mtd/nand/omap2.c Russell King 2012-04-25 403
03d3a1df6da660 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 404 init_completion(&info->comp);
03d3a1df6da660 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 405
03d3a1df6da660 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 406 /* setup and start DMA using dma_addr */
03d3a1df6da660 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 407 dma_async_issue_pending(info->dma);
03d3a1df6da660 drivers/mtd/nand/omap2.c Cooper Jr., Franklin 2016-04-15 408
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 409 /* configure and start prefetch transfer */
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 410 ret = omap_prefetch_enable(info->gpmc_cs,
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 411 PREFETCH_FIFOTHRESHOLD_MAX, 0x1, len, is_write, info);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 412 if (ret)
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 413 /* PFPW engine is busy, use cpu copy method */
d7efe2281db535 drivers/mtd/nand/omap2.c Grazvydas Ignotas 2012-04-11 414 goto out_copy_unmap;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 415
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 416 wait_for_completion(&info->comp);
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 417 tim = 0;
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 418 limit = (loops_per_jiffy * msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS));
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 419
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 420 do {
4e070376165a9b drivers/mtd/nand/omap2.c Sukumar Ghorai 2011-01-28 421 cpu_relax();
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 422 val = readl(info->reg.gpmc_prefetch_status);
47f88af4ed80ac drivers/mtd/nand/omap2.c Afzal Mohammed 2012-09-29 423 val = PREFETCH_STATUS_COUNT(val);
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 424 } while (val && (tim++ < limit));
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 425
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 426 /* disable and stop the PFPW engine */
65b97cf6b8deca drivers/mtd/nand/omap2.c Afzal Mohammed 2012-08-30 427 omap_prefetch_reset(info->gpmc_cs, info);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 428
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 429 dma_unmap_sg(info->dma->device->dev, &sg, 1, dir);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 430 return 0;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 431
d7efe2281db535 drivers/mtd/nand/omap2.c Grazvydas Ignotas 2012-04-11 432 out_copy_unmap:
2df41d0533ad1a drivers/mtd/nand/omap2.c Russell King 2012-04-25 433 dma_unmap_sg(info->dma->device->dev, &sg, 1, dir);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 434 out_copy:
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 435 is_write == 0 ? omap_nand_data_in(chip, (void *)addr, len, false)
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 436 : omap_nand_data_out(chip, addr, len, false);
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 437
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 438 return 0;
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 439 }
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 440
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 441 /**
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 442 * omap_nand_data_in_dma_pref - NAND data in using DMA and Prefetch
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 443 */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 444 static void omap_nand_data_in_dma_pref(struct nand_chip *chip, void *buf,
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 445 unsigned int len, bool force_8bit)
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 @446 {
7e534323c41621 drivers/mtd/nand/raw/omap2.c Boris Brezillon 2018-09-06 447 struct mtd_info *mtd = nand_to_mtd(chip);
7e534323c41621 drivers/mtd/nand/raw/omap2.c Boris Brezillon 2018-09-06 448
4695a3cf004a44 drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 449 if (force_8bit) {
4695a3cf004a44 drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 450 omap_nand_data_in(chip, buf, len, force_8bit);
4695a3cf004a44 drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 451 return;
4695a3cf004a44 drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 452 }
4695a3cf004a44 drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 453
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 454 if (len <= mtd->oobsize)
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 455 omap_nand_data_in_pref(chip, buf, len, false);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 456 else
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 457 /* start transfer in DMA mode */
a9e849efca4f9c drivers/mtd/nand/raw/omap2.c Roger Quadros 2021-12-09 458 omap_nand_dma_transfer(chip, buf, len, 0x0);
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 459 }
dfe32893cbe3e5 drivers/mtd/nand/omap2.c vimal singh 2009-07-13 460
:::::: The code at line 260 was first introduced by commit
:::::: 67ce04bf2746f8a1f8c2a104b313d20c63f68378 mtd: nand: add OMAP2/OMAP3 NAND driver
:::::: TO: Vimal Singh <vimalsingh@...com>
:::::: CC: David Woodhouse <David.Woodhouse@...el.com>
--
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