Hi Miquel > From: Miquel Raynal <miquel.ray...@bootlin.com> > Sent: jeudi 26 septembre 2019 11:43 > > Hi Patrick, > > Patrick DELAUNAY <patrick.delau...@st.com> wrote on Thu, 26 Sep 2019 > 09:31:46 +0000: > > > Hi Stefan, > > > > > From: Stefan Roese <s...@denx.de> > > > Sent: vendredi 20 septembre 2019 11:20 > > > > > > Hi Patrick, > > > > > > On 20.09.19 09:20, Patrick Delaunay wrote: > > > > This patch modify the loop in mtd erase command to erase one by > > > > one the blocks in the requested area. > > > > > > > > It solves issue on "mtd erase" command on nand with existing bad > > > > block, the command is interrupted on the first bad block with the trace: > > > > "Skipping bad block at 0xffffffffffffffff" > > > > > > > > In MTD driver (nand/raw), when a bad block is present on the MTD > > > > device, the erase_op.fail_addr is not updated and we have the > > > > initial value MTD_FAIL_ADDR_UNKNOWN = (ULL)-1. > > > > > > So here is the difference? I remember testing this on a board with > > > SPI NAND and here it worked correctly. But your test case is with RAW > NAND? > > > > Yes with RAW nand. > > > > it is the difference the U-Boot code, for SPI nan use: > > int nanddev_mtd_erase() > > > > the fail address is always updated > > => einfo->fail_addr = nanddev_pos_to_offs(nand, &pos); > > > > > > > Do you have a change to also test this on a board with SPI NAND? > > > > I do the test a SPI-NAND today. > > > > The mtd erase command was functional on SPI-ANND before my patch : > > I create 2 bad block manually and they are correctly skipped. > > > > STM32MP> mtd list > > List of MTD devices: > > * spi-nand0 > > - device: spi-nand@0 > > - parent: qspi@58003000 > > - driver: spi_nand > > - type: NAND flash > > - block size: 0x20000 bytes > > - min I/O: 0x800 bytes > > - OOB size: 128 bytes > > - OOB available: 62 bytes > > - 0x000000000000-0x000010000000 : "spi-nand0" > > - 0x000000000000-0x000000200000 : "fsbl" > > - 0x000000200000-0x000000400000 : "ssbl1" > > - 0x000000400000-0x000000600000 : "ssbl2" > > - 0x000000600000-0x000010000000 : "UBI" > > > > STM32MP> mtd erase spi-nand0 0x00000000 0x10000000 > > Erasing 0x00000000 ... 0x0fffffff (2048 eraseblock(s)) > > 0x0fd00000: bad block > > 0x0fd20000: bad block > > attempt to erase a bad/reserved block @fd00000 Skipping bad block at > > 0x0fd00000 attempt to erase a bad/reserved block @fd20000 Skipping bad > > block at 0x0fd20000 > > 0x0fd00000: bad block > > 0x0fd20000: bad block > > > > > > > Thanks, > > > Stefan > > > > > > > What it is the better solution for you ? > > > > update the MTD command (my patch) or allign the behavior of the 2 MTD > > devices > > - MTD RAW NAND (nand_base.c:: nand_erase_nand) > > - MTD SPI NAND (core.c:: nanddev_mtd_erase) > > Do you think it is easy to make use of nanddev_mtd_erase() from the raw NAND > core? It is probably a little bit more elegant (and efficient) to do all in > one go than > iterating over each block (while there is a helper in the core to do that).
Yes, I agree: it will be more elegant. But, I am not comfortable with MTD Raw NAND framework. Based on a quick check between Linux Kernel 5.3 and U-Boot, it seems that U-Boot Raw NAND framework is aligned with Kernel 4.19 Raw NAND framework. To be able to use nanddev_mtd_erase API, we should backport Raw NAND framework from Kernel 5.3 because nanddev_mtd_erase can be used only if memorg structure is properly set (has been done on Kernel 5.2). I have not checked all potential impacts to use this API, but a backport form Kernel Raw NAND framework is needed in U-Boot in a first step. As I am not comfortable with MTD frameworks, I think that my patch could be currently applied to solve this issue, and in a second step, when a MTD expert will backport the framework, it could be removed. PS: A other solution with minimize the impacts in MTD, it is to change only nand_base.c:nand_erase_nand(), to update the fail_addr: ----------------------- drivers/mtd/nand/raw/nand_base.c ----------------------- index aba8ac019d..50542a2b9a 100644 @@ -3554,6 +3554,8 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, pr_warn("%s: attempt to erase a bad block at page 0x%08x\n", __func__, page); instr->state = MTD_ERASE_FAILED; + instr->fail_addr = + ((loff_t)page << chip->page_shift); goto erase_exit; } But as it is also a common MTD part with Linux kernel so I continue to prefer my patch on U-Boot only code. > > Thanks, > Miquèl Regards Patrick _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot