Date: Sat, 2 Mar 2019 23:20:47 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r344734 - in head: share/man/man4 sys/dev/flash Message-ID: <201903022320.x22NKl5F092272@repo.freebsd.org>
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Author: ian Date: Sat Mar 2 23:20:47 2019 New Revision: 344734 URL: https://svnweb.freebsd.org/changeset/base/344734 Log: Allow the sector size of the disk device to be configured using hints or FDT data. The sector size must be a multiple of the device's page size. If not configured, use the historical default of the device page size. Setting the disk sector size to 512 or 4096 allows a variety of standard filesystems to be used on the device. Of course you wouldn't want to be writing frequently to a SPI flash chip like it was a disk drive, but for data that gets written once (or rarely) and read often, using a standard filesystem is a nice convenient thing. Modified: head/share/man/man4/at45d.4 head/sys/dev/flash/at45d.c Modified: head/share/man/man4/at45d.4 ============================================================================== --- head/share/man/man4/at45d.4 Sat Mar 2 22:28:43 2019 (r344733) +++ head/share/man/man4/at45d.4 Sat Mar 2 23:20:47 2019 (r344734) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd February 26, 2019 +.Dd March 2, 2019 .Dt AT45D 4 .Os .Sh NAME @@ -126,6 +126,10 @@ The following properties are optional for the .Nm device subnode: .Bl -tag -width indent +.It Va freebsd,sectorsize +The sector size of the disk created for this storage device. +It must be a multiple of the device's page size. +The default is the device page size. .It Va spi-cpha Empty property indicating the slave device requires shifted clock phase (CPHA) mode. @@ -156,6 +160,10 @@ The chip-select number to assert when performing I/O f Set the high bit (1 << 31) to invert the logic level of the chip select line. .It Va hint.at45d.%d.mode The SPI mode (0-3) to use when communicating with this device. +.It Va hint.at45d.%d.sectorsize +The sector size of the disk created for this storage device. +It must be a multiple of the device's page size. +The default is the device page size. .El .Sh FILES .Bl -tag -width /dev/flash/at45d? Modified: head/sys/dev/flash/at45d.c ============================================================================== --- head/sys/dev/flash/at45d.c Sat Mar 2 22:28:43 2019 (r344733) +++ head/sys/dev/flash/at45d.c Sat Mar 2 23:20:47 2019 (r344734) @@ -288,9 +288,11 @@ at45d_detach(device_t dev) AT45D_UNLOCK(sc); if (err == 0 && sc->taskstate == TSTATE_STOPPED) { - disk_destroy(sc->disk); - bioq_flush(&sc->bio_queue, NULL, ENXIO); - free(sc->dummybuf, M_DEVBUF); + if (sc->disk) { + disk_destroy(sc->disk); + bioq_flush(&sc->bio_queue, NULL, ENXIO); + free(sc->dummybuf, M_DEVBUF); + } AT45D_LOCK_DESTROY(sc); } return (err); @@ -303,6 +305,7 @@ at45d_delayed_attach(void *xsc) struct at45d_mfg_info mfginfo; const struct at45d_flash_ident *ident; u_int i; + int sectorsize; uint32_t jedec; uint16_t pagesize; uint8_t status; @@ -340,6 +343,30 @@ at45d_delayed_attach(void *xsc) pagesize = ident->pagesize; sc->pagesize = pagesize; + /* + * By default we set up a disk with a sector size that matches the + * device page size. If there is a device hint or fdt property + * requesting a different size, use that, as long as it is a multiple of + * the device page size). + */ + sectorsize = pagesize; +#ifdef FDT + { + pcell_t size; + if (OF_getencprop(ofw_bus_get_node(sc->dev), + "freebsd,sectorsize", &size, sizeof(size)) > 0) + sectorsize = size; + } +#endif + resource_int_value(device_get_name(sc->dev), device_get_unit(sc->dev), + "sectorsize", §orsize); + + if ((sectorsize % pagesize) != 0) { + device_printf(sc->dev, "Invalid sectorsize %d, " + "must be a multiple of %d\n", sectorsize, pagesize); + return; + } + sc->dummybuf = malloc(pagesize, M_DEVBUF, M_WAITOK | M_ZERO); sc->disk = disk_alloc(); @@ -350,7 +377,7 @@ at45d_delayed_attach(void *xsc) sc->disk->d_name = "flash/at45d"; sc->disk->d_drv1 = sc; sc->disk->d_maxsize = DFLTPHYS; - sc->disk->d_sectorsize = pagesize; + sc->disk->d_sectorsize = sectorsize; sc->disk->d_mediasize = pagesize * ident->pagecount; sc->disk->d_unit = device_get_unit(sc->dev); disk_create(sc->disk, DISK_VERSION); @@ -358,9 +385,10 @@ at45d_delayed_attach(void *xsc) bioq_init(&sc->bio_queue); kproc_create(&at45d_task, sc, &sc->p, 0, 0, "task: at45d flash"); sc->taskstate = TSTATE_RUNNING; - device_printf(sc->dev, "%s, %d bytes per page, %d pages; %d KBytes\n", + device_printf(sc->dev, + "%s, %d bytes per page, %d pages; %d KBytes; disk sector size %d\n", ident->name, pagesize, ident->pagecount, - (pagesize * ident->pagecount) / 1024); + (pagesize * ident->pagecount) / 1024, sectorsize); } static int
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