[Skiboot] [PATCH 2/2] libflash: start using the blocklevel interface.
Cyril Bur
cyril.bur at au1.ibm.com
Thu May 21 17:31:03 AEST 2015
On Thu, 2015-05-21 at 11:53 +1000, Alistair Popple wrote:
> This looks ok, my only concern is that changing flash_write ->
> flash_smart_write in pflash is likely to reduce pflash performance. Is there a
> way we could not make that change in pflash for the moment? I have an idea for
> how we could fix it properly, but that change would be easier to do if we had
> these patches applied.
>
Agreed, however this all depends on if it is actually slower. I'll
confirm that tomorrow, if it is, we'll leave flash_write() exposed for
pflash.
The solution from there would be to make flash_smart_write() smarter and
ultimately wind up in blocklevel.
> Signed-off-by: Alistair Popple <alistair at popple.id.au>
> Reviewed-by: Alistair Popple <alistair at popple.id.au>
>
> On Thu, 14 May 2015 17:06:39 Cyril Bur wrote:
> > Converted all the libflash calls to use the blocklevel interface, modified
> > all callers to libflash to use the blocklevel interface.
> >
> > This patch should introduce next to no functional change.
> >
> > Signed-off-by: Cyril Bur <cyril.bur at au1.ibm.com>
> > ---
> > core/flash.c | 35 ++++++++++---------
> > external/pflash/Makefile | 2 +-
> > external/pflash/pflash.c | 33 +++++++++---------
> > include/skiboot.h | 4 ++-
> > libflash/libffs.c | 52 ++++++++++++++---------------
> > libflash/libffs.h | 7 ++--
> > libflash/libflash.c | 83
> > ++++++++++++++++++++++++++++------------------ libflash/libflash.h |
> > 25 +++++---------
> > libflash/test/test-flash.c | 20 +++++------
> > platforms/astbmc/pnor.c | 12 ++++---
> > platforms/rhesus/rhesus.c | 11 +++---
> > 11 files changed, 153 insertions(+), 131 deletions(-)
> >
> > diff --git a/core/flash.c b/core/flash.c
> > index 9018ecd..90dbac7 100644
> > --- a/core/flash.c
> > +++ b/core/flash.c
> > @@ -22,12 +22,13 @@
> > #include <device.h>
> > #include <libflash/libflash.h>
> > #include <libflash/libffs.h>
> > +#include <libflash/blocklevel.h>
> > #include <ecc.h>
> >
> > struct flash {
> > bool registered;
> > bool busy;
> > - struct flash_chip *chip;
> > + struct blocklevel_device *bl;
> > uint32_t size;
> > uint32_t block_size;
> > };
> > @@ -108,7 +109,7 @@ static int flash_nvram_start_read(void *dst, uint32_t
> > src, uint32_t len) goto out;
> > }
> >
> > - rc = flash_read(nvram_flash->chip, nvram_offset + src, dst, len);
> > + rc = blocklevel_read(nvram_flash->bl, nvram_offset + src, dst, len);
> >
> > out:
> > unlock(&flash_lock);
> > @@ -137,7 +138,7 @@ static int flash_nvram_write(uint32_t dst, void *src,
> > uint32_t len) rc = OPAL_PARAMETER;
> > goto out;
> > }
> > - rc = flash_smart_write(nvram_flash->chip, nvram_offset + dst, src,
> len);
> > + rc = blocklevel_write(nvram_flash->bl, nvram_offset + dst, src, len);
> >
> > out:
> > unlock(&flash_lock);
> > @@ -250,7 +251,7 @@ static void setup_system_flash(struct flash *flash,
> > struct dt_node *node, flash_nvram_probe(flash, ffs);
> > }
> >
> > -int flash_register(struct flash_chip *chip, bool is_system_flash)
> > +int flash_register(struct blocklevel_device *bl, bool is_system_flash)
> > {
> > uint32_t size, block_size;
> > struct ffs_handle *ffs;
> > @@ -260,7 +261,7 @@ int flash_register(struct flash_chip *chip, bool
> > is_system_flash) unsigned int i;
> > int rc;
> >
> > - rc = flash_get_info(chip, &name, &size, &block_size);
> > + rc = blocklevel_get_info(bl, &name, &size, &block_size);
> > if (rc)
> > return rc;
> >
> > @@ -276,7 +277,7 @@ int flash_register(struct flash_chip *chip, bool
> > is_system_flash) flash = &flashes[i];
> > flash->registered = true;
> > flash->busy = false;
> > - flash->chip = chip;
> > + flash->bl = bl;
> > flash->size = size;
> > flash->block_size = block_size;
> > break;
> > @@ -288,7 +289,7 @@ int flash_register(struct flash_chip *chip, bool
> > is_system_flash) return OPAL_RESOURCE;
> > }
> >
> > - rc = ffs_open_flash(chip, 0, flash->size, &ffs);
> > + rc = ffs_init(0, flash->size, bl, &ffs);
> > if (rc) {
> > prlog(PR_WARNING, "FLASH: No ffs info; "
> > "using raw device only\n");
> > @@ -346,13 +347,17 @@ static int64_t opal_flash_op(enum flash_op op,
> > uint64_t id, uint64_t offset,
> >
> > switch (op) {
> > case FLASH_OP_READ:
> > - rc = flash_read(flash->chip, offset, (void *)buf, size);
> > + rc = blocklevel_read(flash->bl, offset, (void *)buf, size);
> > break;
> > case FLASH_OP_WRITE:
> > - rc = flash_write(flash->chip, offset, (void *)buf, size,
> false);
> > + /*
> > + * Note: blocklevel_write() uses flash_smart_write(), this
> call used to
> > + * be flash_write()
> > + */
> > + rc = blocklevel_write(flash->bl, offset, (void *)buf, size);
> > break;
> > case FLASH_OP_ERASE:
> > - rc = flash_erase(flash->chip, offset, size);
> > + rc = blocklevel_erase(flash->bl, offset, size);
> > break;
> > default:
> > assert(0);
> > @@ -425,7 +430,7 @@ struct flash_hostboot_header {
> > };
> >
> > /* start and total size include ECC */
> > -static int flash_find_subpartition(struct flash_chip *chip, uint32_t subid,
> > +static int flash_find_subpartition(struct blocklevel_device *bl, uint32_t
> > subid, uint32_t *start, uint32_t *total_size,
> > bool *ecc)
> > {
> > @@ -444,7 +449,7 @@ static int flash_find_subpartition(struct flash_chip
> > *chip, uint32_t subid, partsize = BUFFER_SIZE_MINUS_ECC(*total_size);
> >
> > /* Get the TOC */
> > - rc = flash_read_corrected(chip, *start, header,
> > + rc = flash_read_corrected(bl, *start, header,
> > FLASH_SUBPART_HEADER_SIZE, ecc);
> > if (rc) {
> > prerror("FLASH: flash subpartition TOC read failed %i\n", rc);
> > @@ -564,7 +569,7 @@ static int flash_load_resource(enum resource_id id,
> > uint32_t subid, goto out_unlock;
> > }
> >
> > - rc = ffs_open_flash(flash->chip, 0, flash->size, &ffs);
> > + rc = ffs_init(0, flash->size, flash->bl, &ffs);
> > if (rc) {
> > prerror("FLASH: Can't open ffs handle\n");
> > goto out_unlock;
> > @@ -591,7 +596,7 @@ static int flash_load_resource(enum resource_id id,
> > uint32_t subid,
> >
> > /* Find the sub partition if required */
> > if (subid != RESOURCE_SUBID_NONE) {
> > - rc = flash_find_subpartition(flash->chip, subid, &part_start,
> > + rc = flash_find_subpartition(flash->bl, subid, &part_start,
> > &part_size, &ecc);
> > if (rc)
> > goto out_free_ffs;
> > @@ -614,7 +619,7 @@ static int flash_load_resource(enum resource_id id,
> > uint32_t subid, goto out_free_ffs;
> > }
> >
> > - rc = flash_read_corrected(flash->chip, part_start, buf, size, ecc);
> > + rc = flash_read_corrected(flash->bl, part_start, buf, size, ecc);
> > if (rc) {
> > prerror("FLASH: failed to read %s partition\n", name);
> > goto out_free_ffs;
> > diff --git a/external/pflash/Makefile b/external/pflash/Makefile
> > index c28e359..7771343 100644
> > --- a/external/pflash/Makefile
> > +++ b/external/pflash/Makefile
> > @@ -14,7 +14,7 @@ endif
> > CFLAGS = -O2 -Wall -I.
> > LDFLAGS = -lrt
> > OBJS = pflash.o progress.o ast-sf-ctrl.o
> > -OBJS += libflash/libflash.o libflash/libffs.o libflash/ecc.o
> > +OBJS += libflash/libflash.o libflash/libffs.o libflash/ecc.o
> > libflash/blocklevel.o OBJS += $(ARCH_OBJS)
> > EXE = pflash
> >
> > diff --git a/external/pflash/pflash.c b/external/pflash/pflash.c
> > index fb783a2..0958691 100644
> > --- a/external/pflash/pflash.c
> > +++ b/external/pflash/pflash.c
> > @@ -16,6 +16,7 @@
> >
> > #include <libflash/libflash.h>
> > #include <libflash/libffs.h>
> > +#include <libflash/blocklevel.h>
> > #include "progress.h"
> > #include "io.h"
> > #include "ast.h"
> > @@ -23,7 +24,7 @@
> >
> > #define __aligned(x) __attribute__((aligned(x)))
> >
> > -#define PFLASH_VERSION "0.8.6"
> > +#define PFLASH_VERSION "0.8.7"
> >
> > static bool must_confirm = true;
> > static bool dummy_run;
> > @@ -36,8 +37,8 @@ static bool using_sfc;
> > #define FILE_BUF_SIZE 0x10000
> > static uint8_t file_buf[FILE_BUF_SIZE] __aligned(0x1000);
> >
> > +static struct blocklevel_device *bl;
> > static struct spi_flash_ctrl *fl_ctrl;
> > -static struct flash_chip *fl_chip;
> > static struct ffs_handle *ffsh;
> > static uint32_t fl_total_size, fl_erase_granule;
> > static const char *fl_name;
> > @@ -84,7 +85,7 @@ static void print_flash_info(void)
> > return;
> >
> > if (!ffsh) {
> > - rc = ffs_open_flash(fl_chip, 0, 0, &ffsh);
> > + rc = ffs_init(0, fl_total_size, bl, &ffsh);
> > if (rc) {
> > fprintf(stderr, "Error %d opening ffs !\n", rc);
> > ffsh = NULL;
> > @@ -122,7 +123,7 @@ static void lookup_partition(const char *name)
> >
> > /* Open libffs if needed */
> > if (!ffsh) {
> > - rc = ffs_open_flash(fl_chip, 0, 0, &ffsh);
> > + rc = ffs_init(0, fl_total_size, bl, &ffsh);
> > if (rc) {
> > fprintf(stderr, "Error %d opening ffs !\n", rc);
> > exit(1);
> > @@ -158,7 +159,7 @@ static void erase_chip(void)
> > return;
> > }
> >
> > - rc = flash_erase_chip(fl_chip);
> > + rc = flash_erase_chip(bl);
> > if (rc) {
> > fprintf(stderr, "Error %d erasing chip\n", rc);
> > exit(1);
> > @@ -185,7 +186,7 @@ static void erase_range(uint32_t start, uint32_t size,
> > bool will_program) while(size) {
> > /* If aligned to 64k and at least 64k, use 64k erase */
> > if ((start & 0xffff) == 0 && size >= 0x10000) {
> > - rc = flash_erase(fl_chip, start, 0x10000);
> > + rc = blocklevel_erase(bl, start, 0x10000);
> > if (rc) {
> > fprintf(stderr, "Error %d erasing 0x%08x\n",
> > rc, start);
> > @@ -195,7 +196,7 @@ static void erase_range(uint32_t start, uint32_t size,
> > bool will_program) size -= 0x10000;
> > done += 0x10000;
> > } else {
> > - rc = flash_erase(fl_chip, start, 0x1000);
> > + rc = blocklevel_erase(bl, start, 0x1000);
> > if (rc) {
> > fprintf(stderr, "Error %d erasing 0x%08x\n",
> > rc, start);
> > @@ -252,7 +253,7 @@ static void program_file(const char *file, uint32_t
> > start, uint32_t size) len = size;
> > size -= len;
> > actual_size += len;
> > - rc = flash_write(fl_chip, start, file_buf, len, true);
> > + rc = blocklevel_write(bl, start, file_buf, len);
> > if (rc) {
> > if (rc == FLASH_ERR_VERIFY_FAILURE)
> > fprintf(stderr, "Verification failed for"
> > @@ -292,7 +293,7 @@ static void do_read_file(const char *file, uint32_t
> > start, uint32_t size) progress_init(size >> 8);
> > while(size) {
> > len = size > FILE_BUF_SIZE ? FILE_BUF_SIZE : size;
> > - rc = flash_read(fl_chip, start, file_buf, len);
> > + rc = blocklevel_read(bl, start, file_buf, len);
> > if (rc) {
> > fprintf(stderr, "Flash read error %d for"
> > " chunk at 0x%08x\n", rc, start);
> > @@ -318,7 +319,7 @@ static void enable_4B_addresses(void)
> >
> > printf("Switching to 4-bytes address mode\n");
> >
> > - rc = flash_force_4b_mode(fl_chip, true);
> > + rc = flash_force_4b_mode(bl, true);
> > if (rc) {
> > fprintf(stderr, "Error %d enabling 4b mode\n", rc);
> > exit(1);
> > @@ -331,7 +332,7 @@ static void disable_4B_addresses(void)
> >
> > printf("Switching to 3-bytes address mode\n");
> >
> > - rc = flash_force_4b_mode(fl_chip, false);
> > + rc = flash_force_4b_mode(bl, false);
> > if (rc) {
> > fprintf(stderr, "Error %d disabling 4b mode\n", rc);
> > exit(1);
> > @@ -342,7 +343,7 @@ static void flash_access_cleanup_bmc(void)
> > {
> > if (ffsh)
> > ffs_close(ffsh);
> > - flash_exit(fl_chip);
> > + flash_exit(bl);
> > ast_sf_close(fl_ctrl);
> > close_devs();
> > }
> > @@ -362,7 +363,7 @@ static void flash_access_setup_bmc(bool use_lpc, bool
> > need_write) }
> >
> > /* Open flash chip */
> > - rc = flash_init(fl_ctrl, &fl_chip);
> > + rc = flash_init(fl_ctrl, &bl);
> > if (rc) {
> > fprintf(stderr, "Failed to open flash chip\n");
> > exit(1);
> > @@ -380,7 +381,7 @@ static void flash_access_cleanup_pnor(void)
> >
> > if (ffsh)
> > ffs_close(ffsh);
> > - flash_exit(fl_chip);
> > + flash_exit(bl);
> > #ifdef __powerpc__
> > if (using_sfc)
> > sfc_close(fl_ctrl);
> > @@ -421,7 +422,7 @@ static void flash_access_setup_pnor(bool use_lpc, bool
> > use_sfc, bool need_write) #endif
> >
> > /* Open flash chip */
> > - rc = flash_init(fl_ctrl, &fl_chip);
> > + rc = flash_init(fl_ctrl, &bl);
> > if (rc) {
> > fprintf(stderr, "Failed to open flash chip\n");
> > exit(1);
> > @@ -698,7 +699,7 @@ int main(int argc, char *argv[])
> > flash_access_setup_pnor(use_lpc, has_sfc, erase || program);
> > }
> >
> > - rc = flash_get_info(fl_chip, &fl_name,
> > + rc = blocklevel_get_info(bl, &fl_name,
> > &fl_total_size, &fl_erase_granule);
> > if (rc) {
> > fprintf(stderr, "Error %d getting flash info\n", rc);
> > diff --git a/include/skiboot.h b/include/skiboot.h
> > index 9751a31..aa92f68 100644
> > --- a/include/skiboot.h
> > +++ b/include/skiboot.h
> > @@ -36,6 +36,8 @@
> > #include <ccan/endian/endian.h>
> > #include <ccan/str/str.h>
> >
> > +#include <libflash/blocklevel.h>
> > +
> > #include <mem-map.h>
> > #include <op-panel.h>
> > #include <platform.h>
> > @@ -214,7 +216,7 @@ extern void occ_fsp_init(void);
> >
> > /* flash support */
> > struct flash_chip;
> > -extern int flash_register(struct flash_chip *chip, bool is_system_flash);
> > +extern int flash_register(struct blocklevel_device *bl, bool
> > is_system_flash); extern int flash_start_preload_resource(enum resource_id
> > id, uint32_t subid, void *buf, size_t *len);
> > extern int flash_resource_loaded(enum resource_id id, uint32_t idx);
> > diff --git a/libflash/libffs.c b/libflash/libffs.c
> > index 2d05cc9..8a60bee 100644
> > --- a/libflash/libffs.c
> > +++ b/libflash/libffs.c
> > @@ -41,6 +41,7 @@ struct ffs_handle {
> > uint32_t max_size;
> > void *cache;
> > uint32_t cached_size;
> > + struct blocklevel_device *bl;
> > };
> >
> > static uint32_t ffs_checksum(void* data, size_t size)
> > @@ -71,31 +72,29 @@ static int ffs_check_convert_header(struct ffs_hdr *dst,
> > struct ffs_hdr *src) return 0;
> > }
> >
> > -int ffs_open_flash(struct flash_chip *chip, uint32_t offset,
> > - uint32_t max_size, struct ffs_handle **ffs)
> > +int ffs_init(uint32_t offset, uint32_t max_size, struct blocklevel_device
> > *bl, + struct ffs_handle **ffs)
> > {
> > struct ffs_hdr hdr;
> > struct ffs_handle *f;
> > - uint32_t fl_size, erase_size;
> > + uint32_t total_size;
> > int rc;
> >
> > - if (!ffs)
> > + if (!ffs || !bl)
> > return FLASH_ERR_PARM_ERROR;
> > *ffs = NULL;
> >
> > - /* Grab some info about our flash chip */
> > - rc = flash_get_info(chip, NULL, &fl_size, &erase_size);
> > + rc = blocklevel_get_info(bl, NULL, &total_size, NULL);
> > if (rc) {
> > - FL_ERR("FFS: Error %d retrieving flash info\n", rc);
> > - return rc;
> > - }
> > - if ((offset + max_size) < offset)
> > + FL_ERR("FFS: Error %d getting device total size", rc);
> > return FLASH_ERR_PARM_ERROR;
> > - if ((offset + max_size) > fl_size)
> > + }
> > +
> > + if ((offset + max_size) < offset || (offset + max_size) > total_size)
> > return FLASH_ERR_PARM_ERROR;
> >
> > /* Read flash header */
> > - rc = flash_read(chip, offset, &hdr, sizeof(hdr));
> > + rc = blocklevel_read(bl, offset, &hdr, sizeof(hdr));
> > if (rc) {
> > FL_ERR("FFS: Error %d reading flash header\n", rc);
> > return rc;
> > @@ -106,17 +105,15 @@ int ffs_open_flash(struct flash_chip *chip, uint32_t
> > offset, if (!f)
> > return FLASH_ERR_MALLOC_FAILED;
> > memset(f, 0, sizeof(*f));
> > - f->type = ffs_type_flash;
> > f->flash_offset = offset;
> > - f->max_size = max_size ? max_size : (fl_size - offset);
> > - f->chip = chip;
> > + f->max_size = max_size;
> > + f->bl = bl;
> >
> > /* Convert and check flash header */
> > rc = ffs_check_convert_header(&f->hdr, &hdr);
> > if (rc) {
> > FL_ERR("FFS: Error %d checking flash header\n", rc);
> > - free(f);
> > - return rc;
> > + goto out;
> > }
> >
> > /*
> > @@ -126,26 +123,26 @@ int ffs_open_flash(struct flash_chip *chip, uint32_t
> > offset, f->cached_size = f->hdr.block_size * f->hdr.size;
> > FL_DBG("FFS: Partition map size: 0x%x\n", f->cached_size);
> >
> > - /* Align to erase size */
> > - f->cached_size |= (erase_size - 1);
> > - f->cached_size &= ~(erase_size - 1);
> > - FL_DBG("FFS: Aligned to: 0x%x\n", f->cached_size);
> > -
> > /* Allocate cache */
> > f->cache = malloc(f->cached_size);
> > if (!f->cache) {
> > - free(f);
> > - return FLASH_ERR_MALLOC_FAILED;
> > + rc = FLASH_ERR_MALLOC_FAILED;
> > + goto out;
> > }
> >
> > /* Read the cached map */
> > - rc = flash_read(chip, offset, f->cache, f->cached_size);
> > + rc = blocklevel_read(bl, offset, f->cache, f->cached_size);
> > if (rc) {
> > FL_ERR("FFS: Error %d reading flash partition map\n", rc);
> > - free(f);
> > + goto out;
> > }
> > +
> > +out:
> > if (rc == 0)
> > *ffs = f;
> > + else
> > + free(f);
> > +
> > return rc;
> > }
> >
> > @@ -361,6 +358,7 @@ int ffs_update_act_size(struct ffs_handle *ffs, uint32_t
> > part_idx, ent->checksum = ffs_checksum(ent, FFS_ENTRY_SIZE_CSUM);
> > if (!ffs->chip)
> > return 0;
> > - return flash_smart_write(ffs->chip, offset, ent, FFS_ENTRY_SIZE);
> > +
> > + return blocklevel_write(ffs->bl, offset, ent, FFS_ENTRY_SIZE);
> > }
> >
> > diff --git a/libflash/libffs.h b/libflash/libffs.h
> > index dd58d28..a310172 100644
> > --- a/libflash/libffs.h
> > +++ b/libflash/libffs.h
> > @@ -18,6 +18,7 @@
> >
> > #include <libflash/libflash.h>
> > #include <libflash/ffs.h>
> > +#include <libflash/blocklevel.h>
> >
> > /* FFS handle, opaque */
> > struct ffs_handle;
> > @@ -34,8 +35,10 @@ struct ffs_handle;
> > #define FFS_ERR_PART_NOT_FOUND 103
> > #define FFS_ERR_BAD_ECC 104
> >
> > -int ffs_open_flash(struct flash_chip *chip, uint32_t offset,
> > - uint32_t max_size, struct ffs_handle **ffs);
> > +/* Init */
> > +
> > +int ffs_init(uint32_t offset, uint32_t max_size,
> > + struct blocklevel_device *bl, struct ffs_handle **ffs);
> >
> > /* ffs_open_image is Linux only as it uses lseek, which skiboot does not
> > * implement */
> > diff --git a/libflash/libflash.c b/libflash/libflash.c
> > index e43be4f..2af0c79 100644
> > --- a/libflash/libflash.c
> > +++ b/libflash/libflash.c
> > @@ -20,6 +20,7 @@
> > #include "libflash.h"
> > #include "libflash-priv.h"
> > #include "ecc.h"
> > +#include "blocklevel.h"
> >
> > #ifndef MIN
> > #define MIN(a, b) ((a) < (b) ? (a) : (b))
> > @@ -45,6 +46,7 @@ struct flash_chip {
> > bool mode_4b; /* Flash currently in 4b mode
> */
> > struct flash_req *cur_req; /* Current request */
> > void *smart_buf; /* Buffer for smart writes */
> > + struct blocklevel_device bl;
> > };
> >
> > #ifndef __SKIBOOT__
> > @@ -112,8 +114,9 @@ int fl_wren(struct spi_flash_ctrl *ct)
> > return FLASH_ERR_WREN_TIMEOUT;
> > }
> >
> > -int flash_read(struct flash_chip *c, uint32_t pos, void *buf, uint32_t len)
> > +static int flash_read(struct blocklevel_device *bl, uint32_t pos, void
> > *buf, uint32_t len) {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > struct spi_flash_ctrl *ct = c->ctrl;
> >
> > /* XXX Add sanity/bound checking */
> > @@ -138,7 +141,7 @@ int flash_read(struct flash_chip *c, uint32_t pos, void
> > *buf, uint32_t len) * This provides a wrapper around flash_read on ECCed
> > data
> > * len is length of data without ECC attached
> > */
> > -int flash_read_corrected(struct flash_chip *c, uint32_t pos, void *buf,
> > +int flash_read_corrected(struct blocklevel_device *bl, uint32_t pos, void
> > *buf, uint32_t len, bool ecc)
> > {
> > struct ecc64 *bufecc;
> > @@ -147,7 +150,7 @@ int flash_read_corrected(struct flash_chip *c, uint32_t
> > pos, void *buf, uint8_t ret;
> >
> > if (!ecc)
> > - return flash_read(c, pos, buf, len);
> > + return flash_read(bl, pos, buf, len);
> >
> > /* Copy the buffer in chunks */
> > bufecc = malloc(ECC_BUFFER_SIZE(COPY_BUFFER_LENGTH));
> > @@ -159,7 +162,7 @@ int flash_read_corrected(struct flash_chip *c, uint32_t
> > pos, void *buf, copylen = MIN(len, COPY_BUFFER_LENGTH);
> >
> > /* Read ECCed data from flash */
> > - rc = flash_read(c, pos, bufecc, ECC_BUFFER_SIZE(copylen));
> > + rc = flash_read(bl, pos, bufecc, ECC_BUFFER_SIZE(copylen));
> > if (rc)
> > goto err;
> >
> > @@ -215,8 +218,9 @@ static void fl_get_best_erase(struct flash_chip *c,
> > uint32_t dst, uint32_t size, *cmd = CMD_BE;
> > }
> >
> > -int flash_erase(struct flash_chip *c, uint32_t dst, uint32_t size)
> > +static int flash_erase(struct blocklevel_device *bl, uint32_t dst, uint32_t
> > size) {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > struct spi_flash_ctrl *ct = c->ctrl;
> > uint32_t chunk;
> > uint8_t cmd;
> > @@ -262,8 +266,9 @@ int flash_erase(struct flash_chip *c, uint32_t dst,
> > uint32_t size) return 0;
> > }
> >
> > -int flash_erase_chip(struct flash_chip *c)
> > +int flash_erase_chip(struct blocklevel_device *bl)
> > {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > struct spi_flash_ctrl *ct = c->ctrl;
> > int rc;
> >
> > @@ -311,9 +316,10 @@ static int fl_wpage(struct flash_chip *c, uint32_t dst,
> > const void *src, return fl_sync_wait_idle(ct);
> > }
> >
> > -int flash_write(struct flash_chip *c, uint32_t dst, const void *src,
> > +static int flash_write(struct blocklevel_device *bl, uint32_t dst, const
> > void *src, uint32_t size, bool verify)
> > {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > struct spi_flash_ctrl *ct = c->ctrl;
> > uint32_t todo = size;
> > uint32_t d = dst;
> > @@ -374,7 +380,7 @@ int flash_write(struct flash_chip *c, uint32_t dst,
> > const void *src, chunk = sizeof(vbuf);
> > if (chunk > size)
> > chunk = size;
> > - rc = flash_read(c, dst, vbuf, chunk);
> > + rc = flash_read(bl, dst, vbuf, chunk);
> > if (rc) return rc;
> > if (memcmp(vbuf, src, chunk)) {
> > FL_ERR("LIBFLASH: Miscompare at 0x%08x\n", dst);
> > @@ -387,7 +393,7 @@ int flash_write(struct flash_chip *c, uint32_t dst,
> > const void *src, return 0;
> > }
> >
> > -int flash_write_corrected(struct flash_chip *c, uint32_t pos, const void
> > *buf, +int flash_write_corrected(struct blocklevel_device *bl, uint32_t
> > pos, const void *buf, uint32_t len, bool verify, bool ecc)
> > {
> > struct ecc64 *bufecc;
> > @@ -396,7 +402,7 @@ int flash_write_corrected(struct flash_chip *c, uint32_t
> > pos, const void *buf, uint8_t ret;
> >
> > if (!ecc)
> > - return flash_write(c, pos, buf, len, verify);
> > + return flash_write(bl, pos, buf, len, verify);
> >
> > /* Copy the buffer in chunks */
> > bufecc = malloc(ECC_BUFFER_SIZE(COPY_BUFFER_LENGTH));
> > @@ -415,7 +421,7 @@ int flash_write_corrected(struct flash_chip *c, uint32_t
> > pos, const void *buf, }
> >
> > /* Write ECCed data to the flash */
> > - rc = flash_write(c, pos, bufecc, copylen, verify);
> > + rc = flash_write(bl, pos, bufecc, copylen, verify);
> > if (rc)
> > goto err;
> >
> > @@ -463,12 +469,12 @@ static enum sm_comp_res flash_smart_comp(struct
> > flash_chip *c, return is_same ? sm_no_change : sm_need_write;
> > }
> >
> > -int flash_smart_write(struct flash_chip *c, uint32_t dst, const void *src,
> > - uint32_t size)
> > +static int flash_smart_write(struct blocklevel_device *bl, uint32_t dst,
> > const void *src, uint32_t size) {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > uint32_t er_size = c->min_erase_mask + 1;
> > uint32_t end = dst + size;
> > - int rc;
> > + int rc;
> >
> > /* Some sanity checking */
> > if (end <= dst || !size || end > c->tsize) {
> > @@ -489,7 +495,7 @@ int flash_smart_write(struct flash_chip *c, uint32_t
> > dst, const void *src, off = dst & c->min_erase_mask;
> > FL_DBG("LIBFLASH: reading page 0x%08x..0x%08x...",
> > page, page + er_size);
> > - rc = flash_read(c, page, c->smart_buf, er_size);
> > + rc = flash_read(bl, page, c->smart_buf, er_size);
> > if (rc) {
> > FL_DBG(" error %d!\n", rc);
> > return rc;
> > @@ -510,7 +516,7 @@ int flash_smart_write(struct flash_chip *c, uint32_t
> > dst, const void *src, case sm_need_write:
> > /* Just needs writing over */
> > FL_DBG(" need write !\n");
> > - rc = flash_write(c, dst, src, chunk, true);
> > + rc = flash_write(bl, dst, src, chunk, true);
> > if (rc) {
> > FL_DBG("LIBFLASH: Write error %d !\n", rc);
> > return rc;
> > @@ -518,14 +524,14 @@ int flash_smart_write(struct flash_chip *c, uint32_t
> > dst, const void *src, break;
> > case sm_need_erase:
> > FL_DBG(" need erase !\n");
> > - rc = flash_erase(c, page, er_size);
> > + rc = flash_erase(bl, page, er_size);
> > if (rc) {
> > FL_DBG("LIBFLASH: erase error %d !\n", rc);
> > return rc;
> > }
> > /* Then update the portion of the buffer and write the
> block */
> > memcpy(c->smart_buf + off, src, chunk);
> > - rc = flash_write(c, page, c->smart_buf, er_size,
> true);
> > + rc = flash_write(bl, page, c->smart_buf, er_size,
> true);
> > if (rc) {
> > FL_DBG("LIBFLASH: write error %d !\n", rc);
> > return rc;
> > @@ -539,14 +545,14 @@ int flash_smart_write(struct flash_chip *c, uint32_t
> > dst, const void *src, return 0;
> > }
> >
> > -int flash_smart_write_corrected(struct flash_chip *c, uint32_t dst, const
> > void *src, +int flash_smart_write_corrected(struct blocklevel_device *bl,
> > uint32_t dst, const void *src, uint32_t size, bool ecc)
> > {
> > struct ecc64 *buf;
> > int rc;
> >
> > if (!ecc)
> > - return flash_smart_write(c, dst, src, size);
> > + return flash_smart_write(bl, dst, src, size);
> >
> > buf = malloc(ECC_BUFFER_SIZE(size));
> > if (!buf)
> > @@ -558,7 +564,7 @@ int flash_smart_write_corrected(struct flash_chip *c,
> > uint32_t dst, const void * goto out;
> > }
> >
> > - rc = flash_smart_write(c, dst, buf, ECC_BUFFER_SIZE(size));
> > + rc = flash_smart_write(bl, dst, buf, ECC_BUFFER_SIZE(size));
> >
> > out:
> > free(buf);
> > @@ -684,8 +690,9 @@ static int flash_set_4b(struct flash_chip *c, bool
> > enable) return ct->cmd_wr(ct, enable ? CMD_EN4B : CMD_EX4B, false, 0, NULL,
> > 0); }
> >
> > -int flash_force_4b_mode(struct flash_chip *c, bool enable_4b)
> > +int flash_force_4b_mode(struct blocklevel_device *bl, bool enable_4b)
> > {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > struct spi_flash_ctrl *ct = c->ctrl;
> > int rc;
> >
> > @@ -776,24 +783,29 @@ static int flash_configure(struct flash_chip *c)
> > return 0;
> > }
> >
> > -int flash_get_info(struct flash_chip *chip, const char **name,
> > +static int flash_get_info(struct blocklevel_device *bl, const char **name,
> > uint32_t *total_size, uint32_t *erase_granule)
> > {
> > + struct flash_chip *c = container_of(bl, struct flash_chip, bl);
> > if (name)
> > - *name = chip->info.name;
> > + *name = c->info.name;
> > if (total_size)
> > - *total_size = chip->tsize;
> > + *total_size = c->tsize;
> > if (erase_granule)
> > - *erase_granule = chip->min_erase_mask + 1;
> > + *erase_granule = c->min_erase_mask + 1;
> > return 0;
> > }
> >
> > -int flash_init(struct spi_flash_ctrl *ctrl, struct flash_chip **flash)
> > +int flash_init(struct spi_flash_ctrl *ctrl, struct blocklevel_device **bl)
> > {
> > struct flash_chip *c;
> > int rc;
> >
> > - *flash = NULL;
> > + if (!bl)
> > + return FLASH_ERR_PARM_ERROR;
> > +
> > + *bl = NULL;
> > +
> > c = malloc(sizeof(struct flash_chip));
> > if (!c)
> > return FLASH_ERR_MALLOC_FAILED;
> > @@ -814,18 +826,25 @@ int flash_init(struct spi_flash_ctrl *ctrl, struct
> > flash_chip **flash) rc = flash_configure(c);
> > if (rc)
> > FL_ERR("LIBFLASH: Flash configuration failed\n");
> > - bail:
> > +bail:
> > if (rc) {
> > free(c);
> > return rc;
> > }
> > - *flash = c;
> > +
> > + c->bl.read = &flash_read;
> > + c->bl.write = &flash_smart_write;
> > + c->bl.erase = &flash_erase;
> > + c->bl.get_info = &flash_get_info;
> > +
> > + *bl = &(c->bl);
> > return 0;
> > }
> >
> > -void flash_exit(struct flash_chip *chip)
> > +void flash_exit(struct blocklevel_device *bl)
> > {
> > /* XXX Make sure we are idle etc... */
> > - free(chip);
> > + if (bl)
> > + free(container_of(bl, struct flash_chip, bl));
> > }
> >
> > diff --git a/libflash/libflash.h b/libflash/libflash.h
> > index 7ed65d0..30f984d 100644
> > --- a/libflash/libflash.h
> > +++ b/libflash/libflash.h
> > @@ -18,6 +18,7 @@
> >
> > #include <stdint.h>
> > #include <stdbool.h>
> > +#include <libflash/blocklevel.h>
> >
> > #ifdef __SKIBOOT__
> > #include <skiboot.h>
> > @@ -59,18 +60,13 @@ extern bool libflash_debug;
> > struct flash_chip;
> > struct spi_flash_ctrl;
> >
> > -int flash_init(struct spi_flash_ctrl *ctrl, struct flash_chip **flash);
> > -void flash_exit(struct flash_chip *chip);
> > -
> > -int flash_get_info(struct flash_chip *chip, const char **name,
> > - uint32_t *total_size, uint32_t *erase_granule);
> > +int flash_init(struct spi_flash_ctrl *ctrl, struct blocklevel_device **bl);
> > +void flash_exit(struct blocklevel_device *bl);
> >
> > /* libflash sets the 4b mode automatically based on the flash
> > * size and controller capabilities but it can be overriden
> > */
> > -int flash_force_4b_mode(struct flash_chip *chip, bool enable_4b);
> > -
> > -int flash_read(struct flash_chip *c, uint32_t pos, void *buf, uint32_t
> > len); +int flash_force_4b_mode(struct blocklevel_device *bl, bool
> > enable_4b);
> >
> > /*
> > * This provides a wapper around flash_read() on ECCed data. All params are
> > @@ -80,11 +76,8 @@ int flash_read(struct flash_chip *c, uint32_t pos, void
> > *buf, uint32_t len); * len is length of data without ecc attached therefore
> > this will read beyond * pos + len.
> > */
> > -int flash_read_corrected(struct flash_chip *c, uint32_t pos, void *buf,
> > +int flash_read_corrected(struct blocklevel_device *bl, uint32_t pos, void
> > *buf, uint32_t len, bool ecc);
> > -int flash_erase(struct flash_chip *c, uint32_t dst, uint32_t size);
> > -int flash_write(struct flash_chip *c, uint32_t dst, const void *src,
> > - uint32_t size, bool verify);
> >
> > /*
> > * This provides a wrapper around flash_write() on ECCed data. All params
> > are @@ -94,10 +87,8 @@ int flash_write(struct flash_chip *c, uint32_t dst,
> > const void *src, * size is length of data without ECC attached therefore
> > this will write beyond * dst + size.
> > */
> > -int flash_write_corrected(struct flash_chip *c, uint32_t dst, const void
> > *src, +int flash_write_corrected(struct blocklevel_device *bl, uint32_t
> > dst, const void *src, uint32_t size, bool verify, bool ecc);
> > -int flash_smart_write(struct flash_chip *c, uint32_t dst, const void *src,
> > - uint32_t size);
> >
> > /*
> > * This provides a wrapper around flash_smart_write() on ECCed data. All
> > @@ -107,12 +98,12 @@ int flash_smart_write(struct flash_chip *c, uint32_t
> > dst, const void *src, * size is length of data without ECC attached
> > therefore this will write beyond * dst + size.
> > */
> > -int flash_smart_write_corrected(struct flash_chip *c, uint32_t dst, const
> > void *src, +int flash_smart_write_corrected(struct blocklevel_device *bl,
> > uint32_t dst, const void *src, uint32_t size, bool ecc);
> >
> > /* chip erase may not be supported by all chips/controllers, get ready
> > * for FLASH_ERR_CHIP_ER_NOT_SUPPORTED
> > */
> > -int flash_erase_chip(struct flash_chip *c);
> > +int flash_erase_chip(struct blocklevel_device *bl);
> >
> > #endif /* __LIBFLASH_H */
> > diff --git a/libflash/test/test-flash.c b/libflash/test/test-flash.c
> > index 4479b5a..cf2b3a5 100644
> > --- a/libflash/test/test-flash.c
> > +++ b/libflash/test/test-flash.c
> > @@ -366,7 +366,7 @@ struct spi_flash_ctrl sim_ctrl = {
> >
> > int main(void)
> > {
> > - struct flash_chip *fl;
> > + struct blocklevel_device *bl;
> > uint32_t total_size, erase_granule;
> > const char *name;
> > uint16_t *test;
> > @@ -378,12 +378,12 @@ int main(void)
> > memset(sim_image, 0xff, sim_image_sz);
> > test = malloc(0x10000 * 2);
> >
> > - rc = flash_init(&sim_ctrl, &fl);
> > + rc = flash_init(&sim_ctrl, &bl);
> > if (rc) {
> > ERR("flash_init failed with err %d\n", rc);
> > exit(1);
> > }
> > - rc = flash_get_info(fl, &name, &total_size, &erase_granule);
> > + rc = flash_get_info(bl, &name, &total_size, &erase_granule);
> > if (rc) {
> > ERR("flash_get_info failed with err %d\n", rc);
> > exit(1);
> > @@ -395,13 +395,13 @@ int main(void)
> >
> > /* Write 64k of stuff at 0 and at 128k */
> > printf("Writing test patterns...\n");
> > - flash_smart_write(fl, 0, test, 0x10000);
> > - flash_smart_write(fl, 0x20000, test, 0x10000);
> > + flash_smart_write(bl, 0, test, 0x10000);
> > + flash_smart_write(bl, 0x20000, test, 0x10000);
> >
> > /* Write "Hello world" straddling the 64k boundary */
> > #define HW "Hello World"
> > printf("Writing test string...\n");
> > - flash_smart_write(fl, 0xfffc, HW, sizeof(HW));
> > + flash_smart_write(bl, 0xfffc, HW, sizeof(HW));
> >
> > /* Check result */
> > if (memcmp(sim_image + 0xfffc, HW, sizeof(HW))) {
> > @@ -416,7 +416,7 @@ int main(void)
> > printf("Test pattern pass\n");
> >
> > printf("Test ECC interfaces\n");
> > - flash_smart_write_corrected(fl, 0, test, 0x10000, 1);
> > + flash_smart_write_corrected(bl, 0, test, 0x10000, 1);
> > ecc_test = (struct ecc64 *)sim_image;
> > test64 = (uint64_t *)test;
> > for (i = 0; i < 0x10000 / sizeof(*ecc_test); i++) {
> > @@ -433,7 +433,7 @@ int main(void)
> > printf("Test ECC interface pass\n");
> >
> > printf("Test ECC erase\n");
> > - if (flash_erase(fl, 0, 0x10000) != 0) {
> > + if (flash_erase(bl, 0, 0x10000) != 0) {
> > ERR("flash_erase didn't return 0\n");
> > exit(1);
> > }
> > @@ -444,7 +444,7 @@ int main(void)
> > ERR("Data not properly cleared at %d\n", i);
> > exit(1);
> > }
> > - rc = flash_write(fl, i * sizeof(*ecc_test) + 8, &zero, 1, 0);
> > + rc = flash_write(bl, i * sizeof(*ecc_test) + 8, &zero, 1, 0);
> > if (rc || ecc_test[i].ecc != 0) {
> > ERR("Cleared data not correctly ECCed: 0x%02x
> (0x%016lx) expecting 0 at
> > %d\n", ecc_test[i].ecc, ecc_test[i].data, i); exit(1);
> > @@ -452,7 +452,7 @@ int main(void)
> > }
> > printf("Test ECC erase pass\n");
> >
> > - flash_exit(fl);
> > + flash_exit(bl);
> >
> > return 0;
> > }
> > diff --git a/platforms/astbmc/pnor.c b/platforms/astbmc/pnor.c
> > index d294c1f..634cb86 100644
> > --- a/platforms/astbmc/pnor.c
> > +++ b/platforms/astbmc/pnor.c
> > @@ -20,6 +20,7 @@
> > #include <opal.h>
> > #include <libflash/libflash.h>
> > #include <libflash/libffs.h>
> > +#include <libflash/blocklevel.h>
> > #include <ast.h>
> >
> > #include "astbmc.h"
> > @@ -27,7 +28,7 @@
> > int pnor_init(void)
> > {
> > struct spi_flash_ctrl *pnor_ctrl;
> > - struct flash_chip *pnor_chip = NULL;
> > + struct blocklevel_device *bl;
> > int rc;
> >
> > /* Open controller and flash. If the LPC->AHB doesn't point to
> > @@ -44,19 +45,20 @@ int pnor_init(void)
> > prerror("PLAT: Failed to open PNOR flash controller\n");
> > goto fail;
> > }
> > - rc = flash_init(pnor_ctrl, &pnor_chip);
> > +
> > + rc = flash_init(pnor_ctrl, &bl);
> > if (rc) {
> > prerror("PLAT: Failed to open init PNOR driver\n");
> > goto fail;
> > }
> >
> > - rc = flash_register(pnor_chip, true);
> > + rc = flash_register(bl, true);
> > if (!rc)
> > return 0;
> >
> > fail:
> > - if (pnor_chip)
> > - flash_exit(pnor_chip);
> > + if (bl)
> > + flash_exit(bl);
> > if (pnor_ctrl)
> > ast_sf_close(pnor_ctrl);
> >
> > diff --git a/platforms/rhesus/rhesus.c b/platforms/rhesus/rhesus.c
> > index 27e1c91..855d0e4 100644
> > --- a/platforms/rhesus/rhesus.c
> > +++ b/platforms/rhesus/rhesus.c
> > @@ -22,6 +22,7 @@
> > #include <opal.h>
> > #include <libflash/libflash.h>
> > #include <libflash/libffs.h>
> > +#include <libflash/blocklevel.h>
> > #include <sfc-ctrl.h>
> > #include <ec/config.h>
> > #include <ec/gpio.h>
> > @@ -118,7 +119,7 @@ static int64_t rhesus_power_down(uint64_t request
> > __unused) static int rhesus_pnor_init(void)
> > {
> > struct spi_flash_ctrl *pnor_ctrl;
> > - struct flash_chip *pnor_chip = NULL;
> > + struct blocklevel_device *bl;
> > int rc;
> >
> > /* Open controller, flash and ffs */
> > @@ -127,19 +128,19 @@ static int rhesus_pnor_init(void)
> > prerror("PLAT: Failed to open PNOR flash controller\n");
> > goto fail;
> > }
> > - rc = flash_init(pnor_ctrl, &pnor_chip);
> > + rc = flash_init(pnor_ctrl, &bl);
> > if (rc) {
> > prerror("PLAT: Failed to open init PNOR driver\n");
> > goto fail;
> > }
> >
> > - rc = flash_register(pnor_chip, true);
> > + rc = flash_register(bl, true);
> > if (!rc)
> > return 0;
> >
> > fail:
> > - if (pnor_chip)
> > - flash_exit(pnor_chip);
> > + if (bl)
> > + flash_exit(bl);
> > if (pnor_ctrl)
> > sfc_close(pnor_ctrl);
>
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