Author: jhibbits
Date: Fri Apr 19 02:28:04 2019
New Revision: 346363
URL: https://svnweb.freebsd.org/changeset/base/346363
Log:
powerpc/powernv: Make erasing before writes optional
If the OPAL flash driver supports writing without erase, it adds a
'no-erase' property to the flash device node. Honor that property and don't
bother erasing if it exists.
Modified:
head/sys/powerpc/powernv/opal_flash.c
Modified: head/sys/powerpc/powernv/opal_flash.c
==============================================================================
--- head/sys/powerpc/powernv/opal_flash.c Fri Apr 19 00:32:13 2019
(r346362)
+++ head/sys/powerpc/powernv/opal_flash.c Fri Apr 19 02:28:04 2019
(r346363)
@@ -69,6 +69,7 @@ struct opalflash_softc {
struct proc *sc_p;
struct bio_queue_head sc_bio_queue;
int sc_opal_id;
+ bool sc_erase; /* Erase is needed before write. */
};
#define OPALFLASH_LOCK(sc) mtx_lock(&(sc)->sc_mtx)
@@ -242,10 +243,12 @@ opalflash_write(struct opalflash_softc *sc, off_t off,
count % sc->sc_disk->d_stripesize != 0)
return (EIO);
- /* Erase the full block first, then write in page chunks. */
- rv = opalflash_erase(sc, off, count);
- if (rv != 0)
- return (rv);
+ if (sc->sc_erase) {
+ /* Erase the full block first, then write in page chunks. */
+ rv = opalflash_erase(sc, off, count);
+ if (rv != 0)
+ return (rv);
+ }
token = opal_alloc_async_token();
@@ -354,6 +357,9 @@ opalflash_attach(device_t dev)
device_printf(dev, "Cannot determine flash block size.\n");
return (ENXIO);
}
+
+ if (!OF_hasprop(node, "no-erase"))
+ sc->sc_erase = true;
OPALFLASH_LOCK_INIT(sc);
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