diff options
author | Hari Bathini <hbathini@linux.ibm.com> | 2019-09-11 17:51:33 +0300 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-09-13 17:04:43 +0300 |
commit | a20a8fa42def548f46c7e0401a94f62b8e595883 (patch) | |
tree | 90ff7d518f38ca3ac795d73b81120f35c50ab53e /arch/powerpc/platforms/powernv/opal-fadump.c | |
parent | 2790d01d1e1d22735d848eec55668f7d44417e22 (diff) | |
download | linux-a20a8fa42def548f46c7e0401a94f62b8e595883.tar.xz |
powerpc/fadump: define OPAL register/un-register callback functions
Make OPAL calls to register and un-register with firmware for MPIPL.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821348482.5656.13646250851483648241.stgit@hbathini.in.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal-fadump.c')
-rw-r--r-- | arch/powerpc/platforms/powernv/opal-fadump.c | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c b/arch/powerpc/platforms/powernv/opal-fadump.c index 871a129c73d3..b53007e82190 100644 --- a/arch/powerpc/platforms/powernv/opal-fadump.c +++ b/arch/powerpc/platforms/powernv/opal-fadump.c @@ -21,6 +21,22 @@ static struct opal_fadump_mem_struct *opal_fdm; +static int opal_fadump_unregister(struct fw_dump *fadump_conf); + +static void opal_fadump_update_config(struct fw_dump *fadump_conf, + const struct opal_fadump_mem_struct *fdm) +{ + /* + * The destination address of the first boot memory region is the + * destination address of boot memory regions. + */ + fadump_conf->boot_mem_dest_addr = fdm->rgn[0].dest; + pr_debug("Destination address of boot memory regions: %#016llx\n", + fadump_conf->boot_mem_dest_addr); + + fadump_conf->fadumphdr_addr = fdm->fadumphdr_addr; +} + /* Initialize kernel metadata */ static void opal_fadump_init_metadata(struct opal_fadump_mem_struct *fdm) { @@ -50,6 +66,8 @@ static u64 opal_fadump_init_mem_struct(struct fw_dump *fadump_conf) opal_fdm->fadumphdr_addr = (opal_fdm->rgn[0].dest + fadump_conf->boot_memory_size); + opal_fadump_update_config(fadump_conf, opal_fdm); + return addr; } @@ -92,12 +110,69 @@ static int opal_fadump_setup_metadata(struct fw_dump *fadump_conf) static int opal_fadump_register(struct fw_dump *fadump_conf) { - return -EIO; + s64 rc = OPAL_PARAMETER; + int i, err = -EIO; + + for (i = 0; i < opal_fdm->region_cnt; i++) { + rc = opal_mpipl_update(OPAL_MPIPL_ADD_RANGE, + opal_fdm->rgn[i].src, + opal_fdm->rgn[i].dest, + opal_fdm->rgn[i].size); + if (rc != OPAL_SUCCESS) + break; + + opal_fdm->registered_regions++; + } + + switch (rc) { + case OPAL_SUCCESS: + pr_info("Registration is successful!\n"); + fadump_conf->dump_registered = 1; + err = 0; + break; + case OPAL_RESOURCE: + /* If MAX regions limit in f/w is hit, warn and proceed. */ + pr_warn("%d regions could not be registered for MPIPL as MAX limit is reached!\n", + (opal_fdm->region_cnt - opal_fdm->registered_regions)); + fadump_conf->dump_registered = 1; + err = 0; + break; + case OPAL_PARAMETER: + pr_err("Failed to register. Parameter Error(%lld).\n", rc); + break; + case OPAL_HARDWARE: + pr_err("Support not available.\n"); + fadump_conf->fadump_supported = 0; + fadump_conf->fadump_enabled = 0; + break; + default: + pr_err("Failed to register. Unknown Error(%lld).\n", rc); + break; + } + + /* + * If some regions were registered before OPAL_MPIPL_ADD_RANGE + * OPAL call failed, unregister all regions. + */ + if ((err < 0) && (opal_fdm->registered_regions > 0)) + opal_fadump_unregister(fadump_conf); + + return err; } static int opal_fadump_unregister(struct fw_dump *fadump_conf) { - return -EIO; + s64 rc; + + rc = opal_mpipl_update(OPAL_MPIPL_REMOVE_ALL, 0, 0, 0); + if (rc) { + pr_err("Failed to un-register - unexpected Error(%lld).\n", rc); + return -EIO; + } + + opal_fdm->registered_regions = 0; + fadump_conf->dump_registered = 0; + return 0; } static int opal_fadump_invalidate(struct fw_dump *fadump_conf) |