f5f2d263454d943a366844932bdb677530ba733bFred Herard * CDDL HEADER START
f5f2d263454d943a366844932bdb677530ba733bFred Herard * The contents of this file are subject to the terms of the
f5f2d263454d943a366844932bdb677530ba733bFred Herard * Common Development and Distribution License (the "License").
f5f2d263454d943a366844932bdb677530ba733bFred Herard * You may not use this file except in compliance with the License.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
f5f2d263454d943a366844932bdb677530ba733bFred Herard * See the License for the specific language governing permissions
f5f2d263454d943a366844932bdb677530ba733bFred Herard * and limitations under the License.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * When distributing Covered Code, include this CDDL HEADER in each
f5f2d263454d943a366844932bdb677530ba733bFred Herard * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * If applicable, add the following below this CDDL HEADER, with the
f5f2d263454d943a366844932bdb677530ba733bFred Herard * fields enclosed by brackets "[]" replaced with your own identifying
f5f2d263454d943a366844932bdb677530ba733bFred Herard * information: Portions Copyright [yyyy] [name of copyright owner]
f5f2d263454d943a366844932bdb677530ba733bFred Herard * CDDL HEADER END
f5f2d263454d943a366844932bdb677530ba733bFred Herard * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * Use is subject to license terms.
2ac302890e472bf0c11db192dd18f12ded6043f6Marcel Telka * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * SATA trace debug walker/dcmd code
f5f2d263454d943a366844932bdb677530ba733bFred Herard * Initialize the sata_trace_dmsg_t walker by either using the given starting
f5f2d263454d943a366844932bdb677530ba733bFred Herard * address, or reading the value of the kernel's sata_debug_rbuf pointer.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * We also allocate a sata_trace_dmsg_t for storage, and save this using the
f5f2d263454d943a366844932bdb677530ba733bFred Herard * walk_data pointer.
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_readvar(&rbuf_addr, "sata_debug_rbuf") == -1) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_vread(&rbuf, sizeof (sata_trace_rbuf_t), rbuf_addr)
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_warn("failed to read sata_trace_rbuf_t at %p",
f5f2d263454d943a366844932bdb677530ba733bFred Herard wsp->walk_addr = (uintptr_t)(sata_trace_dmsg_t *)rbuf.dmsgh;
f5f2d263454d943a366844932bdb677530ba733bFred Herard * Save ptr to head of ring buffer to prevent looping.
f5f2d263454d943a366844932bdb677530ba733bFred Herard wsp->walk_data = mdb_alloc(sizeof (sata_trace_dmsg_t), UM_SLEEP);
f5f2d263454d943a366844932bdb677530ba733bFred Herard * At each step, read a sata_trace_dmsg_t into our private storage, and then
f5f2d263454d943a366844932bdb677530ba733bFred Herard * invoke the callback function. We terminate when we reach a NULL next
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_vread(wsp->walk_data, sizeof (sata_trace_dmsg_t),
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_warn("failed to read sata_trace_dmsg_t at %p",
f5f2d263454d943a366844932bdb677530ba733bFred Herard status = wsp->walk_callback(wsp->walk_addr, wsp->walk_data,
f5f2d263454d943a366844932bdb677530ba733bFred Herard (uintptr_t)(((sata_trace_dmsg_t *)wsp->walk_data)->next);
f5f2d263454d943a366844932bdb677530ba733bFred Herard * If we've looped then we're done.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * The walker's fini function is invoked at the end of each walk. Since we
f5f2d263454d943a366844932bdb677530ba733bFred Herard * dynamically allocated a sata_trace_dmsg_t in sata_dmsg_walk_i, we must
f5f2d263454d943a366844932bdb677530ba733bFred Herard * free it now.
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_free(wsp->walk_data, sizeof (sata_trace_dmsg_t));
f5f2d263454d943a366844932bdb677530ba733bFred Herard * This routine is used by the sata_dmsg_dump dcmd to dump content of
f5f2d263454d943a366844932bdb677530ba733bFred Herard * SATA trace ring buffer.
f5f2d263454d943a366844932bdb677530ba733bFred Herardsata_dmsg_dump(sata_trace_dmsg_t *addr, int print_pathname, uint_t *printed)
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_vread(&dmsg, sizeof (dmsg), (uintptr_t)addr) !=
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_warn("failed to read message pointer in kernel");
f5f2d263454d943a366844932bdb677530ba733bFred Herard "[%Y:%03d:%03d:%03d] : %s",
f5f2d263454d943a366844932bdb677530ba733bFred Herard "[%Y:%03d:%03d:%03d] %s%d: %s",
f5f2d263454d943a366844932bdb677530ba733bFred Herard "[%Y:%03d:%03d:%03d] : %s",
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (((addr = dmsg.next) == NULL) || (dmsg.next == dmsgh)) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard * 1. Process flag passed to sata_dmsg_dump dcmd.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * 2. Obtain SATA trace ring buffer pointer.
f5f2d263454d943a366844932bdb677530ba733bFred Herard * 3. Pass SATA trace ring buffer pointer to sata_dmsg_dump()
f5f2d263454d943a366844932bdb677530ba733bFred Herard * to dump content of SATA trace ring buffer.
f5f2d263454d943a366844932bdb677530ba733bFred Herardsata_rbuf_dump(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
f5f2d263454d943a366844932bdb677530ba733bFred Herard uint_t printed = 0; /* have we printed anything? */
f5f2d263454d943a366844932bdb677530ba733bFred Herard 'a', MDB_OPT_SETBITS, TRUE, &print_pathname) != argc) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard * If ring buffer address not provided try to obtain
f5f2d263454d943a366844932bdb677530ba733bFred Herard * it using sata_debug_rbuf global.
f5f2d263454d943a366844932bdb677530ba733bFred Herard if ((addr == NULL) || !(flags & DCMD_ADDRSPEC)) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_readvar(&addr, "sata_debug_rbuf") == -1) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard if (mdb_vread(&rbuf, sizeof (rbuf), addr) != sizeof (rbuf)) {
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_warn("Failed to read ring buffer in kernel.");
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_printf("The sata trace ring buffer is empty.\n");
f5f2d263454d943a366844932bdb677530ba733bFred Herard rval = sata_dmsg_dump((sata_trace_dmsg_t *)rbuf.dmsgh,
f5f2d263454d943a366844932bdb677530ba733bFred Herard mdb_warn("Failed to read sata trace ring buffer.");
f5f2d263454d943a366844932bdb677530ba733bFred Herard * MDB module linkage information:
f5f2d263454d943a366844932bdb677530ba733bFred Herard * We declare a list of structures describing our dcmds, a list of structures
f5f2d263454d943a366844932bdb677530ba733bFred Herard * describing our walkers, and a function named _mdb_init to return a pointer
f5f2d263454d943a366844932bdb677530ba733bFred Herard * to our module information.
f5f2d263454d943a366844932bdb677530ba733bFred Herard { "sata_dmsg_dump", "[-a]", "Dump sata trace debug messages",
f5f2d263454d943a366844932bdb677530ba733bFred Herard { "sata_dmsg",
f5f2d263454d943a366844932bdb677530ba733bFred Herard "walk ring buffer containing sata trace debug messages",