Author: cem
Date: Thu Jun 9 01:31:09 2016
New Revision: 301712
URL: https://svnweb.freebsd.org/changeset/base/301712
Log:
ioat(4): Add ddb "show ioat <unit>" debugger command
Sponsored by: EMC / Isilon Storage Division
Modified:
head/sys/dev/ioat/ioat.c
Modified: head/sys/dev/ioat/ioat.c
==============================================================================
--- head/sys/dev/ioat/ioat.c Thu Jun 9 01:28:44 2016 (r301711)
+++ head/sys/dev/ioat/ioat.c Thu Jun 9 01:31:09 2016 (r301712)
@@ -27,6 +27,8 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
+#include "opt_ddb.h"
+
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
@@ -48,6 +50,10 @@ __FBSDID("$FreeBSD$");
#include <machine/resource.h>
#include <machine/stdarg.h>
+#ifdef DDB
+#include <ddb/ddb.h>
+#endif
+
#include "ioat.h"
#include "ioat_hw.h"
#include "ioat_internal.h"
@@ -2090,3 +2096,96 @@ ioat_drain_locked(struct ioat_softc *ioa
while (ioat->refcnt > 0)
msleep(IOAT_REFLK, IOAT_REFLK, 0, "ioat_drain", 0);
}
+
+#ifdef DDB
+#define _db_show_lock(lo) LOCK_CLASS(lo)->lc_ddb_show(lo)
+#define db_show_lock(lk) _db_show_lock(&(lk)->lock_object)
+DB_SHOW_COMMAND(ioat, db_show_ioat)
+{
+ struct ioat_softc *sc;
+ unsigned idx;
+
+ if (!have_addr)
+ goto usage;
+ idx = (unsigned)addr;
+ if (addr >= ioat_channel_index)
+ goto usage;
+
+ sc = ioat_channel[idx];
+ db_printf("ioat softc at %p\n", sc);
+ if (sc == NULL)
+ return;
+
+ db_printf(" version: %d\n", sc->version);
+ db_printf(" chan_idx: %u\n", sc->chan_idx);
+ db_printf(" submit_lock: ");
+ db_show_lock(&sc->submit_lock);
+
+ db_printf(" capabilities: %b\n", (int)sc->capabilities,
+ IOAT_DMACAP_STR);
+ db_printf(" cached_intrdelay: %u\n", sc->cached_intrdelay);
+ db_printf(" *comp_update: 0x%jx\n", (uintmax_t)*sc->comp_update);
+
+ db_printf(" timer:\n");
+ db_printf(" c_time: %ju\n", (uintmax_t)sc->timer.c_time);
+ db_printf(" c_arg: %p\n", sc->timer.c_arg);
+ db_printf(" c_func: %p\n", sc->timer.c_func);
+ db_printf(" c_lock: %p\n", sc->timer.c_lock);
+ db_printf(" c_flags: 0x%x\n", (unsigned)sc->timer.c_flags);
+
+ db_printf(" quiescing: %d\n", (int)sc->quiescing);
+ db_printf(" destroying: %d\n", (int)sc->destroying);
+ db_printf(" is_resize_pending: %d\n", (int)sc->is_resize_pending);
+ db_printf(" is_completion_pending: %d\n",
(int)sc->is_completion_pending);
+ db_printf(" is_reset_pending: %d\n", (int)sc->is_reset_pending);
+ db_printf(" is_channel_running: %d\n", (int)sc->is_channel_running);
+ db_printf(" intrdelay_supported: %d\n", (int)sc->intrdelay_supported);
+
+ db_printf(" head: %u\n", sc->head);
+ db_printf(" tail: %u\n", sc->tail);
+ db_printf(" hw_head: %u\n", sc->hw_head);
+ db_printf(" ring_size_order: %u\n", sc->ring_size_order);
+ db_printf(" last_seen: 0x%lx\n", sc->last_seen);
+ db_printf(" ring: %p\n", sc->ring);
+
+ db_printf(" cleanup_lock: ");
+ db_show_lock(&sc->cleanup_lock);
+
+ db_printf(" refcnt: %u\n", sc->refcnt);
+#ifdef INVARIANTS
+ CTASSERT(IOAT_NUM_REF_KINDS == 2);
+ db_printf(" refkinds: [ENG=%u, DESCR=%u]\n", sc->refkinds[0],
+ sc->refkinds[1]);
+#endif
+ db_printf(" stats:\n");
+ db_printf(" interrupts: %lu\n", sc->stats.interrupts);
+ db_printf(" descriptors_processed: %lu\n",
sc->stats.descriptors_processed);
+ db_printf(" descriptors_error: %lu\n", sc->stats.descriptors_error);
+ db_printf(" descriptors_submitted: %lu\n",
sc->stats.descriptors_submitted);
+
+ db_printf(" channel_halts: %u\n", sc->stats.channel_halts);
+ db_printf(" last_halt_chanerr: %u\n", sc->stats.last_halt_chanerr);
+
+ if (db_pager_quit)
+ return;
+
+ db_printf(" hw status:\n");
+ db_printf(" status: 0x%lx\n", ioat_get_chansts(sc));
+ db_printf(" chanctrl: 0x%x\n",
+ (unsigned)ioat_read_2(sc, IOAT_CHANCTRL_OFFSET));
+ db_printf(" chancmd: 0x%x\n",
+ (unsigned)ioat_read_1(sc, IOAT_CHANCMD_OFFSET));
+ db_printf(" dmacount: 0x%x\n",
+ (unsigned)ioat_read_2(sc, IOAT_DMACOUNT_OFFSET));
+ db_printf(" chainaddr: 0x%lx\n",
+ ioat_read_double_4(sc, IOAT_CHAINADDR_OFFSET_LOW));
+ db_printf(" chancmp: 0x%lx\n",
+ ioat_read_double_4(sc, IOAT_CHANCMP_OFFSET_LOW));
+ db_printf(" chanerr: %b\n",
+ (int)ioat_read_4(sc, IOAT_CHANERR_OFFSET), IOAT_CHANERR_STR);
+ return;
+usage:
+ db_printf("usage: show ioat <0-%u>\n", ioat_channel_index);
+ return;
+}
+#endif /* DDB */
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