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cxgbe: Add a 'show t4 memdump' DDB command

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Reviewed by:	np
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D45187

(cherry picked from commit 1edf61f395d98a5abb7d6f38e5e64722b4ddf351)
This commit is contained in:
John Baldwin 2024-07-03 08:05:11 -07:00 committed by Navdeep Parhar
parent 42d8f6b759
commit e42a182bb7
1 changed files with 66 additions and 10 deletions
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76
sys/dev/cxgbe/t4_main.c
View file

@ -12939,30 +12939,26 @@ tweak_tunables(void)
#ifdef DDB
static void
t4_dump_tcb(struct adapter *sc, int tid)
t4_dump_mem(struct adapter *sc, u_int addr, u_int len)
{
uint32_t base, i, j, off, pf, reg, save, tcb_addr, win_pos;
uint32_t base, j, off, pf, reg, save, win_pos;
reg = PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_OFFSET, 2);
save = t4_read_reg(sc, reg);
base = sc->memwin[2].mw_base;
/* Dump TCB for the tid */
tcb_addr = t4_read_reg(sc, A_TP_CMM_TCB_BASE);
tcb_addr += tid * TCB_SIZE;
if (is_t4(sc)) {
pf = 0;
win_pos = tcb_addr & ~0xf; /* start must be 16B aligned */
win_pos = addr & ~0xf; /* start must be 16B aligned */
} else {
pf = V_PFNUM(sc->pf);
win_pos = tcb_addr & ~0x7f; /* start must be 128B aligned */
win_pos = addr & ~0x7f; /* start must be 128B aligned */
}
off = addr - win_pos;
t4_write_reg(sc, reg, win_pos | pf);
t4_read_reg(sc, reg);
off = tcb_addr - win_pos;
for (i = 0; i < 4; i++) {
while (len > 0 && !db_pager_quit) {
uint32_t buf[8];
for (j = 0; j < 8; j++, off += 4)
buf[j] = htonl(t4_read_reg(sc, base + off));
@ -12970,12 +12966,27 @@ t4_dump_tcb(struct adapter *sc, int tid)
db_printf("%08x %08x %08x %08x %08x %08x %08x %08x\n",
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
buf[7]);
if (len <= sizeof(buf))
len = 0;
else
len -= sizeof(buf);
}
t4_write_reg(sc, reg, save);
t4_read_reg(sc, reg);
}
static void
t4_dump_tcb(struct adapter *sc, int tid)
{
uint32_t tcb_addr;
/* Dump TCB for the tid */
tcb_addr = t4_read_reg(sc, A_TP_CMM_TCB_BASE);
tcb_addr += tid * TCB_SIZE;
t4_dump_mem(sc, tcb_addr, TCB_SIZE);
}
static void
t4_dump_devlog(struct adapter *sc)
{
@ -13107,6 +13118,51 @@ DB_TABLE_COMMAND_FLAGS(show_t4, tcb, db_show_t4tcb, CS_OWN)
t4_dump_tcb(device_get_softc(dev), tid);
}
DB_TABLE_COMMAND_FLAGS(show_t4, memdump, db_show_memdump, CS_OWN)
{
device_t dev;
int radix, t;
bool valid;
valid = false;
radix = db_radix;
db_radix = 10;
t = db_read_token();
if (t == tIDENT) {
dev = device_lookup_by_name(db_tok_string);
t = db_read_token();
if (t == tNUMBER) {
addr = db_tok_number;
t = db_read_token();
if (t == tNUMBER) {
count = db_tok_number;
valid = true;
}
}
}
db_radix = radix;
db_skip_to_eol();
if (!valid) {
db_printf("usage: show t4 memdump <nexus> <addr> <len>\n");
return;
}
if (dev == NULL) {
db_printf("device not found\n");
return;
}
if (addr < 0) {
db_printf("invalid address\n");
return;
}
if (count <= 0) {
db_printf("invalid length\n");
return;
}
t4_dump_mem(device_get_softc(dev), addr, count);
}
#endif
static eventhandler_tag vxlan_start_evtag;