[src/trunk]: src/sys/dev/pci/qat Workaround for Atom C2000 series (Rangeley) ...

[knakahara <knakahara%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/85c7d2e001d5
branches:  trunk
changeset: 366376:85c7d2e001d5
user:      knakahara <knakahara%NetBSD.org@localhost>
date:      Tue May 24 08:35:47 2022 +0000

description:
Workaround for Atom C2000 series (Rangeley) qat, ok'ed by hikaru@n.o.

C2000 qat has two engines, however it doesn't have arbiter.
If we enable both engines, qat interrupts twice wrongly (and second
interrupt notice invalid data).  So, we enable only one engine.

diffstat:

 sys/dev/pci/qat/qat_c2xxx.c |  13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diffs (35 lines):

diff -r 3c19a12ab764 -r 85c7d2e001d5 sys/dev/pci/qat/qat_c2xxx.c
--- a/sys/dev/pci/qat/qat_c2xxx.c       Tue May 24 06:27:59 2022 +0000
+++ b/sys/dev/pci/qat/qat_c2xxx.c       Tue May 24 08:35:47 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: qat_c2xxx.c,v 1.1 2019/11/20 09:37:46 hikaru Exp $     */
+/*     $NetBSD: qat_c2xxx.c,v 1.2 2022/05/24 08:35:47 knakahara Exp $  */
 
 /*
  * Copyright (c) 2019 Internet Initiative Japan, Inc.
@@ -57,7 +57,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: qat_c2xxx.c,v 1.1 2019/11/20 09:37:46 hikaru Exp $");
+__KERNEL_RCSID(0, "$NetBSD: qat_c2xxx.c,v 1.2 2022/05/24 08:35:47 knakahara Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -171,7 +171,16 @@
        .qhw_num_ap_banks = ETR_MAX_AP_BANKS_C2XXX,
        .qhw_num_rings_per_bank = ETR_MAX_RINGS_PER_BANK,
        .qhw_num_accel = MAX_ACCEL_C2XXX,
+#if 0
        .qhw_num_engines = MAX_AE_C2XXX,
+#else
+       /*
+        * Workaround:
+        * C2xxx qat has two engines, however it doesn't have arbiter which
+        * C3xxx qat has.  So, we don't use secondary engine for C2xxx qat.
+        */
+       .qhw_num_engines = 1,
+#endif
        .qhw_tx_rx_gap = ETR_TX_RX_GAP_C2XXX,
        .qhw_tx_rings_mask = ETR_TX_RINGS_MASK_C2XXX,
        .qhw_msix_ae_vec_gap = MSIX_AE_VEC_GAP_C2XXX,