diff options
| author | jimharris <jimharris@FreeBSD.org> | 2015-07-27 15:37:02 +0000 |
|---|---|---|
| committer | jimharris <jimharris@FreeBSD.org> | 2015-07-27 15:37:02 +0000 |
| commit | bc6d158afc7845c103f6a499035f41effc1ba6ca (patch) | |
| tree | cd32d7a50e32135b33641ec3ad8674ec9c16bdb2 /sys | |
| parent | 6f14ca53828e5c526ab94fa3a51e468298f54b4a (diff) | |
| download | FreeBSD-src-bc6d158afc7845c103f6a499035f41effc1ba6ca.zip FreeBSD-src-bc6d158afc7845c103f6a499035f41effc1ba6ca.tar.gz | |
MFC r285816:
nvme: ensure csts.rdy bit is cleared before returning from nvme_ctrlr_disable
Sponsored by: Intel
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/nvme/nvme_ctrlr.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/sys/dev/nvme/nvme_ctrlr.c b/sys/dev/nvme/nvme_ctrlr.c index bbcd6cc..928d294 100644 --- a/sys/dev/nvme/nvme_ctrlr.c +++ b/sys/dev/nvme/nvme_ctrlr.c @@ -1,5 +1,5 @@ /*- - * Copyright (C) 2012-2014 Intel Corporation + * Copyright (C) 2012-2015 Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -207,7 +207,7 @@ nvme_ctrlr_fail_req_task(void *arg, int pending) } static int -nvme_ctrlr_wait_for_ready(struct nvme_controller *ctrlr) +nvme_ctrlr_wait_for_ready(struct nvme_controller *ctrlr, int desired_val) { int ms_waited; union cc_register cc; @@ -216,18 +216,19 @@ nvme_ctrlr_wait_for_ready(struct nvme_controller *ctrlr) cc.raw = nvme_mmio_read_4(ctrlr, cc); csts.raw = nvme_mmio_read_4(ctrlr, csts); - if (!cc.bits.en) { - nvme_printf(ctrlr, "%s called with cc.en = 0\n", __func__); + if (cc.bits.en != desired_val) { + nvme_printf(ctrlr, "%s called with desired_val = %d " + "but cc.en = %d\n", __func__, desired_val, cc.bits.en); return (ENXIO); } ms_waited = 0; - while (!csts.bits.rdy) { + while (csts.bits.rdy != desired_val) { DELAY(1000); if (ms_waited++ > ctrlr->ready_timeout_in_ms) { - nvme_printf(ctrlr, "controller did not become ready " - "within %d ms\n", ctrlr->ready_timeout_in_ms); + nvme_printf(ctrlr, "controller ready did not become %d " + "within %d ms\n", desired_val, ctrlr->ready_timeout_in_ms); return (ENXIO); } csts.raw = nvme_mmio_read_4(ctrlr, csts); @@ -246,11 +247,12 @@ nvme_ctrlr_disable(struct nvme_controller *ctrlr) csts.raw = nvme_mmio_read_4(ctrlr, csts); if (cc.bits.en == 1 && csts.bits.rdy == 0) - nvme_ctrlr_wait_for_ready(ctrlr); + nvme_ctrlr_wait_for_ready(ctrlr, 1); cc.bits.en = 0; nvme_mmio_write_4(ctrlr, cc, cc.raw); DELAY(5000); + nvme_ctrlr_wait_for_ready(ctrlr, 0); } static int @@ -267,7 +269,7 @@ nvme_ctrlr_enable(struct nvme_controller *ctrlr) if (csts.bits.rdy == 1) return (0); else - return (nvme_ctrlr_wait_for_ready(ctrlr)); + return (nvme_ctrlr_wait_for_ready(ctrlr, 1)); } nvme_mmio_write_8(ctrlr, asq, ctrlr->adminq.cmd_bus_addr); @@ -295,7 +297,7 @@ nvme_ctrlr_enable(struct nvme_controller *ctrlr) nvme_mmio_write_4(ctrlr, cc, cc.raw); DELAY(5000); - return (nvme_ctrlr_wait_for_ready(ctrlr)); + return (nvme_ctrlr_wait_for_ready(ctrlr, 1)); } int |
