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[PATCH v3 5/8] hw/ide/ahci: PxSACT and PxCI is cleared when PxCMD.ST is
From: |
Niklas Cassel |
Subject: |
[PATCH v3 5/8] hw/ide/ahci: PxSACT and PxCI is cleared when PxCMD.ST is cleared |
Date: |
Fri, 9 Jun 2023 16:08:41 +0200 |
From: Niklas Cassel <niklas.cassel@wdc.com>
According to AHCI 1.3.1 definition of PxSACT:
This field is cleared when PxCMD.ST is written from a '1' to a '0' by
software. This field is not cleared by a COMRESET or a software reset.
According to AHCI 1.3.1 definition of PxCI:
This field is also cleared when PxCMD.ST is written from a '1' to a '0'
by software.
Clearing PxCMD.ST is part of the error recovery procedure, see
AHCI 1.3.1, section "6.2 Error Recovery".
If we don't clear PxCI on error recovery, the previous command will
incorrectly still be marked as pending after error recovery.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
---
hw/ide/ahci.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 3deaf01add..a31e6fa65e 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -329,6 +329,11 @@ static void ahci_port_write(AHCIState *s, int port, int
offset, uint32_t val)
ahci_check_irq(s);
break;
case AHCI_PORT_REG_CMD:
+ if ((pr->cmd & PORT_CMD_START) && !(val & PORT_CMD_START)) {
+ pr->scr_act = 0;
+ pr->cmd_issue = 0;
+ }
+
/* Block any Read-only fields from being set;
* including LIST_ON and FIS_ON.
* The spec requires to set ICC bits to zero after the ICC change
--
2.40.1
- [PATCH v3 0/8] misc AHCI cleanups, Niklas Cassel, 2023/06/09
- [PATCH v3 1/8] hw/ide/ahci: remove stray backslash, Niklas Cassel, 2023/06/09
- [PATCH v3 2/8] hw/ide/core: set ERR_STAT in unsupported command completion, Niklas Cassel, 2023/06/09
- [PATCH v3 3/8] hw/ide/ahci: write D2H FIS when processing NCQ command, Niklas Cassel, 2023/06/09
- [PATCH v3 5/8] hw/ide/ahci: PxSACT and PxCI is cleared when PxCMD.ST is cleared,
Niklas Cassel <=
- [PATCH v3 4/8] hw/ide/ahci: simplify and document PxCI handling, Niklas Cassel, 2023/06/09
- [PATCH v3 7/8] hw/ide/ahci: fix ahci_write_fis_sdb(), Niklas Cassel, 2023/06/09
- [PATCH v3 6/8] hw/ide/ahci: PxCI should not get cleared when ERR_STAT is set, Niklas Cassel, 2023/06/09
- [PATCH v3 8/8] hw/ide/ahci: fix broken SError handling, Niklas Cassel, 2023/06/09