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Date: Wed, 17 Oct 2018 13:28:55 -0700
From: Joe M <joe9mail@gmail.com>
To: 9front@9front.org
Subject: Avoid treating the SB7x0/SB8x0/SB9x0 SATA Controller as an SB600
Message-ID: <20181017202855.GA15127@master>
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X-Bullshit: secure converged rails realtime-java SSL over AJAX method element-oriented NoSQL manager 

Hello,

This patch avoids the SB600 errata fix when dealing with the later
SATA controllers.

0.17.0:	disk 01.06.01 1002/4391  11 0:0000b001 16 1:0000a001 16 2:00009001 16 3:00008001 16 4:00007001 16 5:fdcffc00 1024
	Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]

# HG changeset patch
# User joe
# Date 1539807714 25200
#      Wed Oct 17 13:21:54 2018 -0700
# Node ID 855645ff928b86129a314a0e7380cebe74eb4c14
# Parent  4c1c90cb3a47f8cc9414f6165b4bc957c07b0b51
recognise SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode] as an AHCI controller

it does not need the 255 max packets errata fix too

diff -r 4c1c90cb3a47 -r 855645ff928b sys/src/9/pc/sdiahci.c
--- a/sys/src/9/pc/sdiahci.c	Tue Oct 16 12:53:55 2018 -0700
+++ b/sys/src/9/pc/sdiahci.c	Wed Oct 17 13:21:54 2018 -0700
@@ -2088,8 +2088,12 @@
 		break;
 	case 0x1002:
 		if(p->ccru == 1 || p->ccrp != 1)
-		if(p->did == 0x4380 || p->did == 0x4390)
-			sbsetupahci(p);
+			if(p->did == 0x4380 || p->did == 0x4390)
+				sbsetupahci(p);
+		if(p->did == 0x4391 || p->did == 0x4394) {
+			type = Tahci;
+			break;
+		}
 		type = Tsb600;
 		break;
 	case 0x1106:

Thanks