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-rw-r--r--SOURCES/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch89
1 files changed, 0 insertions, 89 deletions
diff --git a/SOURCES/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch b/SOURCES/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch
deleted file mode 100644
index 4f00ab7..0000000
--- a/SOURCES/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch
+++ /dev/null
@@ -1,89 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Robert Richter <rrichter@redhat.com>
-Date: Thu, 7 Jun 2018 22:59:33 -0400
-Subject: [PATCH] ahci: thunderx2: Fix for errata that affects stop engine
-
-Message-id: <1528412373-19128-3-git-send-email-rrichter@redhat.com>
-Patchwork-id: 220952
-O-Subject: [RHEL-8.0 BZ 1563590 v2 2/2] ahci: thunderx2: Fix for errata that affects stop engine
-Bugzilla: 1563590
-RH-Acked-by: Dean Nelson <dnelson@redhat.com>
-RH-Acked-by: Mark Langsdorf <mlangsdo@redhat.com>
-RH-Acked-by: Mark Salter <msalter@redhat.com>
-
-From: Jayachandran C <jnair@caviumnetworks.com>
-
-Apply workaround for this errata:
- Synopsis: Resetting PxCMD.ST may hang the SATA device
-
- Description: An internal ping-pong buffer state is not reset
- correctly for an PxCMD.ST=0 command for a SATA channel. This
- may cause the SATA interface to hang when a PxCMD.ST=0 command
- is received.
-
- Workaround: A SATA_BIU_CORE_ENABLE.sw_init_bsi must be asserted
- by the driver whenever the PxCMD.ST needs to be de-asserted. This
- will reset both the ports. So, it may not always work in a 2
- channel SATA system.
-
- Resolution: Fix in B0.
-
-Add the code to ahci_stop_engine() to do this. It is not easy to
-stop the other "port" since it is associated with a different AHCI
-interface. Please note that with this fix, SATA reset does not
-hang any more, but it can cause failures on the other interface
-if that is in active use.
-
-Unfortunately, we have nothing other the the CPU ID to check if the
-SATA block has this issue.
-
-RHEL-only:
-
-Both patches are in RHEL-7.6 also. Inclusion of the patches into RHEL-8
-was discussed. Since there are partners with Ax system configurations it
-was decided to carry them in RHEL8 too. See:
-
- https://bugzilla.redhat.com/show_bug.cgi?id=1563590#c1
-
-[v3 with new delays]
-Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
-
-Upstream Status: RHEL only
-Signed-off-by: Robert Richter <rrichter@redhat.com>
-Signed-off-by: Herton R. Krzesinski <herton@redhat.com>
----
- drivers/ata/libahci.c | 18 ++++++++++++++++++
- 1 file changed, 18 insertions(+)
-
-diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
-index ea5bf5f4cbed..71c55cae27ac 100644
---- a/drivers/ata/libahci.c
-+++ b/drivers/ata/libahci.c
-@@ -666,6 +666,24 @@ int ahci_stop_engine(struct ata_port *ap)
- tmp &= ~PORT_CMD_START;
- writel(tmp, port_mmio + PORT_CMD);
-
-+#ifdef CONFIG_ARM64
-+ /* Rev Ax of Cavium CN99XX needs a hack for port stop */
-+ if (dev_is_pci(ap->host->dev) &&
-+ to_pci_dev(ap->host->dev)->vendor == 0x14e4 &&
-+ to_pci_dev(ap->host->dev)->device == 0x9027 &&
-+ midr_is_cpu_model_range(read_cpuid_id(),
-+ MIDR_CPU_MODEL(ARM_CPU_IMP_BRCM, BRCM_CPU_PART_VULCAN),
-+ MIDR_CPU_VAR_REV(0, 0),
-+ MIDR_CPU_VAR_REV(0, MIDR_REVISION_MASK))) {
-+ tmp = readl(hpriv->mmio + 0x8000);
-+ udelay(100);
-+ writel(tmp | (1 << 26), hpriv->mmio + 0x8000);
-+ udelay(100);
-+ writel(tmp & ~(1 << 26), hpriv->mmio + 0x8000);
-+ dev_warn(ap->host->dev, "CN99XX SATA reset workaround applied\n");
-+ }
-+#endif
-+
- /* wait for engine to stop. This could be as long as 500 msec */
- tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
- PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
---
-2.28.0
-