diff options
Diffstat (limited to '0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch')
| -rw-r--r-- | 0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch b/0001-ahci-thunderx2-Fix-for-errata-that-affects-stop-engi.patch deleted file mode 100644 index 4f00ab7f3..000000000 --- a/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 - |