[PATCH 3/3] thunderbolt: Support 1st gen Light Ridge controller
From: Lukas Wunner
Date: Sun Mar 20 2016 - 08:58:07 EST
Built into:
iMac12,1 2011 21.5"
iMac12,2 2011 27"
Macmini5,1 2011 i5 2.3 GHz
Macmini5,2 2011 i5 2.5 GHz
Macmini5,3 2011 i7 2.0 GHz
MacBookPro8,1 2011 13"
MacBookPro8,2 2011 15"
MacBookPro8,3 2011 17"
MacBookPro9,1 2012 15"
MacBookPro9,2 2012 13"
Light Ridge (CV82524) was the very first copper Thunderbolt controller,
introduced 2010 alongside its fiber-optic cousin Light Peak (CVL2510).
Consequently the chip suffers from some teething troubles:
MSI is broken for hotplug signaling on the downstream bridges: The chip
just never sends an interrupt. It requests 32 MSIs for each of its six
bridges and the pcieport driver only allocates one per bridge. However
I've verified that even if 32 MSIs are allocated there's no interrupt
on hotplug. The only option is thus to disable MSI, which is also what
OS X does. Apparently all Thunderbolt chips up to revision 1 of Cactus
Ridge 4C are plagued by this issue so quirk those as well.
The chip supports a maximum hop_count of 32, unlike its successors
which support only 12. Fixup ring_interrupt_active() to cope with
values >= 32.
Another peculiarity is that the chip supports a maximum of 13 ports
whereas its successors support 12. However the additional port (#5)
seems to be unusable as reading its TB_CFG_PORT config space results
in TB_CFG_ERROR_INVALID_CONFIG_SPACE. Add a quirk to mark the port
disabled on the root switch, assuming that's necessary on all Macs
using this chip.
Cc: Andreas Noever <andreas.noever@xxxxxxxxx>
Tested-by: Lukas Wunner <lukas@xxxxxxxxx> [MacBookPro9,1]
Tested-by: William Brown <william@xxxxxxxxxxxxxxxx> [MacBookPro8,2]
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
drivers/pci/quirks.c | 29 ++++++++++++++++++++++++++++-
drivers/thunderbolt/eeprom.c | 5 +++++
drivers/thunderbolt/nhi.c | 11 +++++++++--
drivers/thunderbolt/switch.c | 3 ++-
4 files changed, 44 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index b584ddf..b1ff270 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3185,6 +3185,29 @@ static void quirk_no_pm_reset(struct pci_dev *dev)
DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, PCI_ANY_ID,
PCI_CLASS_DISPLAY_VGA, 8, quirk_no_pm_reset);
+/*
+ * Thunderbolt controllers with broken MSI hotplug signaling:
+ * Entire 1st generation (Light Ridge, Eagle Ridge, Light Peak) and part
+ * of the 2nd generation (Cactus Ridge 4C up to revision 1, Port Ridge).
+ */
+static void quirk_thunderbolt_hotplug_msi(struct pci_dev *pdev)
+{
+ if (pdev->is_hotplug_bridge &&
+ (pdev->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C ||
+ pdev->revision <= 1))
+ pdev->no_msi = 1;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
+ quirk_thunderbolt_hotplug_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EAGLE_RIDGE,
+ quirk_thunderbolt_hotplug_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_PEAK,
+ quirk_thunderbolt_hotplug_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
+ quirk_thunderbolt_hotplug_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
+ quirk_thunderbolt_hotplug_msi);
+
#ifdef CONFIG_ACPI
/*
* Apple: Shutdown Cactus Ridge Thunderbolt controller.
@@ -3267,7 +3290,8 @@ static void quirk_apple_wait_for_thunderbolt(struct pci_dev *dev)
if (!nhi)
goto out;
if (nhi->vendor != PCI_VENDOR_ID_INTEL
- || (nhi->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C &&
+ || (nhi->device != PCI_DEVICE_ID_INTEL_LIGHT_RIDGE &&
+ nhi->device != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C &&
nhi->device != PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI)
|| nhi->subsystem_vendor != 0x2222
|| nhi->subsystem_device != 0x1111)
@@ -3279,6 +3303,9 @@ out:
pci_dev_put(sibling);
}
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
+ quirk_apple_wait_for_thunderbolt);
+DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
quirk_apple_wait_for_thunderbolt);
DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_INTEL,
diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c
index 47e56e8..0c052e2 100644
--- a/drivers/thunderbolt/eeprom.c
+++ b/drivers/thunderbolt/eeprom.c
@@ -388,6 +388,11 @@ int tb_drom_read(struct tb_switch *sw)
sw->ports[4].link_nr = 1;
sw->ports[3].dual_link_port = &sw->ports[4];
sw->ports[4].dual_link_port = &sw->ports[3];
+
+ /* Port 5 is inaccessible on this gen 1 controller */
+ if (sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE)
+ sw->ports[5].disabled = true;
+
return 0;
}
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 36be23b..9c15344 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -37,7 +37,8 @@ static int ring_interrupt_index(struct tb_ring *ring)
*/
static void ring_interrupt_active(struct tb_ring *ring, bool active)
{
- int reg = REG_RING_INTERRUPT_BASE + ring_interrupt_index(ring) / 32;
+ int reg = REG_RING_INTERRUPT_BASE +
+ ring_interrupt_index(ring) / 32 * 4;
int bit = ring_interrupt_index(ring) & 31;
int mask = 1 << bit;
u32 old, new;
@@ -564,7 +565,7 @@ static int nhi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
/* cannot fail - table is allocated bin pcim_iomap_regions */
nhi->iobase = pcim_iomap_table(pdev)[0];
nhi->hop_count = ioread32(nhi->iobase + REG_HOP_COUNT) & 0x3ff;
- if (nhi->hop_count != 12)
+ if (nhi->hop_count != 12 && nhi->hop_count != 32)
dev_warn(&pdev->dev, "unexpected hop count: %d\n",
nhi->hop_count);
INIT_WORK(&nhi->interrupt_work, nhi_interrupt_work);
@@ -638,6 +639,12 @@ static struct pci_device_id nhi_ids[] = {
{
.class = PCI_CLASS_SYSTEM_OTHER << 8, .class_mask = ~0,
.vendor = PCI_VENDOR_ID_INTEL,
+ .device = PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
+ .subvendor = 0x2222, .subdevice = 0x1111,
+ },
+ {
+ .class = PCI_CLASS_SYSTEM_OTHER << 8, .class_mask = ~0,
+ .vendor = PCI_VENDOR_ID_INTEL,
.device = PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
.subvendor = 0x2222, .subdevice = 0x1111,
},
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index c6270f0..1e116f5 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -370,7 +370,8 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route)
tb_sw_warn(sw, "unknown switch vendor id %#x\n",
sw->config.vendor_id);
- if (sw->config.device_id != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C &&
+ if (sw->config.device_id != PCI_DEVICE_ID_INTEL_LIGHT_RIDGE &&
+ sw->config.device_id != PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C &&
sw->config.device_id != PCI_DEVICE_ID_INTEL_PORT_RIDGE)
tb_sw_warn(sw, "unsupported switch device id %#x\n",
sw->config.device_id);
--
2.8.0.rc3