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Mario Limonciello

2022-Feb-10 22:43 UTC

[Nouveau] [PATCH v2 0/9] Overhaul is_thunderbolt

Various drivers in the kernel use `is_thunderbolt` or
`pci_is_thunderbolt_attached` to designate behaving differently
from a device that is internally in the machine. This relies upon checks
for a specific capability only set on Intel controllers.

Non-Intel USB4 designs should also match this designation so that they
can be treated the same regardless of the host they're connected to.

As part of adding the generic USB4 controller code, it was realized that
`is_thunderbolt` and `pcie_is_thunderbolt_attached` have been overloaded.

Instead migrate to using removable attribute from device core.

Changes from v1->v2:
 - Add Alex's tag to first patch
 - Move lack of command completion into a quirk (Lukas)
 - Drop `is_thunderbolt` attribute and `pci_is_thunderbolt_attached` and
   use device core removable attribute instead
 - Adjust all consumers of old attribute to use removable

Mario Limonciello (9):
  thunderbolt: move definition of PCI_CLASS_SERIAL_USB_USB4
  PCI: Move `is_thunderbolt` check for lack of command completed to a
    quirk
  PCI: drop `is_thunderbolt` attribute
  PCI: mark USB4 devices as removable
  drm/amd: drop the use of `pci_is_thunderbolt_attached`
  drm/nouveau: drop the use of `pci_is_thunderbolt_attached`
  drm/radeon: drop the use of `pci_is_thunderbolt_attached`
  platform/x86: amd-gmux: drop the use of `pci_is_thunderbolt_attached`
  PCI: drop `pci_is_thunderbolt_attached`

 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c  |  2 +-
 drivers/gpu/drm/nouveau/nouveau_vga.c   |  4 ++--
 drivers/gpu/drm/radeon/radeon_device.c  |  4 ++--
 drivers/gpu/drm/radeon/radeon_kms.c     |  2 +-
 drivers/pci/hotplug/pciehp_hpc.c        |  6 +-----
 drivers/pci/pci.c                       |  2 +-
 drivers/pci/probe.c                     | 21 ++++++++-------------
 drivers/pci/quirks.c                    | 17 +++++++++++++++++
 drivers/platform/x86/apple-gmux.c       |  2 +-
 drivers/thunderbolt/nhi.h               |  2 --
 include/linux/pci.h                     | 25 ++-----------------------
 include/linux/pci_ids.h                 |  1 +
 13 files changed, 38 insertions(+), 52 deletions(-)

-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 1/9] thunderbolt: move definition of PCI_CLASS_SERIAL_USB_USB4

This PCI class definition of the USB4 device is currently located only in
the thunderbolt driver.

It will be needed by a few other drivers for upcoming changes. Move it into
the common include file.

Acked-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/thunderbolt/nhi.h | 2 --
 include/linux/pci_ids.h   | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/nhi.h b/drivers/thunderbolt/nhi.h
index 69083aab2736..79e980b51f94 100644
--- a/drivers/thunderbolt/nhi.h
+++ b/drivers/thunderbolt/nhi.h
@@ -81,6 +81,4 @@ extern const struct tb_nhi_ops icl_nhi_ops;
 #define PCI_DEVICE_ID_INTEL_TGL_H_NHI0			0x9a1f
 #define PCI_DEVICE_ID_INTEL_TGL_H_NHI1			0x9a21
 
-#define PCI_CLASS_SERIAL_USB_USB4			0x0c0340
-
 #endif
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index aad54c666407..61b161d914f0 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -116,6 +116,7 @@
 #define PCI_CLASS_SERIAL_USB_OHCI	0x0c0310
 #define PCI_CLASS_SERIAL_USB_EHCI	0x0c0320
 #define PCI_CLASS_SERIAL_USB_XHCI	0x0c0330
+#define PCI_CLASS_SERIAL_USB_USB4	0x0c0340
 #define PCI_CLASS_SERIAL_USB_DEVICE	0x0c03fe
 #define PCI_CLASS_SERIAL_FIBER		0x0c04
 #define PCI_CLASS_SERIAL_SMBUS		0x0c05
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 2/9] PCI: Move `is_thunderbolt` check for lack of command completed to a quirk

The `is_thunderbolt` check is currently used to indicate the lack of
command completed support for a number of older Thunderbolt devices.

This however is heavy handed and should have been done via a quirk.  Move
the affected devices outlined in commit 493fb50e958c ("PCI: pciehp: Assume
NoCompl+ for Thunderbolt ports") into pci quirks.

Suggested-by: Lukas Wunner <lukas at wunner.de>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/pci/hotplug/pciehp_hpc.c |  6 +-----
 drivers/pci/quirks.c             | 17 +++++++++++++++++
 include/linux/pci.h              |  2 ++
 3 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 1c1ebf3dad43..e4c42b24aba8 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -996,11 +996,7 @@ struct controller *pcie_init(struct pcie_device *dev)
 	if (pdev->hotplug_user_indicators)
 		slot_cap &= ~(PCI_EXP_SLTCAP_AIP | PCI_EXP_SLTCAP_PIP);
 
-	/*
-	 * We assume no Thunderbolt controllers support Command Complete events,
-	 * but some controllers falsely claim they do.
-	 */
-	if (pdev->is_thunderbolt)
+	if (pdev->no_cmd_complete)
 		slot_cap |= PCI_EXP_SLTCAP_NCCS;
 
 	ctrl->slot_cap = slot_cap;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d2dd6a6cda60..6d3c88edde00 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3675,6 +3675,23 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
 			quirk_thunderbolt_hotplug_msi);
 
+static void quirk_thunderbolt_command_completed(struct pci_dev *pdev)
+{
+	pdev->no_cmd_complete = 1;
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
+			quirk_thunderbolt_command_completed);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EAGLE_RIDGE,
+			quirk_thunderbolt_command_completed);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_PEAK,
+			quirk_thunderbolt_command_completed);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
+			quirk_thunderbolt_command_completed);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C,
+			quirk_thunderbolt_command_completed);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
+			quirk_thunderbolt_command_completed);
+
 #ifdef CONFIG_ACPI
 /*
  * Apple: Shutdown Cactus Ridge Thunderbolt controller.
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8253a5413d7c..1e5b769e42fc 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -443,6 +443,8 @@ struct pci_dev {
 	unsigned int	is_hotplug_bridge:1;
 	unsigned int	shpc_managed:1;		/* SHPC owned by shpchp */
 	unsigned int	is_thunderbolt:1;	/* Thunderbolt controller */
+	unsigned int	no_cmd_complete:1;	/* Lies about command completed events */
+
 	/*
 	 * Devices marked being untrusted are the ones that can potentially
 	 * execute DMA attacks and similar. They are typically connected
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 3/9] PCI: drop `is_thunderbolt` attribute

The `is_thunderbolt` attribute is currently a dumping ground for a
variety of things.

Instead use the driver core removable attribute to indicate the
detail a device is attached to a thunderbolt or USB4 chain.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/pci/pci.c                 |  2 +-
 drivers/pci/probe.c               | 20 +++++++-------------
 drivers/platform/x86/apple-gmux.c |  2 +-
 include/linux/pci.h               |  5 ++---
 4 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 9ecce435fb3f..1264984d5e6d 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2955,7 +2955,7 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
 			return true;
 
 		/* Even the oldest 2010 Thunderbolt controller supports D3. */
-		if (bridge->is_thunderbolt)
+		if (dev_is_removable(&bridge->dev))
 			return true;
 
 		/* Platform might know better if the bridge supports D3 */
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 17a969942d37..e41656cdd8f0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1577,16 +1577,6 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev)
 		pdev->is_hotplug_bridge = 1;
 }
 
-static void set_pcie_thunderbolt(struct pci_dev *dev)
-{
-	u16 vsec;
-
-	/* Is the device part of a Thunderbolt controller? */
-	vsec = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL,
PCI_VSEC_ID_INTEL_TBT);
-	if (vsec)
-		dev->is_thunderbolt = 1;
-}
-
 static void set_pcie_untrusted(struct pci_dev *dev)
 {
 	struct pci_dev *parent;
@@ -1603,6 +1593,10 @@ static void set_pcie_untrusted(struct pci_dev *dev)
 static void pci_set_removable(struct pci_dev *dev)
 {
 	struct pci_dev *parent = pci_upstream_bridge(dev);
+	u16 vsec;
+
+	/* Is the device a Thunderbolt controller? */
+	vsec = pci_find_vsec_capability(dev, PCI_VENDOR_ID_INTEL,
PCI_VSEC_ID_INTEL_TBT);
 
 	/*
 	 * We (only) consider everything downstream from an external_facing
@@ -1615,8 +1609,9 @@ static void pci_set_removable(struct pci_dev *dev)
 	 * accessible to user / may not be removed by end user, and thus not
 	 * exposed as "removable" to userspace.
 	 */
-	if (parent &&
-	    (parent->external_facing || dev_is_removable(&parent->dev)))
+	if (vsec ||
+	    (parent &&
+	    (parent->external_facing || dev_is_removable(&parent->dev))))
 		dev_set_removable(&dev->dev, DEVICE_REMOVABLE);
 }
 
@@ -1860,7 +1855,6 @@ int pci_setup_device(struct pci_dev *dev)
 	dev->cfg_size = pci_cfg_space_size(dev);
 
 	/* Need to have dev->cfg_size ready */
-	set_pcie_thunderbolt(dev);
 
 	set_pcie_untrusted(dev);
 
diff --git a/drivers/platform/x86/apple-gmux.c
b/drivers/platform/x86/apple-gmux.c
index 57553f9b4d1d..04232fbc7d56 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -596,7 +596,7 @@ static int gmux_resume(struct device *dev)
 
 static int is_thunderbolt(struct device *dev, void *data)
 {
-	return to_pci_dev(dev)->is_thunderbolt;
+	return pci_is_thunderbolt_attached(to_pci_dev(dev));
 }
 
 static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 1e5b769e42fc..d9719eb14654 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -442,7 +442,6 @@ struct pci_dev {
 	unsigned int	is_virtfn:1;
 	unsigned int	is_hotplug_bridge:1;
 	unsigned int	shpc_managed:1;		/* SHPC owned by shpchp */
-	unsigned int	is_thunderbolt:1;	/* Thunderbolt controller */
 	unsigned int	no_cmd_complete:1;	/* Lies about command completed events */
 
 	/*
@@ -2447,11 +2446,11 @@ static inline bool pci_is_thunderbolt_attached(struct
pci_dev *pdev)
 {
 	struct pci_dev *parent = pdev;
 
-	if (pdev->is_thunderbolt)
+	if (dev_is_removable(&pdev->dev))
 		return true;
 
 	while ((parent = pci_upstream_bridge(parent)))
-		if (parent->is_thunderbolt)
+		if (dev_is_removable(&parent->dev))
 			return true;
 
 	return false;
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 4/9] PCI: mark USB4 devices as removable

USB4 class devices are also removable like Intel Thunderbolt devices.

Drivers of downstream devices use this information to declare functional
differences in how the drivers perform by knowing that they are connected
to an upstream TBT/USB4 port.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/pci/probe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e41656cdd8f0..73673a83eb5e 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1610,6 +1610,7 @@ static void pci_set_removable(struct pci_dev *dev)
 	 * exposed as "removable" to userspace.
 	 */
 	if (vsec ||
+	    dev->class == PCI_CLASS_SERIAL_USB_USB4 ||
 	    (parent &&
 	    (parent->external_facing || dev_is_removable(&parent->dev))))
 		dev_set_removable(&dev->dev, DEVICE_REMOVABLE);
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 5/9] drm/amd: drop the use of `pci_is_thunderbolt_attached`

Currently `pci_is_thunderbolt_attached` is used to indicate a device
is connected externally.

The PCI core now marks such devices as removable and downstream drivers
can use this instead.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 2 +-
 drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 1ebb91db2274..6dbf5753b5be 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -161,7 +161,7 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev,
unsigned long flags)
 	    (amdgpu_is_atpx_hybrid() ||
 	     amdgpu_has_atpx_dgpu_power_cntl()) &&
 	    ((flags & AMD_IS_APU) == 0) &&
-	    !pci_is_thunderbolt_attached(to_pci_dev(dev->dev)))
+	    !dev_is_removable(&adev->pdev->dev))
 		flags |= AMD_IS_PX;
 
 	parent = pci_upstream_bridge(adev->pdev);
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
index ee7cab37dfd5..2c5d74d836f0 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
@@ -382,7 +382,7 @@ static void nbio_v2_3_enable_aspm(struct amdgpu_device
*adev,
 
 		data |= NAVI10_PCIE__LC_L0S_INACTIVITY_DEFAULT <<
PCIE_LC_CNTL__LC_L0S_INACTIVITY__SHIFT;
 
-		if (pci_is_thunderbolt_attached(adev->pdev))
+		if (dev_is_removable(&adev->pdev->dev))
 			data |= NAVI10_PCIE__LC_L1_INACTIVITY_TBT_DEFAULT  <<
PCIE_LC_CNTL__LC_L1_INACTIVITY__SHIFT;
 		else
 			data |= NAVI10_PCIE__LC_L1_INACTIVITY_DEFAULT <<
PCIE_LC_CNTL__LC_L1_INACTIVITY__SHIFT;
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 6/9] drm/nouveau: drop the use of `pci_is_thunderbolt_attached`

Currently `pci_is_thunderbolt_attached` is used to indicate a device
is connected externally.

The PCI core now marks such devices as removable and downstream drivers
can use this instead.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/nouveau/nouveau_vga.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_vga.c
b/drivers/gpu/drm/nouveau/nouveau_vga.c
index 60cd8c0463df..2c8008cb38e0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_vga.c
+++ b/drivers/gpu/drm/nouveau/nouveau_vga.c
@@ -97,7 +97,7 @@ nouveau_vga_init(struct nouveau_drm *drm)
 	vga_client_register(pdev, nouveau_vga_set_decode);
 
 	/* don't register Thunderbolt eGPU with vga_switcheroo */
-	if (pci_is_thunderbolt_attached(pdev))
+	if (dev_is_removable(&pdev->dev))
 		return;
 
 	vga_switcheroo_register_client(pdev, &nouveau_switcheroo_ops, runtime);
@@ -120,7 +120,7 @@ nouveau_vga_fini(struct nouveau_drm *drm)
 
 	vga_client_unregister(pdev);
 
-	if (pci_is_thunderbolt_attached(pdev))
+	if (dev_is_removable(&pdev->dev))
 		return;
 
 	vga_switcheroo_unregister_client(pdev);
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 7/9] drm/radeon: drop the use of `pci_is_thunderbolt_attached`

Currently `pci_is_thunderbolt_attached` is used to indicate a device
is connected externally.

The PCI core now marks such devices as removable and downstream drivers
can use this instead.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/radeon/radeon_device.c | 4 ++--
 drivers/gpu/drm/radeon/radeon_kms.c    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c
b/drivers/gpu/drm/radeon/radeon_device.c
index 4f0fbf667431..5117fce23b3f 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1439,7 +1439,7 @@ int radeon_device_init(struct radeon_device *rdev,
 
 	if (rdev->flags & RADEON_IS_PX)
 		runtime = true;
-	if (!pci_is_thunderbolt_attached(rdev->pdev))
+	if (!dev_is_removable(&rdev->pdev->dev))
 		vga_switcheroo_register_client(rdev->pdev,
 					       &radeon_switcheroo_ops, runtime);
 	if (runtime)
@@ -1527,7 +1527,7 @@ void radeon_device_fini(struct radeon_device *rdev)
 	/* evict vram memory */
 	radeon_bo_evict_vram(rdev);
 	radeon_fini(rdev);
-	if (!pci_is_thunderbolt_attached(rdev->pdev))
+	if (!dev_is_removable(&rdev->pdev->dev))
 		vga_switcheroo_unregister_client(rdev->pdev);
 	if (rdev->flags & RADEON_IS_PX)
 		vga_switcheroo_fini_domain_pm_ops(rdev->dev);
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c
b/drivers/gpu/drm/radeon/radeon_kms.c
index 11ad210919c8..e01ee7a5cf5d 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -139,7 +139,7 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned
long flags)
 	if ((radeon_runtime_pm != 0) &&
 	    radeon_has_atpx() &&
 	    ((flags & RADEON_IS_IGP) == 0) &&
-	    !pci_is_thunderbolt_attached(pdev))
+	    !dev_is_removable(&pdev->dev))
 		flags |= RADEON_IS_PX;
 
 	/* radeon_device_init should report only fatal error
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 8/9] platform/x86: amd-gmux: drop the use of `pci_is_thunderbolt_attached`

Currently `pci_is_thunderbolt_attached` is used to indicate a device
is connected externally.

The PCI core now marks such devices as removable and downstream drivers
can use this instead.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/platform/x86/apple-gmux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/apple-gmux.c
b/drivers/platform/x86/apple-gmux.c
index 04232fbc7d56..ffac15b9befd 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -596,7 +596,7 @@ static int gmux_resume(struct device *dev)
 
 static int is_thunderbolt(struct device *dev, void *data)
 {
-	return pci_is_thunderbolt_attached(to_pci_dev(dev));
+	return dev_is_removable(dev);
 }
 
 static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
-- 
2.34.1

Mario Limonciello

2022-Feb-10 22:43 UTC

head link

[Nouveau] [PATCH v2 9/9] PCI: drop `pci_is_thunderbolt_attached`

Currently `pci_is_thunderbolt_attached` is used to indicate a device
is connected externally.

As all drivers now look at the removable attribute, drop this function.

Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 include/linux/pci.h | 22 ----------------------
 1 file changed, 22 deletions(-)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index d9719eb14654..089e7e36a0d9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -2434,28 +2434,6 @@ static inline bool pci_ari_enabled(struct pci_bus *bus)
 	return bus->self && bus->self->ari_enabled;
 }
 
-/**
- * pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
- * @pdev: PCI device to check
- *
- * Walk upwards from @pdev and check for each encountered bridge if it's
part
- * of a Thunderbolt controller.  Reaching the host bridge means @pdev is not
- * Thunderbolt-attached.  (But rather soldered to the mainboard usually.)
- */
-static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
-{
-	struct pci_dev *parent = pdev;
-
-	if (dev_is_removable(&pdev->dev))
-		return true;
-
-	while ((parent = pci_upstream_bridge(parent)))
-		if (dev_is_removable(&parent->dev))
-			return true;
-
-	return false;
-}
-
 #if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
 void pci_uevent_ers(struct pci_dev *pdev, enum  pci_ers_result err_type);
 #endif
-- 
2.34.1

Nouveau - Feb 2022 - [PATCH v2 7/9] drm/radeon: drop the use of `pci_is_thunderbolt_attached`

[Nouveau] [PATCH v2 0/9] Overhaul is_thunderbolt

[Nouveau] [PATCH v2 1/9] thunderbolt: move definition of PCI_CLASS_SERIAL_USB_USB4

[Nouveau] [PATCH v2 2/9] PCI: Move `is_thunderbolt` check for lack of command completed to a quirk

[Nouveau] [PATCH v2 3/9] PCI: drop `is_thunderbolt` attribute

[Nouveau] [PATCH v2 4/9] PCI: mark USB4 devices as removable

[Nouveau] [PATCH v2 5/9] drm/amd: drop the use of `pci_is_thunderbolt_attached`

[Nouveau] [PATCH v2 6/9] drm/nouveau: drop the use of `pci_is_thunderbolt_attached`

[Nouveau] [PATCH v2 7/9] drm/radeon: drop the use of `pci_is_thunderbolt_attached`

[Nouveau] [PATCH v2 8/9] platform/x86: amd-gmux: drop the use of `pci_is_thunderbolt_attached`

[Nouveau] [PATCH v2 9/9] PCI: drop `pci_is_thunderbolt_attached`