From: Vidya Sagar vidyas@nvidia.com

[ Upstream commit 7246a4520b4bf1494d7d030166a11b5226f6d508 ]

Use preserve_config in place of checking for PCI_PROBE_ONLY flag to enable support for "linux,pci-probe-only" on a per host bridge basis.

This also obviates the use of adding PCI_REASSIGN_ALL_BUS flag if !PCI_PROBE_ONLY, as pci_assign_unassigned_root_bus_resources() takes care of reassigning the resources that are not already claimed.

Link: https://lore.kernel.org/r/20240508174138.3630283-5-vidyas@nvidia.com Signed-off-by: Vidya Sagar vidyas@nvidia.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pci-host-common.c | 4 ---- drivers/pci/probe.c | 20 +++++++++----------- 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c index d3924a44db02f..fd3020a399cf9 100644 --- a/drivers/pci/controller/pci-host-common.c +++ b/drivers/pci/controller/pci-host-common.c @@ -73,10 +73,6 @@ int pci_host_common_probe(struct platform_device *pdev) if (IS_ERR(cfg)) return PTR_ERR(cfg);

- /* Do not reassign resources if probe only */ - if (!pci_has_flag(PCI_PROBE_ONLY)) - pci_add_flags(PCI_REASSIGN_ALL_BUS); - bridge->sysdata = cfg; bridge->ops = (struct pci_ops *)&ops->pci_ops; bridge->msi_domain = true; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index d9fc02a71baad..0052d3c83e4a4 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -3032,20 +3032,18 @@ int pci_host_probe(struct pci_host_bridge *bridge)

bus = bridge->bus;

+ /* If we must preserve the resource configuration, claim now */ + if (bridge->preserve_config) + pci_bus_claim_resources(bus); + /* - * We insert PCI resources into the iomem_resource and - * ioport_resource trees in either pci_bus_claim_resources() - * or pci_bus_assign_resources(). + * Assign whatever was left unassigned. If we didn't claim above, + * this will reassign everything. */ - if (pci_has_flag(PCI_PROBE_ONLY)) { - pci_bus_claim_resources(bus); - } else { - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); + pci_assign_unassigned_root_bus_resources(bus);

- list_for_each_entry(child, &bus->children, node) - pcie_bus_configure_settings(child); - } + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child);

pci_bus_add_devices(bus); return 0;

From: Peng Hongchi hongchi.peng@siengine.com

[ Upstream commit 1134289b6b93d73721340b66c310fd985385e8fa ]

When using dma_map_sg() to map the scatterlist with iommu enabled, the entries in the scatterlist can be mergerd into less but longer entries in the function __finalise_sg(). So that the number of valid mapped entries is actually smaller than ureq->num_reqs,and there are still some invalid entries in the scatterlist with dma_addr=0xffffffff and len=0. Writing these invalid sg entries into the dma_desc can cause a data transmission error.

The function dma_map_sg() returns the number of valid map entries and the return value is assigned to usb_request::num_mapped_sgs in function usb_gadget_map_request_by_dev(). So that just write valid mapped entries into dma_desc according to the usb_request::num_mapped_sgs, and set the IOC bit if it's the last valid mapped entry.

This patch poses no risk to no-iommu situation, cause ureq->num_mapped_sgs equals ureq->num_sgs while using dma_direct_map_sg() to map the scatterlist whith iommu disabled.

Signed-off-by: Peng Hongchi hongchi.peng@siengine.com Link: https://lore.kernel.org/r/20240523100315.7226-1-hongchi.peng@siengine.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/dwc2/gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index f6b2a4f2e59d9..4422da5613652 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -886,10 +886,10 @@ static void dwc2_gadget_config_nonisoc_xfer_ddma(struct dwc2_hsotg_ep *hs_ep, }

/* DMA sg buffer */ - for_each_sg(ureq->sg, sg, ureq->num_sgs, i) { + for_each_sg(ureq->sg, sg, ureq->num_mapped_sgs, i) { dwc2_gadget_fill_nonisoc_xfer_ddma_one(hs_ep, &desc, sg_dma_address(sg) + sg->offset, sg_dma_len(sg), - sg_is_last(sg)); + (i == (ureq->num_mapped_sgs - 1))); desc_count += hs_ep->desc_count; }

From: Jiaxun Yang jiaxun.yang@flygoat.com

[ Upstream commit 98a9e2ac3755a353eefea8c52e23d5b0c50f3899 ]

Add it to silent warning: arch/mips/boot/dts/loongson/ls7a-pch.dtsi:68.16-416.5: Warning (interrupt_provider): /bus@10000000/pci@1a000000: '#interrupt-cells' found, but node is not an interrupt provider arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts:32.31-40.4: Warning (interrupt_provider): /bus@10000000/msi-controller@2ff00000: Missing '#interrupt-cells' in interrupt provider arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dtb: Warning (interrupt_map): Failed prerequisite 'interrupt_provider'

Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com Signed-off-by: Thomas Bogendoerfer tsbogend@alpha.franken.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts | 1 + 1 file changed, 1 insertion(+)

diff --git a/arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts b/arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts index c945f8565d543..fb180cb2b8e2c 100644 --- a/arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts +++ b/arch/mips/boot/dts/loongson/loongson64g_4core_ls7a.dts @@ -33,6 +33,7 @@ msi: msi-controller@2ff00000 { compatible = "loongson,pch-msi-1.0"; reg = <0 0x2ff00000 0 0x8>; interrupt-controller; + #interrupt-cells = <1>; msi-controller; loongson,msi-base-vec = <64>; loongson,msi-num-vecs = <192>;

From: Kai-Heng Feng kai.heng.feng@canonical.com

[ Upstream commit 5afc2f763edc5daae4722ee46fea4e627d01fa90 ]

If the link is powered off during suspend, electrical noise may cause errors that are logged via AER. If the AER interrupt is enabled and shares an IRQ with PME, that causes a spurious wakeup during suspend.

Disable the AER interrupt during suspend to prevent this. Clear error status before re-enabling IRQ interrupts during resume so we don't get an interrupt for errors that occurred during the suspend/resume process.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=209149 Link: https://bugzilla.kernel.org/show_bug.cgi?id=216295 Link: https://bugzilla.kernel.org/show_bug.cgi?id=218090 Link: https://lore.kernel.org/r/20240416043225.1462548-2-kai.heng.feng@canonical.c... Signed-off-by: Kai-Heng Feng kai.heng.feng@canonical.com [bhelgaas: drop pci_ancestor_pr3_present() etc, commit log] Signed-off-by: Bjorn Helgaas bhelgaas@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/pcie/aer.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 4f7744aab6c72..2908bfda88804 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1382,6 +1382,22 @@ static int aer_probe(struct pcie_device *dev) return 0; }

+static int aer_suspend(struct pcie_device *dev) +{ + struct aer_rpc *rpc = get_service_data(dev); + + aer_disable_rootport(rpc); + return 0; +} + +static int aer_resume(struct pcie_device *dev) +{ + struct aer_rpc *rpc = get_service_data(dev); + + aer_enable_rootport(rpc); + return 0; +} + /** * aer_root_reset - reset Root Port hierarchy, RCEC, or RCiEP * @dev: pointer to Root Port, RCEC, or RCiEP @@ -1453,6 +1469,8 @@ static struct pcie_port_service_driver aerdriver = { .service = PCIE_PORT_SERVICE_AER,

.probe = aer_probe, + .suspend = aer_suspend, + .resume = aer_resume, .remove = aer_remove, };

From: Kishon Vijay Abraham I kishon@ti.com

[ Upstream commit 86f271f22bbb6391410a07e08d6ca3757fda01fa ]

Errata #i2037 in AM65x/DRA80xM Processors Silicon Revision 1.0 (SPRZ452D_July 2018_Revised December 2019 [1]) mentions when an inbound PCIe TLP spans more than two internal AXI 128-byte bursts, the bus may corrupt the packet payload and the corrupt data may cause associated applications or the processor to hang.

The workaround for Errata #i2037 is to limit the maximum read request size and maximum payload size to 128 bytes. Add workaround for Errata #i2037 here.

The errata and workaround is applicable only to AM65x SR 1.0 and later versions of the silicon will have this fixed.

[1] -> https://www.ti.com/lit/er/sprz452i/sprz452i.pdf

Link: https://lore.kernel.org/linux-pci/16e1fcae-1ea7-46be-b157-096e05661b15@sieme... Signed-off-by: Kishon Vijay Abraham I kishon@ti.com Signed-off-by: Achal Verma a-verma1@ti.com Signed-off-by: Vignesh Raghavendra vigneshr@ti.com Signed-off-by: Jan Kiszka jan.kiszka@siemens.com Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Reviewed-by: Siddharth Vadapalli s-vadapalli@ti.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/dwc/pci-keystone.c | 44 ++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index 09379e5f7724a..24031123a5504 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -35,6 +35,11 @@ #define PCIE_DEVICEID_SHIFT 16

/* Application registers */ +#define PID 0x000 +#define RTL GENMASK(15, 11) +#define RTL_SHIFT 11 +#define AM6_PCI_PG1_RTL_VER 0x15 + #define CMD_STATUS 0x004 #define LTSSM_EN_VAL BIT(0) #define OB_XLAT_EN_VAL BIT(1) @@ -105,6 +110,8 @@

#define to_keystone_pcie(x) dev_get_drvdata((x)->dev)

+#define PCI_DEVICE_ID_TI_AM654X 0xb00c + struct ks_pcie_of_data { enum dw_pcie_device_mode mode; const struct dw_pcie_host_ops *host_ops; @@ -528,7 +535,11 @@ static int ks_pcie_start_link(struct dw_pcie *pci) static void ks_pcie_quirk(struct pci_dev *dev) { struct pci_bus *bus = dev->bus; + struct keystone_pcie *ks_pcie; + struct device *bridge_dev; struct pci_dev *bridge; + u32 val; + static const struct pci_device_id rc_pci_devids[] = { { PCI_DEVICE(PCI_VENDOR_ID_TI, PCIE_RC_K2HK), .class = PCI_CLASS_BRIDGE_PCI << 8, .class_mask = ~0, }, @@ -540,6 +551,11 @@ static void ks_pcie_quirk(struct pci_dev *dev) .class = PCI_CLASS_BRIDGE_PCI << 8, .class_mask = ~0, }, { 0, }, }; + static const struct pci_device_id am6_pci_devids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM654X), + .class = PCI_CLASS_BRIDGE_PCI << 8, .class_mask = ~0, }, + { 0, }, + };

if (pci_is_root_bus(bus)) bridge = dev; @@ -561,10 +577,36 @@ static void ks_pcie_quirk(struct pci_dev *dev) */ if (pci_match_id(rc_pci_devids, bridge)) { if (pcie_get_readrq(dev) > 256) { - dev_info(&dev->dev, "limiting MRRS to 256\n"); + dev_info(&dev->dev, "limiting MRRS to 256 bytes\n"); pcie_set_readrq(dev, 256); } } + + /* + * Memory transactions fail with PCI controller in AM654 PG1.0 + * when MRRS is set to more than 128 bytes. Force the MRRS to + * 128 bytes in all downstream devices. + */ + if (pci_match_id(am6_pci_devids, bridge)) { + bridge_dev = pci_get_host_bridge_device(dev); + if (!bridge_dev && !bridge_dev->parent) + return; + + ks_pcie = dev_get_drvdata(bridge_dev->parent); + if (!ks_pcie) + return; + + val = ks_pcie_app_readl(ks_pcie, PID); + val &= RTL; + val >>= RTL_SHIFT; + if (val != AM6_PCI_PG1_RTL_VER) + return; + + if (pcie_get_readrq(dev) > 128) { + dev_info(&dev->dev, "limiting MRRS to 128 bytes\n"); + pcie_set_readrq(dev, 128); + } + } } DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, ks_pcie_quirk);

From: Dan Williams dan.j.williams@intel.com

[ Upstream commit a4e772898f8bf2e7e1cf661a12c60a5612c4afab ]

One of the true positives that the cfg_access_lock lockdep effort identified is this sequence:

WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: <TASK> ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120

Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything *but* the bridge itself.

For the same motivation as adding:

bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge);

to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock().

Link: https://lore.kernel.org/r/171711747501.1628941.15217746952476635316.stgit@dw... Reported-by: Imre Deak imre.deak@intel.com Closes: http://lore.kernel.org/r/6657833b3b5ae_14984b29437@dwillia2-xfh.jf.intel.com... Signed-off-by: Dan Williams dan.j.williams@intel.com Signed-off-by: Keith Busch kbusch@kernel.org [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com] Signed-off-by: Bjorn Helgaas bhelgaas@google.com Tested-by: Hans de Goede hdegoede@redhat.com Tested-by: Kalle Valo kvalo@kernel.org Reviewed-by: Dave Jiang dave.jiang@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/pci.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 67216f4ea2151..84c1300afb951 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5491,10 +5491,12 @@ static void pci_bus_lock(struct pci_bus *bus) { struct pci_dev *dev;

+ pci_dev_lock(bus->self); list_for_each_entry(dev, &bus->devices, bus_list) { - pci_dev_lock(dev); if (dev->subordinate) pci_bus_lock(dev->subordinate); + else + pci_dev_lock(dev); } }

@@ -5506,8 +5508,10 @@ static void pci_bus_unlock(struct pci_bus *bus) list_for_each_entry(dev, &bus->devices, bus_list) { if (dev->subordinate) pci_bus_unlock(dev->subordinate); - pci_dev_unlock(dev); + else + pci_dev_unlock(dev); } + pci_dev_unlock(bus->self); }

/* Return 1 on successful lock, 0 on contention */ @@ -5515,15 +5519,15 @@ static int pci_bus_trylock(struct pci_bus *bus) { struct pci_dev *dev;

+ if (!pci_dev_trylock(bus->self)) + return 0; + list_for_each_entry(dev, &bus->devices, bus_list) { - if (!pci_dev_trylock(dev)) - goto unlock; if (dev->subordinate) { - if (!pci_bus_trylock(dev->subordinate)) { - pci_dev_unlock(dev); + if (!pci_bus_trylock(dev->subordinate)) goto unlock; - } - } + } else if (!pci_dev_trylock(dev)) + goto unlock; } return 1;

@@ -5531,8 +5535,10 @@ static int pci_bus_trylock(struct pci_bus *bus) list_for_each_entry_continue_reverse(dev, &bus->devices, bus_list) { if (dev->subordinate) pci_bus_unlock(dev->subordinate); - pci_dev_unlock(dev); + else + pci_dev_unlock(dev); } + pci_dev_unlock(bus->self); return 0; }

@@ -5564,9 +5570,10 @@ static void pci_slot_lock(struct pci_slot *slot) list_for_each_entry(dev, &slot->bus->devices, bus_list) { if (!dev->slot || dev->slot != slot) continue; - pci_dev_lock(dev); if (dev->subordinate) pci_bus_lock(dev->subordinate); + else + pci_dev_lock(dev); } }

@@ -5592,14 +5599,13 @@ static int pci_slot_trylock(struct pci_slot *slot) list_for_each_entry(dev, &slot->bus->devices, bus_list) { if (!dev->slot || dev->slot != slot) continue; - if (!pci_dev_trylock(dev)) - goto unlock; if (dev->subordinate) { if (!pci_bus_trylock(dev->subordinate)) { pci_dev_unlock(dev); goto unlock; } - } + } else if (!pci_dev_trylock(dev)) + goto unlock; } return 1;

@@ -5610,7 +5616,8 @@ static int pci_slot_trylock(struct pci_slot *slot) continue; if (dev->subordinate) pci_bus_unlock(dev->subordinate); - pci_dev_unlock(dev); + else + pci_dev_unlock(dev); } return 0; }