Hi Gustavo, On 27/02/18 12:42, Gustavo Pimentel wrote: > Hi Marc, > > I'm having some problems in my setup related to MSI-X, maybe you could help me > debugging where could be the problem. > > Currently I have a RC (bridge) with 1 MSI-X interrupt and a commercial USB 3.0 > EP capable of 8 MSI-X interrupts, however the xhci driver only uses 2 interrupts. > > I have posted below some debug info gathered during my tests. > > > # cat /proc/interrupts > CPU0 > 3: 10014 ARC In-core Intc 3 Timer0 (per-cpu-tick) > 4: 0 dw-apb-ictl 4 eth0 > 8: 1 dw-apb-ictl 8 ehci_hcd:usb1, ohci_hcd:usb2 > 9: 38 dw-apb-ictl 7 dw-mci > 14: 0 dw-apb-ictl 14 e001d000.i2c > 16: 0 dw-apb-ictl 16 e001f000.i2c > 19: 4065 dw-apb-ictl 19 ttyS3 > 46: 0 PCI-MSI 0 aerdrv > 47: 1 PCI-MSI 524288 xhci_hcd > 48: 0 PCI-MSI 524289 xhci_hcd > # > # > # find /sys/ | grep msi > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/msi_bus > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/msi_irqs > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/msi_irqs/46 > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/msi_bus > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/msi_irqs > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/msi_irqs/48 > /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/msi_irqs/47 > # > # > # cat /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/ms > i_bus > 1 > # > # > # cat /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/ms > i_irqs/46 > msix > # > # cat /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/00 > 00:01:00.0/msi_bus > 1 > # > # cat /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/00 > 00:01:00.0/msi_irqs/48 > msix > # > # > # cat /sys/devices/platform/haps_tunnel/dfc00000.pcie/pci0000:00/0000:00:00.0/00 > 00:01:00.0/msi_irqs/47 > msix > > > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:dw_pcie_host_init:449) pp->num_vectors = 64 > (GP:dw_pcie_host_init:453) dw_pcie_allocate_domains > (GP:dw_pcie_allocate_domains:277) pp->num_vectors = 64 > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:pci_alloc_irq_vectors_affinity:1214) MSI-X > (GP:__pci_enable_msix_range:1132) min=1, max=32 > (GP:__pci_enable_msix:975) > (GP:__pci_enable_msix:981) nr_entries = 1, nvec = 32 > (GP:__pci_enable_msix_range:1145) rc=1 > (GP:__pci_enable_msix:975) > (GP:__pci_enable_msix:981) nr_entries = 1, nvec = 1 > (GP:__pci_enable_msix:987) > (GP:msix_capability_init:773) > (GP:msix_capability_init:777) Disable MSI-X > (GP:msix_capability_init:780) Control register 0x00000000 > (GP:msix_map_region:682) Table offset = 0x00000000, bir = 0) > (GP:msix_map_region:685) phys_addr = 0xD0500000, nr_entries = 1, ENTRY_SIZE = 16 > bytes, table size = 16 bytes) > (GP:msix_setup_entries:701) Allocate MSI entries 0/1 > (GP:msix_setup_entries:719) > (GP:msix_setup_entries:725) dev->irq = 45, base = d0500000, > entry->msi_attrib.entry_nr = 0 > (GP:pci_msi_setup_msi_irqs:53) msi_domain_alloc_irqs > (GP:dw_pcie_irq_domain_alloc:231) nr_irqs = 1 > (GP:dw_pcie_irq_domain_alloc:232) pp->num_vectors = 64 > (GP:dw_pcie_irq_domain_alloc:233) order_base_2(nr_irqs) = 0 > (GP:dw_pcie_irq_domain_alloc:245) virq + 0 = 46, bit + 0 = 0 > (GP:msi_domain_alloc_irqs:399) IRQ_DOMAIN_ACTIVATE_IRQ > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:__irq_domain_activate_irq:1521) > (GP:__irq_domain_activate_irq:1516) > (GP:msi_domain_activate:107) > (GP:dw_pci_setup_msi_msg:142) msg_lo = 0x00000000, msg->address_hi = 0x9A228000, > msg->data = 0x00000000, hwirq = 0 > (GP:__pci_write_msi_msg:320) msg->address_lo = 0x9A228000, msg->address_hi = > 0x00000000, msg->data = 0x00000000 > (GP:msix_capability_init:804) Mask all MSI-X and enable MSI-X > (GP:msix_program_entries:743) > (GP:msix_capability_init:810) Populating MSI sysfs > (GP:msix_capability_init:818) Unmask all MSI-X > (GP:__pci_enable_msix_range:1145) rc=0 > (GP:irq_domain_activate_irq:1556) ALREADY ACTIVATED > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:xhci_setup_msix:264) > (GP:pci_alloc_irq_vectors_affinity:1214) MSI-X > (GP:__pci_enable_msix_range:1132) min=2, max=2 > (GP:__pci_enable_msix:975) > (GP:__pci_enable_msix:981) nr_entries = 8, nvec = 2 > (GP:__pci_enable_msix:987) > (GP:msix_capability_init:773) > (GP:msix_capability_init:777) Disable MSI-X > (GP:msix_capability_init:780) Control register 0x00000007 > (GP:msix_map_region:682) Table offset = 0x00002000, bir = 0) > (GP:msix_map_region:685) phys_addr = 0xD0402000, nr_entries = 8, ENTRY_SIZE = 16 > bytes, table size = 128 bytes) > (GP:msix_setup_entries:701) Allocate MSI entries 0/2 > (GP:msix_setup_entries:719) > (GP:msix_setup_entries:725) dev->irq = 45, base = d0402000, > entry->msi_attrib.entry_nr = 0 > (GP:msix_setup_entries:701) Allocate MSI entries 1/2 > (GP:msix_setup_entries:719) > (GP:msix_setup_entries:725) dev->irq = 45, base = d0402000, > entry->msi_attrib.entry_nr = 1 > (GP:pci_msi_setup_msi_irqs:53) msi_domain_alloc_irqs > (GP:dw_pcie_irq_domain_alloc:231) nr_irqs = 1 > (GP:dw_pcie_irq_domain_alloc:232) pp->num_vectors = 64 > (GP:dw_pcie_irq_domain_alloc:233) order_base_2(nr_irqs) = 0 > (GP:dw_pcie_irq_domain_alloc:245) virq + 0 = 47, bit + 0 = 1 > (GP:dw_pcie_irq_domain_alloc:231) nr_irqs = 1 > (GP:dw_pcie_irq_domain_alloc:232) pp->num_vectors = 64 > (GP:dw_pcie_irq_domain_alloc:233) order_base_2(nr_irqs) = 0 > (GP:dw_pcie_irq_domain_alloc:245) virq + 0 = 48, bit + 0 = 2 > (GP:msi_domain_alloc_irqs:399) IRQ_DOMAIN_ACTIVATE_IRQ > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:__irq_domain_activate_irq:1521) > (GP:__irq_domain_activate_irq:1516) > (GP:msi_domain_activate:107) > (GP:dw_pci_setup_msi_msg:142) msg_lo = 0x00000001, msg->address_hi = 0x9A228000, > msg->data = 0x00000000, hwirq = 1 > (GP:__pci_write_msi_msg:320) msg->address_lo = 0x9A228000, msg->address_hi = > 0x00000000, msg->data = 0x00000001 > (GP:msi_domain_alloc_irqs:399) IRQ_DOMAIN_ACTIVATE_IRQ > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:__irq_domain_activate_irq:1521) > (GP:__irq_domain_activate_irq:1516) > (GP:msi_domain_activate:107) > (GP:dw_pci_setup_msi_msg:142) msg_lo = 0x00000002, msg->address_hi = 0x9A228000, > msg->data = 0x00000000, hwirq = 2 > (GP:__pci_write_msi_msg:320) msg->address_lo = 0x9A228000, msg->address_hi = > 0x00000000, msg->data = 0x00000002 > (GP:msix_capability_init:804) Mask all MSI-X and enable MSI-X > (GP:msix_program_entries:743) > (GP:msix_capability_init:810) Populating MSI sysfs > (GP:msix_capability_init:818) Unmask all MSI-X > (GP:__pci_enable_msix_range:1145) rc=0 > (GP:xhci_setup_msix:285) 0/2 > (GP:irq_domain_activate_irq:1556) ALREADY ACTIVATED > (GP:xhci_setup_msix:285) 1/2 > (GP:irq_domain_activate_irq:1556) ALREADY ACTIVATED > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > (GP:irq_domain_activate_irq:1552) NOT ACTIVATED > (GP:__irq_domain_activate_irq:1516) > > Me and João have looked to the sequence and this seems to be correct, however we > are not receiving any interrupts and that originates the xhci to abort... > > xhci_hcd 0000:01:00.0: Abort failed to stop command ring: -110 > xhci_hcd 0000:01:00.0: xHCI host controller not responding, assume dead > xhci_hcd 0000:01:00.0: HC died; cleaning up > xhci_hcd 0000:01:00.0: Error while assigning device slot ID > xhci_hcd 0000:01:00.0: Max number of devices this xHCI host supports is 64. > usb usb3-port1: couldn't allocate usb_device > > Any clue? Thanks in advance. It is hard to dig in such a trace. One thing that strikes me is that I don't see any trace that suggest that the interrupts get unmasked. That should happen when the driver issues a request_irq. I'd suggest you investigate that area. Thanks, M. -- Jazz is not dead. It just smells funny...
