On Thursday, March 10, 2005 6:11 pm, Paul Mackerras wrote: > What is the relationship in the PCI device tree between the video > cards and their bridges? Is there for instance only one AGP bridge > per host bridge?
I *think* a TIO (numalink<->agp & numalink<->pci) has two AGP busses coming off of it... > Interesting, could you post the output from lspci -v on that system? flatearth:~ # lspci -v 0000:01:01.0 Co-processor: Silicon Graphics, Inc. IOC4 I/O controller (rev 4f) Flags: bus master, 66Mhz, medium devsel, latency 255, IRQ 60 Memory at c00000080f200000 (32-bit, non-prefetchable) 0000:01:03.0 Class 0106: Vitesse Semiconductor VSC7174 PCI/PCI-X Serial ATA Host Bus Controller (rev 01) Subsystem: Vitesse Semiconductor VSC7174 PCI/PCI-X Serial ATA Host Bus Controller Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 61 Memory at c00000080f300000 (64-bit, non-prefetchable) Capabilities: [e0] PCI-X non-bridge device. Capabilities: [e8] Power Management version 2 Capabilities: [f0] Message Signalled Interrupts: 64bit+ Queue=0/2 Enable- 0000:01:04.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701 Gigabit Ethernet (rev 15) Subsystem: Silicon Graphics, Inc. SGI IO9/IO10 Gigabit Ethernet (Copper) Flags: bus master, 66Mhz, medium devsel, latency 48, IRQ 62 Memory at c00000080f310000 (64-bit, non-prefetchable) Capabilities: [40] PCI-X non-bridge device. Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data Capabilities: [58] Message Signalled Interrupts: 64bit+ Queue=0/3 Enable- 0000:02:01.0 VGA compatible controller: ATI Technologies Inc Rage 128 RE/SG (prog-if 00 [VGA]) Subsystem: ATI Technologies Inc Xpert 128 Flags: bus master, stepping, medium devsel, latency 64, IRQ 63 Memory at c0000008a4000000 (32-bit, prefetchable) [size=c00000080fe20000] I/O ports at c00000080fa00000 [size=256] Memory at c00000080fe00000 (32-bit, non-prefetchable) [size=16K] Expansion ROM at 0000000000020000 [disabled] Capabilities: [5c] Power Management version 1 0000:02:02.0 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI]) Subsystem: Orange Micro Root Hub Flags: bus master, medium devsel, latency 8, IRQ 64 Memory at c00000080fe04000 (32-bit, non-prefetchable) Capabilities: [40] Power Management version 2 0000:02:02.1 USB Controller: NEC Corporation USB (rev 41) (prog-if 10 [OHCI]) Subsystem: Orange Micro Root Hub Flags: bus master, medium devsel, latency 8, IRQ 65 Memory at c00000080fe05000 (32-bit, non-prefetchable) Capabilities: [40] Power Management version 2 0000:02:02.2 USB Controller: NEC Corporation USB 2.0 (rev 02) (prog-if 20 [EHCI]) Subsystem: Orange Micro Root hub Flags: bus master, medium devsel, latency 68, IRQ 65 Memory at c00000080fe06000 (32-bit, non-prefetchable) Capabilities: [40] Power Management version 2 0000:17:00.0 VGA compatible controller: ATI Technologies Inc R350 NK [Fire GL X2] (rev 80) (prog-if 00 [VGA]) Subsystem: ATI Technologies Inc: Unknown device 0152 Flags: bus master, stepping, 66Mhz, medium devsel, latency 0, IRQ 67 Memory at c0000041c8000000 (32-bit, prefetchable) [size=c0000041c0120000] I/O ports at c000004023001000 [size=256] Memory at c0000041c0100000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at 0000000000020000 [disabled] Capabilities: [58] AGP version 3.0 Capabilities: [50] Power Management version 2 0000:17:00.1 Display controller: ATI Technologies Inc: Unknown device 4e6b (rev80) Subsystem: ATI Technologies Inc: Unknown device 0153 Flags: bus master, stepping, 66Mhz, medium devsel, latency 0 Memory at c0000041d0000000 (32-bit, prefetchable) [size=c0000041c0000000] Memory at c0000041c0110000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at <unassigned> Capabilities: [50] Power Management version 2 0000:1b:00.0 VGA compatible controller: ATI Technologies Inc R350 NK [Fire GL X2] (rev 80) (prog-if 00 [VGA]) Subsystem: ATI Technologies Inc: Unknown device 0152 Flags: bus master, stepping, 66Mhz, medium devsel, latency 0, IRQ 66 Memory at c00000c1c8000000 (32-bit, prefetchable) [size=c00000c1c0120000] I/O ports at c00000c023001000 [size=256] Memory at c00000c1c0100000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at 0000000000020000 [disabled] Capabilities: [58] AGP version 3.0 Capabilities: [50] Power Management version 2 0000:1b:00.1 Display controller: ATI Technologies Inc: Unknown device 4e6b (rev80) Subsystem: ATI Technologies Inc: Unknown device 0153 Flags: bus master, stepping, 66Mhz, medium devsel, latency 0 Memory at c00000c1d0000000 (32-bit, prefetchable) [size=c00000c1c0000000] Memory at c00000c1c0110000 (32-bit, non-prefetchable) [size=64K] Expansion ROM at <unassigned> Capabilities: [50] Power Management version 2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/