Re: AGP bogosities

[Jesse Barnes <jbarnes@engr.sgi.com>]

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