Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 5 Nov 2001 18:44:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 5 Nov 2001 18:43:54 -0500 Received: from addleston.eee.nott.ac.uk ([128.243.70.70]:52907 "HELO addleston.eee.nott.ac.uk") by vger.kernel.org with SMTP id ; Mon, 5 Nov 2001 18:43:38 -0500 Date: Mon, 5 Nov 2001 23:43:35 +0000 (GMT) From: Matthew Clark X-X-Sender: To: Subject: PCI interrupts Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dear kernel list, I am writing a dev driver for a pci device and I am having some difficultly getting the interrupts line. As far as I understood the BIOS / kernel would sort out a unique interrupt line for me which I could then get by registering with the system. In my development system the PCI card I am developing the driver for reports (from the PCI config region) that it is using interrupt 5. I can't register this interrupt as it is already in use by the USB controller. (a) should my card have a unique number- if so what should I do? (b) if it shouldn't have a unique number do I have to share the interrupt (with the usb controller) or can I change it to another address (by writing to the config space?)? If I have to share it how do I do this- (my card will generate a lot of interrupt traffic)?. I have free interrupts and would prefer not to share the interrrupt for this device. Any help / suggestions gratefully received- apologies if this is in the wrong place-- Thanks matt snippet from lspci -v ..... 00:1f.2 USB Controller: Intel Corporation 82801AA USB (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation 82801AA USB Flags: bus master, medium devsel, latency 0, IRQ 5 ...... 01:05.0 DMA controller: PLX Technology, Inc. PCI <-> IOBus Bridge (rev 02) (prog-if 00 [8237]) Subsystem: PLX Technology, Inc. PCI <-> IOBus Bridge Flags: medium devsel, IRQ 5 ...... Ignore the PLX PCI id- the card developers didn't get their own number..... cat /proc/interrupts CPU0 0: 2099604 XT-PIC timer 1: 3541 XT-PIC keyboard 2: 0 XT-PIC cascade 3: 11 XT-PIC serial 4: 1537 XT-PIC serial 5: 0 XT-PIC usb-uhci 8: 1 XT-PIC rtc 11: 196886 XT-PIC eth0, i810@PCI:0:1:0 14: 13005 XT-PIC ide0 15: 0 XT-PIC ide1 NMI: 0 ERR: 0 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/