From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <481AC93E.3030107@domain.hid> Date: Fri, 02 May 2008 09:56:46 +0200 From: Philippe Gerum MIME-Version: 1.0 References: <481AA6B5.9070508@domain.hid> In-Reply-To: <481AA6B5.9070508@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: Philippe Gerum Subject: Re: [Xenomai-help] MSI Interrupt Crash Reply-To: rpm@xenomai.org List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: jeff koftinoff Cc: xenomai@xenomai.org jeff koftinoff wrote: > > Hi all, > > I am currently writing an rtdm driver for an fpga card. > I am using the latest Xenomai version from the svn repository and kernel > version 2.6.24.5. > This runs on a Core2Duo with a debian 64 bit version. > The driver seems to work fine as long as I use legacy interrupts and not > MSI's. > > > As soon as I use pci_enable_msi before rtdm_irq_request I get: > > [ 4260.359093] fpga_driver :MSI Enabled > [ 4260.359095] fpga_driver :IORESOURCE_IRQ IRQ: 248 > [ 4260.359109] Unable to handle kernel NULL pointer dereference at > 0000000000000000 RIP: > [ 4260.359113] [<0000000000000000>] > [ 4260.359117] PGD 3b1f7067 PUD 3b1f6067 PMD 0 > [ 4260.359121] Oops: 0010 [1] SMP > [ 4260.359125] CPU 1 > [ 4260.359127] Modules linked in: fpga_module(P) af_packet binfmt_misc > rfcomm l2cap bluetooth ppdev ipv6 sbs container dock video output sbshc > battery iptable_filter ip_tables x_tables ac coretemp max6650 sbp2 > parport_pc lp parport atl1 mii i2c_core psmouse serio_raw button shpchp > iTCO_wdt iTCO_vendor_support intel_agp pci_hotplug evdev pcspkr ext3 jbd > mbcache sg sr_mod cdrom ata_generic sd_mod pata_acpi usbhid hid ohci1394 > ieee1394 ahci pata_jmicron libata scsi_mod ehci_hcd uhci_hcd usbcore > dm_mirror dm_snapshot dm_mod fan fuse > [ 4260.359179] Pid: 7016, comm: insmod Tainted: P 2.6.24.5 #1 > [ 4260.359181] RIP: 0010:[<0000000000000000>] [<0000000000000000>] > [ 4260.359185] RSP: 0000:ffff81003b23dc80 EFLAGS: 00010246 > [ 4260.359187] RAX: ffffffff805dc2c0 RBX: 0000000000000000 RCX: > ffff810001018780 > [ 4260.359189] RDX: ffff81008099a000 RSI: 0000000000000000 RDI: > 00000000000000f8 > [ 4260.359192] RBP: ffffffff882cc688 R08: 0000000000000000 R09: > 00000000000000c1 > [ 4260.359194] R10: 0000000000000000 R11: 0000000000000000 R12: > ffff81003ee87800 > [ 4260.359196] R13: ffffffff882cbee0 R14: 0000000000000000 R15: > 000000000000000f > [ 4260.359198] FS: 00002b43257436e0(0000) GS:ffff81003ec01700(0000) > knlGS:0000000000000000 > [ 4260.359200] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > [ 4260.359202] CR2: 0000000000000000 CR3: 0000000032168000 CR4: > 00000000000006e0 > [ 4260.359204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 4260.359206] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > 0000000000000400 > [ 4260.359209] Process insmod (pid: 7016, threadinfo ffff81003b23c000, > task ffff810032166fc0) > [ 4260.359210] Stack: ffffffff8041e0ff ffff81003ee87800 > ffffffff802c8a58 ffff81003ee87800 > [ 4260.359216] ffff81003ee87800 ffff81003ee87800 ffffffff882ca374 > 0000000000000000 > [ 4260.359221] ffffffff882ca521 0000000000000001 ffff81003ee87870 > ffffffff882cc1a0 > [ 4260.359225] Call Trace: > [ 4260.359231] [] rthal_irq_enable+0x2f/0x40 > [ 4260.359236] [] rtdm_irq_request+0x48/0x60 > [ 4260.359242] [] > :fpga_module:pci_request_resources+0x104/0x1d0 > [ 4260.359246] [] :fpga_module:pci_probe+0xe1/0x180 > [ 4260.359250] [] pci_device_probe+0xf8/0x170 > [ 4260.359256] [] driver_probe_device+0x9c/0x1b0 > [ 4260.359259] [] __driver_attach+0xc9/0xd0 > [ 4260.359262] [] __driver_attach+0x0/0xd0 > [ 4260.359265] [] bus_for_each_dev+0x4d/0x80 > [ 4260.359270] [] bus_add_driver+0xac/0x220 > [ 4260.359274] [] __pci_register_driver+0x69/0xb0 > [ 4260.359280] [] :fpga_module:card_init+0x37/0x64 > [ 4260.359284] [] sys_init_module+0x18e/0x1a90 > [ 4260.359293] [] _atomic_dec_and_lock+0x48/0x70 > [ 4260.359298] [] param_get_int+0x0/0x20 > [ 4260.359304] [] system_call+0x92/0x97 > [ 4260.359308] > [ 4260.359310] > [ 4260.359310] Code: Bad RIP value. > [ 4260.359313] RIP [<0000000000000000>] > [ 4260.359315] RSP > [ 4260.359316] CR2: 0000000000000000 > [ 4260.359325] ---[ end trace 502b14894d3ed93b ]--- > > Any advice? > Does this help? --- include/asm-x86/wrappers_64.h (revision 3719) +++ include/asm-x86/wrappers_64.h (revision 3720) @@ -31,8 +31,8 @@ #define rthal_irq_descp(irq) (irq_desc + irq) #define rthal_irq_desc_status(irq) (rthal_irq_descp(irq)->status) -#define rthal_irq_chip_enable(irq) ({ rthal_irq_descp(irq)->chip->enable(irq); 0; }) -#define rthal_irq_chip_disable(irq) ({ rthal_irq_descp(irq)->chip->disable(irq); 0; }) +#define rthal_irq_chip_enable(irq) ({ rthal_irq_descp(irq)->chip->unmask(irq); 0; }) +#define rthal_irq_chip_disable(irq) ({ rthal_irq_descp(irq)->chip->mask(irq); 0; }) #define rthal_irq_chip_end(irq) ({ rthal_irq_descp(irq)->ipipe_end(irq, rthal_irq_descp(irq)); 0; }) typedef irq_handler_t rthal_irq_host_handler_t; -- Philippe.