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Date: Thu, 24 May 2007 02:11:28 +0400 From: Manu Abraham <abraham.manu@...il.com> To: Roland Dreier <rdreier@...co.com> CC: Greg KH <greg@...ah.com>, linux-pci@...ey.karlin.mff.cuni.cz, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: PCIE Roland Dreier wrote: >>> Uncompressing Linux .. Ok, booting the kernel. >>> BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor) >>> PCI: Failed to allocate mem resource #6:20000@...00000 for 0000:01:00.0 > > This message is about device 01:00.0 as it says (your nvidia video > card based on later lspci output). > > > The device is a new DTV bridge from NXP (SAA7162E) with a PCIe interface. > > > > 06:00.0 Multimedia controller: Philips Semiconductors Unknown device > > 7162 (rev 01) > > Subsystem: Twinhan Technology Co. Ltd Unknown device 0027 > > This is device 06:00.0, so it's not related to that earlier message at > all. You didn't say what problem you're having with your driver for > this device... If i uncomment the saa716x_read or write, what i get is a solid freeze on module load. If i leave it commented out, the module loads fine. static irqreturn_t saa716x_pcie_irq(int irq, void *dev_id) { struct saa716x *saa716x; u32 stat, mask; if (unlikely((saa716x = (struct saa716x *) dev_id) == NULL)) { printk(KERN_ERR "%s: Aeie NULL ptr\n", __func__); return IRQ_NONE; } // stat = saa716x_read(0x500); dprintk(verbose, SAA716x_DEBUG, 0, "=== Interrupts[%04x] [", stat); dprintk(verbose, SAA716x_DEBUG, 0, "] ==\n"); return IRQ_HANDLED; } int saa716x_pcie_init(struct saa716x *saa716x) { struct pci_dev *pdev = saa716x->pdev; int err = 0; u8 latency, revision; printk(KERN_INFO "%s: found a %s device\n", __func__, saa716x->hwconfig->model_name); pci_set_drvdata(pdev, saa716x); if ((err = pci_enable_device(pdev)) != 0) { printk(KERN_ERR "%s ERROR: pci enable failed (%i)\n", __func__, err); goto fail0; } if (request_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0), DRIVER_NAME) == NULL) { printk(KERN_ERR "%s ERROR: mem region request failed\n", __func__); err = -ENOMEM; goto fail1; } saa716x->mmio = ioremap(pci_resource_start(pdev, 0), 0x1000); // FIXME: check this size if ((err = request_irq(pdev->irq, saa716x_pcie_irq, IRQF_SHARED | IRQF_DISABLED, DRIVER_NAME, (void *) saa716x)) != 0) { printk(KERN_ERR "%s ERROR: irq request failed (%i)\n", err, __func__); goto fail2; } pci_set_master(pdev); pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency); pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision); dprintk(verbose, SAA716x_ERROR, 0, " SAA7160/1/2 Rev %d [%04x:%04x], ", revision, saa716x->pdev->subsystem_vendor, saa716x->pdev->subsystem_device); dprintk(verbose, SAA716x_ERROR, 0, "irq: %d, latency: %d\n memory: 0x%04x, mmio: 0x%p\n", saa716x->pdev->irq, latency, pci_resource_start(pdev, 0), saa716x->mmio); saa716x->verbose = verbose; // init_waitqueue_head(&saa716x->i2c_queue); /* Disable all interrupts here */ // saa716x_write(0, 0x500); return 0; fail2: iounmap(saa716x->mmio); release_mem_region(pci_resource_start(saa716x->pdev, 0), pci_resource_len(saa716x->pdev, 0)); fail1: pci_disable_device(pdev); fail0: pci_set_drvdata(pdev, NULL); return err; } EXPORT_SYMBOL_GPL(saa716x_pcie_init); > but all standard PCI stuff should work fine for PCIe > devices -- the normal PCI driver stuff is all you should need for > everything but exotic cases. That part is then fine. Does MSI require any special tinkering ? Thanks, Manu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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