Messages in this thread Patch in this message | | | Subject | [PATCH] move dma_consistent_dma_mask to the generic device | From | James Bottomley <> | Date | 25 Feb 2004 19:34:45 -0600 |
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pci_dev.consistent_dma_mask was introduced to get around problems in the IA64 Altix machine.
Now, we have a use for it in x86: the aacraid needs coherent memory in a 31 bit address range (2GB). Unfortunately, x86 is converted to the dma model, so it can't see the pci_dev by the time coherent memory is allocated.
The solution to all of this is to move pci_dev.consistent_dma_mask to dev.coherent_dma_mask and make x86 use it in the dma_alloc_coherent() calls.
This should allow me to make the aacraid set the coherent mask instead of using it's current dma_mask juggling.
I copied Matthew because parisc also has a parisc_device that needed to be converted over.
James
===== arch/i386/kernel/pci-dma.c 1.11 vs edited ===== --- 1.11/arch/i386/kernel/pci-dma.c Mon Jan 13 10:28:47 2003 +++ edited/arch/i386/kernel/pci-dma.c Wed Feb 25 14:58:56 2004 @@ -20,8 +20,10 @@ /* ignore region specifiers */ gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); - if (dev == NULL || (*dev->dma_mask < 0xffffffff)) + if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) { + printk("COHERENT MASK 0x%llx\n", dev->coherent_dma_mask); gfp |= GFP_DMA; + } ret = (void *)__get_free_pages(gfp, get_order(size)); if (ret != NULL) { ===== arch/parisc/kernel/drivers.c 1.10 vs edited ===== --- 1.10/arch/parisc/kernel/drivers.c Fri Feb 6 08:23:39 2004 +++ edited/arch/parisc/kernel/drivers.c Wed Feb 25 15:11:50 2004 @@ -618,6 +618,7 @@ tmp1); /* make the generic dma mask a pointer to the parisc one */ dev->dev.dma_mask = &dev->dma_mask; + dev->dev.coherent_dma_mask = dev->dma_mask; pr_debug("device_register(%s)\n", dev->dev.bus_id); device_register(&dev->dev); } ===== arch/parisc/kernel/pci-dma.c 1.7 vs edited ===== --- 1.7/arch/parisc/kernel/pci-dma.c Tue Feb 3 23:41:56 2004 +++ edited/arch/parisc/kernel/pci-dma.c Wed Feb 25 15:15:00 2004 @@ -372,7 +372,7 @@ ** ISA cards will certainly only support 24-bit DMA addressing. ** Not clear if we can, want, or need to support ISA. */ - if (!dev || *dev->dma_mask != 0xffffffff) + if (!dev || *dev->coherent_dma_mask < 0xffffffff) gfp |= GFP_DMA; #endif return (void *)vaddr; ===== drivers/eisa/eisa-bus.c 1.14 vs edited ===== --- 1.14/drivers/eisa/eisa-bus.c Sun Oct 5 03:07:57 2003 +++ edited/drivers/eisa/eisa-bus.c Wed Feb 25 14:58:57 2004 @@ -187,6 +187,7 @@ edev->dev.parent = root->dev; edev->dev.bus = &eisa_bus_type; edev->dev.dma_mask = &edev->dma_mask; + edev->dev.coherent_dma_mask = edev->dma_mask; sprintf (edev->dev.bus_id, "%02X:%02X", root->bus_nr, slot); for (i = 0; i < EISA_MAX_RESOURCES; i++) { ===== drivers/mca/mca-bus.c 1.5 vs edited ===== --- 1.5/drivers/mca/mca-bus.c Sun Aug 17 13:44:15 2003 +++ edited/drivers/mca/mca-bus.c Wed Feb 25 14:58:58 2004 @@ -106,6 +106,7 @@ sprintf (mca_dev->dev.bus_id, "%02d:%02X", bus, mca_dev->slot); mca_dev->dma_mask = mca_bus->default_dma_mask; mca_dev->dev.dma_mask = &mca_dev->dma_mask; + mca_dev->dev.coherent_dma_mask = mca_dev->dma_mask; if (device_register(&mca_dev->dev)) return 0; ===== drivers/pci/pci.c 1.61 vs edited ===== --- 1.61/drivers/pci/pci.c Tue Feb 10 12:01:13 2004 +++ edited/drivers/pci/pci.c Wed Feb 25 14:58:58 2004 @@ -691,7 +691,7 @@ if (!pci_dma_supported(dev, mask)) return -EIO; - dev->consistent_dma_mask = mask; + dev->dev.coherent_dma_mask = mask; return 0; } ===== drivers/pci/probe.c 1.59 vs edited ===== --- 1.59/drivers/pci/probe.c Wed Feb 18 21:42:58 2004 +++ edited/drivers/pci/probe.c Wed Feb 25 14:59:00 2004 @@ -566,7 +566,6 @@ /* Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer) set this higher, assuming the system even supports it. */ dev->dma_mask = 0xffffffff; - dev->consistent_dma_mask = 0xffffffff; if (pci_setup_device(dev) < 0) { kfree(dev); return NULL; @@ -578,6 +577,7 @@ pci_name_device(dev); dev->dev.dma_mask = &dev->dma_mask; + dev->dev.coherent_dma_mask = 0xffffffffull; return dev; } ===== include/linux/device.h 1.115 vs edited ===== --- 1.115/include/linux/device.h Mon Feb 9 17:40:25 2004 +++ edited/include/linux/device.h Wed Feb 25 14:59:35 2004 @@ -285,6 +285,12 @@ detached from its driver. */ u64 *dma_mask; /* dma mask (if dma'able device) */ + u64 coherent_dma_mask;/* Like dma_mask, but for + alloc_coherent mappings as + not all hardware supports + 64 bit addresses for consistent + allocations such descriptors. */ + struct list_head dma_pools; /* dma pools (if dma'ble) */ void (*release)(struct device * dev); ===== include/linux/pci.h 1.117 vs edited ===== --- 1.117/include/linux/pci.h Tue Feb 10 11:51:08 2004 +++ edited/include/linux/pci.h Wed Feb 25 14:59:03 2004 @@ -392,11 +392,6 @@ this if your device has broken DMA or supports 64-bit transfers. */ - u64 consistent_dma_mask;/* Like dma_mask, but for - pci_alloc_consistent mappings as - not all hardware supports - 64 bit addresses for consistent - allocations such descriptors. */ u32 current_state; /* Current operating state. In ACPI-speak, this is D0-D3, D0 being fully functional, and D3 being off. */ - 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/
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