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| author | Shannon Nelson <shannon.nelson@intel.com> | 2007-11-14 16:59:51 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-14 18:45:41 -0800 |
| commit | 7bb67c14fd3778504fb77da30ce11582336dfced (patch) | |
| tree | 24b65f267a98716824c7955be02af8879cfda688 /drivers/dma/ioat.c | |
| parent | cc9f2f8f68efcc73d8793a4df2c4c50196e90080 (diff) | |
| download | linux-3.10-7bb67c14fd3778504fb77da30ce11582336dfced.tar.gz linux-3.10-7bb67c14fd3778504fb77da30ce11582336dfced.tar.bz2 linux-3.10-7bb67c14fd3778504fb77da30ce11582336dfced.zip | |
I/OAT: Add support for version 2 of ioatdma device
Add support for version 2 of the ioatdma device. This device handles
the descriptor chain and DCA services slightly differently:
- Instead of moving the dma descriptors between a busy and an idle chain,
this new version uses a single circular chain so that we don't have
rewrite the next_descriptor pointers as we add new requests, and the
device doesn't need to re-read the last descriptor.
- The new device has the DCA tags defined internally instead of needing
them defined statically.
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/dma/ioat.c')
| -rw-r--r-- | drivers/dma/ioat.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/dma/ioat.c b/drivers/dma/ioat.c index f204c39fb41..16e0fd8facf 100644 --- a/drivers/dma/ioat.c +++ b/drivers/dma/ioat.c @@ -39,10 +39,14 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Intel Corporation"); static struct pci_device_id ioat_pci_tbl[] = { + /* I/OAT v1 platforms */ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) }, { PCI_DEVICE(PCI_VENDOR_ID_UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) }, + + /* I/OAT v2 platforms */ + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, { 0, } }; @@ -74,10 +78,17 @@ static int ioat_setup_functionality(struct pci_dev *pdev, void __iomem *iobase) if (device->dma && ioat_dca_enabled) device->dca = ioat_dca_init(pdev, iobase); break; + case IOAT_VER_2_0: + device->dma = ioat_dma_probe(pdev, iobase); + if (device->dma && ioat_dca_enabled) + device->dca = ioat2_dca_init(pdev, iobase); + break; default: err = -ENODEV; break; } + if (!device->dma) + err = -ENODEV; return err; } |