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| author |   Dave Jiang <dave.jiang@intel.com> | 2013-03-26 15:42:47 -0700 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2013-04-15 09:51:20 +0530 |
| commit | 8a52b9ff1154a68b6a2a8da9a31a87e52f5f6418 (patch) | |
| tree | 54fcb19bbcd64cf50a86efe4feeac899b32fd40b /drivers/dma/ioat/dma.h | |
| parent | ioatdma: Add 64bit chansts register read for ioat v3.3. (diff) | |
| download | linux-dev-8a52b9ff1154a68b6a2a8da9a31a87e52f5f6418.tar.xz linux-dev-8a52b9ff1154a68b6a2a8da9a31a87e52f5f6418.zip | |
ioatdma: channel reset scheme fixup on Intel Atom S1200 platforms
The Intel Atom S1200 family ioatdma changed the channel reset behavior.
It does a reset similar to PCI FLR by resetting all the MSIX
registers. We have to re-init msix interrupts because of this. This
workaround is only specific to this platform and is not expected to carry
over to the later generations.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/ioat/dma.h')
| -rw-r--r-- | drivers/dma/ioat/dma.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index 9285caadf825..b16902cd2684 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -48,6 +48,14 @@ */ #define NULL_DESC_BUFFER_SIZE 1 +enum ioat_irq_mode { + IOAT_NOIRQ = 0, + IOAT_MSIX, + IOAT_MSIX_SINGLE, + IOAT_MSI, + IOAT_INTX +}; + /** * struct ioatdma_device - internal representation of a IOAT device * @pdev: PCI-Express device @@ -77,6 +85,7 @@ struct ioatdma_device { struct msix_entry msix_entries[4]; struct ioat_chan_common *idx[4]; struct dca_provider *dca; + enum ioat_irq_mode irq_mode; void (*intr_quirk)(struct ioatdma_device *device); int (*enumerate_channels)(struct ioatdma_device *device); int (*reset_hw)(struct ioat_chan_common *chan); @@ -341,6 +350,7 @@ bool ioat_cleanup_preamble(struct ioat_chan_common *chan, dma_addr_t *phys_complete); void ioat_kobject_add(struct ioatdma_device *device, struct kobj_type *type); void ioat_kobject_del(struct ioatdma_device *device); +int ioat_dma_setup_interrupts(struct ioatdma_device *device); extern const struct sysfs_ops ioat_sysfs_ops; extern struct ioat_sysfs_entry ioat_version_attr; extern struct ioat_sysfs_entry ioat_cap_attr; |