xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ioatdma: channel reset scheme fixup on Intel Atom S1200 platforms

Browse Source 
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>
This commit is contained in:
Dave Jiang
2013-03-26 15:42:47 -07:00
committed by Vinod Koul
parent d92a8d7cbb
commit 8a52b9ff11
3 changed files with 171 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/dma/ioat/dma.h
View File

@@ -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;