The patch titled
I/OAT: Add completion callback for async_tx interface use
has been added to the -mm tree. Its filename is
i-oat-add-completion-callback-for-async_tx-interface-use.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: I/OAT: Add completion callback for async_tx interface use
From: Shannon Nelson <shannon.nelson@xxxxxxxxx>
The async_tx interface includes a completion callback. This adds support
for using that callback, including using interrupts on completion.
Signed-off-by: Shannon Nelson <shannon.nelson@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/dma/ioat_dma.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff -puN drivers/dma/ioat_dma.c~i-oat-add-completion-callback-for-async_tx-interface-use drivers/dma/ioat_dma.c
--- a/drivers/dma/ioat_dma.c~i-oat-add-completion-callback-for-async_tx-interface-use
+++ a/drivers/dma/ioat_dma.c
@@ -212,6 +212,18 @@ static dma_cookie_t ioat_tx_submit(struc
} while (len && (new = ioat_dma_get_next_descriptor(ioat_chan)));
hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
+ if (new->async_tx.callback) {
+ hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
+ if (first != new) {
+ /* move callback into to last desc */
+ new->async_tx.callback = first->async_tx.callback;
+ new->async_tx.callback_param
+ = first->async_tx.callback_param;
+ first->async_tx.callback = NULL;
+ first->async_tx.callback_param = NULL;
+ }
+ }
+
new->tx_cnt = desc_count;
new->async_tx.ack = orig_ack; /* client is in control of this ack */
@@ -516,6 +528,11 @@ static void ioat_dma_memcpy_cleanup(stru
pci_unmap_addr(desc, src),
pci_unmap_len(desc, len),
PCI_DMA_TODEVICE);
+ if (desc->async_tx.callback) {
+ desc->async_tx.callback(
+ desc->async_tx.callback_param);
+ desc->async_tx.callback = NULL;
+ }
}
if (desc->async_tx.phys != phys_complete) {
@@ -637,6 +654,13 @@ static void ioat_dma_start_null_desc(str
*/
#define IOAT_TEST_SIZE 2000
+static dma_async_tx_callback ioat_dma_test_callback(void *dma_async_param)
+{
+ printk(KERN_ERR "ioatdma: ioat_dma_test_callback(0x%04llx)\n",
+ (u64)dma_async_param);
+ return 0;
+}
+
/**
* ioat_dma_self_test - Perform a IOAT transaction to verify the HW works.
* @device: device to be tested
@@ -691,6 +715,8 @@ static int ioat_dma_self_test(struct ioa
addr = dma_map_single(dma_chan->device->dev, dest, IOAT_TEST_SIZE,
DMA_FROM_DEVICE);
ioat_set_dest(addr, tx, 0);
+ tx->callback = (void *)ioat_dma_test_callback;
+ tx->callback_param = (void *)0x8086;
cookie = ioat_tx_submit(tx);
if (cookie < 0) {
dev_err(&device->pdev->dev,
_
Patches currently in -mm which might be from shannon.nelson@xxxxxxxxx are
origin.patch
remove-unsafe-from-module-struct.patch
i-oat-cleanup-pci-issues.patch
i-oat-clean-up-of-dca-provider-start-and-stop.patch
i-oat-clean-up-error-handling-and-some-print-messages.patch
i-oat-tighten-descriptor-setup-performance.patch
i-oat-add-completion-callback-for-async_tx-interface-use.patch
i-oat-add-completion-callback-for-async_tx-interface-use-fix.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
