On 21/08/2020 17:29, Bruce Richardson wrote:

Rather than having a single long complicated header file for general use we
can split things so that there is one header with all the publically needed
information - data structs and function prototypes - while the rest of the
internal details are put separately. This makes it easier to read,
understand and use the APIs.

Signed-off-by: Bruce Richardson <redacted>
---

There are a couple of checkpatch errors about spacing in this patch,
however, it appears that these are false positives.
---
  drivers/raw/ioat/meson.build           |   1 +
  drivers/raw/ioat/rte_ioat_rawdev.h     | 144 +---------------------
  drivers/raw/ioat/rte_ioat_rawdev_fns.h | 164 +++++++++++++++++++++++++
  3 files changed, 171 insertions(+), 138 deletions(-)
  create mode 100644 drivers/raw/ioat/rte_ioat_rawdev_fns.h

<snip>

This assignment needs to be type cast to "struct rte_ioat_rawdev *" for 
C++ compilation compatibility.

There are a number of occurrences of this in this patch.

-	unsigned short read = ioat->next_read;
-	unsigned short write = ioat->next_write;
-	unsigned short mask = ioat->ring_size - 1;
-	unsigned short space = mask + read - write;
-	struct rte_ioat_generic_hw_desc *desc;
-
-	if (space == 0) {
-		ioat->enqueue_failed++;
-		return 0;
-	}
-
-	ioat->next_write = write + 1;
-	write &= mask;
-
-	desc = &ioat->desc_ring[write];
-	desc->size = length;
-	/* set descriptor write-back every 16th descriptor */
-	desc->u.control_raw = (uint32_t)((!!fence << 4) | (!(write & 0xF)) << 3);
-	desc->src_addr = src;
-	desc->dest_addr = dst;
-	if (!ioat->hdls_disable)
-		ioat->hdls[write] = _mm_set_epi64x((int64_t)dst_hdl,
-					(int64_t)src_hdl);
-
-	rte_prefetch0(&ioat->desc_ring[ioat->next_write & mask]);
-
-	ioat->enqueued++;
-	return 1;
-}
+		int fence);
  

<snip>

+/**
+ * Returns details of copy operations that have been completed
+ */
+static inline int
+rte_ioat_completed_copies(int dev_id, uint8_t max_copies,
+		uintptr_t *src_hdls, uintptr_t *dst_hdls)
+{
+	struct rte_ioat_rawdev *ioat = rte_rawdevs[dev_id].dev_private;
+	unsigned short mask = (ioat->ring_size - 1);
+	unsigned short read = ioat->next_read;
+	unsigned short end_read, count;
+	int error;
+	int i = 0;
+
+	end_read = (rte_ioat_get_last_completed(ioat, &error) + 1) & mask;
+	count = (end_read - (read & mask)) & mask;
+
+	if (error) {
+		rte_errno = EIO;
+		return -1;
+	}
+
+	if (ioat->hdls_disable) {
+		read += count;
+		goto end;
+	}
+
+	if (count > max_copies)
+		count = max_copies;
+
+	for (; i < count - 1; i += 2, read += 2) {
+		__m128i hdls0 = _mm_load_si128(&ioat->hdls[read & mask]);
+		__m128i hdls1 = _mm_load_si128(&ioat->hdls[(read + 1) & mask]);
+
+		_mm_storeu_si128((void *)&src_hdls[i],
+				_mm_unpacklo_epi64(hdls0, hdls1));
+		_mm_storeu_si128((void *)&dst_hdls[i],
+				_mm_unpackhi_epi64(hdls0, hdls1));

"src_hdls" and "dst_hdls" need to be type cast to "__m128i *" here for 
C++ compatibility.

+	}
+	for (; i < count; i++, read++) {
+		uintptr_t *hdls = (void *)&ioat->hdls[read & mask];

Type cast for "ioat->hdls" to "__m128i *" needed here for C++ compatibility.

+		src_hdls[i] = hdls[0];
+		dst_hdls[i] = hdls[1];
+	}
+
+end:
+	ioat->next_read = read;
+	ioat->completed += count;
+	return count;
+}
+
+#endif /* _RTE_IOAT_RAWDEV_FNS_H_ */

Thanks,
Kevin