[dpdk-dev] [PATCH v3 07/25] raw/ioat: rename functions to be operation-agnostic

[Bruce Richardson <bruce.richardson@intel.com>]

Since the hardware supported by the ioat driver is capable of operations
other than just copies, we can rename the doorbell and completion-return
functions to not have "copies" in their names. These functions are not
copy-specific, and so would apply for other operations which may be added
later to the driver.

Also add a suitable warning using deprecation attribute for any code using
the old functions names.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>

---
Note: The checkpatches warning on this patch is a false positive due to
the addition of the new __rte_deprecated_msg macro in rte_common.h
---
 doc/guides/rawdevs/ioat.rst            | 16 ++++++++--------
 doc/guides/rel_notes/release_20_11.rst |  9 +++++++++
 doc/guides/sample_app_ug/ioat.rst      |  8 ++++----
 drivers/raw/ioat/ioat_rawdev_test.c    | 12 ++++++------
 drivers/raw/ioat/rte_ioat_rawdev.h     | 14 +++++++-------
 drivers/raw/ioat/rte_ioat_rawdev_fns.h | 20 ++++++++++++++++----
 examples/ioat/ioatfwd.c                |  4 ++--
 lib/librte_eal/include/rte_common.h    |  1 +
 8 files changed, 53 insertions(+), 31 deletions(-)

diff --git a/doc/guides/rawdevs/ioat.rst b/doc/guides/rawdevs/ioat.rst
index af00d77fb..3db5f5d09 100644
--- a/doc/guides/rawdevs/ioat.rst
+++ b/doc/guides/rawdevs/ioat.rst
@@ -157,9 +157,9 @@ Performing Data Copies
 ~~~~~~~~~~~~~~~~~~~~~~~
 
 To perform data copies using IOAT rawdev devices, the functions
-``rte_ioat_enqueue_copy()`` and ``rte_ioat_do_copies()`` should be used.
+``rte_ioat_enqueue_copy()`` and ``rte_ioat_perform_ops()`` should be used.
 Once copies have been completed, the completion will be reported back when
-the application calls ``rte_ioat_completed_copies()``.
+the application calls ``rte_ioat_completed_ops()``.
 
 The ``rte_ioat_enqueue_copy()`` function enqueues a single copy to the
 device ring for copying at a later point. The parameters to that function
@@ -172,11 +172,11 @@ pointers if packet data is being copied.
 
 While the ``rte_ioat_enqueue_copy()`` function enqueues a copy operation on
 the device ring, the copy will not actually be performed until after the
-application calls the ``rte_ioat_do_copies()`` function. This function
+application calls the ``rte_ioat_perform_ops()`` function. This function
 informs the device hardware of the elements enqueued on the ring, and the
 device will begin to process them. It is expected that, for efficiency
 reasons, a burst of operations will be enqueued to the device via multiple
-enqueue calls between calls to the ``rte_ioat_do_copies()`` function.
+enqueue calls between calls to the ``rte_ioat_perform_ops()`` function.
 
 The following code from ``test_ioat_rawdev.c`` demonstrates how to enqueue
 a burst of copies to the device and start the hardware processing of them:
@@ -210,10 +210,10 @@ a burst of copies to the device and start the hardware processing of them:
                         return -1;
                 }
         }
-        rte_ioat_do_copies(dev_id);
+        rte_ioat_perform_ops(dev_id);
 
 To retrieve information about completed copies, the API
-``rte_ioat_completed_copies()`` should be used. This API will return to the
+``rte_ioat_completed_ops()`` should be used. This API will return to the
 application a set of completion handles passed in when the relevant copies
 were enqueued.
 
@@ -223,9 +223,9 @@ is correct before freeing the data buffers using the returned handles:
 
 .. code-block:: C
 
-        if (rte_ioat_completed_copies(dev_id, 64, (void *)completed_src,
+        if (rte_ioat_completed_ops(dev_id, 64, (void *)completed_src,
                         (void *)completed_dst) != RTE_DIM(srcs)) {
-                printf("Error with rte_ioat_completed_copies\n");
+                printf("Error with rte_ioat_completed_ops\n");
                 return -1;
         }
         for (i = 0; i < RTE_DIM(srcs); i++) {
diff --git a/doc/guides/rel_notes/release_20_11.rst b/doc/guides/rel_notes/release_20_11.rst
index 196209f63..c99c0b33f 100644
--- a/doc/guides/rel_notes/release_20_11.rst
+++ b/doc/guides/rel_notes/release_20_11.rst
@@ -83,6 +83,11 @@ New Features
   The ioat rawdev driver has been updated and enhanced. Changes include:
 
   * Added a per-device configuration flag to disable management of user-provided completion handles
+  * Renamed the ``rte_ioat_do_copies()`` API to ``rte_ioat_perform_ops()``,
+    and renamed the ``rte_ioat_completed_copies()`` API to ``rte_ioat_completed_ops()``
+    to better reflect the APIs' purposes, and remove the implication that
+    they are limited to copy operations only.
+    [Note: The old API is still provided but marked as deprecated in the code]
 
 
 Removed Items
@@ -178,6 +183,10 @@ API Changes
 
 * bpf: ``RTE_BPF_XTYPE_NUM`` has been dropped from ``rte_bpf_xtype``.
 
+* raw/ioat: As noted above, the ``rte_ioat_do_copies()`` and
+  ``rte_ioat_completed_copies()`` functions have been renamed to
+  ``rte_ioat_perform_ops()`` and ``rte_ioat_completed_ops()`` respectively.
+
 
 ABI Changes
 -----------
diff --git a/doc/guides/sample_app_ug/ioat.rst b/doc/guides/sample_app_ug/ioat.rst
index 3f7d5c34a..964160dff 100644
--- a/doc/guides/sample_app_ug/ioat.rst
+++ b/doc/guides/sample_app_ug/ioat.rst
@@ -394,7 +394,7 @@ packet using ``pktmbuf_sw_copy()`` function and enqueue them to an rte_ring:
                 nb_enq = ioat_enqueue_packets(pkts_burst,
                     nb_rx, rx_config->ioat_ids[i]);
                 if (nb_enq > 0)
-                    rte_ioat_do_copies(rx_config->ioat_ids[i]);
+                    rte_ioat_perform_ops(rx_config->ioat_ids[i]);
             } else {
                 /* Perform packet software copy, free source packets */
                 int ret;
@@ -433,7 +433,7 @@ The packets are received in burst mode using ``rte_eth_rx_burst()``
 function. When using hardware copy mode the packets are enqueued in
 copying device's buffer using ``ioat_enqueue_packets()`` which calls
 ``rte_ioat_enqueue_copy()``. When all received packets are in the
-buffer the copy operations are started by calling ``rte_ioat_do_copies()``.
+buffer the copy operations are started by calling ``rte_ioat_perform_ops()``.
 Function ``rte_ioat_enqueue_copy()`` operates on physical address of
 the packet. Structure ``rte_mbuf`` contains only physical address to
 start of the data buffer (``buf_iova``). Thus the address is adjusted
@@ -490,7 +490,7 @@ or indirect mbufs, then multiple copy operations must be used.
 
 
 All completed copies are processed by ``ioat_tx_port()`` function. When using
-hardware copy mode the function invokes ``rte_ioat_completed_copies()``
+hardware copy mode the function invokes ``rte_ioat_completed_ops()``
 on each assigned IOAT channel to gather copied packets. If software copy
 mode is used the function dequeues copied packets from the rte_ring. Then each
 packet MAC address is changed if it was enabled. After that copies are sent
@@ -510,7 +510,7 @@ in burst mode using `` rte_eth_tx_burst()``.
         for (i = 0; i < tx_config->nb_queues; i++) {
             if (copy_mode == COPY_MODE_IOAT_NUM) {
                 /* Deque the mbufs from IOAT device. */
-                nb_dq = rte_ioat_completed_copies(
+                nb_dq = rte_ioat_completed_ops(
                     tx_config->ioat_ids[i], MAX_PKT_BURST,
                     (void *)mbufs_src, (void *)mbufs_dst);
             } else {
diff --git a/drivers/raw/ioat/ioat_rawdev_test.c b/drivers/raw/ioat/ioat_rawdev_test.c
index 8e7fd96af..bb40eab6b 100644
--- a/drivers/raw/ioat/ioat_rawdev_test.c
+++ b/drivers/raw/ioat/ioat_rawdev_test.c
@@ -62,12 +62,12 @@ test_enqueue_copies(int dev_id)
 			PRINT_ERR("Error with rte_ioat_enqueue_copy\n");
 			return -1;
 		}
-		rte_ioat_do_copies(dev_id);
+		rte_ioat_perform_ops(dev_id);
 		usleep(10);
 
-		if (rte_ioat_completed_copies(dev_id, 1, (void *)&completed[0],
+		if (rte_ioat_completed_ops(dev_id, 1, (void *)&completed[0],
 				(void *)&completed[1]) != 1) {
-			PRINT_ERR("Error with rte_ioat_completed_copies\n");
+			PRINT_ERR("Error with rte_ioat_completed_ops\n");
 			return -1;
 		}
 		if (completed[0] != src || completed[1] != dst) {
@@ -116,12 +116,12 @@ test_enqueue_copies(int dev_id)
 				return -1;
 			}
 		}
-		rte_ioat_do_copies(dev_id);
+		rte_ioat_perform_ops(dev_id);
 		usleep(100);
 
-		if (rte_ioat_completed_copies(dev_id, 64, (void *)completed_src,
+		if (rte_ioat_completed_ops(dev_id, 64, (void *)completed_src,
 				(void *)completed_dst) != RTE_DIM(srcs)) {
-			PRINT_ERR("Error with rte_ioat_completed_copies\n");
+			PRINT_ERR("Error with rte_ioat_completed_ops\n");
 			return -1;
 		}
 		for (i = 0; i < RTE_DIM(srcs); i++) {
diff --git a/drivers/raw/ioat/rte_ioat_rawdev.h b/drivers/raw/ioat/rte_ioat_rawdev.h
index 7067b352f..5b2c47e8c 100644
--- a/drivers/raw/ioat/rte_ioat_rawdev.h
+++ b/drivers/raw/ioat/rte_ioat_rawdev.h
@@ -74,19 +74,19 @@ rte_ioat_enqueue_copy(int dev_id, phys_addr_t src, phys_addr_t dst,
 		int fence);
 
 /**
- * Trigger hardware to begin performing enqueued copy operations
+ * Trigger hardware to begin performing enqueued operations
  *
  * This API is used to write the "doorbell" to the hardware to trigger it
- * to begin the copy operations previously enqueued by rte_ioat_enqueue_copy()
+ * to begin the operations previously enqueued by rte_ioat_enqueue_copy()
  *
  * @param dev_id
  *   The rawdev device id of the ioat instance
  */
 static inline void
-rte_ioat_do_copies(int dev_id);
+rte_ioat_perform_ops(int dev_id);
 
 /**
- * Returns details of copy operations that have been completed
+ * Returns details of operations that have been completed
  *
  * If the hdls_disable option was not set when the device was configured,
  * the function will return to the caller the user-provided "handles" for
@@ -104,11 +104,11 @@ rte_ioat_do_copies(int dev_id);
  *   NOTE: If hdls_disable configuration option for the device is set, this
  *   parameter is ignored.
  * @param src_hdls
- *   Array to hold the source handle parameters of the completed copies.
+ *   Array to hold the source handle parameters of the completed ops.
  *   NOTE: If hdls_disable configuration option for the device is set, this
  *   parameter is ignored.
  * @param dst_hdls
- *   Array to hold the destination handle parameters of the completed copies.
+ *   Array to hold the destination handle parameters of the completed ops.
  *   NOTE: If hdls_disable configuration option for the device is set, this
  *   parameter is ignored.
  * @return
@@ -117,7 +117,7 @@ rte_ioat_do_copies(int dev_id);
  *   to the src_hdls and dst_hdls array parameters.
  */
 static inline int
-rte_ioat_completed_copies(int dev_id, uint8_t max_copies,
+rte_ioat_completed_ops(int dev_id, uint8_t max_copies,
 		uintptr_t *src_hdls, uintptr_t *dst_hdls);
 
 /* include the implementation details from a separate file */
diff --git a/drivers/raw/ioat/rte_ioat_rawdev_fns.h b/drivers/raw/ioat/rte_ioat_rawdev_fns.h
index 4b7bdb8e2..b155d79c4 100644
--- a/drivers/raw/ioat/rte_ioat_rawdev_fns.h
+++ b/drivers/raw/ioat/rte_ioat_rawdev_fns.h
@@ -83,10 +83,10 @@ rte_ioat_enqueue_copy(int dev_id, phys_addr_t src, phys_addr_t dst,
 }
 
 /*
- * Trigger hardware to begin performing enqueued copy operations
+ * Trigger hardware to begin performing enqueued operations
  */
 static inline void
-rte_ioat_do_copies(int dev_id)
+rte_ioat_perform_ops(int dev_id)
 {
 	struct rte_ioat_rawdev *ioat =
 			(struct rte_ioat_rawdev *)rte_rawdevs[dev_id].dev_private;
@@ -114,10 +114,10 @@ rte_ioat_get_last_completed(struct rte_ioat_rawdev *ioat, int *error)
 }
 
 /*
- * Returns details of copy operations that have been completed
+ * Returns details of operations that have been completed
  */
 static inline int
-rte_ioat_completed_copies(int dev_id, uint8_t max_copies,
+rte_ioat_completed_ops(int dev_id, uint8_t max_copies,
 		uintptr_t *src_hdls, uintptr_t *dst_hdls)
 {
 	struct rte_ioat_rawdev *ioat =
@@ -165,4 +165,16 @@ rte_ioat_completed_copies(int dev_id, uint8_t max_copies,
 	return count;
 }
 
+static inline void
+__rte_deprecated_msg("use rte_ioat_perform_ops() instead")
+rte_ioat_do_copies(int dev_id) { rte_ioat_perform_ops(dev_id); }
+
+static inline int
+__rte_deprecated_msg("use rte_ioat_completed_ops() instead")
+rte_ioat_completed_copies(int dev_id, uint8_t max_copies,
+		uintptr_t *src_hdls, uintptr_t *dst_hdls)
+{
+	return rte_ioat_completed_ops(dev_id, max_copies, src_hdls, dst_hdls);
+}
+
 #endif /* _RTE_IOAT_RAWDEV_FNS_H_ */
diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c
index 288a75c7b..67f75737b 100644
--- a/examples/ioat/ioatfwd.c
+++ b/examples/ioat/ioatfwd.c
@@ -406,7 +406,7 @@ ioat_rx_port(struct rxtx_port_config *rx_config)
 			nb_enq = ioat_enqueue_packets(pkts_burst,
 				nb_rx, rx_config->ioat_ids[i]);
 			if (nb_enq > 0)
-				rte_ioat_do_copies(rx_config->ioat_ids[i]);
+				rte_ioat_perform_ops(rx_config->ioat_ids[i]);
 		} else {
 			/* Perform packet software copy, free source packets */
 			int ret;
@@ -452,7 +452,7 @@ ioat_tx_port(struct rxtx_port_config *tx_config)
 	for (i = 0; i < tx_config->nb_queues; i++) {
 		if (copy_mode == COPY_MODE_IOAT_NUM) {
 			/* Deque the mbufs from IOAT device. */
-			nb_dq = rte_ioat_completed_copies(
+			nb_dq = rte_ioat_completed_ops(
 				tx_config->ioat_ids[i], MAX_PKT_BURST,
 				(void *)mbufs_src, (void *)mbufs_dst);
 		} else {
diff --git a/lib/librte_eal/include/rte_common.h b/lib/librte_eal/include/rte_common.h
index 8f487a563..2920255fc 100644
--- a/lib/librte_eal/include/rte_common.h
+++ b/lib/librte_eal/include/rte_common.h
@@ -85,6 +85,7 @@ typedef uint16_t unaligned_uint16_t;
 
 /******* Macro to mark functions and fields scheduled for removal *****/
 #define __rte_deprecated	__attribute__((__deprecated__))
+#define __rte_deprecated_msg(msg)	__attribute__((__deprecated__(msg)))
 
 /**
  * Mark a function or variable to a weak reference.
-- 
2.25.1