________________________________
From: Vidya Sagar Velumuri <vvelumuri@marvell.com>
Sent: Friday, April 19, 2024 2:37 PM
To: fengchengwen@huawei.com <fengchengwen@huawei.com>; kevin.laatz@intel.com <kevin.laatz@intel.com>; bruce.richardson@intel.com <bruce.richardson@intel.com>
Cc: Jerin Jacob <jerinj@marvell.com>; Anoob Joseph <anoobj@marvell.com>; Vidya Sagar Velumuri <vvelumuri@marvell.com>; Aakash Sasidharan <asasidharan@marvell.com>; Tejasree Kondoj <ktejasree@marvell.com>; Gowrishankar Muthukrishnan <gmuthukrishn@marvell.com>; dev@dpdk.org <dev@dpdk.org>
Subject: [EXTERNAL] [PATCH v2 1/2] test/dma: update the sg test to verify wrap around case

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----------------------------------------------------------------------
Run the sg test in a loop to verify wrap around case.
Total number commands submitted to be more than the number descriptors
allocated to verify the scenario.

Signed-off-by: Vidya Sagar Velumuri <vvelumuri@marvell.com>
diff --git a/app/test/test_dmadev.c b/app/test/test_dmadev.c
index 143e1bcd68..7462e90831 100644
--- a/app/test/test_dmadev.c
+++ b/app/test/test_dmadev.c
@@ -393,34 +393,26 @@ test_stop_start(int16_t dev_id, uint16_t vchan)
 }

 static int
-test_enqueue_sg_copies(int16_t dev_id, uint16_t vchan)
+test_enqueue_sg(int16_t dev_id, uint16_t vchan, unsigned int n_sge, unsigned int test_len)
 {
-       unsigned int src_len, dst_len, n_sge, len, i, j, k;
         char orig_src[COPY_LEN], orig_dst[COPY_LEN];
-       struct rte_dma_info info = { 0 };
+       unsigned int src_len, dst_len, i, j, k;
         enum rte_dma_status_code status;
         uint16_t id, n_src, n_dst;

-       if (rte_dma_info_get(dev_id, &info) < 0)
-               ERR_RETURN("Failed to get dev info");
-
-       if (info.max_sges < 2)
-               ERR_RETURN("Test needs minimum 2 SG pointers");
-
-       n_sge = info.max_sges;
-
         for (n_src = 1; n_src <= n_sge; n_src++) {
                 for (n_dst = 1; n_dst <= n_sge; n_dst++) {
                         /* Normalize SG buffer lengths */
-                       len = COPY_LEN;
-                       len -= (len % (n_src * n_dst));
-                       dst_len = len / n_dst;
-                       src_len = len / n_src;
-
+                       unsigned int len = test_len - (test_len % (n_src * n_dst));
                         struct rte_dma_sge sg_src[n_sge], sg_dst[n_sge];
                         struct rte_mbuf *src[n_sge], *dst[n_sge];
                         char *src_data[n_sge], *dst_data[n_sge];

+                       dst_len = len / n_dst;
+                       src_len = len / n_src;
+                       if (dst_len == 0 || src_len == 0)
+                               continue;
+
                         for (i = 0 ; i < len; i++)
                                 orig_src[i] = rte_rand() & 0xFF;

@@ -511,6 +503,27 @@ test_enqueue_sg_copies(int16_t dev_id, uint16_t vchan)
         return 0;
 }

+static int
+test_enqueue_sg_copies(int16_t dev_id, uint16_t vchan)
+{
+       struct rte_dma_info info = { 0 };
+       unsigned int n_sge, len;
+       int loop_count = 0;
+
+       if (rte_dma_info_get(dev_id, &info) < 0)
+               ERR_RETURN("Failed to get dev info");
+
+       n_sge = RTE_MIN(info.max_sges, TEST_SG_MAX);
+       len = COPY_LEN;
+
+       do {
+               test_enqueue_sg(dev_id, vchan, n_sge, len);
+               loop_count++;
+       } while (loop_count * n_sge * n_sge < TEST_RINGSIZE * 3);
+
+       return 0;
+}
+
 /* Failure handling test cases - global macros and variables for those tests*/
 #define COMP_BURST_SZ   16
 #define OPT_FENCE(idx) ((fence && idx == 8) ? RTE_DMA_OP_FLAG_FENCE : 0)
diff --git a/app/test/test_dmadev_api.c b/app/test/test_dmadev_api.c
index d40c05cfbf..6a07ed593b 100644
--- a/app/test/test_dmadev_api.c
+++ b/app/test/test_dmadev_api.c
@@ -16,7 +16,6 @@ extern int test_dma_api(uint16_t dev_id);

 #define TEST_MEMCPY_SIZE        1024
 #define TEST_WAIT_US_VAL        50000
-#define TEST_SG_MAX            64

 static int16_t test_dev_id;
 static int16_t invalid_dev_id;
diff --git a/app/test/test_dmadev_api.h b/app/test/test_dmadev_api.h
index 33fbc5bd41..a03f7acd4f 100644
--- a/app/test/test_dmadev_api.h
+++ b/app/test/test_dmadev_api.h
@@ -2,4 +2,6 @@
  * Copyright(c) 2021 HiSilicon Limited
  */

+#define TEST_SG_MAX            64
+
 int test_dma_api(uint16_t dev_id);
--
2.25.1

Acked-by: Amit Prakash Shukla <amitprakashs@marvell.com>

Thanks