[PATCH 09/17] soc/qman: test: Don't use dummy platform device for dma mapping

[Claudiu Manoil]

Replace dummy platform device hack with a reference to a portal's
platform device, in order to dma map the test frame for this
small unit test.  The 2 qman symbols need to be exported because
this self test is a kernel module.

Signed-off-by: Claudiu Manoil <claudiu.man...@nxp.com>
---
 drivers/soc/fsl/qbman/qman.c            |  1 +
 drivers/soc/fsl/qbman/qman_portal.c     |  1 +
 drivers/soc/fsl/qbman/qman_test_stash.c | 31 ++++++++++++++++++++-----------
 3 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index a0020d2..283c2d3 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -2711,6 +2711,7 @@ const struct qm_portal_config *qman_get_qm_portal_config(
 {
        return portal->config;
 }
+EXPORT_SYMBOL(qman_get_qm_portal_config);
 
 struct gen_pool *qm_fqalloc; /* FQID allocator */
 struct gen_pool *qm_qpalloc; /* pool-channel allocator */
diff --git a/drivers/soc/fsl/qbman/qman_portal.c 
b/drivers/soc/fsl/qbman/qman_portal.c
index e6da2ea..c9a9bcb 100644
--- a/drivers/soc/fsl/qbman/qman_portal.c
+++ b/drivers/soc/fsl/qbman/qman_portal.c
@@ -31,6 +31,7 @@
 #include "qman_priv.h"
 
 struct qman_portal *qman_dma_portal;
+EXPORT_SYMBOL(qman_dma_portal);
 
 /* Enable portal interupts (as opposed to polling mode) */
 #define CONFIG_FSL_DPA_PIRQ_SLOW  1
diff --git a/drivers/soc/fsl/qbman/qman_test_stash.c 
b/drivers/soc/fsl/qbman/qman_test_stash.c
index 43cf66b..f8d25fa 100644
--- a/drivers/soc/fsl/qbman/qman_test_stash.c
+++ b/drivers/soc/fsl/qbman/qman_test_stash.c
@@ -191,6 +191,9 @@ struct hp_cpu {
 static u32 *frame_ptr;
 static dma_addr_t frame_dma;
 
+/* needed for dma_map*() */
+static const struct qm_portal_config *pcfg;
+
 /* the main function waits on this */
 static DECLARE_WAIT_QUEUE_HEAD(queue);
 
@@ -210,16 +213,14 @@ static int allocate_frame_data(void)
 {
        u32 lfsr = HP_FIRST_WORD;
        int loop;
-       struct platform_device *pdev = platform_device_alloc("foobar", -1);
 
-       if (!pdev) {
-               pr_crit("platform_device_alloc() failed");
-               return -EIO;
-       }
-       if (platform_device_add(pdev)) {
-               pr_crit("platform_device_add() failed");
+       if (!qman_dma_portal) {
+               pr_crit("portal not available\n");
                return -EIO;
        }
+
+       pcfg = qman_get_qm_portal_config(qman_dma_portal);
+
        __frame_ptr = kmalloc(4 * HP_NUM_WORDS, GFP_KERNEL);
        if (!__frame_ptr)
                return -ENOMEM;
@@ -229,15 +230,22 @@ static int allocate_frame_data(void)
                frame_ptr[loop] = lfsr;
                lfsr = do_lfsr(lfsr);
        }
-       frame_dma = dma_map_single(&pdev->dev, frame_ptr, 4 * HP_NUM_WORDS,
+
+       frame_dma = dma_map_single(pcfg->dev, frame_ptr, 4 * HP_NUM_WORDS,
                                   DMA_BIDIRECTIONAL);
-       platform_device_del(pdev);
-       platform_device_put(pdev);
+       if (dma_mapping_error(pcfg->dev, frame_dma)) {
+               pr_crit("dma mapping failure\n");
+               kfree(__frame_ptr);
+               return -EIO;
+       }
+
        return 0;
 }
 
 static void deallocate_frame_data(void)
 {
+       dma_unmap_single(pcfg->dev, frame_dma, 4 * HP_NUM_WORDS,
+                        DMA_BIDIRECTIONAL);
        kfree(__frame_ptr);
 }
 
@@ -249,7 +257,8 @@ static inline int process_frame_data(struct hp_handler 
*handler,
        int loop;
 
        if (qm_fd_addr_get64(fd) != handler->addr) {
-               pr_crit("bad frame address");
+               pr_crit("bad frame address, [%llX != %llX]\n",
+                       qm_fd_addr_get64(fd), handler->addr);
                return -EIO;
        }
        for (loop = 0; loop < HP_NUM_WORDS; loop++, p++) {
-- 
1.7.11.7