[src/trunk]: src/sys/arch/arm/sunxi Reduce some duplicated bus_dma clutter.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/83b31f947ce0
branches:  trunk
changeset: 466022:83b31f947ce0
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Dec 09 14:55:52 2019 +0000

description:
Reduce some duplicated bus_dma clutter.

diffstat:

 sys/arch/arm/sunxi/sun8i_crypto.c |  60 +++++++++-----------------------------
 1 files changed, 15 insertions(+), 45 deletions(-)

diffs (127 lines):

diff -r be8fc120871d -r 83b31f947ce0 sys/arch/arm/sunxi/sun8i_crypto.c
--- a/sys/arch/arm/sunxi/sun8i_crypto.c Mon Dec 09 04:51:03 2019 +0000
+++ b/sys/arch/arm/sunxi/sun8i_crypto.c Mon Dec 09 14:55:52 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sun8i_crypto.c,v 1.1 2019/12/09 04:51:03 riastradh Exp $       */
+/*     $NetBSD: sun8i_crypto.c,v 1.2 2019/12/09 14:55:52 riastradh Exp $       */
 
 /*-
  * Copyright (c) 2019 The NetBSD Foundation, Inc.
@@ -43,7 +43,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(1, "$NetBSD: sun8i_crypto.c,v 1.1 2019/12/09 04:51:03 riastradh Exp $");
+__KERNEL_RCSID(1, "$NetBSD: sun8i_crypto.c,v 1.2 2019/12/09 14:55:52 riastradh Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -115,10 +115,7 @@
 };
 
 struct sun8i_crypto_task {
-       bus_dma_segment_t       ct_desc_seg[1];
-       int                     ct_desc_nseg;
-       bus_dmamap_t            ct_desc_map;
-       void                    *ct_desc_kva;
+       struct sun8i_crypto_buf ct_buf;
        struct sun8i_crypto_taskdesc *ct_desc;
        void                    (*ct_callback)(struct sun8i_crypto_softc *,
                                    struct sun8i_crypto_task *, void *, int);
@@ -329,48 +326,25 @@
     void *cookie)
 {
        struct sun8i_crypto_task *task;
-       const size_t desc_size = sizeof(*task->ct_desc);
        int error;
 
+       /* Allocate a task.  */
        task = kmem_zalloc(sizeof(*task), KM_SLEEP);
 
-       /* Allocate DMA-safe memory for the descriptor.  */
-       error = bus_dmamem_alloc(sc->sc_dmat, desc_size, 0, 0,
-           task->ct_desc_seg, __arraycount(task->ct_desc_seg),
-           &task->ct_desc_nseg, BUS_DMA_NOWAIT);
+       /* Allocate a buffer for the descriptor.  */
+       error = sun8i_crypto_allocbuf(sc, sizeof(*task->ct_desc),
+           &task->ct_buf);
        if (error)
                goto fail0;
 
-       /* Map the descriptor into kernel virtual address space.  */
-       error = bus_dmamem_map(sc->sc_dmat, task->ct_desc_seg,
-           task->ct_desc_nseg, desc_size, &task->ct_desc_kva, BUS_DMA_NOWAIT);
-       if (error)
-               goto fail1;
-       task->ct_desc = task->ct_desc_kva;
-
-       /* Create a map for exposing the descriptor to DMA.  */
-       error = bus_dmamap_create(sc->sc_dmat, desc_size, 1, desc_size, 0,
-           BUS_DMA_NOWAIT, &task->ct_desc_map);
-       if (error)
-               goto fail2;
-
-       /* Load the descriptor into the DMA map.  */
-       error = bus_dmamap_load(sc->sc_dmat, task->ct_desc_map,
-           task->ct_desc_kva, desc_size, NULL, BUS_DMA_NOWAIT);
-       if (error)
-               goto fail3;
-
+       /* Initialize the task object and return it.  */
+       task->ct_desc = task->ct_buf.cb_kva;
        task->ct_callback = callback;
        task->ct_cookie = cookie;
-
        return task;
 
-fail4: __unused
-       bus_dmamap_unload(sc->sc_dmat, task->ct_desc_map);
-fail3: bus_dmamap_destroy(sc->sc_dmat, task->ct_desc_map);
-fail2: bus_dmamem_unmap(sc->sc_dmat, task->ct_desc_kva,
-           sizeof(*task->ct_desc));
-fail1: bus_dmamem_free(sc->sc_dmat, task->ct_desc_seg, task->ct_desc_nseg);
+fail1: __unused
+       sun8i_crypto_freebuf(sc, sizeof(*task->ct_desc), &task->ct_buf);
 fail0: kmem_free(task, sizeof(*task));
        return NULL;
 }
@@ -380,11 +354,7 @@
     struct sun8i_crypto_task *task)
 {
 
-       bus_dmamap_unload(sc->sc_dmat, task->ct_desc_map);
-       bus_dmamap_destroy(sc->sc_dmat, task->ct_desc_map);
-       bus_dmamem_unmap(sc->sc_dmat, task->ct_desc_kva,
-           sizeof(*task->ct_desc));
-       bus_dmamem_free(sc->sc_dmat, task->ct_desc_seg, task->ct_desc_nseg);
+       sun8i_crypto_freebuf(sc, sizeof(*task->ct_desc), &task->ct_buf);
        kmem_free(task, sizeof(*task));
 }
 
@@ -604,7 +574,7 @@
        task->ct_desc->td_cid = htole32(i);
 
        /* Prepare to send the descriptor to the device by DMA.  */
-       bus_dmamap_sync(sc->sc_dmat, task->ct_desc_map, 0,
+       bus_dmamap_sync(sc->sc_dmat, task->ct_buf.cb_map, 0,
            sizeof(*task->ct_desc), BUS_DMASYNC_PREWRITE);
 
        /* Confirm we're ready to go.  */
@@ -622,7 +592,7 @@
 
        /* Set the task descriptor queue address.  */
        sun8i_crypto_write(sc, SUN8I_CRYPTO_TDQ,
-           task->ct_desc_map->dm_segs[0].ds_addr);
+           task->ct_buf.cb_map->dm_segs[0].ds_addr);
 
        /* Notify the engine to load it, and wait for acknowledgement.  */
        sun8i_crypto_write(sc, SUN8I_CRYPTO_TLR, SUN8I_CRYPTO_TLR_LOAD);
@@ -819,7 +789,7 @@
        sun8i_crypto_write(sc, SUN8I_CRYPTO_ICR, icr);
 
        /* Finished sending the descriptor to the device by DMA.  */
-       bus_dmamap_sync(sc->sc_dmat, task->ct_desc_map, 0,
+       bus_dmamap_sync(sc->sc_dmat, task->ct_buf.cb_map, 0,
            sizeof(*task->ct_desc), BUS_DMASYNC_POSTWRITE);
 
        /* Temporarily release the lock to invoke the callback.  */