1 files changed, 233 insertions, 0 deletions
diff --git a/sys/dev/firewire/fwdma.c b/sys/dev/firewire/fwdma.c
new file mode 100644
index 000000000000..afb1a09b1155
--- /dev/null
+++ b/sys/dev/firewire/fwdma.c
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2003
+ * 	Hidetoshi Shimokawa. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *
+ *	This product includes software developed by Hidetoshi Shimokawa.
+ *
+ * 4. Neither the name of the author nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ */
+
+#ifdef __FreeBSD__
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/types.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#if defined(__FreeBSD__) && __FreeBSD_version >= 501102 
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#endif
+
+#include <sys/bus.h>
+#include <machine/bus.h>
+
+#ifdef __DragonFly__
+#include <bus/firewire/firewire.h>
+#include <bus/firewire/firewirereg.h>
+#include <bus/firewire/fwdma.h>
+#else
+#include <dev/firewire/firewire.h>
+#include <dev/firewire/firewirereg.h>
+#include <dev/firewire/fwdma.h>
+#endif
+
+static void
+fwdma_map_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+	bus_addr_t *baddr;
+
+	if (error)
+		printf("fwdma_map_cb: error=%d\n", error);
+	baddr = (bus_addr_t *)arg;
+	*baddr = segs->ds_addr;
+}
+
+void *
+fwdma_malloc(struct firewire_comm *fc, int alignment, bus_size_t size,
+	struct fwdma_alloc *dma, int flag)
+{
+	int err;
+
+	dma->v_addr = NULL;
+	err = bus_dma_tag_create(
+		/*parent*/ fc->dmat,
+		/*alignment*/ alignment,
+		/*boundary*/ 0,
+		/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
+		/*highaddr*/ BUS_SPACE_MAXADDR,
+		/*filter*/NULL, /*filterarg*/NULL,
+		/*maxsize*/ size,
+		/*nsegments*/ 1,
+		/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
+		/*flags*/ BUS_DMA_ALLOCNOW,
+#if defined(__FreeBSD__) && __FreeBSD_version >= 501102 
+		/*lockfunc*/busdma_lock_mutex,
+		/*lockarg*/&Giant,
+#endif
+		&dma->dma_tag);
+	if (err) {
+		printf("fwdma_malloc: failed(1)\n");
+		return(NULL);
+	}
+
+	err = bus_dmamem_alloc(dma->dma_tag, &dma->v_addr,
+		flag, &dma->dma_map);
+	if (err) {
+		printf("fwdma_malloc: failed(2)\n");
+		/* XXX destory tag */
+		return(NULL);
+	}
+
+	bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->v_addr,
+		size, fwdma_map_cb, &dma->bus_addr, /*flags*/0);
+
+	return(dma->v_addr);
+}
+
+void
+fwdma_free(struct firewire_comm *fc, struct fwdma_alloc *dma)
+{
+        bus_dmamap_unload(dma->dma_tag, dma->dma_map);
+	bus_dmamem_free(dma->dma_tag, dma->v_addr, dma->dma_map);
+	bus_dma_tag_destroy(dma->dma_tag);
+}
+
+
+void *
+fwdma_malloc_size(bus_dma_tag_t dmat, bus_dmamap_t *dmamap,
+	bus_size_t size, bus_addr_t *bus_addr, int flag)
+{
+	void *v_addr;
+
+	if (bus_dmamem_alloc(dmat, &v_addr, flag, dmamap)) {
+		printf("fwdma_malloc_size: failed(1)\n");
+		return(NULL);
+	}
+	bus_dmamap_load(dmat, *dmamap, v_addr, size,
+			fwdma_map_cb, bus_addr, /*flags*/0);
+	return(v_addr);
+}
+
+void
+fwdma_free_size(bus_dma_tag_t dmat, bus_dmamap_t dmamap,
+		void *vaddr, bus_size_t size)
+{
+	bus_dmamap_unload(dmat, dmamap);
+	bus_dmamem_free(dmat, vaddr, dmamap);
+} 
+
+/*
+ * Allocate multisegment dma buffers
+ * each segment size is eqaul to ssize except last segment.
+ */
+struct fwdma_alloc_multi *
+fwdma_malloc_multiseg(struct firewire_comm *fc, int alignment,
+		int esize, int n, int flag)
+{
+	struct fwdma_alloc_multi *am;
+	struct fwdma_seg *seg;
+	bus_size_t ssize;
+	int nseg;
+
+	if (esize > PAGE_SIZE) {
+		/* round up to PAGE_SIZE */
+		esize = ssize = roundup2(esize, PAGE_SIZE);
+		nseg = n;
+	} else {
+		/* allocate PAGE_SIZE segment for small elements */
+		ssize = rounddown(PAGE_SIZE, esize);
+		nseg = howmany(n, ssize / esize);
+	}
+	am = (struct fwdma_alloc_multi *)malloc(sizeof(struct fwdma_alloc_multi)
+			+ sizeof(struct fwdma_seg)*nseg, M_FW, M_WAITOK);
+	if (am == NULL) {
+		printf("fwdma_malloc_multiseg: malloc failed\n");
+		return(NULL);
+	}
+	am->ssize = ssize;
+	am->esize = esize;
+	am->nseg = 0;
+	if (bus_dma_tag_create(
+			/*parent*/ fc->dmat,
+			/*alignment*/ alignment,
+			/*boundary*/ 0,
+			/*lowaddr*/ BUS_SPACE_MAXADDR_32BIT,
+			/*highaddr*/ BUS_SPACE_MAXADDR,
+			/*filter*/NULL, /*filterarg*/NULL,
+			/*maxsize*/ ssize,
+			/*nsegments*/ 1,
+			/*maxsegsz*/ BUS_SPACE_MAXSIZE_32BIT,
+			/*flags*/ BUS_DMA_ALLOCNOW,
+#if defined(__FreeBSD__) && __FreeBSD_version >= 501102
+			/*lockfunc*/busdma_lock_mutex,
+			/*lockarg*/&Giant,
+#endif
+			&am->dma_tag)) {
+		printf("fwdma_malloc_multiseg: tag_create failed\n");
+		free(am, M_FW);
+		return(NULL);
+	}
+
+#if 0
+#if defined(__DragonFly__) || __FreeBSD_version < 500000
+	printf("malloc_multi: ssize=%d nseg=%d\n", ssize, nseg);
+#else
+	printf("malloc_multi: ssize=%td nseg=%d\n", ssize, nseg);
+#endif
+#endif
+	for (seg = &am->seg[0]; nseg --; seg ++) {
+		seg->v_addr = fwdma_malloc_size(am->dma_tag, &seg->dma_map,
+			ssize, &seg->bus_addr, flag);
+		if (seg->v_addr == NULL) {
+			printf("fwdma_malloc_multi: malloc_size failed %d\n",
+				am->nseg);
+			fwdma_free_multiseg(am);
+			return(NULL);
+		}
+		am->nseg++;
+	}
+	return(am);
+}
+
+void
+fwdma_free_multiseg(struct fwdma_alloc_multi *am)
+{
+	struct fwdma_seg *seg;
+
+	for (seg = &am->seg[0]; am->nseg --; seg ++) {
+		fwdma_free_size(am->dma_tag, seg->dma_map,
+			seg->v_addr, am->ssize);
+	}
+	bus_dma_tag_destroy(am->dma_tag);
+	free(am, M_FW);
+}