gpl-source-mybooklive-010002-update.zipgpl-source-mybooklive-010103-update.zipgpl-source-mybooklive-010002-update.zip

1 files changed, 88 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/async_tx.h b/arch/powerpc/include/asm/async_tx.h
new file mode 100644
index 00000000000..6b49cf1f702
--- /dev/null
+++ b/arch/powerpc/include/asm/async_tx.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright(c) 2008 DENX Engineering. All rights reserved.
+ *
+ * Author: Yuri Tikhonov <yur@emcraft.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called COPYING.
+ */
+#ifndef _PPC_ASYNC_TX_H_
+#define _PPC_ASYNC_TX_H_
+
+#if defined(CONFIG_440SPe) || defined(CONFIG_440SP) 
+extern int ppc440spe_adma_estimate (struct dma_chan *chan,
+	enum dma_transaction_type cap, struct page **src_lst,
+	int src_cnt, size_t src_sz);
+#define ppc_adma_estimate(chan, cap, src_lst, src_cnt, src_sz) \
+	ppc440spe_adma_estimate(chan, cap, src_lst, src_cnt, src_sz)
+#elif  defined(CONFIG_460EX) || defined(CONFIG_460GT)
+extern int ppc460ex_adma_estimate (struct dma_chan *chan,
+	enum dma_transaction_type cap, struct page **src_lst,
+	int src_cnt, size_t src_sz);
+#define ppc_adma_estimate(chan, cap, src_lst, src_cnt, src_sz) \
+	ppc460ex_adma_estimate(chan, cap, src_lst, src_cnt, src_sz)
+#elif defined(CONFIG_APM82181)
+extern int apm82181_adma_estimate (struct dma_chan *chan,
+        enum dma_transaction_type cap, struct page **src_lst,
+        int src_cnt, size_t src_sz);
+#define ppc_adma_estimate(chan, cap, src_lst, src_cnt, src_sz) \
+        apm82181_adma_estimate(chan, cap, src_lst, src_cnt, src_sz)
+#endif
+
+struct ppc_dma_chan_ref {
+	struct dma_chan *chan;
+	struct list_head node;
+};
+
+extern struct list_head ppc_adma_chan_list;
+
+/**
+ * ppc_async_tx_find_best_channel - find a channel with the maximum rank for the
+ *	transaction type given (the rank of the operation is the value
+ *	returned by the device_estimate method).
+ * @cap: transaction type
+ * @src_lst: array of pointers to sources for the transaction
+ * @src_cnt: number of arguments (size of the srcs array)
+ * @src_sz: length of the each argument pointed by srcs
+ */
+static inline struct dma_chan *
+ppc_async_tx_find_best_channel (enum dma_transaction_type cap,
+	struct page **src_lst, int src_cnt, size_t src_sz)
+{
+	struct dma_chan *best_chan = NULL;
+	struct ppc_dma_chan_ref *ref;
+	int best_rank = -1;
+
+	list_for_each_entry(ref, &ppc_adma_chan_list, node)
+		if (dma_has_cap(cap, ref->chan->device->cap_mask)) {
+			int rank;
+
+			rank = ppc_adma_estimate (ref->chan,
+				cap, src_lst, src_cnt, src_sz);
+			if (rank > best_rank) {
+				best_rank = rank;
+				best_chan = ref->chan;
+			}
+		}
+
+	return best_chan;
+}
+
+#define async_tx_find_channel(dep, type, dst, dst_count, src, src_count, len) \
+	ppc_async_tx_find_best_channel(type, src, src_count, len)
+
+#endif