| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <11891624582950-git-send-email-wei.zhang@freescale.com>
Date: Fri, 7 Sep 2007 18:54:18 +0800
From: Zhang Wei <wei.zhang@...escale.com>
To: paulus@...ba.org, shannon.nelson@...el.com
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
galak@...nel.crashing.org, Zhang Wei <wei.zhang@...escale.com>,
Ebony Zhu <ebony.zhu@...escale.com>
Subject: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xx processors.
The driver implements DMA engine API for Freescale MPC85xx DMA
controller, which could be used for MEM<-->MEM, IO_ADDR<-->MEM
and IO_ADDR<-->IO_ADDR data transfer.
The driver supports the Basic mode of Freescale MPC85xx DMA controller.
The MPC85xx processors supported include MPC8540/60, MPC8555, MPC8548,
MPC8641 and so on.
The support for MPC83xx(MPC8349, MPC8360) is experimental.
Signed-off-by: Zhang Wei <wei.zhang@...escale.com>
Signed-off-by: Ebony Zhu <ebony.zhu@...escale.com>
---
drivers/dma/Kconfig | 8 +
drivers/dma/Makefile | 1 +
drivers/dma/fsldma.c | 995 ++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/dma/fsldma.h | 188 ++++++++++
4 files changed, 1192 insertions(+), 0 deletions(-)
create mode 100644 drivers/dma/fsldma.c
create mode 100644 drivers/dma/fsldma.h
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 8f670da..a99e925 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -40,4 +40,12 @@ config INTEL_IOP_ADMA
---help---
Enable support for the Intel(R) IOP Series RAID engines.
+config FSL_DMA
+ bool "Freescale MPC85xx/MPC83xx DMA support"
+ depends on DMA_ENGINE && PPC
+ ---help---
+ Enable support for the Freescale DMA engine. Now, it support
+ MPC8560/40, MPC8555, MPC8548 and MPC8641 processors.
+ The MPC8349, MPC8360 support is experimental.
+
endmenu
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index b3839b6..50ab26c 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_DMA_ENGINE) += dmaengine.o
obj-$(CONFIG_NET_DMA) += iovlock.o
obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
obj-$(CONFIG_INTEL_IOP_ADMA) += iop-adma.o
+obj-$(CONFIG_FSL_DMA) += fsldma.o
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
new file mode 100644
index 0000000..9e2d56b
--- /dev/null
+++ b/drivers/dma/fsldma.c
@@ -0,0 +1,995 @@
+/*
+ * Freescale MPC85xx, MPC83xx DMA Engine support
+ *
+ * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author:
+ * Zhang Wei <wei.zhang@...escale.com>, Jul 2007
+ * Ebony Zhu <ebony.zhu@...escale.com>, May 2007
+ *
+ * Description:
+ * DMA engine driver for Freescale MPC8540 DMA controller, which is
+ * also fit for MPC8560, MPC8555, MPC8548, MPC8641, and etc.
+ * The support for MPC8349 DMA contorller is also added. But it's
+ * ONLY experimental for MPC8349 now.
+ *
+ * This 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.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/dmaengine.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/of_platform.h>
+
+#include "fsldma.h"
+
+static LIST_HEAD(recy_ln_chain); /* ld chain for recycle */
+static spinlock_t recy_ln_lock = SPIN_LOCK_UNLOCKED;
+
+static void dma_do_tasklet(unsigned long unused);
+static DECLARE_TASKLET(dma_tasklet, dma_do_tasklet, 0);
+
+#define to_fsl_chan(chan) container_of(chan, struct fsl_dma_chan, common)
+#define to_fsl_desc(lh) container_of(lh, struct fsl_desc_sw, node)
+#define tx_to_fsl_desc(tx) container_of(tx, struct fsl_desc_sw, async_tx)
+
+static void dma_init(struct fsl_dma_chan *fsl_chan)
+{
+ /* Reset the channel */
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->mr, 0, 32);
+
+ switch (fsl_chan->feature & FSL_DMA_IP_MASK) {
+ case FSL_DMA_IP_86XX:
+ /* Set the channel to below modes:
+ * EIE - Error interrupt enable
+ * EOSIE - End of segments interrupt enable (basic mode)
+ * EOLNIE - End of links interrupt enable
+ */
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EIE
+ | FSL_DMA_MR_EOLNIE | FSL_DMA_MR_EOSIE, 32);
+ break;
+ case FSL_DMA_IP_83XX:
+ /* Set the channel to below modes:
+ * EOTIE - End-of-transfer interrupt enable
+ */
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->mr, FSL_DMA_MR_EOTIE,
+ 32);
+ break;
+ }
+
+}
+
+static void set_sr(struct fsl_dma_chan *fsl_chan, dma_addr_t val)
+{
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->sr, val, 32);
+}
+
+static dma_addr_t get_sr(struct fsl_dma_chan *fsl_chan)
+{
+ return MIX_IN(fsl_chan, &fsl_chan->reg_base->sr, 32);
+}
+
+static void get_desc(struct fsl_dma_chan *fsl_chan, struct fsl_dma_ld_hw *hw,
+ struct fsl_ld_desc *ld)
+{
+ BUG_ON(!hw);
+
+ ld->src = MIX_TO_CPU(fsl_chan, hw->src_addr, 64);
+ ld->dest = MIX_TO_CPU(fsl_chan, hw->dst_addr, 64);
+ ld->count = MIX_TO_CPU(fsl_chan, hw->count, 32);
+ ld->next_ld_desc = MIX_TO_CPU(fsl_chan, hw->next_ln_addr, 64);
+
+ switch (fsl_chan->feature & FSL_DMA_IP_MASK) {
+ case FSL_DMA_IP_86XX:
+ ld->src &= (dma_addr_t)0x0000ffffffffffffull;
+ ld->dest &= (dma_addr_t)0x0000ffffffffffffull;
+ break;
+ case FSL_DMA_IP_83XX:
+ ld->next_ld_desc &= ~FSL_DMA_SNEN;
+ break;
+ }
+}
+
+static void set_desc(struct fsl_dma_chan *fsl_chan, struct fsl_dma_ld_hw *hw,
+ struct fsl_ld_desc *ld)
+{
+ hw->src_addr = (__mix64)CPU_TO_MIX(fsl_chan, ld->src, 64);
+ hw->dst_addr = (__mix64)CPU_TO_MIX(fsl_chan, ld->dest, 64);
+ hw->count = (__mix32)CPU_TO_MIX(fsl_chan, ld->count, 32);
+ hw->next_ln_addr = (__mix64)CPU_TO_MIX(fsl_chan, ld->next_ld_desc, 64);
+
+ switch (fsl_chan->feature & FSL_DMA_IP_MASK) {
+ case FSL_DMA_IP_86XX:
+ hw->src_addr.be |= CPU_TO_MIX(fsl_chan,
+ (u64)FSL_DMA_SATR_SREADTYPE_SNOOP_READ
+ << 32, 64);
+ hw->dst_addr.be |= CPU_TO_MIX(fsl_chan,
+ (u64)FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE
+ << 32, 64);
+ break;
+ case FSL_DMA_IP_83XX:
+ hw->next_ln_addr.le |= CPU_TO_MIX(fsl_chan, FSL_DMA_SNEN, 64);
+ break;
+ }
+}
+
+static void set_cdar(struct fsl_dma_chan *fsl_chan, dma_addr_t addr)
+{
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->cdar, addr | FSL_DMA_SNEN, 64);
+}
+
+static dma_addr_t get_cdar(struct fsl_dma_chan *fsl_chan)
+{
+ return MIX_IN(fsl_chan, &fsl_chan->reg_base->cdar, 64) & ~FSL_DMA_SNEN;
+}
+
+static void set_ndar(struct fsl_dma_chan *fsl_chan, dma_addr_t addr)
+{
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->ndar, addr, 64);
+}
+
+static dma_addr_t get_ndar(struct fsl_dma_chan *fsl_chan)
+{
+ return MIX_IN(fsl_chan, &fsl_chan->reg_base->ndar, 64);
+}
+
+static int dma_is_idle(struct fsl_dma_chan *fsl_chan)
+{
+ return (get_sr(fsl_chan) & FSL_DMA_SR_CB) == 0;
+}
+
+static void dma_start(struct fsl_dma_chan *fsl_chan)
+{
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->mr,
+ MIX_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) | FSL_DMA_MR_CS,
+ 32);
+}
+
+static void dma_halt(struct fsl_dma_chan *fsl_chan)
+{
+ MIX_OUT(fsl_chan, &fsl_chan->reg_base->mr,
+ MIX_IN(fsl_chan, &fsl_chan->reg_base->mr, 32) & ~FSL_DMA_MR_CS,
+ 32);
+}
+
+static void set_ld_eol(struct fsl_dma_chan *fsl_chan,
+ struct fsl_desc_sw *desc)
+{
+ struct fsl_ld_desc ld;
+ get_desc(fsl_chan, &desc->hw, &ld);
+ ld.next_ld_desc |= FSL_DMA_EOL;
+ set_desc(fsl_chan, &desc->hw, &ld);
+}
+
+static void append_ld_queue(struct fsl_dma_chan *fsl_chan,
+ struct fsl_desc_sw *new_desc)
+{
+ struct fsl_ld_desc ld;
+ struct fsl_desc_sw *queue_tail = to_fsl_desc(fsl_chan->ld_queue.prev);
+
+ if (list_empty(&fsl_chan->ld_queue))
+ return;
+
+ get_desc(fsl_chan, &queue_tail->hw, &ld);
+ /* Link to the new descript physical address and
+ * Enable End-of-segment interrupt for
+ * the last link descriptor.
+ * (the previous node's next link descriptor)
+ */
+ ld.next_ld_desc = new_desc->async_tx.phys | FSL_DMA_EOSIE;
+ set_desc(fsl_chan, &queue_tail->hw, &ld);
+}
+
+static void fsl_dma_set_src(dma_addr_t addr,
+ struct dma_async_tx_descriptor *tx, int index)
+{
+ struct fsl_desc_sw *desc_node, *desc = tx_to_fsl_desc(tx);
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan);
+
+ list_for_each_entry(desc_node, &desc->async_tx.tx_list, node) {
+ struct fsl_ld_desc ld;
+ get_desc(fsl_chan, &desc_node->hw, &ld);
+ ld.src = addr;
+ set_desc(fsl_chan, &desc_node->hw, &ld);
+ addr += FSL_DMA_BCR_MAX_CNT;
+ }
+}
+
+static void fsl_dma_set_dest(dma_addr_t addr,
+ struct dma_async_tx_descriptor *tx, int index)
+{
+ struct fsl_desc_sw *desc_node, *desc = tx_to_fsl_desc(tx);
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan);
+
+ list_for_each_entry(desc_node, &desc->async_tx.tx_list, node) {
+ struct fsl_ld_desc ld;
+ get_desc(fsl_chan, &desc_node->hw, &ld);
+ ld.dest = addr;
+ set_desc(fsl_chan, &desc_node->hw, &ld);
+ addr += FSL_DMA_BCR_MAX_CNT;
+ }
+}
+
+static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
+{
+ struct fsl_desc_sw *desc = tx_to_fsl_desc(tx);
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(tx->chan);
+ unsigned long flags;
+ dma_cookie_t cookie;
+
+ /* cookie increment and adding to ld_queue must be atomic */
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+
+ cookie = fsl_chan->common.cookie;
+ cookie++;
+ if (cookie < 0)
+ cookie = 1;
+ desc->async_tx.cookie = cookie;
+ fsl_chan->common.cookie = desc->async_tx.cookie;
+
+ append_ld_queue(fsl_chan, desc);
+ list_splice_init(&desc->async_tx.tx_list, fsl_chan->ld_queue.prev);
+
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+
+ return cookie;
+}
+
+/**
+ * fsl_dma_alloc_descriptor - Allocate descriptor from channel's DMA pool.
+ *
+ * Return - The descriptor allocated. NULL for failed.
+ */
+static struct fsl_desc_sw *fsl_dma_alloc_descriptor(
+ struct fsl_dma_chan *fsl_chan,
+ gfp_t flags)
+{
+ dma_addr_t pdesc;
+ struct fsl_desc_sw *desc_sw;
+
+ desc_sw = dma_pool_alloc(fsl_chan->desc_pool, flags, &pdesc);
+ if (desc_sw) {
+ memset(desc_sw, 0, sizeof(struct fsl_desc_sw));
+ dma_async_tx_descriptor_init(&desc_sw->async_tx,
+ &fsl_chan->common);
+ desc_sw->async_tx.tx_set_src = fsl_dma_set_src;
+ desc_sw->async_tx.tx_set_dest = fsl_dma_set_dest;
+ desc_sw->async_tx.tx_submit = fsl_dma_tx_submit;
+ INIT_LIST_HEAD(&desc_sw->async_tx.tx_list);
+ desc_sw->async_tx.phys = pdesc;
+ }
+
+ return desc_sw;
+}
+
+
+/**
+ * fsl_dma_alloc_chan_resources - Allocate resources for DMA channel.
+ *
+ * This function will create a dma pool for descriptor allocation.
+ *
+ * Return - The number of descriptors allocated.
+ */
+static int fsl_dma_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
+ LIST_HEAD(tmp_list);
+
+ /* We need the descriptor to be aligned to 32bytes
+ * for meeting FSL DMA specification requirement.
+ */
+ fsl_chan->desc_pool = dma_pool_create("fsl_dma_engine_desc_pool",
+ fsl_chan->device->dev, sizeof(struct fsl_desc_sw),
+ 32, 0);
+ if (!fsl_chan->desc_pool) {
+ dev_err(fsl_chan->device->dev, "No memory for channel %d "
+ "descriptor dma pool.\n", fsl_chan->id);
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * fsl_dma_free_chan_resources - Free all resources of the channel.
+ */
+static void fsl_dma_free_chan_resources(struct dma_chan *chan)
+{
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
+ struct fsl_desc_sw *desc, *_desc;
+ unsigned long flags;
+
+ dev_dbg(fsl_chan->device->dev, "Free all channel resources.\n");
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+ list_for_each_entry_safe(desc, _desc, &fsl_chan->ld_queue, node) {
+#ifdef FSL_DMA_LD_DEBUG
+ dev_dbg(fsl_chan->device->dev,
+ "LD %p will be released.\n", desc);
+#endif
+ list_del(&desc->node);
+ /* free link descritpor */
+ dma_pool_free(fsl_chan->desc_pool, desc, desc->async_tx.phys);
+ }
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+ dma_pool_destroy(fsl_chan->desc_pool);
+}
+
+static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy(
+ struct dma_chan *chan, size_t len, int int_en)
+{
+ struct fsl_dma_chan *fsl_chan;
+ struct fsl_desc_sw *first = NULL, *prev = NULL, *new;
+ size_t copy;
+ struct fsl_dma_device *fdev;
+ LIST_HEAD(link_chain);
+
+ if (!chan)
+ return NULL;
+
+ if (!len)
+ return NULL;
+
+ fsl_chan = to_fsl_chan(chan);
+ fdev = fsl_chan->device;
+
+ do {
+ struct fsl_ld_desc ld;
+
+ /* Allocate the link descriptor from DMA pool */
+ new = fsl_dma_alloc_descriptor(fsl_chan, GFP_ATOMIC);
+ if (!new) {
+ dev_err(fdev->dev,
+ "No free memory for link descriptor\n");
+ return NULL;
+ }
+#ifdef FSL_DMA_LD_DEBUG
+ dev_dbg(fdev->dev, "new link desc alloc %p\n", new);
+#endif
+
+ copy = min(len, FSL_DMA_BCR_MAX_CNT);
+
+ memset(&ld, 0, sizeof(struct fsl_ld_desc));
+ ld.count = copy;
+ set_desc(fsl_chan, &new->hw, &ld);
+
+ if (!first)
+ first = new;
+ else {
+ get_desc(fsl_chan, &prev->hw, &ld);
+ ld.next_ld_desc = new->async_tx.phys;
+ set_desc(fsl_chan, &prev->hw, &ld);
+ }
+
+ new->async_tx.cookie = 0;
+ new->async_tx.ack = 1;
+
+ prev = new;
+ len -= copy;
+
+ /* Insert the link descriptor to the LD ring */
+ list_add_tail(&new->node, &first->async_tx.tx_list);
+ } while (len);
+
+ new->async_tx.ack = 0; /* client is in control of this ack */
+ new->async_tx.cookie = -EBUSY;
+
+ /* Set End-of-link to the last link descriptor of new list*/
+ set_ld_eol(fsl_chan, new);
+
+ return first ? &first->async_tx : NULL;
+}
+
+/**
+ * fsl_dma_update_completed_cookie - Update the completed cookie.
+ */
+static void fsl_dma_update_completed_cookie(struct fsl_dma_chan *fsl_chan)
+{
+ struct fsl_desc_sw *cur_desc;
+ dma_addr_t ld_phy;
+
+ ld_phy = get_cdar(fsl_chan) & FSL_DMA_NLDA_MASK;
+
+ if (ld_phy) {
+ cur_desc = (struct fsl_desc_sw *)bus_to_virt(ld_phy);
+
+ if (cur_desc->async_tx.cookie) {
+ if (dma_is_idle(fsl_chan))
+ fsl_chan->completed_cookie =
+ cur_desc->async_tx.cookie;
+ else
+ fsl_chan->completed_cookie =
+ cur_desc->async_tx.cookie - 1;
+ }
+ }
+}
+
+/**
+ * fsl_chan_ld_cleanup -- Clean up link descriptors
+ *
+ * This function clean up the ld_queue of DMA channel.
+ * If 'in_intr' is set, the function will move the link descriptor to
+ * the recycle list. Otherwise, free it directly.
+ */
+static void fsl_chan_ld_cleanup(struct fsl_dma_chan *fsl_chan, int in_intr)
+{
+ struct fsl_desc_sw *desc, *_desc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+
+ fsl_dma_update_completed_cookie(fsl_chan);
+ dev_dbg(fsl_chan->device->dev,
+ "chan completed_cookie = %d\n",
+ fsl_chan->completed_cookie);
+ list_for_each_entry_safe(desc, _desc, &fsl_chan->ld_queue, node) {
+ if (DMA_IN_PROGRESS == dma_async_is_complete(
+ desc->async_tx.cookie,
+ fsl_chan->completed_cookie,
+ fsl_chan->common.cookie))
+ break;
+
+ /* Remove from ld_queue list */
+ list_del(&desc->node);
+
+ /* If this function is called by interrupt action,
+ * we just move to recycle list.
+ * Otherwise, we free it.
+ */
+ if (in_intr)
+ list_add_tail(&desc->node, &recy_ln_chain);
+ else {
+ /* Run the link descriptor callback function */
+ if (desc->async_tx.callback) {
+ spin_unlock_irqrestore(&fsl_chan->desc_lock,
+ flags);
+ dev_dbg(fsl_chan->device->dev,
+ "link descriptor %p callback\n", desc);
+ desc->async_tx.callback(
+ desc->async_tx.callback_param);
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+ }
+
+ dev_dbg(fsl_chan->device->dev,
+ "link descriptor %p will be recycle.\n", desc);
+ dma_pool_free(fsl_chan->desc_pool, desc,
+ desc->async_tx.phys);
+ }
+ }
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+}
+
+/**
+ * fsl_chan_xfer_ld_queue -- Transfer the link descriptors in channel
+ * ld_queue.
+ */
+static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan)
+{
+ struct list_head *ld_node;
+ dma_addr_t next_dest_addr;
+ unsigned long flags;
+
+ if (!dma_is_idle(fsl_chan))
+ return;
+
+ dma_halt(fsl_chan);
+
+ /* If there are some link descriptors
+ * not transfered in queue. We need to start it.
+ */
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+
+ /* Find the first un-transfer desciptor */
+ for (ld_node = fsl_chan->ld_queue.next;
+ (ld_node != &fsl_chan->ld_queue)
+ && (DMA_SUCCESS == dma_async_is_complete(
+ to_fsl_desc(ld_node)->async_tx.cookie,
+ fsl_chan->completed_cookie,
+ fsl_chan->common.cookie));
+ ld_node = ld_node->next);
+
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+
+ if (ld_node != &fsl_chan->ld_queue) {
+ /* Get the ld start address from ld_queue */
+ next_dest_addr = to_fsl_desc(ld_node)->async_tx.phys;
+ dev_dbg(fsl_chan->device->dev,
+ "xfer LDs staring from 0x%016llx\n",
+ (u64)next_dest_addr);
+ set_cdar(fsl_chan, next_dest_addr);
+ dma_start(fsl_chan);
+ } else {
+ set_cdar(fsl_chan, 0);
+ set_ndar(fsl_chan, 0);
+ }
+}
+
+/**
+ * fsl_dma_memcpy_issue_pending -- Issue the DMA start command
+ */
+static void fsl_dma_memcpy_issue_pending(struct dma_chan *chan)
+{
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
+
+#ifdef FSL_DMA_LD_DEBUG
+ struct fsl_desc_sw *ld;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fsl_chan->desc_lock, flags);
+ if (list_empty(&fsl_chan->ld_queue)) {
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+ return;
+ }
+
+ dev_dbg(fsl_chan->device->dev, "--memcpy issue--\n");
+ list_for_each_entry(ld, &fsl_chan->ld_queue, node) {
+ int i;
+ dev_dbg(fsl_chan->device->dev, "Ch %d, LD %08x\n",
+ fsl_chan->id, ld->async_tx.phys);
+ for (i = 0; i < 8; i++)
+ dev_dbg(fsl_chan->device->dev,
+ "LD offset %d: %08x\n",
+ i, *(((u32 *)&ld->hw) + i));
+ }
+ dev_dbg(fsl_chan->device->dev, "----------------\n");
+ spin_unlock_irqrestore(&fsl_chan->desc_lock, flags);
+#endif
+
+ fsl_chan_xfer_ld_queue(fsl_chan);
+}
+
+static void fsl_dma_dependency_added(struct dma_chan *chan)
+{
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
+
+ fsl_chan_ld_cleanup(fsl_chan, 0);
+}
+
+/**
+ * fsl_dma_is_complete -- Determine the DMA status
+ */
+static enum dma_status fsl_dma_is_complete(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ dma_cookie_t *done,
+ dma_cookie_t *used)
+{
+ struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
+ dma_cookie_t last_used;
+ dma_cookie_t last_complete;
+
+ fsl_chan_ld_cleanup(fsl_chan, 0);
+
+ last_used = chan->cookie;
+ last_complete = fsl_chan->completed_cookie;
+
+ if (done)
+ *done = last_complete;
+
+ if (used)
+ *used = last_used;
+
+ return dma_async_is_complete(cookie, last_complete, last_used);
+}
+
+static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data)
+{
+ struct fsl_dma_chan *fsl_chan = (struct fsl_dma_chan *)data;
+ dma_addr_t stat;
+
+ stat = get_sr(fsl_chan);
+ dev_dbg(fsl_chan->device->dev, "event: channel %d, stat = 0x%x\n",
+ fsl_chan->id, stat);
+ set_sr(fsl_chan, stat); /* Clear the event register */
+
+ stat &= ~(FSL_DMA_SR_CB | FSL_DMA_SR_CH);
+ if (!stat)
+ return IRQ_NONE;
+
+ /* If the link descriptor segment transfer finishes,
+ * we will recycle the used descriptor.
+ */
+ if (stat & FSL_DMA_SR_EOSI) {
+ dev_dbg(fsl_chan->device->dev, "event: End-of-segments INT\n");
+ dev_dbg(fsl_chan->device->dev, "event: clndar 0x%016llx, "
+ "nlndar 0x%016llx\n", (u64)get_cdar(fsl_chan),
+ (u64)get_ndar(fsl_chan));
+ stat &= ~FSL_DMA_SR_EOSI;
+ fsl_chan_ld_cleanup(fsl_chan, 1);
+ }
+
+ /* If it current transfer is the end-of-transfer,
+ * we should clear the Channel Start bit for
+ * prepare next transfer.
+ */
+ if (stat & (FSL_DMA_SR_EOLNI | FSL_DMA_SR_EOCDI)) {
+ dev_dbg(fsl_chan->device->dev, "event: End-of-link INT\n");
+ stat &= ~FSL_DMA_SR_EOLNI;
+ fsl_chan_xfer_ld_queue(fsl_chan);
+ }
+
+ if (stat)
+ dev_dbg(fsl_chan->device->dev, "event: unhandled sr 0x%02x\n",
+ stat);
+
+ dev_dbg(fsl_chan->device->dev, "event: Exit\n");
+ tasklet_hi_schedule(&dma_tasklet);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t fsl_dma_do_interrupt(int irq, void *data)
+{
+ struct fsl_dma_device *fdev = (struct fsl_dma_device *)data;
+ struct fsl_dma_chan *fsl_chan = NULL;
+ u32 gsr;
+ int ch_nr;
+ struct dma_chan *int_chan;
+
+ gsr = (fdev->feature & FSL_DMA_BIG_ENDIAN) ? in_be32(fdev->reg_base)
+ : in_le32(fdev->reg_base);
+ ch_nr = (32 - ffs(gsr)) / 8;
+
+ list_for_each_entry(int_chan, &fdev->common.channels, device_node)
+ if (to_fsl_chan(int_chan)->id == ch_nr)
+ fsl_chan = to_fsl_chan(int_chan);
+
+ return fsl_chan ? fsl_dma_chan_do_interrupt(irq, fsl_chan) : IRQ_NONE;
+
+}
+
+static void dma_do_tasklet(unsigned long unused)
+{
+ struct fsl_desc_sw *desc, *_desc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&recy_ln_lock, flags);
+ list_for_each_entry_safe(desc, _desc, &recy_ln_chain, node) {
+ struct fsl_dma_chan *fsl_chan =
+ to_fsl_chan(desc->async_tx.chan);
+ /* Run the link descriptor callback function */
+ if (desc->async_tx.callback) {
+ spin_unlock_irqrestore(&recy_ln_lock, flags);
+ dev_dbg(fsl_chan->device->dev,
+ "dma_tasklet: link descriptor %p callback\n",
+ desc);
+ desc->async_tx.callback(
+ desc->async_tx.callback_param);
+ spin_lock_irqsave(&recy_ln_lock, flags);
+ }
+ /* Recycle it! */
+ list_del(&desc->node);
+ dev_dbg(fsl_chan->device->dev,
+ "dma_tasklet: link descriptor %p will be recycle.\n",
+ desc);
+ dma_pool_free(fsl_chan->desc_pool, desc,
+ desc->async_tx.phys);
+ }
+ spin_unlock_irqrestore(&recy_ln_lock, flags);
+}
+
+static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan)
+{
+ struct dma_chan *chan;
+ int err = 0;
+ dma_addr_t addr;
+ dma_cookie_t cookie;
+ u8 *src, *dest;
+ int i;
+ size_t test_size;
+ struct dma_async_tx_descriptor *tx1, *tx2, *tx3;
+ struct fsl_dma_device *fdev;
+
+ BUG_ON(!fsl_chan);
+
+ fdev = fsl_chan->device;
+ test_size = 4096;
+
+ src = kmalloc(test_size * 2, GFP_KERNEL);
+ if (!src) {
+ dev_err(fdev->dev,
+ "selftest: Can not alloc memory for test!\n");
+ err = -ENOMEM;
+ goto out;
+ }
+
+ dest = src + test_size;
+
+ for (i = 0; i < test_size; i++)
+ src[i] = (u8) i;
+
+ chan = &fsl_chan->common;
+
+ if (fsl_dma_alloc_chan_resources(chan) < 1) {
+ dev_err(fdev->dev,
+ "selftest: Can not alloc resources for DMA\n");
+ err = -ENODEV;
+ goto out;
+ }
+
+ /* TX 1 */
+ tx1 = fsl_dma_prep_memcpy(chan, test_size / 2, 0);
+ async_tx_ack(tx1);
+ addr = dma_map_single(chan->device->dev, src, test_size / 2,
+ DMA_TO_DEVICE);
+ fsl_dma_set_src(addr, tx1, 0);
+ addr = dma_map_single(chan->device->dev, dest, test_size / 2,
+ DMA_FROM_DEVICE);
+ fsl_dma_set_dest(addr, tx1, 0);
+
+ cookie = fsl_dma_tx_submit(tx1);
+ fsl_dma_memcpy_issue_pending(chan);
+
+ while (fsl_dma_is_complete(chan, cookie, NULL, NULL)
+ != DMA_SUCCESS);
+
+ /* Test free and re-alloc channel resources */
+ fsl_dma_free_chan_resources(chan);
+
+ if (fsl_dma_alloc_chan_resources(chan) < 1) {
+ dev_err(fdev->dev,
+ "selftest: Can not alloc resources for DMA\n");
+ err = -ENODEV;
+ goto out;
+ }
+
+ /* Continue to test
+ * TX 2
+ */
+ tx2 = fsl_dma_prep_memcpy(chan, test_size / 4, 0);
+ async_tx_ack(tx2);
+ addr = dma_map_single(chan->device->dev, src + test_size / 2,
+ test_size / 4, DMA_TO_DEVICE);
+ fsl_dma_set_src(addr, tx2, 0);
+ addr = dma_map_single(chan->device->dev, dest + test_size / 2,
+ test_size / 4, DMA_FROM_DEVICE);
+ fsl_dma_set_dest(addr, tx2, 0);
+
+ /* TX 3 */
+ tx3 = fsl_dma_prep_memcpy(chan, test_size / 4, 0);
+ async_tx_ack(tx3);
+ addr = dma_map_single(chan->device->dev, src + test_size * 3 / 4,
+ test_size / 4, DMA_TO_DEVICE);
+ fsl_dma_set_src(addr, tx3, 0);
+ addr = dma_map_single(chan->device->dev, dest + test_size * 3 / 4,
+ test_size / 4, DMA_FROM_DEVICE);
+ fsl_dma_set_dest(addr, tx3, 0);
+
+ /* Test exchanging the prepared tx sort */
+ cookie = fsl_dma_tx_submit(tx3);
+ cookie = fsl_dma_tx_submit(tx2);
+
+ fsl_dma_memcpy_issue_pending(chan);
+ while (fsl_dma_is_complete(chan, cookie, NULL, NULL)
+ != DMA_SUCCESS);
+ err = memcmp(src, dest, test_size);
+ if (err) {
+ for (i = 0; (*(src + i) == *(dest + i)) && (i < test_size);
+ i++);
+ dev_err(fdev->dev, "selftest: Test failed, data %d/%d is "
+ "error! src 0x%x, dest 0x%x\n",
+ i, test_size, *(src + i), *(dest + i));
+ }
+
+ fsl_dma_free_chan_resources(chan);
+
+out:
+ kfree(src);
+ return err;
+}
+
+static struct dma_chan *of_find_dma_chan_by_phandle(phandle phandle)
+{
+ struct device_node *np;
+ struct dma_chan *chan;
+ struct fsl_dma_device *fdev;
+
+ np = of_find_node_by_phandle(phandle);
+ if (!np || !of_device_is_compatible(np->parent, "fsl,dma"))
+ return NULL;
+
+ fdev = dev_get_drvdata(&of_find_device_by_node(np->parent)->dev);
+
+ list_for_each_entry(chan, &fdev->common.channels, device_node)
+ if (to_of_device(to_fsl_chan(chan)->chan_dev)->node == np)
+ return chan;
+ return NULL;
+}
+EXPORT_SYMBOL(of_find_dma_chan_by_phandle);
+
+static int __devinit of_fsl_dma_probe(struct of_device *dev,
+ const struct of_device_id *match)
+{
+ int err;
+ unsigned int irq;
+ struct fsl_dma_device *fdev;
+
+ fdev = kzalloc(sizeof(struct fsl_dma_device), GFP_KERNEL);
+ if (!fdev) {
+ dev_err(&dev->dev, "No enough memory for 'priv'\n");
+ err = -ENOMEM;
+ goto err;
+ }
+ fdev->dev = &dev->dev;
+ INIT_LIST_HEAD(&fdev->common.channels);
+
+ /* get DMA controller register base */
+ err = of_address_to_resource(dev->node, 0, &fdev->reg);
+ if (err) {
+ dev_err(&dev->dev, "Can't get %s property 'reg'\n",
+ dev->node->full_name);
+ goto err;
+ }
+
+ dev_info(&dev->dev, "Probe the Freescale DMA driver for %s "
+ "controller at 0x%08x...\n",
+ match->compatible, fdev->reg.start);
+ fdev->reg_base = ioremap(fdev->reg.start, fdev->reg.end
+ - fdev->reg.start + 1);
+
+ dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask);
+ fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources;
+ fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources;
+ fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy;
+ fdev->common.device_is_tx_complete = fsl_dma_is_complete;
+ fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending;
+ fdev->common.device_dependency_added = fsl_dma_dependency_added;
+ fdev->common.dev = &dev->dev;
+
+ irq = irq_of_parse_and_map(dev->node, 0);
+ if (irq != NO_IRQ) {
+ err = request_irq(irq, &fsl_dma_do_interrupt, IRQF_SHARED,
+ "fsldma-device", fdev);
+ if (err) {
+ dev_err(&dev->dev, "DMA device request_irq error "
+ "with return %d\n", err);
+ goto err;
+ }
+ }
+
+ dev_set_drvdata(&(dev->dev), fdev);
+ dma_async_device_register(&fdev->common);
+ return 0;
+
+err:
+ iounmap(fdev->reg_base);
+ kfree(fdev);
+ return err;
+}
+
+static int __devinit of_fsl_dma_chan_probe(struct of_device *dev,
+ const struct of_device_id *match)
+{
+ struct fsl_dma_device *fdev;
+ struct fsl_dma_chan *new_fsl_chan;
+ int err;
+
+ fdev = dev_get_drvdata(dev->dev.parent);
+ BUG_ON(!fdev);
+
+ /* alloc channel */
+ new_fsl_chan = kzalloc(sizeof(struct fsl_dma_chan), GFP_KERNEL);
+ if (!new_fsl_chan) {
+ dev_err(&dev->dev, "No free memory for allocating "
+ "dma channels!\n");
+ err = -ENOMEM;
+ goto err;
+ }
+
+ /* get dma channel register base */
+ err = of_address_to_resource(dev->node, 0, &new_fsl_chan->reg);
+ if (err) {
+ dev_err(&dev->dev, "Can't get %s property 'reg'\n",
+ dev->node->full_name);
+ goto err;
+ }
+
+ if (strcmp(match->compatible, "fsl,mpc8540-dma-channel") == 0)
+ new_fsl_chan->feature = FSL_DMA_IP_86XX | FSL_DMA_BIG_ENDIAN;
+ else if (strcmp(match->compatible, "fsl,mpc8349-dma-channel") == 0)
+ new_fsl_chan->feature = FSL_DMA_IP_83XX | FSL_DMA_LITTLE_ENDIAN;
+ else {
+ dev_err(&dev->dev, "No channel operations!\n");
+ err = -EINVAL;
+ goto err;
+ }
+
+ if (!fdev->feature)
+ fdev->feature = new_fsl_chan->feature;
+
+ /* If the DMA device's feature is different than its channels',
+ * report the bug.
+ */
+ BUG_ON(fdev->feature != new_fsl_chan->feature);
+
+ new_fsl_chan->device = fdev;
+ new_fsl_chan->chan_dev = &dev->dev;
+ new_fsl_chan->reg_base = ioremap(new_fsl_chan->reg.start,
+ new_fsl_chan->reg.end - new_fsl_chan->reg.start + 1);
+
+ new_fsl_chan->id = ((new_fsl_chan->reg.start - 0x100) & 0xfff) >> 7;
+
+ /* Init the channel */
+ dma_init(new_fsl_chan);
+
+ /* Clear cdar registers */
+ set_cdar(new_fsl_chan, 0);
+
+ spin_lock_init(&new_fsl_chan->desc_lock);
+ INIT_LIST_HEAD(&new_fsl_chan->ld_queue);
+
+ new_fsl_chan->common.device = &fdev->common;
+
+ /* Add the channel to DMA device channel list */
+ list_add_tail(&new_fsl_chan->common.device_node,
+ &fdev->common.channels);
+ fdev->common.chancnt++;
+
+ new_fsl_chan->irq = irq_of_parse_and_map(dev->node, 0);
+ if (new_fsl_chan->irq != NO_IRQ) {
+ err = request_irq(new_fsl_chan->irq,
+ &fsl_dma_chan_do_interrupt, IRQF_SHARED,
+ "fsldma-channel", new_fsl_chan);
+ if (err) {
+ dev_err(&dev->dev, "DMA channel %s request_irq error "
+ "with return %d\n", dev->node->full_name, err);
+ goto err;
+ }
+ }
+
+ err = fsl_dma_self_test(new_fsl_chan);
+ if (err)
+ goto err;
+
+ dev_info(&dev->dev, "#%d (%s), irq %d\n", new_fsl_chan->id,
+ match->compatible, new_fsl_chan->irq);
+
+ return 0;
+err:
+ dma_halt(new_fsl_chan);
+ iounmap(new_fsl_chan->reg_base);
+ free_irq(new_fsl_chan->irq, new_fsl_chan);
+ list_del(&new_fsl_chan->common.device_node);
+ kfree(new_fsl_chan);
+ return err;
+}
+
+static struct of_device_id of_fsl_dma_ids[] = {
+ { .compatible = "fsl,dma", },
+};
+
+static struct of_platform_driver of_fsl_dma_driver = {
+ .name = "of-fsl-dma",
+ .match_table = of_fsl_dma_ids,
+ .probe = of_fsl_dma_probe,
+};
+
+static __init int of_fsl_dma_init(void)
+{
+ return of_register_platform_driver(&of_fsl_dma_driver);
+}
+
+static struct of_device_id of_fsl_dma_chan_ids[] = {
+ { .compatible = "fsl,mpc8540-dma-channel", },
+ { .compatible = "fsl,mpc8349-dma-channel", },
+};
+
+static struct of_platform_driver of_fsl_dma_chan_driver = {
+ .name = "of-fsl-dma-channel",
+ .match_table = of_fsl_dma_chan_ids,
+ .probe = of_fsl_dma_chan_probe,
+};
+
+static __init int of_fsl_dma_chan_init(void)
+{
+ return of_register_platform_driver(&of_fsl_dma_chan_driver);
+}
+
+subsys_initcall(of_fsl_dma_init);
+device_initcall(of_fsl_dma_chan_init);
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
new file mode 100644
index 0000000..05be9ed
--- /dev/null
+++ b/drivers/dma/fsldma.h
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author:
+ * Zhang Wei <wei.zhang@...escale.com>, Jul 2007
+ * Ebony Zhu <ebony.zhu@...escale.com>, May 2007
+ *
+ * Description:
+ * This file defines data structures needed by Freescale
+ * MPC8540 and MPC8349 DMA controller.
+ *
+ * This 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.
+ *
+ */
+#ifndef __FSLDMA_H
+#define __FSLDMA_H
+
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dmaengine.h>
+
+#define FSL_DMA_MR_CS 0x00000001
+#define FSL_DMA_MR_CC 0x00000002
+#define FSL_DMA_MR_EIE 0x00000040
+#define FSL_DMA_MR_XFE 0x00000020
+#define FSL_DMA_MR_EOLNIE 0x00000100
+#define FSL_DMA_MR_EOLSIE 0x00000080
+#define FSL_DMA_MR_EOSIE 0x00000200
+#define FSL_DMA_MR_CDSM 0x00000010
+#define FSL_DMA_MR_CTM 0x00000004
+
+/* Special MR definition for MPC8349 */
+#define FSL_DMA_MR_EOTIE 0x00000080
+
+#define FSL_DMA_SR_CH 0x00000020
+#define FSL_DMA_SR_CB 0x00000004
+#define FSL_DMA_SR_TE 0x00000080
+#define FSL_DMA_SR_EOSI 0x00000002
+#define FSL_DMA_SR_EOLSI 0x00000001
+#define FSL_DMA_SR_EOCDI 0x00000001
+#define FSL_DMA_SR_EOLNI 0x00000008
+
+#define FSL_DMA_SATR_SBPATMU 0x20000000
+#define FSL_DMA_SATR_STRANSINT_RIO 0x00c00000
+#define FSL_DMA_SATR_SREADTYPE_SNOOP_READ 0x00050000
+#define FSL_DMA_SATR_SREADTYPE_BP_IORH 0x00020000
+#define FSL_DMA_SATR_SREADTYPE_BP_NREAD 0x00040000
+#define FSL_DMA_SATR_SREADTYPE_BP_MREAD 0x00070000
+
+#define FSL_DMA_DATR_DBPATMU 0x20000000
+#define FSL_DMA_DATR_DTRANSINT_RIO 0x00c00000
+#define FSL_DMA_DATR_DWRITETYPE_SNOOP_WRITE 0x00050000
+#define FSL_DMA_DATR_DWRITETYPE_BP_FLUSH 0x00010000
+
+#define FSL_DMA_EOL ((u64)0x1)
+#define FSL_DMA_SNEN ((u64)0x10)
+#define FSL_DMA_EOSIE 0x8
+#define FSL_DMA_NLDA_MASK (~(u64)0x1f)
+
+#define FSL_DMA_BCR_MAX_CNT 0x03ffffffu
+
+#define FSL_DMA_DGSR_TE 0x80
+#define FSL_DMA_DGSR_CH 0x20
+#define FSL_DMA_DGSR_PE 0x10
+#define FSL_DMA_DGSR_EOLNI 0x08
+#define FSL_DMA_DGSR_CB 0x04
+#define FSL_DMA_DGSR_EOSI 0x02
+#define FSL_DMA_DGSR_EOLSI 0x01
+
+
+typedef union mix32 {
+ __le32 le;
+ __be32 be;
+} __mix32;
+
+typedef union mix64 {
+ __le64 le;
+ __be64 be;
+} __mix64;
+
+struct fsl_dma_ld_hw {
+ __mix64 src_addr;
+ __mix64 dst_addr;
+ __mix64 next_ln_addr;
+ __mix32 count;
+ __mix32 reserve;
+} __attribute__((aligned(32)));
+
+struct fsl_ld_desc {
+ dma_addr_t dest;
+ dma_addr_t src;
+ u32 count;
+ dma_addr_t next_ld_desc;
+};
+
+struct fsl_desc_sw {
+ struct fsl_dma_ld_hw hw;
+ struct list_head node;
+ struct dma_async_tx_descriptor async_tx;
+ struct list_head *ld;
+ void *priv;
+} __attribute__((aligned(32)));
+
+struct fsl_dma_chan_regs {
+ __mix32 mr; /* 0x00 - Mode Register */
+ __mix32 sr; /* 0x04 - Status Register */
+ __mix64 cdar; /* 0x08 - Cureent descriptor address register */
+ __mix64 sar; /* 0x10 - Source Address Register */
+ __mix64 dar; /* 0x18 - Destination Address Register */
+ __mix32 bcr; /* 0x20 - Byte Count Register */
+ __mix64 ndar; /* 0x24 - Next Descriptor Address Register */
+};
+
+struct fsl_dma_device {
+ void __iomem *reg_base; /* DGSR register base */
+ struct resource reg; /* Resource for register */
+ struct device *dev;
+ struct dma_device common;
+ u32 feature; /* The same as DMA channels */
+};
+
+/* Define macros for fsl_dma_chan->feature property */
+#define FSL_DMA_LITTLE_ENDIAN 0x00000000
+#define FSL_DMA_BIG_ENDIAN 0x00000001
+
+#define FSL_DMA_IP_MASK 0x00000ff0
+#define FSL_DMA_IP_86XX 0x00000010
+#define FSL_DMA_IP_83XX 0x00000020
+
+struct fsl_dma_chan {
+ struct fsl_dma_chan_regs __iomem *reg_base;
+ dma_cookie_t completed_cookie; /* The maximum cookie completed */
+ spinlock_t desc_lock;
+ struct list_head ld_queue; /* Link descriptors queue */
+ struct fsl_dma_device *device;
+ struct dma_chan common;
+ struct dma_pool *desc_pool;
+ struct device *chan_dev;
+ struct resource reg; /* Resource for register */
+ int irq;
+ int id; /* Raw id of this channel */
+ u32 feature;
+};
+
+#ifndef __powerpc64
+static u64 in_be64(const u64 __iomem *addr)
+{
+ return ((u64)in_be32((u32 *)addr) << 32) | (in_be32((u32 *)addr + 1));
+}
+
+static void out_be64(u64 __iomem *addr, u64 val)
+{
+ out_be32((u32 *)addr, val >> 32);
+ out_be32((u32 *)addr + 1, (u32)val);
+}
+
+/* There is no asm instructions for 64 bits reverse loads and stores */
+static u64 in_le64(const u64 __iomem *addr)
+{
+ return le64_to_cpu(in_be64(addr));
+}
+
+static void out_le64(u64 __iomem *addr, u64 val)
+{
+ out_be64(addr, cpu_to_le64(val));
+}
+#endif
+
+#define MIX_IN(fsl_chan, addr, width) \
+ (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
+ in_be##width(&(addr)->be) : in_le##width(&(addr)->le))
+#define MIX_OUT(fsl_chan, addr, val, width) \
+ (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
+ out_be##width(&(addr)->be, val) : \
+ out_le##width(&(addr)->le, val))
+
+#define MIX_TO_CPU(fsl_chan, mix, width) \
+ (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
+ be##width##_to_cpu((mix).be) : \
+ le##width##_to_cpu((mix).le))
+#define CPU_TO_MIX(fsl_chan, mix, width) \
+ (((fsl_chan)->feature & FSL_DMA_BIG_ENDIAN) ? \
+ cpu_to_be##width(mix) : cpu_to_le##width(mix))
+
+#endif /* __FSLDMA_H */
--
1.5.2
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists