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authorVinod Koul <vinod.koul@linux.intel.com>2012-03-13 12:39:49 +0530
committerVinod Koul <vinod.koul@linux.intel.com>2012-03-13 12:39:49 +0530
commit1f3d6dc0be92f0caca937926cca16ec4fdd585a3 (patch)
treea12562009ae984dd16ed080af13d0036b88a93a7 /drivers/dma
parent5170c051a56244816d948c43592c1b2805ed4f3a (diff)
parent949ff5b8d46b5e3435d21b2651ce3a2599208d44 (diff)
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Merge branch 'rmk_cookie_fixes2' into next
Conflicts: drivers/dma/imx-dma.c drivers/dma/pl330.c Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/amba-pl08x.c38
-rw-r--r--drivers/dma/at_hdmac.c48
-rw-r--r--drivers/dma/at_hdmac_regs.h2
-rw-r--r--drivers/dma/coh901318.c39
-rw-r--r--drivers/dma/dmaengine.h89
-rw-r--r--drivers/dma/dw_dmac.c43
-rw-r--r--drivers/dma/dw_dmac_regs.h1
-rw-r--r--drivers/dma/ep93xx_dma.c25
-rw-r--r--drivers/dma/fsldma.c24
-rw-r--r--drivers/dma/fsldma.h1
-rw-r--r--drivers/dma/imx-dma.c39
-rw-r--r--drivers/dma/imx-sdma.c23
-rw-r--r--drivers/dma/intel_mid_dma.c38
-rw-r--r--drivers/dma/intel_mid_dma_regs.h2
-rw-r--r--drivers/dma/ioat/dma.c21
-rw-r--r--drivers/dma/ioat/dma.h23
-rw-r--r--drivers/dma/ioat/dma_v2.c13
-rw-r--r--drivers/dma/ioat/dma_v3.c12
-rw-r--r--drivers/dma/iop-adma.c52
-rw-r--r--drivers/dma/ipu/ipu_idmac.c22
-rw-r--r--drivers/dma/mpc512x_dma.c25
-rw-r--r--drivers/dma/mv_xor.c34
-rw-r--r--drivers/dma/mv_xor.h3
-rw-r--r--drivers/dma/mxs-dma.c23
-rw-r--r--drivers/dma/pch_dma.c34
-rw-r--r--drivers/dma/pl330.c37
-rw-r--r--drivers/dma/ppc4xx/adma.c49
-rw-r--r--drivers/dma/ppc4xx/adma.h2
-rw-r--r--drivers/dma/shdma.c30
-rw-r--r--drivers/dma/shdma.h1
-rw-r--r--drivers/dma/sirf-dma.c25
-rw-r--r--drivers/dma/ste_dma40.c36
-rw-r--r--drivers/dma/timb_dma.c34
-rw-r--r--drivers/dma/txx9dmac.c41
-rw-r--r--drivers/dma/txx9dmac.h1
35 files changed, 296 insertions, 634 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 513184b4fdd1..1b53f2605250 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -85,6 +85,8 @@
#include <linux/slab.h>
#include <asm/hardware/pl080.h>
+#include "dmaengine.h"
+
#define DRIVER_NAME "pl08xdmac"
static struct amba_driver pl08x_amba_driver;
@@ -919,13 +921,10 @@ static dma_cookie_t pl08x_tx_submit(struct dma_async_tx_descriptor *tx)
struct pl08x_dma_chan *plchan = to_pl08x_chan(tx->chan);
struct pl08x_txd *txd = to_pl08x_txd(tx);
unsigned long flags;
+ dma_cookie_t cookie;
spin_lock_irqsave(&plchan->lock, flags);
-
- plchan->chan.cookie += 1;
- if (plchan->chan.cookie < 0)
- plchan->chan.cookie = 1;
- tx->cookie = plchan->chan.cookie;
+ cookie = dma_cookie_assign(tx);
/* Put this onto the pending list */
list_add_tail(&txd->node, &plchan->pend_list);
@@ -945,7 +944,7 @@ static dma_cookie_t pl08x_tx_submit(struct dma_async_tx_descriptor *tx)
spin_unlock_irqrestore(&plchan->lock, flags);
- return tx->cookie;
+ return cookie;
}
static struct dma_async_tx_descriptor *pl08x_prep_dma_interrupt(
@@ -965,31 +964,17 @@ static enum dma_status pl08x_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct pl08x_dma_chan *plchan = to_pl08x_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
enum dma_status ret;
- u32 bytesleft = 0;
-
- last_used = plchan->chan.cookie;
- last_complete = plchan->lc;
- ret = dma_async_is_complete(cookie, last_complete, last_used);
- if (ret == DMA_SUCCESS) {
- dma_set_tx_state(txstate, last_complete, last_used, 0);
+ ret = dma_cookie_status(chan, cookie, txstate);
+ if (ret == DMA_SUCCESS)
return ret;
- }
/*
* This cookie not complete yet
+ * Get number of bytes left in the active transactions and queue
*/
- last_used = plchan->chan.cookie;
- last_complete = plchan->lc;
-
- /* Get number of bytes left in the active transactions and queue */
- bytesleft = pl08x_getbytes_chan(plchan);
-
- dma_set_tx_state(txstate, last_complete, last_used,
- bytesleft);
+ dma_set_residue(txstate, pl08x_getbytes_chan(plchan));
if (plchan->state == PL08X_CHAN_PAUSED)
return DMA_PAUSED;
@@ -1543,7 +1528,7 @@ static void pl08x_tasklet(unsigned long data)
if (txd) {
/* Update last completed */
- plchan->lc = txd->tx.cookie;
+ dma_cookie_complete(&txd->tx);
}
/* If a new descriptor is queued, set it up plchan->at is NULL here */
@@ -1724,8 +1709,7 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
chan->name);
chan->chan.device = dmadev;
- chan->chan.cookie = 0;
- chan->lc = 0;
+ dma_cookie_init(&chan->chan);
spin_lock_init(&chan->lock);
INIT_LIST_HEAD(&chan->pend_list);
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index f4aed5fc2cb6..5d225ddc7698 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -27,6 +27,7 @@
#include <linux/of_device.h>
#include "at_hdmac_regs.h"
+#include "dmaengine.h"
/*
* Glossary
@@ -192,27 +193,6 @@ static void atc_desc_chain(struct at_desc **first, struct at_desc **prev,
}
/**
- * atc_assign_cookie - compute and assign new cookie
- * @atchan: channel we work on
- * @desc: descriptor to assign cookie for
- *
- * Called with atchan->lock held and bh disabled
- */
-static dma_cookie_t
-atc_assign_cookie(struct at_dma_chan *atchan, struct at_desc *desc)
-{
- dma_cookie_t cookie = atchan->chan_common.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- atchan->chan_common.cookie = cookie;
- desc->txd.cookie = cookie;
-
- return cookie;
-}
-
-/**
* atc_dostart - starts the DMA engine for real
* @atchan: the channel we want to start
* @first: first descriptor in the list we want to begin with
@@ -269,7 +249,7 @@ atc_chain_complete(struct at_dma_chan *atchan, struct at_desc *desc)
dev_vdbg(chan2dev(&atchan->chan_common),
"descriptor %u complete\n", txd->cookie);
- atchan->completed_cookie = txd->cookie;
+ dma_cookie_complete(txd);
/* move children to free_list */
list_splice_init(&desc->tx_list, &atchan->free_list);
@@ -547,7 +527,7 @@ static dma_cookie_t atc_tx_submit(struct dma_async_tx_descriptor *tx)
unsigned long flags;
spin_lock_irqsave(&atchan->lock, flags);
- cookie = atc_assign_cookie(atchan, desc);
+ cookie = dma_cookie_assign(tx);
if (list_empty(&atchan->active_list)) {
dev_vdbg(chan2dev(tx->chan), "tx_submit: started %u\n",
@@ -1016,26 +996,20 @@ atc_tx_status(struct dma_chan *chan,
spin_lock_irqsave(&atchan->lock, flags);
- last_complete = atchan->completed_cookie;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
atc_cleanup_descriptors(atchan);
- last_complete = atchan->completed_cookie;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
}
+ last_complete = chan->completed_cookie;
+ last_used = chan->cookie;
+
spin_unlock_irqrestore(&atchan->lock, flags);
if (ret != DMA_SUCCESS)
- dma_set_tx_state(txstate, last_complete, last_used,
- atc_first_active(atchan)->len);
- else
- dma_set_tx_state(txstate, last_complete, last_used, 0);
+ dma_set_residue(txstate, atc_first_active(atchan)->len);
if (atc_chan_is_paused(atchan))
ret = DMA_PAUSED;
@@ -1129,7 +1103,7 @@ static int atc_alloc_chan_resources(struct dma_chan *chan)
spin_lock_irqsave(&atchan->lock, flags);
atchan->descs_allocated = i;
list_splice(&tmp_list, &atchan->free_list);
- atchan->completed_cookie = chan->cookie = 1;
+ dma_cookie_init(chan);
spin_unlock_irqrestore(&atchan->lock, flags);
/* channel parameters */
@@ -1329,7 +1303,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
struct at_dma_chan *atchan = &atdma->chan[i];
atchan->chan_common.device = &atdma->dma_common;
- atchan->chan_common.cookie = atchan->completed_cookie = 1;
+ dma_cookie_init(&atchan->chan_common);
list_add_tail(&atchan->chan_common.device_node,
&atdma->dma_common.channels);
diff --git a/drivers/dma/at_hdmac_regs.h b/drivers/dma/at_hdmac_regs.h
index a8d3277d60b5..08fd8a0ae797 100644
--- a/drivers/dma/at_hdmac_regs.h
+++ b/drivers/dma/at_hdmac_regs.h
@@ -208,7 +208,6 @@ enum atc_status {
* @save_dscr: for cyclic operations, preserve next descriptor address in
* the cyclic list on suspend/resume cycle
* @lock: serializes enqueue/dequeue operations to descriptors lists
- * @completed_cookie: identifier for the most recently completed operation
* @active_list: list of descriptors dmaengine is being running on
* @queue: list of descriptors ready to be submitted to engine
* @free_list: list of descriptors usable by the channel
@@ -227,7 +226,6 @@ struct at_dma_chan {
spinlock_t lock;
/* these other elements are all protected by lock */
- dma_cookie_t completed_cookie;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index d65a718c0f9b..187bb9eef4a2 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -24,6 +24,7 @@
#include <mach/coh901318.h>
#include "coh901318_lli.h"
+#include "dmaengine.h"
#define COHC_2_DEV(cohc) (&cohc->chan.dev->device)
@@ -59,7 +60,6 @@ struct coh901318_base {
struct coh901318_chan {
spinlock_t lock;
int allocated;
- int completed;
int id;
int stopped;
@@ -318,20 +318,6 @@ static int coh901318_prep_linked_list(struct coh901318_chan *cohc,
return 0;
}
-static dma_cookie_t
-coh901318_assign_cookie(struct coh901318_chan *cohc,
- struct coh901318_desc *cohd)
-{
- dma_cookie_t cookie = cohc->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- cohc->chan.cookie = cookie;
- cohd->desc.cookie = cookie;
-
- return cookie;
-}
static struct coh901318_desc *
coh901318_desc_get(struct coh901318_chan *cohc)
@@ -705,7 +691,7 @@ static void dma_tasklet(unsigned long data)
callback_param = cohd_fin->desc.callback_param;
/* sign this job as completed on the channel */
- cohc->completed = cohd_fin->desc.cookie;
+ dma_cookie_complete(&cohd_fin->desc);
/* release the lli allocation and remove the descriptor */
coh901318_lli_free(&cohc->base->pool, &cohd_fin->lli);
@@ -929,7 +915,7 @@ static int coh901318_alloc_chan_resources(struct dma_chan *chan)
coh901318_config(cohc, NULL);
cohc->allocated = 1;
- cohc->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
spin_unlock_irqrestore(&cohc->lock, flags);
@@ -966,16 +952,16 @@ coh901318_tx_submit(struct dma_async_tx_descriptor *tx)
desc);
struct coh901318_chan *cohc = to_coh901318_chan(tx->chan);
unsigned long flags;
+ dma_cookie_t cookie;
spin_lock_irqsave(&cohc->lock, flags);
-
- tx->cookie = coh901318_assign_cookie(cohc, cohd);
+ cookie = dma_cookie_assign(tx);
coh901318_desc_queue(cohc, cohd);
spin_unlock_irqrestore(&cohc->lock, flags);
- return tx->cookie;
+ return cookie;
}
static struct dma_async_tx_descriptor *
@@ -1165,17 +1151,12 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct coh901318_chan *cohc = to_coh901318_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
-
- last_complete = cohc->completed;
- last_used = chan->cookie;
+ enum dma_status ret;
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
+ /* FIXME: should be conditional on ret != DMA_SUCCESS? */
+ dma_set_residue(txstate, coh901318_get_bytes_left(chan));
- dma_set_tx_state(txstate, last_complete, last_used,
- coh901318_get_bytes_left(chan));
if (ret == DMA_IN_PROGRESS && cohc->stopped)
ret = DMA_PAUSED;
diff --git a/drivers/dma/dmaengine.h b/drivers/dma/dmaengine.h
new file mode 100644
index 000000000000..17f983a4e9ba
--- /dev/null
+++ b/drivers/dma/dmaengine.h
@@ -0,0 +1,89 @@
+/*
+ * The contents of this file are private to DMA engine drivers, and is not
+ * part of the API to be used by DMA engine users.
+ */
+#ifndef DMAENGINE_H
+#define DMAENGINE_H
+
+#include <linux/bug.h>
+#include <linux/dmaengine.h>
+
+/**
+ * dma_cookie_init - initialize the cookies for a DMA channel
+ * @chan: dma channel to initialize
+ */
+static inline void dma_cookie_init(struct dma_chan *chan)
+{
+ chan->cookie = DMA_MIN_COOKIE;
+ chan->completed_cookie = DMA_MIN_COOKIE;
+}
+
+/**
+ * dma_cookie_assign - assign a DMA engine cookie to the descriptor
+ * @tx: descriptor needing cookie
+ *
+ * Assign a unique non-zero per-channel cookie to the descriptor.
+ * Note: caller is expected to hold a lock to prevent concurrency.
+ */
+static inline dma_cookie_t dma_cookie_assign(struct dma_async_tx_descriptor *tx)
+{
+ struct dma_chan *chan = tx->chan;
+ dma_cookie_t cookie;
+
+ cookie = chan->cookie + 1;
+ if (cookie < DMA_MIN_COOKIE)
+ cookie = DMA_MIN_COOKIE;
+ tx->cookie = chan->cookie = cookie;
+
+ return cookie;
+}
+
+/**
+ * dma_cookie_complete - complete a descriptor
+ * @tx: descriptor to complete
+ *
+ * Mark this descriptor complete by updating the channels completed
+ * cookie marker. Zero the descriptors cookie to prevent accidental
+ * repeated completions.
+ *
+ * Note: caller is expected to hold a lock to prevent concurrency.
+ */
+static inline void dma_cookie_complete(struct dma_async_tx_descriptor *tx)
+{
+ BUG_ON(tx->cookie < DMA_MIN_COOKIE);
+ tx->chan->completed_cookie = tx->cookie;
+ tx->cookie = 0;
+}
+
+/**
+ * dma_cookie_status - report cookie status
+ * @chan: dma channel
+ * @cookie: cookie we are interested in
+ * @state: dma_tx_state structure to return last/used cookies
+ *
+ * Report the status of the cookie, filling in the state structure if
+ * non-NULL. No locking is required.
+ */
+static inline enum dma_status dma_cookie_status(struct dma_chan *chan,
+ dma_cookie_t cookie, struct dma_tx_state *state)
+{
+ dma_cookie_t used, complete;
+
+ used = chan->cookie;
+ complete = chan->completed_cookie;
+ barrier();
+ if (state) {
+ state->last = complete;
+ state->used = used;
+ state->residue = 0;
+ }
+ return dma_async_is_complete(cookie, complete, used);
+}
+
+static inline void dma_set_residue(struct dma_tx_state *state, u32 residue)
+{
+ if (state)
+ state->residue = residue;
+}
+
+#endif
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 0e4b5c6a2f86..cb173bbdcfdf 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -23,6 +23,7 @@
#include <linux/slab.h>
#include "dw_dmac_regs.h"
+#include "dmaengine.h"
/*
* This supports the Synopsys "DesignWare AHB Central DMA Controller",
@@ -156,21 +157,6 @@ static void dwc_desc_put(struct dw_dma_chan *dwc, struct dw_desc *desc)
}
}
-/* Called with dwc->lock held and bh disabled */
-static dma_cookie_t
-dwc_assign_cookie(struct dw_dma_chan *dwc, struct dw_desc *desc)
-{
- dma_cookie_t cookie = dwc->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- dwc->chan.cookie = cookie;
- desc->txd.cookie = cookie;
-
- return cookie;
-}
-
static void dwc_initialize(struct dw_dma_chan *dwc)
{
struct dw_dma *dw = to_dw_dma(dwc->chan.device);
@@ -249,7 +235,7 @@ dwc_descriptor_complete(struct dw_dma_chan *dwc, struct dw_desc *desc,
dev_vdbg(chan2dev(&dwc->chan), "descriptor %u complete\n", txd->cookie);
spin_lock_irqsave(&dwc->lock, flags);
- dwc->completed = txd->cookie;
+ dma_cookie_complete(txd);
if (callback_required) {
callback = txd->callback;
param = txd->callback_param;
@@ -602,7 +588,7 @@ static dma_cookie_t dwc_tx_submit(struct dma_async_tx_descriptor *tx)
unsigned long flags;
spin_lock_irqsave(&dwc->lock, flags);
- cookie = dwc_assign_cookie(dwc, desc);
+ cookie = dma_cookie_assign(tx);
/*
* REVISIT: We should attempt to chain as many descriptors as
@@ -993,28 +979,17 @@ dwc_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct dw_dma_chan *dwc = to_dw_dma_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
-
- last_complete = dwc->completed;
- last_used = chan->cookie;
+ enum dma_status ret;
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
dwc_scan_descriptors(to_dw_dma(chan->device), dwc);
- last_complete = dwc->completed;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
}
if (ret != DMA_SUCCESS)
- dma_set_tx_state(txstate, last_complete, last_used,
- dwc_first_active(dwc)->len);
- else
- dma_set_tx_state(txstate, last_complete, last_used, 0);
+ dma_set_residue(txstate, dwc_first_active(dwc)->len);
if (dwc->paused)
return DMA_PAUSED;
@@ -1046,7 +1021,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan)
return -EIO;
}
- dwc->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
/*
* NOTE: some controllers may have additional features that we
@@ -1474,7 +1449,7 @@ static int __init dw_probe(struct platform_device *pdev)
struct dw_dma_chan *dwc = &dw->chan[i];
dwc->chan.device = &dw->dma;
- dwc->chan.cookie = dwc->completed = 1;
+ dma_cookie_init(&dwc->chan);
if (pdata->chan_allocation_order == CHAN_ALLOCATION_ASCENDING)
list_add_tail(&dwc->chan.device_node,
&dw->dma.channels);
diff --git a/drivers/dma/dw_dmac_regs.h b/drivers/dma/dw_dmac_regs.h
index eec0481a12f7..f298f69ecbf9 100644
--- a/drivers/dma/dw_dmac_regs.h
+++ b/drivers/dma/dw_dmac_regs.h
@@ -158,7 +158,6 @@ struct dw_dma_chan {
/* these other elements are all protected by lock */
unsigned long flags;
- dma_cookie_t completed;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;
diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index 59e7a965772b..f25e83bf5678 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -28,6 +28,8 @@
#include <mach/dma.h>
+#include "dmaengine.h"
+
/* M2P registers */
#define M2P_CONTROL 0x0000
#define M2P_CONTROL_STALLINT BIT(0)
@@ -122,7 +124,6 @@ struct ep93xx_dma_desc {
* @lock: lock protecting the fields following
* @flags: flags for the channel
* @buffer: which buffer to use next (0/1)
- * @last_completed: last completed cookie value
* @active: flattened chain of descriptors currently being processed
* @queue: pending descriptors which are handled next
* @free_list: list of free descriptors which can be used
@@ -157,7 +158,6 @@ struct ep93xx_dma_chan {
#define EP93XX_DMA_IS_CYCLIC 0
int buffer;
- dma_cookie_t last_completed;
struct list_head active;
struct list_head queue;
struct list_head free_list;
@@ -703,7 +703,7 @@ static void ep93xx_dma_tasklet(unsigned long data)
desc = ep93xx_dma_get_active(edmac);
if (desc) {
if (desc->complete) {
- edmac->last_completed = desc->txd.cookie;
+ dma_cookie_complete(&desc->txd);
list_splice_init(&edmac->active, &list);
}
callback = desc->txd.callback;
@@ -783,17 +783,10 @@ static dma_cookie_t ep93xx_dma_tx_submit(struct dma_async_tx_descriptor *tx)
unsigned long flags;
spin_lock_irqsave(&edmac->lock, flags);
-
- cookie = edmac->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
+ cookie = dma_cookie_assign(tx);
desc = container_of(tx, struct ep93xx_dma_desc, txd);
- edmac->chan.cookie = cookie;
- desc->txd.cookie = cookie;
-
/*
* If nothing is currently prosessed, we push this descriptor
* directly to the hardware. Otherwise we put the descriptor
@@ -861,8 +854,7 @@ static int ep93xx_dma_alloc_chan_resources(struct dma_chan *chan)
goto fail_clk_disable;
spin_lock_irq(&edmac->lock);
- edmac->last_completed = 1;
- edmac->chan.cookie = 1;
+ dma_cookie_init(&edmac->chan);
ret = edmac->edma->hw_setup(edmac);
spin_unlock_irq(&edmac->lock);
@@ -1248,18 +1240,13 @@ static enum dma_status ep93xx_dma_tx_status(struct dma_chan *chan,
struct dma_tx_state *state)
{
struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan);
- dma_cookie_t last_used, last_completed;
enum dma_status ret;
unsigned long flags;
spin_lock_irqsave(&edmac->lock, flags);
- last_used = chan->cookie;
- last_completed = edmac->last_completed;
+ ret = dma_cookie_status(chan, cookie, state);
spin_unlock_irqrestore(&edmac->lock, flags);
- ret = dma_async_is_complete(cookie, last_completed, last_used);
- dma_set_tx_state(state, last_completed, last_used, 0);
-
return ret;
}
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index b98070c33ca9..7d7384b34621 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -35,6 +35,7 @@
#include <linux/dmapool.h>
#include <linux/of_platform.h>
+#include "dmaengine.h"
#include "fsldma.h"
#define chan_dbg(chan, fmt, arg...) \
@@ -413,17 +414,10 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
* assign cookies to all of the software descriptors
* that make up this transaction
*/
- cookie = chan->common.cookie;
list_for_each_entry(child, &desc->tx_list, node) {
- cookie++;
- if (cookie < DMA_MIN_COOKIE)
- cookie = DMA_MIN_COOKIE;
-
- child->async_tx.cookie = cookie;
+ cookie = dma_cookie_assign(&child->async_tx);
}
- chan->common.cookie = cookie;
-
/* put this transaction onto the tail of the pending queue */
append_ld_queue(chan, desc);
@@ -984,19 +978,14 @@ static enum dma_status fsl_tx_status(struct dma_chan *dchan,
struct dma_tx_state *txstate)
{
struct fsldma_chan *chan = to_fsl_chan(dchan);
- dma_cookie_t last_complete;
- dma_cookie_t last_used;
+ enum dma_status ret;
unsigned long flags;
spin_lock_irqsave(&chan->desc_lock, flags);
-
- last_complete = chan->completed_cookie;
- last_used = dchan->cookie;
-
+ ret = dma_cookie_status(dchan, cookie, txstate);
spin_unlock_irqrestore(&chan->desc_lock, flags);
- dma_set_tx_state(txstate, last_complete, last_used, 0);
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return ret;
}
/*----------------------------------------------------------------------------*/
@@ -1087,8 +1076,8 @@ static void dma_do_tasklet(unsigned long data)
desc = to_fsl_desc(chan->ld_running.prev);
cookie = desc->async_tx.cookie;
+ dma_cookie_complete(&desc->async_tx);
- chan->completed_cookie = cookie;
chan_dbg(chan, "completed_cookie=%d\n", cookie);
}
@@ -1303,6 +1292,7 @@ static int __devinit fsl_dma_chan_probe(struct fsldma_device *fdev,
chan->idle = true;
chan->common.device = &fdev->common;
+ dma_cookie_init(&chan->common);
/* find the IRQ line, if it exists in the device tree */
chan->irq = irq_of_parse_and_map(node, 0);
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index 9cb5aa57c677..f5c38791fc74 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -137,7 +137,6 @@ struct fsldma_device {
struct fsldma_chan {
char name[8]; /* Channel name */
struct fsldma_chan_regs __iomem *regs;
- dma_cookie_t completed_cookie; /* The maximum cookie completed */
spinlock_t desc_lock; /* Descriptor operation lock */
struct list_head ld_pending; /* Link descriptors queue */
struct list_head ld_running; /* Link descriptors queue */
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index c32103f04fb3..20c1565a7486 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -32,6 +32,7 @@
#include <mach/dma-v1.h>
#include <mach/hardware.h>
+#include "dmaengine.h"
#define IMXDMA_MAX_CHAN_DESCRIPTORS 16
enum imxdma_prep_type {
@@ -77,7 +78,8 @@ struct imxdma_channel {
u32 watermark_level;
struct dma_chan chan;
spinlock_t lock;
- dma_cookie_t last_completed;
+ struct dma_async_tx_descriptor desc;
+ enum dma_status status;
int dma_request;
struct scatterlist *sg_list;
};
@@ -192,7 +194,7 @@ static void imxdma_tasklet(unsigned long data)
if (desc->desc.callback)
desc->desc.callback(desc->desc.callback_param);
- imxdmac->last_completed = desc->desc.cookie;
+ dma_cookie_complete(&desc->desc);
/* If we are dealing with a cyclic descriptor keep it on ld_active */
if (imxdma_chan_is_doing_cyclic(imxdmac))
@@ -276,31 +278,7 @@ static enum dma_status imxdma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
- struct imxdma_channel *imxdmac = to_imxdma_chan(chan);
- dma_cookie_t last_used;
- enum dma_status ret;
- unsigned long flags;
-
- spin_lock_irqsave(&imxdmac->lock, flags);
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, imxdmac->last_completed, last_used);
- dma_set_tx_state(txstate, imxdmac->last_completed, last_used, 0);
- spin_unlock_irqrestore(&imxdmac->lock, flags);
-
- return ret;
-}
-
-static dma_cookie_t imxdma_assign_cookie(struct imxdma_channel *imxdma)
-{
- dma_cookie_t cookie = imxdma->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- imxdma->chan.cookie = cookie;
-
- return cookie;
+ return dma_cookie_status(chan, cookie, txstate);
}
static dma_cookie_t imxdma_tx_submit(struct dma_async_tx_descriptor *tx)
@@ -310,11 +288,7 @@ static dma_cookie_t imxdma_tx_submit(struct dma_async_tx_descriptor *tx)
unsigned long flags;
spin_lock_irqsave(&imxdmac->lock, flags);
-
- list_move_tail(imxdmac->ld_free.next, &imxdmac->ld_queue);
- cookie = imxdma_assign_cookie(imxdmac);
- tx->cookie = cookie;
-
+ cookie = dma_cookie_assign(tx);
spin_unlock_irqrestore(&imxdmac->lock, flags);
return cookie;
@@ -583,6 +557,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
tasklet_init(&imxdmac->dma_tasklet, imxdma_tasklet,
(unsigned long)imxdmac);
imxdmac->chan.device = &imxdma->dma_device;
+ dma_cookie_init(&imxdmac->chan);
imxdmac->channel = i;
/* Add the channel to the DMAC list */
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index f0bfc0e07416..5da552d1f92d 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -43,6 +43,8 @@
#include <mach/dma.h>
#include <mach/hardware.h>
+#include "dmaengine.h"
+
/* SDMA registers */
#define SDMA_H_C0PTR 0x000
#define SDMA_H_INTR 0x004
@@ -267,7 +269,6 @@ struct sdma_channel {
struct dma_chan chan;
spinlock_t lock;
struct dma_async_tx_descriptor desc;
- dma_cookie_t last_completed;
enum dma_status status;
unsigned int chn_count;
unsigned int chn_real_count;
@@ -529,7 +530,7 @@ static void mxc_sdma_handle_channel_normal(struct sdma_channel *sdmac)
else
sdmac->status = DMA_SUCCESS;
- sdmac->last_completed = sdmac->desc.cookie;
+ dma_cookie_complete(&sdmac->desc);
if (sdmac->desc.callback)
sdmac->desc.callback(sdmac->desc.callback_param);
}
@@ -814,19 +815,6 @@ out:
return ret;
}
-static dma_cookie_t sdma_assign_cookie(struct sdma_channel *sdmac)
-{
- dma_cookie_t cookie = sdmac->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- sdmac->chan.cookie = cookie;
- sdmac->desc.cookie = cookie;
-
- return cookie;
-}
-
static struct sdma_channel *to_sdma_chan(struct dma_chan *chan)
{
return container_of(chan, struct sdma_channel, chan);
@@ -840,7 +828,7 @@ static dma_cookie_t sdma_tx_submit(struct dma_async_tx_descriptor *tx)
spin_lock_irqsave(&sdmac->lock, flags);
- cookie = sdma_assign_cookie(sdmac);
+ cookie = dma_cookie_assign(tx);
spin_unlock_irqrestore(&sdmac->lock, flags);
@@ -1127,7 +1115,7 @@ static enum dma_status sdma_tx_status(struct dma_chan *chan,
last_used = chan->cookie;
- dma_set_tx_state(txstate, sdmac->last_completed, last_used,
+ dma_set_tx_state(txstate, chan->completed_cookie, last_used,
sdmac->chn_count - sdmac->chn_real_count);
return sdmac->status;
@@ -1368,6 +1356,7 @@ static int __init sdma_probe(struct platform_device *pdev)
spin_lock_init(&sdmac->lock);
sdmac->chan.device = &sdma->dma_device;
+ dma_cookie_init(&sdmac->chan);
sdmac->channel = i;
/*
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index 923476d74a5d..2449812f5464 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -29,6 +29,8 @@
#include <linux/intel_mid_dma.h>
#include <linux/module.h>
+#include "dmaengine.h"
+
#define MAX_CHAN 4 /*max ch across controllers*/
#include "intel_mid_dma_regs.h"
@@ -288,7 +290,7 @@ static void midc_descriptor_complete(struct intel_mid_dma_chan *midc,
struct intel_mid_dma_lli *llitem;
void *param_txd = NULL;
- midc->completed = txd->cookie;
+ dma_cookie_complete(txd);
callback_txd = txd->callback;
param_txd = txd->callback_param;
@@ -434,14 +436,7 @@ static dma_cookie_t intel_mid_dma_tx_submit(struct dma_async_tx_descriptor *tx)
dma_cookie_t cookie;
spin_lock_bh(&midc->lock);
- cookie = midc->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- midc->chan.cookie = cookie;
- desc->txd.cookie = cookie;
-
+ cookie = dma_cookie_assign(tx);
if (list_empty(&midc->active_list))
list_add_tail(&desc->desc_node, &midc->active_list);
@@ -482,31 +477,18 @@ static enum dma_status intel_mid_dma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
- struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
-
- last_complete = midc->completed;
- last_used = chan->cookie;
+ struct intel_mid_dma_chan *midc = to_intel_mid_dma_chan(chan);
+ enum dma_status ret;
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&midc->lock);
midc_scan_descriptors(to_middma_device(chan->device), midc);
spin_unlock_bh(&midc->lock);
- last_complete = midc->completed;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
}
- if (txstate) {
- txstate->last = last_complete;
- txstate->used = last_used;
- txstate->residue = 0;
- }
return ret;
}
@@ -886,7 +868,7 @@ static int intel_mid_dma_alloc_chan_resources(struct dma_chan *chan)
pm_runtime_put(&mid->pdev->dev);
return -EIO;
}
- midc->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
spin_lock_bh(&midc->lock);
while (midc->descs_allocated < DESCS_PER_CHANNEL) {
@@ -1119,7 +1101,7 @@ static int mid_setup_dma(struct pci_dev *pdev)
struct intel_mid_dma_chan *midch = &dma->ch[i];
midch->chan.device = &dma->common;
- midch->chan.cookie = 1;
+ dma_cookie_init(&midch->chan);
midch->ch_id = dma->chan_base + i;
pr_debug("MDMA:Init CH %d, ID %d\n", i, midch->ch_id);
diff --git a/drivers/dma/intel_mid_dma_regs.h b/drivers/dma/intel_mid_dma_regs.h
index c83d35b97bd8..1bfa9268feaf 100644
--- a/drivers/dma/intel_mid_dma_regs.h
+++ b/drivers/dma/intel_mid_dma_regs.h
@@ -165,7 +165,6 @@ union intel_mid_dma_cfg_hi {
* @dma_base: MMIO register space DMA engine base pointer
* @ch_id: DMA channel id
* @lock: channel spinlock
- * @completed: DMA cookie
* @active_list: current active descriptors
* @queue: current queued up descriptors
* @free_list: current free descriptors
@@ -183,7 +182,6 @@ struct intel_mid_dma_chan {
void __iomem *dma_base;
int ch_id;
spinlock_t lock;
- dma_cookie_t completed;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index a4d6cb0c0343..31493d80e0e9 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -40,6 +40,8 @@
#include "registers.h"
#include "hw.h"
+#include "../dmaengine.h"
+
int ioat_pending_level = 4;
module_param(ioat_pending_level, int, 0644);
MODULE_PARM_DESC(ioat_pending_level,
@@ -107,6 +109,7 @@ void ioat_init_channel(struct ioatdma_device *device, struct ioat_chan_common *c
chan->reg_base = device->reg_base + (0x80 * (idx + 1));
spin_lock_init(&chan->cleanup_lock);
chan->common.device = dma;
+ dma_cookie_init(&chan->common);
list_add_tail(&chan->common.device_node, &dma->channels);
device->idx[idx] = chan;
init_timer(&chan->timer);
@@ -235,12 +238,7 @@ static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
spin_lock_bh(&ioat->desc_lock);
/* cookie incr and addition to used_list must be atomic */
- cookie = c->cookie;
- cookie++;
- if (cookie < 0)
- cookie = 1;
- c->cookie = cookie;
- tx->cookie = cookie;
+ cookie = dma_cookie_assign(tx);
dev_dbg(to_dev(&ioat->base), "%s: cookie: %d\n", __func__, cookie);
/* write address into NextDescriptor field of last desc in chain */
@@ -603,8 +601,7 @@ static void __cleanup(struct ioat_dma_chan *ioat, unsigned long phys_complete)
*/
dump_desc_dbg(ioat, desc);
if (tx->cookie) {
- chan->completed_cookie = tx->cookie;
- tx->cookie = 0;
+ dma_cookie_complete(tx);
ioat_dma_unmap(chan, tx->flags, desc->len, desc->hw);
ioat->active -= desc->hw->tx_cnt;
if (tx->callback) {
@@ -733,13 +730,15 @@ ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
{
struct ioat_chan_common *chan = to_chan_common(c);
struct ioatdma_device *device = chan->device;
+ enum dma_status ret;
- if (ioat_tx_status(c, cookie, txstate) == DMA_SUCCESS)
- return DMA_SUCCESS;
+ ret = dma_cookie_status(c, cookie, txstate);
+ if (ret == DMA_SUCCESS)
+ return ret;
device->cleanup_fn((unsigned long) c);
- return ioat_tx_status(c, cookie, txstate);
+ return dma_cookie_status(c, cookie, txstate);
}
static void ioat1_dma_start_null_desc(struct ioat_dma_chan *ioat)
diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h
index 5216c8a92a21..c7888bccd974 100644
--- a/drivers/dma/ioat/dma.h
+++ b/drivers/dma/ioat/dma.h
@@ -90,7 +90,6 @@ struct ioat_chan_common {
void __iomem *reg_base;
unsigned long last_completion;
spinlock_t cleanup_lock;
- dma_cookie_t completed_cookie;
unsigned long state;
#define IOAT_COMPLETION_PENDING 0
#define IOAT_COMPLETION_ACK 1
@@ -143,28 +142,6 @@ static inline struct ioat_dma_chan *to_ioat_chan(struct dma_chan *c)
return container_of(chan, struct ioat_dma_chan, base);
}
-/**
- * ioat_tx_status - poll the status of an ioat transaction
- * @c: channel handle
- * @cookie: transaction identifier
- * @txstate: if set, updated with the transaction state
- */
-static inline enum dma_status
-ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct ioat_chan_common *chan = to_chan_common(c);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
-
- last_used = c->cookie;
- last_complete = chan->completed_cookie;
-
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
- return dma_async_is_complete(cookie, last_complete, last_used);
-}
-
/* wrapper around hardware descriptor format + additional software fields */
/**
diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c
index 5d65f8377971..e8e110ff3d96 100644
--- a/drivers/dma/ioat/dma_v2.c
+++ b/drivers/dma/ioat/dma_v2.c
@@ -41,6 +41,8 @@
#include "registers.h"
#include "hw.h"
+#include "../dmaengine.h"
+
int ioat_ring_alloc_order = 8;
module_param(ioat_ring_alloc_order, int, 0644);
MODULE_PARM_DESC(ioat_ring_alloc_order,
@@ -147,8 +149,7 @@ static void __cleanup(struct ioat2_dma_chan *ioat, unsigned long phys_complete)
dump_desc_dbg(ioat, desc);
if (tx->cookie) {
ioat_dma_unmap(chan, tx->flags, desc->len, desc->hw);
- chan->completed_cookie = tx->cookie;
- tx->cookie = 0;
+ dma_cookie_complete(tx);
if (tx->callback) {
tx->callback(tx->callback_param);
tx->callback = NULL;
@@ -398,13 +399,9 @@ static dma_cookie_t ioat2_tx_submit_unlock(struct dma_async_tx_descriptor *tx)
struct dma_chan *c = tx->chan;
struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
struct ioat_chan_common *chan = &ioat->base;
- dma_cookie_t cookie = c->cookie;
+ dma_cookie_t cookie;
- cookie++;
- if (cookie < 0)
- cookie = 1;
- tx->cookie = cookie;
- c->cookie = cookie;
+ cookie = dma_cookie_assign(tx);
dev_dbg(to_dev(&ioat->base), "%s: cookie: %d\n", __func__, cookie);
if (!test_and_set_bit(IOAT_COMPLETION_PENDING, &chan->state))
diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c
index f519c93a61e7..2c4476c0e405 100644
--- a/drivers/dma/ioat/dma_v3.c
+++ b/drivers/dma/ioat/dma_v3.c
@@ -61,6 +61,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/prefetch.h>
+#include "../dmaengine.h"
#include "registers.h"
#include "hw.h"
#include "dma.h"
@@ -277,9 +278,8 @@ static void __cleanup(struct ioat2_dma_chan *ioat, unsigned long phys_complete)
dump_desc_dbg(ioat, desc);
tx = &desc->txd;
if (tx->cookie) {
- chan->completed_cookie = tx->cookie;
+ dma_cookie_complete(tx);
ioat3_dma_unmap(ioat, desc, idx + i);
- tx->cookie = 0;
if (tx->callback) {
tx->callback(tx->callback_param);
tx->callback = NULL;
@@ -411,13 +411,15 @@ ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
+ enum dma_status ret;
- if (ioat_tx_status(c, cookie, txstate) == DMA_SUCCESS)
- return DMA_SUCCESS;
+ ret = dma_cookie_status(c, cookie, txstate);
+ if (ret == DMA_SUCCESS)
+ return ret;
ioat3_cleanup(ioat);
- return ioat_tx_status(c, cookie, txstate);
+ return dma_cookie_status(c, cookie, txstate);
}
static struct dma_async_tx_descriptor *
diff --git a/drivers/dma/iop-adma.c b/drivers/dma/iop-adma.c
index 04be90b645b8..4499f88789bc 100644
--- a/drivers/dma/iop-adma.c
+++ b/drivers/dma/iop-adma.c
@@ -36,6 +36,8 @@
#include <mach/adma.h>
+#include "dmaengine.h"
+
#define to_iop_adma_chan(chan) container_of(chan, struct iop_adma_chan, common)
#define to_iop_adma_device(dev) \
container_of(dev, struct iop_adma_device, common)
@@ -317,7 +319,7 @@ static void __iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
}
if (cookie > 0) {
- iop_chan->completed_cookie = cookie;
+ iop_chan->common.completed_cookie = cookie;
pr_debug("\tcompleted cookie %d\n", cookie);
}
}
@@ -438,18 +440,6 @@ retry:
return NULL;
}
-static dma_cookie_t
-iop_desc_assign_cookie(struct iop_adma_chan *iop_chan,
- struct iop_adma_desc_slot *desc)
-{
- dma_cookie_t cookie = iop_chan->common.cookie;
- cookie++;
- if (cookie < 0)
- cookie = 1;
- iop_chan->common.cookie = desc->async_tx.cookie = cookie;
- return cookie;
-}
-
static void iop_adma_check_threshold(struct iop_adma_chan *iop_chan)
{
dev_dbg(iop_chan->device->common.dev, "pending: %d\n",
@@ -477,7 +467,7 @@ iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
slots_per_op = grp_start->slots_per_op;
spin_lock_bh(&iop_chan->lock);
- cookie = iop_desc_assign_cookie(iop_chan, sw_desc);
+ cookie = dma_cookie_assign(tx);
old_chain_tail = list_entry(iop_chan->chain.prev,
struct iop_adma_desc_slot, chain_node);
@@ -904,24 +894,15 @@ static enum dma_status iop_adma_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- enum dma_status ret;
-
- last_used = chan->cookie;
- last_complete = iop_chan->completed_cookie;
- dma_set_tx_state(txstate, last_complete, last_used, 0);
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ int ret;
+
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
iop_adma_slot_cleanup(iop_chan);
- last_used = chan->cookie;
- last_complete = iop_chan->completed_cookie;
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return dma_cookie_status(chan, cookie, txstate);
}
static irqreturn_t iop_adma_eot_handler(int irq, void *data)
@@ -1565,6 +1546,7 @@ static int __devinit iop_adma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&iop_chan->chain);
INIT_LIST_HEAD(&iop_chan->all_slots);
iop_chan->common.device = dma_dev;
+ dma_cookie_init(&iop_chan->common);
list_add_tail(&iop_chan->common.device_node, &dma_dev->channels);
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
@@ -1642,16 +1624,12 @@ static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan)
iop_desc_set_dest_addr(grp_start, iop_chan, 0);
iop_desc_set_memcpy_src_addr(grp_start, 0);
- cookie = iop_chan->common.cookie;
- cookie++;
- if (cookie <= 1)
- cookie = 2;
+ cookie = dma_cookie_assign(&sw_desc->async_tx);
/* initialize the completed cookie to be less than
* the most recently used cookie
*/
- iop_chan->completed_cookie = cookie - 1;
- iop_chan->common.cookie = sw_desc->async_tx.cookie = cookie;
+ iop_chan->common.completed_cookie = cookie - 1;
/* channel should not be busy */
BUG_ON(iop_chan_is_busy(iop_chan));
@@ -1699,16 +1677,12 @@ static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan)
iop_desc_set_xor_src_addr(grp_start, 0, 0);
iop_desc_set_xor_src_addr(grp_start, 1, 0);
- cookie = iop_chan->common.cookie;
- cookie++;
- if (cookie <= 1)
- cookie = 2;
+ cookie = dma_cookie_assign(&sw_desc->async_tx);
/* initialize the completed cookie to be less than
* the most recently used cookie
*/
- iop_chan->completed_cookie = cookie - 1;
- iop_chan->common.cookie = sw_desc->async_tx.cookie = cookie;
+ iop_chan->common.completed_cookie = cookie - 1;
/* channel should not be busy */
BUG_ON(iop_chan_is_busy(iop_chan));
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index 6212b16e8cf2..1880274b0850 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -25,6 +25,7 @@
#include <mach/ipu.h>
+#include "../dmaengine.h"
#include "ipu_intern.h"
#define FS_VF_IN_VALID 0x00000002
@@ -866,14 +867,7 @@ static dma_cookie_t idmac_tx_submit(struct dma_async_tx_descriptor *tx)
dev_dbg(dev, "Submitting sg %p\n", &desc->sg[0]);
- cookie = ichan->dma_chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- /* from dmaengine.h: "last cookie value returned to client" */
- ichan->dma_chan.cookie = cookie;
- tx->cookie = cookie;
+ cookie = dma_cookie_assign(tx);
/* ipu->lock can be taken under ichan->lock, but not v.v. */
spin_lock_irqsave(&ichan->lock, flags);
@@ -1295,7 +1289,7 @@ static irqreturn_t idmac_interrupt(int irq, void *dev_id)
/* Flip the active buffer - even if update above failed */
ichan->active_buffer = !ichan->active_buffer;
if (done)
- ichan->completed = desc->txd.cookie;
+ dma_cookie_complete(&desc->txd);
callback = desc->txd.callback;
callback_param = desc->txd.callback_param;
@@ -1510,8 +1504,7 @@ static int idmac_alloc_chan_resources(struct dma_chan *chan)
BUG_ON(chan->client_count > 1);
WARN_ON(ichan->status != IPU_CHANNEL_FREE);
- chan->cookie = 1;
- ichan->completed = -ENXIO;
+ dma_cookie_init(chan);
ret = ipu_irq_map(chan->chan_id);
if (ret < 0)
@@ -1600,9 +1593,7 @@ static void idmac_free_chan_resources(struct dma_chan *chan)
static enum dma_status idmac_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
- struct idmac_channel *ichan = to_idmac_chan(chan);
-
- dma_set_tx_state(txstate, ichan->completed, chan->cookie, 0);
+ dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie, 0);
if (cookie != chan->cookie)
return DMA_ERROR;
return DMA_SUCCESS;
@@ -1638,11 +1629,10 @@ static int __init ipu_idmac_init(struct ipu *ipu)
ichan->status = IPU_CHANNEL_FREE;
ichan->sec_chan_en = false;
- ichan->completed = -ENXIO;
snprintf(ichan->eof_name, sizeof(ichan->eof_name), "IDMAC EOF %d", i);
dma_chan->device = &idmac->dma;
- dma_chan->cookie = 1;
+ dma_cookie_init(dma_chan);
dma_chan->chan_id = i;
list_add_tail(&dma_chan->device_node, &dma->channels);
}
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c
index 4d6d4cf66949..2ab0a3d0eed5 100644
--- a/drivers/dma/mpc512x_dma.c
+++ b/drivers/dma/mpc512x_dma.c
@@ -44,6 +44,8 @@
#include <linux/random.h>
+#include "dmaengine.h"
+
/* Number of DMA Transfer descriptors allocated per channel */
#define MPC_DMA_DESCRIPTORS 64
@@ -188,7 +190,6 @@ struct mpc_dma_chan {
struct list_head completed;
struct mpc_dma_tcd *tcd;
dma_addr_t tcd_paddr;
- dma_cookie_t completed_cookie;
/* Lock for this structure */
spinlock_t lock;
@@ -365,7 +366,7 @@ static void mpc_dma_process_completed(struct mpc_dma *mdma)
/* Free descriptors */
spin_lock_irqsave(&mchan->lock, flags);
list_splice_tail_init(&list, &mchan->free);
- mchan->completed_cookie = last_cookie;
+ mchan->chan.completed_cookie = last_cookie;
spin_unlock_irqrestore(&mchan->lock, flags);
}
}
@@ -438,13 +439,7 @@ static dma_cookie_t mpc_dma_tx_submit(struct dma_async_tx_descriptor *txd)
mpc_dma_execute(mchan);
/* Update cookie */
- cookie = mchan->chan.cookie + 1;
- if (cookie <= 0)
- cookie = 1;
-
- mchan->chan.cookie = cookie;
- mdesc->desc.cookie = cookie;
-
+ cookie = dma_cookie_assign(txd);
spin_unlock_irqrestore(&mchan->lock, flags);
return cookie;
@@ -562,17 +557,14 @@ mpc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct mpc_dma_chan *mchan = dma_chan_to_mpc_dma_chan(chan);
+ enum dma_status ret;
unsigned long flags;
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
spin_lock_irqsave(&mchan->lock, flags);
- last_used = mchan->chan.cookie;
- last_complete = mchan->completed_cookie;
+ ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irqrestore(&mchan->lock, flags);
- dma_set_tx_state(txstate, last_complete, last_used, 0);
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return ret;
}
/* Prepare descriptor for memory to memory copy */
@@ -741,8 +733,7 @@ static int __devinit mpc_dma_probe(struct platform_device *op)
mchan = &mdma->channels[i];
mchan->chan.device = dma;
- mchan->chan.cookie = 1;
- mchan->completed_cookie = mchan->chan.cookie;
+ dma_cookie_init(&mchan->chan);
INIT_LIST_HEAD(&mchan->free);
INIT_LIST_HEAD(&mchan->prepared);
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index e779b434af45..fa5d55fea46c 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -26,6 +26,8 @@
#include <linux/platform_device.h>
#include <linux/memory.h>
#include <plat/mv_xor.h>
+
+#include "dmaengine.h"
#include "mv_xor.h"
static void mv_xor_issue_pending(struct dma_chan *chan);
@@ -435,7 +437,7 @@ static void __mv_xor_slot_cleanup(struct mv_xor_chan *mv_chan)
}
if (cookie > 0)
- mv_chan->completed_cookie = cookie;
+ mv_chan->common.completed_cookie = cookie;
}
static void
@@ -534,18 +536,6 @@ retry:
return NULL;
}
-static dma_cookie_t
-mv_desc_assign_cookie(struct mv_xor_chan *mv_chan,
- struct mv_xor_desc_slot *desc)
-{
- dma_cookie_t cookie = mv_chan->common.cookie;
-
- if (++cookie < 0)
- cookie = 1;
- mv_chan->common.cookie = desc->async_tx.cookie = cookie;
- return cookie;
-}
-
/************************ DMA engine API functions ****************************/
static dma_cookie_t
mv_xor_tx_submit(struct dma_async_tx_descriptor *tx)
@@ -563,7 +553,7 @@ mv_xor_tx_submit(struct dma_async_tx_descriptor *tx)
grp_start = sw_desc->group_head;
spin_lock_bh(&mv_chan->lock);
- cookie = mv_desc_assign_cookie(mv_chan, sw_desc);
+ cookie = dma_cookie_assign(tx);
if (list_empty(&mv_chan->chain))
list_splice_init(&sw_desc->tx_list, &mv_chan->chain);
@@ -820,27 +810,16 @@ static enum dma_status mv_xor_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct mv_xor_chan *mv_chan = to_mv_xor_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
enum dma_status ret;
- last_used = chan->cookie;
- last_complete = mv_chan->completed_cookie;
- mv_chan->is_complete_cookie = cookie;
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS) {
mv_xor_clean_completed_slots(mv_chan);
return ret;
}
mv_xor_slot_cleanup(mv_chan);
- last_used = chan->cookie;
- last_complete = mv_chan->completed_cookie;
-
- dma_set_tx_state(txstate, last_complete, last_used, 0);
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return dma_cookie_status(chan, cookie, txstate);
}
static void mv_dump_xor_regs(struct mv_xor_chan *chan)
@@ -1214,6 +1193,7 @@ static int __devinit mv_xor_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&mv_chan->completed_slots);
INIT_LIST_HEAD(&mv_chan->all_slots);
mv_chan->common.device = dma_dev;
+ dma_cookie_init(&mv_chan->common);
list_add_tail(&mv_chan->common.device_node, &dma_dev->channels);
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index 977b592e976b..654876b7ba1d 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -78,7 +78,6 @@ struct mv_xor_device {
/**
* struct mv_xor_chan - internal representation of a XOR channel
* @pending: allows batching of hardware operations
- * @completed_cookie: identifier for the most recently completed operation
* @lock: serializes enqueue/dequeue operations to the descriptors pool
* @mmr_base: memory mapped register base
* @idx: the index of the xor channel
@@ -93,7 +92,6 @@ struct mv_xor_device {
*/
struct mv_xor_chan {
int pending;
- dma_cookie_t completed_cookie;
spinlock_t lock; /* protects the descriptor slot pool */
void __iomem *mmr_base;
unsigned int idx;
@@ -109,7 +107,6 @@ struct mv_xor_chan {
#ifdef USE_TIMER
unsigned long cleanup_time;
u32 current_on_last_cleanup;
- dma_cookie_t is_complete_cookie;
#endif
};
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index b06cd4ca626f..a2267f9ab568 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -28,6 +28,8 @@
#include <mach/dma.h>
#include <mach/common.h>
+#include "dmaengine.h"
+
/*
* NOTE: The term "PIO" throughout the mxs-dma implementation means
* PIO mode of mxs apbh-dma and apbx-dma. With this working mode,
@@ -111,7 +113,6 @@ struct mxs_dma_chan {
struct mxs_dma_ccw *ccw;
dma_addr_t ccw_phys;
int desc_count;
- dma_cookie_t last_completed;
enum dma_status status;
unsigned int flags;
#define MXS_DMA_SG_LOOP (1 << 0)
@@ -193,19 +194,6 @@ static void mxs_dma_resume_chan(struct mxs_dma_chan *mxs_chan)
mxs_chan->status = DMA_IN_PROGRESS;
}
-static dma_cookie_t mxs_dma_assign_cookie(struct mxs_dma_chan *mxs_chan)
-{
- dma_cookie_t cookie = mxs_chan->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- mxs_chan->chan.cookie = cookie;
- mxs_chan->desc.cookie = cookie;
-
- return cookie;
-}
-
static struct mxs_dma_chan *to_mxs_dma_chan(struct dma_chan *chan)
{
return container_of(chan, struct mxs_dma_chan, chan);
@@ -217,7 +205,7 @@ static dma_cookie_t mxs_dma_tx_submit(struct dma_async_tx_descriptor *tx)
mxs_dma_enable_chan(mxs_chan);
- return mxs_dma_assign_cookie(mxs_chan);
+ return dma_cookie_assign(tx);
}
static void mxs_dma_tasklet(unsigned long data)
@@ -274,7 +262,7 @@ static irqreturn_t mxs_dma_int_handler(int irq, void *dev_id)
stat1 &= ~(1 << channel);
if (mxs_chan->status == DMA_SUCCESS)
- mxs_chan->last_completed = mxs_chan->desc.cookie;
+ dma_cookie_complete(&mxs_chan->desc);
/* schedule tasklet on this channel */
tasklet_schedule(&mxs_chan->tasklet);
@@ -538,7 +526,7 @@ static enum dma_status mxs_dma_tx_status(struct dma_chan *chan,
dma_cookie_t last_used;
last_used = chan->cookie;
- dma_set_tx_state(txstate, mxs_chan->last_completed, last_used, 0);
+ dma_set_tx_state(txstate, chan->completed_cookie, last_used, 0);
return mxs_chan->status;
}
@@ -630,6 +618,7 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
mxs_chan->mxs_dma = mxs_dma;
mxs_chan->chan.device = &mxs_dma->dma_device;
+ dma_cookie_init(&mxs_chan->chan);
tasklet_init(&mxs_chan->tasklet, mxs_dma_tasklet,
(unsigned long) mxs_chan);
diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 823f58179f9d..c93bb0459972 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -25,6 +25,8 @@
#include <linux/module.h>
#include <linux/pch_dma.h>
+#include "dmaengine.h"
+
#define DRV_NAME "pch-dma"
#define DMA_CTL0_DISABLE 0x0
@@ -105,7 +107,6 @@ struct pch_dma_chan {
spinlock_t lock;
- dma_cookie_t completed_cookie;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;
@@ -416,20 +417,6 @@ static void pdc_advance_work(struct pch_dma_chan *pd_chan)
}
}
-static dma_cookie_t pdc_assign_cookie(struct pch_dma_chan *pd_chan,
- struct pch_dma_desc *desc)
-{
- dma_cookie_t cookie = pd_chan->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- pd_chan->chan.cookie = cookie;
- desc->txd.cookie = cookie;
-
- return cookie;
-}
-
static dma_cookie_t pd_tx_submit(struct dma_async_tx_descriptor *txd)
{
struct pch_dma_desc *desc = to_pd_desc(txd);
@@ -437,7 +424,7 @@ static dma_cookie_t pd_tx_submit(struct dma_async_tx_descriptor *txd)
dma_cookie_t cookie;
spin_lock(&pd_chan->lock);
- cookie = pdc_assign_cookie(pd_chan, desc);
+ cookie = dma_cookie_assign(txd);
if (list_empty(&pd_chan->active_list)) {
list_add_tail(&desc->desc_node, &pd_chan->active_list);
@@ -544,7 +531,7 @@ static int pd_alloc_chan_resources(struct dma_chan *chan)
spin_lock_irq(&pd_chan->lock);
list_splice(&tmp_list, &pd_chan->free_list);
pd_chan->descs_allocated = i;
- pd_chan->completed_cookie = chan->cookie = 1;
+ dma_cookie_init(chan);
spin_unlock_irq(&pd_chan->lock);
pdc_enable_irq(chan, 1);
@@ -578,19 +565,12 @@ static enum dma_status pd_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct pch_dma_chan *pd_chan = to_pd_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_completed;
- int ret;
+ enum dma_status ret;
spin_lock_irq(&pd_chan->lock);
- last_completed = pd_chan->completed_cookie;
- last_used = chan->cookie;
+ ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irq(&pd_chan->lock);
- ret = dma_async_is_complete(cookie, last_completed, last_used);
-
- dma_set_tx_state(txstate, last_completed, last_used, 0);
-
return ret;
}
@@ -932,7 +912,7 @@ static int __devinit pch_dma_probe(struct pci_dev *pdev,
struct pch_dma_chan *pd_chan = &pd->channels[i];
pd_chan->chan.device = &pd->dma;
- pd_chan->chan.cookie = 1;
+ dma_cookie_init(&pd_chan->chan);
pd_chan->membase = &regs->desc[i];
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 7253d17f05f8..e863d7fc465a 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -28,6 +28,7 @@
#include <linux/scatterlist.h>
#include <linux/of.h>
+#include "dmaengine.h"
#define PL330_MAX_CHAN 8
#define PL330_MAX_IRQS 32
#define PL330_MAX_PERI 32
@@ -285,6 +286,7 @@ static unsigned cmd_line;
#endif
/* The number of default descriptors */
+
#define NR_DEFAULT_DESC 16
/* Populated by the PL330 core driver for DMA API driver's info */
@@ -545,9 +547,6 @@ struct dma_pl330_chan {
/* DMA-Engine Channel */
struct dma_chan chan;
- /* Last completed cookie */
- dma_cookie_t completed;
-
/* List of to be xfered descriptors */
struct list_head work_list;
@@ -2320,7 +2319,7 @@ static void pl330_tasklet(unsigned long data)
/* Pick up ripe tomatoes */
list_for_each_entry_safe(desc, _dt, &pch->work_list, node)
if (desc->status == DONE) {
- pch->completed = desc->txd.cookie;
+ dma_cookie_complete(&desc->txd);
list_move_tail(&desc->node, &list);
}
@@ -2391,7 +2390,7 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
spin_lock_irqsave(&pch->lock, flags);
- pch->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
pch->cyclic = false;
pch->pl330_chid = pl330_request_channel(&pdmac->pif);
@@ -2426,7 +2425,6 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned
/* Mark all desc done */
list_for_each_entry_safe(desc, _dt, &pch->work_list , node) {
desc->status = DONE;
- pch->completed = desc->txd.cookie;
list_move_tail(&desc->node, &list);
}
@@ -2482,18 +2480,7 @@ static enum dma_status
pl330_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
- struct dma_pl330_chan *pch = to_pchan(chan);
- dma_cookie_t last_done, last_used;
- int ret;
-
- last_done = pch->completed;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_done, last_used);
-
- dma_set_tx_state(txstate, last_done, last_used, 0);
-
- return ret;
+ return dma_cookie_status(chan, cookie, txstate);
}
static void pl330_issue_pending(struct dma_chan *chan)
@@ -2516,26 +2503,16 @@ static dma_cookie_t pl330_tx_submit(struct dma_async_tx_descriptor *tx)
spin_lock_irqsave(&pch->lock, flags);
/* Assign cookies to all nodes */
- cookie = tx->chan->cookie;
-
while (!list_empty(&last->node)) {
desc = list_entry(last->node.next, struct dma_pl330_desc, node);
- if (++cookie < 0)
- cookie = 1;
- desc->txd.cookie = cookie;
+ dma_cookie_assign(&desc->txd);
list_move_tail(&desc->node, &pch->work_list);
}
- if (++cookie < 0)
- cookie = 1;
- last->txd.cookie = cookie;
-
+ cookie = dma_cookie_assign(&last->txd);
list_add_tail(&last->node, &pch->work_list);
-
- tx->chan->cookie = cookie;
-
spin_unlock_irqrestore(&pch->lock, flags);
return cookie;
diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index fc457a7e8832..ced98826684a 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -46,6 +46,7 @@
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#include "adma.h"
+#include "../dmaengine.h"
enum ppc_adma_init_code {
PPC_ADMA_INIT_OK = 0,
@@ -1930,7 +1931,7 @@ static void __ppc440spe_adma_slot_cleanup(struct ppc440spe_adma_chan *chan)
if (end_of_chain && slot_cnt) {
/* Should wait for ZeroSum completion */
if (cookie > 0)
- chan->completed_cookie = cookie;
+ chan->common.completed_cookie = cookie;
return;
}
@@ -1960,7 +1961,7 @@ static void __ppc440spe_adma_slot_cleanup(struct ppc440spe_adma_chan *chan)
BUG_ON(!seen_current);
if (cookie > 0) {
- chan->completed_cookie = cookie;
+ chan->common.completed_cookie = cookie;
pr_debug("\tcompleted cookie %d\n", cookie);
}
@@ -2150,22 +2151,6 @@ static int ppc440spe_adma_alloc_chan_resources(struct dma_chan *chan)
}
/**
- * ppc440spe_desc_assign_cookie - assign a cookie
- */
-static dma_cookie_t ppc440spe_desc_assign_cookie(
- struct ppc440spe_adma_chan *chan,
- struct ppc440spe_adma_desc_slot *desc)
-{
- dma_cookie_t cookie = chan->common.cookie;
-
- cookie++;
- if (cookie < 0)
- cookie = 1;
- chan->common.cookie = desc->async_tx.cookie = cookie;
- return cookie;
-}
-
-/**
* ppc440spe_rxor_set_region_data -
*/
static void ppc440spe_rxor_set_region(struct ppc440spe_adma_desc_slot *desc,
@@ -2235,8 +2220,7 @@ static dma_cookie_t ppc440spe_adma_tx_submit(struct dma_async_tx_descriptor *tx)
slots_per_op = group_start->slots_per_op;
spin_lock_bh(&chan->lock);
-
- cookie = ppc440spe_desc_assign_cookie(chan, sw_desc);
+ cookie = dma_cookie_assign(tx);
if (unlikely(list_empty(&chan->chain))) {
/* first peer */
@@ -3944,28 +3928,16 @@ static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
dma_cookie_t cookie, struct dma_tx_state *txstate)
{
struct ppc440spe_adma_chan *ppc440spe_chan;
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
enum dma_status ret;
ppc440spe_chan = to_ppc440spe_adma_chan(chan);
- last_used = chan->cookie;
- last_complete = ppc440spe_chan->completed_cookie;
-
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret == DMA_SUCCESS)
return ret;
ppc440spe_adma_slot_cleanup(ppc440spe_chan);
- last_used = chan->cookie;
- last_complete = ppc440spe_chan->completed_cookie;
-
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return dma_cookie_status(chan, cookie, txstate);
}
/**
@@ -4050,16 +4022,12 @@ static void ppc440spe_chan_start_null_xor(struct ppc440spe_adma_chan *chan)
async_tx_ack(&sw_desc->async_tx);
ppc440spe_desc_init_null_xor(group_start);
- cookie = chan->common.cookie;
- cookie++;
- if (cookie <= 1)
- cookie = 2;
+ cookie = dma_cookie_assign(&sw_desc->async_tx);
/* initialize the completed cookie to be less than
* the most recently used cookie
*/
- chan->completed_cookie = cookie - 1;
- chan->common.cookie = sw_desc->async_tx.cookie = cookie;
+ chan->common.completed_cookie = cookie - 1;
/* channel should not be busy */
BUG_ON(ppc440spe_chan_is_busy(chan));
@@ -4529,6 +4497,7 @@ static int __devinit ppc440spe_adma_probe(struct platform_device *ofdev)
INIT_LIST_HEAD(&chan->all_slots);
chan->device = adev;
chan->common.device = &adev->common;
+ dma_cookie_init(&chan->common);
list_add_tail(&chan->common.device_node, &adev->common.channels);
tasklet_init(&chan->irq_tasklet, ppc440spe_adma_tasklet,
(unsigned long)chan);
diff --git a/drivers/dma/ppc4xx/adma.h b/drivers/dma/ppc4xx/adma.h
index 8ada5a812e3b..26b7a5ed9ac7 100644
--- a/drivers/dma/ppc4xx/adma.h
+++ b/drivers/dma/ppc4xx/adma.h
@@ -81,7 +81,6 @@ struct ppc440spe_adma_device {
* @common: common dmaengine channel object members
* @all_slots: complete domain of slots usable by the channel
* @pending: allows batching of hardware operations
- * @completed_cookie: identifier for the most recently completed operation
* @slots_allocated: records the actual size of the descriptor slot pool
* @hw_chain_inited: h/w descriptor chain initialization flag
* @irq_tasklet: bottom half where ppc440spe_adma_slot_cleanup runs
@@ -99,7 +98,6 @@ struct ppc440spe_adma_chan {
struct list_head all_slots;
struct ppc440spe_adma_desc_slot *last_used;
int pending;
- dma_cookie_t completed_cookie;
int slots_allocated;
int hw_chain_inited;
struct tasklet_struct irq_tasklet;
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 812fd76e9c18..5c4088603dd4 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -30,6 +30,8 @@
#include <linux/kdebug.h>
#include <linux/spinlock.h>
#include <linux/rculist.h>
+
+#include "dmaengine.h"
#include "shdma.h"
/* DMA descriptor control */
@@ -296,13 +298,7 @@ static dma_cookie_t sh_dmae_tx_submit(struct dma_async_tx_descriptor *tx)
else
power_up = false;
- cookie = sh_chan->common.cookie;
- cookie++;
- if (cookie < 0)
- cookie = 1;
-
- sh_chan->common.cookie = cookie;
- tx->cookie = cookie;
+ cookie = dma_cookie_assign(tx);
/* Mark all chunks of this descriptor as submitted, move to the queue */
list_for_each_entry_safe(chunk, c, desc->node.prev, node) {
@@ -764,12 +760,12 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
cookie = tx->cookie;
if (desc->mark == DESC_COMPLETED && desc->chunks == 1) {
- if (sh_chan->completed_cookie != desc->cookie - 1)
+ if (sh_chan->common.completed_cookie != desc->cookie - 1)
dev_dbg(sh_chan->dev,
"Completing cookie %d, expected %d\n",
desc->cookie,
- sh_chan->completed_cookie + 1);
- sh_chan->completed_cookie = desc->cookie;
+ sh_chan->common.completed_cookie + 1);
+ sh_chan->common.completed_cookie = desc->cookie;
}
/* Call callback on the last chunk */
@@ -823,7 +819,7 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
* Terminating and the loop completed normally: forgive
* uncompleted cookies
*/
- sh_chan->completed_cookie = sh_chan->common.cookie;
+ sh_chan->common.completed_cookie = sh_chan->common.cookie;
spin_unlock_irqrestore(&sh_chan->desc_lock, flags);
@@ -883,23 +879,14 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct sh_dmae_chan *sh_chan = to_sh_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
enum dma_status status;
unsigned long flags;
sh_dmae_chan_ld_cleanup(sh_chan, false);
- /* First read completed cookie to avoid a skew */
- last_complete = sh_chan->completed_cookie;
- rmb();
- last_used = chan->cookie;
- BUG_ON(last_complete < 0);
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
spin_lock_irqsave(&sh_chan->desc_lock, flags);
- status = dma_async_is_complete(cookie, last_complete, last_used);
+ status = dma_cookie_status(chan, cookie, txstate);
/*
* If we don't find cookie on the queue, it has been aborted and we have
@@ -1102,6 +1089,7 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
/* reference struct dma_device */
new_sh_chan->common.device = &shdev->common;
+ dma_cookie_init(&new_sh_chan->common);
new_sh_chan->dev = shdev->common.dev;
new_sh_chan->id = id;
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 2b55a276dc5b..0b1d2c105f02 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -30,7 +30,6 @@ enum dmae_pm_state {
};
struct sh_dmae_chan {
- dma_cookie_t completed_cookie; /* The maximum cookie completed */
spinlock_t desc_lock; /* Descriptor operation lock */
struct list_head ld_queue; /* Link descriptors queue */
struct list_head ld_free; /* Link descriptors free */
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index 2333810d1688..45ba352fb871 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -18,6 +18,8 @@
#include <linux/of_platform.h>
#include <linux/sirfsoc_dma.h>
+#include "dmaengine.h"
+
#define SIRFSOC_DMA_DESCRIPTORS 16
#define SIRFSOC_DMA_CHANNELS 16
@@ -59,7 +61,6 @@ struct sirfsoc_dma_chan {
struct list_head queued;
struct list_head active;
struct list_head completed;
- dma_cookie_t completed_cookie;
unsigned long happened_cyclic;
unsigned long completed_cyclic;
@@ -208,7 +209,7 @@ static void sirfsoc_dma_process_completed(struct sirfsoc_dma *sdma)
/* Free descriptors */
spin_lock_irqsave(&schan->lock, flags);
list_splice_tail_init(&list, &schan->free);
- schan->completed_cookie = last_cookie;
+ schan->chan.completed_cookie = last_cookie;
spin_unlock_irqrestore(&schan->lock, flags);
} else {
/* for cyclic channel, desc is always in active list */
@@ -258,13 +259,7 @@ static dma_cookie_t sirfsoc_dma_tx_submit(struct dma_async_tx_descriptor *txd)
/* Move descriptor to queue */
list_move_tail(&sdesc->node, &schan->queued);
- /* Update cookie */
- cookie = schan->chan.cookie + 1;
- if (cookie <= 0)
- cookie = 1;
-
- schan->chan.cookie = cookie;
- sdesc->desc.cookie = cookie;
+ cookie = dma_cookie_assign(txd);
spin_unlock_irqrestore(&schan->lock, flags);
@@ -414,16 +409,13 @@ sirfsoc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
{
struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
unsigned long flags;
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
+ enum dma_status ret;
spin_lock_irqsave(&schan->lock, flags);
- last_used = schan->chan.cookie;
- last_complete = schan->completed_cookie;
+ ret = dma_cookie_status(chan, cookie, txstate);
spin_unlock_irqrestore(&schan->lock, flags);
- dma_set_tx_state(txstate, last_complete, last_used, 0);
- return dma_async_is_complete(cookie, last_complete, last_used);
+ return ret;
}
static struct dma_async_tx_descriptor *sirfsoc_dma_prep_interleaved(
@@ -635,8 +627,7 @@ static int __devinit sirfsoc_dma_probe(struct platform_device *op)
schan = &sdma->channels[i];
schan->chan.device = dma;
- schan->chan.cookie = 1;
- schan->completed_cookie = schan->chan.cookie;
+ dma_cookie_init(&schan->chan);
INIT_LIST_HEAD(&schan->free);
INIT_LIST_HEAD(&schan->prepared);
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index cc5ecbc067a3..1ea6d02d08ab 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -21,6 +21,7 @@
#include <plat/ste_dma40.h>
+#include "dmaengine.h"
#include "ste_dma40_ll.h"
#define D40_NAME "dma40"
@@ -220,8 +221,6 @@ struct d40_base;
*
* @lock: A spinlock to protect this struct.
* @log_num: The logical number, if any of this channel.
- * @completed: Starts with 1, after first interrupt it is set to dma engine's
- * current cookie.
* @pending_tx: The number of pending transfers. Used between interrupt handler
* and tasklet.
* @busy: Set to true when transfer is ongoing on this channel.
@@ -250,8 +249,6 @@ struct d40_base;
struct d40_chan {
spinlock_t lock;
int log_num;
- /* ID of the most recent completed transfer */
- int completed;
int pending_tx;
bool busy;
struct d40_phy_res *phy_chan;
@@ -1223,21 +1220,14 @@ static dma_cookie_t d40_tx_submit(struct dma_async_tx_descriptor *tx)
chan);
struct d40_desc *d40d = container_of(tx, struct d40_desc, txd);
unsigned long flags;
+ dma_cookie_t cookie;
spin_lock_irqsave(&d40c->lock, flags);
-
- d40c->chan.cookie++;
-
- if (d40c->chan.cookie < 0)
- d40c->chan.cookie = 1;
-
- d40d->txd.cookie = d40c->chan.cookie;
-
+ cookie = dma_cookie_assign(tx);
d40_desc_queue(d40c, d40d);
-
spin_unlock_irqrestore(&d40c->lock, flags);
- return tx->cookie;
+ return cookie;
}
static int d40_start(struct d40_chan *d40c)
@@ -1357,7 +1347,7 @@ static void dma_tasklet(unsigned long data)
goto err;
if (!d40d->cyclic)
- d40c->completed = d40d->txd.cookie;
+ dma_cookie_complete(&d40d->txd);
/*
* If terminating a channel pending_tx is set to zero.
@@ -2182,7 +2172,7 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
bool is_free_phy;
spin_lock_irqsave(&d40c->lock, flags);
- d40c->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
/* If no dma configuration is set use default configuration (memcpy) */
if (!d40c->configured) {
@@ -2342,25 +2332,19 @@ static enum dma_status d40_tx_status(struct dma_chan *chan,
struct dma_tx_state *txstate)
{
struct d40_chan *d40c = container_of(chan, struct d40_chan, chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
+ enum dma_status ret;
if (d40c->phy_chan == NULL) {
chan_err(d40c, "Cannot read status of unallocated channel\n");
return -EINVAL;
}
- last_complete = d40c->completed;
- last_used = chan->cookie;
+ ret = dma_cookie_status(chan, cookie, txstate);
+ if (ret != DMA_SUCCESS)
+ dma_set_residue(txstate, stedma40_residue(chan));
if (d40_is_paused(d40c))
ret = DMA_PAUSED;
- else
- ret = dma_async_is_complete(cookie, last_complete, last_used);
-
- dma_set_tx_state(txstate, last_complete, last_used,
- stedma40_residue(chan));
return ret;
}
diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c
index a6f9c1684a0f..d408c2206023 100644
--- a/drivers/dma/timb_dma.c
+++ b/drivers/dma/timb_dma.c
@@ -31,6 +31,8 @@
#include <linux/timb_dma.h>
+#include "dmaengine.h"
+
#define DRIVER_NAME "timb-dma"
/* Global DMA registers */
@@ -84,7 +86,6 @@ struct timb_dma_chan {
especially the lists and descriptors,
from races between the tasklet and calls
from above */
- dma_cookie_t last_completed_cookie;
bool ongoing;
struct list_head active_list;
struct list_head queue;
@@ -284,7 +285,7 @@ static void __td_finish(struct timb_dma_chan *td_chan)
else
iowrite32(0, td_chan->membase + TIMBDMA_OFFS_TX_DLAR);
*/
- td_chan->last_completed_cookie = txd->cookie;
+ dma_cookie_complete(txd);
td_chan->ongoing = false;
callback = txd->callback;
@@ -349,12 +350,7 @@ static dma_cookie_t td_tx_submit(struct dma_async_tx_descriptor *txd)
dma_cookie_t cookie;
spin_lock_bh(&td_chan->lock);
-
- cookie = txd->chan->cookie;
- if (++cookie < 0)
- cookie = 1;
- txd->chan->cookie = cookie;
- txd->cookie = cookie;
+ cookie = dma_cookie_assign(txd);
if (list_empty(&td_chan->active_list)) {
dev_dbg(chan2dev(txd->chan), "%s: started %u\n", __func__,
@@ -481,8 +477,7 @@ static int td_alloc_chan_resources(struct dma_chan *chan)
}
spin_lock_bh(&td_chan->lock);
- td_chan->last_completed_cookie = 1;
- chan->cookie = 1;
+ dma_cookie_init(chan);
spin_unlock_bh(&td_chan->lock);
return 0;
@@ -515,24 +510,13 @@ static void td_free_chan_resources(struct dma_chan *chan)
static enum dma_status td_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
- struct timb_dma_chan *td_chan =
- container_of(chan, struct timb_dma_chan, chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
+ enum dma_status ret;
dev_dbg(chan2dev(chan), "%s: Entry\n", __func__);
- last_complete = td_chan->last_completed_cookie;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
-
- dma_set_tx_state(txstate, last_complete, last_used, 0);
+ ret = dma_cookie_status(chan, cookie, txstate);
- dev_dbg(chan2dev(chan),
- "%s: exit, ret: %d, last_complete: %d, last_used: %d\n",
- __func__, ret, last_complete, last_used);
+ dev_dbg(chan2dev(chan), "%s: exit, ret: %d\n", __func__, ret);
return ret;
}
@@ -766,7 +750,7 @@ static int __devinit td_probe(struct platform_device *pdev)
}
td_chan->chan.device = &td->dma;
- td_chan->chan.cookie = 1;
+ dma_cookie_init(&td_chan->chan);
spin_lock_init(&td_chan->lock);
INIT_LIST_HEAD(&td_chan->active_list);
INIT_LIST_HEAD(&td_chan->queue);
diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index 6122c364cf11..40440f946385 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -15,6 +15,8 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/scatterlist.h>
+
+#include "dmaengine.h"
#include "txx9dmac.h"
static struct txx9dmac_chan *to_txx9dmac_chan(struct dma_chan *chan)
@@ -279,21 +281,6 @@ static void txx9dmac_desc_put(struct txx9dmac_chan *dc,
}
}
-/* Called with dc->lock held and bh disabled */
-static dma_cookie_t
-txx9dmac_assign_cookie(struct txx9dmac_chan *dc, struct txx9dmac_desc *desc)
-{
- dma_cookie_t cookie = dc->chan.cookie;
-
- if (++cookie < 0)
- cookie = 1;
-
- dc->chan.cookie = cookie;
- desc->txd.cookie = cookie;
-
- return cookie;
-}
-
/*----------------------------------------------------------------------*/
static void txx9dmac_dump_regs(struct txx9dmac_chan *dc)
@@ -424,7 +411,7 @@ txx9dmac_descriptor_complete(struct txx9dmac_chan *dc,
dev_vdbg(chan2dev(&dc->chan), "descriptor %u %p complete\n",
txd->cookie, desc);
- dc->completed = txd->cookie;
+ dma_cookie_complete(txd);
callback = txd->callback;
param = txd->callback_param;
@@ -738,7 +725,7 @@ static dma_cookie_t txx9dmac_tx_submit(struct dma_async_tx_descriptor *tx)
dma_cookie_t cookie;
spin_lock_bh(&dc->lock);
- cookie = txx9dmac_assign_cookie(dc, desc);
+ cookie = dma_cookie_assign(tx);
dev_vdbg(chan2dev(tx->chan), "tx_submit: queued %u %p\n",
desc->txd.cookie, desc);
@@ -972,27 +959,17 @@ txx9dmac_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
struct txx9dmac_chan *dc = to_txx9dmac_chan(chan);
- dma_cookie_t last_used;
- dma_cookie_t last_complete;
- int ret;
+ enum dma_status ret;
- last_complete = dc->completed;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
if (ret != DMA_SUCCESS) {
spin_lock_bh(&dc->lock);
txx9dmac_scan_descriptors(dc);
spin_unlock_bh(&dc->lock);
- last_complete = dc->completed;
- last_used = chan->cookie;
-
- ret = dma_async_is_complete(cookie, last_complete, last_used);
+ ret = dma_cookie_status(chan, cookie, txstate);
}
- dma_set_tx_state(txstate, last_complete, last_used, 0);
-
return ret;
}
@@ -1057,7 +1034,7 @@ static int txx9dmac_alloc_chan_resources(struct dma_chan *chan)
return -EIO;
}
- dc->completed = chan->cookie = 1;
+ dma_cookie_init(chan);
dc->ccr = TXX9_DMA_CCR_IMMCHN | TXX9_DMA_CCR_INTENE | CCR_LE;
txx9dmac_chan_set_SMPCHN(dc);
@@ -1186,7 +1163,7 @@ static int __init txx9dmac_chan_probe(struct platform_device *pdev)
dc->ddev->chan[ch] = dc;
dc->chan.device = &dc->dma;
list_add_tail(&dc->chan.device_node, &dc->chan.device->channels);
- dc->chan.cookie = dc->completed = 1;
+ dma_cookie_init(&dc->chan);
if (is_dmac64(dc))
dc->ch_regs = &__txx9dmac_regs(dc->ddev)->CHAN[ch];
diff --git a/drivers/dma/txx9dmac.h b/drivers/dma/txx9dmac.h
index 365d42366b9f..f5a760598882 100644
--- a/drivers/dma/txx9dmac.h
+++ b/drivers/dma/txx9dmac.h
@@ -172,7 +172,6 @@ struct txx9dmac_chan {
spinlock_t lock;
/* these other elements are all protected by lock */
- dma_cookie_t completed;
struct list_head active_list;
struct list_head queue;
struct list_head free_list;