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alistair23-linux
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Merge branch 'coh' into dmaengine

hifive-unleashed-5.1
Dan Williams 2010-03-03 21:22:21 -07:00
parent aa4d72ae94 56a5d3cf21
commit dd58ffcf5a
7 changed files with 117 additions and 124 deletions
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2
arch/arm/mach-u300/include/mach/coh901318.h
View File

@ -53,7 +53,7 @@ struct coh901318_params {
* struct coh_dma_channel - dma channel base
* @name: ascii name of dma channel
* @number: channel id number
* @desc_nbr_max: number of preallocated descriptortors
* @desc_nbr_max: number of preallocated descriptors
* @priority_high: prio of channel, 0 low otherwise high.
* @param: configuration parameters
* @dev_addr: physical address of periphal connected to channel

186
drivers/dma/coh901318.c
View File

@ -39,7 +39,6 @@ struct coh901318_desc {
unsigned int sg_len;
struct coh901318_lli *data;
enum dma_data_direction dir;
int pending_irqs;
unsigned long flags;
};
@ -72,7 +71,6 @@ struct coh901318_chan {
unsigned long nbr_active_done;
unsigned long busy;
int pending_irqs;
struct coh901318_base *base;
};
@ -80,18 +78,16 @@ struct coh901318_chan {
static void coh901318_list_print(struct coh901318_chan *cohc,
struct coh901318_lli *lli)
{
struct coh901318_lli *l;
dma_addr_t addr = virt_to_phys(lli);
struct coh901318_lli *l = lli;
int i = 0;
while (addr) {
l = phys_to_virt(addr);
while (l) {
dev_vdbg(COHC_2_DEV(cohc), "i %d, lli %p, ctrl 0x%x, src 0x%x"
", dst 0x%x, link 0x%x link_virt 0x%p\n",
", dst 0x%x, link 0x%x virt_link_addr 0x%p\n",
i, l, l->control, l->src_addr, l->dst_addr,
l->link_addr, phys_to_virt(l->link_addr));
l->link_addr, l->virt_link_addr);
i++;
addr = l->link_addr;
l = l->virt_link_addr;
}
}
@ -125,7 +121,7 @@ static int coh901318_debugfs_read(struct file *file, char __user *buf,
goto err_kmalloc;
tmp = dev_buf;
tmp += sprintf(tmp, "DMA -- enable dma channels\n");
tmp += sprintf(tmp, "DMA -- enabled dma channels\n");
for (i = 0; i < debugfs_dma_base->platform->max_channels; i++)
if (started_channels & (1 << i))
@ -337,16 +333,22 @@ coh901318_desc_get(struct coh901318_chan *cohc)
* TODO: alloc a pile of descs instead of just one,
* avoid many small allocations.
*/
desc = kmalloc(sizeof(struct coh901318_desc), GFP_NOWAIT);
desc = kzalloc(sizeof(struct coh901318_desc), GFP_NOWAIT);
if (desc == NULL)
goto out;
INIT_LIST_HEAD(&desc->node);
dma_async_tx_descriptor_init(&desc->desc, &cohc->chan);
} else {
/* Reuse an old desc. */
desc = list_first_entry(&cohc->free,
struct coh901318_desc,
node);
list_del(&desc->node);
/* Initialize it a bit so it's not insane */
desc->sg = NULL;
desc->sg_len = 0;
desc->desc.callback = NULL;
desc->desc.callback_param = NULL;
}
out:
@ -364,10 +366,6 @@ static void
coh901318_desc_submit(struct coh901318_chan *cohc, struct coh901318_desc *desc)
{
list_add_tail(&desc->node, &cohc->active);
BUG_ON(cohc->pending_irqs != 0);
cohc->pending_irqs = desc->pending_irqs;
}
static struct coh901318_desc *
@ -592,6 +590,10 @@ static struct coh901318_desc *coh901318_queue_start(struct coh901318_chan *cohc)
return cohd_que;
}
/*
* This tasklet is called from the interrupt handler to
* handle each descriptor (DMA job) that is sent to a channel.
*/
static void dma_tasklet(unsigned long data)
{
struct coh901318_chan *cohc = (struct coh901318_chan *) data;
@ -600,57 +602,58 @@ static void dma_tasklet(unsigned long data)
dma_async_tx_callback callback;
void *callback_param;
dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d"
" nbr_active_done %ld\n", __func__,
cohc->id, cohc->nbr_active_done);
spin_lock_irqsave(&cohc->lock, flags);
/* get first active entry from list */
/* get first active descriptor entry from list */
cohd_fin = coh901318_first_active_get(cohc);
BUG_ON(cohd_fin->pending_irqs == 0);
if (cohd_fin == NULL)
goto err;
cohd_fin->pending_irqs--;
cohc->completed = cohd_fin->desc.cookie;
BUG_ON(cohc->nbr_active_done && cohd_fin == NULL);
if (cohc->nbr_active_done == 0)
return;
if (!cohd_fin->pending_irqs) {
/* release the lli allocation*/
coh901318_lli_free(&cohc->base->pool, &cohd_fin->data);
}
dev_vdbg(COHC_2_DEV(cohc), "[%s] chan_id %d pending_irqs %d"
" nbr_active_done %ld\n", __func__,
cohc->id, cohc->pending_irqs, cohc->nbr_active_done);
/* callback to client */
/* locate callback to client */
callback = cohd_fin->desc.callback;
callback_param = cohd_fin->desc.callback_param;
if (!cohd_fin->pending_irqs) {
coh901318_desc_remove(cohd_fin);
/* sign this job as completed on the channel */
cohc->completed = cohd_fin->desc.cookie;
/* return desc to free-list */
coh901318_desc_free(cohc, cohd_fin);
}
/* release the lli allocation and remove the descriptor */
coh901318_lli_free(&cohc->base->pool, &cohd_fin->data);
if (cohc->nbr_active_done)
cohc->nbr_active_done--;
/* return desc to free-list */
coh901318_desc_remove(cohd_fin);
coh901318_desc_free(cohc, cohd_fin);
spin_unlock_irqrestore(&cohc->lock, flags);
/* Call the callback when we're done */
if (callback)
callback(callback_param);
spin_lock_irqsave(&cohc->lock, flags);
/*
* If another interrupt fired while the tasklet was scheduling,
* we don't get called twice, so we have this number of active
* counter that keep track of the number of IRQs expected to
* be handled for this channel. If there happen to be more than
* one IRQ to be ack:ed, we simply schedule this tasklet again.
*/
cohc->nbr_active_done--;
if (cohc->nbr_active_done) {
dev_dbg(COHC_2_DEV(cohc), "scheduling tasklet again, new IRQs "
"came in while we were scheduling this tasklet\n");
if (cohc_chan_conf(cohc)->priority_high)
tasklet_hi_schedule(&cohc->tasklet);
else
tasklet_schedule(&cohc->tasklet);
}
spin_unlock_irqrestore(&cohc->lock, flags);
if (callback)
callback(callback_param);
spin_unlock_irqrestore(&cohc->lock, flags);
return;
@ -669,16 +672,17 @@ static void dma_tc_handle(struct coh901318_chan *cohc)
if (!cohc->allocated)
return;
BUG_ON(cohc->pending_irqs == 0);
spin_lock(&cohc->lock);
cohc->pending_irqs--;
cohc->nbr_active_done++;
if (cohc->pending_irqs == 0 && coh901318_queue_start(cohc) == NULL)
if (coh901318_queue_start(cohc) == NULL)
cohc->busy = 0;
BUG_ON(list_empty(&cohc->active));
spin_unlock(&cohc->lock);
if (cohc_chan_conf(cohc)->priority_high)
tasklet_hi_schedule(&cohc->tasklet);
else
@ -872,6 +876,7 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
struct coh901318_chan *cohc = to_coh901318_chan(chan);
int lli_len;
u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
int ret;
spin_lock_irqsave(&cohc->lock, flg);
@ -892,22 +897,19 @@ coh901318_prep_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
if (data == NULL)
goto err;
cohd = coh901318_desc_get(cohc);
cohd->sg = NULL;
cohd->sg_len = 0;
cohd->data = data;
cohd->pending_irqs =
coh901318_lli_fill_memcpy(
&cohc->base->pool, data, src, size, dest,
cohc_chan_param(cohc)->ctrl_lli_chained,
ctrl_last);
cohd->flags = flags;
ret = coh901318_lli_fill_memcpy(
&cohc->base->pool, data, src, size, dest,
cohc_chan_param(cohc)->ctrl_lli_chained,
ctrl_last);
if (ret)
goto err;
COH_DBG(coh901318_list_print(cohc, data));
dma_async_tx_descriptor_init(&cohd->desc, chan);
/* Pick a descriptor to handle this transfer */
cohd = coh901318_desc_get(cohc);
cohd->data = data;
cohd->flags = flags;
cohd->desc.tx_submit = coh901318_tx_submit;
spin_unlock_irqrestore(&cohc->lock, flg);
@ -926,6 +928,7 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
struct coh901318_chan *cohc = to_coh901318_chan(chan);
struct coh901318_lli *data;
struct coh901318_desc *cohd;
const struct coh901318_params *params;
struct scatterlist *sg;
int len = 0;
int size;
@ -933,7 +936,9 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
u32 ctrl_chained = cohc_chan_param(cohc)->ctrl_lli_chained;
u32 ctrl = cohc_chan_param(cohc)->ctrl_lli;
u32 ctrl_last = cohc_chan_param(cohc)->ctrl_lli_last;
u32 config;
unsigned long flg;
int ret;
if (!sgl)
goto out;
@ -949,15 +954,14 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
/* Trigger interrupt after last lli */
ctrl_last |= COH901318_CX_CTRL_TC_IRQ_ENABLE;
cohd = coh901318_desc_get(cohc);
cohd->sg = NULL;
cohd->sg_len = 0;
cohd->dir = direction;
params = cohc_chan_param(cohc);
config = params->config;
if (direction == DMA_TO_DEVICE) {
u32 tx_flags = COH901318_CX_CTRL_PRDD_SOURCE |
COH901318_CX_CTRL_SRC_ADDR_INC_ENABLE;
config |= COH901318_CX_CFG_RM_MEMORY_TO_PRIMARY;
ctrl_chained |= tx_flags;
ctrl_last |= tx_flags;
ctrl |= tx_flags;
@ -965,16 +969,14 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
u32 rx_flags = COH901318_CX_CTRL_PRDD_DEST |
COH901318_CX_CTRL_DST_ADDR_INC_ENABLE;
config |= COH901318_CX_CFG_RM_PRIMARY_TO_MEMORY;
ctrl_chained |= rx_flags;
ctrl_last |= rx_flags;
ctrl |= rx_flags;
} else
goto err_direction;
dma_async_tx_descriptor_init(&cohd->desc, chan);
cohd->desc.tx_submit = coh901318_tx_submit;
coh901318_set_conf(cohc, config);
/* The dma only supports transmitting packages up to
* MAX_DMA_PACKET_SIZE. Calculate to total number of
@ -996,32 +998,37 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
len += factor;
}
pr_debug("Allocate %d lli:s for this transfer\n", len);
data = coh901318_lli_alloc(&cohc->base->pool, len);
if (data == NULL)
goto err_dma_alloc;
/* initiate allocated data list */
cohd->pending_irqs =
coh901318_lli_fill_sg(&cohc->base->pool, data, sgl, sg_len,
cohc_dev_addr(cohc),
ctrl_chained,
ctrl,
ctrl_last,
direction, COH901318_CX_CTRL_TC_IRQ_ENABLE);
cohd->data = data;
cohd->flags = flags;
ret = coh901318_lli_fill_sg(&cohc->base->pool, data, sgl, sg_len,
cohc_dev_addr(cohc),
ctrl_chained,
ctrl,
ctrl_last,
direction, COH901318_CX_CTRL_TC_IRQ_ENABLE);
if (ret)
goto err_lli_fill;
COH_DBG(coh901318_list_print(cohc, data));
/* Pick a descriptor to handle this transfer */
cohd = coh901318_desc_get(cohc);
cohd->dir = direction;
cohd->flags = flags;
cohd->desc.tx_submit = coh901318_tx_submit;
cohd->data = data;
spin_unlock_irqrestore(&cohc->lock, flg);
return &cohd->desc;
err_lli_fill:
err_dma_alloc:
err_direction:
coh901318_desc_remove(cohd);
coh901318_desc_free(cohc, cohd);
spin_unlock_irqrestore(&cohc->lock, flg);
out:
return NULL;
@ -1094,9 +1101,8 @@ coh901318_terminate_all(struct dma_chan *chan)
/* release the lli allocation*/
coh901318_lli_free(&cohc->base->pool, &cohd->data);
coh901318_desc_remove(cohd);
/* return desc to free-list */
coh901318_desc_remove(cohd);
coh901318_desc_free(cohc, cohd);
}
@ -1104,16 +1110,14 @@ coh901318_terminate_all(struct dma_chan *chan)
/* release the lli allocation*/
coh901318_lli_free(&cohc->base->pool, &cohd->data);
coh901318_desc_remove(cohd);
/* return desc to free-list */
coh901318_desc_remove(cohd);
coh901318_desc_free(cohc, cohd);
}
cohc->nbr_active_done = 0;
cohc->busy = 0;
cohc->pending_irqs = 0;
spin_unlock_irqrestore(&cohc->lock, flags);
}
@ -1140,7 +1144,6 @@ void coh901318_base_init(struct dma_device *dma, const int *pick_chans,
spin_lock_init(&cohc->lock);
cohc->pending_irqs = 0;
cohc->nbr_active_done = 0;
cohc->busy = 0;
INIT_LIST_HEAD(&cohc->free);
@ -1256,12 +1259,17 @@ static int __init coh901318_probe(struct platform_device *pdev)
base->dma_memcpy.device_issue_pending = coh901318_issue_pending;
base->dma_memcpy.device_terminate_all = coh901318_terminate_all;
base->dma_memcpy.dev = &pdev->dev;
/*
* This controller can only access address at even 32bit boundaries,
* i.e. 2^2
*/
base->dma_memcpy.copy_align = 2;
err = dma_async_device_register(&base->dma_memcpy);
if (err)
goto err_register_memcpy;
dev_dbg(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
(u32) base->virtbase);
return err;

23
drivers/dma/coh901318_lli.c
View File

@ -74,6 +74,8 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
lli = head;
lli->phy_this = phy;
lli->link_addr = 0x00000000;
lli->virt_link_addr = 0x00000000U;
for (i = 1; i < len; i++) {
lli_prev = lli;
@ -85,13 +87,13 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
DEBUGFS_POOL_COUNTER_ADD(pool, 1);
lli->phy_this = phy;
lli->link_addr = 0x00000000;
lli->virt_link_addr = 0x00000000U;
lli_prev->link_addr = phy;
lli_prev->virt_link_addr = lli;
}
lli->link_addr = 0x00000000U;
spin_unlock(&pool->lock);
return head;
@ -166,8 +168,7 @@ coh901318_lli_fill_memcpy(struct coh901318_pool *pool,
lli->src_addr = src;
lli->dst_addr = dst;
/* One irq per single transfer */
return 1;
return 0;
}
int
@ -223,8 +224,7 @@ coh901318_lli_fill_single(struct coh901318_pool *pool,
lli->src_addr = src;
lli->dst_addr = dst;
/* One irq per single transfer */
return 1;
return 0;
}
int
@ -240,7 +240,6 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
u32 ctrl_sg;
dma_addr_t src = 0;
dma_addr_t dst = 0;
int nbr_of_irq = 0;
u32 bytes_to_transfer;
u32 elem_size;
@ -269,15 +268,12 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
ctrl_sg = ctrl ? ctrl : ctrl_last;
if ((ctrl_sg & ctrl_irq_mask))
nbr_of_irq++;
if (dir == DMA_TO_DEVICE)
/* increment source address */
src = sg_dma_address(sg);
src = sg_phys(sg);
else
/* increment destination address */
dst = sg_dma_address(sg);
dst = sg_phys(sg);
bytes_to_transfer = sg_dma_len(sg);
@ -310,8 +306,7 @@ coh901318_lli_fill_sg(struct coh901318_pool *pool,
}
spin_unlock(&pool->lock);
/* There can be many IRQs per sg transfer */
return nbr_of_irq;
return 0;
err:
spin_unlock(&pool->lock);
return -EINVAL;

1
drivers/dma/dmaengine.c
View File

@ -826,6 +826,7 @@ void dma_async_device_unregister(struct dma_device *device)
chan->dev->chan = NULL;
mutex_unlock(&dma_list_mutex);
device_unregister(&chan->dev->device);
free_percpu(chan->local);
}
}
EXPORT_SYMBOL(dma_async_device_unregister);

2
drivers/dma/dmatest.c
View File

@ -467,7 +467,7 @@ err_srcs:
if (iterations > 0)
while (!kthread_should_stop()) {
DECLARE_WAIT_QUEUE_HEAD(wait_dmatest_exit);
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit);
interruptible_sleep_on(&wait_dmatest_exit);
}

2
drivers/dma/ioat/dma_v2.c
View File

@ -241,7 +241,7 @@ int ioat2_quiesce(struct ioat_chan_common *chan, unsigned long tmo)
if (is_ioat_active(status) || is_ioat_idle(status))
ioat_suspend(chan);
while (is_ioat_active(status) || is_ioat_idle(status)) {
if (end && time_after(jiffies, end)) {
if (tmo && time_after(jiffies, end)) {
err = -ETIMEDOUT;
break;
}

25
drivers/dma/ipu/ipu_idmac.c
View File

@ -748,12 +748,10 @@ static void ipu_select_buffer(enum ipu_channel channel, int buffer_n)
* @buffer_n: buffer number to update.
* 0 or 1 are the only valid values.
* @phyaddr: buffer physical address.
* @return: Returns 0 on success or negative error code on failure. This
* function will fail if the buffer is set to ready.
*/
/* Called under spin_lock(_irqsave)(&ichan->lock) */
static int ipu_update_channel_buffer(struct idmac_channel *ichan,
int buffer_n, dma_addr_t phyaddr)
static void ipu_update_channel_buffer(struct idmac_channel *ichan,
int buffer_n, dma_addr_t phyaddr)
{
enum ipu_channel channel = ichan->dma_chan.chan_id;
uint32_t reg;
@ -793,8 +791,6 @@ static int ipu_update_channel_buffer(struct idmac_channel *ichan,
}
spin_unlock_irqrestore(&ipu_data.lock, flags);
return 0;
}
/* Called under spin_lock_irqsave(&ichan->lock) */
@ -803,7 +799,6 @@ static int ipu_submit_buffer(struct idmac_channel *ichan,
{
unsigned int chan_id = ichan->dma_chan.chan_id;
struct device *dev = &ichan->dma_chan.dev->device;
int ret;
if (async_tx_test_ack(&desc->txd))
return -EINTR;
@ -814,14 +809,7 @@ static int ipu_submit_buffer(struct idmac_channel *ichan,
* could make it conditional on status >= IPU_CHANNEL_ENABLED, but
* doing it again shouldn't hurt either.
*/
ret = ipu_update_channel_buffer(ichan, buf_idx,
sg_dma_address(sg));
if (ret < 0) {
dev_err(dev, "Updating sg %p on channel 0x%x buffer %d failed!\n",
sg, chan_id, buf_idx);
return ret;
}
ipu_update_channel_buffer(ichan, buf_idx, sg_dma_address(sg));
ipu_select_buffer(chan_id, buf_idx);
dev_dbg(dev, "Updated sg %p on channel 0x%x buffer %d\n",
@ -1366,10 +1354,11 @@ static irqreturn_t idmac_interrupt(int irq, void *dev_id)
if (likely(sgnew) &&
ipu_submit_buffer(ichan, descnew, sgnew, ichan->active_buffer) < 0) {
callback = desc->txd.callback;
callback_param = desc->txd.callback_param;
callback = descnew->txd.callback;
callback_param = descnew->txd.callback_param;
spin_unlock(&ichan->lock);
callback(callback_param);
if (callback)
callback(callback_param);
spin_lock(&ichan->lock);
}