/*
- * driver/dma/ste_dma40.c
- *
- * Copyright (C) ST-Ericsson 2007-2010
+ * Copyright (C) ST-Ericsson SA 2007-2010
+ * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
- * Author: Per Friden <per.friden@stericsson.com>
- * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
- *
*/
#include <linux/kernel.h>
* @txd: DMA engine struct. Used for among other things for communication
* during a transfer.
* @node: List entry.
- * @dir: The transfer direction of this job.
* @is_in_client_list: true if the client owns this descriptor.
* @is_hw_linked: true if this job will automatically be continued for
* the previous one.
struct dma_async_tx_descriptor txd;
struct list_head node;
- enum dma_data_direction dir;
bool is_in_client_list;
bool is_hw_linked;
};
* this physical channel. Can also be free or physically allocated.
* @allocated_dst: Same as for src but is dst.
* allocated_dst and allocated_src uses the D40_ALLOC* defines as well as
- * event line number. Both allocated_src and allocated_dst can not be
- * allocated to a physical channel, since the interrupt handler has then
- * no way of figure out which one the interrupt belongs to.
+ * event line number.
*/
struct d40_phy_res {
spinlock_t lock;
* @dma_both: dma_device channels that can do both memcpy and slave transfers.
* @dma_slave: dma_device channels that can do only do slave transfers.
* @dma_memcpy: dma_device channels that can do only do memcpy transfers.
- * @phy_chans: Room for all possible physical channels in system.
* @log_chans: Room for all possible logical channels in system.
* @lookup_log_chans: Used to map interrupt number to logical channel. Points
* to log_chans entries.
static int d40_channel_execute_command(struct d40_chan *d40c,
enum d40_command command)
{
- int status, i;
+ u32 status;
+ int i;
void __iomem *active_reg;
int ret = 0;
unsigned long flags;
/* Release active descriptors */
while ((d40d = d40_first_active_get(d40c))) {
d40_desc_remove(d40d);
-
- /* Return desc to free-list */
d40_desc_free(d40c, d40d);
}
/* Release queued descriptors waiting for transfer */
while ((d40d = d40_first_queued(d40c))) {
d40_desc_remove(d40d);
-
- /* Return desc to free-list */
d40_desc_free(d40c, d40d);
}
{
struct d40_desc *d40d;
- if (!d40c->phy_chan)
- return;
-
/* Get first active entry from list */
d40d = d40_first_active_get(d40c);
static void dma_tasklet(unsigned long data)
{
struct d40_chan *d40c = (struct d40_chan *) data;
- struct d40_desc *d40d_fin;
+ struct d40_desc *d40d;
unsigned long flags;
dma_async_tx_callback callback;
void *callback_param;
spin_lock_irqsave(&d40c->lock, flags);
/* Get first active entry from list */
- d40d_fin = d40_first_active_get(d40c);
+ d40d = d40_first_active_get(d40c);
- if (d40d_fin == NULL)
+ if (d40d == NULL)
goto err;
- d40c->completed = d40d_fin->txd.cookie;
+ d40c->completed = d40d->txd.cookie;
/*
* If terminating a channel pending_tx is set to zero.
}
/* Callback to client */
- callback = d40d_fin->txd.callback;
- callback_param = d40d_fin->txd.callback_param;
-
- if (async_tx_test_ack(&d40d_fin->txd)) {
- d40_pool_lli_free(d40d_fin);
- d40_desc_remove(d40d_fin);
- /* Return desc to free-list */
- d40_desc_free(d40c, d40d_fin);
+ callback = d40d->txd.callback;
+ callback_param = d40d->txd.callback_param;
+
+ if (async_tx_test_ack(&d40d->txd)) {
+ d40_pool_lli_free(d40d);
+ d40_desc_remove(d40d);
+ d40_desc_free(d40c, d40d);
} else {
- if (!d40d_fin->is_in_client_list) {
- d40_desc_remove(d40d_fin);
- list_add_tail(&d40d_fin->node, &d40c->client);
- d40d_fin->is_in_client_list = true;
+ if (!d40d->is_in_client_list) {
+ d40_desc_remove(d40d);
+ list_add_tail(&d40d->node, &d40c->client);
+ d40d->is_in_client_list = true;
}
}
spin_unlock_irqrestore(&d40c->lock, flags);
- if (callback && (d40d_fin->txd.flags & DMA_PREP_INTERRUPT))
+ if (callback && (d40d->txd.flags & DMA_PREP_INTERRUPT))
callback(callback_param);
return;
return IRQ_HANDLED;
}
-
static int d40_validate_conf(struct d40_chan *d40c,
struct stedma40_chan_cfg *conf)
{
list_for_each_entry_safe(d, _d, &d40c->client, node) {
d40_pool_lli_free(d);
d40_desc_remove(d);
- /* Return desc to free-list */
d40_desc_free(d40c, d);
}
if (i < MAX_LCLA_ALLOC_ATTEMPTS) {
base->lcla_pool.base = (void *)page_list[i];
} else {
- /* After many attempts, no succees with finding the correct
- * alignment try with allocating a big buffer */
+ /*
+ * After many attempts and no succees with finding the correct
+ * alignment, try with allocating a big buffer.
+ */
dev_warn(base->dev,
"[%s] Failed to get %d pages @ 18 bit align.\n",
__func__, base->lcla_pool.pages);
if (!base->lcla_pool.base_unaligned && base->lcla_pool.base)
free_pages((unsigned long)base->lcla_pool.base,
base->lcla_pool.pages);
- if (base->lcla_pool.base_unaligned)
- kfree(base->lcla_pool.base_unaligned);
+
+ kfree(base->lcla_pool.base_unaligned);
+
if (base->phy_lcpa)
release_mem_region(base->phy_lcpa,
base->lcpa_size);
/*
- * driver/dma/ste_dma40_ll.h
- *
- * Copyright (C) ST-Ericsson 2007-2010
+ * Copyright (C) ST-Ericsson SA 2007-2010
+ * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson SA
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson SA
* License terms: GNU General Public License (GPL) version 2
- * Author: Per Friden <per.friden@stericsson.com>
- * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
*/
#ifndef STE_DMA40_LL_H
#define STE_DMA40_LL_H
/* Physical channels */
void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
- u32 *src_cfg, u32 *dst_cfg, bool is_log);
+ u32 *src_cfg,
+ u32 *dst_cfg,
+ bool is_log);
void d40_log_cfg(struct stedma40_chan_cfg *cfg,
- u32 *lcsp1, u32 *lcsp2);
+ u32 *lcsp1,
+ u32 *lcsp2);
int d40_phy_sg_to_lli(struct scatterlist *sg,
int sg_len,
/* Logical channels */
void d40_log_fill_lli(struct d40_log_lli *lli,
- dma_addr_t data, u32 data_size,
- u32 lli_next_off, u32 reg_cfg,
+ dma_addr_t data,
+ u32 data_size,
+ u32 lli_next_off,
+ u32 reg_cfg,
u32 data_width,
- bool term_int, bool addr_inc);
+ bool term_int,
+ bool addr_inc);
int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
struct scatterlist *sg,
u32 src_data_width,
u32 dst_data_width,
enum dma_data_direction direction,
- dma_addr_t dev_addr, int max_len,
+ dma_addr_t dev_addr,
+ int max_len,
int llis_per_log);
int d40_log_lli_write(struct d40_log_lli_full *lcpa,
struct d40_log_lli *lli_sg,
u32 lcsp13, /* src or dst*/
u32 data_width,
- int max_len, int llis_per_log);
+ int max_len,
+ int llis_per_log);
#endif /* STE_DMA40_LLI_H */
git.openpandora.org / pandora-kernel.git / commitdiff