lkml.org 
[lkml]   [2011]   [Jan]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 14/32] dma40: implement prep_memcpy as a wrapper around memcpy_sg
Date
From: Rabin Vincent <rabin.vincent@stericsson.com>

To simplify the code.

Acked-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
---
drivers/dma/ste_dma40.c | 107 ++++----------------------------------------
drivers/dma/ste_dma40_ll.c | 2 +-
drivers/dma/ste_dma40_ll.h | 11 -----
3 files changed, 10 insertions(+), 110 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index bd72269..0a20179 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1863,108 +1863,19 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
size_t size,
unsigned long dma_flags)
{
- struct d40_desc *d40d;
- struct d40_chan *d40c = container_of(chan, struct d40_chan,
- chan);
- unsigned long flags;
-
- if (d40c->phy_chan == NULL) {
- chan_err(d40c, "Channel is not allocated.\n");
- return ERR_PTR(-EINVAL);
- }
-
- spin_lock_irqsave(&d40c->lock, flags);
- d40d = d40_desc_get(d40c);
-
- if (d40d == NULL) {
- chan_err(d40c, "Descriptor is NULL\n");
- goto err;
- }
-
- d40d->txd.flags = dma_flags;
- d40d->lli_len = d40_size_2_dmalen(size,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width);
- if (d40d->lli_len < 0) {
- chan_err(d40c, "Unaligned size\n");
- goto err;
- }
-
-
- dma_async_tx_descriptor_init(&d40d->txd, chan);
-
- d40d->txd.tx_submit = d40_tx_submit;
-
- if (chan_is_logical(d40c)) {
-
- if (d40_pool_lli_alloc(d40c,d40d, d40d->lli_len, true) < 0) {
- chan_err(d40c, "Out of memory\n");
- goto err;
- }
- d40d->lli_current = 0;
-
- if (d40_log_buf_to_lli(d40d->lli_log.src,
- src,
- size,
- d40c->log_def.lcsp1,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- true) == NULL)
- goto err;
-
- if (d40_log_buf_to_lli(d40d->lli_log.dst,
- dst,
- size,
- d40c->log_def.lcsp3,
- d40c->dma_cfg.dst_info.data_width,
- d40c->dma_cfg.src_info.data_width,
- true) == NULL)
- goto err;
-
- } else {
-
- if (d40_pool_lli_alloc(d40c, d40d, d40d->lli_len, false) < 0) {
- chan_err(d40c, "Out of memory\n");
- goto err;
- }
-
- if (d40_phy_buf_to_lli(d40d->lli_phy.src,
- src,
- size,
- d40c->dma_cfg.src_info.psize,
- 0,
- d40c->src_def_cfg,
- true,
- d40c->dma_cfg.src_info.data_width,
- d40c->dma_cfg.dst_info.data_width,
- false) == NULL)
- goto err;
+ struct scatterlist dst_sg;
+ struct scatterlist src_sg;

- if (d40_phy_buf_to_lli(d40d->lli_phy.dst,
- dst,
- size,
- d40c->dma_cfg.dst_info.psize,
- 0,
- d40c->dst_def_cfg,
- true,
- d40c->dma_cfg.dst_info.data_width,
- d40c->dma_cfg.src_info.data_width,
- false) == NULL)
- goto err;
+ sg_init_table(&dst_sg, 1);
+ sg_init_table(&src_sg, 1);

- dma_sync_single_for_device(d40c->base->dev,
- d40d->lli_pool.dma_addr,
- d40d->lli_pool.size, DMA_TO_DEVICE);
- }
+ sg_dma_address(&dst_sg) = dst;
+ sg_dma_address(&src_sg) = src;

- spin_unlock_irqrestore(&d40c->lock, flags);
- return &d40d->txd;
+ sg_dma_len(&dst_sg) = size;
+ sg_dma_len(&src_sg) = size;

-err:
- if (d40d)
- d40_desc_free(d40c, d40d);
- spin_unlock_irqrestore(&d40c->lock, flags);
- return NULL;
+ return stedma40_memcpy_sg(chan, &dst_sg, &src_sg, 1, dma_flags);
}

static struct dma_async_tx_descriptor *
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 6f03f58..552c597 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -198,7 +198,7 @@ static int d40_seg_size(int size, int data_width1, int data_width2)
return seg_max;
}

-struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
+static struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
dma_addr_t addr,
u32 size,
int psize,
diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h
index e93f394..a5d7171 100644
--- a/drivers/dma/ste_dma40_ll.h
+++ b/drivers/dma/ste_dma40_ll.h
@@ -312,17 +312,6 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
u32 data_width2,
int psize);

-struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
- dma_addr_t data,
- u32 data_size,
- int psize,
- dma_addr_t next_lli,
- u32 reg_cfg,
- bool term_int,
- u32 data_width1,
- u32 data_width2,
- bool is_device);
-
void d40_phy_lli_write(void __iomem *virtbase,
u32 phy_chan_num,
struct d40_phy_lli *lli_dst,
--
1.7.3.2


\
 
 \ /
  Last update: 2011-01-25 11:35    [from the cache]
©2003-2011 Jasper Spaans