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Date: Tue, 25 Jan 2011 11:18:08 +0100
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Dan Williams <dan.j.williams@...el.com>
Cc: <linux-kernel@...r.kernel.org>, Lee Jones <lee.jones@...aro.org>,
Rabin Vincent <rabin.vincent@...ricsson.com>,
Linus Walleij <linus.walleij@...ricsson.com>
Subject: [PATCH 05/32] dma40: use helpers for channel type check
From: Rabin Vincent <rabin.vincent@...ricsson.com>
The somewhat confusing check
d40c->log_num == D40_PHY_CHAN
and its variants are used in several places to check if a channel is logical or
physical. Use appropriately named helpers to do this to make the code more
readable.
Acked-by: Per Forlin <per.forlin@...ricsson.com>
Acked-by: Jonas Aaberg <jonas.aberg@...ricsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@...ricsson.com>
Signed-off-by: Linus Walleij <linus.walleij@...ricsson.com>
---
drivers/dma/ste_dma40.c | 54 +++++++++++++++++++++++++++-------------------
1 files changed, 32 insertions(+), 22 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 3d4cea3..0073988 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -306,6 +306,16 @@ static struct device *chan2dev(struct d40_chan *d40c)
return &d40c->chan.dev->device;
}
+static bool chan_is_physical(struct d40_chan *chan)
+{
+ return chan->log_num == D40_PHY_CHAN;
+}
+
+static bool chan_is_logical(struct d40_chan *chan)
+{
+ return !chan_is_physical(chan);
+}
+
static void __iomem *chan_base(struct d40_chan *chan)
{
return chan->base->virtbase + D40_DREG_PCBASE +
@@ -400,7 +410,7 @@ static int d40_lcla_free_all(struct d40_chan *d40c,
int i;
int ret = -EINVAL;
- if (d40c->log_num == D40_PHY_CHAN)
+ if (chan_is_physical(d40c))
return 0;
spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
@@ -472,7 +482,7 @@ static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
{
int curr_lcla = -EINVAL, next_lcla;
- if (d40c->log_num == D40_PHY_CHAN) {
+ if (chan_is_physical(d40c)) {
d40_phy_lli_write(d40c->base->virtbase,
d40c->phy_chan->num,
d40d->lli_phy.dst,
@@ -788,7 +798,7 @@ static u32 d40_get_prmo(struct d40_chan *d40c)
= D40_DREG_PRMO_LCHAN_SRC_LOG_DST_LOG,
};
- if (d40c->log_num == D40_PHY_CHAN)
+ if (chan_is_physical(d40c))
return phy_map[d40c->dma_cfg.mode_opt];
else
return log_map[d40c->dma_cfg.mode_opt];
@@ -802,7 +812,7 @@ static void d40_config_write(struct d40_chan *d40c)
/* Odd addresses are even addresses + 4 */
addr_base = (d40c->phy_chan->num % 2) * 4;
/* Setup channel mode to logical or physical */
- var = ((u32)(d40c->log_num != D40_PHY_CHAN) + 1) <<
+ var = ((u32)(chan_is_logical(d40c)) + 1) <<
D40_CHAN_POS(d40c->phy_chan->num);
writel(var, d40c->base->virtbase + D40_DREG_PRMSE + addr_base);
@@ -811,7 +821,7 @@ static void d40_config_write(struct d40_chan *d40c)
writel(var, d40c->base->virtbase + D40_DREG_PRMOE + addr_base);
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
int lidx = (d40c->phy_chan->num << D40_SREG_ELEM_LOG_LIDX_POS)
& D40_SREG_ELEM_LOG_LIDX_MASK;
void __iomem *chanbase = chan_base(d40c);
@@ -830,7 +840,7 @@ static u32 d40_residue(struct d40_chan *d40c)
{
u32 num_elt;
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
num_elt = (readl(&d40c->lcpa->lcsp2) & D40_MEM_LCSP2_ECNT_MASK)
>> D40_MEM_LCSP2_ECNT_POS;
else {
@@ -846,7 +856,7 @@ static bool d40_tx_is_linked(struct d40_chan *d40c)
{
bool is_link;
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
is_link = readl(&d40c->lcpa->lcsp3) & D40_MEM_LCSP3_DLOS_MASK;
else
is_link = readl(chan_base(d40c) + D40_CHAN_REG_SDLNK)
@@ -869,7 +879,7 @@ static int d40_pause(struct dma_chan *chan)
res = d40_channel_execute_command(d40c, D40_DMA_SUSPEND_REQ);
if (res == 0) {
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
d40_config_set_event(d40c, false);
/* Resume the other logical channels if any */
if (d40_chan_has_events(d40c))
@@ -895,7 +905,7 @@ static int d40_resume(struct dma_chan *chan)
spin_lock_irqsave(&d40c->lock, flags);
if (d40c->base->rev == 0)
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
res = d40_channel_execute_command(d40c,
D40_DMA_SUSPEND_REQ);
goto no_suspend;
@@ -904,7 +914,7 @@ static int d40_resume(struct dma_chan *chan)
/* If bytes left to transfer or linked tx resume job */
if (d40_residue(d40c) || d40_tx_is_linked(d40c)) {
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
d40_config_set_event(d40c, true);
res = d40_channel_execute_command(d40c, D40_DMA_RUN);
@@ -944,7 +954,7 @@ static int d40_start(struct d40_chan *d40c)
if (d40c->base->rev == 0) {
int err;
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
err = d40_channel_execute_command(d40c,
D40_DMA_SUSPEND_REQ);
if (err)
@@ -952,7 +962,7 @@ static int d40_start(struct d40_chan *d40c)
}
}
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
d40_config_set_event(d40c, true);
return d40_channel_execute_command(d40c, D40_DMA_RUN);
@@ -1495,7 +1505,7 @@ static int d40_free_dma(struct d40_chan *d40c)
return res;
}
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
/* Release logical channel, deactivate the event line */
d40_config_set_event(d40c, false);
@@ -1548,7 +1558,7 @@ static bool d40_is_paused(struct d40_chan *d40c)
spin_lock_irqsave(&d40c->lock, flags);
- if (d40c->log_num == D40_PHY_CHAN) {
+ if (chan_is_physical(d40c)) {
if (d40c->phy_chan->num % 2 == 0)
active_reg = d40c->base->virtbase + D40_DREG_ACTIVE;
else
@@ -1638,7 +1648,7 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
d40d->lli_current = 0;
d40d->txd.flags = dma_flags;
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
@@ -1765,9 +1775,9 @@ static int d40_alloc_chan_resources(struct dma_chan *chan)
/* Fill in basic CFG register values */
d40_phy_cfg(&d40c->dma_cfg, &d40c->src_def_cfg,
- &d40c->dst_def_cfg, d40c->log_num != D40_PHY_CHAN);
+ &d40c->dst_def_cfg, chan_is_logical(d40c));
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
d40_log_cfg(&d40c->dma_cfg,
&d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
@@ -1857,7 +1867,7 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
d40d->txd.tx_submit = d40_tx_submit;
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
@@ -2093,7 +2103,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
if (d40d == NULL)
goto err;
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
err = d40_prep_slave_sg_log(d40d, d40c, sgl, sg_len,
direction, dma_flags);
else
@@ -2103,7 +2113,7 @@ static struct dma_async_tx_descriptor *d40_prep_slave_sg(struct dma_chan *chan,
dev_err(&d40c->chan.dev->device,
"[%s] Failed to prepare %s slave sg job: %d\n",
__func__,
- d40c->log_num != D40_PHY_CHAN ? "log" : "phy", err);
+ chan_is_logical(d40c) ? "log" : "phy", err);
goto err;
}
@@ -2253,7 +2263,7 @@ static void d40_set_runtime_config(struct dma_chan *chan,
return;
}
- if (d40c->log_num != D40_PHY_CHAN) {
+ if (chan_is_logical(d40c)) {
if (config_maxburst >= 16)
psize = STEDMA40_PSIZE_LOG_16;
else if (config_maxburst >= 8)
@@ -2286,7 +2296,7 @@ static void d40_set_runtime_config(struct dma_chan *chan,
cfg->dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL;
/* Fill in register values */
- if (d40c->log_num != D40_PHY_CHAN)
+ if (chan_is_logical(d40c))
d40_log_cfg(cfg, &d40c->log_def.lcsp1, &d40c->log_def.lcsp3);
else
d40_phy_cfg(cfg, &d40c->src_def_cfg,
--
1.7.3.2
--
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