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dma40: use flags to reduce parameter count

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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>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Rabin Vincent 2011-01-25 11:18:30 +01:00 committed by Dan Williams
parent 1f7622ca55
commit 7f933bed96
2 changed files with 52 additions and 37 deletions
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84
drivers/dma/ste_dma40_ll.c
View File

@ -127,10 +127,11 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli,
u32 data_size,
dma_addr_t next_lli,
u32 reg_cfg,
bool term_int,
bool is_device,
struct stedma40_half_channel_info *info)
struct stedma40_half_channel_info *info,
unsigned int flags)
{
bool addr_inc = flags & LLI_ADDR_INC;
bool term_int = flags & LLI_TERM_INT;
unsigned int data_width = info->data_width;
int psize = info->psize;
int num_elems;
@ -155,7 +156,7 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli,
* Distance to next element sized entry.
* Usually the size of the element unless you want gaps.
*/
if (!is_device)
if (addr_inc)
lli->reg_elt |= (0x1 << data_width) <<
D40_SREG_ELEM_PHY_EIDX_POS;
@ -201,40 +202,45 @@ static int d40_seg_size(int size, int data_width1, int data_width2)
static struct d40_phy_lli *
d40_phy_buf_to_lli(struct d40_phy_lli *lli, dma_addr_t addr, u32 size,
dma_addr_t lli_phys, u32 reg_cfg, bool term_int,
bool is_device, struct stedma40_half_channel_info *info,
struct stedma40_half_channel_info *otherinfo)
dma_addr_t lli_phys, u32 reg_cfg,
struct stedma40_half_channel_info *info,
struct stedma40_half_channel_info *otherinfo,
unsigned long flags)
{
bool addr_inc = flags & LLI_ADDR_INC;
bool term_int = flags & LLI_TERM_INT;
int err;
dma_addr_t next = lli_phys;
int size_rest = size;
int size_seg = 0;
/*
* This piece may be split up based on d40_seg_size(); we only want the
* term int on the last part.
*/
if (term_int)
flags &= ~LLI_TERM_INT;
do {
size_seg = d40_seg_size(size_rest, info->data_width,
otherinfo->data_width);
size_rest -= size_seg;
if (term_int && size_rest == 0)
if (term_int && size_rest == 0) {
next = 0;
else
flags |= LLI_TERM_INT;
} else
next = ALIGN(next + sizeof(struct d40_phy_lli),
D40_LLI_ALIGN);
err = d40_phy_fill_lli(lli,
addr,
size_seg,
next,
reg_cfg,
!next,
is_device,
info);
err = d40_phy_fill_lli(lli, addr, size_seg, next,
reg_cfg, info, flags);
if (err)
goto err;
lli++;
if (!is_device)
if (addr_inc)
addr += size_seg;
} while (size_rest);
@ -256,31 +262,29 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
int total_size = 0;
int i;
struct scatterlist *current_sg = sg;
dma_addr_t dst;
struct d40_phy_lli *lli = lli_sg;
dma_addr_t l_phys = lli_phys;
unsigned long flags = 0;
if (!target)
flags |= LLI_ADDR_INC;
for_each_sg(sg, current_sg, sg_len, i) {
dma_addr_t sg_addr = sg_dma_address(current_sg);
unsigned int len = sg_dma_len(current_sg);
dma_addr_t dst = target ?: sg_addr;
total_size += sg_dma_len(current_sg);
if (target)
dst = target;
else
dst = sg_dma_address(current_sg);
if (i == sg_len - 1)
flags |= LLI_TERM_INT;
l_phys = ALIGN(lli_phys + (lli - lli_sg) *
sizeof(struct d40_phy_lli), D40_LLI_ALIGN);
lli = d40_phy_buf_to_lli(lli,
dst,
sg_dma_len(current_sg),
l_phys,
reg_cfg,
sg_len - 1 == i,
target == dst,
info,
otherinfo);
lli = d40_phy_buf_to_lli(lli, dst, len, l_phys,
reg_cfg, info, otherinfo, flags);
if (lli == NULL)
return -EINVAL;
}
@ -343,8 +347,10 @@ static void d40_log_fill_lli(struct d40_log_lli *lli,
dma_addr_t data, u32 data_size,
u32 reg_cfg,
u32 data_width,
bool addr_inc)
unsigned int flags)
{
bool addr_inc = flags & LLI_ADDR_INC;
lli->lcsp13 = reg_cfg;
/* The number of elements to transfer */
@ -369,8 +375,9 @@ static struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
u32 lcsp13, /* src or dst*/
u32 data_width1,
u32 data_width2,
bool addr_inc)
unsigned int flags)
{
bool addr_inc = flags & LLI_ADDR_INC;
struct d40_log_lli *lli = lli_sg;
int size_rest = size;
int size_seg = 0;
@ -383,7 +390,7 @@ static struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
addr,
size_seg,
lcsp13, data_width1,
addr_inc);
flags);
if (addr_inc)
addr += size_seg;
lli++;
@ -403,7 +410,10 @@ int d40_log_sg_to_lli(struct scatterlist *sg,
struct scatterlist *current_sg = sg;
int i;
struct d40_log_lli *lli = lli_sg;
bool autoinc = !dev_addr;
unsigned long flags = 0;
if (!dev_addr)
flags |= LLI_ADDR_INC;
for_each_sg(sg, current_sg, sg_len, i) {
dma_addr_t sg_addr = sg_dma_address(current_sg);
@ -416,7 +426,7 @@ int d40_log_sg_to_lli(struct scatterlist *sg,
lcsp13,
data_width1,
data_width2,
autoinc);
flags);
}
return total_size;

5
drivers/dma/ste_dma40_ll.h
View File

@ -293,6 +293,11 @@ struct d40_def_lcsp {
/* Physical channels */
enum d40_lli_flags {
LLI_ADDR_INC = 1 << 0,
LLI_TERM_INT = 1 << 1,
};
void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
u32 *src_cfg,
u32 *dst_cfg,