aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/dma/ste_dma40_ll.c
diff options
context:
space:
mode:
authorJonas Aaberg <jonas.aberg@stericsson.com>2010-08-09 12:08:56 +0000
committerDan Williams <dan.j.williams@intel.com>2010-09-22 14:53:46 -0700
commit698e4732e7c9cf9f1f3eac2b8cdce8d4fe2b90bd (patch)
tree9716c813accd1f8f5f5fe6d4ad389fd64396c26d /drivers/dma/ste_dma40_ll.c
parent69f93faa57ed6c91b32aae1dcff7282fcb2872f5 (diff)
downloadmrst-s0i3-test-698e4732e7c9cf9f1f3eac2b8cdce8d4fe2b90bd.tar.gz
mrst-s0i3-test-698e4732e7c9cf9f1f3eac2b8cdce8d4fe2b90bd.tar.xz
mrst-s0i3-test-698e4732e7c9cf9f1f3eac2b8cdce8d4fe2b90bd.zip
DMAENGINE: ste_dma40: rewrote LCLA entries allocation code
LLI allocation is now done on job level instead of channel level. Previously the maximum length of a linked job in hw on a logical channel was 8, since the LLIs where evenly divided. Now only executing jobs have allocated LLIs which increase the length to a maximum of 64 links in HW. Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/ste_dma40_ll.c')
-rw-r--r--drivers/dma/ste_dma40_ll.c161
1 files changed, 55 insertions, 106 deletions
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 92a0960fba0..86a306dbe1b 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -37,16 +37,13 @@ void d40_log_cfg(struct stedma40_chan_cfg *cfg,
cfg->dir == STEDMA40_PERIPH_TO_PERIPH)
l3 |= 1 << D40_MEM_LCSP3_DCFG_MST_POS;
- l3 |= 1 << D40_MEM_LCSP3_DCFG_TIM_POS;
l3 |= 1 << D40_MEM_LCSP3_DCFG_EIM_POS;
l3 |= cfg->dst_info.psize << D40_MEM_LCSP3_DCFG_PSIZE_POS;
l3 |= cfg->dst_info.data_width << D40_MEM_LCSP3_DCFG_ESIZE_POS;
- l3 |= 1 << D40_MEM_LCSP3_DTCP_POS;
l1 |= 1 << D40_MEM_LCSP1_SCFG_EIM_POS;
l1 |= cfg->src_info.psize << D40_MEM_LCSP1_SCFG_PSIZE_POS;
l1 |= cfg->src_info.data_width << D40_MEM_LCSP1_SCFG_ESIZE_POS;
- l1 |= 1 << D40_MEM_LCSP1_STCP_POS;
*lcsp1 = l1;
*lcsp3 = l3;
@@ -235,7 +232,7 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
}
return total_size;
- err:
+err:
return err;
}
@@ -268,11 +265,59 @@ void d40_phy_lli_write(void __iomem *virtbase,
/* DMA logical lli operations */
+static void d40_log_lli_link(struct d40_log_lli *lli_dst,
+ struct d40_log_lli *lli_src,
+ int next)
+{
+ u32 slos = 0;
+ u32 dlos = 0;
+
+ if (next != -EINVAL) {
+ slos = next * 2;
+ dlos = next * 2 + 1;
+ } else {
+ lli_dst->lcsp13 |= D40_MEM_LCSP1_SCFG_TIM_MASK;
+ lli_dst->lcsp13 |= D40_MEM_LCSP3_DTCP_MASK;
+ }
+
+ lli_src->lcsp13 = (lli_src->lcsp13 & ~D40_MEM_LCSP1_SLOS_MASK) |
+ (slos << D40_MEM_LCSP1_SLOS_POS);
+
+ lli_dst->lcsp13 = (lli_dst->lcsp13 & ~D40_MEM_LCSP1_SLOS_MASK) |
+ (dlos << D40_MEM_LCSP1_SLOS_POS);
+}
+
+void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
+ struct d40_log_lli *lli_dst,
+ struct d40_log_lli *lli_src,
+ int next)
+{
+ d40_log_lli_link(lli_dst, lli_src, next);
+
+ writel(lli_src->lcsp02, &lcpa[0].lcsp0);
+ writel(lli_src->lcsp13, &lcpa[0].lcsp1);
+ writel(lli_dst->lcsp02, &lcpa[0].lcsp2);
+ writel(lli_dst->lcsp13, &lcpa[0].lcsp3);
+}
+
+void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
+ struct d40_log_lli *lli_dst,
+ struct d40_log_lli *lli_src,
+ int next)
+{
+ d40_log_lli_link(lli_dst, lli_src, next);
+
+ writel(lli_src->lcsp02, &lcla[0].lcsp02);
+ writel(lli_src->lcsp13, &lcla[0].lcsp13);
+ writel(lli_dst->lcsp02, &lcla[1].lcsp02);
+ writel(lli_dst->lcsp13, &lcla[1].lcsp13);
+}
+
void d40_log_fill_lli(struct d40_log_lli *lli,
dma_addr_t data, u32 data_size,
- u32 lli_next_off, u32 reg_cfg,
+ u32 reg_cfg,
u32 data_width,
- bool term_int, bool addr_inc)
+ bool addr_inc)
{
lli->lcsp13 = reg_cfg;
@@ -287,165 +332,69 @@ void d40_log_fill_lli(struct d40_log_lli *lli,
if (addr_inc)
lli->lcsp13 |= D40_MEM_LCSP1_SCFG_INCR_MASK;
- lli->lcsp13 |= D40_MEM_LCSP3_DTCP_MASK;
- /* If this scatter list entry is the last one, no next link */
- lli->lcsp13 |= (lli_next_off << D40_MEM_LCSP1_SLOS_POS) &
- D40_MEM_LCSP1_SLOS_MASK;
-
- if (term_int)
- lli->lcsp13 |= D40_MEM_LCSP1_SCFG_TIM_MASK;
- else
- lli->lcsp13 &= ~D40_MEM_LCSP1_SCFG_TIM_MASK;
}
-int d40_log_sg_to_dev(struct d40_lcla_elem *lcla,
- struct scatterlist *sg,
+int d40_log_sg_to_dev(struct scatterlist *sg,
int sg_len,
struct d40_log_lli_bidir *lli,
struct d40_def_lcsp *lcsp,
u32 src_data_width,
u32 dst_data_width,
enum dma_data_direction direction,
- dma_addr_t dev_addr, int max_len,
- int llis_per_log)
+ dma_addr_t dev_addr)
{
int total_size = 0;
struct scatterlist *current_sg = sg;
int i;
- u32 next_lli_off_dst = 0;
- u32 next_lli_off_src = 0;
for_each_sg(sg, current_sg, sg_len, i) {
total_size += sg_dma_len(current_sg);
- /*
- * If this scatter list entry is the last one or
- * max length, terminate link.
- */
- if (sg_len - 1 == i || ((i+1) % max_len == 0)) {
- next_lli_off_src = 0;
- next_lli_off_dst = 0;
- } else {
- if (next_lli_off_dst == 0 &&
- next_lli_off_src == 0) {
- /* The first lli will be at next_lli_off */
- next_lli_off_dst = (lcla->dst_id *
- llis_per_log + 1);
- next_lli_off_src = (lcla->src_id *
- llis_per_log + 1);
- } else {
- next_lli_off_dst++;
- next_lli_off_src++;
- }
- }
-
if (direction == DMA_TO_DEVICE) {
d40_log_fill_lli(&lli->src[i],
sg_phys(current_sg),
sg_dma_len(current_sg),
- next_lli_off_src,
lcsp->lcsp1, src_data_width,
- false,
true);
d40_log_fill_lli(&lli->dst[i],
dev_addr,
sg_dma_len(current_sg),
- next_lli_off_dst,
lcsp->lcsp3, dst_data_width,
- /* No next == terminal interrupt */
- !next_lli_off_dst,
false);
} else {
d40_log_fill_lli(&lli->dst[i],
sg_phys(current_sg),
sg_dma_len(current_sg),
- next_lli_off_dst,
lcsp->lcsp3, dst_data_width,
- /* No next == terminal interrupt */
- !next_lli_off_dst,
true);
d40_log_fill_lli(&lli->src[i],
dev_addr,
sg_dma_len(current_sg),
- next_lli_off_src,
lcsp->lcsp1, src_data_width,
- false,
false);
}
}
return total_size;
}
-int d40_log_sg_to_lli(int lcla_id,
- struct scatterlist *sg,
+int d40_log_sg_to_lli(struct scatterlist *sg,
int sg_len,
struct d40_log_lli *lli_sg,
u32 lcsp13, /* src or dst*/
- u32 data_width,
- int max_len, int llis_per_log)
+ u32 data_width)
{
int total_size = 0;
struct scatterlist *current_sg = sg;
int i;
- u32 next_lli_off = 0;
for_each_sg(sg, current_sg, sg_len, i) {
total_size += sg_dma_len(current_sg);
- /*
- * If this scatter list entry is the last one or
- * max length, terminate link.
- */
- if (sg_len - 1 == i || ((i+1) % max_len == 0))
- next_lli_off = 0;
- else {
- if (next_lli_off == 0)
- /* The first lli will be at next_lli_off */
- next_lli_off = lcla_id * llis_per_log + 1;
- else
- next_lli_off++;
- }
-
d40_log_fill_lli(&lli_sg[i],
sg_phys(current_sg),
sg_dma_len(current_sg),
- next_lli_off,
lcsp13, data_width,
- !next_lli_off,
true);
}
return total_size;
}
-
-int d40_log_lli_write(struct d40_log_lli_full *lcpa,
- struct d40_log_lli *lcla_src,
- struct d40_log_lli *lcla_dst,
- struct d40_log_lli *lli_dst,
- struct d40_log_lli *lli_src,
- int llis_per_log)
-{
- u32 slos;
- u32 dlos;
- int i;
-
- writel(lli_src->lcsp02, &lcpa->lcsp0);
- writel(lli_src->lcsp13, &lcpa->lcsp1);
- writel(lli_dst->lcsp02, &lcpa->lcsp2);
- writel(lli_dst->lcsp13, &lcpa->lcsp3);
-
- slos = lli_src->lcsp13 & D40_MEM_LCSP1_SLOS_MASK;
- dlos = lli_dst->lcsp13 & D40_MEM_LCSP3_DLOS_MASK;
-
- for (i = 0; (i < llis_per_log) && slos && dlos; i++) {
- writel(lli_src[i + 1].lcsp02, &lcla_src[i].lcsp02);
- writel(lli_src[i + 1].lcsp13, &lcla_src[i].lcsp13);
- writel(lli_dst[i + 1].lcsp02, &lcla_dst[i].lcsp02);
- writel(lli_dst[i + 1].lcsp13, &lcla_dst[i].lcsp13);
-
- slos = lli_src[i + 1].lcsp13 & D40_MEM_LCSP1_SLOS_MASK;
- dlos = lli_dst[i + 1].lcsp13 & D40_MEM_LCSP3_DLOS_MASK;
- }
-
- return i;
-
-}