leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

DMAENGINE: ste_dma40: rewrote LCLA entries allocation code

Browse Source 
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>
This commit is contained in:
Jonas Aaberg 2010-08-09 12:08:56 +00:00 committed by Dan Williams
parent 69f93faa57
commit 698e4732e7
3 changed files with 217 additions and 308 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

315
drivers/dma/ste_dma40.c
View File

@ -11,6 +11,7 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <plat/ste_dma40.h>
@ -29,6 +30,11 @@
/* Hardware requirement on LCLA alignment */
#define LCLA_ALIGNMENT 0x40000
/* Max number of links per event group */
#define D40_LCLA_LINK_PER_EVENT_GRP 128
#define D40_LCLA_END D40_LCLA_LINK_PER_EVENT_GRP
/* Attempts before giving up to trying to get pages that are aligned */
#define MAX_LCLA_ALLOC_ATTEMPTS 256
@ -81,9 +87,8 @@ struct d40_lli_pool {
* @lli_log: Same as above but for logical channels.
* @lli_pool: The pool with two entries pre-allocated.
* @lli_len: Number of llis of current descriptor.
* @lli_count: Number of transfered llis.
* @lli_tx_len: Max number of LLIs per transfer, there can be
* many transfer for one descriptor.
* @lli_current: Number of transfered llis.
* @lcla_alloc: Number of LCLA entries allocated.
* @txd: DMA engine struct. Used for among other things for communication
* during a transfer.
* @node: List entry.
@ -93,7 +98,6 @@ struct d40_lli_pool {
*
* This descriptor is used for both logical and physical transfers.
*/
struct d40_desc {
/* LLI physical */
struct d40_phy_lli_bidir lli_phy;
@ -102,8 +106,8 @@ struct d40_desc {
struct d40_lli_pool lli_pool;
int lli_len;
int lli_count;
u32 lli_tx_len;
int lli_current;
int lcla_alloc;
struct dma_async_tx_descriptor txd;
struct list_head node;
@ -121,17 +125,14 @@ struct d40_desc {
* @pages: The number of pages needed for all physical channels.
* Only used later for clean-up on error
* @lock: Lock to protect the content in this struct.
* @alloc_map: Bitmap mapping between physical channel and LCLA entries.
* @num_blocks: The number of entries of alloc_map. Equals to the
* number of physical channels.
* @alloc_map: big map over which LCLA entry is own by which job.
*/
struct d40_lcla_pool {
void *base;
void *base_unaligned;
int pages;
spinlock_t lock;
u32 *alloc_map;
int num_blocks;
struct d40_desc **alloc_map;
};
/**
@ -202,7 +203,6 @@ struct d40_chan {
u32 src_def_cfg;
u32 dst_def_cfg;
struct d40_def_lcsp log_def;
struct d40_lcla_elem lcla;
struct d40_log_lli_full *lcpa;
/* Runtime reconfiguration */
dma_addr_t runtime_addr;
@ -351,6 +351,67 @@ static void d40_pool_lli_free(struct d40_desc *d40d)
d40d->lli_phy.dst = NULL;
}
static int d40_lcla_alloc_one(struct d40_chan *d40c,
struct d40_desc *d40d)
{
unsigned long flags;
int i;
int ret = -EINVAL;
int p;
spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
p = d40c->phy_chan->num * D40_LCLA_LINK_PER_EVENT_GRP;
/*
* Allocate both src and dst at the same time, therefore the half
* start on 1 since 0 can't be used since zero is used as end marker.
*/
for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) {
if (!d40c->base->lcla_pool.alloc_map[p + i]) {
d40c->base->lcla_pool.alloc_map[p + i] = d40d;
d40d->lcla_alloc++;
ret = i;
break;
}
}
spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return ret;
}
static int d40_lcla_free_all(struct d40_chan *d40c,
struct d40_desc *d40d)
{
unsigned long flags;
int i;
int ret = -EINVAL;
if (d40c->log_num == D40_PHY_CHAN)
return 0;
spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
for (i = 1 ; i < D40_LCLA_LINK_PER_EVENT_GRP / 2; i++) {
if (d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num *
D40_LCLA_LINK_PER_EVENT_GRP + i] == d40d) {
d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num *
D40_LCLA_LINK_PER_EVENT_GRP + i] = NULL;
d40d->lcla_alloc--;
if (d40d->lcla_alloc == 0) {
ret = 0;
break;
}
}
}
spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return ret;
}
static void d40_desc_remove(struct d40_desc *d40d)
{
list_del(&d40d->node);
@ -380,6 +441,8 @@ static struct d40_desc *d40_desc_get(struct d40_chan *d40c)
static void d40_desc_free(struct d40_chan *d40c, struct d40_desc *d40d)
{
d40_lcla_free_all(d40c, d40d);
kmem_cache_free(d40c->base->desc_slab, d40d);
}
@ -388,6 +451,59 @@ static void d40_desc_submit(struct d40_chan *d40c, struct d40_desc *desc)
list_add_tail(&desc->node, &d40c->active);
}
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) {
d40_phy_lli_write(d40c->base->virtbase,
d40c->phy_chan->num,
d40d->lli_phy.dst,
d40d->lli_phy.src);
d40d->lli_current = d40d->lli_len;
} else {
if ((d40d->lli_len - d40d->lli_current) > 1)
curr_lcla = d40_lcla_alloc_one(d40c, d40d);
d40_log_lli_lcpa_write(d40c->lcpa,
&d40d->lli_log.dst[d40d->lli_current],
&d40d->lli_log.src[d40d->lli_current],
curr_lcla);
d40d->lli_current++;
for (; d40d->lli_current < d40d->lli_len; d40d->lli_current++) {
struct d40_log_lli *lcla;
if (d40d->lli_current + 1 < d40d->lli_len)
next_lcla = d40_lcla_alloc_one(d40c, d40d);
else
next_lcla = -EINVAL;
lcla = d40c->base->lcla_pool.base +
d40c->phy_chan->num * 1024 +
8 * curr_lcla * 2;
d40_log_lli_lcla_write(lcla,
&d40d->lli_log.dst[d40d->lli_current],
&d40d->lli_log.src[d40d->lli_current],
next_lcla);
(void) dma_map_single(d40c->base->dev, lcla,
2 * sizeof(struct d40_log_lli),
DMA_TO_DEVICE);
curr_lcla = next_lcla;
if (curr_lcla == -EINVAL) {
d40d->lli_current++;
break;
}
}
}
}
static struct d40_desc *d40_first_active_get(struct d40_chan *d40c)
{
struct d40_desc *d;
@ -433,61 +549,6 @@ static struct d40_desc *d40_last_queued(struct d40_chan *d40c)
/* Support functions for logical channels */
static int d40_lcla_id_get(struct d40_chan *d40c)
{
int src_id = 0;
int dst_id = 0;
struct d40_log_lli *lcla_lidx_base =
d40c->base->lcla_pool.base + d40c->phy_chan->num * 1024;
int i;
int lli_per_log = d40c->base->plat_data->llis_per_log;
unsigned long flags;
if (d40c->lcla.src_id >= 0 && d40c->lcla.dst_id >= 0)
return 0;
if (d40c->base->lcla_pool.num_blocks > 32)
return -EINVAL;
spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
for (i = 0; i < d40c->base->lcla_pool.num_blocks; i++) {
if (!(d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &
(0x1 << i))) {
d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] |=
(0x1 << i);
break;
}
}
src_id = i;
if (src_id >= d40c->base->lcla_pool.num_blocks)
goto err;
for (; i < d40c->base->lcla_pool.num_blocks; i++) {
if (!(d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &
(0x1 << i))) {
d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] |=
(0x1 << i);
break;
}
}
dst_id = i;
if (dst_id == src_id)
goto err;
d40c->lcla.src_id = src_id;
d40c->lcla.dst_id = dst_id;
d40c->lcla.dst = lcla_lidx_base + dst_id * lli_per_log + 1;
d40c->lcla.src = lcla_lidx_base + src_id * lli_per_log + 1;
spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return 0;
err:
spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
return -EINVAL;
}
static int d40_channel_execute_command(struct d40_chan *d40c,
enum d40_command command)
@ -556,7 +617,6 @@ done:
static void d40_term_all(struct d40_chan *d40c)
{
struct d40_desc *d40d;
unsigned long flags;
/* Release active descriptors */
while ((d40d = d40_first_active_get(d40c))) {
@ -570,17 +630,6 @@ static void d40_term_all(struct d40_chan *d40c)
d40_desc_free(d40c, d40d);
}
spin_lock_irqsave(&d40c->base->lcla_pool.lock, flags);
d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &=
(~(0x1 << d40c->lcla.dst_id));
d40c->base->lcla_pool.alloc_map[d40c->phy_chan->num] &=
(~(0x1 << d40c->lcla.src_id));
d40c->lcla.src_id = -1;
d40c->lcla.dst_id = -1;
spin_unlock_irqrestore(&d40c->base->lcla_pool.lock, flags);
d40c->pending_tx = 0;
d40c->busy = false;
@ -682,38 +731,6 @@ static void d40_config_write(struct d40_chan *d40c)
}
}
static void d40_desc_load(struct d40_chan *d40c, struct d40_desc *d40d)
{
if (d40c->log_num == D40_PHY_CHAN) {
d40_phy_lli_write(d40c->base->virtbase,
d40c->phy_chan->num,
d40d->lli_phy.dst,
d40d->lli_phy.src);
} else {
struct d40_log_lli *src = d40d->lli_log.src;
struct d40_log_lli *dst = d40d->lli_log.dst;
int s;
src += d40d->lli_count;
dst += d40d->lli_count;
s = d40_log_lli_write(d40c->lcpa,
d40c->lcla.src, d40c->lcla.dst,
dst, src,
d40c->base->plat_data->llis_per_log);
/* If s equals to zero, the job is not linked */
if (s > 0) {
(void) dma_map_single(d40c->base->dev, d40c->lcla.src,
s * sizeof(struct d40_log_lli),
DMA_TO_DEVICE);
(void) dma_map_single(d40c->base->dev, d40c->lcla.dst,
s * sizeof(struct d40_log_lli),
DMA_TO_DEVICE);
}
}
d40d->lli_count += d40d->lli_tx_len;
}
static u32 d40_residue(struct d40_chan *d40c)
{
u32 num_elt;
@ -942,6 +959,7 @@ static struct d40_desc *d40_queue_start(struct d40_chan *d40c)
* If this job is already linked in hw,
* do not submit it.
*/
if (!d40d->is_hw_linked) {
/* Initiate DMA job */
d40_desc_load(d40c, d40d);
@ -968,8 +986,9 @@ static void dma_tc_handle(struct d40_chan *d40c)
if (d40d == NULL)
return;
if (d40d->lli_count < d40d->lli_len) {
d40_lcla_free_all(d40c, d40d);
if (d40d->lli_current < d40d->lli_len) {
d40_desc_load(d40c, d40d);
/* Start dma job */
(void) d40_start(d40c);
@ -1022,6 +1041,7 @@ static void dma_tasklet(unsigned long data)
} else {
if (!d40d->is_in_client_list) {
d40_desc_remove(d40d);
d40_lcla_free_all(d40c, d40d);
list_add_tail(&d40d->node, &d40c->client);
d40d->is_in_client_list = true;
}
@ -1247,7 +1267,6 @@ static bool d40_alloc_mask_free(struct d40_phy_res *phy, bool is_src,
spin_lock_irqsave(&phy->lock, flags);
if (!log_event_line) {
/* Physical interrupts are masked per physical full channel */
phy->allocated_dst = D40_ALLOC_FREE;
phy->allocated_src = D40_ALLOC_FREE;
is_free = true;
@ -1633,21 +1652,10 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
goto err;
d40d->lli_len = sgl_len;
d40d->lli_tx_len = d40d->lli_len;
d40d->lli_current = 0;
d40d->txd.flags = dma_flags;
if (d40c->log_num != D40_PHY_CHAN) {
if (d40d->lli_len > d40c->base->plat_data->llis_per_log)
d40d->lli_tx_len = d40c->base->plat_data->llis_per_log;
if (sgl_len > 1)
/*
* Check if there is space available in lcla. If not,
* split list into 1-length and run only in lcpa
* space.
*/
if (d40_lcla_id_get(d40c) != 0)
d40d->lli_tx_len = 1;
if (d40_pool_lli_alloc(d40d, sgl_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
@ -1655,25 +1663,17 @@ struct dma_async_tx_descriptor *stedma40_memcpy_sg(struct dma_chan *chan,
goto err;
}
(void) d40_log_sg_to_lli(d40c->lcla.src_id,
sgl_src,
(void) d40_log_sg_to_lli(sgl_src,
sgl_len,
d40d->lli_log.src,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
d40c->dma_cfg.src_info.data_width);
(void) d40_log_sg_to_lli(d40c->lcla.dst_id,
sgl_dst,
(void) d40_log_sg_to_lli(sgl_dst,
sgl_len,
d40d->lli_log.dst,
d40c->log_def.lcsp3,
d40c->dma_cfg.dst_info.data_width,
d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
d40c->dma_cfg.dst_info.data_width);
} else {
if (d40_pool_lli_alloc(d40d, sgl_len, false) < 0) {
dev_err(&d40c->chan.dev->device,
@ -1869,23 +1869,21 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
goto err;
}
d40d->lli_len = 1;
d40d->lli_tx_len = 1;
d40d->lli_current = 0;
d40_log_fill_lli(d40d->lli_log.src,
src,
size,
0,
d40c->log_def.lcsp1,
d40c->dma_cfg.src_info.data_width,
false, true);
true);
d40_log_fill_lli(d40d->lli_log.dst,
dst,
size,
0,
d40c->log_def.lcsp3,
d40c->dma_cfg.dst_info.data_width,
true, true);
true);
} else {
@ -1953,19 +1951,7 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
}
d40d->lli_len = sg_len;
if (d40d->lli_len <= d40c->base->plat_data->llis_per_log)
d40d->lli_tx_len = d40d->lli_len;
else
d40d->lli_tx_len = d40c->base->plat_data->llis_per_log;
if (sg_len > 1)
/*
* Check if there is space available in lcla.
* If not, split list into 1-length and run only
* in lcpa space.
*/
if (d40_lcla_id_get(d40c) != 0)
d40d->lli_tx_len = 1;
d40d->lli_current = 0;
if (direction == DMA_FROM_DEVICE)
if (d40c->runtime_addr)
@ -1981,15 +1967,13 @@ static int d40_prep_slave_sg_log(struct d40_desc *d40d,
else
return -EINVAL;
total_size = d40_log_sg_to_dev(&d40c->lcla,
sgl, sg_len,
total_size = d40_log_sg_to_dev(sgl, sg_len,
&d40d->lli_log,
&d40c->log_def,
d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.data_width,
direction,
dev_addr, d40d->lli_tx_len,
d40c->base->plat_data->llis_per_log);
dev_addr);
if (total_size < 0)
return -EINVAL;
@ -2015,7 +1999,7 @@ static int d40_prep_slave_sg_phy(struct d40_desc *d40d,
}
d40d->lli_len = sgl_len;
d40d->lli_tx_len = sgl_len;
d40d->lli_current = 0;
if (direction == DMA_FROM_DEVICE) {
dst_dev_addr = 0;
@ -2323,10 +2307,6 @@ static void __init d40_chan_init(struct d40_base *base, struct dma_device *dma,
d40c->base = base;
d40c->chan.device = dma;
/* Invalidate lcla element */
d40c->lcla.src_id = -1;
d40c->lcla.dst_id = -1;
spin_lock_init(&d40c->lock);
d40c->log_num = D40_PHY_CHAN;
@ -2631,7 +2611,10 @@ static struct d40_base * __init d40_hw_detect_init(struct platform_device *pdev)
if (!base->lookup_log_chans)
goto failure;
}
base->lcla_pool.alloc_map = kzalloc(num_phy_chans * sizeof(u32),
base->lcla_pool.alloc_map = kzalloc(num_phy_chans *
sizeof(struct d40_desc *) *
D40_LCLA_LINK_PER_EVENT_GRP,
GFP_KERNEL);
if (!base->lcla_pool.alloc_map)
goto failure;
@ -2878,8 +2861,6 @@ static int __init d40_probe(struct platform_device *pdev)
spin_lock_init(&base->lcla_pool.lock);
base->lcla_pool.num_blocks = base->num_phy_chans;
base->irq = platform_get_irq(pdev, 0);
ret = request_irq(base->irq, d40_handle_interrupt, 0, D40_NAME, base);

159
drivers/dma/ste_dma40_ll.c
View File

@ -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;
@ -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;
}

49
drivers/dma/ste_dma40_ll.h
View File

@ -268,22 +268,6 @@ struct d40_def_lcsp {
u32 lcsp1;
};
/**
* struct d40_lcla_elem - Info for one LCA element.
*
* @src_id: logical channel src id
* @dst_id: logical channel dst id
* @src: LCPA formated src parameters
* @dst: LCPA formated dst parameters
*
*/
struct d40_lcla_elem {
int src_id;
int dst_id;
struct d40_log_lli *src;
struct d40_log_lli *dst;
};
/* Physical channels */
void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
@ -324,38 +308,33 @@ void d40_phy_lli_write(void __iomem *virtbase,
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 data_width,
bool term_int,
bool addr_inc);
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 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);
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);
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);
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);
#endif /* STE_DMA40_LLI_H */