/*
- * Copyright (C) ST-Ericsson SA 2007-2010
+ * Copyright (C) Ericsson AB 2007-2008
+ * Copyright (C) ST-Ericsson SA 2008-2010
* Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
* Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
return d;
}
-/* Support functions for logical channels */
+static int d40_psize_2_burst_size(bool is_log, int psize)
+{
+ if (is_log) {
+ if (psize == STEDMA40_PSIZE_LOG_1)
+ return 1;
+ } else {
+ if (psize == STEDMA40_PSIZE_PHY_1)
+ return 1;
+ }
+
+ return 2 << psize;
+}
+
+/*
+ * The dma only supports transmitting packages up to
+ * STEDMA40_MAX_SEG_SIZE << data_width. Calculate the total number of
+ * dma elements required to send the entire sg list
+ */
+static int d40_size_2_dmalen(int size, u32 data_width1, u32 data_width2)
+{
+ int dmalen;
+ u32 max_w = max(data_width1, data_width2);
+ u32 min_w = min(data_width1, data_width2);
+ u32 seg_max = ALIGN(STEDMA40_MAX_SEG_SIZE << min_w, 1 << max_w);
+
+ if (seg_max > STEDMA40_MAX_SEG_SIZE)
+ seg_max -= (1 << max_w);
+
+ if (!IS_ALIGNED(size, 1 << max_w))
+ return -EINVAL;
+
+ if (size <= seg_max)
+ dmalen = 1;
+ else {
+ dmalen = size / seg_max;
+ if (dmalen * seg_max < size)
+ dmalen++;
+ }
+ return dmalen;
+}
+
+static int d40_sg_2_dmalen(struct scatterlist *sgl, int sg_len,
+ u32 data_width1, u32 data_width2)
+{
+ struct scatterlist *sg;
+ int i;
+ int len = 0;
+ int ret;
+
+ for_each_sg(sgl, sg, sg_len, i) {
+ ret = d40_size_2_dmalen(sg_dma_len(sg),
+ data_width1, data_width2);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ }
+ return len;
+}
+/* Support functions for logical channels */
static int d40_channel_execute_command(struct d40_chan *d40c,
enum d40_command command)
res = -EINVAL;
}
+ if (d40_psize_2_burst_size(is_log, conf->src_info.psize) *
+ (1 << conf->src_info.data_width) !=
+ d40_psize_2_burst_size(is_log, conf->dst_info.psize) *
+ (1 << conf->dst_info.data_width)) {
+ /*
+ * The DMAC hardware only supports
+ * src (burst x width) == dst (burst x width)
+ */
+
+ dev_err(&d40c->chan.dev->device,
+ "[%s] src (burst x width) != dst (burst x width)\n",
+ __func__);
+ res = -EINVAL;
+ }
+
return res;
}
if (d40d == NULL)
goto err;
- d40d->lli_len = sgl_len;
+ d40d->lli_len = d40_sg_2_dmalen(sgl_dst, sgl_len,
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width);
+ if (d40d->lli_len < 0) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Unaligned size\n", __func__);
+ goto err;
+ }
+
d40d->lli_current = 0;
d40d->txd.flags = dma_flags;
if (d40c->log_num != D40_PHY_CHAN) {
- if (d40_pool_lli_alloc(d40d, sgl_len, true) < 0) {
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
goto err;
sgl_len,
d40d->lli_log.src,
d40c->log_def.lcsp1,
- d40c->dma_cfg.src_info.data_width);
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width);
(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);
+ d40c->dma_cfg.dst_info.data_width,
+ d40c->dma_cfg.src_info.data_width);
} else {
- if (d40_pool_lli_alloc(d40d, sgl_len, false) < 0) {
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, false) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
goto err;
virt_to_phys(d40d->lli_phy.src),
d40c->src_def_cfg,
d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.psize);
if (res < 0)
virt_to_phys(d40d->lli_phy.dst),
d40c->dst_def_cfg,
d40c->dma_cfg.dst_info.data_width,
+ d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.psize);
if (res < 0)
struct d40_chan *d40c = container_of(chan, struct d40_chan,
chan);
unsigned long flags;
- int err = 0;
if (d40c->phy_chan == NULL) {
dev_err(&d40c->chan.dev->device,
}
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) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Unaligned size\n", __func__);
+ goto err;
+ }
+
dma_async_tx_descriptor_init(&d40d->txd, chan);
if (d40c->log_num != D40_PHY_CHAN) {
- if (d40_pool_lli_alloc(d40d, 1, true) < 0) {
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
goto err;
}
- d40d->lli_len = 1;
d40d->lli_current = 0;
- d40_log_fill_lli(d40d->lli_log.src,
- src,
- size,
- d40c->log_def.lcsp1,
- d40c->dma_cfg.src_info.data_width,
- true);
+ 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;
- d40_log_fill_lli(d40d->lli_log.dst,
- dst,
- size,
- d40c->log_def.lcsp3,
- d40c->dma_cfg.dst_info.data_width,
- true);
+ 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(d40d, 1, false) < 0) {
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, false) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
goto err;
}
- err = d40_phy_fill_lli(d40d->lli_phy.src,
+ if (d40_phy_buf_to_lli(d40d->lli_phy.src,
src,
size,
d40c->dma_cfg.src_info.psize,
d40c->src_def_cfg,
true,
d40c->dma_cfg.src_info.data_width,
- false);
- if (err)
- goto err_fill_lli;
+ d40c->dma_cfg.dst_info.data_width,
+ false) == NULL)
+ goto err;
- err = d40_phy_fill_lli(d40d->lli_phy.dst,
+ if (d40_phy_buf_to_lli(d40d->lli_phy.dst,
dst,
size,
d40c->dma_cfg.dst_info.psize,
d40c->dst_def_cfg,
true,
d40c->dma_cfg.dst_info.data_width,
- false);
-
- if (err)
- goto err_fill_lli;
+ d40c->dma_cfg.src_info.data_width,
+ false) == NULL)
+ goto err;
(void) dma_map_single(d40c->base->dev, d40d->lli_phy.src,
d40d->lli_pool.size, DMA_TO_DEVICE);
spin_unlock_irqrestore(&d40c->lock, flags);
return &d40d->txd;
-err_fill_lli:
- dev_err(&d40c->chan.dev->device,
- "[%s] Failed filling in PHY LLI\n", __func__);
err:
if (d40d)
d40_desc_free(d40c, d40d);
dma_addr_t dev_addr = 0;
int total_size;
- if (d40_pool_lli_alloc(d40d, sg_len, true) < 0) {
+ d40d->lli_len = d40_sg_2_dmalen(sgl, sg_len,
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width);
+ if (d40d->lli_len < 0) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Unaligned size\n", __func__);
+ return -EINVAL;
+ }
+
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, true) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
return -ENOMEM;
}
- d40d->lli_len = sg_len;
d40d->lli_current = 0;
if (direction == DMA_FROM_DEVICE)
dma_addr_t dst_dev_addr;
int res;
- if (d40_pool_lli_alloc(d40d, sgl_len, false) < 0) {
+ d40d->lli_len = d40_sg_2_dmalen(sgl, sgl_len,
+ d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width);
+ if (d40d->lli_len < 0) {
+ dev_err(&d40c->chan.dev->device,
+ "[%s] Unaligned size\n", __func__);
+ return -EINVAL;
+ }
+
+ if (d40_pool_lli_alloc(d40d, d40d->lli_len, false) < 0) {
dev_err(&d40c->chan.dev->device,
"[%s] Out of memory\n", __func__);
return -ENOMEM;
}
- d40d->lli_len = sgl_len;
d40d->lli_current = 0;
if (direction == DMA_FROM_DEVICE) {
virt_to_phys(d40d->lli_phy.src),
d40c->src_def_cfg,
d40c->dma_cfg.src_info.data_width,
+ d40c->dma_cfg.dst_info.data_width,
d40c->dma_cfg.src_info.psize);
if (res < 0)
return res;
virt_to_phys(d40d->lli_phy.dst),
d40c->dst_def_cfg,
d40c->dma_cfg.dst_info.data_width,
+ d40c->dma_cfg.src_info.data_width,
d40c->dma_cfg.dst_info.psize);
if (res < 0)
return res;
psize = STEDMA40_PSIZE_PHY_8;
else if (config_maxburst >= 4)
psize = STEDMA40_PSIZE_PHY_4;
+ else if (config_maxburst >= 2)
+ psize = STEDMA40_PSIZE_PHY_2;
else
psize = STEDMA40_PSIZE_PHY_1;
}
/*
* Copyright (C) ST-Ericsson SA 2007-2010
- * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson
+ * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
* Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
*/
*dst_cfg = dst;
}
-int d40_phy_fill_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_width,
- bool is_device)
+static int d40_phy_fill_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_width,
+ bool is_device)
{
int num_elems;
else
num_elems = 2 << psize;
- /*
- * Size is 16bit. data_width is 8, 16, 32 or 64 bit
- * Block large than 64 KiB must be split.
- */
- if (data_size > (0xffff << data_width))
- return -EINVAL;
-
/* Must be aligned */
if (!IS_ALIGNED(data, 0x1 << data_width))
return -EINVAL;
return 0;
}
+static int d40_seg_size(int size, int data_width1, int data_width2)
+{
+ u32 max_w = max(data_width1, data_width2);
+ u32 min_w = min(data_width1, data_width2);
+ u32 seg_max = ALIGN(STEDMA40_MAX_SEG_SIZE << min_w, 1 << max_w);
+
+ if (seg_max > STEDMA40_MAX_SEG_SIZE)
+ seg_max -= (1 << max_w);
+
+ if (size <= seg_max)
+ return size;
+
+ if (size <= 2 * seg_max)
+ return ALIGN(size / 2, 1 << max_w);
+
+ return seg_max;
+}
+
+struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
+ dma_addr_t addr,
+ u32 size,
+ int psize,
+ dma_addr_t lli_phys,
+ u32 reg_cfg,
+ bool term_int,
+ u32 data_width1,
+ u32 data_width2,
+ bool is_device)
+{
+ int err;
+ dma_addr_t next = lli_phys;
+ int size_rest = size;
+ int size_seg = 0;
+
+ do {
+ size_seg = d40_seg_size(size_rest, data_width1, data_width2);
+ size_rest -= size_seg;
+
+ if (term_int && size_rest == 0)
+ next = 0;
+ else
+ next = ALIGN(next + sizeof(struct d40_phy_lli),
+ D40_LLI_ALIGN);
+
+ err = d40_phy_fill_lli(lli,
+ addr,
+ size_seg,
+ psize,
+ next,
+ reg_cfg,
+ !next,
+ data_width1,
+ is_device);
+
+ if (err)
+ goto err;
+
+ lli++;
+ if (!is_device)
+ addr += size_seg;
+ } while (size_rest);
+
+ return lli;
+
+ err:
+ return NULL;
+}
+
int d40_phy_sg_to_lli(struct scatterlist *sg,
int sg_len,
dma_addr_t target,
- struct d40_phy_lli *lli,
+ struct d40_phy_lli *lli_sg,
dma_addr_t lli_phys,
u32 reg_cfg,
- u32 data_width,
+ u32 data_width1,
+ u32 data_width2,
int psize)
{
int total_size = 0;
int i;
struct scatterlist *current_sg = sg;
- dma_addr_t next_lli_phys;
dma_addr_t dst;
- int err = 0;
+ struct d40_phy_lli *lli = lli_sg;
+ dma_addr_t l_phys = lli_phys;
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, no next link */
- if (sg_len - 1 == i)
- next_lli_phys = 0;
- else
- next_lli_phys = ALIGN(lli_phys + (i + 1) *
- sizeof(struct d40_phy_lli),
- D40_LLI_ALIGN);
-
if (target)
dst = target;
else
dst = sg_phys(current_sg);
- err = d40_phy_fill_lli(&lli[i],
- dst,
- sg_dma_len(current_sg),
- psize,
- next_lli_phys,
- reg_cfg,
- !next_lli_phys,
- data_width,
- target == dst);
- if (err)
- goto err;
+ 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),
+ psize,
+ l_phys,
+ reg_cfg,
+ sg_len - 1 == i,
+ data_width1,
+ data_width2,
+ target == dst);
+ if (lli == NULL)
+ return -EINVAL;
}
return total_size;
-err:
- return err;
}
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 reg_cfg,
- u32 data_width,
- bool addr_inc)
+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)
{
lli->lcsp13 = reg_cfg;
/* The number of elements to transfer */
lli->lcsp02 = ((data_size >> data_width) <<
D40_MEM_LCSP0_ECNT_POS) & D40_MEM_LCSP0_ECNT_MASK;
+
+ BUG_ON((data_size >> data_width) > STEDMA40_MAX_SEG_SIZE);
+
/* 16 LSBs address of the current element */
lli->lcsp02 |= data & D40_MEM_LCSP0_SPTR_MASK;
/* 16 MSBs address of the current element */
int total_size = 0;
struct scatterlist *current_sg = sg;
int i;
+ struct d40_log_lli *lli_src = lli->src;
+ struct d40_log_lli *lli_dst = lli->dst;
for_each_sg(sg, current_sg, sg_len, i) {
total_size += sg_dma_len(current_sg);
if (direction == DMA_TO_DEVICE) {
- d40_log_fill_lli(&lli->src[i],
- sg_phys(current_sg),
- sg_dma_len(current_sg),
- lcsp->lcsp1, src_data_width,
- true);
- d40_log_fill_lli(&lli->dst[i],
- dev_addr,
- sg_dma_len(current_sg),
- lcsp->lcsp3, dst_data_width,
- false);
+ lli_src =
+ d40_log_buf_to_lli(lli_src,
+ sg_phys(current_sg),
+ sg_dma_len(current_sg),
+ lcsp->lcsp1, src_data_width,
+ dst_data_width,
+ true);
+ lli_dst =
+ d40_log_buf_to_lli(lli_dst,
+ dev_addr,
+ sg_dma_len(current_sg),
+ lcsp->lcsp3, dst_data_width,
+ src_data_width,
+ false);
} else {
- d40_log_fill_lli(&lli->dst[i],
- sg_phys(current_sg),
- sg_dma_len(current_sg),
- lcsp->lcsp3, dst_data_width,
- true);
- d40_log_fill_lli(&lli->src[i],
- dev_addr,
- sg_dma_len(current_sg),
- lcsp->lcsp1, src_data_width,
- false);
+ lli_dst =
+ d40_log_buf_to_lli(lli_dst,
+ sg_phys(current_sg),
+ sg_dma_len(current_sg),
+ lcsp->lcsp3, dst_data_width,
+ src_data_width,
+ true);
+ lli_src =
+ d40_log_buf_to_lli(lli_src,
+ dev_addr,
+ sg_dma_len(current_sg),
+ lcsp->lcsp1, src_data_width,
+ dst_data_width,
+ false);
}
}
return total_size;
}
+struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
+ dma_addr_t addr,
+ int size,
+ u32 lcsp13, /* src or dst*/
+ u32 data_width1,
+ u32 data_width2,
+ bool addr_inc)
+{
+ struct d40_log_lli *lli = lli_sg;
+ int size_rest = size;
+ int size_seg = 0;
+
+ do {
+ size_seg = d40_seg_size(size_rest, data_width1, data_width2);
+ size_rest -= size_seg;
+
+ d40_log_fill_lli(lli,
+ addr,
+ size_seg,
+ lcsp13, data_width1,
+ addr_inc);
+ if (addr_inc)
+ addr += size_seg;
+ lli++;
+ } while (size_rest);
+
+ return lli;
+}
+
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)
+ u32 data_width1, u32 data_width2)
{
int total_size = 0;
struct scatterlist *current_sg = sg;
int i;
+ struct d40_log_lli *lli = lli_sg;
for_each_sg(sg, current_sg, sg_len, i) {
total_size += sg_dma_len(current_sg);
-
- d40_log_fill_lli(&lli_sg[i],
- sg_phys(current_sg),
- sg_dma_len(current_sg),
- lcsp13, data_width,
- true);
+ lli = d40_log_buf_to_lli(lli,
+ sg_phys(current_sg),
+ sg_dma_len(current_sg),
+ lcsp13,
+ data_width1, data_width2, true);
}
return total_size;
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff