Commit 48a9db46 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Linus Torvalds
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drivers/dma: remove unused support for MEMSET operations

There have never been any real users of MEMSET operations since they
have been introduced in January 2007 by commit 7405f74b

 ("dmaengine:
refactor dmaengine around dma_async_tx_descriptor").  Therefore remove
support for them for now, it can be always brought back when needed.

[sebastian.hesselbarth@gmail.com: fix drivers/dma/mv_xor]
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Acked-by: default avatarDan Williams <djbw@fb.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Olof Johansson <olof@lixom.net>
Cc: Kevin Hilman <khilman@linaro.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent dcf6d294
......@@ -222,5 +222,4 @@ drivers/dma/: location for offload engine drivers
include/linux/async_tx.h: core header file for the async_tx api
crypto/async_tx/async_tx.c: async_tx interface to dmaengine and common code
crypto/async_tx/async_memcpy.c: copy offload
crypto/async_tx/async_memset.c: memory fill offload
crypto/async_tx/async_xor.c: xor and xor zero sum offload
......@@ -469,7 +469,6 @@ void __init iop13xx_platform_init(void)
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
break;
case IOP13XX_INIT_ADMA_1:
......@@ -479,7 +478,6 @@ void __init iop13xx_platform_init(void)
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
break;
case IOP13XX_INIT_ADMA_2:
......@@ -489,7 +487,6 @@ void __init iop13xx_platform_init(void)
dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
dma_cap_set(DMA_XOR, plat_data->cap_mask);
dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
dma_cap_set(DMA_PQ, plat_data->cap_mask);
dma_cap_set(DMA_PQ_VAL, plat_data->cap_mask);
......
......@@ -192,12 +192,10 @@ static int __init iop3xx_adma_cap_init(void)
#ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#else
dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_XOR_VAL, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
#endif
......
......@@ -666,14 +666,9 @@ void __init orion_xor0_init(unsigned long mapbase_low,
orion_xor0_shared_resources[3].start = irq_1;
orion_xor0_shared_resources[3].end = irq_1;
/*
* two engines can't do memset simultaneously, this limitation
* satisfied by removing memset support from one of the engines.
*/
dma_cap_set(DMA_MEMCPY, orion_xor0_channels_data[0].cap_mask);
dma_cap_set(DMA_XOR, orion_xor0_channels_data[0].cap_mask);
dma_cap_set(DMA_MEMSET, orion_xor0_channels_data[1].cap_mask);
dma_cap_set(DMA_MEMCPY, orion_xor0_channels_data[1].cap_mask);
dma_cap_set(DMA_XOR, orion_xor0_channels_data[1].cap_mask);
......@@ -732,14 +727,9 @@ void __init orion_xor1_init(unsigned long mapbase_low,
orion_xor1_shared_resources[3].start = irq_1;
orion_xor1_shared_resources[3].end = irq_1;
/*
* two engines can't do memset simultaneously, this limitation
* satisfied by removing memset support from one of the engines.
*/
dma_cap_set(DMA_MEMCPY, orion_xor1_channels_data[0].cap_mask);
dma_cap_set(DMA_XOR, orion_xor1_channels_data[0].cap_mask);
dma_cap_set(DMA_MEMSET, orion_xor1_channels_data[1].cap_mask);
dma_cap_set(DMA_MEMCPY, orion_xor1_channels_data[1].cap_mask);
dma_cap_set(DMA_XOR, orion_xor1_channels_data[1].cap_mask);
......
......@@ -10,10 +10,6 @@ config ASYNC_XOR
select ASYNC_CORE
select XOR_BLOCKS
config ASYNC_MEMSET
tristate
select ASYNC_CORE
config ASYNC_PQ
tristate
select ASYNC_CORE
......
obj-$(CONFIG_ASYNC_CORE) += async_tx.o
obj-$(CONFIG_ASYNC_MEMCPY) += async_memcpy.o
obj-$(CONFIG_ASYNC_MEMSET) += async_memset.o
obj-$(CONFIG_ASYNC_XOR) += async_xor.o
obj-$(CONFIG_ASYNC_PQ) += async_pq.o
obj-$(CONFIG_ASYNC_RAID6_RECOV) += async_raid6_recov.o
......
/*
* memory fill offload engine support
*
* Copyright © 2006, Intel Corporation.
*
* Dan Williams <dan.j.williams@intel.com>
*
* with architecture considerations by:
* Neil Brown <neilb@suse.de>
* Jeff Garzik <jeff@garzik.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/async_tx.h>
/**
* async_memset - attempt to fill memory with a dma engine.
* @dest: destination page
* @val: fill value
* @offset: offset in pages to start transaction
* @len: length in bytes
*
* honored flags: ASYNC_TX_ACK
*/
struct dma_async_tx_descriptor *
async_memset(struct page *dest, int val, unsigned int offset, size_t len,
struct async_submit_ctl *submit)
{
struct dma_chan *chan = async_tx_find_channel(submit, DMA_MEMSET,
&dest, 1, NULL, 0, len);
struct dma_device *device = chan ? chan->device : NULL;
struct dma_async_tx_descriptor *tx = NULL;
if (device && is_dma_fill_aligned(device, offset, 0, len)) {
dma_addr_t dma_dest;
unsigned long dma_prep_flags = 0;
if (submit->cb_fn)
dma_prep_flags |= DMA_PREP_INTERRUPT;
if (submit->flags & ASYNC_TX_FENCE)
dma_prep_flags |= DMA_PREP_FENCE;
dma_dest = dma_map_page(device->dev, dest, offset, len,
DMA_FROM_DEVICE);
tx = device->device_prep_dma_memset(chan, dma_dest, val, len,
dma_prep_flags);
}
if (tx) {
pr_debug("%s: (async) len: %zu\n", __func__, len);
async_tx_submit(chan, tx, submit);
} else { /* run the memset synchronously */
void *dest_buf;
pr_debug("%s: (sync) len: %zu\n", __func__, len);
dest_buf = page_address(dest) + offset;
/* wait for any prerequisite operations */
async_tx_quiesce(&submit->depend_tx);
memset(dest_buf, val, len);
async_tx_sync_epilog(submit);
}
return tx;
}
EXPORT_SYMBOL_GPL(async_memset);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("asynchronous memset api");
MODULE_LICENSE("GPL");
......@@ -663,11 +663,6 @@ static bool device_has_all_tx_types(struct dma_device *device)
return false;
#endif
#if defined(CONFIG_ASYNC_MEMSET) || defined(CONFIG_ASYNC_MEMSET_MODULE)
if (!dma_has_cap(DMA_MEMSET, device->cap_mask))
return false;
#endif
#if defined(CONFIG_ASYNC_XOR) || defined(CONFIG_ASYNC_XOR_MODULE)
if (!dma_has_cap(DMA_XOR, device->cap_mask))
return false;
......@@ -729,8 +724,6 @@ int dma_async_device_register(struct dma_device *device)
!device->device_prep_dma_pq);
BUG_ON(dma_has_cap(DMA_PQ_VAL, device->cap_mask) &&
!device->device_prep_dma_pq_val);
BUG_ON(dma_has_cap(DMA_MEMSET, device->cap_mask) &&
!device->device_prep_dma_memset);
BUG_ON(dma_has_cap(DMA_INTERRUPT, device->cap_mask) &&
!device->device_prep_dma_interrupt);
BUG_ON(dma_has_cap(DMA_SG, device->cap_mask) &&
......
......@@ -1105,12 +1105,11 @@ static ssize_t cap_show(struct dma_chan *c, char *page)
{
struct dma_device *dma = c->device;
return sprintf(page, "copy%s%s%s%s%s%s\n",
return sprintf(page, "copy%s%s%s%s%s\n",
dma_has_cap(DMA_PQ, dma->cap_mask) ? " pq" : "",
dma_has_cap(DMA_PQ_VAL, dma->cap_mask) ? " pq_val" : "",
dma_has_cap(DMA_XOR, dma->cap_mask) ? " xor" : "",
dma_has_cap(DMA_XOR_VAL, dma->cap_mask) ? " xor_val" : "",
dma_has_cap(DMA_MEMSET, dma->cap_mask) ? " fill" : "",
dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
}
......
......@@ -123,7 +123,6 @@ static inline u16 ioat2_xferlen_to_descs(struct ioat2_dma_chan *ioat, size_t len
struct ioat_ring_ent {
union {
struct ioat_dma_descriptor *hw;
struct ioat_fill_descriptor *fill;
struct ioat_xor_descriptor *xor;
struct ioat_xor_ext_descriptor *xor_ex;
struct ioat_pq_descriptor *pq;
......
......@@ -311,14 +311,6 @@ static void ioat3_dma_unmap(struct ioat2_dma_chan *ioat,
if (!desc->hw->ctl_f.null) /* skip 'interrupt' ops */
ioat_dma_unmap(chan, flags, len, desc->hw);
break;
case IOAT_OP_FILL: {
struct ioat_fill_descriptor *hw = desc->fill;
if (!(flags & DMA_COMPL_SKIP_DEST_UNMAP))
ioat_unmap(pdev, hw->dst_addr - offset, len,
PCI_DMA_FROMDEVICE, flags, 1);
break;
}
case IOAT_OP_XOR_VAL:
case IOAT_OP_XOR: {
struct ioat_xor_descriptor *xor = desc->xor;
......@@ -823,51 +815,6 @@ ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
return dma_cookie_status(c, cookie, txstate);
}
static struct dma_async_tx_descriptor *
ioat3_prep_memset_lock(struct dma_chan *c, dma_addr_t dest, int value,
size_t len, unsigned long flags)
{
struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
struct ioat_ring_ent *desc;
size_t total_len = len;
struct ioat_fill_descriptor *fill;
u64 src_data = (0x0101010101010101ULL) * (value & 0xff);
int num_descs, idx, i;
num_descs = ioat2_xferlen_to_descs(ioat, len);
if (likely(num_descs) && ioat2_check_space_lock(ioat, num_descs) == 0)
idx = ioat->head;
else
return NULL;
i = 0;
do {
size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
desc = ioat2_get_ring_ent(ioat, idx + i);
fill = desc->fill;
fill->size = xfer_size;
fill->src_data = src_data;
fill->dst_addr = dest;
fill->ctl = 0;
fill->ctl_f.op = IOAT_OP_FILL;
len -= xfer_size;
dest += xfer_size;
dump_desc_dbg(ioat, desc);
} while (++i < num_descs);
desc->txd.flags = flags;
desc->len = total_len;
fill->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT);
fill->ctl_f.fence = !!(flags & DMA_PREP_FENCE);
fill->ctl_f.compl_write = 1;
dump_desc_dbg(ioat, desc);
/* we leave the channel locked to ensure in order submission */
return &desc->txd;
}
static struct dma_async_tx_descriptor *
__ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt,
......@@ -1431,7 +1378,7 @@ static int ioat_xor_val_self_test(struct ioatdma_device *device)
struct page *xor_srcs[IOAT_NUM_SRC_TEST];
struct page *xor_val_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dma_srcs[IOAT_NUM_SRC_TEST + 1];
dma_addr_t dma_addr, dest_dma;
dma_addr_t dest_dma;
struct dma_async_tx_descriptor *tx;
struct dma_chan *dma_chan;
dma_cookie_t cookie;
......@@ -1598,56 +1545,6 @@ static int ioat_xor_val_self_test(struct ioatdma_device *device)
goto free_resources;
}
/* skip memset if the capability is not present */
if (!dma_has_cap(DMA_MEMSET, dma_chan->device->cap_mask))
goto free_resources;
/* test memset */
op = IOAT_OP_FILL;
dma_addr = dma_map_page(dev, dest, 0,
PAGE_SIZE, DMA_FROM_DEVICE);
tx = dma->device_prep_dma_memset(dma_chan, dma_addr, 0, PAGE_SIZE,
DMA_PREP_INTERRUPT |
DMA_COMPL_SKIP_SRC_UNMAP |
DMA_COMPL_SKIP_DEST_UNMAP);
if (!tx) {
dev_err(dev, "Self-test memset prep failed\n");
err = -ENODEV;
goto dma_unmap;
}
async_tx_ack(tx);
init_completion(&cmp);
tx->callback = ioat3_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
dev_err(dev, "Self-test memset setup failed\n");
err = -ENODEV;
goto dma_unmap;
}
dma->device_issue_pending(dma_chan);
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
if (dma->device_tx_status(dma_chan, cookie, NULL) != DMA_SUCCESS) {
dev_err(dev, "Self-test memset timed out\n");
err = -ENODEV;
goto dma_unmap;
}
dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE);
for (i = 0; i < PAGE_SIZE/sizeof(u32); i++) {
u32 *ptr = page_address(dest);
if (ptr[i]) {
dev_err(dev, "Self-test memset failed compare\n");
err = -ENODEV;
goto free_resources;
}
}
/* test for non-zero parity sum */
op = IOAT_OP_XOR_VAL;
......@@ -1706,8 +1603,7 @@ dma_unmap:
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
DMA_TO_DEVICE);
} else if (op == IOAT_OP_FILL)
dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE);
}
free_resources:
dma->device_free_chan_resources(dma_chan);
out:
......@@ -1944,12 +1840,6 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca)
}
}
if (is_raid_device && (device->cap & IOAT_CAP_FILL_BLOCK)) {
dma_cap_set(DMA_MEMSET, dma->cap_mask);
dma->device_prep_dma_memset = ioat3_prep_memset_lock;
}
dma->device_tx_status = ioat3_tx_status;
device->cleanup_fn = ioat3_cleanup_event;
device->timer_fn = ioat3_timer_event;
......
......@@ -100,33 +100,6 @@ struct ioat_dma_descriptor {
uint64_t user2;
};
struct ioat_fill_descriptor {
uint32_t size;
union {
uint32_t ctl;
struct {
unsigned int int_en:1;
unsigned int rsvd:1;
unsigned int dest_snoop_dis:1;
unsigned int compl_write:1;
unsigned int fence:1;
unsigned int rsvd2:2;
unsigned int dest_brk:1;
unsigned int bundle:1;
unsigned int rsvd4:15;
#define IOAT_OP_FILL 0x01
unsigned int op:8;
} ctl_f;
};
uint64_t src_data;
uint64_t dst_addr;
uint64_t next;
uint64_t rsv1;
uint64_t next_dst_addr;
uint64_t user1;
uint64_t user2;
};
struct ioat_xor_descriptor {
uint32_t size;
union {
......
......@@ -632,39 +632,6 @@ iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
return sw_desc ? &sw_desc->async_tx : NULL;
}
static struct dma_async_tx_descriptor *
iop_adma_prep_dma_memset(struct dma_chan *chan, dma_addr_t dma_dest,
int value, size_t len, unsigned long flags)
{
struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
struct iop_adma_desc_slot *sw_desc, *grp_start;
int slot_cnt, slots_per_op;
if (unlikely(!len))
return NULL;
BUG_ON(len > IOP_ADMA_MAX_BYTE_COUNT);
dev_dbg(iop_chan->device->common.dev, "%s len: %u\n",
__func__, len);
spin_lock_bh(&iop_chan->lock);
slot_cnt = iop_chan_memset_slot_count(len, &slots_per_op);
sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
if (sw_desc) {
grp_start = sw_desc->group_head;
iop_desc_init_memset(grp_start, flags);
iop_desc_set_byte_count(grp_start, iop_chan, len);
iop_desc_set_block_fill_val(grp_start, value);
iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
sw_desc->unmap_src_cnt = 1;
sw_desc->unmap_len = len;
sw_desc->async_tx.flags = flags;
}
spin_unlock_bh(&iop_chan->lock);
return sw_desc ? &sw_desc->async_tx : NULL;
}
static struct dma_async_tx_descriptor *
iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest,
dma_addr_t *dma_src, unsigned int src_cnt, size_t len,
......@@ -1176,33 +1143,6 @@ iop_adma_xor_val_self_test(struct iop_adma_device *device)
goto free_resources;
}
/* test memset */
dma_addr = dma_map_page(dma_chan->device->dev, dest, 0,
PAGE_SIZE, DMA_FROM_DEVICE);
tx = iop_adma_prep_dma_memset(dma_chan, dma_addr, 0, PAGE_SIZE,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
cookie = iop_adma_tx_submit(tx);
iop_adma_issue_pending(dma_chan);
msleep(8);
if (iop_adma_status(dma_chan, cookie, NULL) != DMA_SUCCESS) {
dev_err(dma_chan->device->dev,
"Self-test memset timed out, disabling\n");
err = -ENODEV;
goto free_resources;
}
for (i = 0; i < PAGE_SIZE/sizeof(u32); i++) {
u32 *ptr = page_address(dest);
if (ptr[i]) {
dev_err(dma_chan->device->dev,
"Self-test memset failed compare, disabling\n");
err = -ENODEV;
goto free_resources;
}
}
/* test for non-zero parity sum */
zero_sum_result = 0;
for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++)
......@@ -1487,8 +1427,6 @@ static int iop_adma_probe(struct platform_device *pdev)
/* set prep routines based on capability */
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask))
dma_dev->device_prep_dma_memcpy = iop_adma_prep_dma_memcpy;
if (dma_has_cap(DMA_MEMSET, dma_dev->cap_mask))
dma_dev->device_prep_dma_memset = iop_adma_prep_dma_memset;
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
dma_dev->max_xor = iop_adma_get_max_xor();
dma_dev->device_prep_dma_xor = iop_adma_prep_dma_xor;
......@@ -1556,8 +1494,7 @@ static int iop_adma_probe(struct platform_device *pdev)
goto err_free_iop_chan;
}
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask) ||
dma_has_cap(DMA_MEMSET, dma_dev->cap_mask)) {
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
ret = iop_adma_xor_val_self_test(adev);
dev_dbg(&pdev->dev, "xor self test returned %d\n", ret);
if (ret)
......@@ -1584,7 +1521,6 @@ static int iop_adma_probe(struct platform_device *pdev)
dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask) ? "pq_val " : "",
dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "",
dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask) ? "xor_val " : "",
dma_has_cap(DMA_MEMSET, dma_dev->cap_mask) ? "fill " : "",
dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
......
......@@ -89,11 +89,6 @@ static void mv_desc_clear_next_desc(struct mv_xor_desc_slot *desc)
hw_desc->phy_next_desc = 0;
}
static void mv_desc_set_block_fill_val(struct mv_xor_desc_slot *desc, u32 val)
{
desc->value = val;
}
static void mv_desc_set_dest_addr(struct mv_xor_desc_slot *desc,
dma_addr_t addr)
{
......@@ -128,22 +123,6 @@ static void mv_chan_set_next_descriptor(struct mv_xor_chan *chan,
__raw_writel(next_desc_addr, XOR_NEXT_DESC(chan));
}
static void mv_chan_set_dest_pointer(struct mv_xor_chan *chan, u32 desc_addr)
{
__raw_writel(desc_addr, XOR_DEST_POINTER(chan));
}
static void mv_chan_set_block_size(struct mv_xor_chan *chan, u32 block_size)
{
__raw_writel(block_size, XOR_BLOCK_SIZE(chan));
}
static void mv_chan_set_value(struct mv_xor_chan *chan, u32 value)
{
__raw_writel(value, XOR_INIT_VALUE_LOW(chan));
__raw_writel(value, XOR_INIT_VALUE_HIGH(chan));
}
static void mv_chan_unmask_interrupts(struct mv_xor_chan *chan)
{
u32 val = __raw_readl(XOR_INTR_MASK(chan));
......@@ -186,8 +165,6 @@ static int mv_can_chain(struct mv_xor_desc_slot *desc)
if (chain_old_tail->type != desc->type)
return 0;
if (desc->type == DMA_MEMSET)
return 0;
return 1;
}
......@@ -205,9 +182,6 @@ static void mv_set_mode(struct mv_xor_chan *chan,
case DMA_MEMCPY:
op_mode = XOR_OPERATION_MODE_MEMCPY;
break;
case DMA_MEMSET:
op_mode = XOR_OPERATION_MODE_MEMSET;
break;
default:
dev_err(mv_chan_to_devp(chan),
"error: unsupported operation %d\n",
......@@ -274,18 +248,9 @@ static void mv_xor_start_new_chain(struct mv_xor_chan *mv_chan,
if (sw_desc->type != mv_chan->current_type)
mv_set_mode(mv_chan, sw_desc->type);
if (sw_desc->type == DMA_MEMSET) {
/* for memset requests we need to program the engine, no
* descriptors used.
*/
struct mv_xor_desc *hw_desc = sw_desc->hw_desc;
mv_chan_set_dest_pointer(mv_chan, hw_desc->phy_dest_addr);
mv_chan_set_block_size(mv_chan, sw_desc->unmap_len);
mv_chan_set_value(mv_chan, sw_desc->value);
} else {
/* set the hardware chain */
mv_chan_set_next_descriptor(mv_chan, sw_desc->async_tx.phys);
}
/* set the hardware chain */
mv_chan_set_next_descriptor(mv_chan, sw_desc->async_tx.phys);
mv_chan->pending += sw_desc->slot_cnt;
mv_xor_issue_pending(&mv_chan->dmachan);
}
......@@ -687,43 +652,6 @@ mv_xor_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
return sw_desc ? &sw_desc->async_tx : NULL;
}
static struct dma_async_tx_descriptor *
mv_xor_prep_dma_memset(struct dma_chan *chan, dma_addr_t dest, int value,
size_t len, unsigned long flags)
{
struct mv_xor_chan *mv_chan = to_mv_xor_chan(chan);
struct mv_xor_desc_slot *sw_desc, *grp_start;
int slot_cnt;
dev_dbg(mv_chan_to_devp(mv_chan),
"%s dest: %x len: %u flags: %ld\n",
__func__, dest, len, flags);
if (unlikely(len < MV_XOR_MIN_BYTE_COUNT))
return NULL;
BUG_ON(len > MV_XOR_MAX_BYTE_COUNT);