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Code Issues Releases Wiki Activity

async_tx: replace 'int_en' with operation preparation flags

Browse Source 
Pass a full set of flags to drivers' per-operation 'prep' routines.
Currently the only flag passed is DMA_PREP_INTERRUPT.  The expectation is
that arch-specific async_tx_find_channel() implementations can exploit this
capability to find the best channel for an operation.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Reviewed-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
This commit is contained in:
Dan Williams 2008-02-02 19:49:58 -07:00
parent 0036731c88
commit d4c56f97ff
8 changed files with 62 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
crypto/async_tx/async_memcpy.c
View File

@ -52,6 +52,7 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
if (device) {
dma_addr_t dma_dest, dma_src;
unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
dma_dest = dma_map_page(device->dev, dest, dest_offset, len,
DMA_FROM_DEVICE);
@ -60,7 +61,7 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
DMA_TO_DEVICE);
tx = device->device_prep_dma_memcpy(chan, dma_dest, dma_src,
len, cb_fn != NULL);
len, dma_prep_flags);
}
if (tx) {

3
crypto/async_tx/async_memset.c
View File

@ -52,12 +52,13 @@ async_memset(struct page *dest, int val, unsigned int offset,
if (device) {
dma_addr_t dma_dest;
unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
dma_dest = dma_map_page(device->dev, dest, offset, len,
DMA_FROM_DEVICE);
tx = device->device_prep_dma_memset(chan, dma_dest, val, len,
cb_fn != NULL);
dma_prep_flags);
}
if (tx) {

10
crypto/async_tx/async_xor.c
View File

@ -45,6 +45,7 @@ do_async_xor(struct dma_device *device,
dma_addr_t *dma_src = (dma_addr_t *) src_list;
struct dma_async_tx_descriptor *tx;
int i;
unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
pr_debug("%s: len: %zu\n", __FUNCTION__, len);
@ -60,7 +61,7 @@ do_async_xor(struct dma_device *device,
* in case they can not provide a descriptor
*/
tx = device->device_prep_dma_xor(chan, dma_dest, dma_src, src_cnt, len,
cb_fn != NULL);
dma_prep_flags);
if (!tx) {
if (depend_tx)
dma_wait_for_async_tx(depend_tx);
@ -68,7 +69,7 @@ do_async_xor(struct dma_device *device,
while (!tx)
tx = device->device_prep_dma_xor(chan, dma_dest,
dma_src, src_cnt, len,
cb_fn != NULL);
dma_prep_flags);
}
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);
@ -268,6 +269,7 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
if (device) {
dma_addr_t *dma_src = (dma_addr_t *) src_list;
unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
int i;
pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
@ -278,7 +280,7 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
tx = device->device_prep_dma_zero_sum(chan, dma_src, src_cnt,
len, result,
cb_fn != NULL);
dma_prep_flags);
if (!tx) {
if (depend_tx)
dma_wait_for_async_tx(depend_tx);
@ -286,7 +288,7 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
while (!tx)
tx = device->device_prep_dma_zero_sum(chan,
dma_src, src_cnt, len, result,
cb_fn != NULL);
dma_prep_flags);
}
async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);

4
drivers/dma/ioat_dma.c
View File

@ -701,7 +701,7 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy(
dma_addr_t dma_dest,
dma_addr_t dma_src,
size_t len,
int int_en)
unsigned long flags)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
struct ioat_desc_sw *new;
@ -724,7 +724,7 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
dma_addr_t dma_dest,
dma_addr_t dma_src,
size_t len,
int int_en)
unsigned long flags)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
struct ioat_desc_sw *new;

20
drivers/dma/iop-adma.c
View File

@ -537,7 +537,7 @@ iop_adma_prep_dma_interrupt(struct dma_chan *chan)
static struct dma_async_tx_descriptor *
iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
dma_addr_t dma_src, size_t len, int int_en)
dma_addr_t dma_src, 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;
@ -555,7 +555,7 @@ iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
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_memcpy(grp_start, int_en);
iop_desc_init_memcpy(grp_start, flags);
iop_desc_set_byte_count(grp_start, iop_chan, len);
iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
iop_desc_set_memcpy_src_addr(grp_start, dma_src);
@ -569,7 +569,7 @@ iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
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, int int_en)
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;
@ -587,7 +587,7 @@ iop_adma_prep_dma_memset(struct dma_chan *chan, dma_addr_t dma_dest,
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, int_en);
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);
@ -602,7 +602,7 @@ iop_adma_prep_dma_memset(struct dma_chan *chan, dma_addr_t dma_dest,
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,
int int_en)
unsigned long flags)
{
struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
struct iop_adma_desc_slot *sw_desc, *grp_start;
@ -613,15 +613,15 @@ iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest,
BUG_ON(unlikely(len > IOP_ADMA_XOR_MAX_BYTE_COUNT));
dev_dbg(iop_chan->device->common.dev,
"%s src_cnt: %d len: %u int_en: %d\n",
__FUNCTION__, src_cnt, len, int_en);
"%s src_cnt: %d len: %u flags: %lx\n",
__FUNCTION__, src_cnt, len, flags);
spin_lock_bh(&iop_chan->lock);
slot_cnt = iop_chan_xor_slot_count(len, src_cnt, &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_xor(grp_start, src_cnt, int_en);
iop_desc_init_xor(grp_start, src_cnt, flags);
iop_desc_set_byte_count(grp_start, iop_chan, len);
iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
sw_desc->unmap_src_cnt = src_cnt;
@ -638,7 +638,7 @@ iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest,
static struct dma_async_tx_descriptor *
iop_adma_prep_dma_zero_sum(struct dma_chan *chan, dma_addr_t *dma_src,
unsigned int src_cnt, size_t len, u32 *result,
int int_en)
unsigned long flags)
{
struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
struct iop_adma_desc_slot *sw_desc, *grp_start;
@ -655,7 +655,7 @@ iop_adma_prep_dma_zero_sum(struct dma_chan *chan, dma_addr_t *dma_src,
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_zero_sum(grp_start, src_cnt, int_en);
iop_desc_init_zero_sum(grp_start, src_cnt, flags);
iop_desc_set_zero_sum_byte_count(grp_start, len);
grp_start->xor_check_result = result;
pr_debug("\t%s: grp_start->xor_check_result: %p\n",

18
include/asm-arm/arch-iop13xx/adma.h
View File

@ -247,7 +247,7 @@ static inline u32 iop_desc_get_src_count(struct iop_adma_desc_slot *desc,
}
static inline void
iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, int int_en)
iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
{
struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
union {
@ -257,13 +257,13 @@ iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, int int_en)
u_desc_ctrl.value = 0;
u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
hw_desc->crc_addr = 0;
}
static inline void
iop_desc_init_memset(struct iop_adma_desc_slot *desc, int int_en)
iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
{
struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
union {
@ -274,14 +274,15 @@ iop_desc_init_memset(struct iop_adma_desc_slot *desc, int int_en)
u_desc_ctrl.value = 0;
u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
u_desc_ctrl.field.block_fill_en = 1;
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
hw_desc->crc_addr = 0;
}
/* to do: support buffers larger than ADMA_MAX_BYTE_COUNT */
static inline void
iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
unsigned long flags)
{
struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
union {
@ -292,7 +293,7 @@ iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
u_desc_ctrl.value = 0;
u_desc_ctrl.field.src_select = src_cnt - 1;
u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
hw_desc->crc_addr = 0;
@ -301,7 +302,8 @@ iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
/* to do: support buffers larger than ADMA_MAX_BYTE_COUNT */
static inline int
iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
unsigned long flags)
{
struct iop13xx_adma_desc_hw *hw_desc = desc->hw_desc;
union {
@ -314,7 +316,7 @@ iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
u_desc_ctrl.field.xfer_dir = 3; /* local to internal bus */
u_desc_ctrl.field.zero_result = 1;
u_desc_ctrl.field.status_write_back_en = 1;
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
hw_desc->crc_addr = 0;

30
include/asm-arm/hardware/iop3xx-adma.h
View File

@ -414,7 +414,7 @@ static inline void iop3xx_aau_desc_set_src_addr(struct iop3xx_desc_aau *hw_desc,
}
static inline void
iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, int int_en)
iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
{
struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
union {
@ -425,14 +425,14 @@ iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, int int_en)
u_desc_ctrl.value = 0;
u_desc_ctrl.field.mem_to_mem_en = 1;
u_desc_ctrl.field.pci_transaction = 0xe; /* memory read block */
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
hw_desc->upper_pci_src_addr = 0;
hw_desc->crc_addr = 0;
}
static inline void
iop_desc_init_memset(struct iop_adma_desc_slot *desc, int int_en)
iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
{
struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
union {
@ -443,12 +443,13 @@ iop_desc_init_memset(struct iop_adma_desc_slot *desc, int int_en)
u_desc_ctrl.value = 0;
u_desc_ctrl.field.blk1_cmd_ctrl = 0x2; /* memory block fill */
u_desc_ctrl.field.dest_write_en = 1;
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
}
static inline u32
iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt, int int_en)
iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
unsigned long flags)
{
int i, shift;
u32 edcr;
@ -509,21 +510,23 @@ iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt, int int_en)
u_desc_ctrl.field.dest_write_en = 1;
u_desc_ctrl.field.blk1_cmd_ctrl = 0x7; /* direct fill */
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
return u_desc_ctrl.value;
}
static inline void
iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
unsigned long flags)
{
iop3xx_desc_init_xor(desc->hw_desc, src_cnt, int_en);
iop3xx_desc_init_xor(desc->hw_desc, src_cnt, flags);
}
/* return the number of operations */
static inline int
iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
unsigned long flags)
{
int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
struct iop3xx_desc_aau *hw_desc, *prev_hw_desc, *iter;
@ -538,10 +541,10 @@ iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
for (i = 0, j = 0; (slot_cnt -= slots_per_op) >= 0;
i += slots_per_op, j++) {
iter = iop_hw_desc_slot_idx(hw_desc, i);
u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, int_en);
u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, flags);
u_desc_ctrl.field.dest_write_en = 0;
u_desc_ctrl.field.zero_result_en = 1;
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
iter->desc_ctrl = u_desc_ctrl.value;
/* for the subsequent descriptors preserve the store queue
@ -559,7 +562,8 @@ iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
}
static inline void
iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt,
unsigned long flags)
{
struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
union {
@ -591,7 +595,7 @@ iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt, int int_en)
}
u_desc_ctrl.field.dest_write_en = 0;
u_desc_ctrl.field.int_en = int_en;
u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
hw_desc->desc_ctrl = u_desc_ctrl.value;
}

17
include/linux/dmaengine.h
View File

@ -94,6 +94,15 @@ enum dma_transaction_type {
/* last transaction type for creation of the capabilities mask */
#define DMA_TX_TYPE_END (DMA_INTERRUPT + 1)
/**
* enum dma_prep_flags - DMA flags to augment operation preparation
* @DMA_PREP_INTERRUPT - trigger an interrupt (callback) upon completion of
* this transaction
*/
enum dma_prep_flags {
DMA_PREP_INTERRUPT = (1 << 0),
};
/**
* dma_cap_mask_t - capabilities bitmap modeled after cpumask_t.
* See linux/cpumask.h
@ -274,16 +283,16 @@ struct dma_device {
struct dma_async_tx_descriptor *(*device_prep_dma_memcpy)(
struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
size_t len, int int_en);
size_t len, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_xor)(
struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
unsigned int src_cnt, size_t len, int int_en);
unsigned int src_cnt, size_t len, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_zero_sum)(
struct dma_chan *chan, dma_addr_t *src, unsigned int src_cnt,
size_t len, u32 *result, int int_en);
size_t len, u32 *result, unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_memset)(
struct dma_chan *chan, dma_addr_t dest, int value, size_t len,
int int_en);
unsigned long flags);
struct dma_async_tx_descriptor *(*device_prep_dma_interrupt)(
struct dma_chan *chan);