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Commit 711924b1 authored by Shannon Nelson's avatar Shannon Nelson Committed by Linus Torvalds
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I/OAT: fixups from code comments 

A few fixups from Andrew's code comments.
  - removed "static inline" forward-declares
  - changed use of min() to min_t()
  - removed some unnecessary NULL initializations
  - removed a couple of BUG() calls

Fixes this:

drivers/dma/ioat_dma.c: In function `ioat1_tx_submit':
drivers/dma/ioat_dma.c:177: sorry, unimplemented: inlining failed in call to '__ioat1_dma_memcpy_issue_pending': function body not available
drivers/dma/ioat_dma.c:268: sorry, unimplemented: called from here
Signed-off-by: default avatarShannon Nelson <shannon.nelson@intel.com>
Cc: "Williams, Dan J" <dan.j.williams@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7c9e70ef
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Inline Side-by-side
Showing with 78 additions and 66 deletions
drivers/dma/ioat_dma.c
View file @ 711924b1
......@@ -173,10 +173,47 @@ static void ioat_set_dest(dma_addr_t addr,
tx_to_ioat_desc(tx)->dst = addr;
}
/**
* ioat_dma_memcpy_issue_pending - push potentially unrecognized appended
* descriptors to hw
* @chan: DMA channel handle
*/
static inline void __ioat1_dma_memcpy_issue_pending(
struct ioat_dma_chan *ioat_chan);
struct ioat_dma_chan *ioat_chan)
{
ioat_chan->pending = 0;
writeb(IOAT_CHANCMD_APPEND, ioat_chan->reg_base + IOAT1_CHANCMD_OFFSET);
}
static void ioat1_dma_memcpy_issue_pending(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
if (ioat_chan->pending != 0) {
spin_lock_bh(&ioat_chan->desc_lock);
__ioat1_dma_memcpy_issue_pending(ioat_chan);
spin_unlock_bh(&ioat_chan->desc_lock);
}
}
static inline void __ioat2_dma_memcpy_issue_pending(
struct ioat_dma_chan *ioat_chan);
struct ioat_dma_chan *ioat_chan)
{
ioat_chan->pending = 0;
writew(ioat_chan->dmacount,
ioat_chan->reg_base + IOAT_CHAN_DMACOUNT_OFFSET);
}
static void ioat2_dma_memcpy_issue_pending(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
if (ioat_chan->pending != 0) {
spin_lock_bh(&ioat_chan->desc_lock);
__ioat2_dma_memcpy_issue_pending(ioat_chan);
spin_unlock_bh(&ioat_chan->desc_lock);
}
}
static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
{
......@@ -203,7 +240,7 @@ static dma_cookie_t ioat1_tx_submit(struct dma_async_tx_descriptor *tx)
prev = to_ioat_desc(ioat_chan->used_desc.prev);
prefetch(prev->hw);
do {
copy = min((u32) len, ioat_chan->xfercap);
copy = min_t(size_t, len, ioat_chan->xfercap);
new->async_tx.ack = 1;
......@@ -291,10 +328,12 @@ static dma_cookie_t ioat2_tx_submit(struct dma_async_tx_descriptor *tx)
orig_ack = first->async_tx.ack;
new = first;
/* ioat_chan->desc_lock is still in force in version 2 path */
/*
* ioat_chan->desc_lock is still in force in version 2 path
* it gets unlocked at end of this function
*/
do {
copy = min((u32) len, ioat_chan->xfercap);
copy = min_t(size_t, len, ioat_chan->xfercap);
new->async_tx.ack = 1;
......@@ -432,7 +471,7 @@ static void ioat2_dma_massage_chan_desc(struct ioat_dma_chan *ioat_chan)
static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
struct ioat_desc_sw *desc = NULL;
struct ioat_desc_sw *desc;
u16 chanctrl;
u32 chanerr;
int i;
......@@ -575,7 +614,7 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
static struct ioat_desc_sw *
ioat1_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
{
struct ioat_desc_sw *new = NULL;
struct ioat_desc_sw *new;
if (!list_empty(&ioat_chan->free_desc)) {
new = to_ioat_desc(ioat_chan->free_desc.next);
......@@ -583,9 +622,11 @@ ioat1_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
} else {
/* try to get another desc */
new = ioat_dma_alloc_descriptor(ioat_chan, GFP_ATOMIC);
/* will this ever happen? */
/* TODO add upper limit on these */
BUG_ON(!new);
if (!new) {
dev_err(&ioat_chan->device->pdev->dev,
"alloc failed\n");
return NULL;
}
}
prefetch(new->hw);
......@@ -595,7 +636,7 @@ ioat1_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
static struct ioat_desc_sw *
ioat2_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
{
struct ioat_desc_sw *new = NULL;
struct ioat_desc_sw *new;
/*
* used.prev points to where to start processing
......@@ -609,8 +650,8 @@ ioat2_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
if (ioat_chan->used_desc.prev &&
ioat_chan->used_desc.next == ioat_chan->used_desc.prev->prev) {
struct ioat_desc_sw *desc = NULL;
struct ioat_desc_sw *noop_desc = NULL;
struct ioat_desc_sw *desc;
struct ioat_desc_sw *noop_desc;
int i;
/* set up the noop descriptor */
......@@ -624,10 +665,14 @@ ioat2_dma_get_next_descriptor(struct ioat_dma_chan *ioat_chan)
ioat_chan->pending++;
ioat_chan->dmacount++;
/* get a few more descriptors */
/* try to get a few more descriptors */
for (i = 16; i; i--) {
desc = ioat_dma_alloc_descriptor(ioat_chan, GFP_ATOMIC);
BUG_ON(!desc);
if (!desc) {
dev_err(&ioat_chan->device->pdev->dev,
"alloc failed\n");
break;
}
list_add_tail(&desc->node, ioat_chan->used_desc.next);
desc->hw->next
......@@ -677,10 +722,13 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy(
spin_lock_bh(&ioat_chan->desc_lock);
new = ioat_dma_get_next_descriptor(ioat_chan);
new->len = len;
spin_unlock_bh(&ioat_chan->desc_lock);
return new ? &new->async_tx : NULL;
if (new) {
new->len = len;
return &new->async_tx;
} else
return NULL;
}
static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
......@@ -693,53 +741,17 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
spin_lock_bh(&ioat_chan->desc_lock);
new = ioat2_dma_get_next_descriptor(ioat_chan);
new->len = len;
/* leave ioat_chan->desc_lock set in version 2 path */
return new ? &new->async_tx : NULL;
}
/**
* ioat_dma_memcpy_issue_pending - push potentially unrecognized appended
* descriptors to hw
* @chan: DMA channel handle
/*
* leave ioat_chan->desc_lock set in ioat 2 path
* it will get unlocked at end of tx_submit
*/
static inline void __ioat1_dma_memcpy_issue_pending(
struct ioat_dma_chan *ioat_chan)
{
ioat_chan->pending = 0;
writeb(IOAT_CHANCMD_APPEND, ioat_chan->reg_base + IOAT1_CHANCMD_OFFSET);
}
static void ioat1_dma_memcpy_issue_pending(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
if (ioat_chan->pending != 0) {
spin_lock_bh(&ioat_chan->desc_lock);
__ioat1_dma_memcpy_issue_pending(ioat_chan);
spin_unlock_bh(&ioat_chan->desc_lock);
}
}
static inline void __ioat2_dma_memcpy_issue_pending(
struct ioat_dma_chan *ioat_chan)
{
ioat_chan->pending = 0;
writew(ioat_chan->dmacount,
ioat_chan->reg_base + IOAT_CHAN_DMACOUNT_OFFSET);
}
static void ioat2_dma_memcpy_issue_pending(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
if (ioat_chan->pending != 0) {
spin_lock_bh(&ioat_chan->desc_lock);
__ioat2_dma_memcpy_issue_pending(ioat_chan);
spin_unlock_bh(&ioat_chan->desc_lock);
}
if (new) {
new->len = len;
return &new->async_tx;
} else
return NULL;
}
static void ioat_dma_cleanup_tasklet(unsigned long data)
......@@ -1032,7 +1044,7 @@ static int ioat_dma_self_test(struct ioatdma_device *device)
u8 *src;
u8 *dest;
struct dma_chan *dma_chan;
struct dma_async_tx_descriptor *tx = NULL;
struct dma_async_tx_descriptor *tx;
dma_addr_t addr;
dma_cookie_t cookie;
int err = 0;
......
drivers/dma/ioatdma.h
View file @ 711924b1
......@@ -76,7 +76,7 @@ struct ioat_dma_chan {
dma_cookie_t completed_cookie;
unsigned long last_completion;
u32 xfercap; /* XFERCAP register value expanded out */
size_t xfercap; /* XFERCAP register value expanded out */
spinlock_t cleanup_lock;
spinlock_t desc_lock;
......
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