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ioatdma: Removing PQ val disable for cb3.3

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The PQ Val ops work on the newer hardware so we should actually provide support
for it and remove the disabling bits.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2013-03-26 15:43:09 -07:00 committed by Vinod Koul
parent 6ead7e4849
commit 3f09ede423
4 changed files with 125 additions and 14 deletions
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2
drivers/dma/Kconfig
View File

@ -63,8 +63,6 @@ config INTEL_IOATDMA
depends on PCI && X86
select DMA_ENGINE
select DCA
select ASYNC_TX_DISABLE_PQ_VAL_DMA
select ASYNC_TX_DISABLE_XOR_VAL_DMA
help
Enable support for the Intel(R) I/OAT DMA engine present
in recent Intel Xeon chipsets.

1
drivers/dma/ioat/dma.h
View File

@ -39,6 +39,7 @@
#define to_ioat_desc(lh) container_of(lh, struct ioat_desc_sw, node)
#define tx_to_ioat_desc(tx) container_of(tx, struct ioat_desc_sw, txd)
#define to_dev(ioat_chan) (&(ioat_chan)->device->pdev->dev)
#define to_pdev(ioat_chan) ((ioat_chan)->device->pdev)
#define chan_num(ch) ((int)((ch)->reg_base - (ch)->device->reg_base) / 0x80)

134
drivers/dma/ioat/dma_v3.c
View File

@ -79,6 +79,8 @@ static const u8 xor_idx_to_field[] = { 1, 4, 5, 6, 7, 0, 1, 2 };
static const u8 pq_idx_to_desc = 0xf8;
static const u8 pq_idx_to_field[] = { 1, 4, 5, 0, 1, 2, 4, 5 };
static void ioat3_eh(struct ioat2_dma_chan *ioat);
static dma_addr_t xor_get_src(struct ioat_raw_descriptor *descs[2], int idx)
{
struct ioat_raw_descriptor *raw = descs[xor_idx_to_desc >> idx & 1];
@ -347,6 +349,33 @@ static bool desc_has_ext(struct ioat_ring_ent *desc)
return false;
}
static u64 ioat3_get_current_completion(struct ioat_chan_common *chan)
{
u64 phys_complete;
u64 completion;
completion = *chan->completion;
phys_complete = ioat_chansts_to_addr(completion);
dev_dbg(to_dev(chan), "%s: phys_complete: %#llx\n", __func__,
(unsigned long long) phys_complete);
return phys_complete;
}
static bool ioat3_cleanup_preamble(struct ioat_chan_common *chan,
u64 *phys_complete)
{
*phys_complete = ioat3_get_current_completion(chan);
if (*phys_complete == chan->last_completion)
return false;
clear_bit(IOAT_COMPLETION_ACK, &chan->state);
mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
return true;
}
/**
* __cleanup - reclaim used descriptors
* @ioat: channel (ring) to clean
@ -365,6 +394,16 @@ static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete)
dev_dbg(to_dev(chan), "%s: head: %#x tail: %#x issued: %#x\n",
__func__, ioat->head, ioat->tail, ioat->issued);
/*
* At restart of the channel, the completion address and the
* channel status will be 0 due to starting a new chain. Since
* it's new chain and the first descriptor "fails", there is
* nothing to clean up. We do not want to reap the entire submitted
* chain due to this 0 address value and then BUG.
*/
if (!phys_complete)
return;
active = ioat2_ring_active(ioat);
for (i = 0; i < active && !seen_current; i++) {
struct dma_async_tx_descriptor *tx;
@ -411,11 +450,22 @@ static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete)
static void ioat3_cleanup(struct ioat2_dma_chan *ioat)
{
struct ioat_chan_common *chan = &ioat->base;
dma_addr_t phys_complete;
u64 phys_complete;
spin_lock_bh(&chan->cleanup_lock);
if (ioat_cleanup_preamble(chan, &phys_complete))
if (ioat3_cleanup_preamble(chan, &phys_complete))
__cleanup(ioat, phys_complete);
if (is_ioat_halted(*chan->completion)) {
u32 chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
if (chanerr & IOAT_CHANERR_HANDLE_MASK) {
mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
ioat3_eh(ioat);
}
}
spin_unlock_bh(&chan->cleanup_lock);
}
@ -430,15 +480,77 @@ static void ioat3_cleanup_event(unsigned long data)
static void ioat3_restart_channel(struct ioat2_dma_chan *ioat)
{
struct ioat_chan_common *chan = &ioat->base;
dma_addr_t phys_complete;
u64 phys_complete;
ioat2_quiesce(chan, 0);
if (ioat_cleanup_preamble(chan, &phys_complete))
if (ioat3_cleanup_preamble(chan, &phys_complete))
__cleanup(ioat, phys_complete);
__ioat2_restart_chan(ioat);
}
static void ioat3_eh(struct ioat2_dma_chan *ioat)
{
struct ioat_chan_common *chan = &ioat->base;
struct pci_dev *pdev = to_pdev(chan);
struct ioat_dma_descriptor *hw;
u64 phys_complete;
struct ioat_ring_ent *desc;
u32 err_handled = 0;
u32 chanerr_int;
u32 chanerr;
/* cleanup so tail points to descriptor that caused the error */
if (ioat3_cleanup_preamble(chan, &phys_complete))
__cleanup(ioat, phys_complete);
chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
pci_read_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, &chanerr_int);
dev_dbg(to_dev(chan), "%s: error = %x:%x\n",
__func__, chanerr, chanerr_int);
desc = ioat2_get_ring_ent(ioat, ioat->tail);
hw = desc->hw;
dump_desc_dbg(ioat, desc);
switch (hw->ctl_f.op) {
case IOAT_OP_XOR_VAL:
if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) {
*desc->result |= SUM_CHECK_P_RESULT;
err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR;
}
break;
case IOAT_OP_PQ_VAL:
if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) {
*desc->result |= SUM_CHECK_P_RESULT;
err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR;
}
if (chanerr & IOAT_CHANERR_XOR_Q_ERR) {
*desc->result |= SUM_CHECK_Q_RESULT;
err_handled |= IOAT_CHANERR_XOR_Q_ERR;
}
break;
}
/* fault on unhandled error or spurious halt */
if (chanerr ^ err_handled || chanerr == 0) {
dev_err(to_dev(chan), "%s: fatal error (%x:%x)\n",
__func__, chanerr, err_handled);
BUG();
}
writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET);
pci_write_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, chanerr_int);
/* mark faulting descriptor as complete */
*chan->completion = desc->txd.phys;
spin_lock_bh(&ioat->prep_lock);
ioat3_restart_channel(ioat);
spin_unlock_bh(&ioat->prep_lock);
}
static void check_active(struct ioat2_dma_chan *ioat)
{
struct ioat_chan_common *chan = &ioat->base;
@ -1441,15 +1553,13 @@ int ioat3_dma_probe(struct ioatdma_device *device, int dca)
device->cleanup_fn = ioat3_cleanup_event;
device->timer_fn = ioat3_timer_event;
#ifdef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
dma_cap_clear(DMA_PQ_VAL, dma->cap_mask);
dma->device_prep_dma_pq_val = NULL;
#endif
if (is_xeon_cb32(pdev)) {
dma_cap_clear(DMA_XOR_VAL, dma->cap_mask);
dma->device_prep_dma_xor_val = NULL;
#ifdef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
dma_cap_clear(DMA_XOR_VAL, dma->cap_mask);
dma->device_prep_dma_xor_val = NULL;
#endif
dma_cap_clear(DMA_PQ_VAL, dma->cap_mask);
dma->device_prep_dma_pq_val = NULL;
}
err = ioat_probe(device);
if (err)

2
drivers/dma/ioat/registers.h
View File

@ -93,6 +93,8 @@
#define IOAT_CHANCTRL_ERR_COMPLETION_EN 0x0004
#define IOAT_CHANCTRL_INT_REARM 0x0001
#define IOAT_CHANCTRL_RUN (IOAT_CHANCTRL_INT_REARM |\
IOAT_CHANCTRL_ERR_INT_EN |\
IOAT_CHANCTRL_ERR_COMPLETION_EN |\
IOAT_CHANCTRL_ANY_ERR_ABORT_EN)
#define IOAT_DMA_COMP_OFFSET 0x02 /* 16-bit DMA channel compatibility */