obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o
-ioatdma-y := init.o dma.o dma_v3.o prep.o dca.o sysfs.o
+ioatdma-y := init.o dma.o prep.o dca.o sysfs.o
return 0;
}
-static int ioat3_dca_add_requester(struct dca_provider *dca, struct device *dev)
+static int ioat_dca_add_requester(struct dca_provider *dca, struct device *dev)
{
struct ioat_dca_priv *ioatdca = dca_priv(dca);
struct pci_dev *pdev;
return -EFAULT;
}
-static int ioat3_dca_remove_requester(struct dca_provider *dca,
+static int ioat_dca_remove_requester(struct dca_provider *dca,
struct device *dev)
{
struct ioat_dca_priv *ioatdca = dca_priv(dca);
return -ENODEV;
}
-static u8 ioat3_dca_get_tag(struct dca_provider *dca,
+static u8 ioat_dca_get_tag(struct dca_provider *dca,
struct device *dev,
int cpu)
{
return tag;
}
-static struct dca_ops ioat3_dca_ops = {
- .add_requester = ioat3_dca_add_requester,
- .remove_requester = ioat3_dca_remove_requester,
- .get_tag = ioat3_dca_get_tag,
+static struct dca_ops ioat_dca_ops = {
+ .add_requester = ioat_dca_add_requester,
+ .remove_requester = ioat_dca_remove_requester,
+ .get_tag = ioat_dca_get_tag,
.dev_managed = ioat_dca_dev_managed,
};
-static int ioat3_dca_count_dca_slots(void *iobase, u16 dca_offset)
+static int ioat_dca_count_dca_slots(void *iobase, u16 dca_offset)
{
int slots = 0;
u32 req;
(tag_map[4] == DCA_TAG_MAP_VALID));
}
-struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase)
+struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase)
{
struct dca_provider *dca;
struct ioat_dca_priv *ioatdca;
if (dca_offset == 0)
return NULL;
- slots = ioat3_dca_count_dca_slots(iobase, dca_offset);
+ slots = ioat_dca_count_dca_slots(iobase, dca_offset);
if (slots == 0)
return NULL;
- dca = alloc_dca_provider(&ioat3_dca_ops,
+ dca = alloc_dca_provider(&ioat_dca_ops,
sizeof(*ioatdca)
+ (sizeof(struct ioat_dca_slot) * slots));
if (!dca)
#include "../dmaengine.h"
+static void ioat_eh(struct ioatdma_chan *ioat_chan);
+
/**
* ioat_dma_do_interrupt - handler used for single vector interrupt mode
* @irq: interrupt id
ioat_dma->cleanup_fn((unsigned long)&ioat_chan->dma_chan);
}
-dma_addr_t ioat_get_current_completion(struct ioatdma_chan *ioat_chan)
-{
- dma_addr_t phys_complete;
- u64 completion;
-
- completion = *ioat_chan->completion;
- phys_complete = ioat_chansts_to_addr(completion);
-
- dev_dbg(to_dev(ioat_chan), "%s: phys_complete: %#llx\n", __func__,
- (unsigned long long) phys_complete);
-
- if (is_ioat_halted(completion)) {
- u32 chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
-
- dev_err(to_dev(ioat_chan), "Channel halted, chanerr = %x\n",
- chanerr);
-
- /* TODO do something to salvage the situation */
- }
-
- return phys_complete;
-}
-
-bool ioat_cleanup_preamble(struct ioatdma_chan *ioat_chan,
- dma_addr_t *phys_complete)
-{
- *phys_complete = ioat_get_current_completion(ioat_chan);
- if (*phys_complete == ioat_chan->last_completion)
- return false;
- clear_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
- mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
-
- return true;
-}
-
-enum dma_status
-ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
- struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
- enum dma_status ret;
-
- ret = dma_cookie_status(c, cookie, txstate);
- if (ret == DMA_COMPLETE)
- return ret;
-
- ioat_dma->cleanup_fn((unsigned long) c);
-
- return dma_cookie_status(c, cookie, txstate);
-}
-
-void __ioat_issue_pending(struct ioatdma_chan *ioat_chan)
+static void __ioat_issue_pending(struct ioatdma_chan *ioat_chan)
{
ioat_chan->dmacount += ioat_ring_pending(ioat_chan);
ioat_chan->issued = ioat_chan->head;
spin_unlock_bh(&ioat_chan->prep_lock);
}
-void __ioat_restart_chan(struct ioatdma_chan *ioat_chan)
+static void __ioat_restart_chan(struct ioatdma_chan *ioat_chan)
{
/* set the tail to be re-issued */
ioat_chan->issued = ioat_chan->tail;
__ioat_start_null_desc(ioat_chan);
}
-int ioat_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo)
+static int ioat_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo)
{
unsigned long end = jiffies + tmo;
int err = 0;
return err;
}
-int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo)
+static int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo)
{
unsigned long end = jiffies + tmo;
int err = 0;
return ring;
}
-bool reshape_ring(struct ioatdma_chan *ioat_chan, int order)
+static bool reshape_ring(struct ioatdma_chan *ioat_chan, int order)
{
/* reshape differs from normal ring allocation in that we want
* to allocate a new software ring while only
return -ENOMEM;
}
+
+static bool desc_has_ext(struct ioat_ring_ent *desc)
+{
+ struct ioat_dma_descriptor *hw = desc->hw;
+
+ if (hw->ctl_f.op == IOAT_OP_XOR ||
+ hw->ctl_f.op == IOAT_OP_XOR_VAL) {
+ struct ioat_xor_descriptor *xor = desc->xor;
+
+ if (src_cnt_to_sw(xor->ctl_f.src_cnt) > 5)
+ return true;
+ } else if (hw->ctl_f.op == IOAT_OP_PQ ||
+ hw->ctl_f.op == IOAT_OP_PQ_VAL) {
+ struct ioat_pq_descriptor *pq = desc->pq;
+
+ if (src_cnt_to_sw(pq->ctl_f.src_cnt) > 3)
+ return true;
+ }
+
+ return false;
+}
+
+static void
+ioat_free_sed(struct ioatdma_device *ioat_dma, struct ioat_sed_ent *sed)
+{
+ if (!sed)
+ return;
+
+ dma_pool_free(ioat_dma->sed_hw_pool[sed->hw_pool], sed->hw, sed->dma);
+ kmem_cache_free(ioat_sed_cache, sed);
+}
+
+static u64 ioat_get_current_completion(struct ioatdma_chan *ioat_chan)
+{
+ u64 phys_complete;
+ u64 completion;
+
+ completion = *ioat_chan->completion;
+ phys_complete = ioat_chansts_to_addr(completion);
+
+ dev_dbg(to_dev(ioat_chan), "%s: phys_complete: %#llx\n", __func__,
+ (unsigned long long) phys_complete);
+
+ return phys_complete;
+}
+
+static bool ioat_cleanup_preamble(struct ioatdma_chan *ioat_chan,
+ u64 *phys_complete)
+{
+ *phys_complete = ioat_get_current_completion(ioat_chan);
+ if (*phys_complete == ioat_chan->last_completion)
+ return false;
+
+ clear_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
+ mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
+
+ return true;
+}
+
+static void
+desc_get_errstat(struct ioatdma_chan *ioat_chan, struct ioat_ring_ent *desc)
+{
+ struct ioat_dma_descriptor *hw = desc->hw;
+
+ switch (hw->ctl_f.op) {
+ case IOAT_OP_PQ_VAL:
+ case IOAT_OP_PQ_VAL_16S:
+ {
+ struct ioat_pq_descriptor *pq = desc->pq;
+
+ /* check if there's error written */
+ if (!pq->dwbes_f.wbes)
+ return;
+
+ /* need to set a chanerr var for checking to clear later */
+
+ if (pq->dwbes_f.p_val_err)
+ *desc->result |= SUM_CHECK_P_RESULT;
+
+ if (pq->dwbes_f.q_val_err)
+ *desc->result |= SUM_CHECK_Q_RESULT;
+
+ return;
+ }
+ default:
+ return;
+ }
+}
+
+/**
+ * __cleanup - reclaim used descriptors
+ * @ioat: channel (ring) to clean
+ */
+static void __cleanup(struct ioatdma_chan *ioat_chan, dma_addr_t phys_complete)
+{
+ struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
+ struct ioat_ring_ent *desc;
+ bool seen_current = false;
+ int idx = ioat_chan->tail, i;
+ u16 active;
+
+ dev_dbg(to_dev(ioat_chan), "%s: head: %#x tail: %#x issued: %#x\n",
+ __func__, ioat_chan->head, ioat_chan->tail, ioat_chan->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 = ioat_ring_active(ioat_chan);
+ for (i = 0; i < active && !seen_current; i++) {
+ struct dma_async_tx_descriptor *tx;
+
+ smp_read_barrier_depends();
+ prefetch(ioat_get_ring_ent(ioat_chan, idx + i + 1));
+ desc = ioat_get_ring_ent(ioat_chan, idx + i);
+ dump_desc_dbg(ioat_chan, desc);
+
+ /* set err stat if we are using dwbes */
+ if (ioat_dma->cap & IOAT_CAP_DWBES)
+ desc_get_errstat(ioat_chan, desc);
+
+ tx = &desc->txd;
+ if (tx->cookie) {
+ dma_cookie_complete(tx);
+ dma_descriptor_unmap(tx);
+ if (tx->callback) {
+ tx->callback(tx->callback_param);
+ tx->callback = NULL;
+ }
+ }
+
+ if (tx->phys == phys_complete)
+ seen_current = true;
+
+ /* skip extended descriptors */
+ if (desc_has_ext(desc)) {
+ BUG_ON(i + 1 >= active);
+ i++;
+ }
+
+ /* cleanup super extended descriptors */
+ if (desc->sed) {
+ ioat_free_sed(ioat_dma, desc->sed);
+ desc->sed = NULL;
+ }
+ }
+
+ /* finish all descriptor reads before incrementing tail */
+ smp_mb();
+ ioat_chan->tail = idx + i;
+ /* no active descs have written a completion? */
+ BUG_ON(active && !seen_current);
+ ioat_chan->last_completion = phys_complete;
+
+ if (active - i == 0) {
+ dev_dbg(to_dev(ioat_chan), "%s: cancel completion timeout\n",
+ __func__);
+ clear_bit(IOAT_COMPLETION_PENDING, &ioat_chan->state);
+ mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
+ }
+
+ /* 5 microsecond delay per pending descriptor */
+ writew(min((5 * (active - i)), IOAT_INTRDELAY_MASK),
+ ioat_chan->ioat_dma->reg_base + IOAT_INTRDELAY_OFFSET);
+}
+
+static void ioat_cleanup(struct ioatdma_chan *ioat_chan)
+{
+ u64 phys_complete;
+
+ spin_lock_bh(&ioat_chan->cleanup_lock);
+
+ if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
+ __cleanup(ioat_chan, phys_complete);
+
+ if (is_ioat_halted(*ioat_chan->completion)) {
+ u32 chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+
+ if (chanerr & IOAT_CHANERR_HANDLE_MASK) {
+ mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
+ ioat_eh(ioat_chan);
+ }
+ }
+
+ spin_unlock_bh(&ioat_chan->cleanup_lock);
+}
+
+void ioat_cleanup_event(unsigned long data)
+{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
+
+ ioat_cleanup(ioat_chan);
+ if (!test_bit(IOAT_RUN, &ioat_chan->state))
+ return;
+ writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
+}
+
+static void ioat_restart_channel(struct ioatdma_chan *ioat_chan)
+{
+ u64 phys_complete;
+
+ ioat_quiesce(ioat_chan, 0);
+ if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
+ __cleanup(ioat_chan, phys_complete);
+
+ __ioat_restart_chan(ioat_chan);
+}
+
+static void ioat_eh(struct ioatdma_chan *ioat_chan)
+{
+ struct pci_dev *pdev = to_pdev(ioat_chan);
+ struct ioat_dma_descriptor *hw;
+ struct dma_async_tx_descriptor *tx;
+ 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 (ioat_cleanup_preamble(ioat_chan, &phys_complete))
+ __cleanup(ioat_chan, phys_complete);
+
+ chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+ pci_read_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, &chanerr_int);
+
+ dev_dbg(to_dev(ioat_chan), "%s: error = %x:%x\n",
+ __func__, chanerr, chanerr_int);
+
+ desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail);
+ hw = desc->hw;
+ dump_desc_dbg(ioat_chan, 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:
+ case IOAT_OP_PQ_VAL_16S:
+ 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(ioat_chan), "%s: fatal error (%x:%x)\n",
+ __func__, chanerr, err_handled);
+ BUG();
+ } else { /* cleanup the faulty descriptor */
+ tx = &desc->txd;
+ if (tx->cookie) {
+ dma_cookie_complete(tx);
+ dma_descriptor_unmap(tx);
+ if (tx->callback) {
+ tx->callback(tx->callback_param);
+ tx->callback = NULL;
+ }
+ }
+ }
+
+ writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+ pci_write_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, chanerr_int);
+
+ /* mark faulting descriptor as complete */
+ *ioat_chan->completion = desc->txd.phys;
+
+ spin_lock_bh(&ioat_chan->prep_lock);
+ ioat_restart_channel(ioat_chan);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+}
+
+static void check_active(struct ioatdma_chan *ioat_chan)
+{
+ if (ioat_ring_active(ioat_chan)) {
+ mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
+ return;
+ }
+
+ if (test_and_clear_bit(IOAT_CHAN_ACTIVE, &ioat_chan->state))
+ mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
+ else if (ioat_chan->alloc_order > ioat_get_alloc_order()) {
+ /* if the ring is idle, empty, and oversized try to step
+ * down the size
+ */
+ reshape_ring(ioat_chan, ioat_chan->alloc_order - 1);
+
+ /* keep shrinking until we get back to our minimum
+ * default size
+ */
+ if (ioat_chan->alloc_order > ioat_get_alloc_order())
+ mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
+ }
+
+}
+
+void ioat_timer_event(unsigned long data)
+{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
+ dma_addr_t phys_complete;
+ u64 status;
+
+ status = ioat_chansts(ioat_chan);
+
+ /* when halted due to errors check for channel
+ * programming errors before advancing the completion state
+ */
+ if (is_ioat_halted(status)) {
+ u32 chanerr;
+
+ chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+ dev_err(to_dev(ioat_chan), "%s: Channel halted (%x)\n",
+ __func__, chanerr);
+ if (test_bit(IOAT_RUN, &ioat_chan->state))
+ BUG_ON(is_ioat_bug(chanerr));
+ else /* we never got off the ground */
+ return;
+ }
+
+ /* if we haven't made progress and we have already
+ * acknowledged a pending completion once, then be more
+ * forceful with a restart
+ */
+ spin_lock_bh(&ioat_chan->cleanup_lock);
+ if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
+ __cleanup(ioat_chan, phys_complete);
+ else if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) {
+ spin_lock_bh(&ioat_chan->prep_lock);
+ ioat_restart_channel(ioat_chan);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+ spin_unlock_bh(&ioat_chan->cleanup_lock);
+ return;
+ } else {
+ set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
+ mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
+ }
+
+
+ if (ioat_ring_active(ioat_chan))
+ mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
+ else {
+ spin_lock_bh(&ioat_chan->prep_lock);
+ check_active(ioat_chan);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+ }
+ spin_unlock_bh(&ioat_chan->cleanup_lock);
+}
+
+enum dma_status
+ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
+ enum dma_status ret;
+
+ ret = dma_cookie_status(c, cookie, txstate);
+ if (ret == DMA_COMPLETE)
+ return ret;
+
+ ioat_cleanup(ioat_chan);
+
+ return dma_cookie_status(c, cookie, txstate);
+}
+
+static int ioat_irq_reinit(struct ioatdma_device *ioat_dma)
+{
+ struct pci_dev *pdev = ioat_dma->pdev;
+ int irq = pdev->irq, i;
+
+ if (!is_bwd_ioat(pdev))
+ return 0;
+
+ switch (ioat_dma->irq_mode) {
+ case IOAT_MSIX:
+ for (i = 0; i < ioat_dma->dma_dev.chancnt; i++) {
+ struct msix_entry *msix = &ioat_dma->msix_entries[i];
+ struct ioatdma_chan *ioat_chan;
+
+ ioat_chan = ioat_chan_by_index(ioat_dma, i);
+ devm_free_irq(&pdev->dev, msix->vector, ioat_chan);
+ }
+
+ pci_disable_msix(pdev);
+ break;
+ case IOAT_MSI:
+ pci_disable_msi(pdev);
+ /* fall through */
+ case IOAT_INTX:
+ devm_free_irq(&pdev->dev, irq, ioat_dma);
+ break;
+ default:
+ return 0;
+ }
+ ioat_dma->irq_mode = IOAT_NOIRQ;
+
+ return ioat_dma_setup_interrupts(ioat_dma);
+}
+
+int ioat_reset_hw(struct ioatdma_chan *ioat_chan)
+{
+ /* throw away whatever the channel was doing and get it
+ * initialized, with ioat3 specific workarounds
+ */
+ struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
+ struct pci_dev *pdev = ioat_dma->pdev;
+ u32 chanerr;
+ u16 dev_id;
+ int err;
+
+ ioat_quiesce(ioat_chan, msecs_to_jiffies(100));
+
+ chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+ writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
+
+ if (ioat_dma->version < IOAT_VER_3_3) {
+ /* clear any pending errors */
+ err = pci_read_config_dword(pdev,
+ IOAT_PCI_CHANERR_INT_OFFSET, &chanerr);
+ if (err) {
+ dev_err(&pdev->dev,
+ "channel error register unreachable\n");
+ return err;
+ }
+ pci_write_config_dword(pdev,
+ IOAT_PCI_CHANERR_INT_OFFSET, chanerr);
+
+ /* Clear DMAUNCERRSTS Cfg-Reg Parity Error status bit
+ * (workaround for spurious config parity error after restart)
+ */
+ pci_read_config_word(pdev, IOAT_PCI_DEVICE_ID_OFFSET, &dev_id);
+ if (dev_id == PCI_DEVICE_ID_INTEL_IOAT_TBG0) {
+ pci_write_config_dword(pdev,
+ IOAT_PCI_DMAUNCERRSTS_OFFSET,
+ 0x10);
+ }
+ }
+
+ err = ioat_reset_sync(ioat_chan, msecs_to_jiffies(200));
+ if (!err)
+ err = ioat_irq_reinit(ioat_dma);
+
+ if (err)
+ dev_err(&pdev->dev, "Failed to reset: %d\n", err);
+
+ return err;
+}
struct dma_tx_state *txstate);
void ioat_cleanup_event(unsigned long data);
void ioat_timer_event(unsigned long data);
-enum dma_status ioat_dma_tx_status(struct dma_chan *c, dma_cookie_t cookie,
- struct dma_tx_state *txstate);
-bool ioat_cleanup_preamble(struct ioatdma_chan *ioat_chan,
- dma_addr_t *phys_complete);
int ioat_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs);
void ioat_issue_pending(struct dma_chan *chan);
-bool reshape_ring(struct ioatdma_chan *ioat, int order);
-void __ioat_issue_pending(struct ioatdma_chan *ioat_chan);
void ioat_timer_event(unsigned long data);
-int ioat_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo);
-int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo);
-void __ioat_restart_chan(struct ioatdma_chan *ioat_chan);
/* IOAT Init functions */
bool is_bwd_ioat(struct pci_dev *pdev);
+struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase);
void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type);
void ioat_kobject_del(struct ioatdma_device *ioat_dma);
int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma);
void ioat_stop(struct ioatdma_chan *ioat_chan);
-struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase);
#endif /* IOATDMA_H */
+++ /dev/null
-/*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved.
- *
- * 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 that 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.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * BSD LICENSE
- *
- * Copyright(c) 2004-2009 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Support routines for v3+ hardware
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/gfp.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/prefetch.h>
-#include "../dmaengine.h"
-#include "registers.h"
-#include "hw.h"
-#include "dma.h"
-
-static void ioat3_eh(struct ioatdma_chan *ioat_chan);
-
-static bool desc_has_ext(struct ioat_ring_ent *desc)
-{
- struct ioat_dma_descriptor *hw = desc->hw;
-
- if (hw->ctl_f.op == IOAT_OP_XOR ||
- hw->ctl_f.op == IOAT_OP_XOR_VAL) {
- struct ioat_xor_descriptor *xor = desc->xor;
-
- if (src_cnt_to_sw(xor->ctl_f.src_cnt) > 5)
- return true;
- } else if (hw->ctl_f.op == IOAT_OP_PQ ||
- hw->ctl_f.op == IOAT_OP_PQ_VAL) {
- struct ioat_pq_descriptor *pq = desc->pq;
-
- if (src_cnt_to_sw(pq->ctl_f.src_cnt) > 3)
- return true;
- }
-
- return false;
-}
-
-static void
-ioat3_free_sed(struct ioatdma_device *ioat_dma, struct ioat_sed_ent *sed)
-{
- if (!sed)
- return;
-
- dma_pool_free(ioat_dma->sed_hw_pool[sed->hw_pool], sed->hw, sed->dma);
- kmem_cache_free(ioat_sed_cache, sed);
-}
-
-static u64 ioat3_get_current_completion(struct ioatdma_chan *ioat_chan)
-{
- u64 phys_complete;
- u64 completion;
-
- completion = *ioat_chan->completion;
- phys_complete = ioat_chansts_to_addr(completion);
-
- dev_dbg(to_dev(ioat_chan), "%s: phys_complete: %#llx\n", __func__,
- (unsigned long long) phys_complete);
-
- return phys_complete;
-}
-
-static bool ioat3_cleanup_preamble(struct ioatdma_chan *ioat_chan,
- u64 *phys_complete)
-{
- *phys_complete = ioat3_get_current_completion(ioat_chan);
- if (*phys_complete == ioat_chan->last_completion)
- return false;
-
- clear_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
- mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
-
- return true;
-}
-
-static void
-desc_get_errstat(struct ioatdma_chan *ioat_chan, struct ioat_ring_ent *desc)
-{
- struct ioat_dma_descriptor *hw = desc->hw;
-
- switch (hw->ctl_f.op) {
- case IOAT_OP_PQ_VAL:
- case IOAT_OP_PQ_VAL_16S:
- {
- struct ioat_pq_descriptor *pq = desc->pq;
-
- /* check if there's error written */
- if (!pq->dwbes_f.wbes)
- return;
-
- /* need to set a chanerr var for checking to clear later */
-
- if (pq->dwbes_f.p_val_err)
- *desc->result |= SUM_CHECK_P_RESULT;
-
- if (pq->dwbes_f.q_val_err)
- *desc->result |= SUM_CHECK_Q_RESULT;
-
- return;
- }
- default:
- return;
- }
-}
-
-/**
- * __cleanup - reclaim used descriptors
- * @ioat: channel (ring) to clean
- *
- * The difference from the dma_v2.c __cleanup() is that this routine
- * handles extended descriptors and dma-unmapping raid operations.
- */
-static void __cleanup(struct ioatdma_chan *ioat_chan, dma_addr_t phys_complete)
-{
- struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
- struct ioat_ring_ent *desc;
- bool seen_current = false;
- int idx = ioat_chan->tail, i;
- u16 active;
-
- dev_dbg(to_dev(ioat_chan), "%s: head: %#x tail: %#x issued: %#x\n",
- __func__, ioat_chan->head, ioat_chan->tail, ioat_chan->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 = ioat_ring_active(ioat_chan);
- for (i = 0; i < active && !seen_current; i++) {
- struct dma_async_tx_descriptor *tx;
-
- smp_read_barrier_depends();
- prefetch(ioat_get_ring_ent(ioat_chan, idx + i + 1));
- desc = ioat_get_ring_ent(ioat_chan, idx + i);
- dump_desc_dbg(ioat_chan, desc);
-
- /* set err stat if we are using dwbes */
- if (ioat_dma->cap & IOAT_CAP_DWBES)
- desc_get_errstat(ioat_chan, desc);
-
- tx = &desc->txd;
- if (tx->cookie) {
- dma_cookie_complete(tx);
- dma_descriptor_unmap(tx);
- if (tx->callback) {
- tx->callback(tx->callback_param);
- tx->callback = NULL;
- }
- }
-
- if (tx->phys == phys_complete)
- seen_current = true;
-
- /* skip extended descriptors */
- if (desc_has_ext(desc)) {
- BUG_ON(i + 1 >= active);
- i++;
- }
-
- /* cleanup super extended descriptors */
- if (desc->sed) {
- ioat3_free_sed(ioat_dma, desc->sed);
- desc->sed = NULL;
- }
- }
- smp_mb(); /* finish all descriptor reads before incrementing tail */
- ioat_chan->tail = idx + i;
- BUG_ON(active && !seen_current); /* no active descs have written a completion? */
- ioat_chan->last_completion = phys_complete;
-
- if (active - i == 0) {
- dev_dbg(to_dev(ioat_chan), "%s: cancel completion timeout\n",
- __func__);
- clear_bit(IOAT_COMPLETION_PENDING, &ioat_chan->state);
- mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
- }
- /* 5 microsecond delay per pending descriptor */
- writew(min((5 * (active - i)), IOAT_INTRDELAY_MASK),
- ioat_chan->ioat_dma->reg_base + IOAT_INTRDELAY_OFFSET);
-}
-
-static void ioat3_cleanup(struct ioatdma_chan *ioat_chan)
-{
- u64 phys_complete;
-
- spin_lock_bh(&ioat_chan->cleanup_lock);
-
- if (ioat3_cleanup_preamble(ioat_chan, &phys_complete))
- __cleanup(ioat_chan, phys_complete);
-
- if (is_ioat_halted(*ioat_chan->completion)) {
- u32 chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
-
- if (chanerr & IOAT_CHANERR_HANDLE_MASK) {
- mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
- ioat3_eh(ioat_chan);
- }
- }
-
- spin_unlock_bh(&ioat_chan->cleanup_lock);
-}
-
-void ioat_cleanup_event(unsigned long data)
-{
- struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
-
- ioat3_cleanup(ioat_chan);
- if (!test_bit(IOAT_RUN, &ioat_chan->state))
- return;
- writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
-}
-
-static void ioat3_restart_channel(struct ioatdma_chan *ioat_chan)
-{
- u64 phys_complete;
-
- ioat_quiesce(ioat_chan, 0);
- if (ioat3_cleanup_preamble(ioat_chan, &phys_complete))
- __cleanup(ioat_chan, phys_complete);
-
- __ioat_restart_chan(ioat_chan);
-}
-
-static void ioat3_eh(struct ioatdma_chan *ioat_chan)
-{
- struct pci_dev *pdev = to_pdev(ioat_chan);
- struct ioat_dma_descriptor *hw;
- struct dma_async_tx_descriptor *tx;
- 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(ioat_chan, &phys_complete))
- __cleanup(ioat_chan, phys_complete);
-
- chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
- pci_read_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, &chanerr_int);
-
- dev_dbg(to_dev(ioat_chan), "%s: error = %x:%x\n",
- __func__, chanerr, chanerr_int);
-
- desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail);
- hw = desc->hw;
- dump_desc_dbg(ioat_chan, 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:
- case IOAT_OP_PQ_VAL_16S:
- 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(ioat_chan), "%s: fatal error (%x:%x)\n",
- __func__, chanerr, err_handled);
- BUG();
- } else { /* cleanup the faulty descriptor */
- tx = &desc->txd;
- if (tx->cookie) {
- dma_cookie_complete(tx);
- dma_descriptor_unmap(tx);
- if (tx->callback) {
- tx->callback(tx->callback_param);
- tx->callback = NULL;
- }
- }
- }
-
- writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
- pci_write_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, chanerr_int);
-
- /* mark faulting descriptor as complete */
- *ioat_chan->completion = desc->txd.phys;
-
- spin_lock_bh(&ioat_chan->prep_lock);
- ioat3_restart_channel(ioat_chan);
- spin_unlock_bh(&ioat_chan->prep_lock);
-}
-
-static void check_active(struct ioatdma_chan *ioat_chan)
-{
- if (ioat_ring_active(ioat_chan)) {
- mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
- return;
- }
-
- if (test_and_clear_bit(IOAT_CHAN_ACTIVE, &ioat_chan->state))
- mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
- else if (ioat_chan->alloc_order > ioat_get_alloc_order()) {
- /* if the ring is idle, empty, and oversized try to step
- * down the size
- */
- reshape_ring(ioat_chan, ioat_chan->alloc_order - 1);
-
- /* keep shrinking until we get back to our minimum
- * default size
- */
- if (ioat_chan->alloc_order > ioat_get_alloc_order())
- mod_timer(&ioat_chan->timer, jiffies + IDLE_TIMEOUT);
- }
-
-}
-
-void ioat_timer_event(unsigned long data)
-{
- struct ioatdma_chan *ioat_chan = to_ioat_chan((void *)data);
- dma_addr_t phys_complete;
- u64 status;
-
- status = ioat_chansts(ioat_chan);
-
- /* when halted due to errors check for channel
- * programming errors before advancing the completion state
- */
- if (is_ioat_halted(status)) {
- u32 chanerr;
-
- chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
- dev_err(to_dev(ioat_chan), "%s: Channel halted (%x)\n",
- __func__, chanerr);
- if (test_bit(IOAT_RUN, &ioat_chan->state))
- BUG_ON(is_ioat_bug(chanerr));
- else /* we never got off the ground */
- return;
- }
-
- /* if we haven't made progress and we have already
- * acknowledged a pending completion once, then be more
- * forceful with a restart
- */
- spin_lock_bh(&ioat_chan->cleanup_lock);
- if (ioat_cleanup_preamble(ioat_chan, &phys_complete))
- __cleanup(ioat_chan, phys_complete);
- else if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) {
- spin_lock_bh(&ioat_chan->prep_lock);
- ioat3_restart_channel(ioat_chan);
- spin_unlock_bh(&ioat_chan->prep_lock);
- spin_unlock_bh(&ioat_chan->cleanup_lock);
- return;
- } else {
- set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
- mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
- }
-
-
- if (ioat_ring_active(ioat_chan))
- mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
- else {
- spin_lock_bh(&ioat_chan->prep_lock);
- check_active(ioat_chan);
- spin_unlock_bh(&ioat_chan->prep_lock);
- }
- spin_unlock_bh(&ioat_chan->cleanup_lock);
-}
-
-enum dma_status
-ioat_tx_status(struct dma_chan *c, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
- enum dma_status ret;
-
- ret = dma_cookie_status(c, cookie, txstate);
- if (ret == DMA_COMPLETE)
- return ret;
-
- ioat3_cleanup(ioat_chan);
-
- return dma_cookie_status(c, cookie, txstate);
-}
-
-static int ioat3_irq_reinit(struct ioatdma_device *ioat_dma)
-{
- struct pci_dev *pdev = ioat_dma->pdev;
- int irq = pdev->irq, i;
-
- if (!is_bwd_ioat(pdev))
- return 0;
-
- switch (ioat_dma->irq_mode) {
- case IOAT_MSIX:
- for (i = 0; i < ioat_dma->dma_dev.chancnt; i++) {
- struct msix_entry *msix = &ioat_dma->msix_entries[i];
- struct ioatdma_chan *ioat_chan;
-
- ioat_chan = ioat_chan_by_index(ioat_dma, i);
- devm_free_irq(&pdev->dev, msix->vector, ioat_chan);
- }
-
- pci_disable_msix(pdev);
- break;
- case IOAT_MSI:
- pci_disable_msi(pdev);
- /* fall through */
- case IOAT_INTX:
- devm_free_irq(&pdev->dev, irq, ioat_dma);
- break;
- default:
- return 0;
- }
- ioat_dma->irq_mode = IOAT_NOIRQ;
-
- return ioat_dma_setup_interrupts(ioat_dma);
-}
-
-int ioat_reset_hw(struct ioatdma_chan *ioat_chan)
-{
- /* throw away whatever the channel was doing and get it
- * initialized, with ioat3 specific workarounds
- */
- struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
- struct pci_dev *pdev = ioat_dma->pdev;
- u32 chanerr;
- u16 dev_id;
- int err;
-
- ioat_quiesce(ioat_chan, msecs_to_jiffies(100));
-
- chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
- writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
-
- if (ioat_dma->version < IOAT_VER_3_3) {
- /* clear any pending errors */
- err = pci_read_config_dword(pdev,
- IOAT_PCI_CHANERR_INT_OFFSET, &chanerr);
- if (err) {
- dev_err(&pdev->dev,
- "channel error register unreachable\n");
- return err;
- }
- pci_write_config_dword(pdev,
- IOAT_PCI_CHANERR_INT_OFFSET, chanerr);
-
- /* Clear DMAUNCERRSTS Cfg-Reg Parity Error status bit
- * (workaround for spurious config parity error after restart)
- */
- pci_read_config_word(pdev, IOAT_PCI_DEVICE_ID_OFFSET, &dev_id);
- if (dev_id == PCI_DEVICE_ID_INTEL_IOAT_TBG0) {
- pci_write_config_dword(pdev,
- IOAT_PCI_DMAUNCERRSTS_OFFSET,
- 0x10);
- }
- }
-
- err = ioat_reset_sync(ioat_chan, msecs_to_jiffies(200));
- if (!err)
- err = ioat3_irq_reinit(ioat_dma);
-
- if (err)
- dev_err(&pdev->dev, "Failed to reset: %d\n", err);
-
- return err;
-}
tasklet_init(&ioat_chan->cleanup_task, ioat_dma->cleanup_fn, data);
}
-static void ioat3_dma_test_callback(void *dma_async_param)
-{
- struct completion *cmp = dma_async_param;
-
- complete(cmp);
-}
-
#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma)
{
async_tx_ack(tx);
init_completion(&cmp);
- tx->callback = ioat3_dma_test_callback;
+ tx->callback = ioat_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
async_tx_ack(tx);
init_completion(&cmp);
- tx->callback = ioat3_dma_test_callback;
+ tx->callback = ioat_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
async_tx_ack(tx);
init_completion(&cmp);
- tx->callback = ioat3_dma_test_callback;
+ tx->callback = ioat_dma_test_callback;
tx->callback_param = &cmp;
cookie = tx->tx_submit(tx);
if (cookie < 0) {
return 0;
}
-static void ioat3_intr_quirk(struct ioatdma_device *ioat_dma)
+static void ioat_intr_quirk(struct ioatdma_device *ioat_dma)
{
struct dma_device *dma;
struct dma_chan *c;
ioat_dma->enumerate_channels = ioat_enumerate_channels;
ioat_dma->reset_hw = ioat_reset_hw;
ioat_dma->self_test = ioat3_dma_self_test;
- ioat_dma->intr_quirk = ioat3_intr_quirk;
+ ioat_dma->intr_quirk = ioat_intr_quirk;
dma = &ioat_dma->dma_dev;
dma->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock;
dma->device_issue_pending = ioat_issue_pending;
ioat_kobject_add(ioat_dma, &ioat_ktype);
if (dca)
- ioat_dma->dca = ioat3_dca_init(pdev, ioat_dma->reg_base);
+ ioat_dma->dca = ioat_dca_init(pdev, ioat_dma->reg_base);
return 0;
}
projects / cascardo / linux.git / commitdiff