From 6df9183a153291a2585a8dfe67597fc18c201147 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 8 Sep 2009 12:00:55 -0700 Subject: ioat: add some dev_dbg() calls Provide some output for debugging the driver. Signed-off-by: Maciej Sosnowski Signed-off-by: Dan Williams --- drivers/dma/ioat/dma_v2.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) (limited to 'drivers/dma/ioat/dma_v2.c') diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c index 49ba1c73d95..58881860f40 100644 --- a/drivers/dma/ioat/dma_v2.c +++ b/drivers/dma/ioat/dma_v2.c @@ -54,7 +54,9 @@ static void __ioat2_issue_pending(struct ioat2_dma_chan *ioat) /* make descriptor updates globally visible before notifying channel */ wmb(); writew(ioat->dmacount, reg_base + IOAT_CHAN_DMACOUNT_OFFSET); - + dev_dbg(to_dev(&ioat->base), + "%s: head: %#x tail: %#x issued: %#x count: %#x\n", + __func__, ioat->head, ioat->tail, ioat->issued, ioat->dmacount); } static void ioat2_issue_pending(struct dma_chan *chan) @@ -101,6 +103,8 @@ static void __ioat2_start_null_desc(struct ioat2_dma_chan *ioat) return; } + dev_dbg(to_dev(&ioat->base), "%s: head: %#x tail: %#x issued: %#x\n", + __func__, ioat->head, ioat->tail, ioat->issued); idx = ioat2_desc_alloc(ioat, 1); desc = ioat2_get_ring_ent(ioat, idx); @@ -118,6 +122,7 @@ static void __ioat2_start_null_desc(struct ioat2_dma_chan *ioat) reg_base + IOAT2_CHAINADDR_OFFSET_LOW); writel(((u64) desc->txd.phys) >> 32, reg_base + IOAT2_CHAINADDR_OFFSET_HIGH); + dump_desc_dbg(ioat, desc); __ioat2_issue_pending(ioat); } @@ -154,6 +159,10 @@ static void ioat2_reset_part2(struct work_struct *work) ioat->issued = ioat->tail; ioat->dmacount = 0; + dev_dbg(to_dev(&ioat->base), + "%s: head: %#x tail: %#x issued: %#x count: %#x\n", + __func__, ioat->head, ioat->tail, ioat->issued, ioat->dmacount); + if (ioat2_ring_pending(ioat)) { struct ioat_ring_ent *desc; @@ -221,6 +230,8 @@ static void ioat2_chan_watchdog(struct work_struct *work) u16 active; int i; + dev_dbg(&device->pdev->dev, "%s\n", __func__); + for (i = 0; i < device->common.chancnt; i++) { chan = ioat_chan_by_index(device, i); ioat = container_of(chan, struct ioat2_dma_chan, base); @@ -295,11 +306,15 @@ static void ioat2_cleanup(struct ioat2_dma_chan *ioat) spin_lock_bh(&ioat->ring_lock); + dev_dbg(to_dev(chan), "%s: head: %#x tail: %#x issued: %#x\n", + __func__, ioat->head, ioat->tail, ioat->issued); + active = ioat2_ring_active(ioat); for (i = 0; i < active && !seen_current; i++) { prefetch(ioat2_get_ring_ent(ioat, ioat->tail + i + 1)); desc = ioat2_get_ring_ent(ioat, ioat->tail + i); tx = &desc->txd; + dump_desc_dbg(ioat, desc); if (tx->cookie) { ioat_dma_unmap(chan, tx->flags, desc->len, desc->hw); chan->completed_cookie = tx->cookie; @@ -348,6 +363,7 @@ static int ioat2_enumerate_channels(struct ioatdma_device *device) xfercap_log = readb(device->reg_base + IOAT_XFERCAP_OFFSET); if (xfercap_log == 0) return 0; + dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); /* FIXME which i/oat version is i7300? */ #ifdef CONFIG_I7300_IDLE_IOAT_CHANNEL @@ -381,6 +397,8 @@ static dma_cookie_t ioat2_tx_submit_unlock(struct dma_async_tx_descriptor *tx) cookie = 1; tx->cookie = cookie; c->cookie = cookie; + dev_dbg(to_dev(&ioat->base), "%s: cookie: %d\n", __func__, cookie); + ioat2_update_pending(ioat); spin_unlock_bh(&ioat->ring_lock); @@ -480,6 +498,7 @@ static int ioat2_alloc_chan_resources(struct dma_chan *c) kfree(ring); return -ENOMEM; } + set_desc_id(ring[i], i); } /* link descs */ @@ -571,12 +590,14 @@ ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, len -= copy; dst += copy; src += copy; + dump_desc_dbg(ioat, desc); } desc->txd.flags = flags; desc->len = total_len; hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); hw->ctl_f.compl_write = 1; + dump_desc_dbg(ioat, desc); /* we leave the channel locked to ensure in order submission */ return &desc->txd; @@ -614,6 +635,7 @@ static void ioat2_free_chan_resources(struct dma_chan *c) spin_lock_bh(&ioat->ring_lock); descs = ioat2_ring_space(ioat); + dev_dbg(to_dev(chan), "freeing %d idle descriptors\n", descs); for (i = 0; i < descs; i++) { desc = ioat2_get_ring_ent(ioat, ioat->head + i); ioat2_free_ring_ent(desc, c); @@ -625,6 +647,7 @@ static void ioat2_free_chan_resources(struct dma_chan *c) for (i = 0; i < total_descs - descs; i++) { desc = ioat2_get_ring_ent(ioat, ioat->tail + i); + dump_desc_dbg(ioat, desc); ioat2_free_ring_ent(desc, c); } -- cgit v1.2.3