Take care of a bunch of little code nits in ioatdma files
Signed-off-by: Shannon Nelson <[email protected]>
Acked-by: David S. Miller <[email protected]>
---
drivers/dma/ioat_dma.c | 200 +++++++++++++++++++++++++++---------------------
1 files changed, 111 insertions(+), 89 deletions(-)
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index 55227d4..9a4d154 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -1,10 +1,10 @@
/*
- * Copyright(c) 2004 - 2006 Intel Corporation. All rights reserved.
+ * Intel I/OAT DMA Linux driver
+ * Copyright(c) 2004 - 2007 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
+ * 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
@@ -12,11 +12,12 @@
* more details.
*
* You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
*
- * The full GNU General Public License is included in this distribution in the
- * file called COPYING.
*/
/*
@@ -35,17 +36,22 @@
#include "ioatdma_registers.h"
#include "ioatdma_hw.h"
+#define INITIAL_IOAT_DESC_COUNT 128
+
#define to_ioat_chan(chan) container_of(chan, struct ioat_dma_chan, common)
#define to_ioat_device(dev) container_of(dev, struct ioat_device, common)
#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, async_tx)
/* internal functions */
-static int __devinit ioat_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan);
+static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *ioat_chan);
+static int __devinit ioat_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent);
static void ioat_shutdown(struct pci_dev *pdev);
static void __devexit ioat_remove(struct pci_dev *pdev);
-static int enumerate_dma_channels(struct ioat_device *device)
+static int ioat_dma_enumerate_channels(struct ioat_device *device)
{
u8 xfercap_scale;
u32 xfercap;
@@ -73,13 +79,14 @@ static int enumerate_dma_channels(struct ioat_device *device)
/* This should be made common somewhere in dmaengine.c */
ioat_chan->common.device = &device->common;
list_add_tail(&ioat_chan->common.device_node,
- &device->common.channels);
+ &device->common.channels);
}
return device->common.chancnt;
}
-static void
-ioat_set_src(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index)
+static void ioat_set_src(dma_addr_t addr,
+ struct dma_async_tx_descriptor *tx,
+ int index)
{
struct ioat_desc_sw *iter, *desc = tx_to_ioat_desc(tx);
struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan);
@@ -93,8 +100,9 @@ ioat_set_src(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index)
}
-static void
-ioat_set_dest(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index)
+static void ioat_set_dest(dma_addr_t addr,
+ struct dma_async_tx_descriptor *tx,
+ int index)
{
struct ioat_desc_sw *iter, *desc = tx_to_ioat_desc(tx);
struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan);
@@ -107,8 +115,7 @@ ioat_set_dest(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index)
}
}
-static dma_cookie_t
-ioat_tx_submit(struct dma_async_tx_descriptor *tx)
+static dma_cookie_t ioat_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan);
struct ioat_desc_sw *desc = tx_to_ioat_desc(tx);
@@ -141,13 +148,13 @@ ioat_tx_submit(struct dma_async_tx_descriptor *tx)
if (append)
writeb(IOAT_CHANCMD_APPEND,
ioat_chan->reg_base + IOAT_CHANCMD_OFFSET);
-
+
return cookie;
}
static struct ioat_desc_sw *ioat_dma_alloc_descriptor(
- struct ioat_dma_chan *ioat_chan,
- gfp_t flags)
+ struct ioat_dma_chan *ioat_chan,
+ gfp_t flags)
{
struct ioat_dma_descriptor *desc;
struct ioat_desc_sw *desc_sw;
@@ -177,10 +184,6 @@ static struct ioat_desc_sw *ioat_dma_alloc_descriptor(
return desc_sw;
}
-#define INITIAL_IOAT_DESC_COUNT 128
-
-static void ioat_start_null_desc(struct ioat_dma_chan *ioat_chan);
-
/* returns the actual number of allocated descriptors */
static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
{
@@ -199,16 +202,17 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
if (chanctrl & IOAT_CHANCTRL_CHANNEL_IN_USE)
return -EBUSY;
- /* Setup register to interrupt and write completion status on error */
+ /* Setup register to interrupt and write completion status on error */
chanctrl = IOAT_CHANCTRL_CHANNEL_IN_USE |
IOAT_CHANCTRL_ERR_INT_EN |
IOAT_CHANCTRL_ANY_ERR_ABORT_EN |
IOAT_CHANCTRL_ERR_COMPLETION_EN;
- writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
+ writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
if (chanerr) {
- printk("IOAT: CHANERR = %x, clearing\n", chanerr);
+ dev_err(&ioat_chan->device->pdev->dev,
+ "ioatdma: CHANERR = %x, clearing\n", chanerr);
writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
}
@@ -216,7 +220,8 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
for (i = 0; i < INITIAL_IOAT_DESC_COUNT; i++) {
desc = ioat_dma_alloc_descriptor(ioat_chan, GFP_KERNEL);
if (!desc) {
- printk(KERN_ERR "IOAT: Only %d initial descriptors\n", i);
+ dev_err(&ioat_chan->device->pdev->dev,
+ "ioatdma: Only %d initial descriptors\n", i);
break;
}
list_add_tail(&desc->node, &tmp_list);
@@ -229,8 +234,8 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
ioat_chan->completion_virt =
pci_pool_alloc(ioat_chan->device->completion_pool,
- GFP_KERNEL,
- &ioat_chan->completion_addr);
+ GFP_KERNEL,
+ &ioat_chan->completion_addr);
memset(ioat_chan->completion_virt, 0,
sizeof(*ioat_chan->completion_virt));
writel(((u64) ioat_chan->completion_addr) & 0x00000000FFFFFFFF,
@@ -238,12 +243,10 @@ static int ioat_dma_alloc_chan_resources(struct dma_chan *chan)
writel(((u64) ioat_chan->completion_addr) >> 32,
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);
- ioat_start_null_desc(ioat_chan);
+ ioat_dma_start_null_desc(ioat_chan);
return i;
}
-static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *ioat_chan);
-
static void ioat_dma_free_chan_resources(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
@@ -273,12 +276,13 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
spin_unlock_bh(&ioat_chan->desc_lock);
pci_pool_free(ioat_device->completion_pool,
- ioat_chan->completion_virt,
- ioat_chan->completion_addr);
+ ioat_chan->completion_virt,
+ ioat_chan->completion_addr);
/* one is ok since we left it on there on purpose */
if (in_use_descs > 1)
- printk(KERN_ERR "IOAT: Freeing %d in use descriptors!\n",
+ dev_err(&ioat_chan->device->pdev->dev,
+ "ioatdma: Freeing %d in use descriptors!\n",
in_use_descs - 1);
ioat_chan->last_completion = ioat_chan->completion_addr = 0;
@@ -289,8 +293,10 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan)
writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
}
-static struct dma_async_tx_descriptor *
-ioat_dma_prep_memcpy(struct dma_chan *chan, size_t len, int int_en)
+static struct dma_async_tx_descriptor *ioat_dma_prep_memcpy(
+ struct dma_chan *chan,
+ size_t len,
+ int int_en)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
struct ioat_desc_sw *first, *prev, *new;
@@ -353,12 +359,11 @@ ioat_dma_prep_memcpy(struct dma_chan *chan, size_t len, int int_en)
return new ? &new->async_tx : NULL;
}
-
/**
- * ioat_dma_memcpy_issue_pending - push potentially unrecognized appended descriptors to hw
+ * ioat_dma_memcpy_issue_pending - push potentially unrecognized appended
+ * descriptors to hw
* @chan: DMA channel handle
*/
-
static void ioat_dma_memcpy_issue_pending(struct dma_chan *chan)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
@@ -370,15 +375,15 @@ static void ioat_dma_memcpy_issue_pending(struct dma_chan *chan)
}
}
-static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan)
+static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *ioat_chan)
{
unsigned long phys_complete;
struct ioat_desc_sw *desc, *_desc;
dma_cookie_t cookie = 0;
- prefetch(chan->completion_virt);
+ prefetch(ioat_chan->completion_virt);
- if (!spin_trylock(&chan->cleanup_lock))
+ if (!spin_trylock(&ioat_chan->cleanup_lock))
return;
/* The completion writeback can happen at any time,
@@ -388,26 +393,27 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan)
#if (BITS_PER_LONG == 64)
phys_complete =
- chan->completion_virt->full & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR;
+ ioat_chan->completion_virt->full & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_ADDR;
#else
- phys_complete = chan->completion_virt->low & IOAT_LOW_COMPLETION_MASK;
+ phys_complete = ioat_chan->completion_virt->low & IOAT_LOW_COMPLETION_MASK;
#endif
- if ((chan->completion_virt->full & IOAT_CHANSTS_DMA_TRANSFER_STATUS) ==
- IOAT_CHANSTS_DMA_TRANSFER_STATUS_HALTED) {
- printk("IOAT: Channel halted, chanerr = %x\n",
- readl(chan->reg_base + IOAT_CHANERR_OFFSET));
+ if ((ioat_chan->completion_virt->full & IOAT_CHANSTS_DMA_TRANSFER_STATUS) ==
+ IOAT_CHANSTS_DMA_TRANSFER_STATUS_HALTED) {
+ dev_err(&ioat_chan->device->pdev->dev,
+ "ioatdma: Channel halted, chanerr = %x\n",
+ readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET));
/* TODO do something to salvage the situation */
}
- if (phys_complete == chan->last_completion) {
- spin_unlock(&chan->cleanup_lock);
+ if (phys_complete == ioat_chan->last_completion) {
+ spin_unlock(&ioat_chan->cleanup_lock);
return;
}
- spin_lock_bh(&chan->desc_lock);
- list_for_each_entry_safe(desc, _desc, &chan->used_desc, node) {
+ spin_lock_bh(&ioat_chan->desc_lock);
+ list_for_each_entry_safe(desc, _desc, &ioat_chan->used_desc, node) {
/*
* Incoming DMA requests may use multiple descriptors, due to
@@ -417,31 +423,36 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan)
if (desc->async_tx.cookie) {
cookie = desc->async_tx.cookie;
- /* yes we are unmapping both _page and _single alloc'd
- regions with unmap_page. Is this *really* that bad?
- */
- pci_unmap_page(chan->device->pdev,
+ /*
+ * yes we are unmapping both _page and _single alloc'd
+ * regions with unmap_page. Is this *really* that bad?
+ */
+ pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, dst),
pci_unmap_len(desc, len),
PCI_DMA_FROMDEVICE);
- pci_unmap_page(chan->device->pdev,
+ pci_unmap_page(ioat_chan->device->pdev,
pci_unmap_addr(desc, src),
pci_unmap_len(desc, len),
PCI_DMA_TODEVICE);
}
if (desc->async_tx.phys != phys_complete) {
- /* a completed entry, but not the last, so cleanup
+ /*
+ * a completed entry, but not the last, so cleanup
* if the client is done with the descriptor
*/
if (desc->async_tx.ack) {
list_del(&desc->node);
- list_add_tail(&desc->node, &chan->free_desc);
+ list_add_tail(&desc->node,
+ &ioat_chan->free_desc);
} else
desc->async_tx.cookie = 0;
} else {
- /* last used desc. Do not remove, so we can append from
- it, but don't look at it next time, either */
+ /*
+ * last used desc. Do not remove, so we can append from
+ * it, but don't look at it next time, either
+ */
desc->async_tx.cookie = 0;
/* TODO check status bits? */
@@ -449,13 +460,13 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan)
}
}
- spin_unlock_bh(&chan->desc_lock);
+ spin_unlock_bh(&ioat_chan->desc_lock);
- chan->last_completion = phys_complete;
+ ioat_chan->last_completion = phys_complete;
if (cookie != 0)
- chan->completed_cookie = cookie;
+ ioat_chan->completed_cookie = cookie;
- spin_unlock(&chan->cleanup_lock);
+ spin_unlock(&ioat_chan->cleanup_lock);
}
static void ioat_dma_dependency_added(struct dma_chan *chan)
@@ -476,11 +487,10 @@ static void ioat_dma_dependency_added(struct dma_chan *chan)
* @done: if not %NULL, updated with last completed transaction
* @used: if not %NULL, updated with last used transaction
*/
-
static enum dma_status ioat_dma_is_complete(struct dma_chan *chan,
- dma_cookie_t cookie,
- dma_cookie_t *done,
- dma_cookie_t *used)
+ dma_cookie_t cookie,
+ dma_cookie_t *done,
+ dma_cookie_t *used)
{
struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan);
dma_cookie_t last_used;
@@ -491,7 +501,7 @@ static enum dma_status ioat_dma_is_complete(struct dma_chan *chan,
last_complete = ioat_chan->completed_cookie;
if (done)
- *done= last_complete;
+ *done = last_complete;
if (used)
*used = last_used;
@@ -505,7 +515,7 @@ static enum dma_status ioat_dma_is_complete(struct dma_chan *chan,
last_complete = ioat_chan->completed_cookie;
if (done)
- *done= last_complete;
+ *done = last_complete;
if (used)
*used = last_used;
@@ -548,13 +558,13 @@ static irqreturn_t ioat_do_interrupt(int irq, void *data)
attnstatus = readl(instance->reg_base + IOAT_ATTNSTATUS_OFFSET);
- printk(KERN_ERR "ioatdma error: interrupt! status %lx\n", attnstatus);
+ printk(KERN_ERR "ioatdma: interrupt! status %lx\n", attnstatus);
writeb(intrctrl, instance->reg_base + IOAT_INTRCTRL_OFFSET);
return IRQ_HANDLED;
}
-static void ioat_start_null_desc(struct ioat_dma_chan *ioat_chan)
+static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan)
{
struct ioat_desc_sw *desc;
@@ -618,9 +628,11 @@ static int ioat_self_test(struct ioat_device *device)
/* Start copy, using first DMA channel */
dma_chan = container_of(device->common.channels.next,
- struct dma_chan,
- device_node);
+ struct dma_chan,
+ device_node);
if (ioat_dma_alloc_chan_resources(dma_chan) < 1) {
+ dev_err(&device->pdev->dev,
+ "selftest cannot allocate chan resource\n");
err = -ENODEV;
goto out;
}
@@ -638,12 +650,14 @@ static int ioat_self_test(struct ioat_device *device)
msleep(1);
if (ioat_dma_is_complete(dma_chan, cookie, NULL, NULL) != DMA_SUCCESS) {
- printk(KERN_ERR "ioatdma: Self-test copy timed out, disabling\n");
+ dev_err(&device->pdev->dev,
+ "ioatdma: Self-test copy timed out, disabling\n");
err = -ENODEV;
goto free_resources;
}
if (memcmp(src, dest, IOAT_TEST_SIZE)) {
- printk(KERN_ERR "ioatdma: Self-test copy failed compare, disabling\n");
+ dev_err(&device->pdev->dev,
+ "ioatdma: Self-test copy failed compare, disabling\n");
err = -ENODEV;
goto free_resources;
}
@@ -657,7 +671,7 @@ out:
}
static int __devinit ioat_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
+ const struct pci_device_id *ent)
{
int err;
unsigned long mmio_start, mmio_len;
@@ -701,7 +715,9 @@ static int __devinit ioat_probe(struct pci_dev *pdev,
goto err_dma_pool;
}
- device->completion_pool = pci_pool_create("completion_pool", pdev, sizeof(u64), SMP_CACHE_BYTES, SMP_CACHE_BYTES);
+ device->completion_pool = pci_pool_create("completion_pool", pdev,
+ sizeof(u64), SMP_CACHE_BYTES,
+ SMP_CACHE_BYTES);
if (!device->completion_pool) {
err = -ENOMEM;
goto err_completion_pool;
@@ -723,22 +739,26 @@ static int __devinit ioat_probe(struct pci_dev *pdev,
device->reg_base = reg_base;
- writeb(IOAT_INTRCTRL_MASTER_INT_EN, device->reg_base + IOAT_INTRCTRL_OFFSET);
+ writeb(IOAT_INTRCTRL_MASTER_INT_EN,
+ device->reg_base + IOAT_INTRCTRL_OFFSET);
pci_set_master(pdev);
INIT_LIST_HEAD(&device->common.channels);
- enumerate_dma_channels(device);
+ ioat_dma_enumerate_channels(device);
dma_cap_set(DMA_MEMCPY, device->common.cap_mask);
- device->common.device_alloc_chan_resources = ioat_dma_alloc_chan_resources;
- device->common.device_free_chan_resources = ioat_dma_free_chan_resources;
+ device->common.device_alloc_chan_resources =
+ ioat_dma_alloc_chan_resources;
+ device->common.device_free_chan_resources =
+ ioat_dma_free_chan_resources;
device->common.device_prep_dma_memcpy = ioat_dma_prep_memcpy;
device->common.device_is_tx_complete = ioat_dma_is_complete;
device->common.device_issue_pending = ioat_dma_memcpy_issue_pending;
device->common.device_dependency_added = ioat_dma_dependency_added;
device->common.dev = &pdev->dev;
- printk(KERN_INFO "Intel(R) I/OAT DMA Engine found, %d channels\n",
- device->common.chancnt);
+ printk(KERN_INFO " "
+ "ioatdma: Intel(R) I/OAT DMA Engine found, %d channels\n",
+ device->common.chancnt);
err = ioat_self_test(device);
if (err)
@@ -764,7 +784,8 @@ err_set_dma_mask:
pci_disable_device(pdev);
err_enable_device:
- printk(KERN_ERR "Intel(R) I/OAT DMA Engine initialization failed\n");
+ printk(KERN_INFO " "
+ "ioatdma: Intel(R) I/OAT DMA Engine initialization failed\n");
return err;
}
@@ -796,7 +817,8 @@ static void __devexit ioat_remove(struct pci_dev *pdev)
iounmap(device->reg_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
- list_for_each_entry_safe(chan, _chan, &device->common.channels, device_node) {
+ list_for_each_entry_safe(chan, _chan,
+ &device->common.channels, device_node) {
ioat_chan = to_ioat_chan(chan);
list_del(&chan->device_node);
kfree(ioat_chan);
-
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