[PATCH 06/17] lib82596: move DMA allocation into the callers of i82596_probe

Christoph Hellwig
2020-09-14T15:02:36Z

This allows us to get rid of the LIB82596_DMA_ATTR defined and prepare
for untangling the coherent vs non-coherent DMA allocation API.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/net/ethernet/i825xx/lasi_82596.c | 24 ++++++++++------
drivers/net/ethernet/i825xx/lib82596.c | 36 ++++++++----------------
drivers/net/ethernet/i825xx/sni_82596.c | 19 +++++++++----
3 files changed, 40 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/i825xx/lasi_82596.c b/drivers/net/ethernet/i825xx/lasi_82596.c
index aec7e98bcc853a..a12218e940a2fa 100644
--- a/drivers/net/ethernet/i825xx/lasi_82596.c
+++ b/drivers/net/ethernet/i825xx/lasi_82596.c
@@ -96,8 +96,6 @@

#define OPT_SWAP_PORT 0x0001 /* Need to wordswp on the MPU port */

-#define LIB82596_DMA_ATTR DMA_ATTR_NON_CONSISTENT
-
#define DMA_WBACK(ndev, addr, len) \
do { dma_cache_sync((ndev)->dev.parent, (void *)addr, len, DMA_TO_DEVICE); } while (0)

@@ -155,7 +153,7 @@ lan_init_chip(struct parisc_device *dev)
{
struct net_device *netdevice;
struct i596_private *lp;
- int retval;
+ int retval = -ENOMEM;
int i;

if (!dev->irq) {
@@ -186,12 +184,22 @@ lan_init_chip(struct parisc_device *dev)

lp = netdev_priv(netdevice);
lp->options = dev->id.sversion == 0x72 ? OPT_SWAP_PORT : 0;
+ lp->dma = dma_alloc_attrs(&dev->dev, sizeof(struct i596_dma),
+ &lp->dma_addr, GFP_KERNEL,
+ DMA_ATTR_NON_CONSISTENT);
+ if (!lp->dma)
+ goto out_free_netdev;

retval = i82596_probe(netdevice);
- if (retval) {
- free_netdev(netdevice);
- return -ENODEV;
- }
+ if (retval)
+ goto out_free_dma;
+ return 0;
+
+out_free_dma:
+ dma_free_attrs(&dev->dev, sizeof(struct i596_dma), lp->dma,
+ lp->dma_addr, DMA_ATTR_NON_CONSISTENT);
+out_free_netdev:
+ free_netdev(netdevice);
return retval;
}

@@ -202,7 +210,7 @@ static int __exit lan_remove_chip(struct parisc_device *pdev)

unregister_netdev (dev);
dma_free_attrs(&pdev->dev, sizeof(struct i596_private), lp->dma,
- lp->dma_addr, LIB82596_DMA_ATTR);
+ lp->dma_addr, DMA_ATTR_NON_CONSISTENT);
free_netdev (dev);
return 0;
}
diff --git a/drivers/net/ethernet/i825xx/lib82596.c b/drivers/net/ethernet/i825xx/lib82596.c
index b03757e169e475..b4e4b3eb5758b5 100644
--- a/drivers/net/ethernet/i825xx/lib82596.c
+++ b/drivers/net/ethernet/i825xx/lib82596.c
@@ -1047,9 +1047,8 @@ static const struct net_device_ops i596_netdev_ops = {

static int i82596_probe(struct net_device *dev)
{
- int i;
struct i596_private *lp = netdev_priv(dev);
- struct i596_dma *dma;
+ int ret;

/* This lot is ensure things have been cache line aligned. */
BUILD_BUG_ON(sizeof(struct i596_rfd) != 32);
@@ -1063,41 +1062,28 @@ static int i82596_probe(struct net_device *dev)
if (!dev->base_addr || !dev->irq)
return -ENODEV;

- dma = dma_alloc_attrs(dev->dev.parent, sizeof(struct i596_dma),
- &lp->dma_addr, GFP_KERNEL,
- LIB82596_DMA_ATTR);
- if (!dma) {
- printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__);
- return -ENOMEM;
- }
-
dev->netdev_ops = &i596_netdev_ops;
dev->watchdog_timeo = TX_TIMEOUT;

- memset(dma, 0, sizeof(struct i596_dma));
- lp->dma = dma;
-
- dma->scb.command = 0;
- dma->scb.cmd = I596_NULL;
- dma->scb.rfd = I596_NULL;
+ memset(lp->dma, 0, sizeof(struct i596_dma));
+ lp->dma->scb.command = 0;
+ lp->dma->scb.cmd = I596_NULL;
+ lp->dma->scb.rfd = I596_NULL;
spin_lock_init(&lp->lock);

- DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma));
+ DMA_WBACK_INV(dev, lp->dma, sizeof(struct i596_dma));

- i = register_netdev(dev);
- if (i) {
- dma_free_attrs(dev->dev.parent, sizeof(struct i596_dma),
- dma, lp->dma_addr, LIB82596_DMA_ATTR);
- return i;
- }
+ ret = register_netdev(dev);
+ if (ret)
+ return ret;

DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n",
dev->name, dev->base_addr, dev->dev_addr,
dev->irq));
DEB(DEB_INIT, printk(KERN_INFO
"%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n",
- dev->name, dma, (int)sizeof(struct i596_dma),
- &dma->scb));
+ dev->name, lp->dma, (int)sizeof(struct i596_dma),
+ &lp->dma->scb));

return 0;
}
diff --git a/drivers/net/ethernet/i825xx/sni_82596.c b/drivers/net/ethernet/i825xx/sni_82596.c
index 22f5887578b2bd..4b9ac0c6557731 100644
--- a/drivers/net/ethernet/i825xx/sni_82596.c
+++ b/drivers/net/ethernet/i825xx/sni_82596.c
@@ -24,8 +24,6 @@

static const char sni_82596_string[] = "snirm_82596";

-#define LIB82596_DMA_ATTR 0
-
#define DMA_WBACK(priv, addr, len) do { } while (0)
#define DMA_INV(priv, addr, len) do { } while (0)
#define DMA_WBACK_INV(priv, addr, len) do { } while (0)
@@ -134,10 +132,19 @@ static int sni_82596_probe(struct platform_device *dev)
lp->ca = ca_addr;
lp->mpu_port = mpu_addr;

+ lp->dma = dma_alloc_coherent(&dev->dev, sizeof(struct i596_dma),
+ &lp->dma_addr, GFP_KERNEL);
+ if (!lp->dma)
+ goto probe_failed;
+
retval = i82596_probe(netdevice);
- if (retval == 0)
- return 0;
+ if (retval)
+ goto probe_failed_free_dma;
+ return 0;

+probe_failed_free_dma:
+ dma_free_coherent(&dev->dev, sizeof(struct i596_dma), lp->dma,
+ lp->dma_addr);
probe_failed:
free_netdev(netdevice);
probe_failed_free_ca:
@@ -153,8 +160,8 @@ static int sni_82596_driver_remove(struct platform_device *pdev)
struct i596_private *lp = netdev_priv(dev);

unregister_netdev(dev);
- dma_free_attrs(dev->dev.parent, sizeof(struct i596_private), lp->dma,
- lp->dma_addr, LIB82596_DMA_ATTR);
+ dma_free_coherent(&pdev->dev, sizeof(struct i596_private), lp->dma,
+ lp->dma_addr);
iounmap(lp->ca);
iounmap(lp->mpu_port);
free_netdev (dev);
--
2.28.0