[ATM]: zatm: mailbox converted to pci_alloc_consistent()
mailbox converted to pci_alloc_consistent()
- request_region() is not needed: zatm_init_one() issues
pci_request_regions();
- the warning related to kfree(zatm_dev->mbx_start) disappears;
Compiled with i386 and sparc64 as target.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/zatm.c b/drivers/atm/zatm.c
index afcf1ad..a2b236a 100644
--- a/drivers/atm/zatm.c
+++ b/drivers/atm/zatm.c
@@ -16,9 +16,9 @@
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/delay.h>
-#include <linux/ioport.h> /* for request_region */
#include <linux/uio.h>
#include <linux/init.h>
+#include <linux/dma-mapping.h>
#include <linux/atm_zatm.h>
#include <linux/capability.h>
#include <linux/bitops.h>
@@ -1257,22 +1257,22 @@
static int __init zatm_start(struct atm_dev *dev)
{
- struct zatm_dev *zatm_dev;
+ struct zatm_dev *zatm_dev = ZATM_DEV(dev);
+ struct pci_dev *pdev = zatm_dev->pci_dev;
unsigned long curr;
int pools,vccs,rx;
- int error,i,ld;
+ int error, i, ld;
DPRINTK("zatm_start\n");
- zatm_dev = ZATM_DEV(dev);
zatm_dev->rx_map = zatm_dev->tx_map = NULL;
- for (i = 0; i < NR_MBX; i++)
- zatm_dev->mbx_start[i] = 0;
- if (request_irq(zatm_dev->irq,&zatm_int,SA_SHIRQ,DEV_LABEL,dev)) {
- printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
- dev->number,zatm_dev->irq);
- return -EAGAIN;
+ for (i = 0; i < NR_MBX; i++)
+ zatm_dev->mbx_start[i] = 0;
+ error = request_irq(zatm_dev->irq, zatm_int, SA_SHIRQ, DEV_LABEL, dev);
+ if (error < 0) {
+ printk(KERN_ERR DEV_LABEL "(itf %d): IRQ%d is already in use\n",
+ dev->number,zatm_dev->irq);
+ goto done;
}
- request_region(zatm_dev->base,uPD98401_PORTS,DEV_LABEL);
/* define memory regions */
pools = NR_POOLS;
if (NR_SHAPERS*SHAPER_SIZE > pools*POOL_SIZE)
@@ -1299,51 +1299,66 @@
"%ld VCs\n",dev->number,NR_SHAPERS,pools,rx,
(zatm_dev->mem-curr*4)/VC_SIZE);
/* create mailboxes */
- for (i = 0; i < NR_MBX; i++)
- if (mbx_entries[i]) {
- unsigned long here;
+ for (i = 0; i < NR_MBX; i++) {
+ void *mbx;
+ dma_addr_t mbx_dma;
- here = (unsigned long) kmalloc(2*MBX_SIZE(i),
- GFP_KERNEL);
- if (!here) {
- error = -ENOMEM;
- goto out;
- }
- if ((here^(here+MBX_SIZE(i))) & ~0xffffUL)/* paranoia */
- here = (here & ~0xffffUL)+0x10000;
- zatm_dev->mbx_start[i] = here;
- if ((here^virt_to_bus((void *) here)) & 0xffff) {
- printk(KERN_ERR DEV_LABEL "(itf %d): system "
- "bus incompatible with driver\n",
- dev->number);
- error = -ENODEV;
- goto out;
- }
- DPRINTK("mbx@0x%08lx-0x%08lx\n",here,here+MBX_SIZE(i));
- zatm_dev->mbx_end[i] = (here+MBX_SIZE(i)) & 0xffff;
- zout(virt_to_bus((void *) here) >> 16,MSH(i));
- zout(virt_to_bus((void *) here),MSL(i));
- zout((here+MBX_SIZE(i)) & 0xffff,MBA(i));
- zout(here & 0xffff,MTA(i));
- zout(here & 0xffff,MWA(i));
+ if (!mbx_entries[i])
+ continue;
+ mbx = pci_alloc_consistent(pdev, 2*MBX_SIZE(i), &mbx_dma);
+ if (!mbx) {
+ error = -ENOMEM;
+ goto out;
}
+ /*
+ * Alignment provided by pci_alloc_consistent() isn't enough
+ * for this device.
+ */
+ if (((unsigned long)mbx ^ mbx_dma) & 0xffff) {
+ printk(KERN_ERR DEV_LABEL "(itf %d): system "
+ "bus incompatible with driver\n", dev->number);
+ pci_free_consistent(pdev, 2*MBX_SIZE(i), mbx, mbx_dma);
+ error = -ENODEV;
+ goto out;
+ }
+ DPRINTK("mbx@0x%08lx-0x%08lx\n", mbx, mbx + MBX_SIZE(i));
+ zatm_dev->mbx_start[i] = (unsigned long)mbx;
+ zatm_dev->mbx_dma[i] = mbx_dma;
+ zatm_dev->mbx_end[i] = (zatm_dev->mbx_start[i] + MBX_SIZE(i)) &
+ 0xffff;
+ zout(mbx_dma >> 16, MSH(i));
+ zout(mbx_dma, MSL(i));
+ zout(zatm_dev->mbx_end[i], MBA(i));
+ zout((unsigned long)mbx & 0xffff, MTA(i));
+ zout((unsigned long)mbx & 0xffff, MWA(i));
+ }
error = start_tx(dev);
- if (error) goto out;
+ if (error)
+ goto out;
error = start_rx(dev);
- if (error) goto out;
+ if (error)
+ goto out_tx;
error = dev->phy->start(dev);
- if (error) goto out;
+ if (error)
+ goto out_rx;
zout(0xffffffff,IMR); /* enable interrupts */
/* enable TX & RX */
zout(zin(GMR) | uPD98401_GMR_SE | uPD98401_GMR_RE,GMR);
- return 0;
- out:
- for (i = 0; i < NR_MBX; i++)
- kfree(&zatm_dev->mbx_start[i]);
- kfree(zatm_dev->rx_map);
- kfree(zatm_dev->tx_map);
- free_irq(zatm_dev->irq, dev);
+done:
return error;
+
+out_rx:
+ kfree(zatm_dev->rx_map);
+out_tx:
+ kfree(zatm_dev->tx_map);
+out:
+ while (i-- > 0) {
+ pci_free_consistent(pdev, 2*MBX_SIZE(i),
+ (void *)zatm_dev->mbx_start[i],
+ zatm_dev->mbx_dma[i]);
+ }
+ free_irq(zatm_dev->irq, dev);
+ goto done;
}