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/*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/delay.h>
#include <linux/fs.h>
#ifdef mips
#include <asm/paccess.h>
#endif /* mips */
#include <bcmendian.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <bcmdefs.h>
#include <osl.h>
#include <bcmutils.h>
#include <pcicfg.h>
#define OS_HANDLE_MAGIC 0x1234abcd /* Magic # to recognise osh */
#define BCM_MEM_FILENAME_LEN 24 /* Mem. filename length */
/* Global ASSERT type flag */
u32 g_assert_type;
struct osl_info *osl_attach(void *pdev, uint bustype)
{
struct osl_info *osh;
osh = kmalloc(sizeof(struct osl_info), GFP_ATOMIC);
ASSERT(osh);
memset(osh, 0, sizeof(struct osl_info));
osh->magic = OS_HANDLE_MAGIC;
osh->pdev = pdev;
osh->bustype = bustype;
switch (bustype) {
case PCI_BUS:
case SI_BUS:
case PCMCIA_BUS:
osh->mmbus = true;
break;
case JTAG_BUS:
case SDIO_BUS:
case USB_BUS:
case SPI_BUS:
case RPC_BUS:
osh->mmbus = false;
break;
default:
ASSERT(false);
break;
}
return osh;
}
void osl_detach(struct osl_info *osh)
{
if (osh == NULL)
return;
ASSERT(osh->magic == OS_HANDLE_MAGIC);
kfree(osh);
}
struct sk_buff *BCMFASTPATH pkt_buf_get_skb(struct osl_info *osh, uint len)
{
struct sk_buff *skb;
skb = dev_alloc_skb(len);
if (skb) {
skb_put(skb, len);
skb->priority = 0;
osh->pktalloced++;
}
return skb;
}
/* Free the driver packet. Free the tag if present */
void BCMFASTPATH pkt_buf_free_skb(struct osl_info *osh, struct sk_buff *skb, bool send)
{
struct sk_buff *nskb;
int nest = 0;
ASSERT(skb);
/* perversion: we use skb->next to chain multi-skb packets */
while (skb) {
nskb = skb->next;
skb->next = NULL;
if (skb->destructor)
/* cannot kfree_skb() on hard IRQ (net/core/skbuff.c) if
* destructor exists
*/
dev_kfree_skb_any(skb);
else
/* can free immediately (even in_irq()) if destructor
* does not exist
*/
dev_kfree_skb(skb);
osh->pktalloced--;
nest++;
skb = nskb;
}
}
/* return bus # for the pci device pointed by osh->pdev */
uint osl_pci_bus(struct osl_info *osh)
{
ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
return ((struct pci_dev *)osh->pdev)->bus->number;
}
/* return slot # for the pci device pointed by osh->pdev */
uint osl_pci_slot(struct osl_info *osh)
{
ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
return PCI_SLOT(((struct pci_dev *)osh->pdev)->devfn);
}
void *osl_dma_alloc_consistent(struct osl_info *osh, uint size, u16 align_bits,
uint *alloced, unsigned long *pap)
{
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
if (align_bits) {
u16 align = (1 << align_bits);
if (!IS_ALIGNED(PAGE_SIZE, align))
size += align;
*alloced = size;
}
return pci_alloc_consistent(osh->pdev, size, (dma_addr_t *) pap);
}
void osl_dma_free_consistent(struct osl_info *osh, void *va, uint size,
unsigned long pa)
{
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
pci_free_consistent(osh->pdev, size, va, (dma_addr_t) pa);
}
uint BCMFASTPATH osl_dma_map(struct osl_info *osh, void *va, uint size,
int direction)
{
int dir;
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
dir = (direction == DMA_TX) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
return pci_map_single(osh->pdev, va, size, dir);
}
void BCMFASTPATH osl_dma_unmap(struct osl_info *osh, uint pa, uint size,
int direction)
{
int dir;
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
dir = (direction == DMA_TX) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
pci_unmap_single(osh->pdev, (u32) pa, size, dir);
}
#if defined(BCMDBG_ASSERT)
void osl_assert(char *exp, char *file, int line)
{
char tempbuf[256];
char *basename;
basename = strrchr(file, '/');
/* skip the '/' */
if (basename)
basename++;
if (!basename)
basename = file;
#ifdef BCMDBG_ASSERT
snprintf(tempbuf, 256,
"assertion \"%s\" failed: file \"%s\", line %d\n", exp,
basename, line);
/* Print assert message and give it time to be written to /var/log/messages */
if (!in_interrupt()) {
const int delay = 3;
printk(KERN_ERR "%s", tempbuf);
printk(KERN_ERR "panic in %d seconds\n", delay);
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(delay * HZ);
}
switch (g_assert_type) {
case 0:
panic(KERN_ERR "%s", tempbuf);
break;
case 1:
printk(KERN_ERR "%s", tempbuf);
BUG();
break;
case 2:
printk(KERN_ERR "%s", tempbuf);
break;
default:
break;
}
#endif /* BCMDBG_ASSERT */
}
#endif /* defined(BCMDBG_ASSERT) */
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