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linux_osl.c
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/*
* Linux OS Independent Layer
*
* Copyright (C) 1999-2013, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id: linux_osl.c 386346 2013-02-20 08:51:53Z $
*/
#define LINUX_PORT
#include <typedefs.h>
#include <bcmendian.h>
#include <linuxver.h>
#include <bcmdefs.h>
#include <osl.h>
#include <bcmutils.h>
#include <linux/delay.h>
#include <pcicfg.h>
#include <linux/fs.h>
#define PCI_CFG_RETRY 10
#define OS_HANDLE_MAGIC 0x1234abcd /* Magic # to recognize osh */
#define BCM_MEM_FILENAME_LEN 24 /* Mem. filename length */
#ifdef CONFIG_DHD_USE_STATIC_BUF
#define DHD_SKB_HDRSIZE 336
#define DHD_SKB_1PAGE_BUFSIZE ((PAGE_SIZE*1)-DHD_SKB_HDRSIZE)
#define DHD_SKB_2PAGE_BUFSIZE ((PAGE_SIZE*2)-DHD_SKB_HDRSIZE)
#define DHD_SKB_4PAGE_BUFSIZE ((PAGE_SIZE*4)-DHD_SKB_HDRSIZE)
#define STATIC_BUF_MAX_NUM 16
#define STATIC_BUF_SIZE (PAGE_SIZE*2)
#define STATIC_BUF_TOTAL_LEN (STATIC_BUF_MAX_NUM * STATIC_BUF_SIZE)
typedef struct bcm_static_buf {
struct semaphore static_sem;
unsigned char *buf_ptr;
unsigned char buf_use[STATIC_BUF_MAX_NUM];
} bcm_static_buf_t;
static bcm_static_buf_t *bcm_static_buf = 0;
#define STATIC_PKT_MAX_NUM 8
#if defined(ENHANCED_STATIC_BUF)
#define STATIC_PKT_4PAGE_NUM 1
#define DHD_SKB_MAX_BUFSIZE DHD_SKB_4PAGE_BUFSIZE
#else
#define STATIC_PKT_4PAGE_NUM 0
#define DHD_SKB_MAX_BUFSIZE DHD_SKB_2PAGE_BUFSIZE
#endif /* ENHANCED_STATIC_BUF */
typedef struct bcm_static_pkt {
struct sk_buff *skb_4k[STATIC_PKT_MAX_NUM];
struct sk_buff *skb_8k[STATIC_PKT_MAX_NUM];
#ifdef ENHANCED_STATIC_BUF
struct sk_buff *skb_16k;
#endif
struct semaphore osl_pkt_sem;
unsigned char pkt_use[STATIC_PKT_MAX_NUM * 2 + STATIC_PKT_4PAGE_NUM];
} bcm_static_pkt_t;
static bcm_static_pkt_t *bcm_static_skb = 0;
#endif /* CONFIG_DHD_USE_STATIC_BUF */
typedef struct bcm_mem_link {
struct bcm_mem_link *prev;
struct bcm_mem_link *next;
uint size;
int line;
void *osh;
char file[BCM_MEM_FILENAME_LEN];
} bcm_mem_link_t;
struct osl_info {
osl_pubinfo_t pub;
#ifdef CTFPOOL
ctfpool_t *ctfpool;
#endif /* CTFPOOL */
uint magic;
void *pdev;
atomic_t malloced;
atomic_t pktalloced; /* Number of allocated packet buffers */
uint failed;
uint bustype;
bcm_mem_link_t *dbgmem_list;
spinlock_t dbgmem_lock;
#ifdef BCMDBG_CTRACE
spinlock_t ctrace_lock;
struct list_head ctrace_list;
int ctrace_num;
#endif /* BCMDBG_CTRACE */
spinlock_t pktalloc_lock;
};
#define OSL_PKTTAG_CLEAR(p) \
do { \
struct sk_buff *s = (struct sk_buff *)(p); \
ASSERT(OSL_PKTTAG_SZ == 32); \
*(uint32 *)(&s->cb[0]) = 0; *(uint32 *)(&s->cb[4]) = 0; \
*(uint32 *)(&s->cb[8]) = 0; *(uint32 *)(&s->cb[12]) = 0; \
*(uint32 *)(&s->cb[16]) = 0; *(uint32 *)(&s->cb[20]) = 0; \
*(uint32 *)(&s->cb[24]) = 0; *(uint32 *)(&s->cb[28]) = 0; \
} while (0)
/* PCMCIA attribute space access macros */
/* Global ASSERT type flag */
uint32 g_assert_type = FALSE;
static int16 linuxbcmerrormap[] =
{ 0, /* 0 */
-EINVAL, /* BCME_ERROR */
-EINVAL, /* BCME_BADARG */
-EINVAL, /* BCME_BADOPTION */
-EINVAL, /* BCME_NOTUP */
-EINVAL, /* BCME_NOTDOWN */
-EINVAL, /* BCME_NOTAP */
-EINVAL, /* BCME_NOTSTA */
-EINVAL, /* BCME_BADKEYIDX */
-EINVAL, /* BCME_RADIOOFF */
-EINVAL, /* BCME_NOTBANDLOCKED */
-EINVAL, /* BCME_NOCLK */
-EINVAL, /* BCME_BADRATESET */
-EINVAL, /* BCME_BADBAND */
-E2BIG, /* BCME_BUFTOOSHORT */
-E2BIG, /* BCME_BUFTOOLONG */
-EBUSY, /* BCME_BUSY */
-EINVAL, /* BCME_NOTASSOCIATED */
-EINVAL, /* BCME_BADSSIDLEN */
-EINVAL, /* BCME_OUTOFRANGECHAN */
-EINVAL, /* BCME_BADCHAN */
-EFAULT, /* BCME_BADADDR */
-ENOMEM, /* BCME_NORESOURCE */
-EOPNOTSUPP, /* BCME_UNSUPPORTED */
-EMSGSIZE, /* BCME_BADLENGTH */
-EINVAL, /* BCME_NOTREADY */
-EPERM, /* BCME_EPERM */
-ENOMEM, /* BCME_NOMEM */
-EINVAL, /* BCME_ASSOCIATED */
-ERANGE, /* BCME_RANGE */
-EINVAL, /* BCME_NOTFOUND */
-EINVAL, /* BCME_WME_NOT_ENABLED */
-EINVAL, /* BCME_TSPEC_NOTFOUND */
-EINVAL, /* BCME_ACM_NOTSUPPORTED */
-EINVAL, /* BCME_NOT_WME_ASSOCIATION */
-EIO, /* BCME_SDIO_ERROR */
-ENODEV, /* BCME_DONGLE_DOWN */
-EINVAL, /* BCME_VERSION */
-EIO, /* BCME_TXFAIL */
-EIO, /* BCME_RXFAIL */
-ENODEV, /* BCME_NODEVICE */
-EINVAL, /* BCME_NMODE_DISABLED */
-ENODATA, /* BCME_NONRESIDENT */
-EINVAL, /* BCME_SCANREJECT */
-EINVAL, /* BCME_USAGE_ERROR */
-EIO, /* BCME_IOCTL_ERROR */
-EIO, /* BCME_SERIAL_PORT_ERR */
/* When an new error code is added to bcmutils.h, add os
* specific error translation here as well
*/
};
/* translate bcmerrors into linux errors */
int
osl_error(int bcmerror)
{
if (bcmerror > 0)
bcmerror = 0;
else if (bcmerror < BCME_LAST)
bcmerror = BCME_ERROR;
/* Array bounds covered by ASSERT in osl_attach */
return linuxbcmerrormap[-bcmerror];
}
extern uint8* dhd_os_prealloc(void *osh, int section, int size);
osl_t *
osl_attach(void *pdev, uint bustype, bool pkttag)
{
osl_t *osh;
if (!(osh = kmalloc(sizeof(osl_t), GFP_ATOMIC)))
return osh;
ASSERT(osh);
bzero(osh, sizeof(osl_t));
/* Check that error map has the right number of entries in it */
ASSERT(ABS(BCME_LAST) == (ARRAYSIZE(linuxbcmerrormap) - 1));
osh->magic = OS_HANDLE_MAGIC;
atomic_set(&osh->malloced, 0);
osh->failed = 0;
osh->dbgmem_list = NULL;
spin_lock_init(&(osh->dbgmem_lock));
osh->pdev = pdev;
osh->pub.pkttag = pkttag;
osh->bustype = bustype;
switch (bustype) {
case PCI_BUS:
case SI_BUS:
case PCMCIA_BUS:
osh->pub.mmbus = TRUE;
break;
case JTAG_BUS:
case SDIO_BUS:
case USB_BUS:
case SPI_BUS:
case RPC_BUS:
osh->pub.mmbus = FALSE;
break;
default:
ASSERT(FALSE);
break;
}
#if defined(CONFIG_DHD_USE_STATIC_BUF)
if (!bcm_static_buf) {
if (!(bcm_static_buf = (bcm_static_buf_t *)dhd_os_prealloc(osh, 3, STATIC_BUF_SIZE+
STATIC_BUF_TOTAL_LEN))) {
printk("can not alloc static buf!\n");
bcm_static_skb = NULL;
ASSERT(osh->magic == OS_HANDLE_MAGIC);
kfree(osh);
return NULL;
}
else
printk("alloc static buf at %x!\n", (unsigned int)bcm_static_buf);
sema_init(&bcm_static_buf->static_sem, 1);
bcm_static_buf->buf_ptr = (unsigned char *)bcm_static_buf + STATIC_BUF_SIZE;
}
if (!bcm_static_skb) {
int i;
void *skb_buff_ptr = 0;
bcm_static_skb = (bcm_static_pkt_t *)((char *)bcm_static_buf + 2048);
skb_buff_ptr = dhd_os_prealloc(osh, 4, 0);
if (!skb_buff_ptr) {
printk("cannot alloc static buf!\n");
bcm_static_buf = NULL;
bcm_static_skb = NULL;
ASSERT(osh->magic == OS_HANDLE_MAGIC);
kfree(osh);
return NULL;
}
bcopy(skb_buff_ptr, bcm_static_skb, sizeof(struct sk_buff *) *
(STATIC_PKT_MAX_NUM * 2 + STATIC_PKT_4PAGE_NUM));
for (i = 0; i < STATIC_PKT_MAX_NUM * 2 + STATIC_PKT_4PAGE_NUM; i++)
bcm_static_skb->pkt_use[i] = 0;
sema_init(&bcm_static_skb->osl_pkt_sem, 1);
}
#endif /* CONFIG_DHD_USE_STATIC_BUF */
#ifdef BCMDBG_CTRACE
spin_lock_init(&osh->ctrace_lock);
INIT_LIST_HEAD(&osh->ctrace_list);
osh->ctrace_num = 0;
#endif /* BCMDBG_CTRACE */
spin_lock_init(&(osh->pktalloc_lock));
return osh;
}
void
osl_detach(osl_t *osh)
{
if (osh == NULL)
return;
#ifdef CONFIG_DHD_USE_STATIC_BUF
if (bcm_static_buf) {
bcm_static_buf = 0;
}
if (bcm_static_skb) {
bcm_static_skb = 0;
}
#endif
ASSERT(osh->magic == OS_HANDLE_MAGIC);
kfree(osh);
}
static struct sk_buff *osl_alloc_skb(osl_t *osh, unsigned int len)
{
struct sk_buff *skb;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
gfp_t flags = GFP_ATOMIC;
skb = __dev_alloc_skb(len, flags);
#else
skb = dev_alloc_skb(len);
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) */
return skb;
}
#ifdef CTFPOOL
#ifdef CTFPOOL_SPINLOCK
#define CTFPOOL_LOCK(ctfpool, flags) spin_lock_irqsave(&(ctfpool)->lock, flags)
#define CTFPOOL_UNLOCK(ctfpool, flags) spin_unlock_irqrestore(&(ctfpool)->lock, flags)
#else
#define CTFPOOL_LOCK(ctfpool, flags) spin_lock_bh(&(ctfpool)->lock)
#define CTFPOOL_UNLOCK(ctfpool, flags) spin_unlock_bh(&(ctfpool)->lock)
#endif /* CTFPOOL_SPINLOCK */
/*
* Allocate and add an object to packet pool.
*/
void *
osl_ctfpool_add(osl_t *osh)
{
struct sk_buff *skb;
#ifdef CTFPOOL_SPINLOCK
unsigned long flags;
#endif /* CTFPOOL_SPINLOCK */
if ((osh == NULL) || (osh->ctfpool == NULL))
return NULL;
CTFPOOL_LOCK(osh->ctfpool, flags);
ASSERT(osh->ctfpool->curr_obj <= osh->ctfpool->max_obj);
/* No need to allocate more objects */
if (osh->ctfpool->curr_obj == osh->ctfpool->max_obj) {
CTFPOOL_UNLOCK(osh->ctfpool, flags);
return NULL;
}
/* Allocate a new skb and add it to the ctfpool */
skb = osl_alloc_skb(osh, osh->ctfpool->obj_size);
if (skb == NULL) {
printf("%s: skb alloc of len %d failed\n", __FUNCTION__,
osh->ctfpool->obj_size);
CTFPOOL_UNLOCK(osh->ctfpool, flags);
return NULL;
}
/* Add to ctfpool */
skb->next = (struct sk_buff *)osh->ctfpool->head;
osh->ctfpool->head = skb;
osh->ctfpool->fast_frees++;
osh->ctfpool->curr_obj++;
/* Hijack a skb member to store ptr to ctfpool */
CTFPOOLPTR(osh, skb) = (void *)osh->ctfpool;
/* Use bit flag to indicate skb from fast ctfpool */
PKTFAST(osh, skb) = FASTBUF;
CTFPOOL_UNLOCK(osh->ctfpool, flags);
return skb;
}
/*
* Add new objects to the pool.
*/
void
osl_ctfpool_replenish(osl_t *osh, uint thresh)
{
if ((osh == NULL) || (osh->ctfpool == NULL))
return;
/* Do nothing if no refills are required */
while ((osh->ctfpool->refills > 0) && (thresh--)) {
osl_ctfpool_add(osh);
osh->ctfpool->refills--;
}
}
/*
* Initialize the packet pool with specified number of objects.
*/
int32
osl_ctfpool_init(osl_t *osh, uint numobj, uint size)
{
osh->ctfpool = kmalloc(sizeof(ctfpool_t), GFP_ATOMIC);
ASSERT(osh->ctfpool);
bzero(osh->ctfpool, sizeof(ctfpool_t));
osh->ctfpool->max_obj = numobj;
osh->ctfpool->obj_size = size;
spin_lock_init(&osh->ctfpool->lock);
while (numobj--) {
if (!osl_ctfpool_add(osh))
return -1;
osh->ctfpool->fast_frees--;
}
return 0;
}
/*
* Cleanup the packet pool objects.
*/
void
osl_ctfpool_cleanup(osl_t *osh)
{
struct sk_buff *skb, *nskb;
#ifdef CTFPOOL_SPINLOCK
unsigned long flags;
#endif /* CTFPOOL_SPINLOCK */
if ((osh == NULL) || (osh->ctfpool == NULL))
return;
CTFPOOL_LOCK(osh->ctfpool, flags);
skb = osh->ctfpool->head;
while (skb != NULL) {
nskb = skb->next;
dev_kfree_skb(skb);
skb = nskb;
osh->ctfpool->curr_obj--;
}
ASSERT(osh->ctfpool->curr_obj == 0);
osh->ctfpool->head = NULL;
CTFPOOL_UNLOCK(osh->ctfpool, flags);
kfree(osh->ctfpool);
osh->ctfpool = NULL;
}
void
osl_ctfpool_stats(osl_t *osh, void *b)
{
struct bcmstrbuf *bb;
if ((osh == NULL) || (osh->ctfpool == NULL))
return;
#ifdef CONFIG_DHD_USE_STATIC_BUF
if (bcm_static_buf) {
bcm_static_buf = 0;
}
if (bcm_static_skb) {
bcm_static_skb = 0;
}
#endif /* CONFIG_DHD_USE_STATIC_BUF */
bb = b;
ASSERT((osh != NULL) && (bb != NULL));
bcm_bprintf(bb, "max_obj %d obj_size %d curr_obj %d refills %d\n",
osh->ctfpool->max_obj, osh->ctfpool->obj_size,
osh->ctfpool->curr_obj, osh->ctfpool->refills);
bcm_bprintf(bb, "fast_allocs %d fast_frees %d slow_allocs %d\n",
osh->ctfpool->fast_allocs, osh->ctfpool->fast_frees,
osh->ctfpool->slow_allocs);
}
static inline struct sk_buff *
osl_pktfastget(osl_t *osh, uint len)
{
struct sk_buff *skb;
#ifdef CTFPOOL_SPINLOCK
unsigned long flags;
#endif /* CTFPOOL_SPINLOCK */
/* Try to do fast allocate. Return null if ctfpool is not in use
* or if there are no items in the ctfpool.
*/
if (osh->ctfpool == NULL)
return NULL;
CTFPOOL_LOCK(osh->ctfpool, flags);
if (osh->ctfpool->head == NULL) {
ASSERT(osh->ctfpool->curr_obj == 0);
osh->ctfpool->slow_allocs++;
CTFPOOL_UNLOCK(osh->ctfpool, flags);
return NULL;
}
ASSERT(len <= osh->ctfpool->obj_size);
/* Get an object from ctfpool */
skb = (struct sk_buff *)osh->ctfpool->head;
osh->ctfpool->head = (void *)skb->next;
osh->ctfpool->fast_allocs++;
osh->ctfpool->curr_obj--;
ASSERT(CTFPOOLHEAD(osh, skb) == (struct sock *)osh->ctfpool->head);
CTFPOOL_UNLOCK(osh->ctfpool, flags);
/* Init skb struct */
skb->next = skb->prev = NULL;
#if defined(__ARM_ARCH_7A__)
skb->data = skb->head + NET_SKB_PAD;
skb->tail = skb->head + NET_SKB_PAD;
#else
skb->data = skb->head + 16;
skb->tail = skb->head + 16;
#endif /* __ARM_ARCH_7A__ */
skb->len = 0;
skb->cloned = 0;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
skb->list = NULL;
#endif
atomic_set(&skb->users, 1);
PKTSETCLINK(skb, NULL);
PKTCCLRATTR(skb);
return skb;
}
#endif /* CTFPOOL */
/* Convert a driver packet to native(OS) packet
* In the process, packettag is zeroed out before sending up
* IP code depends on skb->cb to be setup correctly with various options
* In our case, that means it should be 0
*/
struct sk_buff * BCMFASTPATH
osl_pkt_tonative(osl_t *osh, void *pkt)
{
struct sk_buff *nskb;
#ifdef BCMDBG_CTRACE
struct sk_buff *nskb1, *nskb2;
#endif
if (osh->pub.pkttag)
OSL_PKTTAG_CLEAR(pkt);
/* Decrement the packet counter */
for (nskb = (struct sk_buff *)pkt; nskb; nskb = nskb->next) {
atomic_sub(PKTISCHAINED(nskb) ? PKTCCNT(nskb) : 1, &osh->pktalloced);
#ifdef BCMDBG_CTRACE
for (nskb1 = nskb; nskb1 != NULL; nskb1 = nskb2) {
if (PKTISCHAINED(nskb1)) {
nskb2 = PKTCLINK(nskb1);
}
else
nskb2 = NULL;
DEL_CTRACE(osh, nskb1);
}
#endif /* BCMDBG_CTRACE */
}
return (struct sk_buff *)pkt;
}
/* Convert a native(OS) packet to driver packet.
* In the process, native packet is destroyed, there is no copying
* Also, a packettag is zeroed out
*/
#ifdef BCMDBG_CTRACE
void * BCMFASTPATH
osl_pkt_frmnative(osl_t *osh, void *pkt, int line, char *file)
#else
void * BCMFASTPATH
osl_pkt_frmnative(osl_t *osh, void *pkt)
#endif /* BCMDBG_CTRACE */
{
struct sk_buff *nskb;
#ifdef BCMDBG_CTRACE
struct sk_buff *nskb1, *nskb2;
#endif
if (osh->pub.pkttag)
OSL_PKTTAG_CLEAR(pkt);
/* Increment the packet counter */
for (nskb = (struct sk_buff *)pkt; nskb; nskb = nskb->next) {
atomic_add(PKTISCHAINED(nskb) ? PKTCCNT(nskb) : 1, &osh->pktalloced);
#ifdef BCMDBG_CTRACE
for (nskb1 = nskb; nskb1 != NULL; nskb1 = nskb2) {
if (PKTISCHAINED(nskb1)) {
nskb2 = PKTCLINK(nskb1);
}
else
nskb2 = NULL;
ADD_CTRACE(osh, nskb1, file, line);
}
#endif /* BCMDBG_CTRACE */
}
return (void *)pkt;
}
/* Return a new packet. zero out pkttag */
#ifdef BCMDBG_CTRACE
void * BCMFASTPATH
osl_pktget(osl_t *osh, uint len, int line, char *file)
#else
void * BCMFASTPATH
osl_pktget(osl_t *osh, uint len)
#endif /* BCMDBG_CTRACE */
{
struct sk_buff *skb;
#ifdef CTFPOOL
/* Allocate from local pool */
skb = osl_pktfastget(osh, len);
if ((skb != NULL) || ((skb = osl_alloc_skb(osh, len)) != NULL)) {
#else /* CTFPOOL */
if ((skb = osl_alloc_skb(osh, len))) {
#endif /* CTFPOOL */
skb->tail += len;
skb->len += len;
skb->priority = 0;
#ifdef BCMDBG_CTRACE
ADD_CTRACE(osh, skb, file, line);
#endif
atomic_inc(&osh->pktalloced);
}
return ((void*) skb);
}
#ifdef CTFPOOL
static inline void
osl_pktfastfree(osl_t *osh, struct sk_buff *skb)
{
ctfpool_t *ctfpool;
#ifdef CTFPOOL_SPINLOCK
unsigned long flags;
#endif /* CTFPOOL_SPINLOCK */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14)
skb->tstamp.tv.sec = 0;
#else
skb->stamp.tv_sec = 0;
#endif
/* We only need to init the fields that we change */
skb->dev = NULL;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 36)
skb->dst = NULL;
#endif
OSL_PKTTAG_CLEAR(skb);
skb->ip_summed = 0;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
skb_orphan(skb);
#else
skb->destructor = NULL;
#endif
ctfpool = (ctfpool_t *)CTFPOOLPTR(osh, skb);
ASSERT(ctfpool != NULL);
/* Add object to the ctfpool */
CTFPOOL_LOCK(ctfpool, flags);
skb->next = (struct sk_buff *)ctfpool->head;
ctfpool->head = (void *)skb;
ctfpool->fast_frees++;
ctfpool->curr_obj++;
ASSERT(ctfpool->curr_obj <= ctfpool->max_obj);
CTFPOOL_UNLOCK(ctfpool, flags);
}
#endif /* CTFPOOL */
/* Free the driver packet. Free the tag if present */
void BCMFASTPATH
osl_pktfree(osl_t *osh, void *p, bool send)
{
struct sk_buff *skb, *nskb;
skb = (struct sk_buff*) p;
if (send && osh->pub.tx_fn)
osh->pub.tx_fn(osh->pub.tx_ctx, p, 0);
PKTDBG_TRACE(osh, (void *) skb, PKTLIST_PKTFREE);
/* perversion: we use skb->next to chain multi-skb packets */
while (skb) {
nskb = skb->next;
skb->next = NULL;
#ifdef BCMDBG_CTRACE
DEL_CTRACE(osh, skb);
#endif
#ifdef CTFPOOL
if (PKTISFAST(osh, skb)) {
if (atomic_read(&skb->users) == 1)
smp_rmb();
else if (!atomic_dec_and_test(&skb->users))
goto next_skb;
osl_pktfastfree(osh, skb);
} else
#endif
{
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);
}
#ifdef CTFPOOL
next_skb:
#endif
atomic_dec(&osh->pktalloced);
skb = nskb;
}
}
#ifdef CONFIG_DHD_USE_STATIC_BUF
void*
osl_pktget_static(osl_t *osh, uint len)
{
int i = 0;
struct sk_buff *skb;
if (len > DHD_SKB_MAX_BUFSIZE) {
//printk("%s: attempt to allocate huge packet (0x%x)\n", __FUNCTION__, len);
return osl_pktget(osh, len);
}
down(&bcm_static_skb->osl_pkt_sem);
if (len <= DHD_SKB_1PAGE_BUFSIZE) {
for (i = 0; i < STATIC_PKT_MAX_NUM; i++) {
if (bcm_static_skb->pkt_use[i] == 0)
break;
}
if (i != STATIC_PKT_MAX_NUM) {
bcm_static_skb->pkt_use[i] = 1;
skb = bcm_static_skb->skb_4k[i];
skb->tail = skb->data + len;
skb->len = len;
up(&bcm_static_skb->osl_pkt_sem);
return skb;
}
}
if (len <= DHD_SKB_2PAGE_BUFSIZE) {
for (i = 0; i < STATIC_PKT_MAX_NUM; i++) {
if (bcm_static_skb->pkt_use[i + STATIC_PKT_MAX_NUM]
== 0)
break;
}
if (i != STATIC_PKT_MAX_NUM) {
bcm_static_skb->pkt_use[i + STATIC_PKT_MAX_NUM] = 1;
skb = bcm_static_skb->skb_8k[i];
skb->tail = skb->data + len;
skb->len = len;
up(&bcm_static_skb->osl_pkt_sem);
return skb;
}
}
#if defined(ENHANCED_STATIC_BUF)
if (bcm_static_skb->pkt_use[STATIC_PKT_MAX_NUM * 2] == 0) {
bcm_static_skb->pkt_use[STATIC_PKT_MAX_NUM * 2] = 1;
skb = bcm_static_skb->skb_16k;
skb->tail = skb->data + len;
skb->len = len;
up(&bcm_static_skb->osl_pkt_sem);
return skb;
}
#endif
up(&bcm_static_skb->osl_pkt_sem);
printk("%s: all static pkt in use!\n", __FUNCTION__);
return osl_pktget(osh, len);
}
void
osl_pktfree_static(osl_t *osh, void *p, bool send)
{
int i;
if (!bcm_static_skb) {
osl_pktfree(osh, p, send);
return;
}
down(&bcm_static_skb->osl_pkt_sem);
for (i = 0; i < STATIC_PKT_MAX_NUM; i++) {
if (p == bcm_static_skb->skb_4k[i]) {
bcm_static_skb->pkt_use[i] = 0;
up(&bcm_static_skb->osl_pkt_sem);
return;
}
}
for (i = 0; i < STATIC_PKT_MAX_NUM; i++) {
if (p == bcm_static_skb->skb_8k[i]) {
bcm_static_skb->pkt_use[i + STATIC_PKT_MAX_NUM] = 0;
up(&bcm_static_skb->osl_pkt_sem);
return;
}
}
#ifdef ENHANCED_STATIC_BUF
if (p == bcm_static_skb->skb_16k) {
bcm_static_skb->pkt_use[STATIC_PKT_MAX_NUM * 2] = 0;
up(&bcm_static_skb->osl_pkt_sem);
return;
}
#endif
up(&bcm_static_skb->osl_pkt_sem);
osl_pktfree(osh, p, send);
}
#endif /* CONFIG_DHD_USE_STATIC_BUF */
uint32
osl_pci_read_config(osl_t *osh, uint offset, uint size)
{
uint val = 0;
uint retry = PCI_CFG_RETRY;
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
/* only 4byte access supported */
ASSERT(size == 4);
do {
pci_read_config_dword(osh->pdev, offset, &val);
if (val != 0xffffffff)
break;
} while (retry--);
return (val);
}
void
osl_pci_write_config(osl_t *osh, uint offset, uint size, uint val)
{
uint retry = PCI_CFG_RETRY;
ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC)));
/* only 4byte access supported */
ASSERT(size == 4);
do {
pci_write_config_dword(osh->pdev, offset, val);
if (offset != PCI_BAR0_WIN)
break;
if (osl_pci_read_config(osh, offset, size) == val)
break;
} while (retry--);
}
/* return bus # for the pci device pointed by osh->pdev */
uint
osl_pci_bus(osl_t *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(osl_t *osh)
{
ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
#if defined(__ARM_ARCH_7A__) && LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 35)
return PCI_SLOT(((struct pci_dev *)osh->pdev)->devfn) + 1;
#else
return PCI_SLOT(((struct pci_dev *)osh->pdev)->devfn);
#endif
}
/* return the pci device pointed by osh->pdev */
struct pci_dev *
osl_pci_device(osl_t *osh)
{
ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev);
return osh->pdev;
}
static void
osl_pcmcia_attr(osl_t *osh, uint offset, char *buf, int size, bool write)
{
}
void
osl_pcmcia_read_attr(osl_t *osh, uint offset, void *buf, int size)
{
osl_pcmcia_attr(osh, offset, (char *) buf, size, FALSE);
}
void
osl_pcmcia_write_attr(osl_t *osh, uint offset, void *buf, int size)
{
osl_pcmcia_attr(osh, offset, (char *) buf, size, TRUE);
}
void *
osl_malloc(osl_t *osh, uint size)
{
void *addr;
/* only ASSERT if osh is defined */
if (osh)
ASSERT(osh->magic == OS_HANDLE_MAGIC);
#ifdef CONFIG_DHD_USE_STATIC_BUF
if (bcm_static_buf)
{
int i = 0;
if ((size >= PAGE_SIZE)&&(size <= STATIC_BUF_SIZE))
{
down(&bcm_static_buf->static_sem);
for (i = 0; i < STATIC_BUF_MAX_NUM; i++)
{
if (bcm_static_buf->buf_use[i] == 0)
break;
}
if (i == STATIC_BUF_MAX_NUM)
{
up(&bcm_static_buf->static_sem);
printk("all static buff in use!\n");
goto original;
}
bcm_static_buf->buf_use[i] = 1;
up(&bcm_static_buf->static_sem);
bzero(bcm_static_buf->buf_ptr+STATIC_BUF_SIZE*i, size);
if (osh)
atomic_add(size, &osh->malloced);
return ((void *)(bcm_static_buf->buf_ptr+STATIC_BUF_SIZE*i));
}
}
original:
#endif /* CONFIG_DHD_USE_STATIC_BUF */
if ((addr = kmalloc(size, GFP_ATOMIC)) == NULL) {
if (osh)
osh->failed++;
return (NULL);
}
if (osh)
atomic_add(size, &osh->malloced);
return (addr);
}
void
osl_mfree(osl_t *osh, void *addr, uint size)
{
#ifdef CONFIG_DHD_USE_STATIC_BUF
if (bcm_static_buf)
{
if ((addr > (void *)bcm_static_buf) && ((unsigned char *)addr
<= ((unsigned char *)bcm_static_buf + STATIC_BUF_TOTAL_LEN)))