diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/linux_osl.c')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/linux_osl.c | 1529 |
1 files changed, 1529 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd/linux_osl.c b/drivers/net/wireless/bcmdhd/linux_osl.c new file mode 100644 index 000000000000..5b0008d77a46 --- /dev/null +++ b/drivers/net/wireless/bcmdhd/linux_osl.c @@ -0,0 +1,1529 @@ +/* + * Linux OS Independent Layer + * + * Copyright (C) 1999-2016, 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 658506 2016-09-08 06:44:19Z $ + */ + +#define LINUX_PORT + +#include <typedefs.h> +#include <bcmendian.h> +#include <linuxver.h> +#include <bcmdefs.h> + +#ifdef __ARM_ARCH_7A__ +#include <asm/cacheflush.h> +#endif /* __ARM_ARCH_7A__ */ + +#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 */ +#define DUMPBUFSZ 1024 + +#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 { + spinlock_t static_lock; + 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; + +void* wifi_platform_prealloc(void *adapter, int section, unsigned long size); +#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_cmn_info { + atomic_t malloced; + atomic_t pktalloced; /* Number of allocated packet buffers */ + spinlock_t dbgmem_lock; + bcm_mem_link_t *dbgmem_list; + spinlock_t pktalloc_lock; + atomic_t refcount; /* Number of references to this shared structure. */ +}; +typedef struct osl_cmn_info osl_cmn_t; + +struct osl_info { + osl_pubinfo_t pub; +#ifdef CTFPOOL + ctfpool_t *ctfpool; +#endif /* CTFPOOL */ + uint magic; + void *pdev; + uint failed; + uint bustype; + osl_cmn_t *cmn; /* Common OSL related data shred between two OSH's */ + + void *bus_handle; +#ifdef BCMDBG_CTRACE + spinlock_t ctrace_lock; + struct list_head ctrace_list; + int ctrace_num; +#endif /* BCMDBG_CTRACE */ +}; + +#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 */ + -EOPNOTSUPP, /* BCME_DISABLED, BCME_NOTENABLED */ + -EIO, /* BCME_DECERR */ + -EIO, /* BCME_ENCERR */ + -EIO, /* BCME_MICERR */ + -ERANGE, /* BCME_REPLAY */ + -EINVAL, /* BCME_IE_NOTFOUND */ + +/* When an new error code is added to bcmutils.h, add os + * specific error translation here as well + */ +/* check if BCME_LAST changed since the last time this function was updated */ +#if BCME_LAST != -52 +#error "You need to add a OS error translation in the linuxbcmerrormap \ + for new error code defined in bcmutils.h" +#endif +}; + +/* 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]; +} +#ifdef SHARED_OSL_CMN +osl_t * +osl_attach(void *pdev, uint bustype, bool pkttag, void **osl_cmn) +{ +#else +osl_t * +osl_attach(void *pdev, uint bustype, bool pkttag) +{ + void **osl_cmn = NULL; +#endif /* SHARED_OSL_CMN */ + osl_t *osh; + gfp_t flags; + + flags = CAN_SLEEP() ? GFP_KERNEL: GFP_ATOMIC; + if (!(osh = kmalloc(sizeof(osl_t), flags))) + return osh; + + ASSERT(osh); + + bzero(osh, sizeof(osl_t)); + + if (osl_cmn == NULL || *osl_cmn == NULL) { + if (!(osh->cmn = kmalloc(sizeof(osl_cmn_t), flags))) { + kfree(osh); + return NULL; + } + bzero(osh->cmn, sizeof(osl_cmn_t)); + if (osl_cmn) + *osl_cmn = osh->cmn; + atomic_set(&osh->cmn->malloced, 0); + osh->cmn->dbgmem_list = NULL; + spin_lock_init(&(osh->cmn->dbgmem_lock)); + + spin_lock_init(&(osh->cmn->pktalloc_lock)); + + } else { + osh->cmn = *osl_cmn; + } + atomic_add(1, &osh->cmn->refcount); + + /* Check that error map has the right number of entries in it */ + ASSERT(ABS(BCME_LAST) == (ARRAYSIZE(linuxbcmerrormap) - 1)); + + osh->failed = 0; + osh->pdev = pdev; + osh->pub.pkttag = pkttag; + osh->bustype = bustype; + osh->magic = OS_HANDLE_MAGIC; + + 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; + } + +#ifdef BCMDBG_CTRACE + spin_lock_init(&osh->ctrace_lock); + INIT_LIST_HEAD(&osh->ctrace_list); + osh->ctrace_num = 0; +#endif /* BCMDBG_CTRACE */ + + + return osh; +} + +int osl_static_mem_init(osl_t *osh, void *adapter) +{ +#if defined(CONFIG_DHD_USE_STATIC_BUF) + if (!bcm_static_buf && adapter) { + if (!(bcm_static_buf = (bcm_static_buf_t *)wifi_platform_prealloc(adapter, + 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 -ENOMEM; + } else { + printk("alloc static buf at %p!\n", bcm_static_buf); + } + + spin_lock_init(&bcm_static_buf->static_lock); + + bcm_static_buf->buf_ptr = (unsigned char *)bcm_static_buf + STATIC_BUF_SIZE; + } + + if (!bcm_static_skb && adapter) { + int i; + void *skb_buff_ptr = 0; + bcm_static_skb = (bcm_static_pkt_t *)((char *)bcm_static_buf + 2048); + skb_buff_ptr = wifi_platform_prealloc(adapter, 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 -ENOMEM; + } + + 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 */ + + return 0; +} + +void osl_set_bus_handle(osl_t *osh, void *bus_handle) +{ + osh->bus_handle = bus_handle; +} + +void* osl_get_bus_handle(osl_t *osh) +{ + return osh->bus_handle; +} + +void +osl_detach(osl_t *osh) +{ + if (osh == NULL) + return; + + ASSERT(osh->magic == OS_HANDLE_MAGIC); + atomic_sub(1, &osh->cmn->refcount); + if (atomic_read(&osh->cmn->refcount) == 0) { + kfree(osh->cmn); + } + kfree(osh); +} + +int osl_static_mem_deinit(osl_t *osh, void *adapter) +{ +#ifdef CONFIG_DHD_USE_STATIC_BUF + if (bcm_static_buf) { + bcm_static_buf = 0; + } + if (bcm_static_skb) { + bcm_static_skb = 0; + } +#endif + return 0; +} + +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 = (in_atomic() || irqs_disabled()) ? GFP_ATOMIC : GFP_KERNEL; +#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_ZONE_DMA) + flags |= GFP_ATOMIC; +#endif + 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) +{ + gfp_t flags; + + flags = CAN_SLEEP() ? GFP_KERNEL: GFP_ATOMIC; + osh->ctfpool = kzalloc(sizeof(ctfpool_t), flags); + ASSERT(osh->ctfpool); + + 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; + } + + if (len > osh->ctfpool->obj_size) { + 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); + PKTFAST(osh, skb) &= ~(CTFBUF | SKIPCT | CHAINED); + + 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->cmn->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 *cskb; + struct sk_buff *nskb; + unsigned long pktalloced = 0; + + if (osh->pub.pkttag) + OSL_PKTTAG_CLEAR(pkt); + + /* walk the PKTCLINK() list */ + for (cskb = (struct sk_buff *)pkt; + cskb != NULL; + cskb = PKTISCHAINED(cskb) ? PKTCLINK(cskb) : NULL) { + + /* walk the pkt buffer list */ + for (nskb = cskb; nskb; nskb = nskb->next) { + + /* Increment the packet counter */ + pktalloced++; + + /* clean the 'prev' pointer + * Kernel 3.18 is leaving skb->prev pointer set to skb + * to indicate a non-fragmented skb + */ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0)) + nskb->prev = NULL; +#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) */ + + +#ifdef BCMDBG_CTRACE + ADD_CTRACE(osh, nskb, file, line); +#endif /* BCMDBG_CTRACE */ + } + } + + /* Increment the packet counter */ + atomic_add(pktalloced, &osh->cmn->pktalloced); + + 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->cmn->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; + if (osh == NULL) + return; + + 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->cmn->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_set_tail_pointer(skb, 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_set_tail_pointer(skb, 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_set_tail_pointer(skb, 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; + gfp_t flags; + + /* only ASSERT if osh is defined */ + if (osh) + ASSERT(osh->magic == OS_HANDLE_MAGIC); +#ifdef CONFIG_DHD_USE_STATIC_BUF + if (bcm_static_buf) + { + unsigned long irq_flags; + int i = 0; + if ((size >= PAGE_SIZE)&&(size <= STATIC_BUF_SIZE)) + { + spin_lock_irqsave(&bcm_static_buf->static_lock, irq_flags); + + for (i = 0; i < STATIC_BUF_MAX_NUM; i++) + { + if (bcm_static_buf->buf_use[i] == 0) + break; + } + + if (i == STATIC_BUF_MAX_NUM) + { + spin_unlock_irqrestore(&bcm_static_buf->static_lock, irq_flags); + printk("all static buff in use!\n"); + goto original; + } + + bcm_static_buf->buf_use[i] = 1; + spin_unlock_irqrestore(&bcm_static_buf->static_lock, irq_flags); + + bzero(bcm_static_buf->buf_ptr+STATIC_BUF_SIZE*i, size); + if (osh) + atomic_add(size, &osh->cmn->malloced); + + return ((void *)(bcm_static_buf->buf_ptr+STATIC_BUF_SIZE*i)); + } + } +original: +#endif /* CONFIG_DHD_USE_STATIC_BUF */ + + flags = CAN_SLEEP() ? GFP_KERNEL: GFP_ATOMIC; + if ((addr = kmalloc(size, flags)) == NULL) { + if (osh) + osh->failed++; + return (NULL); + } + if (osh && osh->cmn) + atomic_add(size, &osh->cmn->malloced); + + return (addr); +} + +void * +osl_mallocz(osl_t *osh, uint size) +{ + void *ptr; + + ptr = osl_malloc(osh, size); + + if (ptr != NULL) { + bzero(ptr, size); + } + + return ptr; +} + +void +osl_mfree(osl_t *osh, void *addr, uint size) +{ +#ifdef CONFIG_DHD_USE_STATIC_BUF + unsigned long flags; + + if (bcm_static_buf) + { + if ((addr > (void *)bcm_static_buf) && ((unsigned char *)addr + <= ((unsigned char *)bcm_static_buf + STATIC_BUF_TOTAL_LEN))) + { + int buf_idx = 0; + + buf_idx = ((unsigned char *)addr - bcm_static_buf->buf_ptr)/STATIC_BUF_SIZE; + + spin_lock_irqsave(&bcm_static_buf->static_lock, flags); + bcm_static_buf->buf_use[buf_idx] = 0; + spin_unlock_irqrestore(&bcm_static_buf->static_lock, flags); + + if (osh && osh->cmn) { + ASSERT(osh->magic == OS_HANDLE_MAGIC); + atomic_sub(size, &osh->cmn->malloced); + } + return; + } + } +#endif /* CONFIG_DHD_USE_STATIC_BUF */ + if (osh && osh->cmn) { + ASSERT(osh->magic == OS_HANDLE_MAGIC); + + ASSERT(size <= osl_malloced(osh)); + + atomic_sub(size, &osh->cmn->malloced); + } + kfree(addr); +} + +uint +osl_check_memleak(osl_t *osh) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + if (atomic_read(&osh->cmn->refcount) == 1) + return (atomic_read(&osh->cmn->malloced)); + else + return 0; +} + +uint +osl_malloced(osl_t *osh) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + return (atomic_read(&osh->cmn->malloced)); +} + +uint +osl_malloc_failed(osl_t *osh) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + return (osh->failed); +} + + +uint +osl_dma_consistent_align(void) +{ + return (PAGE_SIZE); +} + +void* +osl_dma_alloc_consistent(osl_t *osh, uint size, uint16 align_bits, uint *alloced, dmaaddr_t *pap) +{ + void *va; + uint16 align = (1 << align_bits); + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + + if (!ISALIGNED(DMA_CONSISTENT_ALIGN, align)) + size += align; + *alloced = size; + +#ifdef __ARM_ARCH_7A__ + va = kmalloc(size, GFP_ATOMIC | __GFP_ZERO); + if (va) + *pap = (ulong)__virt_to_phys((ulong)va); +#else + { + dma_addr_t pap_lin; + va = pci_alloc_consistent(osh->pdev, size, &pap_lin); + *pap = (dmaaddr_t)pap_lin; + } +#endif + return va; +} + +void +osl_dma_free_consistent(osl_t *osh, void *va, uint size, dmaaddr_t pa) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + +#ifdef __ARM_ARCH_7A__ + kfree(va); +#else + pci_free_consistent(osh->pdev, size, va, (dma_addr_t)pa); +#endif +} + +dmaaddr_t BCMFASTPATH +osl_dma_map(osl_t *osh, void *va, uint size, int direction, void *p, hnddma_seg_map_t *dmah) +{ + int dir; + + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + dir = (direction == DMA_TX)? PCI_DMA_TODEVICE: PCI_DMA_FROMDEVICE; + +#if defined(__ARM_ARCH_7A__) && defined(BCMDMASGLISTOSL) + if (dmah != NULL) { + int32 nsegs, i, totsegs = 0, totlen = 0; + struct scatterlist *sg, _sg[MAX_DMA_SEGS * 2]; + struct sk_buff *skb; + for (skb = (struct sk_buff *)p; skb != NULL; skb = PKTNEXT(osh, skb)) { + sg = &_sg[totsegs]; + if (skb_is_nonlinear(skb)) { + nsegs = skb_to_sgvec(skb, sg, 0, PKTLEN(osh, skb)); + ASSERT((nsegs > 0) && (totsegs + nsegs <= MAX_DMA_SEGS)); + pci_map_sg(osh->pdev, sg, nsegs, dir); + } else { + nsegs = 1; + ASSERT(totsegs + nsegs <= MAX_DMA_SEGS); + sg->page_link = 0; + sg_set_buf(sg, PKTDATA(osh, skb), PKTLEN(osh, skb)); + pci_map_single(osh->pdev, PKTDATA(osh, skb), PKTLEN(osh, skb), dir); + } + totsegs += nsegs; + totlen += PKTLEN(osh, skb); + } + dmah->nsegs = totsegs; + dmah->origsize = totlen; + for (i = 0, sg = _sg; i < totsegs; i++, sg++) { + dmah->segs[i].addr = sg_phys(sg); + dmah->segs[i].length = sg->length; + } + return dmah->segs[0].addr; + } +#endif /* __ARM_ARCH_7A__ && BCMDMASGLISTOSL */ + + return (pci_map_single(osh->pdev, va, size, dir)); +} + +void BCMFASTPATH +osl_dma_unmap(osl_t *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, (uint32)pa, size, dir); +} + + +#if defined(__ARM_ARCH_7A__) + +inline void BCMFASTPATH +osl_cache_flush(void *va, uint size) +{ + dma_sync_single_for_device(OSH_NULL, virt_to_dma(OSH_NULL, va), size, DMA_TX); +} + +inline void BCMFASTPATH +osl_cache_inv(void *va, uint size) +{ + dma_sync_single_for_cpu(OSH_NULL, virt_to_dma(OSH_NULL, va), size, DMA_RX); +} + +inline void osl_prefetch(const void *ptr) +{ + __asm__ __volatile__("pld\t%0" :: "o"(*(char *)ptr) : "cc"); +} +#endif + +#if defined(BCMASSERT_LOG) +void +osl_assert(const char *exp, const char *file, int line) +{ + char tempbuf[256]; + const char *basename; + + basename = strrchr(file, '/'); + /* skip the '/' */ + if (basename) + basename++; + + if (!basename) + basename = file; + +#ifdef BCMASSERT_LOG + snprintf(tempbuf, 64, "\"%s\": file \"%s\", line %d\n", + exp, basename, line); + printk("%s", tempbuf); +#endif /* BCMASSERT_LOG */ + + +} +#endif + +void +osl_delay(uint usec) +{ + uint d; + + while (usec > 0) { + d = MIN(usec, 1000); + udelay(d); + usec -= d; + } +} + +void +osl_sleep(uint ms) +{ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) + if (ms < 20) + usleep_range(ms*1000, ms*1000 + 1000); + else +#endif + msleep(ms); +} + + + +/* Clone a packet. + * The pkttag contents are NOT cloned. + */ +#ifdef BCMDBG_CTRACE +void * +osl_pktdup(osl_t *osh, void *skb, int line, char *file) +#else +void * +osl_pktdup(osl_t *osh, void *skb) +#endif /* BCMDBG_CTRACE */ +{ + void * p; + + ASSERT(!PKTISCHAINED(skb)); + + /* clear the CTFBUF flag if set and map the rest of the buffer + * before cloning. + */ + PKTCTFMAP(osh, skb); + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) + if ((p = pskb_copy((struct sk_buff *)skb, GFP_ATOMIC)) == NULL) +#else + if ((p = skb_clone((struct sk_buff *)skb, GFP_ATOMIC)) == NULL) +#endif + return NULL; + +#ifdef CTFPOOL + if (PKTISFAST(osh, skb)) { + ctfpool_t *ctfpool; + + /* if the buffer allocated from ctfpool is cloned then + * we can't be sure when it will be freed. since there + * is a chance that we will be losing a buffer + * from our pool, we increment the refill count for the + * object to be alloced later. + */ + ctfpool = (ctfpool_t *)CTFPOOLPTR(osh, skb); + ASSERT(ctfpool != NULL); + PKTCLRFAST(osh, p); + PKTCLRFAST(osh, skb); + ctfpool->refills++; + } +#endif /* CTFPOOL */ + + /* Clear PKTC context */ + PKTSETCLINK(p, NULL); + PKTCCLRFLAGS(p); + PKTCSETCNT(p, 1); + PKTCSETLEN(p, PKTLEN(osh, skb)); + + /* skb_clone copies skb->cb.. we don't want that */ + if (osh->pub.pkttag) + OSL_PKTTAG_CLEAR(p); + + /* Increment the packet counter */ + atomic_inc(&osh->cmn->pktalloced); +#ifdef BCMDBG_CTRACE + ADD_CTRACE(osh, (struct sk_buff *)p, file, line); +#endif + return (p); +} + +#ifdef BCMDBG_CTRACE +int osl_pkt_is_frmnative(osl_t *osh, struct sk_buff *pkt) +{ + unsigned long flags; + struct sk_buff *skb; + int ck = FALSE; + + spin_lock_irqsave(&osh->ctrace_lock, flags); + + list_for_each_entry(skb, &osh->ctrace_list, ctrace_list) { + if (pkt == skb) { + ck = TRUE; + break; + } + } + + spin_unlock_irqrestore(&osh->ctrace_lock, flags); + return ck; +} + +void osl_ctrace_dump(osl_t *osh, struct bcmstrbuf *b) +{ + unsigned long flags; + struct sk_buff *skb; + int idx = 0; + int i, j; + + spin_lock_irqsave(&osh->ctrace_lock, flags); + + if (b != NULL) + bcm_bprintf(b, " Total %d sbk not free\n", osh->ctrace_num); + else + printk(" Total %d sbk not free\n", osh->ctrace_num); + + list_for_each_entry(skb, &osh->ctrace_list, ctrace_list) { + if (b != NULL) + bcm_bprintf(b, "[%d] skb %p:\n", ++idx, skb); + else + printk("[%d] skb %p:\n", ++idx, skb); + + for (i = 0; i < skb->ctrace_count; i++) { + j = (skb->ctrace_start + i) % CTRACE_NUM; + if (b != NULL) + bcm_bprintf(b, " [%s(%d)]\n", skb->func[j], skb->line[j]); + else + printk(" [%s(%d)]\n", skb->func[j], skb->line[j]); + } + if (b != NULL) + bcm_bprintf(b, "\n"); + else + printk("\n"); + } + + spin_unlock_irqrestore(&osh->ctrace_lock, flags); + + return; +} +#endif /* BCMDBG_CTRACE */ + + +/* + * OSLREGOPS specifies the use of osl_XXX routines to be used for register access + */ + +/* + * BINOSL selects the slightly slower function-call-based binary compatible osl. + */ + +uint +osl_pktalloced(osl_t *osh) +{ + if (atomic_read(&osh->cmn->refcount) == 1) + return (atomic_read(&osh->cmn->pktalloced)); + else + return 0; +} + +/* Linux Kernel: File Operations: start */ +void * +osl_os_open_image(char *filename) +{ + struct file *fp; + + fp = filp_open(filename, O_RDONLY, 0); + /* + * 2.6.11 (FC4) supports filp_open() but later revs don't? + * Alternative: + * fp = open_namei(AT_FDCWD, filename, O_RD, 0); + * ??? + */ + if (IS_ERR(fp)) + fp = NULL; + + return fp; +} + +int +osl_os_get_image_block(char *buf, int len, void *image) +{ + struct file *fp = (struct file *)image; + int rdlen; + + if (!image) + return 0; + + rdlen = kernel_read(fp, fp->f_pos, buf, len); + if (rdlen > 0) + fp->f_pos += rdlen; + + return rdlen; +} + +void +osl_os_close_image(void *image) +{ + if (image) + filp_close((struct file *)image, NULL); +} + +int +osl_os_image_size(void *image) +{ + int len = 0, curroffset; + + if (image) { + /* store the current offset */ + curroffset = generic_file_llseek(image, 0, 1); + /* goto end of file to get length */ + len = generic_file_llseek(image, 0, 2); + /* restore back the offset */ + generic_file_llseek(image, curroffset, 0); + } + return len; +} + +/* Linux Kernel: File Operations: end */ |