diff options
Diffstat (limited to 'drivers/net/wireless/bcmdhd/linux_osl.c')
| -rw-r--r-- | drivers/net/wireless/bcmdhd/linux_osl.c | 924 |
1 files changed, 924 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 0000000..4ef7bf7 --- /dev/null +++ b/drivers/net/wireless/bcmdhd/linux_osl.c @@ -0,0 +1,924 @@ +/* + * Linux OS Independent Layer + * + * Copyright (C) 1999-2011, 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,v 1.168.2.7 2011-01-27 17:01:13 $ + */ + + +#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> + +#ifdef BCMASSERT_LOG +#include <bcm_assert_log.h> +#endif + +#include <linux/fs.h> + +#define PCI_CFG_RETRY 10 + +#define OS_HANDLE_MAGIC 0x1234abcd +#define BCM_MEM_FILENAME_LEN 24 + +#ifdef CONFIG_DHD_USE_STATIC_BUF +#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 + +typedef struct bcm_static_pkt { + struct sk_buff *skb_4k[STATIC_PKT_MAX_NUM]; + struct sk_buff *skb_8k[STATIC_PKT_MAX_NUM]; + struct semaphore osl_pkt_sem; + unsigned char pkt_use[STATIC_PKT_MAX_NUM * 2]; +} bcm_static_pkt_t; + +static bcm_static_pkt_t *bcm_static_skb = 0; +#endif + +typedef struct bcm_mem_link { + struct bcm_mem_link *prev; + struct bcm_mem_link *next; + uint size; + int line; + char file[BCM_MEM_FILENAME_LEN]; +} bcm_mem_link_t; + +struct osl_info { + osl_pubinfo_t pub; +#ifdef CTFPOOL + ctfpool_t *ctfpool; +#endif + uint magic; + void *pdev; + atomic_t malloced; + uint failed; + uint bustype; + bcm_mem_link_t *dbgmem_list; +}; + + + + +uint32 g_assert_type = FALSE; + +static int16 linuxbcmerrormap[] = +{ 0, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -E2BIG, + -E2BIG, + -EBUSY, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EFAULT, + -ENOMEM, + -EOPNOTSUPP, + -EMSGSIZE, + -EINVAL, + -EPERM, + -ENOMEM, + -EINVAL, + -ERANGE, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EINVAL, + -EIO, + -ENODEV, + -EINVAL, + -EIO, + -EIO, + -ENODEV, + -EINVAL, + -ENODATA, + + + +#if BCME_LAST != -42 +#error "You need to add a OS error translation in the linuxbcmerrormap \ + for new error code defined in bcmutils.h" +#endif +}; + + +int +osl_error(int bcmerror) +{ + if (bcmerror > 0) + bcmerror = 0; + else if (bcmerror < BCME_LAST) + bcmerror = BCME_ERROR; + + + 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 (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)) + gfp_t flags; + + flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; + osh = kmalloc(sizeof(osl_t), flags); +#else + osh = kmalloc(sizeof(osl_t), GFP_ATOMIC); +#endif + ASSERT(osh); + + bzero(osh, sizeof(osl_t)); + + + ASSERT(ABS(BCME_LAST) == (ARRAYSIZE(linuxbcmerrormap) - 1)); + + osh->magic = OS_HANDLE_MAGIC; + atomic_set(&osh->malloced, 0); + osh->failed = 0; + osh->dbgmem_list = NULL; + 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"); + } + 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); + + bcopy(skb_buff_ptr, bcm_static_skb, sizeof(struct sk_buff *) * 16); + for (i = 0; i < STATIC_PKT_MAX_NUM * 2; i++) + bcm_static_skb->pkt_use[i] = 0; + + sema_init(&bcm_static_skb->osl_pkt_sem, 1); + } +#endif + + return osh; +} + +void +osl_detach(osl_t *osh) +{ + if (osh == NULL) + return; + + ASSERT(osh->magic == OS_HANDLE_MAGIC); + kfree(osh); +} + +static struct sk_buff *osl_alloc_skb(unsigned int len) +{ +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) + gfp_t flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; + + return __dev_alloc_skb(len, flags); +#else + return dev_alloc_skb(len); +#endif +} + +#ifdef CTFPOOL + +void * +osl_ctfpool_add(osl_t *osh) +{ + struct sk_buff *skb; + + if ((osh == NULL) || (osh->ctfpool == NULL)) + return NULL; + + spin_lock_bh(&osh->ctfpool->lock); + ASSERT(osh->ctfpool->curr_obj <= osh->ctfpool->max_obj); + + + if (osh->ctfpool->curr_obj == osh->ctfpool->max_obj) { + spin_unlock_bh(&osh->ctfpool->lock); + return NULL; + } + + + skb = osl_alloc_skb(osh->ctfpool->obj_size); + if (skb == NULL) { + printf("%s: skb alloc of len %d failed\n", __FUNCTION__, + osh->ctfpool->obj_size); + spin_unlock_bh(&osh->ctfpool->lock); + return NULL; + } + + + skb->next = (struct sk_buff *)osh->ctfpool->head; + osh->ctfpool->head = skb; + osh->ctfpool->fast_frees++; + osh->ctfpool->curr_obj++; + + + CTFPOOLPTR(osh, skb) = (void *)osh->ctfpool; + + + PKTFAST(osh, skb) = FASTBUF; + + spin_unlock_bh(&osh->ctfpool->lock); + + return skb; +} + + +void +osl_ctfpool_replenish(osl_t *osh, uint thresh) +{ + if ((osh == NULL) || (osh->ctfpool == NULL)) + return; + + + while ((osh->ctfpool->refills > 0) && (thresh--)) { + osl_ctfpool_add(osh); + osh->ctfpool->refills--; + } +} + + +int32 +osl_ctfpool_init(osl_t *osh, uint numobj, uint size) +{ +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)) + gfp_t flags; + + flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; + osh->ctfpool = kmalloc(sizeof(ctfpool_t), flags); +#else + osh->ctfpool = kmalloc(sizeof(ctfpool_t), GFP_ATOMIC); +#endif + 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; +} + + +void +osl_ctfpool_cleanup(osl_t *osh) +{ + struct sk_buff *skb, *nskb; + + if ((osh == NULL) || (osh->ctfpool == NULL)) + return; + + spin_lock_bh(&osh->ctfpool->lock); + + 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; + spin_unlock_bh(&osh->ctfpool->lock); + + 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 + + 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; + + + if (osh->ctfpool == NULL) + return NULL; + + spin_lock_bh(&osh->ctfpool->lock); + if (osh->ctfpool->head == NULL) { + ASSERT(osh->ctfpool->curr_obj == 0); + osh->ctfpool->slow_allocs++; + spin_unlock_bh(&osh->ctfpool->lock); + return NULL; + } + + ASSERT(len <= osh->ctfpool->obj_size); + + + 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); + spin_unlock_bh(&osh->ctfpool->lock); + + + skb->next = skb->prev = NULL; + skb->data = skb->head + 16; + skb->tail = skb->head + 16; + + skb->len = 0; + skb->cloned = 0; +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14) + skb->list = NULL; +#endif + atomic_set(&skb->users, 1); + + return skb; +} +#endif + + +void * BCMFASTPATH +osl_pktget(osl_t *osh, uint len) +{ + struct sk_buff *skb; + +#ifdef CTFPOOL + skb = osl_pktfastget(osh, len); + if ((skb != NULL) || ((skb = osl_alloc_skb(len)) != NULL)) { +#else + if ((skb = osl_alloc_skb(len))) { +#endif + skb_put(skb, len); + skb->priority = 0; + + osh->pub.pktalloced++; + } + + return ((void*) skb); +} + +#ifdef CTFPOOL +static inline void +osl_pktfastfree(osl_t *osh, struct sk_buff *skb) +{ + ctfpool_t *ctfpool; + + ctfpool = (ctfpool_t *)CTFPOOLPTR(osh, skb); + ASSERT(ctfpool != NULL); + + + spin_lock_bh(&ctfpool->lock); + skb->next = (struct sk_buff *)ctfpool->head; + ctfpool->head = (void *)skb; + + ctfpool->fast_frees++; + ctfpool->curr_obj++; + + ASSERT(ctfpool->curr_obj <= ctfpool->max_obj); + spin_unlock_bh(&ctfpool->lock); + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 14) + skb->tstamp.tv.sec = 0; +#else + skb->stamp.tv_sec = 0; +#endif + + + skb->dev = NULL; + skb->dst = NULL; + memset(skb->cb, 0, sizeof(skb->cb)); + skb->ip_summed = 0; + skb->destructor = NULL; +} +#endif + + +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); + + + while (skb) { + nskb = skb->next; + skb->next = NULL; + + +#ifdef CTFPOOL + if (PKTISFAST(osh, skb)) + osl_pktfastfree(osh, skb); + else { +#else + { +#endif + + if (skb->destructor) + + dev_kfree_skb_any(skb); + else + + dev_kfree_skb(skb); + } + + osh->pub.pktalloced--; + + skb = nskb; + } +} + +#ifdef CONFIG_DHD_USE_STATIC_BUF +void * +osl_pktget_static(osl_t *osh, uint len) +{ + int i; + struct sk_buff *skb; + + if (!bcm_static_skb || (len > (PAGE_SIZE * 2))) { + 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 <= PAGE_SIZE) { + 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; + } + } + + + 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; + } + + 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; + } + } + up(&bcm_static_skb->osl_pkt_sem); + + osl_pktfree(osh, p, send); + return; +} +#endif + +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))); + + + 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))); + + + 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--); + +} + + +uint +osl_pci_bus(osl_t *osh) +{ + ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev); + + return ((struct pci_dev *)osh->pdev)->bus->number; +} + + +uint +osl_pci_slot(osl_t *osh) +{ + ASSERT(osh && (osh->magic == OS_HANDLE_MAGIC) && osh->pdev); + + return PCI_SLOT(((struct pci_dev *)osh->pdev)->devfn); +} + +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; +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)) + gfp_t flags; + + + if (osh) + ASSERT(osh->magic == OS_HANDLE_MAGIC); + + flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; + if ((addr = kmalloc(size, flags)) == NULL) { +#else + if ((addr = kmalloc(size, GFP_ATOMIC)) == NULL) { +#endif + 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) +{ + if (osh) { + ASSERT(osh->magic == OS_HANDLE_MAGIC); + atomic_sub(size, &osh->malloced); + } + kfree(addr); +} + +uint +osl_malloced(osl_t *osh) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + return (atomic_read(&osh->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, ulong *pap) +{ + uint16 align = (1 << align_bits); + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + + if (!ISALIGNED(DMA_CONSISTENT_ALIGN, align)) + size += align; + *alloced = size; + + return (pci_alloc_consistent(osh->pdev, size, (dma_addr_t*)pap)); +} + +void +osl_dma_free_consistent(osl_t *osh, void *va, uint size, ulong pa) +{ + ASSERT((osh && (osh->magic == OS_HANDLE_MAGIC))); + + pci_free_consistent(osh->pdev, size, va, (dma_addr_t)pa); +} + +uint BCMFASTPATH +osl_dma_map(osl_t *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(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(BCMASSERT_LOG) +void +osl_assert(char *exp, char *file, int line) +{ + char tempbuf[256]; + char *basename; + + basename = strrchr(file, '/'); + + if (basename) + basename++; + + if (!basename) + basename = file; + +#ifdef BCMASSERT_LOG + snprintf(tempbuf, 64, "\"%s\": file \"%s\", line %d\n", + exp, basename, line); + + bcm_assert_log(tempbuf); +#endif + + +} +#endif + +void +osl_delay(uint usec) +{ + uint d; + + while (usec > 0) { + d = MIN(usec, 1000); + udelay(d); + usec -= d; + } +} + + + +void * +osl_pktdup(osl_t *osh, void *skb) +{ + void * p; +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)) + gfp_t flags; + + flags = (in_atomic()) ? GFP_ATOMIC : GFP_KERNEL; + if ((p = skb_clone((struct sk_buff *)skb, flags)) == 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; + + + ctfpool = (ctfpool_t *)CTFPOOLPTR(osh, skb); + ASSERT(ctfpool != NULL); + PKTCLRFAST(osh, p); + PKTCLRFAST(osh, skb); + ctfpool->refills++; + } +#endif + + + if (osh->pub.pkttag) + bzero((void*)((struct sk_buff *)p)->cb, OSL_PKTTAG_SZ); + + + osh->pub.pktalloced++; + return (p); +} + + + + + + + +void * +osl_os_open_image(char *filename) +{ + struct file *fp; + + fp = filp_open(filename, O_RDONLY, 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); +} |