summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/brcm80211/brcmfmac/commonring.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/commonring.c')
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/commonring.c252
1 files changed, 0 insertions, 252 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/commonring.c b/drivers/net/wireless/brcm80211/brcmfmac/commonring.c
deleted file mode 100644
index 7b0e52195..000000000
--- a/drivers/net/wireless/brcm80211/brcmfmac/commonring.c
+++ /dev/null
@@ -1,252 +0,0 @@
-/* Copyright (c) 2014 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/types.h>
-#include <linux/netdevice.h>
-
-#include <brcmu_utils.h>
-#include <brcmu_wifi.h>
-
-#include "core.h"
-#include "commonring.h"
-
-void brcmf_commonring_register_cb(struct brcmf_commonring *commonring,
- int (*cr_ring_bell)(void *ctx),
- int (*cr_update_rptr)(void *ctx),
- int (*cr_update_wptr)(void *ctx),
- int (*cr_write_rptr)(void *ctx),
- int (*cr_write_wptr)(void *ctx), void *ctx)
-{
- commonring->cr_ring_bell = cr_ring_bell;
- commonring->cr_update_rptr = cr_update_rptr;
- commonring->cr_update_wptr = cr_update_wptr;
- commonring->cr_write_rptr = cr_write_rptr;
- commonring->cr_write_wptr = cr_write_wptr;
- commonring->cr_ctx = ctx;
-}
-
-
-void brcmf_commonring_config(struct brcmf_commonring *commonring, u16 depth,
- u16 item_len, void *buf_addr)
-{
- commonring->depth = depth;
- commonring->item_len = item_len;
- commonring->buf_addr = buf_addr;
- if (!commonring->inited) {
- spin_lock_init(&commonring->lock);
- commonring->inited = true;
- }
- commonring->r_ptr = 0;
- if (commonring->cr_write_rptr)
- commonring->cr_write_rptr(commonring->cr_ctx);
- commonring->w_ptr = 0;
- if (commonring->cr_write_wptr)
- commonring->cr_write_wptr(commonring->cr_ctx);
- commonring->f_ptr = 0;
-}
-
-
-void brcmf_commonring_lock(struct brcmf_commonring *commonring)
- __acquires(&commonring->lock)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&commonring->lock, flags);
- commonring->flags = flags;
-}
-
-
-void brcmf_commonring_unlock(struct brcmf_commonring *commonring)
- __releases(&commonring->lock)
-{
- spin_unlock_irqrestore(&commonring->lock, commonring->flags);
-}
-
-
-bool brcmf_commonring_write_available(struct brcmf_commonring *commonring)
-{
- u16 available;
- bool retry = true;
-
-again:
- if (commonring->r_ptr <= commonring->w_ptr)
- available = commonring->depth - commonring->w_ptr +
- commonring->r_ptr;
- else
- available = commonring->r_ptr - commonring->w_ptr;
-
- if (available > 1) {
- if (!commonring->was_full)
- return true;
- if (available > commonring->depth / 8) {
- commonring->was_full = false;
- return true;
- }
- if (retry) {
- if (commonring->cr_update_rptr)
- commonring->cr_update_rptr(commonring->cr_ctx);
- retry = false;
- goto again;
- }
- return false;
- }
-
- if (retry) {
- if (commonring->cr_update_rptr)
- commonring->cr_update_rptr(commonring->cr_ctx);
- retry = false;
- goto again;
- }
-
- commonring->was_full = true;
- return false;
-}
-
-
-void *brcmf_commonring_reserve_for_write(struct brcmf_commonring *commonring)
-{
- void *ret_ptr;
- u16 available;
- bool retry = true;
-
-again:
- if (commonring->r_ptr <= commonring->w_ptr)
- available = commonring->depth - commonring->w_ptr +
- commonring->r_ptr;
- else
- available = commonring->r_ptr - commonring->w_ptr;
-
- if (available > 1) {
- ret_ptr = commonring->buf_addr +
- (commonring->w_ptr * commonring->item_len);
- commonring->w_ptr++;
- if (commonring->w_ptr == commonring->depth)
- commonring->w_ptr = 0;
- return ret_ptr;
- }
-
- if (retry) {
- if (commonring->cr_update_rptr)
- commonring->cr_update_rptr(commonring->cr_ctx);
- retry = false;
- goto again;
- }
-
- commonring->was_full = true;
- return NULL;
-}
-
-
-void *
-brcmf_commonring_reserve_for_write_multiple(struct brcmf_commonring *commonring,
- u16 n_items, u16 *alloced)
-{
- void *ret_ptr;
- u16 available;
- bool retry = true;
-
-again:
- if (commonring->r_ptr <= commonring->w_ptr)
- available = commonring->depth - commonring->w_ptr +
- commonring->r_ptr;
- else
- available = commonring->r_ptr - commonring->w_ptr;
-
- if (available > 1) {
- ret_ptr = commonring->buf_addr +
- (commonring->w_ptr * commonring->item_len);
- *alloced = min_t(u16, n_items, available - 1);
- if (*alloced + commonring->w_ptr > commonring->depth)
- *alloced = commonring->depth - commonring->w_ptr;
- commonring->w_ptr += *alloced;
- if (commonring->w_ptr == commonring->depth)
- commonring->w_ptr = 0;
- return ret_ptr;
- }
-
- if (retry) {
- if (commonring->cr_update_rptr)
- commonring->cr_update_rptr(commonring->cr_ctx);
- retry = false;
- goto again;
- }
-
- commonring->was_full = true;
- return NULL;
-}
-
-
-int brcmf_commonring_write_complete(struct brcmf_commonring *commonring)
-{
- void *address;
-
- address = commonring->buf_addr;
- address += (commonring->f_ptr * commonring->item_len);
- if (commonring->f_ptr > commonring->w_ptr) {
- address = commonring->buf_addr;
- commonring->f_ptr = 0;
- }
-
- commonring->f_ptr = commonring->w_ptr;
-
- if (commonring->cr_write_wptr)
- commonring->cr_write_wptr(commonring->cr_ctx);
- if (commonring->cr_ring_bell)
- return commonring->cr_ring_bell(commonring->cr_ctx);
-
- return -EIO;
-}
-
-
-void brcmf_commonring_write_cancel(struct brcmf_commonring *commonring,
- u16 n_items)
-{
- if (commonring->w_ptr == 0)
- commonring->w_ptr = commonring->depth - n_items;
- else
- commonring->w_ptr -= n_items;
-}
-
-
-void *brcmf_commonring_get_read_ptr(struct brcmf_commonring *commonring,
- u16 *n_items)
-{
- if (commonring->cr_update_wptr)
- commonring->cr_update_wptr(commonring->cr_ctx);
-
- *n_items = (commonring->w_ptr >= commonring->r_ptr) ?
- (commonring->w_ptr - commonring->r_ptr) :
- (commonring->depth - commonring->r_ptr);
-
- if (*n_items == 0)
- return NULL;
-
- return commonring->buf_addr +
- (commonring->r_ptr * commonring->item_len);
-}
-
-
-int brcmf_commonring_read_complete(struct brcmf_commonring *commonring,
- u16 n_items)
-{
- commonring->r_ptr += n_items;
- if (commonring->r_ptr == commonring->depth)
- commonring->r_ptr = 0;
-
- if (commonring->cr_write_rptr)
- return commonring->cr_write_rptr(commonring->cr_ctx);
-
- return -EIO;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-12 01:24:45 +0000