caif: remove caif_shm
authorErwan Yvin <erwan.yvin@stericsson.com>
Mon, 11 Mar 2013 03:13:03 +0000 (03:13 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 17 Mar 2013 16:16:38 +0000 (12:16 -0400)
caif_shm is an old implementation
caif_shm will be replaced by caif_virtio

[ As explained by Linus Walleij: "U5500 used this, but was cancelled
  and the silicon did not reach anyone outside ST-Ericsson.  Then for
  the next platforms, we have gone for the leaner & cleaner approach
  of using virtio, rpmesg and rproc." ]

Signed-off-by: Erwan Yvin <erwan.yvin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Sjur Brendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/caif/Kconfig
drivers/net/caif/Makefile
drivers/net/caif/caif_shm_u5500.c [deleted file]
drivers/net/caif/caif_shmcore.c [deleted file]
include/net/caif/caif_shm.h [deleted file]

index 60c2142373c99a62d1a5029179c559712928ee43..a966128c2a7ab8014126ccad2370b3946a4c0ad7 100644 (file)
@@ -32,13 +32,6 @@ config CAIF_SPI_SYNC
        help to synchronize to the next transfer in case of over or under-runs.
        This option also needs to be enabled on the modem.
 
-config CAIF_SHM
-       tristate "CAIF shared memory protocol driver"
-       depends on CAIF && U5500_MBOX
-       default n
-       ---help---
-       The CAIF shared memory protocol driver for the STE UX5500 platform.
-
 config CAIF_HSI
        tristate "CAIF HSI transport driver"
        depends on CAIF
index 91dff861560f71c8d58010066b614268ce60a935..15a9d2fc753dcc8ef1ea6153b3be59c3ed6d5eb7 100644 (file)
@@ -7,9 +7,5 @@ obj-$(CONFIG_CAIF_TTY) += caif_serial.o
 cfspi_slave-objs := caif_spi.o caif_spi_slave.o
 obj-$(CONFIG_CAIF_SPI_SLAVE) += cfspi_slave.o
 
-# Shared memory
-caif_shm-objs := caif_shmcore.o caif_shm_u5500.o
-obj-$(CONFIG_CAIF_SHM) += caif_shm.o
-
 # HSI interface
 obj-$(CONFIG_CAIF_HSI) += caif_hsi.o
diff --git a/drivers/net/caif/caif_shm_u5500.c b/drivers/net/caif/caif_shm_u5500.c
deleted file mode 100644 (file)
index 89d76b7..0000000
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (C) ST-Ericsson AB 2010
- * Contact: Sjur Brendeland / sjur.brandeland@stericsson.com
- * Author:  Amarnath Revanna / amarnath.bangalore.revanna@stericsson.com
- * License terms: GNU General Public License (GPL) version 2
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ":" fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <mach/mbox-db5500.h>
-#include <net/caif/caif_shm.h>
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("CAIF Shared Memory protocol driver");
-
-#define MAX_SHM_INSTANCES      1
-
-enum {
-       MBX_ACC0,
-       MBX_ACC1,
-       MBX_DSP
-};
-
-static struct shmdev_layer shmdev_lyr[MAX_SHM_INSTANCES];
-
-static unsigned int shm_start;
-static unsigned int shm_size;
-
-module_param(shm_size, uint  , 0440);
-MODULE_PARM_DESC(shm_total_size, "Start of SHM shared memory");
-
-module_param(shm_start, uint  , 0440);
-MODULE_PARM_DESC(shm_total_start, "Total Size of SHM shared memory");
-
-static int shmdev_send_msg(u32 dev_id, u32 mbx_msg)
-{
-       /* Always block until msg is written successfully */
-       mbox_send(shmdev_lyr[dev_id].hmbx, mbx_msg, true);
-       return 0;
-}
-
-static int shmdev_mbx_setup(void *pshmdrv_cb, struct shmdev_layer *pshm_dev,
-                                                        void *pshm_drv)
-{
-       /*
-        * For UX5500, we have only 1 SHM instance which uses MBX0
-        * for communication with the peer modem
-        */
-       pshm_dev->hmbx = mbox_setup(MBX_ACC0, pshmdrv_cb, pshm_drv);
-
-       if (!pshm_dev->hmbx)
-               return -ENODEV;
-       else
-               return 0;
-}
-
-static int __init caif_shmdev_init(void)
-{
-       int i, result;
-
-       /* Loop is currently overkill, there is only one instance */
-       for (i = 0; i < MAX_SHM_INSTANCES; i++) {
-
-               shmdev_lyr[i].shm_base_addr = shm_start;
-               shmdev_lyr[i].shm_total_sz = shm_size;
-
-               if (((char *)shmdev_lyr[i].shm_base_addr == NULL)
-                              || (shmdev_lyr[i].shm_total_sz <= 0))    {
-                       pr_warn("ERROR,"
-                               "Shared memory Address and/or Size incorrect"
-                               ", Bailing out ...\n");
-                       result = -EINVAL;
-                       goto clean;
-               }
-
-               pr_info("SHM AREA (instance %d) STARTS"
-                       " AT %p\n", i, (char *)shmdev_lyr[i].shm_base_addr);
-
-               shmdev_lyr[i].shm_id = i;
-               shmdev_lyr[i].pshmdev_mbxsend = shmdev_send_msg;
-               shmdev_lyr[i].pshmdev_mbxsetup = shmdev_mbx_setup;
-
-               /*
-                * Finally, CAIF core module is called with details in place:
-                * 1. SHM base address
-                * 2. SHM size
-                * 3. MBX handle
-                */
-               result = caif_shmcore_probe(&shmdev_lyr[i]);
-               if (result) {
-                       pr_warn("ERROR[%d],"
-                               "Could not probe SHM core (instance %d)"
-                               " Bailing out ...\n", result, i);
-                       goto clean;
-               }
-       }
-
-       return 0;
-
-clean:
-       /*
-        * For now, we assume that even if one instance of SHM fails, we bail
-        * out of the driver support completely. For this, we need to release
-        * any memory allocated and unregister any instance of SHM net device.
-        */
-       for (i = 0; i < MAX_SHM_INSTANCES; i++) {
-               if (shmdev_lyr[i].pshm_netdev)
-                       unregister_netdev(shmdev_lyr[i].pshm_netdev);
-       }
-       return result;
-}
-
-static void __exit caif_shmdev_exit(void)
-{
-       int i;
-
-       for (i = 0; i < MAX_SHM_INSTANCES; i++) {
-               caif_shmcore_remove(shmdev_lyr[i].pshm_netdev);
-               kfree((void *)shmdev_lyr[i].shm_base_addr);
-       }
-
-}
-
-module_init(caif_shmdev_init);
-module_exit(caif_shmdev_exit);
diff --git a/drivers/net/caif/caif_shmcore.c b/drivers/net/caif/caif_shmcore.c
deleted file mode 100644 (file)
index cca2afc..0000000
+++ /dev/null
@@ -1,744 +0,0 @@
-/*
- * Copyright (C) ST-Ericsson AB 2010
- * Contact: Sjur Brendeland / sjur.brandeland@stericsson.com
- * Authors:  Amarnath Revanna / amarnath.bangalore.revanna@stericsson.com,
- *           Daniel Martensson / daniel.martensson@stericsson.com
- * License terms: GNU General Public License (GPL) version 2
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ":" fmt
-
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include <linux/list.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/io.h>
-
-#include <net/caif/caif_device.h>
-#include <net/caif/caif_shm.h>
-
-#define NR_TX_BUF              6
-#define NR_RX_BUF              6
-#define TX_BUF_SZ              0x2000
-#define RX_BUF_SZ              0x2000
-
-#define CAIF_NEEDED_HEADROOM   32
-
-#define CAIF_FLOW_ON           1
-#define CAIF_FLOW_OFF          0
-
-#define LOW_WATERMARK          3
-#define HIGH_WATERMARK         4
-
-/* Maximum number of CAIF buffers per shared memory buffer. */
-#define SHM_MAX_FRMS_PER_BUF   10
-
-/*
- * Size in bytes of the descriptor area
- * (With end of descriptor signalling)
- */
-#define SHM_CAIF_DESC_SIZE     ((SHM_MAX_FRMS_PER_BUF + 1) * \
-                                       sizeof(struct shm_pck_desc))
-
-/*
- * Offset to the first CAIF frame within a shared memory buffer.
- * Aligned on 32 bytes.
- */
-#define SHM_CAIF_FRM_OFS       (SHM_CAIF_DESC_SIZE + (SHM_CAIF_DESC_SIZE % 32))
-
-/* Number of bytes for CAIF shared memory header. */
-#define SHM_HDR_LEN            1
-
-/* Number of padding bytes for the complete CAIF frame. */
-#define SHM_FRM_PAD_LEN                4
-
-#define CAIF_MAX_MTU           4096
-
-#define SHM_SET_FULL(x)        (((x+1) & 0x0F) << 0)
-#define SHM_GET_FULL(x)        (((x >> 0) & 0x0F) - 1)
-
-#define SHM_SET_EMPTY(x)       (((x+1) & 0x0F) << 4)
-#define SHM_GET_EMPTY(x)       (((x >> 4) & 0x0F) - 1)
-
-#define SHM_FULL_MASK          (0x0F << 0)
-#define SHM_EMPTY_MASK         (0x0F << 4)
-
-struct shm_pck_desc {
-       /*
-        * Offset from start of shared memory area to start of
-        * shared memory CAIF frame.
-        */
-       u32 frm_ofs;
-       u32 frm_len;
-};
-
-struct buf_list {
-       unsigned char *desc_vptr;
-       u32 phy_addr;
-       u32 index;
-       u32 len;
-       u32 frames;
-       u32 frm_ofs;
-       struct list_head list;
-};
-
-struct shm_caif_frm {
-       /* Number of bytes of padding before the CAIF frame. */
-       u8 hdr_ofs;
-};
-
-struct shmdrv_layer {
-       /* caif_dev_common must always be first in the structure*/
-       struct caif_dev_common cfdev;
-
-       u32 shm_tx_addr;
-       u32 shm_rx_addr;
-       u32 shm_base_addr;
-       u32 tx_empty_available;
-       spinlock_t lock;
-
-       struct list_head tx_empty_list;
-       struct list_head tx_pend_list;
-       struct list_head tx_full_list;
-       struct list_head rx_empty_list;
-       struct list_head rx_pend_list;
-       struct list_head rx_full_list;
-
-       struct workqueue_struct *pshm_tx_workqueue;
-       struct workqueue_struct *pshm_rx_workqueue;
-
-       struct work_struct shm_tx_work;
-       struct work_struct shm_rx_work;
-
-       struct sk_buff_head sk_qhead;
-       struct shmdev_layer *pshm_dev;
-};
-
-static int shm_netdev_open(struct net_device *shm_netdev)
-{
-       netif_wake_queue(shm_netdev);
-       return 0;
-}
-
-static int shm_netdev_close(struct net_device *shm_netdev)
-{
-       netif_stop_queue(shm_netdev);
-       return 0;
-}
-
-int caif_shmdrv_rx_cb(u32 mbx_msg, void *priv)
-{
-       struct buf_list *pbuf;
-       struct shmdrv_layer *pshm_drv;
-       struct list_head *pos;
-       u32 avail_emptybuff = 0;
-       unsigned long flags = 0;
-
-       pshm_drv = priv;
-
-       /* Check for received buffers. */
-       if (mbx_msg & SHM_FULL_MASK) {
-               int idx;
-
-               spin_lock_irqsave(&pshm_drv->lock, flags);
-
-               /* Check whether we have any outstanding buffers. */
-               if (list_empty(&pshm_drv->rx_empty_list)) {
-
-                       /* Release spin lock. */
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-                       /* We print even in IRQ context... */
-                       pr_warn("No empty Rx buffers to fill: "
-                                       "mbx_msg:%x\n", mbx_msg);
-
-                       /* Bail out. */
-                       goto err_sync;
-               }
-
-               pbuf =
-                       list_entry(pshm_drv->rx_empty_list.next,
-                                       struct buf_list, list);
-               idx = pbuf->index;
-
-               /* Check buffer synchronization. */
-               if (idx != SHM_GET_FULL(mbx_msg)) {
-
-                       /* We print even in IRQ context... */
-                       pr_warn(
-                       "phyif_shm_mbx_msg_cb: RX full out of sync:"
-                       " idx:%d, msg:%x SHM_GET_FULL(mbx_msg):%x\n",
-                               idx, mbx_msg, SHM_GET_FULL(mbx_msg));
-
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-                       /* Bail out. */
-                       goto err_sync;
-               }
-
-               list_del_init(&pbuf->list);
-               list_add_tail(&pbuf->list, &pshm_drv->rx_full_list);
-
-               spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-               /* Schedule RX work queue. */
-               if (!work_pending(&pshm_drv->shm_rx_work))
-                       queue_work(pshm_drv->pshm_rx_workqueue,
-                                               &pshm_drv->shm_rx_work);
-       }
-
-       /* Check for emptied buffers. */
-       if (mbx_msg & SHM_EMPTY_MASK) {
-               int idx;
-
-               spin_lock_irqsave(&pshm_drv->lock, flags);
-
-               /* Check whether we have any outstanding buffers. */
-               if (list_empty(&pshm_drv->tx_full_list)) {
-
-                       /* We print even in IRQ context... */
-                       pr_warn("No TX to empty: msg:%x\n", mbx_msg);
-
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-                       /* Bail out. */
-                       goto err_sync;
-               }
-
-               pbuf =
-                       list_entry(pshm_drv->tx_full_list.next,
-                                       struct buf_list, list);
-               idx = pbuf->index;
-
-               /* Check buffer synchronization. */
-               if (idx != SHM_GET_EMPTY(mbx_msg)) {
-
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-                       /* We print even in IRQ context... */
-                       pr_warn("TX empty "
-                               "out of sync:idx:%d, msg:%x\n", idx, mbx_msg);
-
-                       /* Bail out. */
-                       goto err_sync;
-               }
-               list_del_init(&pbuf->list);
-
-               /* Reset buffer parameters. */
-               pbuf->frames = 0;
-               pbuf->frm_ofs = SHM_CAIF_FRM_OFS;
-
-               list_add_tail(&pbuf->list, &pshm_drv->tx_empty_list);
-
-               /* Check the available no. of buffers in the empty list */
-               list_for_each(pos, &pshm_drv->tx_empty_list)
-                       avail_emptybuff++;
-
-               /* Check whether we have to wake up the transmitter. */
-               if ((avail_emptybuff > HIGH_WATERMARK) &&
-                                       (!pshm_drv->tx_empty_available)) {
-                       pshm_drv->tx_empty_available = 1;
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-                       pshm_drv->cfdev.flowctrl
-                                       (pshm_drv->pshm_dev->pshm_netdev,
-                                                               CAIF_FLOW_ON);
-
-
-                       /* Schedule the work queue. if required */
-                       if (!work_pending(&pshm_drv->shm_tx_work))
-                               queue_work(pshm_drv->pshm_tx_workqueue,
-                                                       &pshm_drv->shm_tx_work);
-               } else
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-       }
-
-       return 0;
-
-err_sync:
-       return -EIO;
-}
-
-static void shm_rx_work_func(struct work_struct *rx_work)
-{
-       struct shmdrv_layer *pshm_drv;
-       struct buf_list *pbuf;
-       unsigned long flags = 0;
-       struct sk_buff *skb;
-       char *p;
-       int ret;
-
-       pshm_drv = container_of(rx_work, struct shmdrv_layer, shm_rx_work);
-
-       while (1) {
-
-               struct shm_pck_desc *pck_desc;
-
-               spin_lock_irqsave(&pshm_drv->lock, flags);
-
-               /* Check for received buffers. */
-               if (list_empty(&pshm_drv->rx_full_list)) {
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-                       break;
-               }
-
-               pbuf =
-                       list_entry(pshm_drv->rx_full_list.next, struct buf_list,
-                                       list);
-               list_del_init(&pbuf->list);
-               spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-               /* Retrieve pointer to start of the packet descriptor area. */
-               pck_desc = (struct shm_pck_desc *) pbuf->desc_vptr;
-
-               /*
-                * Check whether descriptor contains a CAIF shared memory
-                * frame.
-                */
-               while (pck_desc->frm_ofs) {
-                       unsigned int frm_buf_ofs;
-                       unsigned int frm_pck_ofs;
-                       unsigned int frm_pck_len;
-                       /*
-                        * Check whether offset is within buffer limits
-                        * (lower).
-                        */
-                       if (pck_desc->frm_ofs <
-                               (pbuf->phy_addr - pshm_drv->shm_base_addr))
-                               break;
-                       /*
-                        * Check whether offset is within buffer limits
-                        * (higher).
-                        */
-                       if (pck_desc->frm_ofs >
-                               ((pbuf->phy_addr - pshm_drv->shm_base_addr) +
-                                       pbuf->len))
-                               break;
-
-                       /* Calculate offset from start of buffer. */
-                       frm_buf_ofs =
-                               pck_desc->frm_ofs - (pbuf->phy_addr -
-                                               pshm_drv->shm_base_addr);
-
-                       /*
-                        * Calculate offset and length of CAIF packet while
-                        * taking care of the shared memory header.
-                        */
-                       frm_pck_ofs =
-                               frm_buf_ofs + SHM_HDR_LEN +
-                               (*(pbuf->desc_vptr + frm_buf_ofs));
-                       frm_pck_len =
-                               (pck_desc->frm_len - SHM_HDR_LEN -
-                               (*(pbuf->desc_vptr + frm_buf_ofs)));
-
-                       /* Check whether CAIF packet is within buffer limits */
-                       if ((frm_pck_ofs + pck_desc->frm_len) > pbuf->len)
-                               break;
-
-                       /* Get a suitable CAIF packet and copy in data. */
-                       skb = netdev_alloc_skb(pshm_drv->pshm_dev->pshm_netdev,
-                                                       frm_pck_len + 1);
-                       if (skb == NULL)
-                               break;
-
-                       p = skb_put(skb, frm_pck_len);
-                       memcpy(p, pbuf->desc_vptr + frm_pck_ofs, frm_pck_len);
-
-                       skb->protocol = htons(ETH_P_CAIF);
-                       skb_reset_mac_header(skb);
-                       skb->dev = pshm_drv->pshm_dev->pshm_netdev;
-
-                       /* Push received packet up the stack. */
-                       ret = netif_rx_ni(skb);
-
-                       if (!ret) {
-                               pshm_drv->pshm_dev->pshm_netdev->stats.
-                                                               rx_packets++;
-                               pshm_drv->pshm_dev->pshm_netdev->stats.
-                                               rx_bytes += pck_desc->frm_len;
-                       } else
-                               ++pshm_drv->pshm_dev->pshm_netdev->stats.
-                                                               rx_dropped;
-                       /* Move to next packet descriptor. */
-                       pck_desc++;
-               }
-
-               spin_lock_irqsave(&pshm_drv->lock, flags);
-               list_add_tail(&pbuf->list, &pshm_drv->rx_pend_list);
-
-               spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-       }
-
-       /* Schedule the work queue. if required */
-       if (!work_pending(&pshm_drv->shm_tx_work))
-               queue_work(pshm_drv->pshm_tx_workqueue, &pshm_drv->shm_tx_work);
-
-}
-
-static void shm_tx_work_func(struct work_struct *tx_work)
-{
-       u32 mbox_msg;
-       unsigned int frmlen, avail_emptybuff, append = 0;
-       unsigned long flags = 0;
-       struct buf_list *pbuf = NULL;
-       struct shmdrv_layer *pshm_drv;
-       struct shm_caif_frm *frm;
-       struct sk_buff *skb;
-       struct shm_pck_desc *pck_desc;
-       struct list_head *pos;
-
-       pshm_drv = container_of(tx_work, struct shmdrv_layer, shm_tx_work);
-
-       do {
-               /* Initialize mailbox message. */
-               mbox_msg = 0x00;
-               avail_emptybuff = 0;
-
-               spin_lock_irqsave(&pshm_drv->lock, flags);
-
-               /* Check for pending receive buffers. */
-               if (!list_empty(&pshm_drv->rx_pend_list)) {
-
-                       pbuf = list_entry(pshm_drv->rx_pend_list.next,
-                                               struct buf_list, list);
-
-                       list_del_init(&pbuf->list);
-                       list_add_tail(&pbuf->list, &pshm_drv->rx_empty_list);
-                       /*
-                        * Value index is never changed,
-                        * so read access should be safe.
-                        */
-                       mbox_msg |= SHM_SET_EMPTY(pbuf->index);
-               }
-
-               skb = skb_peek(&pshm_drv->sk_qhead);
-
-               if (skb == NULL)
-                       goto send_msg;
-               /* Check the available no. of buffers in the empty list */
-               list_for_each(pos, &pshm_drv->tx_empty_list)
-                       avail_emptybuff++;
-
-               if ((avail_emptybuff < LOW_WATERMARK) &&
-                                       pshm_drv->tx_empty_available) {
-                       /* Update blocking condition. */
-                       pshm_drv->tx_empty_available = 0;
-                       spin_unlock_irqrestore(&pshm_drv->lock, flags);
-                       pshm_drv->cfdev.flowctrl
-                                       (pshm_drv->pshm_dev->pshm_netdev,
-                                       CAIF_FLOW_OFF);
-                       spin_lock_irqsave(&pshm_drv->lock, flags);
-               }
-               /*
-                * We simply return back to the caller if we do not have space
-                * either in Tx pending list or Tx empty list. In this case,
-                * we hold the received skb in the skb list, waiting to
-                * be transmitted once Tx buffers become available
-                */
-               if (list_empty(&pshm_drv->tx_empty_list))
-                       goto send_msg;
-
-               /* Get the first free Tx buffer. */
-               pbuf = list_entry(pshm_drv->tx_empty_list.next,
-                                               struct buf_list, list);
-               do {
-                       if (append) {
-                               skb = skb_peek(&pshm_drv->sk_qhead);
-                               if (skb == NULL)
-                                       break;
-                       }
-
-                       frm = (struct shm_caif_frm *)
-                                       (pbuf->desc_vptr + pbuf->frm_ofs);
-
-                       frm->hdr_ofs = 0;
-                       frmlen = 0;
-                       frmlen += SHM_HDR_LEN + frm->hdr_ofs + skb->len;
-
-                       /* Add tail padding if needed. */
-                       if (frmlen % SHM_FRM_PAD_LEN)
-                               frmlen += SHM_FRM_PAD_LEN -
-                                               (frmlen % SHM_FRM_PAD_LEN);
-
-                       /*
-                        * Verify that packet, header and additional padding
-                        * can fit within the buffer frame area.
-                        */
-                       if (frmlen >= (pbuf->len - pbuf->frm_ofs))
-                               break;
-
-                       if (!append) {
-                               list_del_init(&pbuf->list);
-                               append = 1;
-                       }
-
-                       skb = skb_dequeue(&pshm_drv->sk_qhead);
-                       if (skb == NULL)
-                               break;
-                       /* Copy in CAIF frame. */
-                       skb_copy_bits(skb, 0, pbuf->desc_vptr +
-                                       pbuf->frm_ofs + SHM_HDR_LEN +
-                                               frm->hdr_ofs, skb->len);
-
-                       pshm_drv->pshm_dev->pshm_netdev->stats.tx_packets++;
-                       pshm_drv->pshm_dev->pshm_netdev->stats.tx_bytes +=
-                                                                       frmlen;
-                       dev_kfree_skb_irq(skb);
-
-                       /* Fill in the shared memory packet descriptor area. */
-                       pck_desc = (struct shm_pck_desc *) (pbuf->desc_vptr);
-                       /* Forward to current frame. */
-                       pck_desc += pbuf->frames;
-                       pck_desc->frm_ofs = (pbuf->phy_addr -
-                                               pshm_drv->shm_base_addr) +
-                                                               pbuf->frm_ofs;
-                       pck_desc->frm_len = frmlen;
-                       /* Terminate packet descriptor area. */
-                       pck_desc++;
-                       pck_desc->frm_ofs = 0;
-                       /* Update buffer parameters. */
-                       pbuf->frames++;
-                       pbuf->frm_ofs += frmlen + (frmlen % 32);
-
-               } while (pbuf->frames < SHM_MAX_FRMS_PER_BUF);
-
-               /* Assign buffer as full. */
-               list_add_tail(&pbuf->list, &pshm_drv->tx_full_list);
-               append = 0;
-               mbox_msg |= SHM_SET_FULL(pbuf->index);
-send_msg:
-               spin_unlock_irqrestore(&pshm_drv->lock, flags);
-
-               if (mbox_msg)
-                       pshm_drv->pshm_dev->pshmdev_mbxsend
-                                       (pshm_drv->pshm_dev->shm_id, mbox_msg);
-       } while (mbox_msg);
-}
-
-static int shm_netdev_tx(struct sk_buff *skb, struct net_device *shm_netdev)
-{
-       struct shmdrv_layer *pshm_drv;
-
-       pshm_drv = netdev_priv(shm_netdev);
-
-       skb_queue_tail(&pshm_drv->sk_qhead, skb);
-
-       /* Schedule Tx work queue. for deferred processing of skbs*/
-       if (!work_pending(&pshm_drv->shm_tx_work))
-               queue_work(pshm_drv->pshm_tx_workqueue, &pshm_drv->shm_tx_work);
-
-       return 0;
-}
-
-static const struct net_device_ops netdev_ops = {
-       .ndo_open = shm_netdev_open,
-       .ndo_stop = shm_netdev_close,
-       .ndo_start_xmit = shm_netdev_tx,
-};
-
-static void shm_netdev_setup(struct net_device *pshm_netdev)
-{
-       struct shmdrv_layer *pshm_drv;
-       pshm_netdev->netdev_ops = &netdev_ops;
-
-       pshm_netdev->mtu = CAIF_MAX_MTU;
-       pshm_netdev->type = ARPHRD_CAIF;
-       pshm_netdev->hard_header_len = CAIF_NEEDED_HEADROOM;
-       pshm_netdev->tx_queue_len = 0;
-       pshm_netdev->destructor = free_netdev;
-
-       pshm_drv = netdev_priv(pshm_netdev);
-
-       /* Initialize structures in a clean state. */
-       memset(pshm_drv, 0, sizeof(struct shmdrv_layer));
-
-       pshm_drv->cfdev.link_select = CAIF_LINK_LOW_LATENCY;
-}
-
-int caif_shmcore_probe(struct shmdev_layer *pshm_dev)
-{
-       int result, j;
-       struct shmdrv_layer *pshm_drv = NULL;
-
-       pshm_dev->pshm_netdev = alloc_netdev(sizeof(struct shmdrv_layer),
-                                               "cfshm%d", shm_netdev_setup);
-       if (!pshm_dev->pshm_netdev)
-               return -ENOMEM;
-
-       pshm_drv = netdev_priv(pshm_dev->pshm_netdev);
-       pshm_drv->pshm_dev = pshm_dev;
-
-       /*
-        * Initialization starts with the verification of the
-        * availability of MBX driver by calling its setup function.
-        * MBX driver must be available by this time for proper
-        * functioning of SHM driver.
-        */
-       if ((pshm_dev->pshmdev_mbxsetup
-                               (caif_shmdrv_rx_cb, pshm_dev, pshm_drv)) != 0) {
-               pr_warn("Could not config. SHM Mailbox,"
-                               " Bailing out.....\n");
-               free_netdev(pshm_dev->pshm_netdev);
-               return -ENODEV;
-       }
-
-       skb_queue_head_init(&pshm_drv->sk_qhead);
-
-       pr_info("SHM DEVICE[%d] PROBED BY DRIVER, NEW SHM DRIVER"
-                       " INSTANCE AT pshm_drv =0x%p\n",
-                       pshm_drv->pshm_dev->shm_id, pshm_drv);
-
-       if (pshm_dev->shm_total_sz <
-                       (NR_TX_BUF * TX_BUF_SZ + NR_RX_BUF * RX_BUF_SZ)) {
-
-               pr_warn("ERROR, Amount of available"
-                               " Phys. SHM cannot accommodate current SHM "
-                               "driver configuration, Bailing out ...\n");
-               free_netdev(pshm_dev->pshm_netdev);
-               return -ENOMEM;
-       }
-
-       pshm_drv->shm_base_addr = pshm_dev->shm_base_addr;
-       pshm_drv->shm_tx_addr = pshm_drv->shm_base_addr;
-
-       if (pshm_dev->shm_loopback)
-               pshm_drv->shm_rx_addr = pshm_drv->shm_tx_addr;
-       else
-               pshm_drv->shm_rx_addr = pshm_dev->shm_base_addr +
-                                               (NR_TX_BUF * TX_BUF_SZ);
-
-       spin_lock_init(&pshm_drv->lock);
-       INIT_LIST_HEAD(&pshm_drv->tx_empty_list);
-       INIT_LIST_HEAD(&pshm_drv->tx_pend_list);
-       INIT_LIST_HEAD(&pshm_drv->tx_full_list);
-
-       INIT_LIST_HEAD(&pshm_drv->rx_empty_list);
-       INIT_LIST_HEAD(&pshm_drv->rx_pend_list);
-       INIT_LIST_HEAD(&pshm_drv->rx_full_list);
-
-       INIT_WORK(&pshm_drv->shm_tx_work, shm_tx_work_func);
-       INIT_WORK(&pshm_drv->shm_rx_work, shm_rx_work_func);
-
-       pshm_drv->pshm_tx_workqueue =
-                               create_singlethread_workqueue("shm_tx_work");
-       pshm_drv->pshm_rx_workqueue =
-                               create_singlethread_workqueue("shm_rx_work");
-
-       for (j = 0; j < NR_TX_BUF; j++) {
-               struct buf_list *tx_buf =
-                               kmalloc(sizeof(struct buf_list), GFP_KERNEL);
-
-               if (tx_buf == NULL) {
-                       free_netdev(pshm_dev->pshm_netdev);
-                       return -ENOMEM;
-               }
-               tx_buf->index = j;
-               tx_buf->phy_addr = pshm_drv->shm_tx_addr + (TX_BUF_SZ * j);
-               tx_buf->len = TX_BUF_SZ;
-               tx_buf->frames = 0;
-               tx_buf->frm_ofs = SHM_CAIF_FRM_OFS;
-
-               if (pshm_dev->shm_loopback)
-                       tx_buf->desc_vptr = (unsigned char *)tx_buf->phy_addr;
-               else
-                       /*
-                        * FIXME: the result of ioremap is not a pointer - arnd
-                        */
-                       tx_buf->desc_vptr =
-                                       ioremap(tx_buf->phy_addr, TX_BUF_SZ);
-
-               list_add_tail(&tx_buf->list, &pshm_drv->tx_empty_list);
-       }
-
-       for (j = 0; j < NR_RX_BUF; j++) {
-               struct buf_list *rx_buf =
-                               kmalloc(sizeof(struct buf_list), GFP_KERNEL);
-
-               if (rx_buf == NULL) {
-                       free_netdev(pshm_dev->pshm_netdev);
-                       return -ENOMEM;
-               }
-               rx_buf->index = j;
-               rx_buf->phy_addr = pshm_drv->shm_rx_addr + (RX_BUF_SZ * j);
-               rx_buf->len = RX_BUF_SZ;
-
-               if (pshm_dev->shm_loopback)
-                       rx_buf->desc_vptr = (unsigned char *)rx_buf->phy_addr;
-               else
-                       rx_buf->desc_vptr =
-                                       ioremap(rx_buf->phy_addr, RX_BUF_SZ);
-               list_add_tail(&rx_buf->list, &pshm_drv->rx_empty_list);
-       }
-
-       pshm_drv->tx_empty_available = 1;
-       result = register_netdev(pshm_dev->pshm_netdev);
-       if (result)
-               pr_warn("ERROR[%d], SHM could not, "
-                       "register with NW FRMWK Bailing out ...\n", result);
-
-       return result;
-}
-
-void caif_shmcore_remove(struct net_device *pshm_netdev)
-{
-       struct buf_list *pbuf;
-       struct shmdrv_layer *pshm_drv = NULL;
-
-       pshm_drv = netdev_priv(pshm_netdev);
-
-       while (!(list_empty(&pshm_drv->tx_pend_list))) {
-               pbuf =
-                       list_entry(pshm_drv->tx_pend_list.next,
-                                       struct buf_list, list);
-
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       while (!(list_empty(&pshm_drv->tx_full_list))) {
-               pbuf =
-                       list_entry(pshm_drv->tx_full_list.next,
-                                       struct buf_list, list);
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       while (!(list_empty(&pshm_drv->tx_empty_list))) {
-               pbuf =
-                       list_entry(pshm_drv->tx_empty_list.next,
-                                       struct buf_list, list);
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       while (!(list_empty(&pshm_drv->rx_full_list))) {
-               pbuf =
-                       list_entry(pshm_drv->tx_full_list.next,
-                               struct buf_list, list);
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       while (!(list_empty(&pshm_drv->rx_pend_list))) {
-               pbuf =
-                       list_entry(pshm_drv->tx_pend_list.next,
-                               struct buf_list, list);
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       while (!(list_empty(&pshm_drv->rx_empty_list))) {
-               pbuf =
-                       list_entry(pshm_drv->rx_empty_list.next,
-                               struct buf_list, list);
-               list_del(&pbuf->list);
-               kfree(pbuf);
-       }
-
-       /* Destroy work queues. */
-       destroy_workqueue(pshm_drv->pshm_tx_workqueue);
-       destroy_workqueue(pshm_drv->pshm_rx_workqueue);
-
-       unregister_netdev(pshm_netdev);
-}
diff --git a/include/net/caif/caif_shm.h b/include/net/caif/caif_shm.h
deleted file mode 100644 (file)
index 5bcce55..0000000
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) ST-Ericsson AB 2010
- * Contact: Sjur Brendeland / sjur.brandeland@stericsson.com
- * Author: Amarnath Revanna / amarnath.bangalore.revanna@stericsson.com
- * License terms: GNU General Public License (GPL) version 2
- */
-
-#ifndef CAIF_SHM_H_
-#define CAIF_SHM_H_
-
-struct shmdev_layer {
-       u32 shm_base_addr;
-       u32 shm_total_sz;
-       u32 shm_id;
-       u32 shm_loopback;
-       void *hmbx;
-       int (*pshmdev_mbxsend) (u32 shm_id, u32 mbx_msg);
-       int (*pshmdev_mbxsetup) (void *pshmdrv_cb,
-                               struct shmdev_layer *pshm_dev, void *pshm_drv);
-       struct net_device *pshm_netdev;
-};
-
-extern int caif_shmcore_probe(struct shmdev_layer *pshm_dev);
-extern void caif_shmcore_remove(struct net_device *pshm_netdev);
-
-#endif