uwb: Remove the WLP subsystem and drivers

The only Wimedia LLC Protocol (WLP) hardware was an Intel i1480 chip
with a beta release of firmware that was never commercially available as
a product.  This hardware and firmware is no longer available as Intel
sold their UWB/WLP IP.  I also see little prospect of other WLP
capable hardware ever being available.

Signed-off-by: David Vrabel <david.vrabel@csr.com>

1 files changed, 0 insertions, 354 deletions

diff --git a/drivers/uwb/wlp/txrx.c b/drivers/uwb/wlp/txrx.c
deleted file mode 100644
index 05dde44b359..00000000000
--- a/drivers/uwb/wlp/txrx.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- * Message exchange infrastructure
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <reinette.chatre@intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: Docs
- *
- */
-
-#include <linux/etherdevice.h>
-#include <linux/slab.h>
-#include <linux/wlp.h>
-
-#include "wlp-internal.h"
-
-/*
- * Direct incoming association msg to correct parsing routine
- *
- * We only expect D1, E1, C1, C3 messages as new. All other incoming
- * association messages should form part of an established session that is
- * handled elsewhere.
- * The handling of these messages often require calling sleeping functions
- * - this cannot be done in interrupt context. We use the kernel's
- * workqueue to handle these messages.
- */
-static
-void wlp_direct_assoc_frame(struct wlp *wlp, struct sk_buff *skb,
-			   struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *assoc = (void *) skb->data;
-	struct wlp_assoc_frame_ctx *frame_ctx;
-
-	frame_ctx = kmalloc(sizeof(*frame_ctx), GFP_ATOMIC);
-	if (frame_ctx == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for association "
-			"frame handling.\n");
-		kfree_skb(skb);
-		return;
-	}
-	frame_ctx->wlp = wlp;
-	frame_ctx->skb = skb;
-	frame_ctx->src = *src;
-	switch (assoc->type) {
-	case WLP_ASSOC_D1:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_d1_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	case WLP_ASSOC_E1:
-		kfree_skb(skb); /* Temporary until we handle it */
-		kfree(frame_ctx); /* Temporary until we handle it */
-		break;
-	case WLP_ASSOC_C1:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_c1_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	case WLP_ASSOC_C3:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_c3_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	default:
-		dev_err(dev, "Received unexpected association frame. "
-			"Type = %d \n", assoc->type);
-		kfree_skb(skb);
-		kfree(frame_ctx);
-		break;
-	}
-}
-
-/*
- * Process incoming association frame
- *
- * Although it could be possible to deal with some incoming association
- * messages without creating a new session we are keeping things simple. We
- * do not accept new association messages if there is a session in progress
- * and the messages do not belong to that session.
- *
- * If an association message arrives that causes the creation of a session
- * (WLP_ASSOC_E1) while we are in the process of creating a session then we
- * rely on the neighbor mutex to protect the data. That is, the new session
- * will not be started until the previous is completed.
- */
-static
-void wlp_receive_assoc_frame(struct wlp *wlp, struct sk_buff *skb,
-			     struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *assoc = (void *) skb->data;
-	struct wlp_session *session = wlp->session;
-	u8 version;
-
-	if (wlp_get_version(wlp, &assoc->version, &version,
-			    sizeof(assoc->version)) < 0)
-		goto error;
-	if (version != WLP_VERSION) {
-		dev_err(dev, "Unsupported WLP version in association "
-			"message.\n");
-		goto error;
-	}
-	if (session != NULL) {
-		/* Function that created this session is still holding the
-		 * &wlp->mutex to protect this session. */
-		if (assoc->type == session->exp_message ||
-		    assoc->type == WLP_ASSOC_F0) {
-			if (!memcmp(&session->neighbor_addr, src,
-				   sizeof(*src))) {
-				session->data = skb;
-				(session->cb)(wlp);
-			} else {
-				dev_err(dev, "Received expected message from "
-					"unexpected source.  Expected message "
-					"%d or F0 from %02x:%02x, but received "
-					"it from %02x:%02x. Dropping.\n",
-					session->exp_message,
-					session->neighbor_addr.data[1],
-					session->neighbor_addr.data[0],
-					src->data[1], src->data[0]);
-				goto error;
-			}
-		} else {
-			dev_err(dev, "Association already in progress. "
-				"Dropping.\n");
-			goto error;
-		}
-	} else {
-		wlp_direct_assoc_frame(wlp, skb, src);
-	}
-	return;
-error:
-	kfree_skb(skb);
-}
-
-/*
- * Verify incoming frame is from connected neighbor, prep to pass to WLP client
- *
- * Verification proceeds according to WLP 0.99 [7.3.1]. The source address
- * is used to determine which neighbor is sending the frame and the WSS tag
- * is used to know to which WSS the frame belongs (we only support one WSS
- * so this test is straight forward).
- * With the WSS found we need to ensure that we are connected before
- * allowing the exchange of data frames.
- */
-static
-int wlp_verify_prep_rx_frame(struct wlp *wlp, struct sk_buff *skb,
-			     struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = -EINVAL;
-	struct wlp_eda_node eda_entry;
-	struct wlp_frame_std_abbrv_hdr *hdr = (void *) skb->data;
-
-	/*verify*/
-	result = wlp_copy_eda_node(&wlp->eda, src, &eda_entry);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Incoming frame is from unknown "
-				"neighbor %02x:%02x.\n", src->data[1],
-				src->data[0]);
-		goto out;
-	}
-	if (hdr->tag != eda_entry.tag) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Tag of incoming frame from "
-				"%02x:%02x does not match expected tag. "
-				"Received 0x%02x, expected 0x%02x. \n",
-				src->data[1], src->data[0], hdr->tag,
-				eda_entry.tag);
-		result = -EINVAL;
-		goto out;
-	}
-	if (eda_entry.state != WLP_WSS_CONNECTED) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Incoming frame from "
-				"%02x:%02x does is not from connected WSS.\n",
-				src->data[1], src->data[0]);
-		result = -EINVAL;
-		goto out;
-	}
-	/*prep*/
-	skb_pull(skb, sizeof(*hdr));
-out:
-	return result;
-}
-
-/*
- * Receive a WLP frame from device
- *
- * @returns: 1 if calling function should free the skb
- *           0 if it successfully handled skb and freed it
- *           0 if error occured, will free skb in this case
- */
-int wlp_receive_frame(struct device *dev, struct wlp *wlp, struct sk_buff *skb,
-		      struct uwb_dev_addr *src)
-{
-	unsigned len = skb->len;
-	void *ptr = skb->data;
-	struct wlp_frame_hdr *hdr;
-	int result = 0;
-
-	if (len < sizeof(*hdr)) {
-		dev_err(dev, "Not enough data to parse WLP header.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	hdr = ptr;
-	if (le16_to_cpu(hdr->mux_hdr) != WLP_PROTOCOL_ID) {
-		dev_err(dev, "Not a WLP frame type.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	switch (hdr->type) {
-	case WLP_FRAME_STANDARD:
-		if (len < sizeof(struct wlp_frame_std_abbrv_hdr)) {
-			dev_err(dev, "Not enough data to parse Standard "
-				"WLP header.\n");
-			goto out;
-		}
-		result = wlp_verify_prep_rx_frame(wlp, skb, src);
-		if (result < 0) {
-			if (printk_ratelimit())
-				dev_err(dev, "WLP: Verification of frame "
-					"from neighbor %02x:%02x failed.\n",
-					src->data[1], src->data[0]);
-			goto out;
-		}
-		result = 1;
-		break;
-	case WLP_FRAME_ABBREVIATED:
-		dev_err(dev, "Abbreviated frame received. FIXME?\n");
-		kfree_skb(skb);
-		break;
-	case WLP_FRAME_CONTROL:
-		dev_err(dev, "Control frame received. FIXME?\n");
-		kfree_skb(skb);
-		break;
-	case WLP_FRAME_ASSOCIATION:
-		if (len < sizeof(struct wlp_frame_assoc)) {
-			dev_err(dev, "Not enough data to parse Association "
-				"WLP header.\n");
-			goto out;
-		}
-		wlp_receive_assoc_frame(wlp, skb, src);
-		break;
-	default:
-		dev_err(dev, "Invalid frame received.\n");
-		result = -EINVAL;
-		break;
-	}
-out:
-	if (result < 0) {
-		kfree_skb(skb);
-		result = 0;
-	}
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_receive_frame);
-
-
-/*
- * Verify frame from network stack, prepare for further transmission
- *
- * @skb:   the socket buffer that needs to be prepared for transmission (it
- *         is in need of a WLP header). If this is a broadcast frame we take
- *         over the entire transmission.
- *         If it is a unicast the WSS connection should already be established
- *         and transmission will be done by the calling function.
- * @dst:   On return this will contain the device address to which the
- *         frame is destined.
- * @returns: 0 on success no tx : WLP header successfully applied to skb buffer,
- *                                calling function can proceed with tx
- *           1 on success with tx : WLP will take over transmission of this
- *                                  frame
- *           <0 on error
- *
- * The network stack (WLP client) is attempting to transmit a frame. We can
- * only transmit data if a local WSS is at least active (connection will be
- * done here if this is a broadcast frame and neighbor also has the WSS
- * active).
- *
- * The frame can be either broadcast or unicast. Broadcast in a WSS is
- * supported via multicast, but we don't support multicast yet (until
- * devices start to support MAB IEs). If a broadcast frame needs to be
- * transmitted it is treated as a unicast frame to each neighbor. In this
- * case the WLP takes over transmission of the skb and returns 1
- * to the caller to indicate so. Also, in this case, if a neighbor has the
- * same WSS activated but is not connected then the WSS connection will be
- * done at this time. The neighbor's virtual address will be learned at
- * this time.
- *
- * The destination address in a unicast frame is the virtual address of the
- * neighbor. This address only becomes known when a WSS connection is
- * established. We thus rely on a broadcast frame to trigger the setup of
- * WSS connections to all neighbors before we are able to send unicast
- * frames to them. This seems reasonable as IP would usually use ARP first
- * before any unicast frames are sent.
- *
- * If we are already connected to the neighbor (neighbor's virtual address
- * is known) we just prepare the WLP header and the caller will continue to
- * send the frame.
- *
- * A failure in this function usually indicates something that cannot be
- * fixed automatically. So, if this function fails (@return < 0) the calling
- * function should not retry to send the frame as it will very likely keep
- * failing.
- *
- */
-int wlp_prepare_tx_frame(struct device *dev, struct wlp *wlp,
-			 struct sk_buff *skb, struct uwb_dev_addr *dst)
-{
-	int result = -EINVAL;
-	struct ethhdr *eth_hdr = (void *) skb->data;
-
-	if (is_multicast_ether_addr(eth_hdr->h_dest)) {
-		result = wlp_eda_for_each(&wlp->eda, wlp_wss_send_copy, skb);
-		if (result < 0) {
-			if (printk_ratelimit())
-				dev_err(dev, "Unable to handle broadcast "
-					"frame from WLP client.\n");
-			goto out;
-		}
-		dev_kfree_skb_irq(skb);
-		result = 1;
-		/* Frame will be transmitted by WLP. */
-	} else {
-		result = wlp_eda_for_virtual(&wlp->eda, eth_hdr->h_dest, dst,
-					     wlp_wss_prep_hdr, skb);
-		if (unlikely(result < 0)) {
-			if (printk_ratelimit())
-				dev_err(dev, "Unable to prepare "
-					"skb for transmission. \n");
-			goto out;
-		}
-	}
-out:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_prepare_tx_frame);