--- /dev/null
+/*
+ * Copyright (c) 2010 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.
+ */
+
+/*******************************************************************************
+ * Communicates with the dongle by using dcmd codes.
+ * For certain dcmd codes, the dongle interprets string data from the host.
+ ******************************************************************************/
+
+#include <linux/types.h>
+#include <linux/netdevice.h>
+
+#include <brcmu_utils.h>
+#include <brcmu_wifi.h>
+
+#include "dhd.h"
+#include "dhd_proto.h"
+#include "dhd_bus.h"
+#include "fwsignal.h"
+#include "dhd_dbg.h"
+#include "tracepoint.h"
+
+struct brcmf_proto_cdc_dcmd {
+ __le32 cmd; /* dongle command value */
+ __le32 len; /* lower 16: output buflen;
+ * upper 16: input buflen (excludes header) */
+ __le32 flags; /* flag defns given below */
+ __le32 status; /* status code returned from the device */
+};
+
+/* Max valid buffer size that can be sent to the dongle */
+#define CDC_MAX_MSG_SIZE (ETH_FRAME_LEN+ETH_FCS_LEN)
+
+/* CDC flag definitions */
+#define CDC_DCMD_ERROR 0x01 /* 1=cmd failed */
+#define CDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */
+#define CDC_DCMD_IF_MASK 0xF000 /* I/F index */
+#define CDC_DCMD_IF_SHIFT 12
+#define CDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */
+#define CDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */
+#define CDC_DCMD_ID(flags) \
+ (((flags) & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT)
+
+/*
+ * BDC header - Broadcom specific extension of CDC.
+ * Used on data packets to convey priority across USB.
+ */
+#define BDC_HEADER_LEN 4
+#define BDC_PROTO_VER 2 /* Protocol version */
+#define BDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */
+#define BDC_FLAG_VER_SHIFT 4 /* Protocol version shift */
+#define BDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */
+#define BDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */
+#define BDC_PRIORITY_MASK 0x7
+#define BDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */
+#define BDC_FLAG2_IF_SHIFT 0
+
+#define BDC_GET_IF_IDX(hdr) \
+ ((int)((((hdr)->flags2) & BDC_FLAG2_IF_MASK) >> BDC_FLAG2_IF_SHIFT))
+#define BDC_SET_IF_IDX(hdr, idx) \
+ ((hdr)->flags2 = (((hdr)->flags2 & ~BDC_FLAG2_IF_MASK) | \
+ ((idx) << BDC_FLAG2_IF_SHIFT)))
+
+/**
+ * struct brcmf_proto_bdc_header - BDC header format
+ *
+ * @flags: flags contain protocol and checksum info.
+ * @priority: 802.1d priority and USB flow control info (bit 4:7).
+ * @flags2: additional flags containing dongle interface index.
+ * @data_offset: start of packet data. header is following by firmware signals.
+ */
+struct brcmf_proto_bdc_header {
+ u8 flags;
+ u8 priority;
+ u8 flags2;
+ u8 data_offset;
+};
+
+/*
+ * maximum length of firmware signal data between
+ * the BDC header and packet data in the tx path.
+ */
+#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12
+
+#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
+#define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE
+ * (amount of header tha might be added)
+ * plus any space that might be needed
+ * for bus alignment padding.
+ */
+#define ROUND_UP_MARGIN 2048 /* Biggest bus block size possible for
+ * round off at the end of buffer
+ * Currently is SDIO
+ */
+
+struct brcmf_proto {
+ u16 reqid;
+ u8 bus_header[BUS_HEADER_LEN];
+ struct brcmf_proto_cdc_dcmd msg;
+ unsigned char buf[BRCMF_DCMD_MAXLEN + ROUND_UP_MARGIN];
+};
+
+static int brcmf_proto_cdc_msg(struct brcmf_pub *drvr)
+{
+ struct brcmf_proto *prot = drvr->prot;
+ int len = le32_to_cpu(prot->msg.len) +
+ sizeof(struct brcmf_proto_cdc_dcmd);
+
+ brcmf_dbg(CDC, "Enter\n");
+
+ /* NOTE : cdc->msg.len holds the desired length of the buffer to be
+ * returned. Only up to CDC_MAX_MSG_SIZE of this buffer area
+ * is actually sent to the dongle
+ */
+ if (len > CDC_MAX_MSG_SIZE)
+ len = CDC_MAX_MSG_SIZE;
+
+ /* Send request */
+ return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&prot->msg, len);
+}
+
+static int brcmf_proto_cdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
+{
+ int ret;
+ struct brcmf_proto *prot = drvr->prot;
+
+ brcmf_dbg(CDC, "Enter\n");
+ len += sizeof(struct brcmf_proto_cdc_dcmd);
+ do {
+ ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&prot->msg,
+ len);
+ if (ret < 0)
+ break;
+ } while (CDC_DCMD_ID(le32_to_cpu(prot->msg.flags)) != id);
+
+ return ret;
+}
+
+int
+brcmf_proto_cdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
+ void *buf, uint len)
+{
+ struct brcmf_proto *prot = drvr->prot;
+ struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
+ void *info;
+ int ret = 0, retries = 0;
+ u32 id, flags;
+
+ brcmf_dbg(CDC, "Enter, cmd %d len %d\n", cmd, len);
+
+ memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
+
+ msg->cmd = cpu_to_le32(cmd);
+ msg->len = cpu_to_le32(len);
+ flags = (++prot->reqid << CDC_DCMD_ID_SHIFT);
+ flags = (flags & ~CDC_DCMD_IF_MASK) |
+ (ifidx << CDC_DCMD_IF_SHIFT);
+ msg->flags = cpu_to_le32(flags);
+
+ if (buf)
+ memcpy(prot->buf, buf, len);
+
+ ret = brcmf_proto_cdc_msg(drvr);
+ if (ret < 0) {
+ brcmf_err("brcmf_proto_cdc_msg failed w/status %d\n",
+ ret);
+ goto done;
+ }
+
+retry:
+ /* wait for interrupt and get first fragment */
+ ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
+ if (ret < 0)
+ goto done;
+
+ flags = le32_to_cpu(msg->flags);
+ id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
+
+ if ((id < prot->reqid) && (++retries < RETRIES))
+ goto retry;
+ if (id != prot->reqid) {
+ brcmf_err("%s: unexpected request id %d (expected %d)\n",
+ brcmf_ifname(drvr, ifidx), id, prot->reqid);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ /* Check info buffer */
+ info = (void *)&msg[1];
+
+ /* Copy info buffer */
+ if (buf) {
+ if (ret < (int)len)
+ len = ret;
+ memcpy(buf, info, len);
+ }
+
+ /* Check the ERROR flag */
+ if (flags & CDC_DCMD_ERROR)
+ ret = le32_to_cpu(msg->status);
+
+done:
+ return ret;
+}
+
+int brcmf_proto_cdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
+ void *buf, uint len)
+{
+ struct brcmf_proto *prot = drvr->prot;
+ struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
+ int ret = 0;
+ u32 flags, id;
+
+ brcmf_dbg(CDC, "Enter, cmd %d len %d\n", cmd, len);
+
+ memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
+
+ msg->cmd = cpu_to_le32(cmd);
+ msg->len = cpu_to_le32(len);
+ flags = (++prot->reqid << CDC_DCMD_ID_SHIFT) | CDC_DCMD_SET;
+ flags = (flags & ~CDC_DCMD_IF_MASK) |
+ (ifidx << CDC_DCMD_IF_SHIFT);
+ msg->flags = cpu_to_le32(flags);
+
+ if (buf)
+ memcpy(prot->buf, buf, len);
+
+ ret = brcmf_proto_cdc_msg(drvr);
+ if (ret < 0)
+ goto done;
+
+ ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
+ if (ret < 0)
+ goto done;
+
+ flags = le32_to_cpu(msg->flags);
+ id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
+
+ if (id != prot->reqid) {
+ brcmf_err("%s: unexpected request id %d (expected %d)\n",
+ brcmf_ifname(drvr, ifidx), id, prot->reqid);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ /* Check the ERROR flag */
+ if (flags & CDC_DCMD_ERROR)
+ ret = le32_to_cpu(msg->status);
+
+done:
+ return ret;
+}
+
+static bool pkt_sum_needed(struct sk_buff *skb)
+{
+ return skb->ip_summed == CHECKSUM_PARTIAL;
+}
+
+static void pkt_set_sum_good(struct sk_buff *skb, bool x)
+{
+ skb->ip_summed = (x ? CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
+}
+
+void brcmf_proto_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset,
+ struct sk_buff *pktbuf)
+{
+ struct brcmf_proto_bdc_header *h;
+
+ brcmf_dbg(CDC, "Enter\n");
+
+ /* Push BDC header used to convey priority for buses that don't */
+ skb_push(pktbuf, BDC_HEADER_LEN);
+
+ h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
+
+ h->flags = (BDC_PROTO_VER << BDC_FLAG_VER_SHIFT);
+ if (pkt_sum_needed(pktbuf))
+ h->flags |= BDC_FLAG_SUM_NEEDED;
+
+ h->priority = (pktbuf->priority & BDC_PRIORITY_MASK);
+ h->flags2 = 0;
+ h->data_offset = offset;
+ BDC_SET_IF_IDX(h, ifidx);
+ trace_brcmf_bdchdr(pktbuf->data);
+}
+
+int brcmf_proto_hdrpull(struct brcmf_pub *drvr, bool do_fws, u8 *ifidx,
+ struct sk_buff *pktbuf)
+{
+ struct brcmf_proto_bdc_header *h;
+
+ brcmf_dbg(CDC, "Enter\n");
+
+ /* Pop BDC header used to convey priority for buses that don't */
+
+ if (pktbuf->len <= BDC_HEADER_LEN) {
+ brcmf_dbg(INFO, "rx data too short (%d <= %d)\n",
+ pktbuf->len, BDC_HEADER_LEN);
+ return -EBADE;
+ }
+
+ trace_brcmf_bdchdr(pktbuf->data);
+ h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
+
+ *ifidx = BDC_GET_IF_IDX(h);
+ if (*ifidx >= BRCMF_MAX_IFS) {
+ brcmf_err("rx data ifnum out of range (%d)\n", *ifidx);
+ return -EBADE;
+ }
+ /* The ifidx is the idx to map to matching netdev/ifp. When receiving
+ * events this is easy because it contains the bssidx which maps
+ * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
+ * bssidx 1 is used for p2p0 and no data can be received or
+ * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
+ */
+ if (*ifidx)
+ (*ifidx)++;
+
+ if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) !=
+ BDC_PROTO_VER) {
+ brcmf_err("%s: non-BDC packet received, flags 0x%x\n",
+ brcmf_ifname(drvr, *ifidx), h->flags);
+ return -EBADE;
+ }
+
+ if (h->flags & BDC_FLAG_SUM_GOOD) {
+ brcmf_dbg(CDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
+ brcmf_ifname(drvr, *ifidx), h->flags);
+ pkt_set_sum_good(pktbuf, true);
+ }
+
+ pktbuf->priority = h->priority & BDC_PRIORITY_MASK;
+
+ skb_pull(pktbuf, BDC_HEADER_LEN);
+ if (do_fws)
+ brcmf_fws_hdrpull(drvr, *ifidx, h->data_offset << 2, pktbuf);
+ else
+ skb_pull(pktbuf, h->data_offset << 2);
+
+ if (pktbuf->len == 0)
+ return -ENODATA;
+ return 0;
+}
+
+int brcmf_proto_attach(struct brcmf_pub *drvr)
+{
+ struct brcmf_proto *cdc;
+
+ cdc = kzalloc(sizeof(struct brcmf_proto), GFP_ATOMIC);
+ if (!cdc)
+ goto fail;
+
+ /* ensure that the msg buf directly follows the cdc msg struct */
+ if ((unsigned long)(&cdc->msg + 1) != (unsigned long)cdc->buf) {
+ brcmf_err("struct brcmf_proto is not correctly defined\n");
+ goto fail;
+ }
+
+ drvr->prot = cdc;
+ drvr->hdrlen += BDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES;
+ drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN +
+ sizeof(struct brcmf_proto_cdc_dcmd) + ROUND_UP_MARGIN;
+ return 0;
+
+fail:
+ kfree(cdc);
+ return -ENOMEM;
+}
+
+/* ~NOTE~ What if another thread is waiting on the semaphore? Holding it? */
+void brcmf_proto_detach(struct brcmf_pub *drvr)
+{
+ kfree(drvr->prot);
+ drvr->prot = NULL;
+}
+++ /dev/null
-/*
- * Copyright (c) 2010 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.
- */
-
-/*******************************************************************************
- * Communicates with the dongle by using dcmd codes.
- * For certain dcmd codes, the dongle interprets string data from the host.
- ******************************************************************************/
-
-#include <linux/types.h>
-#include <linux/netdevice.h>
-
-#include <brcmu_utils.h>
-#include <brcmu_wifi.h>
-
-#include "dhd.h"
-#include "dhd_proto.h"
-#include "dhd_bus.h"
-#include "fwsignal.h"
-#include "dhd_dbg.h"
-#include "tracepoint.h"
-
-struct brcmf_proto_cdc_dcmd {
- __le32 cmd; /* dongle command value */
- __le32 len; /* lower 16: output buflen;
- * upper 16: input buflen (excludes header) */
- __le32 flags; /* flag defns given below */
- __le32 status; /* status code returned from the device */
-};
-
-/* Max valid buffer size that can be sent to the dongle */
-#define CDC_MAX_MSG_SIZE (ETH_FRAME_LEN+ETH_FCS_LEN)
-
-/* CDC flag definitions */
-#define CDC_DCMD_ERROR 0x01 /* 1=cmd failed */
-#define CDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */
-#define CDC_DCMD_IF_MASK 0xF000 /* I/F index */
-#define CDC_DCMD_IF_SHIFT 12
-#define CDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */
-#define CDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */
-#define CDC_DCMD_ID(flags) \
- (((flags) & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT)
-
-/*
- * BDC header - Broadcom specific extension of CDC.
- * Used on data packets to convey priority across USB.
- */
-#define BDC_HEADER_LEN 4
-#define BDC_PROTO_VER 2 /* Protocol version */
-#define BDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */
-#define BDC_FLAG_VER_SHIFT 4 /* Protocol version shift */
-#define BDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */
-#define BDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */
-#define BDC_PRIORITY_MASK 0x7
-#define BDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */
-#define BDC_FLAG2_IF_SHIFT 0
-
-#define BDC_GET_IF_IDX(hdr) \
- ((int)((((hdr)->flags2) & BDC_FLAG2_IF_MASK) >> BDC_FLAG2_IF_SHIFT))
-#define BDC_SET_IF_IDX(hdr, idx) \
- ((hdr)->flags2 = (((hdr)->flags2 & ~BDC_FLAG2_IF_MASK) | \
- ((idx) << BDC_FLAG2_IF_SHIFT)))
-
-/**
- * struct brcmf_proto_bdc_header - BDC header format
- *
- * @flags: flags contain protocol and checksum info.
- * @priority: 802.1d priority and USB flow control info (bit 4:7).
- * @flags2: additional flags containing dongle interface index.
- * @data_offset: start of packet data. header is following by firmware signals.
- */
-struct brcmf_proto_bdc_header {
- u8 flags;
- u8 priority;
- u8 flags2;
- u8 data_offset;
-};
-
-/*
- * maximum length of firmware signal data between
- * the BDC header and packet data in the tx path.
- */
-#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12
-
-#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
-#define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE
- * (amount of header tha might be added)
- * plus any space that might be needed
- * for bus alignment padding.
- */
-#define ROUND_UP_MARGIN 2048 /* Biggest bus block size possible for
- * round off at the end of buffer
- * Currently is SDIO
- */
-
-struct brcmf_proto {
- u16 reqid;
- u8 bus_header[BUS_HEADER_LEN];
- struct brcmf_proto_cdc_dcmd msg;
- unsigned char buf[BRCMF_DCMD_MAXLEN + ROUND_UP_MARGIN];
-};
-
-static int brcmf_proto_cdc_msg(struct brcmf_pub *drvr)
-{
- struct brcmf_proto *prot = drvr->prot;
- int len = le32_to_cpu(prot->msg.len) +
- sizeof(struct brcmf_proto_cdc_dcmd);
-
- brcmf_dbg(CDC, "Enter\n");
-
- /* NOTE : cdc->msg.len holds the desired length of the buffer to be
- * returned. Only up to CDC_MAX_MSG_SIZE of this buffer area
- * is actually sent to the dongle
- */
- if (len > CDC_MAX_MSG_SIZE)
- len = CDC_MAX_MSG_SIZE;
-
- /* Send request */
- return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&prot->msg, len);
-}
-
-static int brcmf_proto_cdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
-{
- int ret;
- struct brcmf_proto *prot = drvr->prot;
-
- brcmf_dbg(CDC, "Enter\n");
- len += sizeof(struct brcmf_proto_cdc_dcmd);
- do {
- ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&prot->msg,
- len);
- if (ret < 0)
- break;
- } while (CDC_DCMD_ID(le32_to_cpu(prot->msg.flags)) != id);
-
- return ret;
-}
-
-int
-brcmf_proto_cdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
- void *buf, uint len)
-{
- struct brcmf_proto *prot = drvr->prot;
- struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
- void *info;
- int ret = 0, retries = 0;
- u32 id, flags;
-
- brcmf_dbg(CDC, "Enter, cmd %d len %d\n", cmd, len);
-
- memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
-
- msg->cmd = cpu_to_le32(cmd);
- msg->len = cpu_to_le32(len);
- flags = (++prot->reqid << CDC_DCMD_ID_SHIFT);
- flags = (flags & ~CDC_DCMD_IF_MASK) |
- (ifidx << CDC_DCMD_IF_SHIFT);
- msg->flags = cpu_to_le32(flags);
-
- if (buf)
- memcpy(prot->buf, buf, len);
-
- ret = brcmf_proto_cdc_msg(drvr);
- if (ret < 0) {
- brcmf_err("brcmf_proto_cdc_msg failed w/status %d\n",
- ret);
- goto done;
- }
-
-retry:
- /* wait for interrupt and get first fragment */
- ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
- if (ret < 0)
- goto done;
-
- flags = le32_to_cpu(msg->flags);
- id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
-
- if ((id < prot->reqid) && (++retries < RETRIES))
- goto retry;
- if (id != prot->reqid) {
- brcmf_err("%s: unexpected request id %d (expected %d)\n",
- brcmf_ifname(drvr, ifidx), id, prot->reqid);
- ret = -EINVAL;
- goto done;
- }
-
- /* Check info buffer */
- info = (void *)&msg[1];
-
- /* Copy info buffer */
- if (buf) {
- if (ret < (int)len)
- len = ret;
- memcpy(buf, info, len);
- }
-
- /* Check the ERROR flag */
- if (flags & CDC_DCMD_ERROR)
- ret = le32_to_cpu(msg->status);
-
-done:
- return ret;
-}
-
-int brcmf_proto_cdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
- void *buf, uint len)
-{
- struct brcmf_proto *prot = drvr->prot;
- struct brcmf_proto_cdc_dcmd *msg = &prot->msg;
- int ret = 0;
- u32 flags, id;
-
- brcmf_dbg(CDC, "Enter, cmd %d len %d\n", cmd, len);
-
- memset(msg, 0, sizeof(struct brcmf_proto_cdc_dcmd));
-
- msg->cmd = cpu_to_le32(cmd);
- msg->len = cpu_to_le32(len);
- flags = (++prot->reqid << CDC_DCMD_ID_SHIFT) | CDC_DCMD_SET;
- flags = (flags & ~CDC_DCMD_IF_MASK) |
- (ifidx << CDC_DCMD_IF_SHIFT);
- msg->flags = cpu_to_le32(flags);
-
- if (buf)
- memcpy(prot->buf, buf, len);
-
- ret = brcmf_proto_cdc_msg(drvr);
- if (ret < 0)
- goto done;
-
- ret = brcmf_proto_cdc_cmplt(drvr, prot->reqid, len);
- if (ret < 0)
- goto done;
-
- flags = le32_to_cpu(msg->flags);
- id = (flags & CDC_DCMD_ID_MASK) >> CDC_DCMD_ID_SHIFT;
-
- if (id != prot->reqid) {
- brcmf_err("%s: unexpected request id %d (expected %d)\n",
- brcmf_ifname(drvr, ifidx), id, prot->reqid);
- ret = -EINVAL;
- goto done;
- }
-
- /* Check the ERROR flag */
- if (flags & CDC_DCMD_ERROR)
- ret = le32_to_cpu(msg->status);
-
-done:
- return ret;
-}
-
-static bool pkt_sum_needed(struct sk_buff *skb)
-{
- return skb->ip_summed == CHECKSUM_PARTIAL;
-}
-
-static void pkt_set_sum_good(struct sk_buff *skb, bool x)
-{
- skb->ip_summed = (x ? CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
-}
-
-void brcmf_proto_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset,
- struct sk_buff *pktbuf)
-{
- struct brcmf_proto_bdc_header *h;
-
- brcmf_dbg(CDC, "Enter\n");
-
- /* Push BDC header used to convey priority for buses that don't */
- skb_push(pktbuf, BDC_HEADER_LEN);
-
- h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
-
- h->flags = (BDC_PROTO_VER << BDC_FLAG_VER_SHIFT);
- if (pkt_sum_needed(pktbuf))
- h->flags |= BDC_FLAG_SUM_NEEDED;
-
- h->priority = (pktbuf->priority & BDC_PRIORITY_MASK);
- h->flags2 = 0;
- h->data_offset = offset;
- BDC_SET_IF_IDX(h, ifidx);
- trace_brcmf_bdchdr(pktbuf->data);
-}
-
-int brcmf_proto_hdrpull(struct brcmf_pub *drvr, bool do_fws, u8 *ifidx,
- struct sk_buff *pktbuf)
-{
- struct brcmf_proto_bdc_header *h;
-
- brcmf_dbg(CDC, "Enter\n");
-
- /* Pop BDC header used to convey priority for buses that don't */
-
- if (pktbuf->len <= BDC_HEADER_LEN) {
- brcmf_dbg(INFO, "rx data too short (%d <= %d)\n",
- pktbuf->len, BDC_HEADER_LEN);
- return -EBADE;
- }
-
- trace_brcmf_bdchdr(pktbuf->data);
- h = (struct brcmf_proto_bdc_header *)(pktbuf->data);
-
- *ifidx = BDC_GET_IF_IDX(h);
- if (*ifidx >= BRCMF_MAX_IFS) {
- brcmf_err("rx data ifnum out of range (%d)\n", *ifidx);
- return -EBADE;
- }
- /* The ifidx is the idx to map to matching netdev/ifp. When receiving
- * events this is easy because it contains the bssidx which maps
- * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
- * bssidx 1 is used for p2p0 and no data can be received or
- * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
- */
- if (*ifidx)
- (*ifidx)++;
-
- if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) !=
- BDC_PROTO_VER) {
- brcmf_err("%s: non-BDC packet received, flags 0x%x\n",
- brcmf_ifname(drvr, *ifidx), h->flags);
- return -EBADE;
- }
-
- if (h->flags & BDC_FLAG_SUM_GOOD) {
- brcmf_dbg(CDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
- brcmf_ifname(drvr, *ifidx), h->flags);
- pkt_set_sum_good(pktbuf, true);
- }
-
- pktbuf->priority = h->priority & BDC_PRIORITY_MASK;
-
- skb_pull(pktbuf, BDC_HEADER_LEN);
- if (do_fws)
- brcmf_fws_hdrpull(drvr, *ifidx, h->data_offset << 2, pktbuf);
- else
- skb_pull(pktbuf, h->data_offset << 2);
-
- if (pktbuf->len == 0)
- return -ENODATA;
- return 0;
-}
-
-int brcmf_proto_attach(struct brcmf_pub *drvr)
-{
- struct brcmf_proto *cdc;
-
- cdc = kzalloc(sizeof(struct brcmf_proto), GFP_ATOMIC);
- if (!cdc)
- goto fail;
-
- /* ensure that the msg buf directly follows the cdc msg struct */
- if ((unsigned long)(&cdc->msg + 1) != (unsigned long)cdc->buf) {
- brcmf_err("struct brcmf_proto is not correctly defined\n");
- goto fail;
- }
-
- drvr->prot = cdc;
- drvr->hdrlen += BDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES;
- drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN +
- sizeof(struct brcmf_proto_cdc_dcmd) + ROUND_UP_MARGIN;
- return 0;
-
-fail:
- kfree(cdc);
- return -ENOMEM;
-}
-
-/* ~NOTE~ What if another thread is waiting on the semaphore? Holding it? */
-void brcmf_proto_detach(struct brcmf_pub *drvr)
-{
- kfree(drvr->prot);
- drvr->prot = NULL;
-}
projects / mirror_ubuntu-eoan-kernel.git / commitdiff