491 lines
12 KiB
C
491 lines
12 KiB
C
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// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2010 Broadcom Corporation
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*/
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/*******************************************************************************
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* Communicates with the dongle by using dcmd codes.
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* For certain dcmd codes, the dongle interprets string data from the host.
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******************************************************************************/
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <brcmu_utils.h>
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#include <brcmu_wifi.h>
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#include "core.h"
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#include "bus.h"
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#include "fwsignal.h"
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#include "debug.h"
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#include "tracepoint.h"
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#include "proto.h"
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#include "bcdc.h"
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struct brcmf_proto_bcdc_dcmd {
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__le32 cmd; /* dongle command value */
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__le32 len; /* lower 16: output buflen;
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* upper 16: input buflen (excludes header) */
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__le32 flags; /* flag defns given below */
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__le32 status; /* status code returned from the device */
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};
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/* BCDC flag definitions */
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#define BCDC_DCMD_ERROR 0x01 /* 1=cmd failed */
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#define BCDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */
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#define BCDC_DCMD_IF_MASK 0xF000 /* I/F index */
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#define BCDC_DCMD_IF_SHIFT 12
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#define BCDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */
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#define BCDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */
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#define BCDC_DCMD_ID(flags) \
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(((flags) & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT)
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/*
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* BCDC header - Broadcom specific extension of CDC.
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* Used on data packets to convey priority across USB.
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*/
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#define BCDC_HEADER_LEN 4
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#define BCDC_PROTO_VER 2 /* Protocol version */
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#define BCDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */
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#define BCDC_FLAG_VER_SHIFT 4 /* Protocol version shift */
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#define BCDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */
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#define BCDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */
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#define BCDC_PRIORITY_MASK 0x7
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#define BCDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */
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#define BCDC_FLAG2_IF_SHIFT 0
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#define BCDC_GET_IF_IDX(hdr) \
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((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT))
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#define BCDC_SET_IF_IDX(hdr, idx) \
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((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) | \
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((idx) << BCDC_FLAG2_IF_SHIFT)))
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/**
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* struct brcmf_proto_bcdc_header - BCDC header format
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*
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* @flags: flags contain protocol and checksum info.
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* @priority: 802.1d priority and USB flow control info (bit 4:7).
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* @flags2: additional flags containing dongle interface index.
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* @data_offset: start of packet data. header is following by firmware signals.
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*/
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struct brcmf_proto_bcdc_header {
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u8 flags;
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u8 priority;
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u8 flags2;
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u8 data_offset;
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};
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/*
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* maximum length of firmware signal data between
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* the BCDC header and packet data in the tx path.
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*/
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#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12
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#define RETRIES 2 /* # of retries to retrieve matching dcmd response */
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#define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE
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* (amount of header tha might be added)
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* plus any space that might be needed
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* for bus alignment padding.
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*/
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#define ROUND_UP_MARGIN 2048
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struct brcmf_bcdc {
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u16 reqid;
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u8 bus_header[BUS_HEADER_LEN];
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struct brcmf_proto_bcdc_dcmd msg;
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unsigned char buf[BRCMF_DCMD_MAXLEN];
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struct brcmf_fws_info *fws;
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};
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struct brcmf_fws_info *drvr_to_fws(struct brcmf_pub *drvr)
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{
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struct brcmf_bcdc *bcdc = drvr->proto->pd;
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return bcdc->fws;
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}
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static int
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brcmf_proto_bcdc_msg(struct brcmf_pub *drvr, int ifidx, uint cmd, void *buf,
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uint len, bool set)
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{
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struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
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struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
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u32 flags;
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brcmf_dbg(BCDC, "Enter\n");
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memset(msg, 0, sizeof(struct brcmf_proto_bcdc_dcmd));
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msg->cmd = cpu_to_le32(cmd);
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msg->len = cpu_to_le32(len);
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flags = (++bcdc->reqid << BCDC_DCMD_ID_SHIFT);
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if (set)
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flags |= BCDC_DCMD_SET;
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flags = (flags & ~BCDC_DCMD_IF_MASK) |
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(ifidx << BCDC_DCMD_IF_SHIFT);
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msg->flags = cpu_to_le32(flags);
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if (buf)
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memcpy(bcdc->buf, buf, len);
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len += sizeof(*msg);
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if (len > BRCMF_TX_IOCTL_MAX_MSG_SIZE)
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len = BRCMF_TX_IOCTL_MAX_MSG_SIZE;
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/* Send request */
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return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&bcdc->msg, len);
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}
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static int brcmf_proto_bcdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len)
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{
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int ret;
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struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
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brcmf_dbg(BCDC, "Enter\n");
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len += sizeof(struct brcmf_proto_bcdc_dcmd);
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do {
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ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&bcdc->msg,
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len);
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if (ret < 0)
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break;
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} while (BCDC_DCMD_ID(le32_to_cpu(bcdc->msg.flags)) != id);
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return ret;
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}
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static int
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brcmf_proto_bcdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
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void *buf, uint len, int *fwerr)
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{
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struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
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struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
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void *info;
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int ret = 0, retries = 0;
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u32 id, flags;
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brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);
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*fwerr = 0;
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ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, false);
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if (ret < 0) {
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bphy_err(drvr, "brcmf_proto_bcdc_msg failed w/status %d\n",
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ret);
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goto done;
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}
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retry:
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/* wait for interrupt and get first fragment */
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ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
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if (ret < 0)
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goto done;
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flags = le32_to_cpu(msg->flags);
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id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;
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if ((id < bcdc->reqid) && (++retries < RETRIES))
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goto retry;
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if (id != bcdc->reqid) {
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bphy_err(drvr, "%s: unexpected request id %d (expected %d)\n",
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brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
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bcdc->reqid);
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ret = -EINVAL;
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goto done;
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}
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/* Check info buffer */
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info = (void *)&bcdc->buf[0];
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/* Copy info buffer */
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if (buf) {
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if (ret < (int)len)
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len = ret;
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memcpy(buf, info, len);
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}
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ret = 0;
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/* Check the ERROR flag */
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if (flags & BCDC_DCMD_ERROR)
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*fwerr = le32_to_cpu(msg->status);
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done:
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return ret;
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}
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static int
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brcmf_proto_bcdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd,
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void *buf, uint len, int *fwerr)
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{
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struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd;
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struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg;
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int ret;
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u32 flags, id;
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brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len);
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*fwerr = 0;
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ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, true);
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if (ret < 0)
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goto done;
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ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len);
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if (ret < 0)
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goto done;
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flags = le32_to_cpu(msg->flags);
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id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT;
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if (id != bcdc->reqid) {
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bphy_err(drvr, "%s: unexpected request id %d (expected %d)\n",
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brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id,
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bcdc->reqid);
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ret = -EINVAL;
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goto done;
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}
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ret = 0;
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/* Check the ERROR flag */
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if (flags & BCDC_DCMD_ERROR)
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*fwerr = le32_to_cpu(msg->status);
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done:
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return ret;
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}
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static void
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brcmf_proto_bcdc_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset,
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struct sk_buff *pktbuf)
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{
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struct brcmf_proto_bcdc_header *h;
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brcmf_dbg(BCDC, "Enter\n");
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/* Push BDC header used to convey priority for buses that don't */
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skb_push(pktbuf, BCDC_HEADER_LEN);
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h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);
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h->flags = (BCDC_PROTO_VER << BCDC_FLAG_VER_SHIFT);
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if (pktbuf->ip_summed == CHECKSUM_PARTIAL)
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h->flags |= BCDC_FLAG_SUM_NEEDED;
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h->priority = (pktbuf->priority & BCDC_PRIORITY_MASK);
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h->flags2 = 0;
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h->data_offset = offset;
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BCDC_SET_IF_IDX(h, ifidx);
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trace_brcmf_bcdchdr(pktbuf->data);
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}
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static int
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brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool do_fws,
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struct sk_buff *pktbuf, struct brcmf_if **ifp)
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{
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struct brcmf_proto_bcdc_header *h;
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struct brcmf_if *tmp_if;
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brcmf_dbg(BCDC, "Enter\n");
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/* Pop BCDC header used to convey priority for buses that don't */
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if (pktbuf->len <= BCDC_HEADER_LEN) {
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brcmf_dbg(INFO, "rx data too short (%d <= %d)\n",
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pktbuf->len, BCDC_HEADER_LEN);
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return -EBADE;
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}
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trace_brcmf_bcdchdr(pktbuf->data);
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h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);
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tmp_if = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h));
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if (!tmp_if) {
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brcmf_dbg(INFO, "no matching ifp found\n");
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return -EBADE;
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}
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if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) !=
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BCDC_PROTO_VER) {
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bphy_err(drvr, "%s: non-BCDC packet received, flags 0x%x\n",
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brcmf_ifname(tmp_if), h->flags);
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return -EBADE;
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}
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if (h->flags & BCDC_FLAG_SUM_GOOD) {
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brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
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brcmf_ifname(tmp_if), h->flags);
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pktbuf->ip_summed = CHECKSUM_UNNECESSARY;
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}
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pktbuf->priority = h->priority & BCDC_PRIORITY_MASK;
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skb_pull(pktbuf, BCDC_HEADER_LEN);
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if (do_fws)
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brcmf_fws_hdrpull(tmp_if, h->data_offset << 2, pktbuf);
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else
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skb_pull(pktbuf, h->data_offset << 2);
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if (pktbuf->len == 0)
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return -ENODATA;
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if (ifp != NULL)
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*ifp = tmp_if;
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return 0;
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}
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static int brcmf_proto_bcdc_tx_queue_data(struct brcmf_pub *drvr, int ifidx,
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struct sk_buff *skb)
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{
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struct brcmf_if *ifp = brcmf_get_ifp(drvr, ifidx);
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struct brcmf_bcdc *bcdc = drvr->proto->pd;
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if (!brcmf_fws_queue_skbs(bcdc->fws))
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return brcmf_proto_txdata(drvr, ifidx, 0, skb);
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return brcmf_fws_process_skb(ifp, skb);
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}
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static int
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brcmf_proto_bcdc_txdata(struct brcmf_pub *drvr, int ifidx, u8 offset,
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struct sk_buff *pktbuf)
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{
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brcmf_proto_bcdc_hdrpush(drvr, ifidx, offset, pktbuf);
|
||
|
|
return brcmf_bus_txdata(drvr->bus_if, pktbuf);
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcmf_proto_bcdc_txflowblock(struct device *dev, bool state)
|
||
|
|
{
|
||
|
|
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
|
||
|
|
struct brcmf_pub *drvr = bus_if->drvr;
|
||
|
|
|
||
|
|
brcmf_dbg(TRACE, "Enter\n");
|
||
|
|
|
||
|
|
brcmf_fws_bus_blocked(drvr, state);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
brcmf_proto_bcdc_txcomplete(struct device *dev, struct sk_buff *txp,
|
||
|
|
bool success)
|
||
|
|
{
|
||
|
|
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
|
||
|
|
struct brcmf_bcdc *bcdc = bus_if->drvr->proto->pd;
|
||
|
|
struct brcmf_if *ifp;
|
||
|
|
|
||
|
|
/* await txstatus signal for firmware if active */
|
||
|
|
if (brcmf_fws_fc_active(bcdc->fws)) {
|
||
|
|
brcmf_fws_bustxcomplete(bcdc->fws, txp, success);
|
||
|
|
} else {
|
||
|
|
if (brcmf_proto_bcdc_hdrpull(bus_if->drvr, false, txp, &ifp))
|
||
|
|
brcmu_pkt_buf_free_skb(txp);
|
||
|
|
else
|
||
|
|
brcmf_txfinalize(ifp, txp, success);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_configure_addr_mode(struct brcmf_pub *drvr, int ifidx,
|
||
|
|
enum proto_addr_mode addr_mode)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_delete_peer(struct brcmf_pub *drvr, int ifidx,
|
||
|
|
u8 peer[ETH_ALEN])
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_add_tdls_peer(struct brcmf_pub *drvr, int ifidx,
|
||
|
|
u8 peer[ETH_ALEN])
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static void brcmf_proto_bcdc_rxreorder(struct brcmf_if *ifp,
|
||
|
|
struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
brcmf_fws_rxreorder(ifp, skb);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_add_if(struct brcmf_if *ifp)
|
||
|
|
{
|
||
|
|
brcmf_fws_add_interface(ifp);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_del_if(struct brcmf_if *ifp)
|
||
|
|
{
|
||
|
|
brcmf_fws_del_interface(ifp);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
brcmf_proto_bcdc_reset_if(struct brcmf_if *ifp)
|
||
|
|
{
|
||
|
|
brcmf_fws_reset_interface(ifp);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
brcmf_proto_bcdc_init_done(struct brcmf_pub *drvr)
|
||
|
|
{
|
||
|
|
struct brcmf_bcdc *bcdc = drvr->proto->pd;
|
||
|
|
struct brcmf_fws_info *fws;
|
||
|
|
|
||
|
|
fws = brcmf_fws_attach(drvr);
|
||
|
|
if (IS_ERR(fws))
|
||
|
|
return PTR_ERR(fws);
|
||
|
|
|
||
|
|
bcdc->fws = fws;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void brcmf_proto_bcdc_debugfs_create(struct brcmf_pub *drvr)
|
||
|
|
{
|
||
|
|
brcmf_fws_debugfs_create(drvr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int brcmf_proto_bcdc_attach(struct brcmf_pub *drvr)
|
||
|
|
{
|
||
|
|
struct brcmf_bcdc *bcdc;
|
||
|
|
|
||
|
|
bcdc = kzalloc(sizeof(*bcdc), GFP_ATOMIC);
|
||
|
|
if (!bcdc)
|
||
|
|
goto fail;
|
||
|
|
|
||
|
|
/* ensure that the msg buf directly follows the cdc msg struct */
|
||
|
|
if ((unsigned long)(&bcdc->msg + 1) != (unsigned long)bcdc->buf) {
|
||
|
|
bphy_err(drvr, "struct brcmf_proto_bcdc is not correctly defined\n");
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
drvr->proto->hdrpull = brcmf_proto_bcdc_hdrpull;
|
||
|
|
drvr->proto->query_dcmd = brcmf_proto_bcdc_query_dcmd;
|
||
|
|
drvr->proto->set_dcmd = brcmf_proto_bcdc_set_dcmd;
|
||
|
|
drvr->proto->tx_queue_data = brcmf_proto_bcdc_tx_queue_data;
|
||
|
|
drvr->proto->txdata = brcmf_proto_bcdc_txdata;
|
||
|
|
drvr->proto->configure_addr_mode = brcmf_proto_bcdc_configure_addr_mode;
|
||
|
|
drvr->proto->delete_peer = brcmf_proto_bcdc_delete_peer;
|
||
|
|
drvr->proto->add_tdls_peer = brcmf_proto_bcdc_add_tdls_peer;
|
||
|
|
drvr->proto->rxreorder = brcmf_proto_bcdc_rxreorder;
|
||
|
|
drvr->proto->add_if = brcmf_proto_bcdc_add_if;
|
||
|
|
drvr->proto->del_if = brcmf_proto_bcdc_del_if;
|
||
|
|
drvr->proto->reset_if = brcmf_proto_bcdc_reset_if;
|
||
|
|
drvr->proto->init_done = brcmf_proto_bcdc_init_done;
|
||
|
|
drvr->proto->debugfs_create = brcmf_proto_bcdc_debugfs_create;
|
||
|
|
drvr->proto->pd = bcdc;
|
||
|
|
|
||
|
|
drvr->hdrlen += BCDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES;
|
||
|
|
drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN +
|
||
|
|
sizeof(struct brcmf_proto_bcdc_dcmd) + ROUND_UP_MARGIN;
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail:
|
||
|
|
kfree(bcdc);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
void brcmf_proto_bcdc_detach(struct brcmf_pub *drvr)
|
||
|
|
{
|
||
|
|
struct brcmf_bcdc *bcdc = drvr->proto->pd;
|
||
|
|
|
||
|
|
drvr->proto->pd = NULL;
|
||
|
|
brcmf_fws_detach(bcdc->fws);
|
||
|
|
kfree(bcdc);
|
||
|
|
}
|