| /* |
| * 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 "core.h" |
| #include "bus.h" |
| #include "fwsignal.h" |
| #include "debug.h" |
| #include "tracepoint.h" |
| #include "proto.h" |
| #include "bcdc.h" |
| |
| struct brcmf_proto_bcdc_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 */ |
| }; |
| |
| /* BCDC flag definitions */ |
| #define BCDC_DCMD_ERROR 0x01 /* 1=cmd failed */ |
| #define BCDC_DCMD_SET 0x02 /* 0=get, 1=set cmd */ |
| #define BCDC_DCMD_IF_MASK 0xF000 /* I/F index */ |
| #define BCDC_DCMD_IF_SHIFT 12 |
| #define BCDC_DCMD_ID_MASK 0xFFFF0000 /* id an cmd pairing */ |
| #define BCDC_DCMD_ID_SHIFT 16 /* ID Mask shift bits */ |
| #define BCDC_DCMD_ID(flags) \ |
| (((flags) & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT) |
| |
| /* |
| * BCDC header - Broadcom specific extension of CDC. |
| * Used on data packets to convey priority across USB. |
| */ |
| #define BCDC_HEADER_LEN 4 |
| #define BCDC_PROTO_VER 2 /* Protocol version */ |
| #define BCDC_FLAG_VER_MASK 0xf0 /* Protocol version mask */ |
| #define BCDC_FLAG_VER_SHIFT 4 /* Protocol version shift */ |
| #define BCDC_FLAG_SUM_GOOD 0x04 /* Good RX checksums */ |
| #define BCDC_FLAG_SUM_NEEDED 0x08 /* Dongle needs to do TX checksums */ |
| #define BCDC_PRIORITY_MASK 0x7 |
| #define BCDC_FLAG2_IF_MASK 0x0f /* packet rx interface in APSTA */ |
| #define BCDC_FLAG2_IF_SHIFT 0 |
| |
| #define BCDC_GET_IF_IDX(hdr) \ |
| ((int)((((hdr)->flags2) & BCDC_FLAG2_IF_MASK) >> BCDC_FLAG2_IF_SHIFT)) |
| #define BCDC_SET_IF_IDX(hdr, idx) \ |
| ((hdr)->flags2 = (((hdr)->flags2 & ~BCDC_FLAG2_IF_MASK) | \ |
| ((idx) << BCDC_FLAG2_IF_SHIFT))) |
| |
| /** |
| * struct brcmf_proto_bcdc_header - BCDC 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_bcdc_header { |
| u8 flags; |
| u8 priority; |
| u8 flags2; |
| u8 data_offset; |
| }; |
| |
| /* |
| * maximum length of firmware signal data between |
| * the BCDC 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. |
| */ |
| struct brcmf_bcdc { |
| u16 reqid; |
| u8 bus_header[BUS_HEADER_LEN]; |
| struct brcmf_proto_bcdc_dcmd msg; |
| unsigned char buf[BRCMF_DCMD_MAXLEN]; |
| struct brcmf_fws_info *fws; |
| }; |
| |
| |
| struct brcmf_fws_info *drvr_to_fws(struct brcmf_pub *drvr) |
| { |
| struct brcmf_bcdc *bcdc = drvr->proto->pd; |
| |
| return bcdc->fws; |
| } |
| |
| static int |
| brcmf_proto_bcdc_msg(struct brcmf_pub *drvr, int ifidx, uint cmd, void *buf, |
| uint len, bool set) |
| { |
| struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; |
| struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; |
| u32 flags; |
| |
| brcmf_dbg(BCDC, "Enter\n"); |
| |
| memset(msg, 0, sizeof(struct brcmf_proto_bcdc_dcmd)); |
| |
| msg->cmd = cpu_to_le32(cmd); |
| msg->len = cpu_to_le32(len); |
| flags = (++bcdc->reqid << BCDC_DCMD_ID_SHIFT); |
| if (set) |
| flags |= BCDC_DCMD_SET; |
| flags = (flags & ~BCDC_DCMD_IF_MASK) | |
| (ifidx << BCDC_DCMD_IF_SHIFT); |
| msg->flags = cpu_to_le32(flags); |
| |
| if (buf) |
| memcpy(bcdc->buf, buf, len); |
| |
| len += sizeof(*msg); |
| if (len > BRCMF_TX_IOCTL_MAX_MSG_SIZE) |
| len = BRCMF_TX_IOCTL_MAX_MSG_SIZE; |
| |
| /* Send request */ |
| return brcmf_bus_txctl(drvr->bus_if, (unsigned char *)&bcdc->msg, len); |
| } |
| |
| static int brcmf_proto_bcdc_cmplt(struct brcmf_pub *drvr, u32 id, u32 len) |
| { |
| int ret; |
| struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; |
| |
| brcmf_dbg(BCDC, "Enter\n"); |
| len += sizeof(struct brcmf_proto_bcdc_dcmd); |
| do { |
| ret = brcmf_bus_rxctl(drvr->bus_if, (unsigned char *)&bcdc->msg, |
| len); |
| if (ret < 0) |
| break; |
| } while (BCDC_DCMD_ID(le32_to_cpu(bcdc->msg.flags)) != id); |
| |
| return ret; |
| } |
| |
| static int |
| brcmf_proto_bcdc_query_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd, |
| void *buf, uint len, int *fwerr) |
| { |
| struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; |
| struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; |
| void *info; |
| int ret = 0, retries = 0; |
| u32 id, flags; |
| |
| brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len); |
| |
| *fwerr = 0; |
| ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, false); |
| if (ret < 0) { |
| brcmf_err("brcmf_proto_bcdc_msg failed w/status %d\n", |
| ret); |
| goto done; |
| } |
| |
| retry: |
| /* wait for interrupt and get first fragment */ |
| ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len); |
| if (ret < 0) |
| goto done; |
| |
| flags = le32_to_cpu(msg->flags); |
| id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT; |
| |
| if ((id < bcdc->reqid) && (++retries < RETRIES)) |
| goto retry; |
| if (id != bcdc->reqid) { |
| brcmf_err("%s: unexpected request id %d (expected %d)\n", |
| brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id, |
| bcdc->reqid); |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| /* Check info buffer */ |
| info = (void *)&bcdc->buf[0]; |
| |
| /* Copy info buffer */ |
| if (buf) { |
| if (ret < (int)len) |
| len = ret; |
| memcpy(buf, info, len); |
| } |
| |
| ret = 0; |
| |
| /* Check the ERROR flag */ |
| if (flags & BCDC_DCMD_ERROR) |
| *fwerr = le32_to_cpu(msg->status); |
| done: |
| return ret; |
| } |
| |
| static int |
| brcmf_proto_bcdc_set_dcmd(struct brcmf_pub *drvr, int ifidx, uint cmd, |
| void *buf, uint len, int *fwerr) |
| { |
| struct brcmf_bcdc *bcdc = (struct brcmf_bcdc *)drvr->proto->pd; |
| struct brcmf_proto_bcdc_dcmd *msg = &bcdc->msg; |
| int ret; |
| u32 flags, id; |
| |
| brcmf_dbg(BCDC, "Enter, cmd %d len %d\n", cmd, len); |
| |
| *fwerr = 0; |
| ret = brcmf_proto_bcdc_msg(drvr, ifidx, cmd, buf, len, true); |
| if (ret < 0) |
| goto done; |
| |
| ret = brcmf_proto_bcdc_cmplt(drvr, bcdc->reqid, len); |
| if (ret < 0) |
| goto done; |
| |
| flags = le32_to_cpu(msg->flags); |
| id = (flags & BCDC_DCMD_ID_MASK) >> BCDC_DCMD_ID_SHIFT; |
| |
| if (id != bcdc->reqid) { |
| brcmf_err("%s: unexpected request id %d (expected %d)\n", |
| brcmf_ifname(brcmf_get_ifp(drvr, ifidx)), id, |
| bcdc->reqid); |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| ret = 0; |
| |
| /* Check the ERROR flag */ |
| if (flags & BCDC_DCMD_ERROR) |
| *fwerr = le32_to_cpu(msg->status); |
| |
| done: |
| return ret; |
| } |
| |
| static void |
| brcmf_proto_bcdc_hdrpush(struct brcmf_pub *drvr, int ifidx, u8 offset, |
| struct sk_buff *pktbuf) |
| { |
| struct brcmf_proto_bcdc_header *h; |
| |
| brcmf_dbg(BCDC, "Enter\n"); |
| |
| /* Push BDC header used to convey priority for buses that don't */ |
| skb_push(pktbuf, BCDC_HEADER_LEN); |
| |
| h = (struct brcmf_proto_bcdc_header *)(pktbuf->data); |
| |
| h->flags = (BCDC_PROTO_VER << BCDC_FLAG_VER_SHIFT); |
| if (pktbuf->ip_summed == CHECKSUM_PARTIAL) |
| h->flags |= BCDC_FLAG_SUM_NEEDED; |
| |
| h->priority = (pktbuf->priority & BCDC_PRIORITY_MASK); |
| h->flags2 = 0; |
| h->data_offset = offset; |
| BCDC_SET_IF_IDX(h, ifidx); |
| trace_brcmf_bcdchdr(pktbuf->data); |
| } |
| |
| static int |
| brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool do_fws, |
| struct sk_buff *pktbuf, struct brcmf_if **ifp) |
| { |
| struct brcmf_proto_bcdc_header *h; |
| struct brcmf_if *tmp_if; |
| |
| brcmf_dbg(BCDC, "Enter\n"); |
| |
| /* Pop BCDC header used to convey priority for buses that don't */ |
| if (pktbuf->len <= BCDC_HEADER_LEN) { |
| brcmf_dbg(INFO, "rx data too short (%d <= %d)\n", |
| pktbuf->len, BCDC_HEADER_LEN); |
| return -EBADE; |
| } |
| |
| trace_brcmf_bcdchdr(pktbuf->data); |
| h = (struct brcmf_proto_bcdc_header *)(pktbuf->data); |
| |
| tmp_if = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h)); |
| if (!tmp_if) { |
| brcmf_dbg(INFO, "no matching ifp found\n"); |
| return -EBADE; |
| } |
| if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) != |
| BCDC_PROTO_VER) { |
| brcmf_err("%s: non-BCDC packet received, flags 0x%x\n", |
| brcmf_ifname(tmp_if), h->flags); |
| return -EBADE; |
| } |
| |
| if (h->flags & BCDC_FLAG_SUM_GOOD) { |
| brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n", |
| brcmf_ifname(tmp_if), h->flags); |
| pktbuf->ip_summed = CHECKSUM_UNNECESSARY; |
| } |
| |
| pktbuf->priority = h->priority & BCDC_PRIORITY_MASK; |
| |
| skb_pull(pktbuf, BCDC_HEADER_LEN); |
| if (do_fws) |
| brcmf_fws_hdrpull(tmp_if, h->data_offset << 2, pktbuf); |
| else |
| skb_pull(pktbuf, h->data_offset << 2); |
| |
| if (pktbuf->len == 0) |
| return -ENODATA; |
| |
| if (ifp != NULL) |
| *ifp = tmp_if; |
| return 0; |
| } |
| |
| static int brcmf_proto_bcdc_tx_queue_data(struct brcmf_pub *drvr, int ifidx, |
| struct sk_buff *skb) |
| { |
| struct brcmf_if *ifp = brcmf_get_ifp(drvr, ifidx); |
| struct brcmf_bcdc *bcdc = drvr->proto->pd; |
| |
| if (!brcmf_fws_queue_skbs(bcdc->fws)) |
| return brcmf_proto_txdata(drvr, ifidx, 0, skb); |
| |
| return brcmf_fws_process_skb(ifp, skb); |
| } |
| |
| static int |
| brcmf_proto_bcdc_txdata(struct brcmf_pub *drvr, int ifidx, u8 offset, |
| struct sk_buff *pktbuf) |
| { |
| 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)) { |
| if (!success) |
| brcmf_fws_bustxfail(bcdc->fws, txp); |
| } 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) { |
| brcmf_err("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); |
| 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); |
| } |