| /* |
| * 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. |
| */ |
| |
| #include <linux/types.h> |
| #include <linux/netdevice.h> |
| #include <linux/sched.h> |
| #include <defs.h> |
| |
| #include <brcmu_utils.h> |
| #include <brcmu_wifi.h> |
| |
| #include "dngl_stats.h" |
| #include "dhd.h" |
| #include "dhd_proto.h" |
| #include "dhd_bus.h" |
| #include "dhd_dbg.h" |
| |
| struct brcmf_proto_cdc_ioctl { |
| u32 cmd; /* ioctl command value */ |
| u32 len; /* lower 16: output buflen; |
| * upper 16: input buflen (excludes header) */ |
| u32 flags; /* flag defns given below */ |
| u32 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 CDCF_IOC_ERROR 0x01 /* 1=ioctl cmd failed */ |
| #define CDCF_IOC_SET 0x02 /* 0=get, 1=set cmd */ |
| #define CDCF_IOC_IF_MASK 0xF000 /* I/F index */ |
| #define CDCF_IOC_IF_SHIFT 12 |
| #define CDCF_IOC_ID_MASK 0xFFFF0000 /* id an ioctl pairing */ |
| #define CDCF_IOC_ID_SHIFT 16 /* ID Mask shift bits */ |
| #define CDC_IOC_ID(flags) \ |
| (((flags) & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT) |
| #define CDC_SET_IF_IDX(hdr, idx) \ |
| ((hdr)->flags = (((hdr)->flags & ~CDCF_IOC_IF_MASK) | \ |
| ((idx) << CDCF_IOC_IF_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 1 /* 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 { |
| u8 flags; |
| u8 priority; /* 802.1d Priority, 4:7 flow control info for usb */ |
| u8 flags2; |
| u8 rssi; |
| }; |
| |
| |
| #define RETRIES 2 /* # of retries to retrieve matching ioctl response */ |
| #define BUS_HEADER_LEN (16+BRCMF_SDALIGN) /* Must be atleast SDPCM_RESERVE |
| * defined in dhd_sdio.c |
| * (amount of header tha might be added) |
| * plus any space that might be needed |
| * for alignment padding. |
| */ |
| #define ROUND_UP_MARGIN 2048 /* Biggest SDIO block size possible for |
| * round off at the end of buffer |
| */ |
| |
| struct brcmf_proto { |
| u16 reqid; |
| u8 pending; |
| u32 lastcmd; |
| u8 bus_header[BUS_HEADER_LEN]; |
| struct brcmf_proto_cdc_ioctl msg; |
| unsigned char buf[BRCMF_C_IOCTL_MAXLEN + ROUND_UP_MARGIN]; |
| }; |
| |
| static int brcmf_proto_cdc_msg(struct brcmf_pub *dhd) |
| { |
| struct brcmf_proto *prot = dhd->prot; |
| int len = le32_to_cpu(prot->msg.len) + |
| sizeof(struct brcmf_proto_cdc_ioctl); |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| /* 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_sdbrcm_bus_txctl(dhd->bus, (unsigned char *)&prot->msg, |
| len); |
| } |
| |
| static int brcmf_proto_cdc_cmplt(struct brcmf_pub *dhd, u32 id, u32 len) |
| { |
| int ret; |
| struct brcmf_proto *prot = dhd->prot; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| do { |
| ret = brcmf_sdbrcm_bus_rxctl(dhd->bus, |
| (unsigned char *)&prot->msg, |
| len + sizeof(struct brcmf_proto_cdc_ioctl)); |
| if (ret < 0) |
| break; |
| } while (CDC_IOC_ID(le32_to_cpu(prot->msg.flags)) != id); |
| |
| return ret; |
| } |
| |
| int |
| brcmf_proto_cdc_query_ioctl(struct brcmf_pub *dhd, int ifidx, uint cmd, |
| void *buf, uint len) |
| { |
| struct brcmf_proto *prot = dhd->prot; |
| struct brcmf_proto_cdc_ioctl *msg = &prot->msg; |
| void *info; |
| int ret = 0, retries = 0; |
| u32 id, flags = 0; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| DHD_CTL(("%s: cmd %d len %d\n", __func__, cmd, len)); |
| |
| /* Respond "bcmerror" and "bcmerrorstr" with local cache */ |
| if (cmd == BRCMF_C_GET_VAR && buf) { |
| if (!strcmp((char *)buf, "bcmerrorstr")) { |
| strncpy((char *)buf, "bcm_error", |
| BCME_STRLEN); |
| goto done; |
| } else if (!strcmp((char *)buf, "bcmerror")) { |
| *(int *)buf = dhd->dongle_error; |
| goto done; |
| } |
| } |
| |
| memset(msg, 0, sizeof(struct brcmf_proto_cdc_ioctl)); |
| |
| msg->cmd = cpu_to_le32(cmd); |
| msg->len = cpu_to_le32(len); |
| msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT); |
| CDC_SET_IF_IDX(msg, ifidx); |
| msg->flags = cpu_to_le32(msg->flags); |
| |
| if (buf) |
| memcpy(prot->buf, buf, len); |
| |
| ret = brcmf_proto_cdc_msg(dhd); |
| if (ret < 0) { |
| DHD_ERROR(("dhdcdc_query_ioctl: dhdcdc_msg failed w/status " |
| "%d\n", ret)); |
| goto done; |
| } |
| |
| retry: |
| /* wait for interrupt and get first fragment */ |
| ret = brcmf_proto_cdc_cmplt(dhd, prot->reqid, len); |
| if (ret < 0) |
| goto done; |
| |
| flags = le32_to_cpu(msg->flags); |
| id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT; |
| |
| if ((id < prot->reqid) && (++retries < RETRIES)) |
| goto retry; |
| if (id != prot->reqid) { |
| DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n", |
| brcmf_ifname(dhd, ifidx), __func__, 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 & CDCF_IOC_ERROR) { |
| ret = le32_to_cpu(msg->status); |
| /* Cache error from dongle */ |
| dhd->dongle_error = ret; |
| } |
| |
| done: |
| return ret; |
| } |
| |
| int brcmf_proto_cdc_set_ioctl(struct brcmf_pub *dhd, int ifidx, uint cmd, |
| void *buf, uint len) |
| { |
| struct brcmf_proto *prot = dhd->prot; |
| struct brcmf_proto_cdc_ioctl *msg = &prot->msg; |
| int ret = 0; |
| u32 flags, id; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| DHD_CTL(("%s: cmd %d len %d\n", __func__, cmd, len)); |
| |
| memset(msg, 0, sizeof(struct brcmf_proto_cdc_ioctl)); |
| |
| msg->cmd = cpu_to_le32(cmd); |
| msg->len = cpu_to_le32(len); |
| msg->flags = (++prot->reqid << CDCF_IOC_ID_SHIFT) | CDCF_IOC_SET; |
| CDC_SET_IF_IDX(msg, ifidx); |
| msg->flags = cpu_to_le32(msg->flags); |
| |
| if (buf) |
| memcpy(prot->buf, buf, len); |
| |
| ret = brcmf_proto_cdc_msg(dhd); |
| if (ret < 0) |
| goto done; |
| |
| ret = brcmf_proto_cdc_cmplt(dhd, prot->reqid, len); |
| if (ret < 0) |
| goto done; |
| |
| flags = le32_to_cpu(msg->flags); |
| id = (flags & CDCF_IOC_ID_MASK) >> CDCF_IOC_ID_SHIFT; |
| |
| if (id != prot->reqid) { |
| DHD_ERROR(("%s: %s: unexpected request id %d (expected %d)\n", |
| brcmf_ifname(dhd, ifidx), __func__, id, |
| prot->reqid)); |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| /* Check the ERROR flag */ |
| if (flags & CDCF_IOC_ERROR) { |
| ret = le32_to_cpu(msg->status); |
| /* Cache error from dongle */ |
| dhd->dongle_error = ret; |
| } |
| |
| done: |
| return ret; |
| } |
| |
| int |
| brcmf_proto_ioctl(struct brcmf_pub *dhd, int ifidx, struct brcmf_ioctl *ioc, |
| void *buf, int len) |
| { |
| struct brcmf_proto *prot = dhd->prot; |
| int ret = -1; |
| |
| if (dhd->busstate == DHD_BUS_DOWN) { |
| DHD_ERROR(("%s : bus is down. we have nothing to do\n", |
| __func__)); |
| return ret; |
| } |
| brcmf_os_proto_block(dhd); |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| ASSERT(len <= BRCMF_C_IOCTL_MAXLEN); |
| |
| if (len > BRCMF_C_IOCTL_MAXLEN) |
| goto done; |
| |
| if (prot->pending == true) { |
| DHD_TRACE(("CDC packet is pending!!!! cmd=0x%x (%lu) " |
| "lastcmd=0x%x (%lu)\n", |
| ioc->cmd, (unsigned long)ioc->cmd, prot->lastcmd, |
| (unsigned long)prot->lastcmd)); |
| if ((ioc->cmd == BRCMF_C_SET_VAR) || |
| (ioc->cmd == BRCMF_C_GET_VAR)) |
| DHD_TRACE(("iovar cmd=%s\n", (char *)buf)); |
| |
| goto done; |
| } |
| |
| prot->pending = true; |
| prot->lastcmd = ioc->cmd; |
| if (ioc->set) |
| ret = brcmf_proto_cdc_set_ioctl(dhd, ifidx, ioc->cmd, buf, len); |
| else { |
| ret = brcmf_proto_cdc_query_ioctl(dhd, ifidx, ioc->cmd, |
| buf, len); |
| if (ret > 0) |
| ioc->used = ret - sizeof(struct brcmf_proto_cdc_ioctl); |
| } |
| |
| /* Too many programs assume ioctl() returns 0 on success */ |
| if (ret >= 0) |
| ret = 0; |
| else { |
| struct brcmf_proto_cdc_ioctl *msg = &prot->msg; |
| /* len == needed when set/query fails from dongle */ |
| ioc->needed = le32_to_cpu(msg->len); |
| } |
| |
| /* Intercept the wme_dp ioctl here */ |
| if (!ret && ioc->cmd == BRCMF_C_SET_VAR && |
| !strcmp(buf, "wme_dp")) { |
| int slen, val = 0; |
| |
| slen = strlen("wme_dp") + 1; |
| if (len >= (int)(slen + sizeof(int))) |
| memcpy(&val, (char *)buf + slen, sizeof(int)); |
| dhd->wme_dp = (u8) le32_to_cpu(val); |
| } |
| |
| prot->pending = false; |
| |
| done: |
| brcmf_os_proto_unblock(dhd); |
| |
| return ret; |
| } |
| |
| #define PKTSUMNEEDED(skb) \ |
| (((struct sk_buff *)(skb))->ip_summed == CHECKSUM_PARTIAL) |
| #define PKTSETSUMGOOD(skb, x) \ |
| (((struct sk_buff *)(skb))->ip_summed = \ |
| ((x) ? CHECKSUM_UNNECESSARY : CHECKSUM_NONE)) |
| |
| /* PKTSETSUMNEEDED and PKTSUMGOOD are not possible because |
| skb->ip_summed is overloaded */ |
| |
| int |
| brcmf_proto_iovar_op(struct brcmf_pub *dhdp, const char *name, |
| void *params, int plen, void *arg, int len, bool set) |
| { |
| return -ENOTSUPP; |
| } |
| |
| void brcmf_proto_dump(struct brcmf_pub *dhdp, struct brcmu_strbuf *strbuf) |
| { |
| brcmu_bprintf(strbuf, "Protocol CDC: reqid %d\n", dhdp->prot->reqid); |
| } |
| |
| void brcmf_proto_hdrpush(struct brcmf_pub *dhd, int ifidx, |
| struct sk_buff *pktbuf) |
| { |
| struct brcmf_proto_bdc_header *h; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| /* 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 (PKTSUMNEEDED(pktbuf)) |
| h->flags |= BDC_FLAG_SUM_NEEDED; |
| |
| h->priority = (pktbuf->priority & BDC_PRIORITY_MASK); |
| h->flags2 = 0; |
| h->rssi = 0; |
| BDC_SET_IF_IDX(h, ifidx); |
| } |
| |
| int brcmf_proto_hdrpull(struct brcmf_pub *dhd, int *ifidx, |
| struct sk_buff *pktbuf) |
| { |
| struct brcmf_proto_bdc_header *h; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| /* Pop BDC header used to convey priority for buses that don't */ |
| |
| if (pktbuf->len < BDC_HEADER_LEN) { |
| DHD_ERROR(("%s: rx data too short (%d < %d)\n", __func__, |
| pktbuf->len, BDC_HEADER_LEN)); |
| return -EBADE; |
| } |
| |
| h = (struct brcmf_proto_bdc_header *)(pktbuf->data); |
| |
| *ifidx = BDC_GET_IF_IDX(h); |
| if (*ifidx >= BRCMF_MAX_IFS) { |
| DHD_ERROR(("%s: rx data ifnum out of range (%d)\n", |
| __func__, *ifidx)); |
| return -EBADE; |
| } |
| |
| if (((h->flags & BDC_FLAG_VER_MASK) >> BDC_FLAG_VER_SHIFT) != |
| BDC_PROTO_VER) { |
| DHD_ERROR(("%s: non-BDC packet received, flags 0x%x\n", |
| brcmf_ifname(dhd, *ifidx), h->flags)); |
| return -EBADE; |
| } |
| |
| if (h->flags & BDC_FLAG_SUM_GOOD) { |
| DHD_INFO(("%s: BDC packet received with good rx-csum, " |
| "flags 0x%x\n", |
| brcmf_ifname(dhd, *ifidx), h->flags)); |
| PKTSETSUMGOOD(pktbuf, true); |
| } |
| |
| pktbuf->priority = h->priority & BDC_PRIORITY_MASK; |
| |
| skb_pull(pktbuf, BDC_HEADER_LEN); |
| |
| return 0; |
| } |
| |
| int brcmf_proto_attach(struct brcmf_pub *dhd) |
| { |
| struct brcmf_proto *cdc; |
| |
| cdc = kzalloc(sizeof(struct brcmf_proto), GFP_ATOMIC); |
| if (!cdc) { |
| DHD_ERROR(("%s: kmalloc failed\n", __func__)); |
| goto fail; |
| } |
| |
| /* ensure that the msg buf directly follows the cdc msg struct */ |
| if ((unsigned long)(&cdc->msg + 1) != (unsigned long)cdc->buf) { |
| DHD_ERROR(("struct brcmf_proto is not correctly defined\n")); |
| goto fail; |
| } |
| |
| dhd->prot = cdc; |
| dhd->hdrlen += BDC_HEADER_LEN; |
| dhd->maxctl = BRCMF_C_IOCTL_MAXLEN + |
| sizeof(struct brcmf_proto_cdc_ioctl) + 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 *dhd) |
| { |
| kfree(dhd->prot); |
| dhd->prot = NULL; |
| } |
| |
| void brcmf_proto_dstats(struct brcmf_pub *dhd) |
| { |
| /* No stats from dongle added yet, copy bus stats */ |
| dhd->dstats.tx_packets = dhd->tx_packets; |
| dhd->dstats.tx_errors = dhd->tx_errors; |
| dhd->dstats.rx_packets = dhd->rx_packets; |
| dhd->dstats.rx_errors = dhd->rx_errors; |
| dhd->dstats.rx_dropped = dhd->rx_dropped; |
| dhd->dstats.multicast = dhd->rx_multicast; |
| return; |
| } |
| |
| int brcmf_proto_init(struct brcmf_pub *dhd) |
| { |
| int ret = 0; |
| char buf[128]; |
| |
| DHD_TRACE(("%s: Enter\n", __func__)); |
| |
| brcmf_os_proto_block(dhd); |
| |
| /* Get the device MAC address */ |
| strcpy(buf, "cur_etheraddr"); |
| ret = brcmf_proto_cdc_query_ioctl(dhd, 0, BRCMF_C_GET_VAR, |
| buf, sizeof(buf)); |
| if (ret < 0) { |
| brcmf_os_proto_unblock(dhd); |
| return ret; |
| } |
| memcpy(dhd->mac, buf, ETH_ALEN); |
| |
| brcmf_os_proto_unblock(dhd); |
| |
| ret = brcmf_c_preinit_ioctls(dhd); |
| |
| /* Always assumes wl for now */ |
| dhd->iswl = true; |
| |
| return ret; |
| } |
| |
| void brcmf_proto_stop(struct brcmf_pub *dhd) |
| { |
| /* Nothing to do for CDC */ |
| } |