diff options
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c | 78 | ||||
| -rw-r--r-- | include/linux/platform_data/brcmfmac-sdio.h | 5 |
2 files changed, 72 insertions, 11 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c index 70cd0e9cd52b..e3f3c48f86d4 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh.c @@ -331,10 +331,11 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, bool write, u32 addr, struct sk_buff_head *pktlist) { unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset; - unsigned int max_blks, max_req_sz; + unsigned int max_blks, max_req_sz, orig_offset, dst_offset; unsigned short max_seg_sz, seg_sz; - unsigned char *pkt_data; - struct sk_buff *pkt_next = NULL; + unsigned char *pkt_data, *orig_data, *dst_data; + struct sk_buff *pkt_next = NULL, *local_pkt_next; + struct sk_buff_head local_list, *target_list; struct mmc_request mmc_req; struct mmc_command mmc_cmd; struct mmc_data mmc_dat; @@ -371,6 +372,32 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, req_sz); } + target_list = pktlist; + /* for host with broken sg support, prepare a page aligned list */ + __skb_queue_head_init(&local_list); + if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) { + req_sz = 0; + skb_queue_walk(pktlist, pkt_next) + req_sz += pkt_next->len; + req_sz = ALIGN(req_sz, sdiodev->func[fn]->cur_blksize); + while (req_sz > PAGE_SIZE) { + pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE); + if (pkt_next == NULL) { + ret = -ENOMEM; + goto exit; + } + __skb_queue_tail(&local_list, pkt_next); + req_sz -= PAGE_SIZE; + } + pkt_next = brcmu_pkt_buf_get_skb(req_sz); + if (pkt_next == NULL) { + ret = -ENOMEM; + goto exit; + } + __skb_queue_tail(&local_list, pkt_next); + target_list = &local_list; + } + host = sdiodev->func[fn]->card->host; func_blk_sz = sdiodev->func[fn]->cur_blksize; /* Blocks per command is limited by host count, host transfer @@ -380,13 +407,15 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, max_req_sz = min_t(unsigned int, host->max_req_size, max_blks * func_blk_sz); max_seg_sz = min_t(unsigned short, host->max_segs, SG_MAX_SINGLE_ALLOC); - max_seg_sz = min_t(unsigned short, max_seg_sz, pktlist->qlen); - seg_sz = pktlist->qlen; + max_seg_sz = min_t(unsigned short, max_seg_sz, target_list->qlen); + seg_sz = target_list->qlen; pkt_offset = 0; - pkt_next = pktlist->next; + pkt_next = target_list->next; - if (sg_alloc_table(&st, max_seg_sz, GFP_KERNEL)) - return -ENOMEM; + if (sg_alloc_table(&st, max_seg_sz, GFP_KERNEL)) { + ret = -ENOMEM; + goto exit; + } while (seg_sz) { req_sz = 0; @@ -396,7 +425,7 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, memset(&mmc_dat, 0, sizeof(struct mmc_data)); sgl = st.sgl; /* prep sg table */ - while (pkt_next != (struct sk_buff *)pktlist) { + while (pkt_next != (struct sk_buff *)target_list) { pkt_data = pkt_next->data + pkt_offset; sg_data_sz = pkt_next->len - pkt_offset; if (sg_data_sz > host->max_seg_size) @@ -423,8 +452,8 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, if (req_sz % func_blk_sz != 0) { brcmf_err("sg request length %u is not %u aligned\n", req_sz, func_blk_sz); - sg_free_table(&st); - return -ENOTBLK; + ret = -ENOTBLK; + goto exit; } mmc_dat.sg = st.sgl; mmc_dat.sg_len = sg_cnt; @@ -457,7 +486,34 @@ static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn, } } + if (sdiodev->pdata && sdiodev->pdata->broken_sg_support && !write) { + local_pkt_next = local_list.next; + orig_offset = 0; + skb_queue_walk(pktlist, pkt_next) { + dst_offset = 0; + do { + req_sz = local_pkt_next->len - orig_offset; + req_sz = min_t(uint, pkt_next->len - dst_offset, + req_sz); + orig_data = local_pkt_next->data + orig_offset; + dst_data = pkt_next->data + dst_offset; + memcpy(dst_data, orig_data, req_sz); + orig_offset += req_sz; + dst_offset += req_sz; + if (orig_offset == local_pkt_next->len) { + orig_offset = 0; + local_pkt_next = local_pkt_next->next; + } + if (dst_offset == pkt_next->len) + break; + } while (!skb_queue_empty(&local_list)); + } + } + +exit: sg_free_table(&st); + while ((pkt_next = __skb_dequeue(&local_list)) != NULL) + brcmu_pkt_buf_free_skb(pkt_next); return ret; } diff --git a/include/linux/platform_data/brcmfmac-sdio.h b/include/linux/platform_data/brcmfmac-sdio.h index 1ade657d5fc1..b7174998c24a 100644 --- a/include/linux/platform_data/brcmfmac-sdio.h +++ b/include/linux/platform_data/brcmfmac-sdio.h @@ -90,6 +90,10 @@ void __init brcmfmac_init_pdata(void) * oob_irq_nr, oob_irq_flags: the OOB interrupt information. The values are * used for registering the irq using request_irq function. * + * broken_sg_support: flag for broken sg list support of SDIO host controller. + * Set this to true if the SDIO host controller has higher align requirement + * than 32 bytes for each scatterlist item. + * * power_on: This function is called by the brcmfmac when the module gets * loaded. This can be particularly useful for low power devices. The platform * spcific routine may for example decide to power up the complete device. @@ -116,6 +120,7 @@ struct brcmfmac_sdio_platform_data { bool oob_irq_supported; unsigned int oob_irq_nr; unsigned long oob_irq_flags; + bool broken_sg_support; void (*power_on)(void); void (*power_off)(void); void (*reset)(void); |