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brcmfmac: add sdio sg list support
Add scatter gather list support for better rx glom performance. Reviewed-by: Hante Meuleman <meuleman@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Reviewed-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Franky Lin <frankyl@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Franky Lin
John W. Linville
parent
78b3f1c5be
commit
354b75bfdb
@ -22,9 +22,11 @@
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#include <linux/pci_ids.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <linux/scatterlist.h>
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#include <linux/mmc/sdio.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include <linux/platform_data/brcmfmac-sdio.h>
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#include <defs.h>
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@ -316,34 +318,138 @@ void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
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* caller has already been padded and aligned.
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*/
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static int brcmf_sdio_buffrw(struct brcmf_sdio_dev *sdiodev, uint fn,
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bool write, u32 addr, struct sk_buff *pkt)
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bool write, u32 addr, struct sk_buff_head *pktlist)
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{
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uint len;
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unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset;
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unsigned int max_blks, max_req_sz;
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unsigned short max_seg_sz, seg_sz;
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unsigned char *pkt_data;
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struct sk_buff *pkt_next = NULL;
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struct mmc_request mmc_req;
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struct mmc_command mmc_cmd;
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struct mmc_data mmc_dat;
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struct sg_table st;
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struct scatterlist *sgl;
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struct mmc_host *host;
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int ret = 0;
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if (!pktlist->qlen)
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return -EINVAL;
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brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait);
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if (brcmf_pm_resume_error(sdiodev))
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return -EIO;
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/* Single skb use the standard mmc interface */
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if (!pkt->next) {
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len = pkt->len + 3;
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len &= (uint)~3;
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if (pktlist->qlen == 1) {
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pkt_next = pktlist->next;
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req_sz = pkt_next->len + 3;
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req_sz &= (uint)~3;
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if (write)
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return sdio_memcpy_toio(sdiodev->func[fn], addr,
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((u8 *)(pkt->data)), len);
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((u8 *)(pkt_next->data)),
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req_sz);
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else if (fn == 1)
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return sdio_memcpy_fromio(sdiodev->func[fn],
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((u8 *)(pkt->data)), addr,
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len);
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((u8 *)(pkt_next->data)),
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addr, req_sz);
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else
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/* function 2 read is FIFO operation */
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return sdio_readsb(sdiodev->func[fn],
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((u8 *)(pkt->data)), addr, len);
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((u8 *)(pkt_next->data)), addr,
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req_sz);
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}
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brcmf_err("skb chain is not supported yet.\n");
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return -EOPNOTSUPP;
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host = sdiodev->func[fn]->card->host;
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func_blk_sz = sdiodev->func[fn]->cur_blksize;
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/* Blocks per command is limited by host count, host transfer
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* size and the maximum for IO_RW_EXTENDED of 511 blocks.
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*/
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max_blks = min_t(unsigned int, host->max_blk_count, 511u);
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max_req_sz = min_t(unsigned int, host->max_req_size,
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max_blks * func_blk_sz);
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max_seg_sz = min_t(unsigned short, host->max_segs, SG_MAX_SINGLE_ALLOC);
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max_seg_sz = min_t(unsigned short, max_seg_sz, pktlist->qlen);
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seg_sz = pktlist->qlen;
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pkt_offset = 0;
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pkt_next = pktlist->next;
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if (sg_alloc_table(&st, max_seg_sz, GFP_KERNEL))
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return -ENOMEM;
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while (seg_sz) {
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req_sz = 0;
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sg_cnt = 0;
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memset(&mmc_req, 0, sizeof(struct mmc_request));
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memset(&mmc_cmd, 0, sizeof(struct mmc_command));
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memset(&mmc_dat, 0, sizeof(struct mmc_data));
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sgl = st.sgl;
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/* prep sg table */
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while (pkt_next != (struct sk_buff *)pktlist) {
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pkt_data = pkt_next->data + pkt_offset;
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sg_data_sz = pkt_next->len - pkt_offset;
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if (sg_data_sz > host->max_seg_size)
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sg_data_sz = host->max_seg_size;
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if (sg_data_sz > max_req_sz - req_sz)
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sg_data_sz = max_req_sz - req_sz;
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sg_set_buf(sgl, pkt_data, sg_data_sz);
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sg_cnt++;
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sgl = sg_next(sgl);
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req_sz += sg_data_sz;
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pkt_offset += sg_data_sz;
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if (pkt_offset == pkt_next->len) {
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pkt_offset = 0;
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pkt_next = pkt_next->next;
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}
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if (req_sz >= max_req_sz || sg_cnt >= max_seg_sz)
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break;
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}
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seg_sz -= sg_cnt;
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if (req_sz % func_blk_sz != 0) {
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brcmf_err("sg request length %u is not %u aligned\n",
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req_sz, func_blk_sz);
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sg_free_table(&st);
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return -ENOTBLK;
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}
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mmc_dat.sg = st.sgl;
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mmc_dat.sg_len = sg_cnt;
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mmc_dat.blksz = func_blk_sz;
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mmc_dat.blocks = req_sz / func_blk_sz;
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mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
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mmc_cmd.opcode = SD_IO_RW_EXTENDED;
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mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */
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mmc_cmd.arg |= (fn & 0x7) << 28; /* SDIO func num */
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mmc_cmd.arg |= 1<<27; /* block mode */
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/* incrementing addr for function 1 */
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mmc_cmd.arg |= (fn == 1) ? 1<<26 : 0;
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mmc_cmd.arg |= (addr & 0x1FFFF) << 9; /* address */
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mmc_cmd.arg |= mmc_dat.blocks & 0x1FF; /* block count */
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mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
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mmc_req.cmd = &mmc_cmd;
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mmc_req.data = &mmc_dat;
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if (fn == 1)
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addr += req_sz;
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mmc_set_data_timeout(&mmc_dat, sdiodev->func[fn]->card);
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mmc_wait_for_req(host, &mmc_req);
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ret = mmc_cmd.error ? mmc_cmd.error : mmc_dat.error;
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if (ret != 0) {
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brcmf_err("CMD53 sg block %s failed %d\n",
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write ? "write" : "read", ret);
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ret = -EIO;
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break;
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}
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}
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sg_free_table(&st);
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return ret;
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}
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static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
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@ -400,6 +506,7 @@ brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
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{
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uint width;
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int err = 0;
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struct sk_buff_head pkt_list;
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brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
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fn, addr, pkt->len);
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@ -409,7 +516,10 @@ brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
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if (err)
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goto done;
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err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, pkt);
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skb_queue_head_init(&pkt_list);
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skb_queue_tail(&pkt_list, pkt);
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err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, &pkt_list);
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skb_dequeue_tail(&pkt_list);
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done:
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return err;
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@ -431,8 +541,7 @@ int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
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goto done;
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incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
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err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
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pktq);
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err = brcmf_sdio_buffrw(sdiodev, fn, false, addr, pktq);
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done:
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return err;
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@ -467,6 +576,7 @@ brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
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uint width;
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uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
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int err = 0;
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struct sk_buff_head pkt_list;
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brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
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fn, addr, pkt->len);
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@ -489,7 +599,10 @@ brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
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if (width == 4)
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addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
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err = brcmf_sdio_buffrw(sdiodev, fn, true, addr, pkt);
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skb_queue_head_init(&pkt_list);
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skb_queue_tail(&pkt_list, pkt);
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err = brcmf_sdio_buffrw(sdiodev, fn, true, addr, &pkt_list);
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skb_dequeue_tail(&pkt_list);
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done:
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return err;
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@ -503,6 +616,7 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
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struct sk_buff *pkt;
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u32 sdaddr;
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uint dsize;
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struct sk_buff_head pkt_list;
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dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
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pkt = dev_alloc_skb(dsize);
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@ -511,6 +625,7 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
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return -EIO;
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}
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pkt->priority = 0;
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skb_queue_head_init(&pkt_list);
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/* Determine initial transfer parameters */
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sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
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@ -538,8 +653,10 @@ brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
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skb_put(pkt, dsize);
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if (write)
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memcpy(pkt->data, data, dsize);
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skb_queue_tail(&pkt_list, pkt);
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bcmerror = brcmf_sdio_buffrw(sdiodev, SDIO_FUNC_1, write,
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sdaddr, pkt);
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sdaddr, &pkt_list);
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skb_dequeue_tail(&pkt_list);
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if (bcmerror) {
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brcmf_err("membytes transfer failed\n");
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break;
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@ -211,78 +211,6 @@ int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
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return err_ret;
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}
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/* precondition: host controller is claimed */
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static int
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brcmf_sdioh_request_data(struct brcmf_sdio_dev *sdiodev, uint write, bool fifo,
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uint func, uint addr, struct sk_buff *pkt, uint pktlen)
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{
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int err_ret = 0;
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if ((write) && (!fifo)) {
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err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
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((u8 *) (pkt->data)), pktlen);
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} else if (write) {
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err_ret = sdio_memcpy_toio(sdiodev->func[func], addr,
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((u8 *) (pkt->data)), pktlen);
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} else if (fifo) {
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err_ret = sdio_readsb(sdiodev->func[func],
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((u8 *) (pkt->data)), addr, pktlen);
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} else {
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err_ret = sdio_memcpy_fromio(sdiodev->func[func],
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((u8 *) (pkt->data)),
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addr, pktlen);
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}
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return err_ret;
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}
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/*
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* This function takes a queue of packets. The packets on the queue
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* are assumed to be properly aligned by the caller.
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*/
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int
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brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
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uint write, uint func, uint addr,
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struct sk_buff_head *pktq)
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{
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bool fifo = (fix_inc == SDIOH_DATA_FIX);
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u32 SGCount = 0;
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int err_ret = 0;
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struct sk_buff *pkt;
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brcmf_dbg(SDIO, "Enter\n");
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brcmf_pm_resume_wait(sdiodev, &sdiodev->request_chain_wait);
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if (brcmf_pm_resume_error(sdiodev))
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return -EIO;
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skb_queue_walk(pktq, pkt) {
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uint pkt_len = pkt->len;
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pkt_len += 3;
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pkt_len &= 0xFFFFFFFC;
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err_ret = brcmf_sdioh_request_data(sdiodev, write, fifo, func,
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addr, pkt, pkt_len);
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if (err_ret) {
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brcmf_err("%s FAILED %p[%d], addr=0x%05x, pkt_len=%d, ERR=0x%08x\n",
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write ? "TX" : "RX", pkt, SGCount, addr,
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pkt_len, err_ret);
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} else {
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brcmf_dbg(SDIO, "%s xfr'd %p[%d], addr=0x%05x, len=%d\n",
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write ? "TX" : "RX", pkt, SGCount, addr,
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pkt_len);
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}
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if (!fifo)
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addr += pkt_len;
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SGCount++;
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}
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brcmf_dbg(SDIO, "Exit\n");
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return err_ret;
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}
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static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
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{
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/* read 24 bits and return valid 17 bit addr */
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@ -431,7 +359,6 @@ static int brcmf_ops_sdio_probe(struct sdio_func *func,
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atomic_set(&sdiodev->suspend, false);
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init_waitqueue_head(&sdiodev->request_byte_wait);
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init_waitqueue_head(&sdiodev->request_word_wait);
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init_waitqueue_head(&sdiodev->request_chain_wait);
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init_waitqueue_head(&sdiodev->request_buffer_wait);
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brcmf_dbg(SDIO, "F2 found, calling brcmf_sdio_probe...\n");
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@ -448,8 +448,6 @@ struct brcmf_sdio {
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uint rxblen; /* Allocated length of rxbuf */
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u8 *rxctl; /* Aligned pointer into rxbuf */
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u8 *rxctl_orig; /* pointer for freeing rxctl */
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u8 *databuf; /* Buffer for receiving big glom packet */
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u8 *dataptr; /* Aligned pointer into databuf */
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uint rxlen; /* Length of valid data in buffer */
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spinlock_t rxctl_lock; /* protection lock for ctrl frame resources */
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@ -473,8 +471,6 @@ struct brcmf_sdio {
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s32 idletime; /* Control for activity timeout */
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s32 idlecount; /* Activity timeout counter */
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s32 idleclock; /* How to set bus driver when idle */
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s32 sd_rxchain;
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bool use_rxchain; /* If brcmf should use PKT chains */
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bool rxflow_mode; /* Rx flow control mode */
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bool rxflow; /* Is rx flow control on */
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bool alp_only; /* Don't use HT clock (ALP only) */
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@ -1025,29 +1021,6 @@ static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
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bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
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}
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/* copy a buffer into a pkt buffer chain */
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static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
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{
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uint n, ret = 0;
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struct sk_buff *p;
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u8 *buf;
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buf = bus->dataptr;
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/* copy the data */
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skb_queue_walk(&bus->glom, p) {
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n = min_t(uint, p->len, len);
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memcpy(p->data, buf, n);
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buf += n;
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len -= n;
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ret += n;
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if (!len)
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break;
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}
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return ret;
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}
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/* return total length of buffer chain */
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static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
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{
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@ -1201,8 +1174,6 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
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int errcode;
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u8 doff, sfdoff;
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bool usechain = bus->use_rxchain;
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struct brcmf_sdio_read rd_new;
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/* If packets, issue read(s) and send up packet chain */
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@ -1237,7 +1208,6 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
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if (sublen % BRCMF_SDALIGN) {
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brcmf_err("sublen %d not multiple of %d\n",
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sublen, BRCMF_SDALIGN);
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usechain = false;
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}
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totlen += sublen;
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@ -1304,27 +1274,9 @@ static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
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* packet and and copy into the chain.
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*/
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sdio_claim_host(bus->sdiodev->func[1]);
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if (usechain) {
|
||||
errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
|
||||
bus->sdiodev->sbwad,
|
||||
SDIO_FUNC_2, F2SYNC, &bus->glom);
|
||||
} else if (bus->dataptr) {
|
||||
errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
|
||||
bus->sdiodev->sbwad,
|
||||
SDIO_FUNC_2, F2SYNC,
|
||||
bus->dataptr, dlen);
|
||||
sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
|
||||
if (sublen != dlen) {
|
||||
brcmf_err("FAILED TO COPY, dlen %d sublen %d\n",
|
||||
dlen, sublen);
|
||||
errcode = -1;
|
||||
}
|
||||
pnext = NULL;
|
||||
} else {
|
||||
brcmf_err("COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
|
||||
dlen);
|
||||
errcode = -1;
|
||||
}
|
||||
sdio_release_host(bus->sdiodev->func[1]);
|
||||
bus->sdcnt.f2rxdata++;
|
||||
|
||||
@ -3527,9 +3479,6 @@ static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
|
||||
kfree(bus->rxbuf);
|
||||
bus->rxctl = bus->rxbuf = NULL;
|
||||
bus->rxlen = 0;
|
||||
|
||||
kfree(bus->databuf);
|
||||
bus->databuf = NULL;
|
||||
}
|
||||
|
||||
static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
|
||||
@ -3542,29 +3491,10 @@ static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
|
||||
ALIGNMENT) + BRCMF_SDALIGN;
|
||||
bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
|
||||
if (!(bus->rxbuf))
|
||||
goto fail;
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Allocate buffer to receive glomed packet */
|
||||
bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
|
||||
if (!(bus->databuf)) {
|
||||
/* release rxbuf which was already located as above */
|
||||
if (!bus->rxblen)
|
||||
kfree(bus->rxbuf);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/* Align the buffer */
|
||||
if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
|
||||
bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
|
||||
((unsigned long)bus->databuf % BRCMF_SDALIGN));
|
||||
else
|
||||
bus->dataptr = bus->databuf;
|
||||
|
||||
return true;
|
||||
|
||||
fail:
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool
|
||||
@ -3703,10 +3633,6 @@ static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
|
||||
bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
|
||||
bus->roundup = min(max_roundup, bus->blocksize);
|
||||
|
||||
/* bus module does not support packet chaining */
|
||||
bus->use_rxchain = false;
|
||||
bus->sd_rxchain = false;
|
||||
|
||||
/* SR state */
|
||||
bus->sleeping = false;
|
||||
bus->sr_enabled = false;
|
||||
|
||||
@ -170,7 +170,6 @@ struct brcmf_sdio_dev {
|
||||
atomic_t suspend; /* suspend flag */
|
||||
wait_queue_head_t request_byte_wait;
|
||||
wait_queue_head_t request_word_wait;
|
||||
wait_queue_head_t request_chain_wait;
|
||||
wait_queue_head_t request_buffer_wait;
|
||||
struct device *dev;
|
||||
struct brcmf_bus *bus_if;
|
||||
@ -272,12 +271,6 @@ brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
|
||||
uint rw, uint fnc, uint addr,
|
||||
u32 *word, uint nbyte);
|
||||
|
||||
/* read or write any buffer using cmd53 */
|
||||
extern int
|
||||
brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc,
|
||||
uint write, uint func, uint addr,
|
||||
struct sk_buff_head *pktq);
|
||||
|
||||
/* Watchdog timer interface for pm ops */
|
||||
extern void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev,
|
||||
bool enable);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user