Re: [PATCH 2/2] mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req"

Ulf Hansson
2014-04-29T07:36:03Z

On 29 April 2014 03:54, <micky_ching@realsil.com.cn> wrote:
> From: Micky Ching <micky_ching@realsil.com.cn>
>
> This reverts commit c42deffd5b53c9e583d83c7964854ede2f12410d.
>
> commit <mmc: rtsx: add support for pre_req and post_req> did use
> mutex_unlock() in tasklet, but mutex_unlock() can't used in
> tasklet(atomic context). The driver need use mutex to avoid concurrency,
> so we can't use tasklet here, the patch need to be removed.
>
> The spinlock host->lock and pcr->lock may deadlock, one way to solve the
> deadlock is remove host->lock in sd_isr_done_transfer(), but if using
> workqueue the we can avoid using the spinlock and also avoid the problem.
>
> Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>

Acked-by: Ulf Hansson <ulf.hansson@linaro.org>

> ---
> drivers/mfd/rtsx_pcr.c | 132 ++++--------
> drivers/mmc/host/rtsx_pci_sdmmc.c | 418 ++++++-------------------------------
> include/linux/mfd/rtsx_common.h | 1 -
> include/linux/mfd/rtsx_pci.h | 6 -
> 4 files changed, 109 insertions(+), 448 deletions(-)
>
> diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
> index c9de3d5..1d15735 100644
> --- a/drivers/mfd/rtsx_pcr.c
> +++ b/drivers/mfd/rtsx_pcr.c
> @@ -338,28 +338,58 @@ int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> int num_sg, bool read, int timeout)
> {
> struct completion trans_done;
> - int err = 0, count;
> + u8 dir;
> + int err = 0, i, count;
> long timeleft;
> unsigned long flags;
> + struct scatterlist *sg;
> + enum dma_data_direction dma_dir;
> + u32 val;
> + dma_addr_t addr;
> + unsigned int len;
> +
> + dev_dbg(&(pcr->pci->dev), "--> %s: num_sg = %d\n", __func__, num_sg);
> +
> + /* don't transfer data during abort processing */
> + if (pcr->remove_pci)
> + return -EINVAL;
> +
> + if ((sglist == NULL) || (num_sg <= 0))
> + return -EINVAL;
>
> - count = rtsx_pci_dma_map_sg(pcr, sglist, num_sg, read);
> + if (read) {
> + dir = DEVICE_TO_HOST;
> + dma_dir = DMA_FROM_DEVICE;
> + } else {
> + dir = HOST_TO_DEVICE;
> + dma_dir = DMA_TO_DEVICE;
> + }
> +
> + count = dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
> if (count < 1) {
> dev_err(&(pcr->pci->dev), "scatterlist map failed\n");
> return -EINVAL;
> }
> dev_dbg(&(pcr->pci->dev), "DMA mapping count: %d\n", count);
>
> + val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
> + pcr->sgi = 0;
> + for_each_sg(sglist, sg, count, i) {
> + addr = sg_dma_address(sg);
> + len = sg_dma_len(sg);
> + rtsx_pci_add_sg_tbl(pcr, addr, len, i == count - 1);
> + }
>
> spin_lock_irqsave(&pcr->lock, flags);
>
> pcr->done = &trans_done;
> pcr->trans_result = TRANS_NOT_READY;
> init_completion(&trans_done);
> + rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
> + rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
>
> spin_unlock_irqrestore(&pcr->lock, flags);
>
> - rtsx_pci_dma_transfer(pcr, sglist, count, read);
> -
> timeleft = wait_for_completion_interruptible_timeout(
> &trans_done, msecs_to_jiffies(timeout));
> if (timeleft <= 0) {
> @@ -383,7 +413,7 @@ out:
> pcr->done = NULL;
> spin_unlock_irqrestore(&pcr->lock, flags);
>
> - rtsx_pci_dma_unmap_sg(pcr, sglist, num_sg, read);
> + dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dma_dir);
>
> if ((err < 0) && (err != -ENODEV))
> rtsx_pci_stop_cmd(pcr);
> @@ -395,73 +425,6 @@ out:
> }
> EXPORT_SYMBOL_GPL(rtsx_pci_transfer_data);
>
> -int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int num_sg, bool read)
> -{
> - enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
> -
> - if (pcr->remove_pci)
> - return -EINVAL;
> -
> - if ((sglist == NULL) || num_sg < 1)
> - return -EINVAL;
> -
> - return dma_map_sg(&(pcr->pci->dev), sglist, num_sg, dir);
> -}
> -EXPORT_SYMBOL_GPL(rtsx_pci_dma_map_sg);
> -
> -int rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int num_sg, bool read)
> -{
> - enum dma_data_direction dir = read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
> -
> - if (pcr->remove_pci)
> - return -EINVAL;
> -
> - if (sglist == NULL || num_sg < 1)
> - return -EINVAL;
> -
> - dma_unmap_sg(&(pcr->pci->dev), sglist, num_sg, dir);
> - return num_sg;
> -}
> -EXPORT_SYMBOL_GPL(rtsx_pci_dma_unmap_sg);
> -
> -int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int sg_count, bool read)
> -{
> - struct scatterlist *sg;
> - dma_addr_t addr;
> - unsigned int len;
> - int i;
> - u32 val;
> - u8 dir = read ? DEVICE_TO_HOST : HOST_TO_DEVICE;
> - unsigned long flags;
> -
> - if (pcr->remove_pci)
> - return -EINVAL;
> -
> - if ((sglist == NULL) || (sg_count < 1))
> - return -EINVAL;
> -
> - val = ((u32)(dir & 0x01) << 29) | TRIG_DMA | ADMA_MODE;
> - pcr->sgi = 0;
> - for_each_sg(sglist, sg, sg_count, i) {
> - addr = sg_dma_address(sg);
> - len = sg_dma_len(sg);
> - rtsx_pci_add_sg_tbl(pcr, addr, len, i == sg_count - 1);
> - }
> -
> - spin_lock_irqsave(&pcr->lock, flags);
> -
> - rtsx_pci_writel(pcr, RTSX_HDBAR, pcr->host_sg_tbl_addr);
> - rtsx_pci_writel(pcr, RTSX_HDBCTLR, val);
> -
> - spin_unlock_irqrestore(&pcr->lock, flags);
> -
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(rtsx_pci_dma_transfer);
> -
> int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len)
> {
> int err;
> @@ -873,8 +836,6 @@ static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
> int_reg = rtsx_pci_readl(pcr, RTSX_BIPR);
> /* Clear interrupt flag */
> rtsx_pci_writel(pcr, RTSX_BIPR, int_reg);
> - dev_dbg(&pcr->pci->dev, "=========== BIPR 0x%8x ==========\n", int_reg);
> -
> if ((int_reg & pcr->bier) == 0) {
> spin_unlock(&pcr->lock);
> return IRQ_NONE;
> @@ -905,28 +866,17 @@ static irqreturn_t rtsx_pci_isr(int irq, void *dev_id)
> }
>
> if (int_reg & (NEED_COMPLETE_INT | DELINK_INT)) {
> - if (int_reg & (TRANS_FAIL_INT | DELINK_INT))
> + if (int_reg & (TRANS_FAIL_INT | DELINK_INT)) {
> pcr->trans_result = TRANS_RESULT_FAIL;
> - else if (int_reg & TRANS_OK_INT)
> + if (pcr->done)
> + complete(pcr->done);
> + } else if (int_reg & TRANS_OK_INT) {
> pcr->trans_result = TRANS_RESULT_OK;
> -
> - if (pcr->done)
> - complete(pcr->done);
> -
> - if (int_reg & SD_EXIST) {
> - struct rtsx_slot *slot = &pcr->slots[RTSX_SD_CARD];
> - if (slot && slot->done_transfer)
> - slot->done_transfer(slot->p_dev);
> - }
> -
> - if (int_reg & MS_EXIST) {
> - struct rtsx_slot *slot = &pcr->slots[RTSX_SD_CARD];
> - if (slot && slot->done_transfer)
> - slot->done_transfer(slot->p_dev);
> + if (pcr->done)
> + complete(pcr->done);
> }
> }
>
> -
> if (pcr->card_inserted || pcr->card_removed)
> schedule_delayed_work(&pcr->carddet_work,
> msecs_to_jiffies(200));
> diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
> index 76cfdcc..0d51964 100644
> --- a/drivers/mmc/host/rtsx_pci_sdmmc.c
> +++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
> @@ -31,28 +31,14 @@
> #include <linux/mfd/rtsx_pci.h>
> #include <asm/unaligned.h>
>
> -struct realtek_next {
> - unsigned int sg_count;
> - s32 cookie;
> -};
> -
> struct realtek_pci_sdmmc {
> struct platform_device *pdev;
> struct rtsx_pcr *pcr;
> struct mmc_host *mmc;
> struct mmc_request *mrq;
> - struct mmc_command *cmd;
> - struct mmc_data *data;
> -
> - spinlock_t lock;
> - struct timer_list timer;
> - struct tasklet_struct cmd_tasklet;
> - struct tasklet_struct data_tasklet;
> - struct tasklet_struct finish_tasklet;
> -
> - u8 rsp_type;
> - u8 rsp_len;
> - int sg_count;
> +
> + struct mutex host_mutex;
> +
> u8 ssc_depth;
> unsigned int clock;
> bool vpclk;
> @@ -62,13 +48,8 @@ struct realtek_pci_sdmmc {
> int power_state;
> #define SDMMC_POWER_ON 1
> #define SDMMC_POWER_OFF 0
> -
> - struct realtek_next next_data;
> };
>
> -static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
> - struct mmc_request *mrq);
> -
> static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
> {
> return &(host->pdev->dev);
> @@ -105,95 +86,6 @@ static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
> #define sd_print_debug_regs(host)
> #endif /* DEBUG */
>
> -static void sd_isr_done_transfer(struct platform_device *pdev)
> -{
> - struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
> -
> - spin_lock(&host->lock);
> - if (host->cmd)
> - tasklet_schedule(&host->cmd_tasklet);
> - if (host->data)
> - tasklet_schedule(&host->data_tasklet);
> - spin_unlock(&host->lock);
> -}
> -
> -static void sd_request_timeout(unsigned long host_addr)
> -{
> - struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
> - unsigned long flags;
> -
> - spin_lock_irqsave(&host->lock, flags);
> -
> - if (!host->mrq) {
> - dev_err(sdmmc_dev(host), "error: no request exist\n");
> - goto out;
> - }
> -
> - if (host->cmd)
> - host->cmd->error = -ETIMEDOUT;
> - if (host->data)
> - host->data->error = -ETIMEDOUT;
> -
> - dev_dbg(sdmmc_dev(host), "timeout for request\n");
> -
> -out:
> - tasklet_schedule(&host->finish_tasklet);
> - spin_unlock_irqrestore(&host->lock, flags);
> -}
> -
> -static void sd_finish_request(unsigned long host_addr)
> -{
> - struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
> - struct rtsx_pcr *pcr = host->pcr;
> - struct mmc_request *mrq;
> - struct mmc_command *cmd;
> - struct mmc_data *data;
> - unsigned long flags;
> - bool any_error;
> -
> - spin_lock_irqsave(&host->lock, flags);
> -
> - del_timer(&host->timer);
> - mrq = host->mrq;
> - if (!mrq) {
> - dev_err(sdmmc_dev(host), "error: no request need finish\n");
> - goto out;
> - }
> -
> - cmd = mrq->cmd;
> - data = mrq->data;
> -
> - any_error = (mrq->sbc && mrq->sbc->error) ||
> - (mrq->stop && mrq->stop->error) ||
> - (cmd && cmd->error) || (data && data->error);
> -
> - if (any_error) {
> - rtsx_pci_stop_cmd(pcr);
> - sd_clear_error(host);
> - }
> -
> - if (data) {
> - if (any_error)
> - data->bytes_xfered = 0;
> - else
> - data->bytes_xfered = data->blocks * data->blksz;
> -
> - if (!data->host_cookie)
> - rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len,
> - data->flags & MMC_DATA_READ);
> -
> - }
> -
> - host->mrq = NULL;
> - host->cmd = NULL;
> - host->data = NULL;
> -
> -out:
> - spin_unlock_irqrestore(&host->lock, flags);
> - mutex_unlock(&pcr->pcr_mutex);
> - mmc_request_done(host->mmc, mrq);
> -}
> -
> static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
> u8 *buf, int buf_len, int timeout)
> {
> @@ -311,7 +203,8 @@ static int sd_write_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
> return 0;
> }
>
> -static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
> +static void sd_send_cmd_get_rsp(struct realtek_pci_sdmmc *host,
> + struct mmc_command *cmd)
> {
> struct rtsx_pcr *pcr = host->pcr;
> u8 cmd_idx = (u8)cmd->opcode;
> @@ -319,14 +212,11 @@ static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
> int err = 0;
> int timeout = 100;
> int i;
> + u8 *ptr;
> + int stat_idx = 0;
> u8 rsp_type;
> int rsp_len = 5;
> - unsigned long flags;
> -
> - if (host->cmd)
> - dev_err(sdmmc_dev(host), "error: cmd already exist\n");
> -
> - host->cmd = cmd;
> + bool clock_toggled = false;
>
> dev_dbg(sdmmc_dev(host), "%s: SD/MMC CMD %d, arg = 0x%08x\n",
> __func__, cmd_idx, arg);
> @@ -364,8 +254,6 @@ static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
> err = -EINVAL;
> goto out;
> }
> - host->rsp_type = rsp_type;
> - host->rsp_len = rsp_len;
>
> if (rsp_type == SD_RSP_TYPE_R1b)
> timeout = 3000;
> @@ -375,6 +263,8 @@ static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
> 0xFF, SD_CLK_TOGGLE_EN);
> if (err < 0)
> goto out;
> +
> + clock_toggled = true;
> }
>
> rtsx_pci_init_cmd(pcr);
> @@ -398,60 +288,25 @@ static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
> /* Read data from ping-pong buffer */
> for (i = PPBUF_BASE2; i < PPBUF_BASE2 + 16; i++)
> rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
> + stat_idx = 16;
> } else if (rsp_type != SD_RSP_TYPE_R0) {
> /* Read data from SD_CMDx registers */
> for (i = SD_CMD0; i <= SD_CMD4; i++)
> rtsx_pci_add_cmd(pcr, READ_REG_CMD, (u16)i, 0, 0);
> + stat_idx = 5;
> }
>
> rtsx_pci_add_cmd(pcr, READ_REG_CMD, SD_STAT1, 0, 0);
>
> - mod_timer(&host->timer, jiffies + msecs_to_jiffies(timeout));
> -
> - spin_lock_irqsave(&pcr->lock, flags);
> - pcr->trans_result = TRANS_NOT_READY;
> - rtsx_pci_send_cmd_no_wait(pcr);
> - spin_unlock_irqrestore(&pcr->lock, flags);
> -
> - return;
> -
> -out:
> - cmd->error = err;
> - tasklet_schedule(&host->finish_tasklet);
> -}
> -
> -static void sd_get_rsp(unsigned long host_addr)
> -{
> - struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
> - struct rtsx_pcr *pcr = host->pcr;
> - struct mmc_command *cmd;
> - int i, err = 0, stat_idx;
> - u8 *ptr, rsp_type;
> - unsigned long flags;
> -
> - spin_lock_irqsave(&host->lock, flags);
> -
> - cmd = host->cmd;
> - host->cmd = NULL;
> -
> - if (!cmd) {
> - dev_err(sdmmc_dev(host), "error: cmd not exist\n");
> + err = rtsx_pci_send_cmd(pcr, timeout);
> + if (err < 0) {
> + sd_print_debug_regs(host);
> + sd_clear_error(host);
> + dev_dbg(sdmmc_dev(host),
> + "rtsx_pci_send_cmd error (err = %d)\n", err);
> goto out;
> }
>
> - spin_lock(&pcr->lock);
> - if (pcr->trans_result == TRANS_NO_DEVICE)
> - err = -ENODEV;
> - else if (pcr->trans_result != TRANS_RESULT_OK)
> - err = -EINVAL;
> - spin_unlock(&pcr->lock);
> -
> - if (err < 0)
> - goto out;
> -
> - rsp_type = host->rsp_type;
> - stat_idx = host->rsp_len;
> -
> if (rsp_type == SD_RSP_TYPE_R0) {
> err = 0;
> goto out;
> @@ -488,106 +343,26 @@ static void sd_get_rsp(unsigned long host_addr)
> cmd->resp[0]);
> }
>
> - if (cmd == host->mrq->sbc) {
> - sd_send_cmd(host, host->mrq->cmd);
> - spin_unlock_irqrestore(&host->lock, flags);
> - return;
> - }
> -
> - if (cmd == host->mrq->stop)
> - goto out;
> -
> - if (cmd->data) {
> - sd_start_multi_rw(host, host->mrq);
> - spin_unlock_irqrestore(&host->lock, flags);
> - return;
> - }
> -
> out:
> cmd->error = err;
>
> - tasklet_schedule(&host->finish_tasklet);
> - spin_unlock_irqrestore(&host->lock, flags);
> -}
> -
> -static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
> - struct mmc_data *data, struct realtek_next *next)
> -{
> - struct rtsx_pcr *pcr = host->pcr;
> - int read = data->flags & MMC_DATA_READ;
> - int sg_count = 0;
> -
> - if (!next && data->host_cookie &&
> - data->host_cookie != host->next_data.cookie) {
> - dev_err(sdmmc_dev(host),
> - "error: invalid cookie data[%d] host[%d]\n",
> - data->host_cookie, host->next_data.cookie);
> - data->host_cookie = 0;
> - }
> -
> - if (next || (!next && data->host_cookie != host->next_data.cookie))
> - sg_count = rtsx_pci_dma_map_sg(pcr,
> - data->sg, data->sg_len, read);
> - else
> - sg_count = host->next_data.sg_count;
> -
> - if (next) {
> - next->sg_count = sg_count;
> - if (++next->cookie < 0)
> - next->cookie = 1;
> - data->host_cookie = next->cookie;
> - }
> -
> - return sg_count;
> -}
> -
> -static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
> - bool is_first_req)
> -{
> - struct realtek_pci_sdmmc *host = mmc_priv(mmc);
> - struct mmc_data *data = mrq->data;
> -
> - if (data->host_cookie) {
> - dev_err(sdmmc_dev(host),
> - "error: descard already cookie data[%d]\n",
> - data->host_cookie);
> - data->host_cookie = 0;
> - }
> -
> - dev_dbg(sdmmc_dev(host), "dma sg prepared: %d\n",
> - sd_pre_dma_transfer(host, data, &host->next_data));
> -}
> -
> -static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
> - int err)
> -{
> - struct realtek_pci_sdmmc *host = mmc_priv(mmc);
> - struct rtsx_pcr *pcr = host->pcr;
> - struct mmc_data *data = mrq->data;
> - int read = data->flags & MMC_DATA_READ;
> -
> - rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
> - data->host_cookie = 0;
> + if (err && clock_toggled)
> + rtsx_pci_write_register(pcr, SD_BUS_STAT,
> + SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
> }
>
> -static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
> - struct mmc_request *mrq)
> +static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
> {
> struct rtsx_pcr *pcr = host->pcr;
> struct mmc_host *mmc = host->mmc;
> struct mmc_card *card = mmc->card;
> struct mmc_data *data = mrq->data;
> int uhs = mmc_card_uhs(card);
> - int read = data->flags & MMC_DATA_READ;
> + int read = (data->flags & MMC_DATA_READ) ? 1 : 0;
> u8 cfg2, trans_mode;
> int err;
> size_t data_len = data->blksz * data->blocks;
>
> - if (host->data)
> - dev_err(sdmmc_dev(host), "error: data already exist\n");
> -
> - host->data = data;
> -
> if (read) {
> cfg2 = SD_CALCULATE_CRC7 | SD_CHECK_CRC16 |
> SD_NO_WAIT_BUSY_END | SD_CHECK_CRC7 | SD_RSP_LEN_0;
> @@ -638,54 +413,15 @@ static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
> rtsx_pci_add_cmd(pcr, CHECK_REG_CMD, SD_TRANSFER,
> SD_TRANSFER_END, SD_TRANSFER_END);
>
> - mod_timer(&host->timer, jiffies + 10 * HZ);
> rtsx_pci_send_cmd_no_wait(pcr);
>
> - err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read);
> - if (err < 0) {
> - data->error = err;
> - tasklet_schedule(&host->finish_tasklet);
> - }
> - return 0;
> -}
> -
> -static void sd_finish_multi_rw(unsigned long host_addr)
> -{
> - struct realtek_pci_sdmmc *host = (struct realtek_pci_sdmmc *)host_addr;
> - struct rtsx_pcr *pcr = host->pcr;
> - struct mmc_data *data;
> - int err = 0;
> - unsigned long flags;
> -
> - spin_lock_irqsave(&host->lock, flags);
> -
> - if (!host->data) {
> - dev_err(sdmmc_dev(host), "error: no data exist\n");
> - goto out;
> - }
> -
> - data = host->data;
> - host->data = NULL;
> -
> - if (pcr->trans_result == TRANS_NO_DEVICE)
> - err = -ENODEV;
> - else if (pcr->trans_result != TRANS_RESULT_OK)
> - err = -EINVAL;
> -
> + err = rtsx_pci_transfer_data(pcr, data->sg, data->sg_len, read, 10000);
> if (err < 0) {
> - data->error = err;
> - goto out;
> - }
> -
> - if (!host->mrq->sbc && data->stop) {
> - sd_send_cmd(host, data->stop);
> - spin_unlock_irqrestore(&host->lock, flags);
> - return;
> + sd_clear_error(host);
> + return err;
> }
>
> -out:
> - tasklet_schedule(&host->finish_tasklet);
> - spin_unlock_irqrestore(&host->lock, flags);
> + return 0;
> }
>
> static inline void sd_enable_initial_mode(struct realtek_pci_sdmmc *host)
> @@ -904,13 +640,6 @@ static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
> return 0;
> }
>
> -static inline bool sd_use_muti_rw(struct mmc_command *cmd)
> -{
> - return mmc_op_multi(cmd->opcode) ||
> - (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
> - (cmd->opcode == MMC_WRITE_BLOCK);
> -}
> -
> static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
> {
> struct realtek_pci_sdmmc *host = mmc_priv(mmc);
> @@ -919,14 +648,6 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
> struct mmc_data *data = mrq->data;
> unsigned int data_size = 0;
> int err;
> - unsigned long flags;
> -
> - mutex_lock(&pcr->pcr_mutex);
> - spin_lock_irqsave(&host->lock, flags);
> -
> - if (host->mrq)
> - dev_err(sdmmc_dev(host), "error: request already exist\n");
> - host->mrq = mrq;
>
> if (host->eject) {
> cmd->error = -ENOMEDIUM;
> @@ -939,6 +660,8 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
> goto finish;
> }
>
> + mutex_lock(&pcr->pcr_mutex);
> +
> rtsx_pci_start_run(pcr);
>
> rtsx_pci_switch_clock(pcr, host->clock, host->ssc_depth,
> @@ -947,28 +670,46 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
> rtsx_pci_write_register(pcr, CARD_SHARE_MODE,
> CARD_SHARE_MASK, CARD_SHARE_48_SD);
>
> + mutex_lock(&host->host_mutex);
> + host->mrq = mrq;
> + mutex_unlock(&host->host_mutex);
> +
> if (mrq->data)
> data_size = data->blocks * data->blksz;
>
> - if (sd_use_muti_rw(cmd))
> - host->sg_count = sd_pre_dma_transfer(host, data, NULL);
> + if (!data_size || mmc_op_multi(cmd->opcode) ||
> + (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
> + (cmd->opcode == MMC_WRITE_BLOCK)) {
> + sd_send_cmd_get_rsp(host, cmd);
>
> - if (!data_size || sd_use_muti_rw(cmd)) {
> - if (mrq->sbc)
> - sd_send_cmd(host, mrq->sbc);
> - else
> - sd_send_cmd(host, cmd);
> - spin_unlock_irqrestore(&host->lock, flags);
> + if (!cmd->error && data_size) {
> + sd_rw_multi(host, mrq);
> +
> + if (mmc_op_multi(cmd->opcode) && mrq->stop)
> + sd_send_cmd_get_rsp(host, mrq->stop);
> + }
> } else {
> - spin_unlock_irqrestore(&host->lock, flags);
> sd_normal_rw(host, mrq);
> - tasklet_schedule(&host->finish_tasklet);
> }
> - return;
> +
> + if (mrq->data) {
> + if (cmd->error || data->error)
> + data->bytes_xfered = 0;
> + else
> + data->bytes_xfered = data->blocks * data->blksz;
> + }
> +
> + mutex_unlock(&pcr->pcr_mutex);
>
> finish:
> - tasklet_schedule(&host->finish_tasklet);
> - spin_unlock_irqrestore(&host->lock, flags);
> + if (cmd->error)
> + dev_dbg(sdmmc_dev(host), "cmd->error = %d\n", cmd->error);
> +
> + mutex_lock(&host->host_mutex);
> + host->mrq = NULL;
> + mutex_unlock(&host->host_mutex);
> +
> + mmc_request_done(mmc, mrq);
> }
>
> static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
> @@ -1405,8 +1146,6 @@ out:
> }
>
> static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
> - .pre_req = sdmmc_pre_req,
> - .post_req = sdmmc_post_req,
> .request = sdmmc_request,
> .set_ios = sdmmc_set_ios,
> .get_ro = sdmmc_get_ro,
> @@ -1470,7 +1209,6 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
> struct realtek_pci_sdmmc *host;
> struct rtsx_pcr *pcr;
> struct pcr_handle *handle = pdev->dev.platform_data;
> - unsigned long host_addr;
>
> if (!handle)
> return -ENXIO;
> @@ -1494,15 +1232,8 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
> pcr->slots[RTSX_SD_CARD].p_dev = pdev;
> pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
>
> - host_addr = (unsigned long)host;
> - host->next_data.cookie = 1;
> - setup_timer(&host->timer, sd_request_timeout, host_addr);
> - tasklet_init(&host->cmd_tasklet, sd_get_rsp, host_addr);
> - tasklet_init(&host->data_tasklet, sd_finish_multi_rw, host_addr);
> - tasklet_init(&host->finish_tasklet, sd_finish_request, host_addr);
> - spin_lock_init(&host->lock);
> + mutex_init(&host->host_mutex);
>
> - pcr->slots[RTSX_SD_CARD].done_transfer = sd_isr_done_transfer;
> realtek_init_host(host);
>
> mmc_add_host(mmc);
> @@ -1515,8 +1246,6 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
> struct realtek_pci_sdmmc *host = platform_get_drvdata(pdev);
> struct rtsx_pcr *pcr;
> struct mmc_host *mmc;
> - struct mmc_request *mrq;
> - unsigned long flags;
>
> if (!host)
> return 0;
> @@ -1524,33 +1253,22 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
> pcr = host->pcr;
> pcr->slots[RTSX_SD_CARD].p_dev = NULL;
> pcr->slots[RTSX_SD_CARD].card_event = NULL;
> - pcr->slots[RTSX_SD_CARD].done_transfer = NULL;
> mmc = host->mmc;
> - mrq = host->mrq;
>
> - spin_lock_irqsave(&host->lock, flags);
> + mutex_lock(&host->host_mutex);
> if (host->mrq) {
> dev_dbg(&(pdev->dev),
> "%s: Controller removed during transfer\n",
> mmc_hostname(mmc));
>
> - if (mrq->sbc)
> - mrq->sbc->error = -ENOMEDIUM;
> - if (mrq->cmd)
> - mrq->cmd->error = -ENOMEDIUM;
> - if (mrq->stop)
> - mrq->stop->error = -ENOMEDIUM;
> - if (mrq->data)
> - mrq->data->error = -ENOMEDIUM;
> + rtsx_pci_complete_unfinished_transfer(pcr);
>
> - tasklet_schedule(&host->finish_tasklet);
> + host->mrq->cmd->error = -ENOMEDIUM;
> + if (host->mrq->stop)
> + host->mrq->stop->error = -ENOMEDIUM;
> + mmc_request_done(mmc, host->mrq);
> }
> - spin_unlock_irqrestore(&host->lock, flags);
> -
> - del_timer_sync(&host->timer);
> - tasklet_kill(&host->cmd_tasklet);
> - tasklet_kill(&host->data_tasklet);
> - tasklet_kill(&host->finish_tasklet);
> + mutex_unlock(&host->host_mutex);
>
> mmc_remove_host(mmc);
> host->eject = true;
> diff --git a/include/linux/mfd/rtsx_common.h b/include/linux/mfd/rtsx_common.h
> index 7c36cc5..443176e 100644
> --- a/include/linux/mfd/rtsx_common.h
> +++ b/include/linux/mfd/rtsx_common.h
> @@ -45,7 +45,6 @@ struct platform_device;
> struct rtsx_slot {
> struct platform_device *p_dev;
> void (*card_event)(struct platform_device *p_dev);
> - void (*done_transfer)(struct platform_device *p_dev);
> };
>
> #endif
> diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h
> index 8d6bbd6..a383597 100644
> --- a/include/linux/mfd/rtsx_pci.h
> +++ b/include/linux/mfd/rtsx_pci.h
> @@ -943,12 +943,6 @@ void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr);
> int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout);
> int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> int num_sg, bool read, int timeout);
> -int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int num_sg, bool read);
> -int rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int num_sg, bool read);
> -int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist,
> - int sg_count, bool read);
> int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len);
> int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len);
> int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card);
> --
> 1.7.9.5
>