From dfef26d9aad4f983da232b259ee7f7faec479b2d Mon Sep 17 00:00:00 2001 From: Alex Dubov Date: Thu, 12 Apr 2007 16:59:24 +1000 Subject: [PATCH] tifm_sd: merge dma and pio request processing paths To allow for switching of trasfer mode (dma/pio) on a per-request basis, pio and dma request issue and completion function are now merged. Signed-off-by: Alex Dubov Signed-off-by: Pierre Ossman --- drivers/mmc/tifm_sd.c | 198 +++++++++++++++++--------------------------------- 1 file changed, 68 insertions(+), 130 deletions(-) diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c index fe8cb1aa681..52499548abe 100644 --- a/drivers/mmc/tifm_sd.c +++ b/drivers/mmc/tifm_sd.c @@ -484,19 +484,40 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) if (r_data) { tifm_sd_set_data_timeout(host, r_data); - sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, - mrq->cmd->flags & MMC_DATA_WRITE - ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - if (sg_count != 1) { - printk(KERN_ERR DRIVER_NAME - ": scatterlist map failed\n"); - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } + if (host->no_dma) { + host->buffer_size = mrq->cmd->data->blocks + * mrq->cmd->data->blksz; + + writel(TIFM_MMCSD_BUFINT + | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) + | (TIFM_MMCSD_FIFO_SIZE - 1), + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + host->written_blocks = 0; + host->cmd_flags &= ~CARD_BUSY; + host->buffer_pos = 0; + writel(r_data->blocks - 1, + sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(r_data->blksz - 1, + sock->addr + SOCK_MMCSD_BLOCK_LEN); + } else { + sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, + mrq->cmd->flags & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE + : PCI_DMA_FROMDEVICE); + if (sg_count != 1) { + printk(KERN_ERR DRIVER_NAME + ": scatterlist map failed\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } - host->written_blocks = 0; - host->cmd_flags &= ~CARD_BUSY; - tifm_sd_prepare_data(host, mrq->cmd); + host->written_blocks = 0; + host->cmd_flags &= ~CARD_BUSY; + tifm_sd_prepare_data(host, mrq->cmd); + } } host->req = mrq; @@ -542,128 +563,47 @@ static void tifm_sd_end_cmd(unsigned long data) r_data = mrq->cmd->data; if (r_data) { - if (r_data->flags & MMC_DATA_WRITE) { - r_data->bytes_xfered = host->written_blocks - * r_data->blksz; - } else { - r_data->bytes_xfered = r_data->blocks - - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; - r_data->bytes_xfered *= r_data->blksz; - r_data->bytes_xfered += r_data->blksz - - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; - } - tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, - (r_data->flags & MMC_DATA_WRITE) - ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); - } - - writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - - spin_unlock_irqrestore(&sock->lock, flags); - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct tifm_sd *host = mmc_priv(mmc); - struct tifm_dev *sock = host->dev; - unsigned long flags; - struct mmc_data *r_data = mrq->cmd->data; - - spin_lock_irqsave(&sock->lock, flags); - if (host->eject) { - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (host->req) { - printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); - spin_unlock_irqrestore(&sock->lock, flags); - goto err_out; - } - - if (r_data) { - tifm_sd_set_data_timeout(host, r_data); - - host->buffer_size = mrq->cmd->data->blocks - * mrq->cmd->data->blksz; - - writel(TIFM_MMCSD_BUFINT - | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), - sock->addr + SOCK_MMCSD_INT_ENABLE); - writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) - | (TIFM_MMCSD_FIFO_SIZE - 1), - sock->addr + SOCK_MMCSD_BUFFER_CONFIG); - - host->written_blocks = 0; - host->cmd_flags &= ~CARD_BUSY; - host->buffer_pos = 0; - writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); - writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); - } - - host->req = mrq; - mod_timer(&host->timer, jiffies + host->timeout_jiffies); - host->state = CMD; - writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - tifm_sd_exec(host, mrq->cmd); - spin_unlock_irqrestore(&sock->lock, flags); - return; - -err_out: - mrq->cmd->error = MMC_ERR_TIMEOUT; - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_end_cmd_nodma(unsigned long data) -{ - struct tifm_sd *host = (struct tifm_sd*)data; - struct tifm_dev *sock = host->dev; - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct mmc_request *mrq; - struct mmc_data *r_data = NULL; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - del_timer(&host->timer); - mrq = host->req; - host->req = NULL; - host->state = IDLE; - - if (!mrq) { - printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); - spin_unlock_irqrestore(&sock->lock, flags); - return; - } - - r_data = mrq->cmd->data; - if (r_data) { - writel((~TIFM_MMCSD_BUFINT) & - readl(sock->addr + SOCK_MMCSD_INT_ENABLE), - sock->addr + SOCK_MMCSD_INT_ENABLE); - - if (r_data->flags & MMC_DATA_WRITE) { - r_data->bytes_xfered = host->written_blocks - * r_data->blksz; + if (host->no_dma) { + writel((~TIFM_MMCSD_BUFINT) & + readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks + * r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) + - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz + - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + + 1; + } + host->buffer_pos = 0; + host->buffer_size = 0; } else { - r_data->bytes_xfered = r_data->blocks - - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; - r_data->bytes_xfered *= r_data->blksz; - r_data->bytes_xfered += r_data->blksz - - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks + * r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz - + readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + + 1; + } + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); } - host->buffer_pos = 0; - host->buffer_size = 0; } writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), sock->addr + SOCK_CONTROL); spin_unlock_irqrestore(&sock->lock, flags); - mmc_request_done(mmc, mrq); } @@ -755,7 +695,7 @@ static int tifm_sd_ro(struct mmc_host *mmc) return rc; } -static struct mmc_host_ops tifm_sd_ops = { +static const struct mmc_host_ops tifm_sd_ops = { .request = tifm_sd_request, .set_ios = tifm_sd_ios, .get_ro = tifm_sd_ro @@ -846,12 +786,10 @@ static int tifm_sd_probe(struct tifm_dev *sock) host->dev = sock; host->timeout_jiffies = msecs_to_jiffies(1000); - tasklet_init(&host->finish_tasklet, - host->no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, + tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd, (unsigned long)host); setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host); - tifm_sd_ops.request = host->no_dma ? tifm_sd_request_nodma : tifm_sd_request; mmc->ops = &tifm_sd_ops; mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; -- 2.11.4.GIT