+ off = sg[host->sg_pos].offset + host->block_pos;
+
+ pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
+ p_off = offset_in_page(off);
+ p_cnt = PAGE_SIZE - p_off;
+ p_cnt = min(p_cnt, cnt);
+ p_cnt = min(p_cnt, t_size);
+
+ if (r_data->flags & MMC_DATA_READ)
+ tifm_sd_read_fifo(host, pg, p_off, p_cnt);
+ else if (r_data->flags & MMC_DATA_WRITE)
+ tifm_sd_write_fifo(host, pg, p_off, p_cnt);
+
+ t_size -= p_cnt;
+ host->block_pos += p_cnt;
+ }
+}
+
+static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off,
+ struct page *src, unsigned int src_off,
+ unsigned int count)
+{
+ unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off;
+ unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off;
+
+ memcpy(dst_buf, src_buf, count);
+
+ kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ);
+ kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ);
+}
+
+static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data)
+{
+ struct scatterlist *sg = r_data->sg;
+ unsigned int t_size = r_data->blksz;
+ unsigned int off, cnt;
+ unsigned int p_off, p_cnt;
+ struct page *pg;
+
+ dev_dbg(&host->dev->dev, "bouncing block\n");
+ while (t_size) {
+ cnt = sg[host->sg_pos].length - host->block_pos;
+ if (!cnt) {
+ host->block_pos = 0;
+ host->sg_pos++;
+ if (host->sg_pos == host->sg_len)
+ return;
+ cnt = sg[host->sg_pos].length;
+ }
+ off = sg[host->sg_pos].offset + host->block_pos;
+
+ pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
+ p_off = offset_in_page(off);
+ p_cnt = PAGE_SIZE - p_off;
+ p_cnt = min(p_cnt, cnt);
+ p_cnt = min(p_cnt, t_size);
+
+ if (r_data->flags & MMC_DATA_WRITE)
+ tifm_sd_copy_page(host->bounce_buf.page,
+ r_data->blksz - t_size,
+ pg, p_off, p_cnt);
+ else if (r_data->flags & MMC_DATA_READ)
+ tifm_sd_copy_page(pg, p_off, host->bounce_buf.page,
+ r_data->blksz - t_size, p_cnt);
+
+ t_size -= p_cnt;
+ host->block_pos += p_cnt;
+ }
+}
+
+int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data)
+{
+ struct tifm_dev *sock = host->dev;
+ unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz;
+ unsigned int dma_len, dma_blk_cnt, dma_off;
+ struct scatterlist *sg = NULL;
+ unsigned long flags;
+
+ if (host->sg_pos == host->sg_len)
+ return 1;
+
+ if (host->cmd_flags & DATA_CARRY) {
+ host->cmd_flags &= ~DATA_CARRY;
+ local_irq_save(flags);
+ tifm_sd_bounce_block(host, r_data);
+ local_irq_restore(flags);
+ if (host->sg_pos == host->sg_len)
+ return 1;
+ }
+
+ dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos;
+ if (!dma_len) {
+ host->block_pos = 0;
+ host->sg_pos++;
+ if (host->sg_pos == host->sg_len)
+ return 1;
+ dma_len = sg_dma_len(&r_data->sg[host->sg_pos]);
+ }
+
+ if (dma_len < t_size) {
+ dma_blk_cnt = dma_len / r_data->blksz;
+ dma_off = host->block_pos;
+ host->block_pos += dma_blk_cnt * r_data->blksz;
+ } else {
+ dma_blk_cnt = TIFM_DMA_TSIZE;
+ dma_off = host->block_pos;
+ host->block_pos += t_size;