Because CQHCI has its own DMA descriptors, when using DMA,
if the DMA addr or buffer size has limitaion, we need to add an
option to set up tran_desc.
Signed-off-by: Jyan Chou <jyanchou@xxxxxxxxxxx>
---
drivers/mmc/host/cqhci-core.c | 5 +++++
drivers/mmc/host/cqhci.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
index b3d7d6d8d654..4d6fb228a21e 100644
--- a/drivers/mmc/host/cqhci-core.c
+++ b/drivers/mmc/host/cqhci-core.c
@@ -516,6 +516,11 @@ static int cqhci_prep_tran_desc(struct mmc_request *mrq,
desc = get_trans_desc(cq_host, tag);
+ if (cq_host->ops->setup_tran_desc) {
+ cq_host->ops->setup_tran_desc(data, cq_host, desc, sg_count);
+ return 0;
+ }
+
for_each_sg(data->sg, sg, sg_count, i) {
addr = sg_dma_address(sg);
len = sg_dma_len(sg);
diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
index ba9387ed90eb..2e47461096e8 100644
--- a/drivers/mmc/host/cqhci.h
+++ b/drivers/mmc/host/cqhci.h
@@ -290,6 +290,8 @@ struct cqhci_host_ops {
int (*program_key)(struct cqhci_host *cq_host,
const union cqhci_crypto_cfg_entry *cfg, int slot);
#endif
+ void (*setup_tran_desc)(struct mmc_data *data,
+ struct cqhci_host *cq_host, u8 *desc, int sg_count);
};
static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg)
--
2.38.1
