From: Roja Rani Yarubandi rojay@codeaurora.org
[ Upstream commit 357ee8841d0b7bd822f25fc768afbc0c2ab7e47b ]
Store DMA mapping data in geni_i2c_dev struct to enhance DMA mapping data scope. For example during shutdown callback to unmap DMA mapping, this stored DMA mapping data can be used to call geni_se_tx_dma_unprep and geni_se_rx_dma_unprep functions.
Add two helper functions geni_i2c_rx_msg_cleanup and geni_i2c_tx_msg_cleanup to unwrap the things after rx/tx FIFO/DMA transfers, so that the same can be used in geni_i2c_stop_xfer() function during shutdown callback.
Signed-off-by: Roja Rani Yarubandi rojay@codeaurora.org Reviewed-by: Akash Asthana akashast@codeaurora.org Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-qcom-geni.c | 59 ++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 16 deletions(-)
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 17abf60c94aeb..b56a427fb928f 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -87,6 +87,9 @@ struct geni_i2c_dev { u32 clk_freq_out; const struct geni_i2c_clk_fld *clk_fld; int suspended; + void *dma_buf; + size_t xfer_len; + dma_addr_t dma_addr; };
struct geni_i2c_err_log { @@ -350,14 +353,39 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c) dev_err(gi2c->se.dev, "Timeout resetting TX_FSM\n"); }
+static void geni_i2c_rx_msg_cleanup(struct geni_i2c_dev *gi2c, + struct i2c_msg *cur) +{ + gi2c->cur_rd = 0; + if (gi2c->dma_buf) { + if (gi2c->err) + geni_i2c_rx_fsm_rst(gi2c); + geni_se_rx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len); + i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err); + } +} + +static void geni_i2c_tx_msg_cleanup(struct geni_i2c_dev *gi2c, + struct i2c_msg *cur) +{ + gi2c->cur_wr = 0; + if (gi2c->dma_buf) { + if (gi2c->err) + geni_i2c_tx_fsm_rst(gi2c); + geni_se_tx_dma_unprep(&gi2c->se, gi2c->dma_addr, gi2c->xfer_len); + i2c_put_dma_safe_msg_buf(gi2c->dma_buf, cur, !gi2c->err); + } +} + static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, u32 m_param) { - dma_addr_t rx_dma; + dma_addr_t rx_dma = 0; unsigned long time_left; void *dma_buf = NULL; struct geni_se *se = &gi2c->se; size_t len = msg->len; + struct i2c_msg *cur;
if (!of_machine_is_compatible("lenovo,yoga-c630")) dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); @@ -374,19 +402,18 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, geni_se_select_mode(se, GENI_SE_FIFO); i2c_put_dma_safe_msg_buf(dma_buf, msg, false); dma_buf = NULL; + } else { + gi2c->xfer_len = len; + gi2c->dma_addr = rx_dma; + gi2c->dma_buf = dma_buf; }
+ cur = gi2c->cur; time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT); if (!time_left) geni_i2c_abort_xfer(gi2c);
- gi2c->cur_rd = 0; - if (dma_buf) { - if (gi2c->err) - geni_i2c_rx_fsm_rst(gi2c); - geni_se_rx_dma_unprep(se, rx_dma, len); - i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); - } + geni_i2c_rx_msg_cleanup(gi2c, cur);
return gi2c->err; } @@ -394,11 +421,12 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, u32 m_param) { - dma_addr_t tx_dma; + dma_addr_t tx_dma = 0; unsigned long time_left; void *dma_buf = NULL; struct geni_se *se = &gi2c->se; size_t len = msg->len; + struct i2c_msg *cur;
if (!of_machine_is_compatible("lenovo,yoga-c630")) dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); @@ -415,22 +443,21 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, geni_se_select_mode(se, GENI_SE_FIFO); i2c_put_dma_safe_msg_buf(dma_buf, msg, false); dma_buf = NULL; + } else { + gi2c->xfer_len = len; + gi2c->dma_addr = tx_dma; + gi2c->dma_buf = dma_buf; }
if (!dma_buf) /* Get FIFO IRQ */ writel_relaxed(1, se->base + SE_GENI_TX_WATERMARK_REG);
+ cur = gi2c->cur; time_left = wait_for_completion_timeout(&gi2c->done, XFER_TIMEOUT); if (!time_left) geni_i2c_abort_xfer(gi2c);
- gi2c->cur_wr = 0; - if (dma_buf) { - if (gi2c->err) - geni_i2c_tx_fsm_rst(gi2c); - geni_se_tx_dma_unprep(se, tx_dma, len); - i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); - } + geni_i2c_tx_msg_cleanup(gi2c, cur);
return gi2c->err; }