| Message ID | 20200820103522.26242-2-rojay@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | Implement Shutdown callback for i2c | expand |
Hi Roja, On 8/20/2020 4:05 PM, Roja Rani Yarubandi wrote: > 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. > > Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org> > --- > Changes in V2: > - As per Stephen's comments, changed commit text, fixed minor nitpicks. > > drivers/i2c/busses/i2c-qcom-geni.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c > index 7f130829bf01..1fda5c7c2cfc 100644 > --- a/drivers/i2c/busses/i2c-qcom-geni.c > +++ b/drivers/i2c/busses/i2c-qcom-geni.c > @@ -86,6 +86,9 @@ struct geni_i2c_dev { > u32 clk_freq_out; > const struct geni_i2c_clk_fld *clk_fld; > int suspended; > + dma_addr_t tx_dma; > + dma_addr_t rx_dma; > + size_t xfer_len; > }; > > struct geni_i2c_err_log { > @@ -358,6 +361,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > struct geni_se *se = &gi2c->se; > size_t len = msg->len; > > + gi2c->xfer_len = msg->len; nit: gi2c->xfer = len, for tx_one_msg as well. Regards, Akash > if (!of_machine_is_compatible("lenovo,yoga-c630")) > dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > @@ -384,6 +388,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > if (dma_buf) { > if (gi2c->err) > geni_i2c_rx_fsm_rst(gi2c); > + gi2c->rx_dma = rx_dma; > geni_se_rx_dma_unprep(se, rx_dma, len); > i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); > } > @@ -400,6 +405,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > struct geni_se *se = &gi2c->se; > size_t len = msg->len; > > + gi2c->xfer_len = msg->len; > if (!of_machine_is_compatible("lenovo,yoga-c630")) > dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); > > @@ -429,6 +435,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, > if (dma_buf) { > if (gi2c->err) > geni_i2c_tx_fsm_rst(gi2c); > + gi2c->tx_dma = tx_dma; > geni_se_tx_dma_unprep(se, tx_dma, len); > i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); > }
On 2020-08-26 17:25, Akash Asthana wrote: > Hi Roja, > > On 8/20/2020 4:05 PM, Roja Rani Yarubandi wrote: >> 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. >> >> Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org> >> --- >> Changes in V2: >> - As per Stephen's comments, changed commit text, fixed minor >> nitpicks. >> >> drivers/i2c/busses/i2c-qcom-geni.c | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c >> b/drivers/i2c/busses/i2c-qcom-geni.c >> index 7f130829bf01..1fda5c7c2cfc 100644 >> --- a/drivers/i2c/busses/i2c-qcom-geni.c >> +++ b/drivers/i2c/busses/i2c-qcom-geni.c >> @@ -86,6 +86,9 @@ struct geni_i2c_dev { >> u32 clk_freq_out; >> const struct geni_i2c_clk_fld *clk_fld; >> int suspended; >> + dma_addr_t tx_dma; >> + dma_addr_t rx_dma; >> + size_t xfer_len; >> }; >> struct geni_i2c_err_log { >> @@ -358,6 +361,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev >> *gi2c, struct i2c_msg *msg, >> struct geni_se *se = &gi2c->se; >> size_t len = msg->len; >> + gi2c->xfer_len = msg->len; > > nit: gi2c->xfer = len, for tx_one_msg as well. > > Regards, > > Akash > Okay >> if (!of_machine_is_compatible("lenovo,yoga-c630")) >> dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); >> @@ -384,6 +388,7 @@ static int geni_i2c_rx_one_msg(struct >> geni_i2c_dev *gi2c, struct i2c_msg *msg, >> if (dma_buf) { >> if (gi2c->err) >> geni_i2c_rx_fsm_rst(gi2c); >> + gi2c->rx_dma = rx_dma; >> geni_se_rx_dma_unprep(se, rx_dma, len); >> i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); >> } >> @@ -400,6 +405,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev >> *gi2c, struct i2c_msg *msg, >> struct geni_se *se = &gi2c->se; >> size_t len = msg->len; >> + gi2c->xfer_len = msg->len; >> if (!of_machine_is_compatible("lenovo,yoga-c630")) >> dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); >> @@ -429,6 +435,7 @@ static int geni_i2c_tx_one_msg(struct >> geni_i2c_dev *gi2c, struct i2c_msg *msg, >> if (dma_buf) { >> if (gi2c->err) >> geni_i2c_tx_fsm_rst(gi2c); >> + gi2c->tx_dma = tx_dma; >> geni_se_tx_dma_unprep(se, tx_dma, len); >> i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); >> }
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 7f130829bf01..1fda5c7c2cfc 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -86,6 +86,9 @@ struct geni_i2c_dev { u32 clk_freq_out; const struct geni_i2c_clk_fld *clk_fld; int suspended; + dma_addr_t tx_dma; + dma_addr_t rx_dma; + size_t xfer_len; }; struct geni_i2c_err_log { @@ -358,6 +361,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, struct geni_se *se = &gi2c->se; size_t len = msg->len; + gi2c->xfer_len = msg->len; if (!of_machine_is_compatible("lenovo,yoga-c630")) dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); @@ -384,6 +388,7 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, if (dma_buf) { if (gi2c->err) geni_i2c_rx_fsm_rst(gi2c); + gi2c->rx_dma = rx_dma; geni_se_rx_dma_unprep(se, rx_dma, len); i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); } @@ -400,6 +405,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, struct geni_se *se = &gi2c->se; size_t len = msg->len; + gi2c->xfer_len = msg->len; if (!of_machine_is_compatible("lenovo,yoga-c630")) dma_buf = i2c_get_dma_safe_msg_buf(msg, 32); @@ -429,6 +435,7 @@ static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, if (dma_buf) { if (gi2c->err) geni_i2c_tx_fsm_rst(gi2c); + gi2c->tx_dma = tx_dma; geni_se_tx_dma_unprep(se, tx_dma, len); i2c_put_dma_safe_msg_buf(dma_buf, msg, !gi2c->err); }
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. Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org> --- Changes in V2: - As per Stephen's comments, changed commit text, fixed minor nitpicks. drivers/i2c/busses/i2c-qcom-geni.c | 7 +++++++ 1 file changed, 7 insertions(+)