| Message ID | 20231127124529.78203-5-manivannan.sadhasivam@linaro.org (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Delegated to: | Krzysztof Wilczyński |
| Headers | show |
| Series | bus: mhi: ep: Add async read/write support | expand |
Hello, > Even though iATU only supports synchronous read/write, the MHI stack may > call async read/write callbacks without knowing the limitations of the > controller driver. So in order to maintain compatibility, let's simulate > async read/write operation with iATU by invoking the completion callback > after memcpy. > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > --- > drivers/pci/endpoint/functions/pci-epf-mhi.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c > index 34e7191f9508..7214f4da733b 100644 > --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c > +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c > @@ -234,6 +234,9 @@ static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl, > > mutex_unlock(&epf_mhi->lock); > > + if (buf_info->cb) > + buf_info->cb(buf_info); > + > return 0; > } > > @@ -262,6 +265,9 @@ static int pci_epf_mhi_iatu_write(struct mhi_ep_cntrl *mhi_cntrl, > > mutex_unlock(&epf_mhi->lock); > > + if (buf_info->cb) > + buf_info->cb(buf_info); > + > return 0; > } Looks good! Reviewed-by: Krzysztof Wilczyński <kw@linux.com> Krzysztof
diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c index 34e7191f9508..7214f4da733b 100644 --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c @@ -234,6 +234,9 @@ static int pci_epf_mhi_iatu_read(struct mhi_ep_cntrl *mhi_cntrl, mutex_unlock(&epf_mhi->lock); + if (buf_info->cb) + buf_info->cb(buf_info); + return 0; } @@ -262,6 +265,9 @@ static int pci_epf_mhi_iatu_write(struct mhi_ep_cntrl *mhi_cntrl, mutex_unlock(&epf_mhi->lock); + if (buf_info->cb) + buf_info->cb(buf_info); + return 0; }
Even though iATU only supports synchronous read/write, the MHI stack may call async read/write callbacks without knowing the limitations of the controller driver. So in order to maintain compatibility, let's simulate async read/write operation with iATU by invoking the completion callback after memcpy. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- drivers/pci/endpoint/functions/pci-epf-mhi.c | 6 ++++++ 1 file changed, 6 insertions(+)