search for: dma_device

...uct dma_chan *st_fdma_of_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct st_fdma_dev *fdev = ofdma->of_dma_data; + struct dma_chan *chan; + struct st_fdma_chan *fchan; + int ret; + + if (dma_spec->args_count < 1) + return ERR_PTR(-EINVAL); + + if (fdev->dma_device.dev->of_node != dma_spec->np) + return ERR_PTR(-EINVAL); + + ret = rproc_boot(fdev->slim_rproc->rproc); + if (ret == -ENOENT) + return ERR_PTR(-EPROBE_DEFER); + else if (ret) + return ERR_PTR(ret); + + chan = dma_get_any_slave_channel(&fdev->dma_device); + if (!chan) + goto e...

...fdev->fw_name); > + if (!fdev->slim_rproc) { > + ret = PTR_ERR(fdev->slim_rproc); > + dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n", ret); > + goto err; > + } > + > + /* Initialise list of FDMA channels */ > + INIT_LIST_HEAD(&fdev->dma_device.channels); > + for (i = 0; i < fdev->nr_channels; i++) { > + struct st_fdma_chan *fchan = &fdev->chans[i]; > + > + fchan->fdev = fdev; > + fchan->vchan.desc_free = st_fdma_free_desc; > + vchan_init(&fchan->vchan, &fdev->dma_device); this initi...

...fdev->fw_name); > + if (!fdev->slim_rproc) { > + ret = PTR_ERR(fdev->slim_rproc); > + dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n", ret); > + goto err; > + } > + > + /* Initialise list of FDMA channels */ > + INIT_LIST_HEAD(&fdev->dma_device.channels); > + for (i = 0; i < fdev->nr_channels; i++) { > + struct st_fdma_chan *fchan = &fdev->chans[i]; > + > + fchan->fdev = fdev; > + fchan->vchan.desc_free = st_fdma_free_desc; > + vchan_init(&fchan->vchan, &fdev->dma_device); this initi...

Hi Vinod, Bjorn, Patrice, This patchset adds support for the Flexible Direct Memory Access (FDMA) core found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU with a dedicated firmware. It is a general purpose DMA controller supporting 16 independent channels and data can be moved from memory to memory or between memory and paced latency critical real time targets. After quite

Hi Vinod, Bjorn, Patrice, This patchset adds support for the Flexible Direct Memory Access (FDMA) core found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU with a dedicated firmware. It is a general purpose DMA controller supporting 16 independent channels and data can be moved from memory to memory or between memory and paced latency critical real time targets. After quite

On 2020/2/4 ??4:21, Zhu Lingshan wrote: >> +static const struct dma_map_ops vdpasim_dma_ops = { >> +??? .map_page = vdpasim_map_page, >> +??? .unmap_page = vdpasim_unmap_page, >> +??? .alloc = vdpasim_alloc_coherent, >> +??? .free = vdpasim_free_coherent, >> +}; >> + > > Hey Jason, > > IMHO, it would be nice if dma_ops of the parent device

On 2020/2/4 ??4:21, Zhu Lingshan wrote: >> +static const struct dma_map_ops vdpasim_dma_ops = { >> +??? .map_page = vdpasim_map_page, >> +??? .unmap_page = vdpasim_unmap_page, >> +??? .alloc = vdpasim_alloc_coherent, >> +??? .free = vdpasim_free_coherent, >> +}; >> + > > Hey Jason, > > IMHO, it would be nice if dma_ops of the parent device

...e > > a common task? Can "vd_dev->vdev.dev.parent = vdpa->dev->parent;" in > > virtio_vdpa_probe() do the work? > > > > Thanks, > > BR > > Zhu Lingshan > > > Good catch. > > I think we can. IMHO you need to specify some 'dma_device', not try and play tricks with dma_ops, or assuming the parent is always the device used for dma. Jason

Hi, This is third approach (complete this time) for replacing struct dma_attrs with unsigned long. The main patch (2/45) doing the change is split into many subpatches for easier review (3-43). They should be squashed together when applying. *Important:* Patchset is *only* build tested on allyesconfigs: ARM, ARM64, i386, x86_64 and powerpc. Please provide reviewes and tests for other

...simulator (Jason) - move vDPA simulator to a dedicated directory (Lingshan) - cancel the work before release vDPA simulator Changes from V1: - drop sysfs API, leave the management interface to future development (Michael) - introduce incremental DMA ops (dma_map/dma_unmap) (Michael) - introduce dma_device and use it instead of parent device for doing IOMMU or DMA from bus driver (Michael, Jason, Ling Shan, Tiwei) - accept parent device and dma device when register vdpa device - coding style and compile fixes (Randy) - using vdpa_xxx instead of xxx_vdpa (Jason) - ove vDPA accessors to header and ma...

...simulator (Jason) - move vDPA simulator to a dedicated directory (Lingshan) - cancel the work before release vDPA simulator Changes from V1: - drop sysfs API, leave the management interface to future development (Michael) - introduce incremental DMA ops (dma_map/dma_unmap) (Michael) - introduce dma_device and use it instead of parent device for doing IOMMU or DMA from bus driver (Michael, Jason, Ling Shan, Tiwei) - accept parent device and dma device when register vdpa device - coding style and compile fixes (Randy) - using vdpa_xxx instead of xxx_vdpa (Jason) - ove vDPA accessors to header and ma...

...ore information. The work on vhost, IFCVF (intel VF driver for vDPA) and qemu is ongoing. Please provide feedback. Thanks Change from V1: - drop sysfs API, leave the management interface to future development (Michael) - introduce incremental DMA ops (dma_map/dma_unmap) (Michael) - introduce dma_device and use it instead of parent device for doing IOMMU or DMA from bus driver (Michael, Jason, Ling Shan, Tiwei) - accept parent device and dma device when register vdpa device - coding style and compile fixes (Randy) - using vdpa_xxx instead of xxx_vdpa (Jason) - ove vDPA accessors to header and ma...