On Wed, 10 Jul 2024 at 02:42, Shun-yi Wang <shun-yi.wang@xxxxxxxxxxxx> wrote: > > From: "shun-yi.wang" <shun-yi.wang@xxxxxxxxxxxx> > > In order to reserve specific Contiguous Memory Allocator (CMA) regions > for hardware use. When the name of the reserved region contains "cma", > then a corresponding CMA heap is added. > > Signed-off-by: shun-yi.wang <shun-yi.wang@xxxxxxxxxxxx> > --- > drivers/remoteproc/mtk_scp.c | 38 ++++++++++++++++++++++++++++-------- > 1 file changed, 30 insertions(+), 8 deletions(-) > I'm not sure what to do with this patch... Is it a superset of your other patch [1]? And if so why is it labelled as an RFC? Please read the documentation on submitting patches [2] and subscribe to the remoteproc mailing list to give you an idea of the patch workflow that is expected. Thanks, Mathieu [1]. [PATCH 1/1] remoteproc: mediatek: Support multiple reserved memory regions [2]. https://elixir.bootlin.com/linux/latest/source/Documentation/process/submitting-patches.rst > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index e744c07507ee..ca0a4a52ece9 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -4,6 +4,7 @@ > > #include <asm/barrier.h> > #include <linux/clk.h> > +#include <linux/dma-heap.h> > #include <linux/dma-mapping.h> > #include <linux/err.h> > #include <linux/interrupt.h> > @@ -1006,22 +1007,43 @@ EXPORT_SYMBOL_GPL(scp_mapping_dm_addr); > > static int scp_map_memory_region(struct mtk_scp *scp) > { > - int ret; > + int ret, i, err; > const struct mtk_scp_sizes_data *scp_sizes; > + struct device_node *node = scp->dev->of_node; > + struct of_phandle_iterator it; > + > + i = 0; > + of_for_each_phandle(&it, err, node, "memory-region", NULL, 0) { > + ret = of_reserved_mem_device_init_by_idx(scp->dev, node, i); > + > + if (ret) { > + dev_err(scp->dev, "failed to assign memory-region: %s\n", > + it.node->name); > + of_node_put(it.node); > + return -ENOMEM; > + } > + > +#ifdef CONFIG_DMABUF_HEAPS_CMA > + if (strstr(it.node->name, "cma")) { > + /* Reserved cma memory region */ > + ret = dma_heap_add_cma(scp->dev); > + if (ret) { > + dev_err(scp->dev, "Failed to add reserved cma"); > + of_node_put(it.node); > + return ret; > + } > + } > +#endif /* CONFIG_DMABUF_HEAPS_CMA */ > > - ret = of_reserved_mem_device_init(scp->dev); > + i++; > + } > > /* reserved memory is optional. */ > - if (ret == -ENODEV) { > + if (!i) { > dev_info(scp->dev, "skipping reserved memory initialization."); > return 0; > } > > - if (ret) { > - dev_err(scp->dev, "failed to assign memory-region: %d\n", ret); > - return -ENOMEM; > - } > - > /* Reserved SCP code size */ > scp_sizes = scp->data->scp_sizes; > scp->cpu_addr = dma_alloc_coherent(scp->dev, scp_sizes->max_dram_size, > -- > 2.18.0 >
