| Message ID | 20230426091211.21557-7-tinghan.shen@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for MT8195 SCP 2nd core | expand |
On Wed, Apr 26, 2023 at 05:12:06PM +0800, Tinghan Shen wrote: > The difference of single-core SCP and multi-core SCP device tree is > the presence of child device nodes described SCP cores. The SCP > driver populates the platform device and checks the child nodes > to identify whether it's a single-core SCP or a multi-core SCP. > > Add the remoteproc instances for single-core SCP and multi-core SCP to > the new added SCP cluster list. When the SCP driver is removed, it > cleanup resources by walking through the cluster list. > > Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> > --- > drivers/remoteproc/mtk_common.h | 3 + > drivers/remoteproc/mtk_scp.c | 188 ++++++++++++++++++++++++++++---- > 2 files changed, 172 insertions(+), 19 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index c0905aec3b4b..b73b60c22ea1 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -128,6 +128,9 @@ struct mtk_scp { > size_t dram_size; > > struct rproc_subdev *rpmsg_subdev; > + > + struct list_head elem; > + struct list_head *cluster; > }; > > /** > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 5e4982f4d5dc..0b052b0acf2e 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -28,6 +28,7 @@ struct mtk_scp_of_cluster { > void __iomem *l1tcm_base; > size_t l1tcm_size; > phys_addr_t l1tcm_phys; > + struct list_head mtk_scp_cluster; > }; > > /** > @@ -862,21 +863,31 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) > } > } > > -static int scp_rproc_init(struct platform_device *pdev) > +static int scp_rproc_init(struct platform_device *cluster_pdev, > + struct platform_device *core_pdev, > + const struct mtk_scp_of_data *of_data) > { > - struct device *dev = &pdev->dev; > - struct device_node *np = dev->of_node; > - struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); > + struct platform_device *pdev; > + struct device *dev; > + struct device_node *np; > + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(cluster_pdev); > struct mtk_scp *scp; > struct rproc *rproc; > struct resource *res; > const char *fw_name = "scp.img"; > int ret, i; > > + if (core_pdev) > + pdev = core_pdev; > + else > + pdev = cluster_pdev; After following my comment from the previous patch, there won't be a need to do this. > + > + dev = &pdev->dev; > ret = rproc_of_parse_firmware(dev, 0, &fw_name); > if (ret < 0 && ret != -EINVAL) > return ret; > > + np = dev->of_node; > rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp)); > if (!rproc) > return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n"); > @@ -884,7 +895,7 @@ static int scp_rproc_init(struct platform_device *pdev) > scp = rproc->priv; > scp->rproc = rproc; > scp->dev = dev; > - scp->data = of_device_get_match_data(dev); > + scp->data = of_data; > platform_set_drvdata(pdev, scp); > > scp->reg_base = of_cluster->reg_base; > @@ -934,10 +945,6 @@ static int scp_rproc_init(struct platform_device *pdev) > goto remove_subdev; > } > > - ret = rproc_add(rproc); > - if (ret) > - goto remove_subdev; > - > return 0; > > remove_subdev: > @@ -952,6 +959,121 @@ static int scp_rproc_init(struct platform_device *pdev) > return ret; > } > > +static void scp_rproc_free(struct mtk_scp *scp) > +{ > + int i; > + > + scp_remove_rpmsg_subdev(scp); > + scp_ipi_unregister(scp, SCP_IPI_INIT); > + scp_unmap_memory_region(scp); > + for (i = 0; i < SCP_IPI_MAX; i++) > + mutex_destroy(&scp->ipi_desc[i].lock); > + mutex_destroy(&scp->send_lock); > +} > + > +static int scp_is_single_core(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev_of_node(dev); > + struct device_node *child; > + > + child = of_get_next_available_child(np, NULL); > + if (!child) > + return dev_err_probe(dev, -ENODEV, "No child node\n"); > + > + of_node_put(child); > + return of_node_name_eq(child, "cros-ec-rpmsg"); > +} > + > +static int scp_cluster_init(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev_of_node(dev); > + struct platform_device *cpdev; > + struct device_node *child; > + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); > + const struct mtk_scp_of_data **cluster_of_data; > + struct list_head *cluster = &of_cluster->mtk_scp_cluster; > + struct mtk_scp *scp, *temp; > + int core_id = 0; > + int ret; > + > + ret = scp_is_single_core(pdev); > + if (ret < 0) > + return ret; > + > + if (ret) { > + dev_dbg(dev, "single-core scp\n"); > + > + /* When using the SCP node phandle on exported SCP APIs, the drvdata > + * is expected to be the mtk_scp object, and as a result, it is intended > + * to be overwritten for single-core SCP usage. > + */ > + ret = scp_rproc_init(pdev, NULL, of_device_get_match_data(dev)); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); > + > + scp = platform_get_drvdata(pdev); > + list_add_tail(&scp->elem, cluster); > + scp->cluster = cluster; > + } else { > + dev_dbg(dev, "multi-core scp\n"); > + > + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); > + > + for_each_available_child_of_node(np, child) { > + if (!cluster_of_data[core_id]) { > + ret = -EINVAL; > + dev_err(dev, "Not support core %d\n", core_id); > + of_node_put(child); > + goto init_fail; > + } > + > + cpdev = of_find_device_by_node(child); > + if (!cpdev) { > + ret = -ENODEV; > + dev_err(dev, "Not found platform device for core %d\n", core_id); > + of_node_put(child); > + goto init_fail; > + } > + > + ret = scp_rproc_init(pdev, cpdev, cluster_of_data[core_id]); > + if (ret) { > + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); > + put_device(&cpdev->dev); > + of_node_put(child); > + goto init_fail; > + } > + scp = platform_get_drvdata(cpdev); > + list_add_tail(&scp->elem, cluster); > + scp->cluster = cluster; > + put_device(&cpdev->dev); > + > + core_id++; > + } > + } > + > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + ret = rproc_add(scp->rproc); > + if (ret) > + goto add_fail; > + } > + > + return 0; > + > +add_fail: > + list_for_each_entry_continue(scp, cluster, elem) { > + rproc_del(scp->rproc); > + } > +init_fail: > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + scp_rproc_free(scp); > + } > + > + return ret; > +} > + > static int scp_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -983,23 +1105,44 @@ static int scp_probe(struct platform_device *pdev) > of_cluster->l1tcm_phys = res->start; > } > > + INIT_LIST_HEAD(&of_cluster->mtk_scp_cluster); > platform_set_drvdata(pdev, of_cluster); > > - return scp_rproc_init(pdev); > + ret = devm_of_platform_populate(dev); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); > + > + ret = scp_cluster_init(pdev); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to initialize scp cluster\n"); > + > + return 0; > } > > static int scp_remove(struct platform_device *pdev) > { > - struct mtk_scp *scp = platform_get_drvdata(pdev); > - int i; > + struct mtk_scp *scp, *temp; > + struct mtk_scp_of_cluster *of_cluster; > + struct list_head *cluster; > + int ret; > > - rproc_del(scp->rproc); > - scp_remove_rpmsg_subdev(scp); > - scp_ipi_unregister(scp, SCP_IPI_INIT); > - scp_unmap_memory_region(scp); > - for (i = 0; i < SCP_IPI_MAX; i++) > - mutex_destroy(&scp->ipi_desc[i].lock); > - mutex_destroy(&scp->send_lock); > + ret = scp_is_single_core(pdev); > + if (ret < 0) > + return ret; > + > + if (ret) { > + scp = platform_get_drvdata(pdev); > + cluster = scp->cluster; > + } else { > + of_cluster = platform_get_drvdata(pdev); > + cluster = &of_cluster->mtk_scp_cluster; > + } If single and multi core systems were presented the same way, i.e with a cluster and a list of SCPs, you wouldn't have to do this. I will stop here for this revision. Thanks, Mathieu > + > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + rproc_del(scp->rproc); > + scp_rproc_free(scp); > + } > > return 0; > } > @@ -1078,12 +1221,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = { > .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT, > }; > > +static const struct mtk_scp_of_data *mt8195_of_data_cores[] = { > + &mt8195_of_data, > + &mt8195_of_data_c1, > + NULL > +}; > + > static const struct of_device_id mtk_scp_of_match[] = { > { .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data }, > { .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data }, > { .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data }, > { .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data }, > { .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data }, > + { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores }, > {}, > }; > MODULE_DEVICE_TABLE(of, mtk_scp_of_match); > -- > 2.18.0 >
On Mon, 2023-05-01 at 16:31 -0600, Mathieu Poirier wrote: > External email : Please do not click links or open attachments until you have verified the sender or the content. > > > On Wed, Apr 26, 2023 at 05:12:06PM +0800, Tinghan Shen wrote: > > The difference of single-core SCP and multi-core SCP device tree is > > the presence of child device nodes described SCP cores. The SCP > > driver populates the platform device and checks the child nodes > > to identify whether it's a single-core SCP or a multi-core SCP. > > > > Add the remoteproc instances for single-core SCP and multi-core SCP to > > the new added SCP cluster list. When the SCP driver is removed, it > > cleanup resources by walking through the cluster list. > > > > Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> > > --- > > drivers/remoteproc/mtk_common.h | 3 + > > drivers/remoteproc/mtk_scp.c | 188 ++++++++++++++++++++++++++++---- > > 2 files changed, 172 insertions(+), 19 deletions(-) > > > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > > index c0905aec3b4b..b73b60c22ea1 100644 > > --- a/drivers/remoteproc/mtk_common.h > > +++ b/drivers/remoteproc/mtk_common.h > > @@ -128,6 +128,9 @@ struct mtk_scp { > > size_t dram_size; > > > > struct rproc_subdev *rpmsg_subdev; > > + > > + struct list_head elem; > > + struct list_head *cluster; > > }; > > > > /** > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > > index 5e4982f4d5dc..0b052b0acf2e 100644 > > --- a/drivers/remoteproc/mtk_scp.c > > +++ b/drivers/remoteproc/mtk_scp.c > > @@ -28,6 +28,7 @@ struct mtk_scp_of_cluster { > > void __iomem *l1tcm_base; > > size_t l1tcm_size; > > phys_addr_t l1tcm_phys; > > + struct list_head mtk_scp_cluster; > > }; > > > > /** > > @@ -862,21 +863,31 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) > > } > > } > > > > -static int scp_rproc_init(struct platform_device *pdev) > > +static int scp_rproc_init(struct platform_device *cluster_pdev, > > + struct platform_device *core_pdev, > > + const struct mtk_scp_of_data *of_data) > > { > > - struct device *dev = &pdev->dev; > > - struct device_node *np = dev->of_node; > > - struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); > > + struct platform_device *pdev; > > + struct device *dev; > > + struct device_node *np; > > + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(cluster_pdev); > > struct mtk_scp *scp; > > struct rproc *rproc; > > struct resource *res; > > const char *fw_name = "scp.img"; > > int ret, i; > > > > + if (core_pdev) > > + pdev = core_pdev; > > + else > > + pdev = cluster_pdev; > > After following my comment from the previous patch, there won't be a need to do > this. > > > + > > + dev = &pdev->dev; > > ret = rproc_of_parse_firmware(dev, 0, &fw_name); > > if (ret < 0 && ret != -EINVAL) > > return ret; > > > > + np = dev->of_node; > > rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp)); > > if (!rproc) > > return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n"); > > @@ -884,7 +895,7 @@ static int scp_rproc_init(struct platform_device *pdev) > > scp = rproc->priv; > > scp->rproc = rproc; > > scp->dev = dev; > > - scp->data = of_device_get_match_data(dev); > > + scp->data = of_data; > > platform_set_drvdata(pdev, scp); > > > > scp->reg_base = of_cluster->reg_base; > > @@ -934,10 +945,6 @@ static int scp_rproc_init(struct platform_device *pdev) > > goto remove_subdev; > > } > > > > - ret = rproc_add(rproc); > > - if (ret) > > - goto remove_subdev; > > - > > return 0; > > > > remove_subdev: > > @@ -952,6 +959,121 @@ static int scp_rproc_init(struct platform_device *pdev) > > return ret; > > } > > > > +static void scp_rproc_free(struct mtk_scp *scp) > > +{ > > + int i; > > + > > + scp_remove_rpmsg_subdev(scp); > > + scp_ipi_unregister(scp, SCP_IPI_INIT); > > + scp_unmap_memory_region(scp); > > + for (i = 0; i < SCP_IPI_MAX; i++) > > + mutex_destroy(&scp->ipi_desc[i].lock); > > + mutex_destroy(&scp->send_lock); > > +} > > + > > +static int scp_is_single_core(struct platform_device *pdev) > > +{ > > + struct device *dev = &pdev->dev; > > + struct device_node *np = dev_of_node(dev); > > + struct device_node *child; > > + > > + child = of_get_next_available_child(np, NULL); > > + if (!child) > > + return dev_err_probe(dev, -ENODEV, "No child node\n"); > > + > > + of_node_put(child); > > + return of_node_name_eq(child, "cros-ec-rpmsg"); > > +} > > + > > +static int scp_cluster_init(struct platform_device *pdev) > > +{ > > + struct device *dev = &pdev->dev; > > + struct device_node *np = dev_of_node(dev); > > + struct platform_device *cpdev; > > + struct device_node *child; > > + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); > > + const struct mtk_scp_of_data **cluster_of_data; > > + struct list_head *cluster = &of_cluster->mtk_scp_cluster; > > + struct mtk_scp *scp, *temp; > > + int core_id = 0; > > + int ret; > > + > > + ret = scp_is_single_core(pdev); > > + if (ret < 0) > > + return ret; > > + > > + if (ret) { > > + dev_dbg(dev, "single-core scp\n"); > > + > > + /* When using the SCP node phandle on exported SCP APIs, the drvdata > > + * is expected to be the mtk_scp object, and as a result, it is intended > > + * to be overwritten for single-core SCP usage. > > + */ > > + ret = scp_rproc_init(pdev, NULL, of_device_get_match_data(dev)); > > + if (ret) > > + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); > > + > > + scp = platform_get_drvdata(pdev); > > + list_add_tail(&scp->elem, cluster); > > + scp->cluster = cluster; > > + } else { > > + dev_dbg(dev, "multi-core scp\n"); > > + > > + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); > > + > > + for_each_available_child_of_node(np, child) { > > + if (!cluster_of_data[core_id]) { > > + ret = -EINVAL; > > + dev_err(dev, "Not support core %d\n", core_id); > > + of_node_put(child); > > + goto init_fail; > > + } > > + > > + cpdev = of_find_device_by_node(child); > > + if (!cpdev) { > > + ret = -ENODEV; > > + dev_err(dev, "Not found platform device for core %d\n", core_id); > > + of_node_put(child); > > + goto init_fail; > > + } > > + > > + ret = scp_rproc_init(pdev, cpdev, cluster_of_data[core_id]); > > + if (ret) { > > + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); > > + put_device(&cpdev->dev); > > + of_node_put(child); > > + goto init_fail; > > + } > > + scp = platform_get_drvdata(cpdev); > > + list_add_tail(&scp->elem, cluster); > > + scp->cluster = cluster; > > + put_device(&cpdev->dev); > > + > > + core_id++; > > + } > > + } > > + > > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > > + ret = rproc_add(scp->rproc); > > + if (ret) > > + goto add_fail; > > + } > > + > > + return 0; > > + > > +add_fail: > > + list_for_each_entry_continue(scp, cluster, elem) { > > + rproc_del(scp->rproc); > > + } > > +init_fail: > > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > > + list_del(&scp->elem); > > + scp_rproc_free(scp); > > + } > > + > > + return ret; > > +} > > + > > static int scp_probe(struct platform_device *pdev) > > { > > struct device *dev = &pdev->dev; > > @@ -983,23 +1105,44 @@ static int scp_probe(struct platform_device *pdev) > > of_cluster->l1tcm_phys = res->start; > > } > > > > + INIT_LIST_HEAD(&of_cluster->mtk_scp_cluster); > > platform_set_drvdata(pdev, of_cluster); > > > > - return scp_rproc_init(pdev); > > + ret = devm_of_platform_populate(dev); > > + if (ret) > > + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); > > + > > + ret = scp_cluster_init(pdev); > > + if (ret) > > + return dev_err_probe(dev, ret, "Failed to initialize scp cluster\n"); > > + > > + return 0; > > } > > > > static int scp_remove(struct platform_device *pdev) > > { > > - struct mtk_scp *scp = platform_get_drvdata(pdev); > > - int i; > > + struct mtk_scp *scp, *temp; > > + struct mtk_scp_of_cluster *of_cluster; > > + struct list_head *cluster; > > + int ret; > > > > - rproc_del(scp->rproc); > > - scp_remove_rpmsg_subdev(scp); > > - scp_ipi_unregister(scp, SCP_IPI_INIT); > > - scp_unmap_memory_region(scp); > > - for (i = 0; i < SCP_IPI_MAX; i++) > > - mutex_destroy(&scp->ipi_desc[i].lock); > > - mutex_destroy(&scp->send_lock); > > + ret = scp_is_single_core(pdev); > > + if (ret < 0) > > + return ret; > > + > > + if (ret) { > > + scp = platform_get_drvdata(pdev); > > + cluster = scp->cluster; > > + } else { > > + of_cluster = platform_get_drvdata(pdev); > > + cluster = &of_cluster->mtk_scp_cluster; > > + } > > If single and multi core systems were presented the same way, i.e with a cluster > and a list of SCPs, you wouldn't have to do this. I will stop here for this > revision. > > Thanks, > Mathieu I've been hesitant as to whether I can present the single and multi core systems in the same way since version 1 of this series. I was mad aware that the upstream kernel driver must retain compatibility with the current device trees when introducing a new device tree format. If it's acceptable, I'll adjust all the single-core SCP dts file and dt-bindings conform to this format in the next version. Best regards, TingHan > > > + > > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > > + list_del(&scp->elem); > > + rproc_del(scp->rproc); > > + scp_rproc_free(scp); > > + } > > > > return 0; > > } > > @@ -1078,12 +1221,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = { > > .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT, > > }; > > > > +static const struct mtk_scp_of_data *mt8195_of_data_cores[] = { > > + &mt8195_of_data, > > + &mt8195_of_data_c1, > > + NULL > > +}; > > + > > static const struct of_device_id mtk_scp_of_match[] = { > > { .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data }, > > { .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data }, > > { .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data }, > > { .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data }, > > { .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data }, > > + { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores }, > > {}, > > }; > > MODULE_DEVICE_TABLE(of, mtk_scp_of_match); > > -- > > 2.18.0 > >
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index c0905aec3b4b..b73b60c22ea1 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -128,6 +128,9 @@ struct mtk_scp { size_t dram_size; struct rproc_subdev *rpmsg_subdev; + + struct list_head elem; + struct list_head *cluster; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 5e4982f4d5dc..0b052b0acf2e 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -28,6 +28,7 @@ struct mtk_scp_of_cluster { void __iomem *l1tcm_base; size_t l1tcm_size; phys_addr_t l1tcm_phys; + struct list_head mtk_scp_cluster; }; /** @@ -862,21 +863,31 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } } -static int scp_rproc_init(struct platform_device *pdev) +static int scp_rproc_init(struct platform_device *cluster_pdev, + struct platform_device *core_pdev, + const struct mtk_scp_of_data *of_data) { - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); + struct platform_device *pdev; + struct device *dev; + struct device_node *np; + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(cluster_pdev); struct mtk_scp *scp; struct rproc *rproc; struct resource *res; const char *fw_name = "scp.img"; int ret, i; + if (core_pdev) + pdev = core_pdev; + else + pdev = cluster_pdev; + + dev = &pdev->dev; ret = rproc_of_parse_firmware(dev, 0, &fw_name); if (ret < 0 && ret != -EINVAL) return ret; + np = dev->of_node; rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp)); if (!rproc) return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n"); @@ -884,7 +895,7 @@ static int scp_rproc_init(struct platform_device *pdev) scp = rproc->priv; scp->rproc = rproc; scp->dev = dev; - scp->data = of_device_get_match_data(dev); + scp->data = of_data; platform_set_drvdata(pdev, scp); scp->reg_base = of_cluster->reg_base; @@ -934,10 +945,6 @@ static int scp_rproc_init(struct platform_device *pdev) goto remove_subdev; } - ret = rproc_add(rproc); - if (ret) - goto remove_subdev; - return 0; remove_subdev: @@ -952,6 +959,121 @@ static int scp_rproc_init(struct platform_device *pdev) return ret; } +static void scp_rproc_free(struct mtk_scp *scp) +{ + int i; + + scp_remove_rpmsg_subdev(scp); + scp_ipi_unregister(scp, SCP_IPI_INIT); + scp_unmap_memory_region(scp); + for (i = 0; i < SCP_IPI_MAX; i++) + mutex_destroy(&scp->ipi_desc[i].lock); + mutex_destroy(&scp->send_lock); +} + +static int scp_is_single_core(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct device_node *child; + + child = of_get_next_available_child(np, NULL); + if (!child) + return dev_err_probe(dev, -ENODEV, "No child node\n"); + + of_node_put(child); + return of_node_name_eq(child, "cros-ec-rpmsg"); +} + +static int scp_cluster_init(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct platform_device *cpdev; + struct device_node *child; + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); + const struct mtk_scp_of_data **cluster_of_data; + struct list_head *cluster = &of_cluster->mtk_scp_cluster; + struct mtk_scp *scp, *temp; + int core_id = 0; + int ret; + + ret = scp_is_single_core(pdev); + if (ret < 0) + return ret; + + if (ret) { + dev_dbg(dev, "single-core scp\n"); + + /* When using the SCP node phandle on exported SCP APIs, the drvdata + * is expected to be the mtk_scp object, and as a result, it is intended + * to be overwritten for single-core SCP usage. + */ + ret = scp_rproc_init(pdev, NULL, of_device_get_match_data(dev)); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); + + scp = platform_get_drvdata(pdev); + list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; + } else { + dev_dbg(dev, "multi-core scp\n"); + + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); + + for_each_available_child_of_node(np, child) { + if (!cluster_of_data[core_id]) { + ret = -EINVAL; + dev_err(dev, "Not support core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + cpdev = of_find_device_by_node(child); + if (!cpdev) { + ret = -ENODEV; + dev_err(dev, "Not found platform device for core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + ret = scp_rproc_init(pdev, cpdev, cluster_of_data[core_id]); + if (ret) { + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); + put_device(&cpdev->dev); + of_node_put(child); + goto init_fail; + } + scp = platform_get_drvdata(cpdev); + list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; + put_device(&cpdev->dev); + + core_id++; + } + } + + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + ret = rproc_add(scp->rproc); + if (ret) + goto add_fail; + } + + return 0; + +add_fail: + list_for_each_entry_continue(scp, cluster, elem) { + rproc_del(scp->rproc); + } +init_fail: + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + scp_rproc_free(scp); + } + + return ret; +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -983,23 +1105,44 @@ static int scp_probe(struct platform_device *pdev) of_cluster->l1tcm_phys = res->start; } + INIT_LIST_HEAD(&of_cluster->mtk_scp_cluster); platform_set_drvdata(pdev, of_cluster); - return scp_rproc_init(pdev); + ret = devm_of_platform_populate(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); + + ret = scp_cluster_init(pdev); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize scp cluster\n"); + + return 0; } static int scp_remove(struct platform_device *pdev) { - struct mtk_scp *scp = platform_get_drvdata(pdev); - int i; + struct mtk_scp *scp, *temp; + struct mtk_scp_of_cluster *of_cluster; + struct list_head *cluster; + int ret; - rproc_del(scp->rproc); - scp_remove_rpmsg_subdev(scp); - scp_ipi_unregister(scp, SCP_IPI_INIT); - scp_unmap_memory_region(scp); - for (i = 0; i < SCP_IPI_MAX; i++) - mutex_destroy(&scp->ipi_desc[i].lock); - mutex_destroy(&scp->send_lock); + ret = scp_is_single_core(pdev); + if (ret < 0) + return ret; + + if (ret) { + scp = platform_get_drvdata(pdev); + cluster = scp->cluster; + } else { + of_cluster = platform_get_drvdata(pdev); + cluster = &of_cluster->mtk_scp_cluster; + } + + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + rproc_del(scp->rproc); + scp_rproc_free(scp); + } return 0; } @@ -1078,12 +1221,19 @@ static const struct mtk_scp_of_data mt8195_of_data_c1 = { .host_to_scp_int_bit = MT8195_CORE1_HOST_IPC_INT_BIT, }; +static const struct mtk_scp_of_data *mt8195_of_data_cores[] = { + &mt8195_of_data, + &mt8195_of_data_c1, + NULL +}; + static const struct of_device_id mtk_scp_of_match[] = { { .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data }, { .compatible = "mediatek,mt8186-scp", .data = &mt8186_of_data }, { .compatible = "mediatek,mt8188-scp", .data = &mt8188_of_data }, { .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data }, { .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data }, + { .compatible = "mediatek,mt8195-scp-dual", .data = &mt8195_of_data_cores }, {}, }; MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
The difference of single-core SCP and multi-core SCP device tree is the presence of child device nodes described SCP cores. The SCP driver populates the platform device and checks the child nodes to identify whether it's a single-core SCP or a multi-core SCP. Add the remoteproc instances for single-core SCP and multi-core SCP to the new added SCP cluster list. When the SCP driver is removed, it cleanup resources by walking through the cluster list. Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> --- drivers/remoteproc/mtk_common.h | 3 + drivers/remoteproc/mtk_scp.c | 188 ++++++++++++++++++++++++++++---- 2 files changed, 172 insertions(+), 19 deletions(-)