| Message ID | 20230215041257.14548-8-tinghan.shen@mediatek.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for MT8195 SCP 2nd core | expand |
Il 15/02/23 05:12, Tinghan Shen ha scritto: > 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. > > The resource structure of the multi-core SCP is a list of remoteproc > instances which is different to the single-core SCP. The corresponding > resource releasing action is based on the type of SCP. > > Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> > --- > drivers/remoteproc/mtk_common.h | 4 + > drivers/remoteproc/mtk_scp.c | 179 +++++++++++++++++++++++++++++--- > 2 files changed, 168 insertions(+), 15 deletions(-) > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > index 3778894c96f3..7821cb15d6fd 100644 > --- a/drivers/remoteproc/mtk_common.h > +++ b/drivers/remoteproc/mtk_common.h > @@ -140,6 +140,10 @@ struct mtk_scp { > size_t dram_size; > > struct rproc_subdev *rpmsg_subdev; > + > + struct list_head elem; > + struct list_head cluster_cores; > + struct list_head *cluster; I don't understand why you need both `cluster_cores` and `cluster`... check below. > }; > > /** > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 6270c388727a..6588e5acb159 100644 > --- a/drivers/remoteproc/mtk_scp.c > +++ b/drivers/remoteproc/mtk_scp.c > @@ -862,7 +862,9 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) > } > > static int scp_rproc_init(struct platform_device *pdev, > - struct mtk_scp_of_regs *of_regs) > + struct mtk_scp_of_regs *of_regs, > + const struct mtk_scp_of_data *of_data, > + bool is_multi_core) > { > struct device *dev = &pdev->dev; > struct device_node *np = dev->of_node; > @@ -883,7 +885,7 @@ static int scp_rproc_init(struct platform_device *pdev, > scp = (struct mtk_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_regs->reg_base; > @@ -932,9 +934,11 @@ static int scp_rproc_init(struct platform_device *pdev, > goto remove_subdev; > } > > - ret = rproc_add(rproc); > - if (ret) > - goto remove_subdev; > + if (!is_multi_core) { > + ret = rproc_add(rproc); > + if (ret) > + goto remove_subdev; > + } > > return 0; > > @@ -950,9 +954,125 @@ 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 void scp_rproc_exit(struct platform_device *pdev) > +{ > + struct mtk_scp *scp = platform_get_drvdata(pdev); > + > + rproc_del(scp->rproc); > + scp_rproc_free(scp); > +} > + > +static int scp_cluster_init(struct platform_device *pdev, > + struct mtk_scp_of_regs *of_regs) > +{ > + struct device *dev = &pdev->dev; > + struct device_node *np = dev_of_node(dev); > + struct platform_device *cpdev; > + struct device_node *child; > + const struct mtk_scp_of_data **cluster_of_data; > + struct list_head *cluster; Here you have a local `cluster` pointer..... > + struct mtk_scp *scp, *temp; > + int core_id, num_cores; > + int ret; > + > + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); > + > + for (num_cores = 0; cluster_of_data[num_cores]; num_cores++) > + ; > + > + cluster = NULL; (unrelated: please initialize cluster and core_id on the declaration, not here) > + core_id = 0; > + for_each_available_child_of_node(np, child) { > + if (core_id >= num_cores) { > + 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(cpdev, of_regs, cluster_of_data[core_id], true); > + 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); > + put_device(&cpdev->dev); > + if (core_id == 0) { > + INIT_LIST_HEAD(&scp->cluster_cores); ...then here you initialize cluster_cores, > + cluster = &scp->cluster_cores; and assign to your local `cluster` pointer and even set it > + platform_set_drvdata(pdev, cluster); as platform drvdata. > + } > + > + list_add_tail(&scp->elem, cluster); Still using the local `cluster` pointer, which is `scp->cluster_cores` > + scp->cluster = cluster; ...and here, `scp->cluster` effectively points to local `cluster`, which is anyway `scp->cluster_cores`. As far as I understand, `scp->cluster` is EITHER `scp->cluster_cores` or NULL, hence the question: why do you need both scp->cluster and scp->cluster_cores, if they're always pointing to the same list? P.S.: I won't cut the rest of the patch so that the readers of this reply won't have to click around to see the whole code; comments end here! Regards, Angelo > + > + of_node_put(child); > + 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: > + if (cluster) { > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + scp_rproc_free(scp); > + } > + } > + return ret; > +} > + > +static void scp_cluster_exit(struct platform_device *pdev) > +{ > + struct list_head *cluster = platform_get_drvdata(pdev); > + struct platform_device *cpdev; > + struct mtk_scp *scp, *temp; > + > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > + list_del(&scp->elem); > + cpdev = to_platform_device(scp->dev); > + scp_rproc_exit(cpdev); > + } > +} > + > static int scp_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > + struct device_node *np = dev->of_node; > + struct device_node *core_node; > struct resource *res; > struct mtk_scp_of_regs scp_regs; > int ret; > @@ -975,21 +1095,43 @@ static int scp_probe(struct platform_device *pdev) > scp_regs.l1tcm_phys = res->start; > } > > - return scp_rproc_init(pdev, &scp_regs); > + ret = devm_of_platform_populate(dev); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); > + > + core_node = of_get_child_by_name(np, "scp"); > + of_node_put(core_node); > + > + if (!core_node) { > + dev_info(dev, "single-core scp\n"); > + > + ret = scp_rproc_init(pdev, &scp_regs, of_device_get_match_data(dev), false); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); > + } else { > + dev_info(dev, "multi-core scp\n"); > + > + ret = scp_cluster_init(pdev, &scp_regs); > + 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 device *dev = &pdev->dev; > + struct device_node *np = dev->of_node; > + struct device_node *core_node; > > - 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); > + core_node = of_get_child_by_name(np, "scp"); > + of_node_put(core_node); > + > + if (!core_node) > + scp_rproc_exit(pdev); > + else > + scp_cluster_exit(pdev); > > return 0; > } > @@ -1068,12 +1210,19 @@ 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);
On Wed, 2023-02-15 at 13:29 +0100, AngeloGioacchino Del Regno wrote: > Il 15/02/23 05:12, Tinghan Shen ha scritto: > > 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. > > > > The resource structure of the multi-core SCP is a list of remoteproc > > instances which is different to the single-core SCP. The corresponding > > resource releasing action is based on the type of SCP. > > > > Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> > > --- > > drivers/remoteproc/mtk_common.h | 4 + > > drivers/remoteproc/mtk_scp.c | 179 +++++++++++++++++++++++++++++--- > > 2 files changed, 168 insertions(+), 15 deletions(-) > > > > diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h > > index 3778894c96f3..7821cb15d6fd 100644 > > --- a/drivers/remoteproc/mtk_common.h > > +++ b/drivers/remoteproc/mtk_common.h > > @@ -140,6 +140,10 @@ struct mtk_scp { > > size_t dram_size; > > > > struct rproc_subdev *rpmsg_subdev; > > + > > + struct list_head elem; > > + struct list_head cluster_cores; > > + struct list_head *cluster; > > I don't understand why you need both `cluster_cores` and `cluster`... check below. > > > }; > > > > /** > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > > index 6270c388727a..6588e5acb159 100644 > > --- a/drivers/remoteproc/mtk_scp.c > > +++ b/drivers/remoteproc/mtk_scp.c > > @@ -862,7 +862,9 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) > > } > > > > static int scp_rproc_init(struct platform_device *pdev, > > - struct mtk_scp_of_regs *of_regs) > > + struct mtk_scp_of_regs *of_regs, > > + const struct mtk_scp_of_data *of_data, > > + bool is_multi_core) > > { > > struct device *dev = &pdev->dev; > > struct device_node *np = dev->of_node; > > @@ -883,7 +885,7 @@ static int scp_rproc_init(struct platform_device *pdev, > > scp = (struct mtk_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_regs->reg_base; > > @@ -932,9 +934,11 @@ static int scp_rproc_init(struct platform_device *pdev, > > goto remove_subdev; > > } > > > > - ret = rproc_add(rproc); > > - if (ret) > > - goto remove_subdev; > > + if (!is_multi_core) { > > + ret = rproc_add(rproc); > > + if (ret) > > + goto remove_subdev; > > + } > > > > return 0; > > > > @@ -950,9 +954,125 @@ 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 void scp_rproc_exit(struct platform_device *pdev) > > +{ > > + struct mtk_scp *scp = platform_get_drvdata(pdev); > > + > > + rproc_del(scp->rproc); > > + scp_rproc_free(scp); > > +} > > + > > +static int scp_cluster_init(struct platform_device *pdev, > > + struct mtk_scp_of_regs *of_regs) > > +{ > > + struct device *dev = &pdev->dev; > > + struct device_node *np = dev_of_node(dev); > > + struct platform_device *cpdev; > > + struct device_node *child; > > + const struct mtk_scp_of_data **cluster_of_data; > > + struct list_head *cluster; > > Here you have a local `cluster` pointer..... > > > + struct mtk_scp *scp, *temp; > > + int core_id, num_cores; > > + int ret; > > + > > + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); > > + > > + for (num_cores = 0; cluster_of_data[num_cores]; num_cores++) > > + ; > > + > > + cluster = NULL; > > (unrelated: please initialize cluster and core_id on the declaration, not here) Ok. I'll update this in the next version. > > > + core_id = 0; > > + for_each_available_child_of_node(np, child) { > > + if (core_id >= num_cores) { > > + 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(cpdev, of_regs, cluster_of_data[core_id], true); > > + 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); > > + put_device(&cpdev->dev); > > + if (core_id == 0) { > > + INIT_LIST_HEAD(&scp->cluster_cores); > > ...then here you initialize cluster_cores, > > > + cluster = &scp->cluster_cores; > > and assign to your local `cluster` pointer and even set it > > > + platform_set_drvdata(pdev, cluster); > > as platform drvdata. > > > + } > > + > > + list_add_tail(&scp->elem, cluster); > > Still using the local `cluster` pointer, which is `scp->cluster_cores` > > > + scp->cluster = cluster; > > ...and here, `scp->cluster` effectively points to local `cluster`, which is > anyway `scp->cluster_cores`. > > As far as I understand, `scp->cluster` is EITHER `scp->cluster_cores` or NULL, > hence the question: why do you need both scp->cluster and scp->cluster_cores, > if they're always pointing to the same list? > > P.S.: I won't cut the rest of the patch so that the readers of this reply won't > have to click around to see the whole code; comments end here! > > Regards, > Angelo It's because each core is represented by a mtk_scp structure and they are linked in the list of core 0. After initialized, the data structure is depicted as below, mtk_scp for core 0 mtk_scp for core 1 elem <----------------------elem (list) | V cluster_cores <----┐ cluster_cores (not used) Λ | | | *cluster └--------*cluster (pointer) For the 2nd core scp, its cluster_cores is useless. So, I add the *cluster to point back to the cores list in the 1st core's data structure. Best regards, TingHan > > > + > > + of_node_put(child); > > + 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: > > + if (cluster) { > > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > > + list_del(&scp->elem); > > + scp_rproc_free(scp); > > + } > > + } > > + return ret; > > +} > > + > > +static void scp_cluster_exit(struct platform_device *pdev) > > +{ > > + struct list_head *cluster = platform_get_drvdata(pdev); > > + struct platform_device *cpdev; > > + struct mtk_scp *scp, *temp; > > + > > + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { > > + list_del(&scp->elem); > > + cpdev = to_platform_device(scp->dev); > > + scp_rproc_exit(cpdev); > > + } > > +} > > + > > static int scp_probe(struct platform_device *pdev) > > { > > struct device *dev = &pdev->dev; > > + struct device_node *np = dev->of_node; > > + struct device_node *core_node; > > struct resource *res; > > struct mtk_scp_of_regs scp_regs; > > int ret; > > @@ -975,21 +1095,43 @@ static int scp_probe(struct platform_device *pdev) > > scp_regs.l1tcm_phys = res->start; > > } > > > > - return scp_rproc_init(pdev, &scp_regs); > > + ret = devm_of_platform_populate(dev); > > + if (ret) > > + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); > > + > > + core_node = of_get_child_by_name(np, "scp"); > > + of_node_put(core_node); > > + > > + if (!core_node) { > > + dev_info(dev, "single-core scp\n"); > > + > > + ret = scp_rproc_init(pdev, &scp_regs, of_device_get_match_data(dev), false); > > + if (ret) > > + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); > > + } else { > > + dev_info(dev, "multi-core scp\n"); > > + > > + ret = scp_cluster_init(pdev, &scp_regs); > > + 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 device *dev = &pdev->dev; > > + struct device_node *np = dev->of_node; > > + struct device_node *core_node; > > > > - 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); > > + core_node = of_get_child_by_name(np, "scp"); > > + of_node_put(core_node); > > + > > + if (!core_node) > > + scp_rproc_exit(pdev); > > + else > > + scp_cluster_exit(pdev); > > > > return 0; > > } > > @@ -1068,12 +1210,19 @@ 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); > >
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 3778894c96f3..7821cb15d6fd 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -140,6 +140,10 @@ struct mtk_scp { size_t dram_size; struct rproc_subdev *rpmsg_subdev; + + struct list_head elem; + struct list_head cluster_cores; + struct list_head *cluster; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 6270c388727a..6588e5acb159 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -862,7 +862,9 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } static int scp_rproc_init(struct platform_device *pdev, - struct mtk_scp_of_regs *of_regs) + struct mtk_scp_of_regs *of_regs, + const struct mtk_scp_of_data *of_data, + bool is_multi_core) { struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; @@ -883,7 +885,7 @@ static int scp_rproc_init(struct platform_device *pdev, scp = (struct mtk_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_regs->reg_base; @@ -932,9 +934,11 @@ static int scp_rproc_init(struct platform_device *pdev, goto remove_subdev; } - ret = rproc_add(rproc); - if (ret) - goto remove_subdev; + if (!is_multi_core) { + ret = rproc_add(rproc); + if (ret) + goto remove_subdev; + } return 0; @@ -950,9 +954,125 @@ 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 void scp_rproc_exit(struct platform_device *pdev) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + + rproc_del(scp->rproc); + scp_rproc_free(scp); +} + +static int scp_cluster_init(struct platform_device *pdev, + struct mtk_scp_of_regs *of_regs) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct platform_device *cpdev; + struct device_node *child; + const struct mtk_scp_of_data **cluster_of_data; + struct list_head *cluster; + struct mtk_scp *scp, *temp; + int core_id, num_cores; + int ret; + + cluster_of_data = (const struct mtk_scp_of_data **)of_device_get_match_data(dev); + + for (num_cores = 0; cluster_of_data[num_cores]; num_cores++) + ; + + cluster = NULL; + core_id = 0; + for_each_available_child_of_node(np, child) { + if (core_id >= num_cores) { + 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(cpdev, of_regs, cluster_of_data[core_id], true); + 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); + put_device(&cpdev->dev); + if (core_id == 0) { + INIT_LIST_HEAD(&scp->cluster_cores); + cluster = &scp->cluster_cores; + platform_set_drvdata(pdev, cluster); + } + + list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; + + of_node_put(child); + 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: + if (cluster) { + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + scp_rproc_free(scp); + } + } + return ret; +} + +static void scp_cluster_exit(struct platform_device *pdev) +{ + struct list_head *cluster = platform_get_drvdata(pdev); + struct platform_device *cpdev; + struct mtk_scp *scp, *temp; + + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + cpdev = to_platform_device(scp->dev); + scp_rproc_exit(cpdev); + } +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *core_node; struct resource *res; struct mtk_scp_of_regs scp_regs; int ret; @@ -975,21 +1095,43 @@ static int scp_probe(struct platform_device *pdev) scp_regs.l1tcm_phys = res->start; } - return scp_rproc_init(pdev, &scp_regs); + ret = devm_of_platform_populate(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); + + core_node = of_get_child_by_name(np, "scp"); + of_node_put(core_node); + + if (!core_node) { + dev_info(dev, "single-core scp\n"); + + ret = scp_rproc_init(pdev, &scp_regs, of_device_get_match_data(dev), false); + if (ret) + return dev_err_probe(dev, ret, "Failed to initialize single-core scp\n"); + } else { + dev_info(dev, "multi-core scp\n"); + + ret = scp_cluster_init(pdev, &scp_regs); + 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 device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *core_node; - 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); + core_node = of_get_child_by_name(np, "scp"); + of_node_put(core_node); + + if (!core_node) + scp_rproc_exit(pdev); + else + scp_cluster_exit(pdev); return 0; } @@ -1068,12 +1210,19 @@ 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. The resource structure of the multi-core SCP is a list of remoteproc instances which is different to the single-core SCP. The corresponding resource releasing action is based on the type of SCP. Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com> --- drivers/remoteproc/mtk_common.h | 4 + drivers/remoteproc/mtk_scp.c | 179 +++++++++++++++++++++++++++++--- 2 files changed, 168 insertions(+), 15 deletions(-)