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Vendor extenions are implemented in the firmware, Logical Machine Management(LMM) protocol to manage Logical Machines and CPU protocol to manage cores. The documentation could be found in file drivers/firmware/arm_scmi/vendors/imx/imx95.rst. Add below to support i.MX95 - compatible string for i.MX95 M7 - fsl,lmm-id to indicate the LMM ID of M7 LM - fsl,cpu-id to indicate the CPU ID of M7 Signed-off-by: Peng Fan --- .../bindings/remoteproc/fsl,imx-rproc.yaml | 27 ++++++++++++++++++= ++++ 1 file changed, 27 insertions(+) diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yam= l b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml index 57d75acb0b5e52ca49d1361176fdebc18a0bf7a2..a3ffab60df52be6f1d7cf4846ca= 5ba1c40f03bde 100644 --- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml @@ -28,6 +28,7 @@ properties: - fsl,imx8qxp-cm4 - fsl,imx8ulp-cm33 - fsl,imx93-cm33 + - fsl,imx95-cm7 =20 clocks: maxItems: 1 @@ -68,6 +69,12 @@ properties: Indicate whether need to load the default firmware and start the rem= ote processor automatically. =20 + fsl,cpu-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + This property is to specify the CPU ID of the remote processor + in SoC which supports System Manager + fsl,entry-address: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -78,6 +85,12 @@ properties: description: Phandle to IOMUXC GPR block which provide access to CM7 CPUWAIT bit. =20 + fsl,lmm-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + This property is to specify the Logical Machine ID of the remote pro= cessor + in SoC which supports System Manager + fsl,resource-id: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -114,6 +127,20 @@ allOf: properties: power-domains: false =20 + - if: + properties: + compatible: + contains: + const: fsl,imx95-cm7 + then: + required: + - fsl,lmm-id + - fsl,cpu-id + else: + properties: + fsl,lmm-id: false + fsl,cpu-id: false + additionalProperties: false =20 examples: --=20 2.37.1 From nobody Fri Dec 19 00:03:36 2025 Received: from DB3PR0202CU003.outbound.protection.outlook.com (mail-northeuropeazon11010025.outbound.protection.outlook.com [52.101.84.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1ACF21B4F0A; 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The System Control Management Interface(SCMI) firmware runs on the M33 core. The i.MX95 SCMI firmware named System Manager(SM) includes vendor extension protocols, Logical Machine Management(LMM) protocol and CPU protocol and etc. There are three cases for M7: (1) M7 in a separate Logical Machine(LM) that Linux can't control it. (2) M7 in a separate Logical Machine that Linux can control it using LMM protocol (3) M7 runs in same Logical Machine as A55, so Linux can control it using CPU protocol So extend the driver to using LMM and CPU protocol to manage the M7 core. - Add IMX_RPROC_SM to indicate the remote core runs on a SoC that has System Manager. - Compare linux LM ID(got using scmi_imx_lmm_info) and M7 LM ID(got from DTB), if same, use CPU protocol to start/stop. Otherwise, use LMM protocol to start/stop. Whether using CPU or LMM protocol to start/stop, the M7 status detection could use CPU protocol to detect started or not. So in imx_rproc_detect_mode, use scmi_imx_cpu_started to check the status of M7. - For above case 1 and 2, Use SCMI_IMX_LMM_POWER_ON to detect whether the M7 LM is under control of A55 LM. Current setup relies on pre-Linux software(U-Boot) to do M7 TCM ECC initialization. In future, we could add the support in Linux to decouple U-Boot and Linux. Signed-off-by: Peng Fan Reviewed-by: Daniel Baluta --- drivers/remoteproc/imx_rproc.c | 127 +++++++++++++++++++++++++++++++++++++= +++- drivers/remoteproc/imx_rproc.h | 2 + 2 files changed, 127 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 74299af1d7f10a0db794de494c52304b2323b89f..8fe3c76c9b30ed9e66d4e8c8e2e= 178a21f3b5bd2 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -21,6 +22,7 @@ #include #include #include +#include #include =20 #include "imx_rproc.h" @@ -91,6 +93,11 @@ struct imx_rproc_mem { #define ATT_CORE_MASK 0xffff #define ATT_CORE(I) BIT((I)) =20 +/* Logical Machine Operation */ +#define IMX_RPROC_FLAGS_SM_LMM_OP BIT(0) +/* Linux has permission to handle the Logical Machine of remote cores */ +#define IMX_RPROC_FLAGS_SM_LMM_AVAIL BIT(1) + static int imx_rproc_xtr_mbox_init(struct rproc *rproc, bool tx_block); static void imx_rproc_free_mbox(struct rproc *rproc); =20 @@ -115,6 +122,10 @@ struct imx_rproc { u32 entry; /* cpu start address */ u32 core_index; struct dev_pm_domain_list *pd_list; + /* For i.MX System Manager based systems */ + u32 cpuid; + u32 lmid; + u32 flags; }; =20 static const struct imx_rproc_att imx_rproc_att_imx93[] =3D { @@ -393,6 +404,30 @@ static int imx_rproc_start(struct rproc *rproc) case IMX_RPROC_SCU_API: ret =3D imx_sc_pm_cpu_start(priv->ipc_handle, priv->rsrc_id, true, priv-= >entry); break; + case IMX_RPROC_SM: + if (priv->flags & IMX_RPROC_FLAGS_SM_LMM_OP) { + if (!(priv->flags & IMX_RPROC_FLAGS_SM_LMM_AVAIL)) + return -EACCES; + + ret =3D scmi_imx_lmm_reset_vector_set(priv->lmid, priv->cpuid, 0, 0); + if (ret) { + dev_err(dev, "Failed to set reset vector lmid(%u), cpuid(%u): %d\n", + priv->lmid, priv->cpuid, ret); + } + + ret =3D scmi_imx_lmm_operation(priv->lmid, SCMI_IMX_LMM_BOOT, 0); + if (ret) + dev_err(dev, "Failed to boot lmm(%d): %d\n", ret, priv->lmid); + } else { + ret =3D scmi_imx_cpu_reset_vector_set(priv->cpuid, 0, true, false, fals= e); + if (ret) { + dev_err(dev, "Failed to set reset vector cpuid(%u): %d\n", + priv->cpuid, ret); + } + + ret =3D scmi_imx_cpu_start(priv->cpuid, true); + } + break; default: return -EOPNOTSUPP; } @@ -435,6 +470,16 @@ static int imx_rproc_stop(struct rproc *rproc) case IMX_RPROC_SCU_API: ret =3D imx_sc_pm_cpu_start(priv->ipc_handle, priv->rsrc_id, false, priv= ->entry); break; + case IMX_RPROC_SM: + if (priv->flags & IMX_RPROC_FLAGS_SM_LMM_OP) { + if (priv->flags & IMX_RPROC_FLAGS_SM_LMM_AVAIL) + ret =3D scmi_imx_lmm_operation(priv->lmid, SCMI_IMX_LMM_SHUTDOWN, 0); + else + ret =3D -EACCES; + } else { + ret =3D scmi_imx_cpu_start(priv->cpuid, false); + } + break; default: return -EOPNOTSUPP; } @@ -549,9 +594,11 @@ static int imx_rproc_prepare(struct rproc *rproc) { struct imx_rproc *priv =3D rproc->priv; struct device_node *np =3D priv->dev->of_node; + const struct imx_rproc_dcfg *dcfg =3D priv->dcfg; struct of_phandle_iterator it; struct rproc_mem_entry *mem; struct reserved_mem *rmem; + int ret; u32 da; =20 /* Register associated reserved memory regions */ @@ -592,6 +639,38 @@ static int imx_rproc_prepare(struct rproc *rproc) rproc_add_carveout(rproc, mem); } =20 + switch (dcfg->method) { + case IMX_RPROC_SM: + if (!(priv->flags & IMX_RPROC_FLAGS_SM_LMM_OP)) + break; + /* + * Power on the Logical Machine to make sure TCM is available. + * Also serve as permission check. If in different Logical + * Machine, and linux has permission to handle the Logical + * Machine, set IMX_RPROC_FLAGS_SM_LMM_AVAIL. + */ + ret =3D scmi_imx_lmm_operation(priv->lmid, SCMI_IMX_LMM_POWER_ON, 0); + if (ret =3D=3D 0) { + dev_info(priv->dev, "lmm(%d) powered on\n", priv->lmid); + priv->flags |=3D IMX_RPROC_FLAGS_SM_LMM_AVAIL; + } else if (ret =3D=3D -EACCES) { + dev_info(priv->dev, "lmm(%d) not under Linux Control\n", priv->lmid); + /* + * If remote cores boots up, continue the rpmsg channel setup, + * else linux have no permission, so return -EACCES. + */ + if (priv->rproc->state !=3D RPROC_DETACHED) + return -EACCES; + } else if (ret) { + dev_err(priv->dev, "Failed to power on lmm(%d): %d\n", ret, priv->lmid); + return ret; + } + + break; + default: + break; + }; + return 0; } =20 @@ -911,13 +990,53 @@ static int imx_rproc_detect_mode(struct imx_rproc *pr= iv) struct regmap_config config =3D { .name =3D "imx-rproc" }; const struct imx_rproc_dcfg *dcfg =3D priv->dcfg; struct device *dev =3D priv->dev; + struct scmi_imx_lmm_info info; struct regmap *regmap; struct arm_smccc_res res; + bool started =3D false; int ret; u32 val; u8 pt; =20 switch (dcfg->method) { + case IMX_RPROC_SM: + /* Get current Linux Logical Machine ID */ + ret =3D scmi_imx_lmm_info(LMM_ID_DISCOVER, &info); + if (ret) { + dev_err(dev, "Failed to get current LMM ID err: %d\n", ret); + return ret; + } + + ret =3D of_property_read_u32(dev->of_node, "fsl,cpu-id", &priv->cpuid); + if (ret) { + dev_err(dev, "No fsl,cpu-id property\n"); + return ret; + } + + ret =3D of_property_read_u32(dev->of_node, "fsl,lmm-id", &priv->lmid); + if (ret) { + dev_info(dev, "No fsl,lmm-id property\n"); + return ret; + } + + /* + * Check whether remote processor is in same Logical Machine as Linux. + * If no, need use Logical Machine API to manage remote processor, and + * set IMX_RPROC_FLAGS_SM_LMM_OP. + * If yes, use CPU protocol API to manage remote processor. + */ + if (priv->lmid !=3D info.lmid) { + priv->flags |=3D IMX_RPROC_FLAGS_SM_LMM_OP; + dev_info(dev, "Using LMM Protocol OPS\n"); + } else { + dev_info(dev, "Using CPU Protocol OPS\n"); + } + + scmi_imx_cpu_started(priv->cpuid, &started); + if (started) + priv->rproc->state =3D RPROC_DETACHED; + + return 0; case IMX_RPROC_NONE: priv->rproc->state =3D RPROC_DETACHED; return 0; @@ -1029,8 +1148,12 @@ static int imx_rproc_clk_enable(struct imx_rproc *pr= iv) struct device *dev =3D priv->dev; int ret; =20 - /* Remote core is not under control of Linux */ - if (dcfg->method =3D=3D IMX_RPROC_NONE) + /* + * IMX_RPROC_NONE indicates not under control of Linux. + * System Manager(SM) firmware automatically configures clock, + * so bypass the clk settings for IMX_RPROC_SM. + */ + if (dcfg->method =3D=3D IMX_RPROC_NONE || dcfg->method =3D=3D IMX_RPROC_S= M) return 0; =20 priv->clk =3D devm_clk_get(dev, NULL); diff --git a/drivers/remoteproc/imx_rproc.h b/drivers/remoteproc/imx_rproc.h index cfd38d37e1467d1d9e6f89be146c0b53262b92a0..e3e851d88fb069a589531ea21a3= 790fd62fde57d 100644 --- a/drivers/remoteproc/imx_rproc.h +++ b/drivers/remoteproc/imx_rproc.h @@ -26,6 +26,8 @@ enum imx_rproc_method { IMX_RPROC_SCU_API, /* Through Reset Controller API */ IMX_RPROC_RESET_CONTROLLER, + /* Through System Manager */ + IMX_RPROC_SM, }; 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}; =20 +static const struct imx_rproc_att imx_rproc_att_imx95_m7[] =3D { + /* dev addr , sys addr , size , flags */ + /* TCM CODE NON-SECURE */ + { 0x00000000, 0x203C0000, 0x00040000, ATT_OWN | ATT_IOMEM }, + + /* TCM SYS NON-SECURE*/ + { 0x20000000, 0x20400000, 0x00040000, ATT_OWN | ATT_IOMEM }, + + /* DDR */ + { 0x80000000, 0x80000000, 0x50000000, 0 }, +}; + static const struct imx_rproc_att imx_rproc_att_imx93[] =3D { /* dev addr , sys addr , size , flags */ /* TCM CODE NON-SECURE */ @@ -374,6 +386,12 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx93= =3D { .method =3D IMX_RPROC_SMC, }; =20 +static const struct imx_rproc_dcfg imx_rproc_cfg_imx95_m7 =3D { + .att =3D imx_rproc_att_imx95_m7, + .att_size =3D ARRAY_SIZE(imx_rproc_att_imx95_m7), + .method =3D IMX_RPROC_SM, +}; + static int imx_rproc_start(struct rproc *rproc) { struct imx_rproc *priv =3D rproc->priv; @@ -1315,6 +1333,7 @@ static const struct of_device_id imx_rproc_of_match[]= =3D { { .compatible =3D "fsl,imx8qm-cm4", .data =3D &imx_rproc_cfg_imx8qm }, { .compatible =3D "fsl,imx8ulp-cm33", .data =3D &imx_rproc_cfg_imx8ulp }, { .compatible =3D "fsl,imx93-cm33", .data =3D &imx_rproc_cfg_imx93 }, + { .compatible =3D "fsl,imx95-cm7", .data =3D &imx_rproc_cfg_imx95_m7 }, {}, }; MODULE_DEVICE_TABLE(of, imx_rproc_of_match); --=20 2.37.1