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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(the ID is fixed as 1 in SM firmware if M7 is in a seprate LM), if Linux LM ID equals M7 LM ID(linux and M7 in same LM), 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. Reviewed-by: Daniel Baluta Reviewed-by: Frank Li Signed-off-by: Peng Fan --- drivers/remoteproc/Kconfig | 2 + drivers/remoteproc/imx_rproc.c | 123 +++++++++++++++++++++++++++++++++++++= +++- drivers/remoteproc/imx_rproc.h | 5 ++ 3 files changed, 127 insertions(+), 3 deletions(-) diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 48a0d3a69ed08057716f1e7ea950899f60bbe0cf..ee54436fea5ad08a9c198ce74d4= 4ce7a9aa206de 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -27,6 +27,8 @@ config IMX_REMOTEPROC tristate "i.MX remoteproc support" depends on ARCH_MXC depends on HAVE_ARM_SMCCC + depends on IMX_SCMI_CPU_DRV || !IMX_SCMI_CPU_DRV + depends on IMX_SCMI_LMM_DRV || !IMX_SCMI_LMM_DRV select MAILBOX help Say y here to support iMX's remote processors via the remote diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index a6eef0080ca9e46efe60dcb3878b9efdbdc0f08e..151b9ca34bac2dac9df0ed873f4= 93791f2d1466e 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -22,6 +23,7 @@ #include #include #include +#include #include =20 #include "imx_rproc.h" @@ -92,6 +94,11 @@ 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 @@ -116,6 +123,8 @@ 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 flags; }; =20 static const struct imx_rproc_att imx_rproc_att_imx93[] =3D { @@ -394,6 +403,30 @@ 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(dcfg->lmid, dcfg->cpuid, 0, 0); + if (ret) { + dev_err(dev, "Failed to set reset vector lmid(%u), cpuid(%u): %d\n", + dcfg->lmid, dcfg->cpuid, ret); + } + + ret =3D scmi_imx_lmm_operation(dcfg->lmid, SCMI_IMX_LMM_BOOT, 0); + if (ret) + dev_err(dev, "Failed to boot lmm(%d): %d\n", ret, dcfg->lmid); + } else { + ret =3D scmi_imx_cpu_reset_vector_set(dcfg->cpuid, 0, true, false, fals= e); + if (ret) { + dev_err(dev, "Failed to set reset vector cpuid(%u): %d\n", + dcfg->cpuid, ret); + } + + ret =3D scmi_imx_cpu_start(dcfg->cpuid, true); + } + break; default: return -EOPNOTSUPP; } @@ -436,6 +469,16 @@ 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(dcfg->lmid, SCMI_IMX_LMM_SHUTDOWN, 0); + else + ret =3D -EACCES; + } else { + ret =3D scmi_imx_cpu_start(dcfg->cpuid, false); + } + break; default: return -EOPNOTSUPP; } @@ -546,10 +589,48 @@ static int imx_rproc_mem_release(struct rproc *rproc, return 0; } =20 +static int imx_rproc_sm_lmm_prepare(struct rproc *rproc) +{ + struct imx_rproc *priv =3D rproc->priv; + const struct imx_rproc_dcfg *dcfg =3D priv->dcfg; + int ret; + + if (!(priv->flags & IMX_RPROC_FLAGS_SM_LMM_OP)) + return 0; + + /* + * 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(dcfg->lmid, SCMI_IMX_LMM_POWER_ON, 0); + if (ret =3D=3D 0) { + dev_info(priv->dev, "lmm(%d) powered on\n", dcfg->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", dcfg->lmid); + /* + * If remote cores boots up in detached mode, continue; + * else linux has no permission, return -EACCES. + */ + if (priv->rproc->state !=3D RPROC_DETACHED) + return -EACCES; + + /* work in state RPROC_DETACHED */ + ret =3D 0; + } else if (ret) { + dev_err(priv->dev, "Failed to power on lmm(%d): %d\n", ret, dcfg->lmid); + } + + return ret; +} + 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; @@ -593,7 +674,10 @@ static int imx_rproc_prepare(struct rproc *rproc) rproc_add_carveout(rproc, mem); } =20 - return 0; + if (dcfg->method =3D=3D IMX_RPROC_SM) + return imx_rproc_sm_lmm_prepare(rproc); + + return 0; } =20 static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *= fw) @@ -927,13 +1011,41 @@ static int imx_rproc_detect_mode(struct imx_rproc *p= riv) 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; + } + + /* + * 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 (dcfg->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"); + } + + ret =3D scmi_imx_cpu_started(dcfg->cpuid, &started); + if (ret || started) + priv->rproc->state =3D RPROC_DETACHED; + + return 0; case IMX_RPROC_NONE: priv->rproc->state =3D RPROC_DETACHED; return 0; @@ -1045,8 +1157,13 @@ 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 or it is managed by SCU API = */ - if (dcfg->method =3D=3D IMX_RPROC_NONE || dcfg->method =3D=3D IMX_RPROC_S= CU_API) + /* + * Remote core is not under control of Linux or it is managed by SCU API. + * System Manager(SM) firmware automatically configures clock, so also + * bypass the clk settings for IMX_RPROC_SM. + */ + if (dcfg->method =3D=3D IMX_RPROC_NONE || dcfg->method =3D=3D IMX_RPROC_S= CU_API || + dcfg->method =3D=3D IMX_RPROC_SM) 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..6fe8d975ed302967f27b7a4319a= 899e6f0822976 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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Add i.MX95 of_device_id entry. Reviewed-by: Daniel Baluta Reviewed-by: Frank Li Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 151b9ca34bac2dac9df0ed873f493791f2d1466e..6f83fcdcd8528e6b91269369e23= d39a0395fa8d0 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -74,6 +74,10 @@ =20 #define IMX_SC_IRQ_GROUP_REBOOTED 5 =20 +/* Must align with System Manager Firmware */ +#define IMX95_M7_CPUID 1 +#define IMX95_M7_LMID 1 + /** * struct imx_rproc_mem - slim internal memory structure * @cpu_addr: MPU virtual address of the memory region @@ -127,6 +131,18 @@ struct imx_rproc { u32 flags; }; =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 */ @@ -373,6 +389,14 @@ 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, + .cpuid =3D IMX95_M7_CPUID, + .lmid =3D IMX95_M7_LMID, +}; + static int imx_rproc_start(struct rproc *rproc) { struct imx_rproc *priv =3D rproc->priv; @@ -1338,6 +1362,7 @@ 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