Add single core R5F IPC for AM62 SoC family

The config PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE
is set only when cluster mode is set to
CLUSTER_MODE_SINGLECPU and cluster mode
is already configured before setting this config.

So directly check for cluster mode instead of checking soc_data->single_cpu_mode first and then checking cluster mode.

Signed-off-by Devarsh Thakkar <[email protected]>

---
V6: No change

---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

drivers/remoteproc/ti_k3_r5_remoteproc.c +0 -7

index 0481926c6975..036c9dc217f3 100644
@@ -875,15 +875,14 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 	boot_vec = 0x0;
 	if (core == core0) {
 		clr_cfg = PROC_BOOT_CFG_FLAG_R5_TEINIT;
-		if (cluster->soc_data->single_cpu_mode) {
-			/*
-			 * Single-CPU configuration bit can only be configured
-			 * on Core0 and system firmware will NACK any requests
-			 * with the bit configured, so program it only on
-			 * permitted cores
-			 */

drivers/remoteproc/ti_k3_r5_remoteproc.c +0 -0

 		} else {
 			/*
 			 * LockStep configuration bit is Read-only on Split-mode

Signature · 1 line

2.34.1

AM62 family of devices don't have a R5F cluster, instead they have single core DM R5F.
Add new compatible string ti,am62-r5fss to support this scenario.

Quoted 4 lines · Devarsh Thakkar

AM62 family of devices don't have a R5F cluster, instead they have single core DM R5F.
Add new compatible string ti,am62-r5fss to support this scenario.

This is a friendly reminder during the review process.

It looks like you received a tag and forgot to add it.

If you do not know the process, here is a short explanation:
Please add Acked-by/Reviewed-by/Tested-by tags when posting new versions. However, there's no need to repost patches *only* to add the tags. The upstream maintainer will do that for acks received on the version they apply.

https://elixir.bootlin.com/linux/v5.17/source/Documentation/process/submitting-patches.rst#L540

If a tag was not added on purpose, please state why and what changed.

Best regards,
Krzysztof

Hi Krzysztof,

Quoted 16 lines · Krzysztof Kozlowski

Quoted 4 lines · Devarsh Thakkar

AM62 family of devices don't have a R5F cluster, instead they have single core DM R5F.
Add new compatible string ti,am62-r5fss to support this scenario.

This is a friendly reminder during the review process.

It looks like you received a tag and forgot to add it.

If you do not know the process, here is a short explanation:
Please add Acked-by/Reviewed-by/Tested-by tags when posting new versions. However, there's no need to repost patches *only* to add the tags. The upstream maintainer will do that for acks received on the version they apply.

Quoted 3 lines

https://elixir.bootlin.com/linux/v5.17/source/Documentation/process/submitting-patches.rst#L540

If a tag was not added on purpose, please state why and what changed.

I apologize if it was not clear but yes I didn't put the tag as patch was updated to use cluster-mode=3 for am62x as per review comments on
https://lore.kernel.org/all/20230110183505.GA2741090@p14s/

I'll append a note below commit message on Reviewed-By removal when I post the next series.

Regards
Devarsh

Quoted 5 lines

Best regards,
Krzysztof

AM62 and AM62A SoCs use single core R5F which is a new scenario different than the one being used with CLUSTER_MODE_SINGLECPU which is for utilizing a single core from a set of cores available in R5F cluster present in the SoC.

To support this single core scenario map it with newly defined CLUSTER_MODE_SINGLECORE and use it when compatible is set to ti,am62-r5fss.

Also set PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE config for CLUSTER_MODE_SINGLECORE too as it is required by R5 core when it is being as general purpose core instead of device manager.

Signed-off-by Devarsh Thakkar <[email protected]>

---
V2:
- Fix indentation and ordering issues as per review comments V3:
- Change CLUSTER_MODE_NONE value to -1
V4:
- No change
V5:
- No change (fixing typo in email address)
V6:
- Use CLUSTER_MODE_SINGLECORE for AM62x
- Set PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE for single core.

---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 62 +++++++++++++++++++-----
 1 file changed, 49 insertions(+), 13 deletions(-)

drivers/remoteproc/ti_k3_r5_remoteproc.c +9 -4

index 036c9dc217f3..089215144e6b 100644
@@ -71,14 +71,16 @@ struct k3_r5_mem {
 /*
  * All cluster mode values are not applicable on all SoCs. The following
  * are the modes supported on various SoCs:
- *   Split mode      : AM65x, J721E, J7200 and AM64x SoCs
- *   LockStep mode   : AM65x, J721E and J7200 SoCs
- *   Single-CPU mode : AM64x SoCs only
+ *   Split mode       : AM65x, J721E, J7200 and AM64x SoCs
+ *   LockStep mode    : AM65x, J721E and J7200 SoCs
+ *   Single-CPU mode  : AM64x SoCs only
+ *   Single-Core mode : AM62x, AM62A SoCs
  */
 enum cluster_mode {
 	CLUSTER_MODE_SPLIT = 0,
 	CLUSTER_MODE_LOCKSTEP,
 	CLUSTER_MODE_SINGLECPU,
+	CLUSTER_MODE_SINGLECORE
 };
 
 /**

@@ -86,11 +88,13 @@ enum cluster_mode {
  * @tcm_is_double: flag to denote the larger unified TCMs in certain modes
  * @tcm_ecc_autoinit: flag to denote the auto-initialization of TCMs for ECC
  * @single_cpu_mode: flag to denote if SoC/IP supports Single-CPU mode
+ * @is_single_core: flag to denote if SoC/IP has only single core R5
  */
 struct k3_r5_soc_data {
 	bool tcm_is_double;
 	bool tcm_ecc_autoinit;
 	bool single_cpu_mode;
+	bool is_single_core;
 };
 
 /**

@@ -838,7 +842,8 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 
 	core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem);
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
-	    cluster->mode == CLUSTER_MODE_SINGLECPU) {
+	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+	    cluster->mode == CLUSTER_MODE_SINGLECORE) {
 		core = core0;
 	} else {
 		core = kproc->core;

drivers/remoteproc/ti_k3_r5_remoteproc.c +1 -0

 		} else {
 			/*

@@ -1073,6 +1079,7 @@ static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
 
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
 	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+	    cluster->mode == CLUSTER_MODE_SINGLECORE ||
 	    !cluster->soc_data->tcm_is_double)
 		return;
 

drivers/remoteproc/ti_k3_r5_remoteproc.c +34 -7

 		mode = cfg & PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE ?
 				CLUSTER_MODE_SINGLECPU : CLUSTER_MODE_SPLIT;
 	} else {

@@ -1268,9 +1277,12 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
 			goto err_add;
 		}
 
-		/* create only one rproc in lockstep mode or single-cpu mode */
+		/* create only one rproc in lockstep, single-cpu or
+		 * single core mode
+		 */
 		if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
-		    cluster->mode == CLUSTER_MODE_SINGLECPU)
+		    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+		    cluster->mode == CLUSTER_MODE_SINGLECORE)
 			break;
 	}
 

@@ -1699,12 +1711,19 @@ static int k3_r5_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	cluster->dev = dev;
+
 	/*
-	 * default to most common efuse configurations - Split-mode on AM64x
-	 * and LockStep-mode on all others
+	 * default to most common efuse configurations -
+	 * Split-mode on AM64x
+	 * Single core on AM62x
+	 * LockStep-mode on all others
 	 */
-	cluster->mode = data->single_cpu_mode ?
+	if (!data->is_single_core)
+		cluster->mode = data->single_cpu_mode ?
 				CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
+	else
+		cluster->mode = CLUSTER_MODE_SINGLECORE;
+
 	cluster->soc_data = data;
 	INIT_LIST_HEAD(&cluster->cores);
 

@@ -1716,8 +1735,14 @@ static int k3_r5_probe(struct platform_device *pdev)
 	}
 
 	num_cores = of_get_available_child_count(np);
-	if (num_cores != 2) {
-		dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n",
+	if (num_cores != 2 && !data->is_single_core) {
+		dev_err(dev, "MCU cluster requires both R5F cores to be enabled but num_cores is set to = %d\n",
+			num_cores);
+		return -ENODEV;
+	}
+
+	if (num_cores != 1 && data->is_single_core) {
+		dev_err(dev, "SoC supports only single core R5 but num_cores is set to %d\n",
 			num_cores);
 		return -ENODEV;
 	}

@@ -1759,18 +1784,28 @@ static const struct k3_r5_soc_data am65_j721e_soc_data = {
 	.tcm_is_double = false,
 	.tcm_ecc_autoinit = false,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data j7200_j721s2_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data am64_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = true,
+	.is_single_core = false,
+};
+
+static const struct k3_r5_soc_data am62_soc_data = {
+	.tcm_is_double = false,
+	.tcm_ecc_autoinit = true,
+	.single_cpu_mode = false,
+	.is_single_core = true,
 };
 
 static const struct of_device_id k3_r5_of_match[] = {

@@ -1778,6 +1813,7 @@ static const struct of_device_id k3_r5_of_match[] = {
 	{ .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, },
 	{ .compatible = "ti,j7200-r5fss", .data = &j7200_j721s2_soc_data, },
 	{ .compatible = "ti,am64-r5fss",  .data = &am64_soc_data, },
+	{ .compatible = "ti,am62-r5fss",  .data = &am62_soc_data, },
 	{ .compatible = "ti,j721s2-r5fss",  .data = &j7200_j721s2_soc_data, },
 	{ /* sentinel */ },
 };

Signature · 1 line

2.34.1

Quoted 80 lines · Devarsh Thakkar

AM62 and AM62A SoCs use single core R5F which is a new scenario different than the one being used with CLUSTER_MODE_SINGLECPU which is for utilizing a single core from a set of cores available in R5F cluster present in the SoC.

To support this single core scenario map it with newly defined CLUSTER_MODE_SINGLECORE and use it when compatible is set to ti,am62-r5fss.

Also set PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE config for CLUSTER_MODE_SINGLECORE too as it is required by R5 core when it is being as general purpose core instead of device manager.

Signed-off-by Devarsh Thakkar <[email protected]>

---
V2:
- Fix indentation and ordering issues as per review comments V3:
- Change CLUSTER_MODE_NONE value to -1
V4:
- No change
V5:
- No change (fixing typo in email address)
V6:
- Use CLUSTER_MODE_SINGLECORE for AM62x
- Set PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE for single core.

---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 62 +++++++++++++++++++-----
 1 file changed, 49 insertions(+), 13 deletions(-)

drivers/remoteproc/ti_k3_r5_remoteproc.c +9 -4

index 036c9dc217f3..089215144e6b 100644
@@ -71,14 +71,16 @@ struct k3_r5_mem {
 /*
  * All cluster mode values are not applicable on all SoCs. The following
  * are the modes supported on various SoCs:
- *   Split mode      : AM65x, J721E, J7200 and AM64x SoCs
- *   LockStep mode   : AM65x, J721E and J7200 SoCs
- *   Single-CPU mode : AM64x SoCs only
+ *   Split mode       : AM65x, J721E, J7200 and AM64x SoCs
+ *   LockStep mode    : AM65x, J721E and J7200 SoCs
+ *   Single-CPU mode  : AM64x SoCs only
+ *   Single-Core mode : AM62x, AM62A SoCs
  */
 enum cluster_mode {
 	CLUSTER_MODE_SPLIT = 0,
 	CLUSTER_MODE_LOCKSTEP,
 	CLUSTER_MODE_SINGLECPU,
+	CLUSTER_MODE_SINGLECORE
 };
 
 /**

@@ -86,11 +88,13 @@ enum cluster_mode {
  * @tcm_is_double: flag to denote the larger unified TCMs in certain modes
  * @tcm_ecc_autoinit: flag to denote the auto-initialization of TCMs for ECC
  * @single_cpu_mode: flag to denote if SoC/IP supports Single-CPU mode
+ * @is_single_core: flag to denote if SoC/IP has only single core R5
  */
 struct k3_r5_soc_data {
 	bool tcm_is_double;
 	bool tcm_ecc_autoinit;
 	bool single_cpu_mode;
+	bool is_single_core;
 };
 
 /**

@@ -838,7 +842,8 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 
 	core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem);
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
-	    cluster->mode == CLUSTER_MODE_SINGLECPU) {
+	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+	    cluster->mode == CLUSTER_MODE_SINGLECORE) {
 		core = core0;
 	} else {
 		core = kproc->core;

@@ -881,7 +886,8 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
 		 * with the bit configured, so program it only on

drivers/remoteproc/ti_k3_r5_remoteproc.c static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc) · line 891

Quoted 6 lines

drivers/remoteproc/ti_k3_r5_remoteproc.c +2 -1

 		 * permitted cores
 		 */
-		if (cluster->mode == CLUSTER_MODE_SINGLECPU) {
+		if (cluster->mode == CLUSTER_MODE_SINGLECPU ||
+		    cluster->mode == CLUSTER_MODE_SINGLECORE) {
 			set_cfg = PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE;

Why was this not part of the 5 previous version?

Quoted 12 lines

drivers/remoteproc/ti_k3_r5_remoteproc.c +1 -0

 		} else {
 			/*

@@ -1073,6 +1079,7 @@ static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
 
 	if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
 	    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+	    cluster->mode == CLUSTER_MODE_SINGLECORE ||
 	    !cluster->soc_data->tcm_is_double)
 		return;
 

drivers/remoteproc/ti_k3_r5_remoteproc.c static int k3_r5_rproc_configure_mode(struct k3_r5_rproc *kproc) · line 1158

Quoted 7 lines

drivers/remoteproc/ti_k3_r5_remoteproc.c +3 -1

@@ -1146,7 +1153,9 @@ static int k3_r5_rproc_configure_mode(struct k3_r5_rproc *kproc)
 	atcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_ATCM_EN ?  1 : 0;
 	btcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_BTCM_EN ?  1 : 0;
 	loczrama = cfg & PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE ?  1 : 0;
-	if (cluster->soc_data->single_cpu_mode) {
+	if (cluster->soc_data->is_single_core) {
+		mode = CLUSTER_MODE_SINGLECORE;
+	} else if (cluster->soc_data->single_cpu_mode) {

I have already commented on that.

Quoted 98 lines

drivers/remoteproc/ti_k3_r5_remoteproc.c +34 -7

 		mode = cfg & PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE ?
 				CLUSTER_MODE_SINGLECPU : CLUSTER_MODE_SPLIT;
 	} else {

@@ -1268,9 +1277,12 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
 			goto err_add;
 		}
 
-		/* create only one rproc in lockstep mode or single-cpu mode */
+		/* create only one rproc in lockstep, single-cpu or
+		 * single core mode
+		 */
 		if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
-		    cluster->mode == CLUSTER_MODE_SINGLECPU)
+		    cluster->mode == CLUSTER_MODE_SINGLECPU ||
+		    cluster->mode == CLUSTER_MODE_SINGLECORE)
 			break;
 	}
 

@@ -1699,12 +1711,19 @@ static int k3_r5_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	cluster->dev = dev;
+
 	/*
-	 * default to most common efuse configurations - Split-mode on AM64x
-	 * and LockStep-mode on all others
+	 * default to most common efuse configurations -
+	 * Split-mode on AM64x
+	 * Single core on AM62x
+	 * LockStep-mode on all others
 	 */
-	cluster->mode = data->single_cpu_mode ?
+	if (!data->is_single_core)
+		cluster->mode = data->single_cpu_mode ?
 				CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
+	else
+		cluster->mode = CLUSTER_MODE_SINGLECORE;
+
 	cluster->soc_data = data;
 	INIT_LIST_HEAD(&cluster->cores);
 

@@ -1716,8 +1735,14 @@ static int k3_r5_probe(struct platform_device *pdev)
 	}
 
 	num_cores = of_get_available_child_count(np);
-	if (num_cores != 2) {
-		dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n",
+	if (num_cores != 2 && !data->is_single_core) {
+		dev_err(dev, "MCU cluster requires both R5F cores to be enabled but num_cores is set to = %d\n",
+			num_cores);
+		return -ENODEV;
+	}
+
+	if (num_cores != 1 && data->is_single_core) {
+		dev_err(dev, "SoC supports only single core R5 but num_cores is set to %d\n",
 			num_cores);
 		return -ENODEV;
 	}

@@ -1759,18 +1784,28 @@ static const struct k3_r5_soc_data am65_j721e_soc_data = {
 	.tcm_is_double = false,
 	.tcm_ecc_autoinit = false,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data j7200_j721s2_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = false,
+	.is_single_core = false,
 };
 
 static const struct k3_r5_soc_data am64_soc_data = {
 	.tcm_is_double = true,
 	.tcm_ecc_autoinit = true,
 	.single_cpu_mode = true,
+	.is_single_core = false,
+};
+
+static const struct k3_r5_soc_data am62_soc_data = {
+	.tcm_is_double = false,
+	.tcm_ecc_autoinit = true,
+	.single_cpu_mode = false,
+	.is_single_core = true,
 };
 
 static const struct of_device_id k3_r5_of_match[] = {

@@ -1778,6 +1813,7 @@ static const struct of_device_id k3_r5_of_match[] = {
 	{ .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, },
 	{ .compatible = "ti,j7200-r5fss", .data = &j7200_j721s2_soc_data, },
 	{ .compatible = "ti,am64-r5fss",  .data = &am64_soc_data, },
+	{ .compatible = "ti,am62-r5fss",  .data = &am62_soc_data, },
 	{ .compatible = "ti,j721s2-r5fss",  .data = &j7200_j721s2_soc_data, },
 	{ /* sentinel */ },
 };

Signature · 1 line

2.34.1