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-rw-r--r--drivers/remoteproc/Kconfig1
-rw-r--r--drivers/remoteproc/imx_rproc.c209
-rw-r--r--drivers/remoteproc/pru_rproc.c3
-rw-r--r--drivers/remoteproc/qcom_q6v5.c2
-rw-r--r--drivers/remoteproc/qcom_q6v5_pas.c22
-rw-r--r--drivers/remoteproc/qcom_wcnss.c5
-rw-r--r--drivers/remoteproc/remoteproc_cdev.c2
-rw-r--r--drivers/remoteproc/remoteproc_core.c72
-rw-r--r--drivers/remoteproc/remoteproc_elf_loader.c12
-rw-r--r--drivers/remoteproc/remoteproc_virtio.c6
-rw-r--r--drivers/remoteproc/stm32_rproc.c16
-rw-r--r--drivers/remoteproc/ti_k3_r5_remoteproc.c151
12 files changed, 395 insertions, 106 deletions
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index e68fcedc999c..9a6eedc3994a 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -26,6 +26,7 @@ config REMOTEPROC_CDEV
config IMX_REMOTEPROC
tristate "i.MX remoteproc support"
depends on ARCH_MXC
+ depends on HAVE_ARM_SMCCC
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 d6338872c6db..d88f76f5305e 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -3,6 +3,7 @@
* Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
*/
+#include <linux/arm-smccc.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/interrupt.h>
@@ -50,6 +51,11 @@
#define IMX_RPROC_MEM_MAX 32
+#define IMX_SIP_RPROC 0xC2000005
+#define IMX_SIP_RPROC_START 0x00
+#define IMX_SIP_RPROC_STARTED 0x01
+#define IMX_SIP_RPROC_STOP 0x02
+
/**
* struct imx_rproc_mem - slim internal memory structure
* @cpu_addr: MPU virtual address of the memory region
@@ -74,6 +80,15 @@ struct imx_rproc_att {
int flags;
};
+/* Remote core start/stop method */
+enum imx_rproc_method {
+ IMX_RPROC_NONE,
+ /* Through syscon regmap */
+ IMX_RPROC_MMIO,
+ /* Through ARM SMCCC */
+ IMX_RPROC_SMC,
+};
+
struct imx_rproc_dcfg {
u32 src_reg;
u32 src_mask;
@@ -81,6 +96,7 @@ struct imx_rproc_dcfg {
u32 src_stop;
const struct imx_rproc_att *att;
size_t att_size;
+ enum imx_rproc_method method;
};
struct imx_rproc {
@@ -98,6 +114,36 @@ struct imx_rproc {
void __iomem *rsc_table;
};
+static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
+ /* dev addr , sys addr , size , flags */
+ /* ITCM */
+ { 0x00000000, 0x007E0000, 0x00020000, ATT_OWN },
+ /* OCRAM_S */
+ { 0x00180000, 0x00180000, 0x00009000, 0 },
+ /* OCRAM */
+ { 0x00900000, 0x00900000, 0x00020000, 0 },
+ /* OCRAM */
+ { 0x00920000, 0x00920000, 0x00020000, 0 },
+ /* OCRAM */
+ { 0x00940000, 0x00940000, 0x00050000, 0 },
+ /* QSPI Code - alias */
+ { 0x08000000, 0x08000000, 0x08000000, 0 },
+ /* DDR (Code) - alias */
+ { 0x10000000, 0x40000000, 0x0FFE0000, 0 },
+ /* DTCM */
+ { 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
+ /* OCRAM_S - alias */
+ { 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
+ /* OCRAM */
+ { 0x20200000, 0x00900000, 0x00020000, ATT_OWN },
+ /* OCRAM */
+ { 0x20220000, 0x00920000, 0x00020000, ATT_OWN },
+ /* OCRAM */
+ { 0x20240000, 0x00940000, 0x00040000, ATT_OWN },
+ /* DDR (Data) */
+ { 0x40000000, 0x40000000, 0x80000000, 0 },
+};
+
static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
/* dev addr , sys addr , size , flags */
/* TCML - alias */
@@ -126,6 +172,20 @@ static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
{ 0x40000000, 0x40000000, 0x80000000, 0 },
};
+static const struct imx_rproc_att imx_rproc_att_imx8ulp[] = {
+ {0x1FFC0000, 0x1FFC0000, 0xC0000, ATT_OWN},
+ {0x21000000, 0x21000000, 0x10000, ATT_OWN},
+ {0x80000000, 0x80000000, 0x60000000, 0}
+};
+
+static const struct imx_rproc_att imx_rproc_att_imx7ulp[] = {
+ {0x1FFD0000, 0x1FFD0000, 0x30000, ATT_OWN},
+ {0x20000000, 0x20000000, 0x10000, ATT_OWN},
+ {0x2F000000, 0x2F000000, 0x20000, ATT_OWN},
+ {0x2F020000, 0x2F020000, 0x20000, ATT_OWN},
+ {0x60000000, 0x60000000, 0x40000000, 0}
+};
+
static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
/* dev addr , sys addr , size , flags */
/* OCRAM_S (M4 Boot code) - alias */
@@ -176,6 +236,12 @@ static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
{ 0x80000000, 0x80000000, 0x60000000, 0 },
};
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
+ .att = imx_rproc_att_imx8mn,
+ .att_size = ARRAY_SIZE(imx_rproc_att_imx8mn),
+ .method = IMX_RPROC_SMC,
+};
+
static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
.src_reg = IMX7D_SRC_SCR,
.src_mask = IMX7D_M4_RST_MASK,
@@ -183,6 +249,19 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
.src_stop = IMX7D_M4_STOP,
.att = imx_rproc_att_imx8mq,
.att_size = ARRAY_SIZE(imx_rproc_att_imx8mq),
+ .method = IMX_RPROC_MMIO,
+};
+
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8ulp = {
+ .att = imx_rproc_att_imx8ulp,
+ .att_size = ARRAY_SIZE(imx_rproc_att_imx8ulp),
+ .method = IMX_RPROC_NONE,
+};
+
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx7ulp = {
+ .att = imx_rproc_att_imx7ulp,
+ .att_size = ARRAY_SIZE(imx_rproc_att_imx7ulp),
+ .method = IMX_RPROC_NONE,
};
static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
@@ -192,6 +271,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
.src_stop = IMX7D_M4_STOP,
.att = imx_rproc_att_imx7d,
.att_size = ARRAY_SIZE(imx_rproc_att_imx7d),
+ .method = IMX_RPROC_MMIO,
};
static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
@@ -201,6 +281,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
.src_stop = IMX6SX_M4_STOP,
.att = imx_rproc_att_imx6sx,
.att_size = ARRAY_SIZE(imx_rproc_att_imx6sx),
+ .method = IMX_RPROC_MMIO,
};
static int imx_rproc_start(struct rproc *rproc)
@@ -208,12 +289,24 @@ static int imx_rproc_start(struct rproc *rproc)
struct imx_rproc *priv = rproc->priv;
const struct imx_rproc_dcfg *dcfg = priv->dcfg;
struct device *dev = priv->dev;
+ struct arm_smccc_res res;
int ret;
- ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
- dcfg->src_mask, dcfg->src_start);
+ switch (dcfg->method) {
+ case IMX_RPROC_MMIO:
+ ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
+ dcfg->src_start);
+ break;
+ case IMX_RPROC_SMC:
+ arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_START, 0, 0, 0, 0, 0, 0, &res);
+ ret = res.a0;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
if (ret)
- dev_err(dev, "Failed to enable M4!\n");
+ dev_err(dev, "Failed to enable remote core!\n");
return ret;
}
@@ -223,12 +316,26 @@ static int imx_rproc_stop(struct rproc *rproc)
struct imx_rproc *priv = rproc->priv;
const struct imx_rproc_dcfg *dcfg = priv->dcfg;
struct device *dev = priv->dev;
+ struct arm_smccc_res res;
int ret;
- ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
- dcfg->src_mask, dcfg->src_stop);
+ switch (dcfg->method) {
+ case IMX_RPROC_MMIO:
+ ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
+ dcfg->src_stop);
+ break;
+ case IMX_RPROC_SMC:
+ arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STOP, 0, 0, 0, 0, 0, 0, &res);
+ ret = res.a0;
+ if (res.a1)
+ dev_info(dev, "Not in wfi, force stopped\n");
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
if (ret)
- dev_err(dev, "Failed to stop M4!\n");
+ dev_err(dev, "Failed to stop remote core\n");
return ret;
}
@@ -560,12 +667,37 @@ static void imx_rproc_free_mbox(struct rproc *rproc)
static int imx_rproc_detect_mode(struct imx_rproc *priv)
{
+ struct regmap_config config = { .name = "imx-rproc" };
const struct imx_rproc_dcfg *dcfg = priv->dcfg;
struct device *dev = priv->dev;
+ struct regmap *regmap;
+ struct arm_smccc_res res;
int ret;
u32 val;
- ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
+ switch (dcfg->method) {
+ case IMX_RPROC_NONE:
+ priv->rproc->state = RPROC_DETACHED;
+ return 0;
+ case IMX_RPROC_SMC:
+ arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STARTED, 0, 0, 0, 0, 0, 0, &res);
+ if (res.a0)
+ priv->rproc->state = RPROC_DETACHED;
+ return 0;
+ default:
+ break;
+ }
+
+ regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "failed to find syscon\n");
+ return PTR_ERR(regmap);
+ }
+
+ priv->regmap = regmap;
+ regmap_attach_dev(dev, regmap, &config);
+
+ ret = regmap_read(regmap, dcfg->src_reg, &val);
if (ret) {
dev_err(dev, "Failed to read src\n");
return ret;
@@ -577,24 +709,44 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
return 0;
}
+static int imx_rproc_clk_enable(struct imx_rproc *priv)
+{
+ const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+ struct device *dev = priv->dev;
+ int ret;
+
+ /* Remote core is not under control of Linux */
+ if (dcfg->method == IMX_RPROC_NONE)
+ return 0;
+
+ priv->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev, "Failed to get clock\n");
+ return PTR_ERR(priv->clk);
+ }
+
+ /*
+ * clk for M4 block including memory. Should be
+ * enabled before .start for FW transfer.
+ */
+ ret = clk_prepare_enable(priv->clk);
+ if (ret) {
+ dev_err(dev, "Failed to enable clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+
static int imx_rproc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct imx_rproc *priv;
struct rproc *rproc;
- struct regmap_config config = { .name = "imx-rproc" };
const struct imx_rproc_dcfg *dcfg;
- struct regmap *regmap;
int ret;
- regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
- if (IS_ERR(regmap)) {
- dev_err(dev, "failed to find syscon\n");
- return PTR_ERR(regmap);
- }
- regmap_attach_dev(dev, regmap, &config);
-
/* set some other name then imx */
rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
NULL, sizeof(*priv));
@@ -609,7 +761,6 @@ static int imx_rproc_probe(struct platform_device *pdev)
priv = rproc->priv;
priv->rproc = rproc;
- priv->regmap = regmap;
priv->dcfg = dcfg;
priv->dev = dev;
@@ -635,25 +786,15 @@ static int imx_rproc_probe(struct platform_device *pdev)
if (ret)
goto err_put_mbox;
- priv->clk = devm_clk_get(dev, NULL);
- if (IS_ERR(priv->clk)) {
- dev_err(dev, "Failed to get clock\n");
- ret = PTR_ERR(priv->clk);
- goto err_put_mbox;
- }
-
- /*
- * clk for M4 block including memory. Should be
- * enabled before .start for FW transfer.
- */
- ret = clk_prepare_enable(priv->clk);
- if (ret) {
- dev_err(&rproc->dev, "Failed to enable clock\n");
+ ret = imx_rproc_clk_enable(priv);
+ if (ret)
goto err_put_mbox;
- }
INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
+ if (rproc->state != RPROC_DETACHED)
+ rproc->auto_boot = of_property_read_bool(np, "fsl,auto-boot");
+
ret = rproc_add(rproc);
if (ret) {
dev_err(dev, "rproc_add failed\n");
@@ -688,10 +829,14 @@ static int imx_rproc_remove(struct platform_device *pdev)
}
static const struct of_device_id imx_rproc_of_match[] = {
+ { .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
+ { .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
+ { .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
+ { .compatible = "fsl,imx8ulp-cm33", .data = &imx_rproc_cfg_imx8ulp },
{},
};
MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
index e5778e476245..1777a01fa84e 100644
--- a/drivers/remoteproc/pru_rproc.c
+++ b/drivers/remoteproc/pru_rproc.c
@@ -887,6 +887,9 @@ static const struct of_device_id pru_rproc_match[] = {
{ .compatible = "ti,am3356-pru", .data = &pru_data },
{ .compatible = "ti,am4376-pru", .data = &pru_data },
{ .compatible = "ti,am5728-pru", .data = &pru_data },
+ { .compatible = "ti,am642-pru", .data = &k3_pru_data },
+ { .compatible = "ti,am642-rtu", .data = &k3_rtu_data },
+ { .compatible = "ti,am642-tx-pru", .data = &k3_tx_pru_data },
{ .compatible = "ti,k2g-pru", .data = &pru_data },
{ .compatible = "ti,am654-pru", .data = &k3_pru_data },
{ .compatible = "ti,am654-rtu", .data = &k3_rtu_data },
diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
index 9627a950928e..7e9244c748da 100644
--- a/drivers/remoteproc/qcom_q6v5.c
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -280,7 +280,7 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
return ret;
}
- q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
+ q6v5->state = devm_qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
if (IS_ERR(q6v5->state)) {
dev_err(&pdev->dev, "failed to acquire stop state\n");
return PTR_ERR(q6v5->state);
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index b921fc26cd04..a79bee901e9b 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -689,6 +689,25 @@ static const struct adsp_data mpss_resource_init = {
.ssctl_id = 0x12,
};
+static const struct adsp_data sc8180x_mpss_resource = {
+ .crash_reason_smem = 421,
+ .firmware_name = "modem.mdt",
+ .pas_id = 4,
+ .has_aggre2_clk = false,
+ .auto_boot = false,
+ .active_pd_names = (char*[]){
+ "load_state",
+ NULL
+ },
+ .proxy_pd_names = (char*[]){
+ "cx",
+ NULL
+ },
+ .ssr_name = "mpss",
+ .sysmon_name = "modem",
+ .ssctl_id = 0x12,
+};
+
static const struct adsp_data slpi_resource_init = {
.crash_reason_smem = 424,
.firmware_name = "slpi.mdt",
@@ -811,6 +830,9 @@ static const struct of_device_id adsp_of_match[] = {
{ .compatible = "qcom,qcs404-cdsp-pas", .data = &cdsp_resource_init },
{ .compatible = "qcom,qcs404-wcss-pas", .data = &wcss_resource_init },
{ .compatible = "qcom,sc7180-mpss-pas", .data = &mpss_resource_init},
+ { .compatible = "qcom,sc8180x-adsp-pas", .data = &sm8150_adsp_resource},
+ { .compatible = "qcom,sc8180x-cdsp-pas", .data = &sm8150_cdsp_resource},
+ { .compatible = "qcom,sc8180x-mpss-pas", .data = &sc8180x_mpss_resource},
{ .compatible = "qcom,sdm845-adsp-pas", .data = &adsp_resource_init},
{ .compatible = "qcom,sdm845-cdsp-pas", .data = &cdsp_resource_init},
{ .compatible = "qcom,sdx55-mpss-pas", .data = &sdx55_mpss_resource},
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index 5f3455aa7e0e..f1cbc6b2edbb 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -624,8 +624,8 @@ static int wcnss_probe(struct platform_device *pdev)
wcnss->stop_ack_irq = ret;
if (wcnss->stop_ack_irq) {
- wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
- &wcnss->stop_bit);
+ wcnss->state = devm_qcom_smem_state_get(&pdev->dev, "stop",
+ &wcnss->stop_bit);
if (IS_ERR(wcnss->state)) {
ret = PTR_ERR(wcnss->state);
goto detach_pds;
@@ -659,7 +659,6 @@ static int wcnss_remove(struct platform_device *pdev)
of_platform_depopulate(&pdev->dev);
- qcom_smem_state_put(wcnss->state);
rproc_del(wcnss->rproc);
qcom_remove_sysmon_subdev(wcnss->sysmon);
diff --git a/drivers/remoteproc/remoteproc_cdev.c b/drivers/remoteproc/remoteproc_cdev.c
index 0b8a84c04f76..4ad98b0b8caa 100644
--- a/drivers/remoteproc/remoteproc_cdev.c
+++ b/drivers/remoteproc/remoteproc_cdev.c
@@ -124,7 +124,7 @@ int rproc_char_device_add(struct rproc *rproc)
void rproc_char_device_remove(struct rproc *rproc)
{
- __unregister_chrdev(MAJOR(rproc->dev.devt), rproc->index, 1, "remoteproc");
+ cdev_del(&rproc->cdev);
}
void __init rproc_init_cdev(void)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 39cf44cb0803..7de5905d276a 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -166,6 +166,7 @@ EXPORT_SYMBOL(rproc_va_to_pa);
* @rproc: handle of a remote processor
* @da: remoteproc device address to translate
* @len: length of the memory region @da is pointing to
+ * @is_iomem: optional pointer filled in to indicate if @da is iomapped memory
*
* Some remote processors will ask us to allocate them physically contiguous
* memory regions (which we call "carveouts"), and map them to specific
@@ -183,12 +184,12 @@ EXPORT_SYMBOL(rproc_va_to_pa);
* translations on the internal remoteproc memory regions through a platform
* implementation specific da_to_va ops, if present.
*
- * The function returns a valid kernel address on success or NULL on failure.
- *
* Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too,
* but only on kernel direct mapped RAM memory. Instead, we're just using
* here the output of the DMA API for the carveouts, which should be more
* correct.
+ *
+ * Return: a valid kernel address on success or NULL on failure
*/
void *rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
{
@@ -509,7 +510,7 @@ static int copy_dma_range_map(struct device *to, struct device *from)
* use RSC_DEVMEM resource entries to map their required @da to the physical
* address of their base CMA region (ouch, hacky!).
*
- * Returns 0 on success, or an appropriate error code otherwise
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_vdev(struct rproc *rproc, void *ptr,
int offset, int avail)
@@ -644,7 +645,7 @@ void rproc_vdev_release(struct kref *ref)
* support dynamically allocating this address using the generic
* DMA API (but currently there isn't a use case for that).
*
- * Returns 0 on success, or an appropriate error code otherwise
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_trace(struct rproc *rproc, void *ptr,
int offset, int avail)
@@ -721,6 +722,8 @@ static int rproc_handle_trace(struct rproc *rproc, void *ptr,
* tell us ranges of physical addresses the firmware is allowed to request,
* and not allow firmwares to request access to physical addresses that
* are outside those ranges.
+ *
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_devmem(struct rproc *rproc, void *ptr,
int offset, int avail)
@@ -783,6 +786,8 @@ out:
*
* This function allocate specified memory entry @mem using
* dma_alloc_coherent() as default allocator
+ *
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_alloc_carveout(struct rproc *rproc,
struct rproc_mem_entry *mem)
@@ -889,6 +894,8 @@ dma_free:
*
* This function releases specified memory entry @mem allocated via
* rproc_alloc_carveout() function by @rproc.
+ *
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_release_carveout(struct rproc *rproc,
struct rproc_mem_entry *mem)
@@ -918,6 +925,8 @@ static int rproc_release_carveout(struct rproc *rproc,
* (e.g. CMA) more efficiently, and also minimizes the number of TLB entries
* needed to map it (in case @rproc is using an IOMMU). Reducing the TLB
* pressure is important; it may have a substantial impact on performance.
+ *
+ * Return: 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_carveout(struct rproc *rproc,
void *ptr, int offset, int avail)
@@ -1006,6 +1015,8 @@ EXPORT_SYMBOL(rproc_add_carveout);
*
* This function allocates a rproc_mem_entry struct and fill it with parameters
* provided by client.
+ *
+ * Return: a valid pointer on success, or NULL on failure
*/
__printf(8, 9)
struct rproc_mem_entry *
@@ -1050,6 +1061,8 @@ EXPORT_SYMBOL(rproc_mem_entry_init);
*
* This function allocates a rproc_mem_entry struct and fill it with parameters
* provided by client.
+ *
+ * Return: a valid pointer on success, or NULL on failure
*/
__printf(5, 6)
struct rproc_mem_entry *
@@ -1881,6 +1894,8 @@ static int __rproc_detach(struct rproc *rproc)
* remoteproc functional again.
*
* This function can sleep, so it cannot be called from atomic context.
+ *
+ * Return: 0 on success or a negative value upon failure
*/
int rproc_trigger_recovery(struct rproc *rproc)
{
@@ -1965,7 +1980,7 @@ static void rproc_crash_handler_work(struct work_struct *work)
* If the remote processor is already powered on, this function immediately
* returns (successfully).
*
- * Returns 0 on success, and an appropriate error value otherwise.
+ * Return: 0 on success, and an appropriate error value otherwise
*/
int rproc_boot(struct rproc *rproc)
{
@@ -2100,6 +2115,8 @@ EXPORT_SYMBOL(rproc_shutdown);
* no longer available. From there it should be possible to remove the
* platform driver and even power cycle the application processor (if the HW
* supports it) without needing to switch off the remote processor.
+ *
+ * Return: 0 on success, and an appropriate error value otherwise
*/
int rproc_detach(struct rproc *rproc)
{
@@ -2152,7 +2169,7 @@ EXPORT_SYMBOL(rproc_detach);
* This function increments the remote processor's refcount, so always
* use rproc_put() to decrement it back once rproc isn't needed anymore.
*
- * Returns the rproc handle on success, and NULL on failure.
+ * Return: rproc handle on success, and NULL on failure
*/
#ifdef CONFIG_OF
struct rproc *rproc_get_by_phandle(phandle phandle)
@@ -2302,8 +2319,6 @@ static int rproc_validate(struct rproc *rproc)
* This is called by the platform-specific rproc implementation, whenever
* a new remote processor device is probed.
*
- * Returns 0 on success and an appropriate error code otherwise.
- *
* Note: this function initiates an asynchronous firmware loading
* context, which will look for virtio devices supported by the rproc's
* firmware.
@@ -2311,35 +2326,39 @@ static int rproc_validate(struct rproc *rproc)
* If found, those virtio devices will be created and added, so as a result
* of registering this remote processor, additional virtio drivers might be
* probed.
+ *
+ * Return: 0 on success and an appropriate error code otherwise
*/
int rproc_add(struct rproc *rproc)
{
struct device *dev = &rproc->dev;
int ret;
- ret = device_add(dev);
+ ret = rproc_validate(rproc);
if (ret < 0)
return ret;
- ret = rproc_validate(rproc);
+ /* add char device for this remoteproc */
+ ret = rproc_char_device_add(rproc);
if (ret < 0)
return ret;
+ ret = device_add(dev);
+ if (ret < 0) {
+ put_device(dev);
+ goto rproc_remove_cdev;
+ }
+
dev_info(dev, "%s is available\n", rproc->name);
/* create debugfs entries */
rproc_create_debug_dir(rproc);
- /* add char device for this remoteproc */
- ret = rproc_char_device_add(rproc);
- if (ret < 0)
- return ret;
-
/* if rproc is marked always-on, request it to boot */
if (rproc->auto_boot) {
ret = rproc_trigger_auto_boot(rproc);
if (ret < 0)
- return ret;
+ goto rproc_remove_dev;
}
/* expose to rproc_get_by_phandle users */
@@ -2348,6 +2367,13 @@ int rproc_add(struct rproc *rproc)
mutex_unlock(&rproc_list_mutex);
return 0;
+
+rproc_remove_dev:
+ rproc_delete_debug_dir(rproc);
+ device_del(dev);
+rproc_remove_cdev:
+ rproc_char_device_remove(rproc);
+ return ret;
}
EXPORT_SYMBOL(rproc_add);
@@ -2364,7 +2390,7 @@ static void devm_rproc_remove(void *rproc)
* This function performs like rproc_add() but the registered rproc device will
* automatically be removed on driver detach.
*
- * Returns: 0 on success, negative errno on failure
+ * Return: 0 on success, negative errno on failure
*/
int devm_rproc_add(struct device *dev, struct rproc *rproc)
{
@@ -2472,10 +2498,10 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
* implementations should then call rproc_add() to complete
* the registration of the remote processor.
*
- * On success the new rproc is returned, and on failure, NULL.
- *
* Note: _never_ directly deallocate @rproc, even if it was not registered
* yet. Instead, when you need to unroll rproc_alloc(), use rproc_free().
+ *
+ * Return: new rproc pointer on success, and NULL on failure
*/
struct rproc *rproc_alloc(struct device *dev, const char *name,
const struct rproc_ops *ops,
@@ -2588,7 +2614,7 @@ EXPORT_SYMBOL(rproc_put);
* of the outstanding reference created by rproc_alloc. To decrement that
* one last refcount, one still needs to call rproc_free().
*
- * Returns 0 on success and -EINVAL if @rproc isn't valid.
+ * Return: 0 on success and -EINVAL if @rproc isn't valid
*/
int rproc_del(struct rproc *rproc)
{
@@ -2603,7 +2629,6 @@ int rproc_del(struct rproc *rproc)
mutex_unlock(&rproc->lock);
rproc_delete_debug_dir(rproc);
- rproc_char_device_remove(rproc);
/* the rproc is downref'ed as soon as it's removed from the klist */
mutex_lock(&rproc_list_mutex);
@@ -2614,6 +2639,7 @@ int rproc_del(struct rproc *rproc)
synchronize_rcu();
device_del(&rproc->dev);
+ rproc_char_device_remove(rproc);
return 0;
}
@@ -2635,7 +2661,7 @@ static void devm_rproc_free(struct device *dev, void *res)
* This function performs like rproc_alloc() but the acquired rproc device will
* automatically be released on driver detach.
*
- * Returns: new rproc instance, or NULL on failure
+ * Return: new rproc instance, or NULL on failure
*/
struct rproc *devm_rproc_alloc(struct device *dev, const char *name,
const struct rproc_ops *ops,
@@ -2687,7 +2713,7 @@ EXPORT_SYMBOL(rproc_remove_subdev);
* rproc_get_by_child() - acquire rproc handle of @dev's ancestor
* @dev: child device to find ancestor of
*
- * Returns the ancestor rproc instance, or NULL if not found.
+ * Return: the ancestor rproc instance, or NULL if not found
*/
struct rproc *rproc_get_by_child(struct device *dev)
{
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
index 11423588965a..469c52e62faf 100644
--- a/drivers/remoteproc/remoteproc_elf_loader.c
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -31,6 +31,8 @@
* @fw: the ELF firmware image
*
* Make sure this fw image is sane (ie a correct ELF32/ELF64 file).
+ *
+ * Return: 0 on success and -EINVAL upon any failure
*/
int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
{
@@ -117,11 +119,11 @@ EXPORT_SYMBOL(rproc_elf_sanity_check);
* @rproc: the remote processor handle
* @fw: the ELF firmware image
*
- * This function returns the entry point address of the ELF
- * image.
- *
* Note that the boot address is not a configurable property of all remote
* processors. Some will always boot at a specific hard-coded address.
+ *
+ * Return: entry point address of the ELF image
+ *
*/
u64 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
{
@@ -152,6 +154,8 @@ EXPORT_SYMBOL(rproc_elf_get_boot_addr);
* might be different: they might not have iommus, and would prefer to
* directly allocate memory for every segment/resource. This is not yet
* supported, though.
+ *
+ * Return: 0 on success and an appropriate error code otherwise
*/
int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
{
@@ -362,7 +366,7 @@ EXPORT_SYMBOL(rproc_elf_load_rsc_table);
* This function finds the location of the loaded resource table. Don't
* call this function if the table wasn't loaded yet - it's a bug if you do.
*
- * Returns the pointer to the resource table if it is found or NULL otherwise.
+ * Return: pointer to the resource table if it is found or NULL otherwise.
* If the table wasn't loaded yet the result is unspecified.
*/
struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 0cc617f76068..cf4d54e98e6a 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -45,7 +45,7 @@ static bool rproc_virtio_notify(struct virtqueue *vq)
* when the remote processor signals that a specific virtqueue has pending
* messages available.
*
- * Returns IRQ_NONE if no message was found in the @notifyid virtqueue,
+ * Return: IRQ_NONE if no message was found in the @notifyid virtqueue,
* and otherwise returns IRQ_HANDLED.
*/
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int notifyid)
@@ -325,7 +325,7 @@ static void rproc_virtio_dev_release(struct device *dev)
* This function registers a virtio device. This vdev's partent is
* the rproc device.
*
- * Returns 0 on success or an appropriate error value otherwise.
+ * Return: 0 on success or an appropriate error value otherwise
*/
int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
{
@@ -432,6 +432,8 @@ out:
* @data: must be null
*
* This function unregisters an existing virtio device.
+ *
+ * Return: 0
*/
int rproc_remove_virtio_dev(struct device *dev, void *data)
{
diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 7353f9e7e7af..b643efcf995a 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -474,14 +474,12 @@ static int stm32_rproc_attach(struct rproc *rproc)
static int stm32_rproc_detach(struct rproc *rproc)
{
struct stm32_rproc *ddata = rproc->priv;
- int err, dummy_data, idx;
+ int err, idx;
/* Inform the remote processor of the detach */
idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_DETACH);
if (idx >= 0 && ddata->mb[idx].chan) {
- /* A dummy data is sent to allow to block on transmit */
- err = mbox_send_message(ddata->mb[idx].chan,
- &dummy_data);
+ err = mbox_send_message(ddata->mb[idx].chan, "stop");
if (err < 0)
dev_warn(&rproc->dev, "warning: remote FW detach without ack\n");
}
@@ -493,15 +491,13 @@ static int stm32_rproc_detach(struct rproc *rproc)
static int stm32_rproc_stop(struct rproc *rproc)
{
struct stm32_rproc *ddata = rproc->priv;
- int err, dummy_data, idx;
+ int err, idx;
/* request shutdown of the remote processor */
if (rproc->state != RPROC_OFFLINE) {
idx = stm32_rproc_mbox_idx(rproc, STM32_MBX_SHUTDOWN);
if (idx >= 0 && ddata->mb[idx].chan) {
- /* a dummy data is sent to allow to block on transmit */
- err = mbox_send_message(ddata->mb[idx].chan,
- &dummy_data);
+ err = mbox_send_message(ddata->mb[idx].chan, "detach");
if (err < 0)
dev_warn(&rproc->dev, "warning: remote FW shutdown without ack\n");
}
@@ -556,7 +552,7 @@ static void stm32_rproc_kick(struct rproc *rproc, int vqid)
continue;
if (!ddata->mb[i].chan)
return;
- err = mbox_send_message(ddata->mb[i].chan, (void *)(long)vqid);
+ err = mbox_send_message(ddata->mb[i].chan, "kick");
if (err < 0)
dev_err(&rproc->dev, "%s: failed (%s, err:%d)\n",
__func__, ddata->mb[i].name, err);
@@ -580,7 +576,7 @@ static int stm32_rproc_da_to_pa(struct rproc *rproc,
continue;
*pa = da - p_mem->dev_addr + p_mem->bus_addr;
- dev_dbg(dev, "da %llx to pa %#x\n", da, *pa);
+ dev_dbg(dev, "da %llx to pa %pap\n", da, pa);
return 0;
}
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 5cf8d030a1f0..71615210df3e 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -40,6 +40,8 @@
#define PROC_BOOT_CFG_FLAG_R5_ATCM_EN 0x00002000
/* Available from J7200 SoCs onwards */
#define PROC_BOOT_CFG_FLAG_R5_MEM_INIT_DIS 0x00004000
+/* Applicable to only AM64x SoCs */
+#define PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE 0x00008000
/* R5 TI-SCI Processor Control Flags */
#define PROC_BOOT_CTRL_FLAG_R5_CORE_HALT 0x00000001
@@ -49,6 +51,8 @@
#define PROC_BOOT_STATUS_FLAG_R5_WFI 0x00000002
#define PROC_BOOT_STATUS_FLAG_R5_CLK_GATED 0x00000004
#define PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED 0x00000100
+/* Applicable to only AM64x SoCs */
+#define PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY 0x00000200
/**
* struct k3_r5_mem - internal memory structure
@@ -64,19 +68,29 @@ struct k3_r5_mem {
size_t size;
};
+/*
+ * 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
+ */
enum cluster_mode {
CLUSTER_MODE_SPLIT = 0,
CLUSTER_MODE_LOCKSTEP,
+ CLUSTER_MODE_SINGLECPU,
};
/**
* struct k3_r5_soc_data - match data to handle SoC variations
* @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
*/
struct k3_r5_soc_data {
bool tcm_is_double;
bool tcm_ecc_autoinit;
+ bool single_cpu_mode;
};
/**
@@ -369,6 +383,13 @@ static inline int k3_r5_core_run(struct k3_r5_core *core)
* applicable cores to allow loading into the TCMs. The .prepare() ops is
* invoked by remoteproc core before any firmware loading, and is followed
* by the .start() ops after loading to actually let the R5 cores run.
+ *
+ * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to
+ * execute code, but combines the TCMs from both cores. The resets for both
+ * cores need to be released to make this possible, as the TCMs are in general
+ * private to each core. Only Core0 needs to be unhalted for running the
+ * cluster in this mode. The function uses the same reset logic as LockStep
+ * mode for this (though the behavior is agnostic of the reset release order).
*/
static int k3_r5_rproc_prepare(struct rproc *rproc)
{
@@ -386,7 +407,9 @@ static int k3_r5_rproc_prepare(struct rproc *rproc)
return ret;
mem_init_dis = !!(cfg & PROC_BOOT_CFG_FLAG_R5_MEM_INIT_DIS);
- ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP) ?
+ /* Re-use LockStep-mode reset logic for Single-CPU mode */
+ ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU) ?
k3_r5_lockstep_release(cluster) : k3_r5_split_release(core);
if (ret) {
dev_err(dev, "unable to enable cores for TCM loading, ret = %d\n",
@@ -427,6 +450,12 @@ static int k3_r5_rproc_prepare(struct rproc *rproc)
* cores. The cores themselves are only halted in the .stop() ops, and the
* .unprepare() ops is invoked by the remoteproc core after the remoteproc is
* stopped.
+ *
+ * The Single-CPU mode on applicable SoCs (eg: AM64x) combines the TCMs from
+ * both cores. The access is made possible only with releasing the resets for
+ * both cores, but with only Core0 unhalted. This function re-uses the same
+ * reset assert logic as LockStep mode for this mode (though the behavior is
+ * agnostic of the reset assert order).
*/
static int k3_r5_rproc_unprepare(struct rproc *rproc)
{
@@ -436,7 +465,9 @@ static int k3_r5_rproc_unprepare(struct rproc *rproc)
struct device *dev = kproc->dev;
int ret;
- ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP) ?
+ /* Re-use LockStep-mode reset logic for Single-CPU mode */
+ ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU) ?
k3_r5_lockstep_reset(cluster) : k3_r5_split_reset(core);
if (ret)
dev_err(dev, "unable to disable cores, ret = %d\n", ret);
@@ -455,6 +486,10 @@ static int k3_r5_rproc_unprepare(struct rproc *rproc)
* first followed by Core0. The Split-mode requires that Core0 to be maintained
* always in a higher power state that Core1 (implying Core1 needs to be started
* always only after Core0 is started).
+ *
+ * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to execute
+ * code, so only Core0 needs to be unhalted. The function uses the same logic
+ * flow as Split-mode for this.
*/
static int k3_r5_rproc_start(struct rproc *rproc)
{
@@ -539,6 +574,10 @@ put_mbox:
* Core0 to be maintained always in a higher power state that Core1 (implying
* Core1 needs to be stopped first before Core0).
*
+ * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to execute
+ * code, so only Core0 needs to be halted. The function uses the same logic
+ * flow as Split-mode for this.
+ *
* Note that the R5F halt operation in general is not effective when the R5F
* core is running, but is needed to make sure the core won't run after
* deasserting the reset the subsequent time. The asserting of reset can
@@ -665,7 +704,9 @@ static const struct rproc_ops k3_r5_rproc_ops = {
*
* Each R5FSS has a cluster-level setting for configuring the processor
* subsystem either in a safety/fault-tolerant LockStep mode or a performance
- * oriented Split mode. Each R5F core has a number of settings to either
+ * oriented Split mode on most SoCs. A fewer SoCs support a non-safety mode
+ * as an alternate for LockStep mode that exercises only a single R5F core
+ * called Single-CPU mode. Each R5F core has a number of settings to either
* enable/disable each of the TCMs, control which TCM appears at the R5F core's
* address 0x0. These settings need to be configured before the resets for the
* corresponding core are released. These settings are all protected and managed
@@ -677,11 +718,13 @@ static const struct rproc_ops k3_r5_rproc_ops = {
* the cores are halted before the .prepare() step.
*
* The function is called from k3_r5_cluster_rproc_init() and is invoked either
- * once (in LockStep mode) or twice (in Split mode). Support for LockStep-mode
- * is dictated by an eFUSE register bit, and the config settings retrieved from
- * DT are adjusted accordingly as per the permitted cluster mode. All cluster
- * level settings like Cluster mode and TEINIT (exception handling state
- * dictating ARM or Thumb mode) can only be set and retrieved using Core0.
+ * once (in LockStep mode or Single-CPU modes) or twice (in Split mode). Support
+ * for LockStep-mode is dictated by an eFUSE register bit, and the config
+ * settings retrieved from DT are adjusted accordingly as per the permitted
+ * cluster mode. Another eFUSE register bit dictates if the R5F cluster only
+ * supports a Single-CPU mode. All cluster level settings like Cluster mode and
+ * TEINIT (exception handling state dictating ARM or Thumb mode) can only be set
+ * and retrieved using Core0.
*
* The function behavior is different based on the cluster mode. The R5F cores
* are configured independently as per their individual settings in Split mode.
@@ -700,10 +743,16 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
u32 set_cfg = 0, clr_cfg = 0;
u64 boot_vec = 0;
bool lockstep_en;
+ bool single_cpu;
int ret;
core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem);
- core = (cluster->mode == CLUSTER_MODE_LOCKSTEP) ? core0 : kproc->core;
+ if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU) {
+ core = core0;
+ } else {
+ core = kproc->core;
+ }
ret = ti_sci_proc_get_status(core->tsp, &boot_vec, &cfg, &ctrl,
&stat);
@@ -713,23 +762,48 @@ static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc)
dev_dbg(dev, "boot_vector = 0x%llx, cfg = 0x%x ctrl = 0x%x stat = 0x%x\n",
boot_vec, cfg, ctrl, stat);
+ /* check if only Single-CPU mode is supported on applicable SoCs */
+ if (cluster->soc_data->single_cpu_mode) {
+ single_cpu =
+ !!(stat & PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY);
+ if (single_cpu && cluster->mode == CLUSTER_MODE_SPLIT) {
+ dev_err(cluster->dev, "split-mode not permitted, force configuring for single-cpu mode\n");
+ cluster->mode = CLUSTER_MODE_SINGLECPU;
+ }
+ goto config;
+ }
+
+ /* check conventional LockStep vs Split mode configuration */
lockstep_en = !!(stat & PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED);
if (!lockstep_en && cluster->mode == CLUSTER_MODE_LOCKSTEP) {
dev_err(cluster->dev, "lockstep mode not permitted, force configuring for split-mode\n");
cluster->mode = CLUSTER_MODE_SPLIT;
}
+config:
/* always enable ARM mode and set boot vector to 0 */
boot_vec = 0x0;
if (core == core0) {
clr_cfg = PROC_BOOT_CFG_FLAG_R5_TEINIT;
- /*
- * LockStep configuration bit is Read-only on Split-mode _only_
- * devices and system firmware will NACK any requests with the
- * bit configured, so program it only on permitted devices
- */
- if (lockstep_en)
- clr_cfg |= PROC_BOOT_CFG_FLAG_R5_LOCKSTEP;
+ 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
+ */
+ if (cluster->mode == CLUSTER_MODE_SINGLECPU)
+ set_cfg = PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE;
+ } else {
+ /*
+ * LockStep configuration bit is Read-only on Split-mode
+ * _only_ devices and system firmware will NACK any
+ * requests with the bit configured, so program it only
+ * on permitted devices
+ */
+ if (lockstep_en)
+ clr_cfg |= PROC_BOOT_CFG_FLAG_R5_LOCKSTEP;
+ }
}
if (core->atcm_enable)
@@ -894,12 +968,12 @@ static void k3_r5_reserved_mem_exit(struct k3_r5_rproc *kproc)
* cores are usable in Split-mode, but only the Core0 TCMs can be used in
* LockStep-mode. The newer revisions of the R5FSS IP maximizes these TCMs by
* leveraging the Core1 TCMs as well in certain modes where they would have
- * otherwise been unusable (Eg: LockStep-mode on J7200 SoCs). This is done by
- * making a Core1 TCM visible immediately after the corresponding Core0 TCM.
- * The SoC memory map uses the larger 64 KB sizes for the Core0 TCMs, and the
- * dts representation reflects this increased size on supported SoCs. The Core0
- * TCM sizes therefore have to be adjusted to only half the original size in
- * Split mode.
+ * otherwise been unusable (Eg: LockStep-mode on J7200 SoCs, Single-CPU mode on
+ * AM64x SoCs). This is done by making a Core1 TCM visible immediately after the
+ * corresponding Core0 TCM. The SoC memory map uses the larger 64 KB sizes for
+ * the Core0 TCMs, and the dts representation reflects this increased size on
+ * supported SoCs. The Core0 TCM sizes therefore have to be adjusted to only
+ * half the original size in Split mode.
*/
static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
{
@@ -909,6 +983,7 @@ static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc)
struct k3_r5_core *core0;
if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU ||
!cluster->soc_data->tcm_is_double)
return;
@@ -987,8 +1062,9 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
goto err_add;
}
- /* create only one rproc in lockstep mode */
- if (cluster->mode == CLUSTER_MODE_LOCKSTEP)
+ /* create only one rproc in lockstep mode or single-cpu mode */
+ if (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU)
break;
}
@@ -1020,11 +1096,12 @@ static void k3_r5_cluster_rproc_exit(void *data)
struct rproc *rproc;
/*
- * lockstep mode has only one rproc associated with first core, whereas
- * split-mode has two rprocs associated with each core, and requires
- * that core1 be powered down first
+ * lockstep mode and single-cpu modes have only one rproc associated
+ * with first core, whereas split-mode has two rprocs associated with
+ * each core, and requires that core1 be powered down first
*/
- core = (cluster->mode == CLUSTER_MODE_LOCKSTEP) ?
+ core = (cluster->mode == CLUSTER_MODE_LOCKSTEP ||
+ cluster->mode == CLUSTER_MODE_SINGLECPU) ?
list_first_entry(&cluster->cores, struct k3_r5_core, elem) :
list_last_entry(&cluster->cores, struct k3_r5_core, elem);
@@ -1272,9 +1349,9 @@ static int k3_r5_core_of_init(struct platform_device *pdev)
core->tsp = k3_r5_core_of_get_tsp(dev, core->ti_sci);
if (IS_ERR(core->tsp)) {
+ ret = PTR_ERR(core->tsp);
dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n",
ret);
- ret = PTR_ERR(core->tsp);
goto err;
}
@@ -1396,7 +1473,12 @@ static int k3_r5_probe(struct platform_device *pdev)
return -ENOMEM;
cluster->dev = dev;
- cluster->mode = CLUSTER_MODE_LOCKSTEP;
+ /*
+ * default to most common efuse configurations - Split-mode on AM64x
+ * and LockStep-mode on all others
+ */
+ cluster->mode = data->single_cpu_mode ?
+ CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP;
cluster->soc_data = data;
INIT_LIST_HEAD(&cluster->cores);
@@ -1450,17 +1532,26 @@ static int k3_r5_probe(struct platform_device *pdev)
static const struct k3_r5_soc_data am65_j721e_soc_data = {
.tcm_is_double = false,
.tcm_ecc_autoinit = false,
+ .single_cpu_mode = false,
};
static const struct k3_r5_soc_data j7200_soc_data = {
.tcm_is_double = true,
.tcm_ecc_autoinit = true,
+ .single_cpu_mode = false,
+};
+
+static const struct k3_r5_soc_data am64_soc_data = {
+ .tcm_is_double = true,
+ .tcm_ecc_autoinit = true,
+ .single_cpu_mode = true,
};
static const struct of_device_id k3_r5_of_match[] = {
{ .compatible = "ti,am654-r5fss", .data = &am65_j721e_soc_data, },
{ .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, },
{ .compatible = "ti,j7200-r5fss", .data = &j7200_soc_data, },
+ { .compatible = "ti,am64-r5fss", .data = &am64_soc_data, },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, k3_r5_of_match);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 02:23:20 +0000