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Message-ID: <20231117174238.1876655-5-tanmay.shah@amd.com>
Date: Fri, 17 Nov 2023 09:42:38 -0800
From: Tanmay Shah <tanmay.shah@....com>
To: <andersson@...nel.org>, <mathieu.poirier@...aro.org>,
<robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
<conor+dt@...nel.org>, <michal.simek@....com>,
<ben.levinsky@....com>, <tanmay.shah@....com>
CC: <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH v7 4/4] remoteproc: zynqmp: parse TCM from device tree
ZynqMP TCM information is fixed in driver. Now ZynqMP TCM information
is available in device-tree. Parse TCM information in driver
as per new bindings.
Signed-off-by: Tanmay Shah <tanmay.shah@....com>
---
Changes in v7:
- move checking of pm_domain_id from previous patch
- fix mem_bank_data memory allocation
drivers/remoteproc/xlnx_r5_remoteproc.c | 152 ++++++++++++++++++++----
1 file changed, 128 insertions(+), 24 deletions(-)
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index 22bccc5075a0..270af73344ef 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -75,8 +75,8 @@ struct mbox_info {
};
/*
- * Hardcoded TCM bank values. This will be removed once TCM bindings are
- * accepted for system-dt specifications and upstreamed in linux kernel
+ * Hardcoded TCM bank values. This will stay in driver to maintain backward
+ * compatibility with device-tree that does not have TCM information.
*/
static const struct mem_bank_data zynqmp_tcm_banks_split[] = {
{0xffe00000UL, 0x0, 0x10000UL, PD_R5_0_ATCM, "atcm0"}, /* TCM 64KB each */
@@ -587,12 +587,21 @@ static int add_tcm_carveout_split_mode(struct rproc *rproc)
bank_size = r5_core->tcm_banks[i]->size;
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
- ret = zynqmp_pm_request_node(pm_domain_id,
- ZYNQMP_PM_CAPABILITY_ACCESS, 0,
- ZYNQMP_PM_REQUEST_ACK_BLOCKING);
- if (ret < 0) {
- dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
- goto release_tcm_split;
+ /*
+ * If TCM information is available in device-tree then
+ * in that case, pm domain framework will power on/off TCM.
+ * In that case pm_domain_id is set to 0. If hardcode
+ * bindings from driver is used, then only this driver will
+ * use pm_domain_id.
+ */
+ if (pm_domain_id) {
+ ret = zynqmp_pm_request_node(pm_domain_id,
+ ZYNQMP_PM_CAPABILITY_ACCESS, 0,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ if (ret < 0) {
+ dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
+ goto release_tcm_split;
+ }
}
dev_dbg(dev, "TCM carveout split mode %s addr=%llx, da=0x%x, size=0x%lx",
@@ -604,7 +613,8 @@ static int add_tcm_carveout_split_mode(struct rproc *rproc)
bank_name);
if (!rproc_mem) {
ret = -ENOMEM;
- zynqmp_pm_release_node(pm_domain_id);
+ if (pm_domain_id)
+ zynqmp_pm_release_node(pm_domain_id);
goto release_tcm_split;
}
@@ -617,7 +627,8 @@ static int add_tcm_carveout_split_mode(struct rproc *rproc)
/* If failed, Turn off all TCM banks turned on before */
for (i--; i >= 0; i--) {
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
- zynqmp_pm_release_node(pm_domain_id);
+ if (pm_domain_id)
+ zynqmp_pm_release_node(pm_domain_id);
}
return ret;
}
@@ -659,13 +670,16 @@ static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
/* Turn on each TCM bank individually */
- ret = zynqmp_pm_request_node(pm_domain_id,
- ZYNQMP_PM_CAPABILITY_ACCESS, 0,
- ZYNQMP_PM_REQUEST_ACK_BLOCKING);
- if (ret < 0) {
- dev_err(dev, "failed to turn on TCM 0x%x",
- pm_domain_id);
- goto release_tcm_lockstep;
+
+ if (pm_domain_id) {
+ ret = zynqmp_pm_request_node(pm_domain_id,
+ ZYNQMP_PM_CAPABILITY_ACCESS, 0,
+ ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+ if (ret < 0) {
+ dev_err(dev, "failed to turn on TCM 0x%x",
+ pm_domain_id);
+ goto release_tcm_lockstep;
+ }
}
bank_size = r5_core->tcm_banks[i]->size;
@@ -683,7 +697,8 @@ static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
bank_name);
if (!rproc_mem) {
ret = -ENOMEM;
- zynqmp_pm_release_node(pm_domain_id);
+ if (pm_domain_id)
+ zynqmp_pm_release_node(pm_domain_id);
goto release_tcm_lockstep;
}
@@ -700,7 +715,8 @@ static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
/* If failed, Turn off all TCM banks turned on before */
for (i--; i >= 0; i--) {
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
- zynqmp_pm_release_node(pm_domain_id);
+ if (pm_domain_id)
+ zynqmp_pm_release_node(pm_domain_id);
}
return ret;
}
@@ -931,6 +947,8 @@ static int zynqmp_r5_add_pm_domains(struct rproc *rproc)
}
}
+ return 0;
+
fail_add_pm_domains_lockstep:
while (--j >= 0) {
device_link_del(r5_core->pm_dev_core1_link[j]);
@@ -1012,7 +1030,7 @@ static int zynqmp_r5_rproc_unprepare(struct rproc *rproc)
for (i = 0; i < r5_core->tcm_bank_count; i++) {
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
- if (zynqmp_pm_release_node(pm_domain_id))
+ if (pm_domain_id && zynqmp_pm_release_node(pm_domain_id))
dev_warn(r5_core->dev,
"can't turn off TCM bank 0x%x", pm_domain_id);
}
@@ -1087,6 +1105,83 @@ static struct zynqmp_r5_core *zynqmp_r5_add_rproc_core(struct device *cdev)
return ERR_PTR(ret);
}
+static int zynqmp_r5_get_tcm_node_from_dt(struct zynqmp_r5_cluster *cluster)
+{
+ struct zynqmp_r5_core *r5_core;
+ int i, j, tcm_bank_count, ret;
+ struct platform_device *cpdev;
+ struct mem_bank_data *tcm;
+ struct device_node *np;
+ struct resource *res;
+ u64 abs_addr, size;
+ struct device *dev;
+
+ for (i = 0; i < cluster->core_count; i++) {
+ r5_core = cluster->r5_cores[i];
+ dev = r5_core->dev;
+ np = dev_of_node(dev);
+
+ /* we have address cell 2 and size cell as 2 */
+ ret = of_property_count_elems_of_size(np, "reg",
+ 4 * sizeof(u32));
+ if (ret <= 0) {
+ dev_err(dev, "can't get reg property err %d\n", ret);
+ return -EINVAL;
+ }
+
+ tcm_bank_count = ret;
+
+ r5_core->tcm_banks = devm_kcalloc(dev, tcm_bank_count,
+ sizeof(struct mem_bank_data *),
+ GFP_KERNEL);
+ if (!r5_core->tcm_banks)
+ ret = -ENOMEM;
+
+ r5_core->tcm_bank_count = tcm_bank_count;
+ for (j = 0; j < tcm_bank_count; j++) {
+ tcm = devm_kzalloc(dev, sizeof(struct mem_bank_data),
+ GFP_KERNEL);
+ if (!tcm)
+ return -ENOMEM;
+
+ r5_core->tcm_banks[j] = tcm;
+
+ /* get tcm address without translation */
+ ret = of_property_read_reg(np, j, &abs_addr, &size);
+ if (ret) {
+ dev_err(dev, "failed to get reg property\n");
+ return ret;
+ }
+
+ /*
+ * remote processor can address only 32 bits
+ * so convert 64-bits into 32-bits. This will discard
+ * any unwanted upper 32-bits.
+ */
+ tcm->da = (u32)abs_addr;
+ tcm->size = (u32)size;
+
+ cpdev = to_platform_device(dev);
+ res = platform_get_resource(cpdev, IORESOURCE_MEM, j);
+ if (!res) {
+ dev_err(dev, "failed to get tcm resource\n");
+ return -EINVAL;
+ }
+
+ tcm->addr = (u32)res->start;
+ tcm->bank_name = (char *)res->name;
+ res = devm_request_mem_region(dev, tcm->addr, tcm->size,
+ tcm->bank_name);
+ if (!res) {
+ dev_err(dev, "failed to request tcm resource\n");
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+}
+
/**
* zynqmp_r5_get_tcm_node()
* Ideally this function should parse tcm node and store information
@@ -1165,10 +1260,19 @@ static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
struct zynqmp_r5_core *r5_core;
int ret, i;
- ret = zynqmp_r5_get_tcm_node(cluster);
- if (ret < 0) {
- dev_err(dev, "can't get tcm node, err %d\n", ret);
- return ret;
+ r5_core = cluster->r5_cores[0];
+ if (of_find_property(r5_core->np, "reg", NULL)) {
+ ret = zynqmp_r5_get_tcm_node_from_dt(cluster);
+ if (ret) {
+ dev_err(dev, "can't get tcm node from dt, err %d\n", ret);
+ return ret;
+ }
+ } else {
+ ret = zynqmp_r5_get_tcm_node(cluster);
+ if (ret < 0) {
+ dev_err(dev, "can't get tcm node, err %d\n", ret);
+ return ret;
+ }
}
for (i = 0; i < cluster->core_count; i++) {
--
2.25.1
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