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Message-ID: <20240412183708.4036007-5-tanmay.shah@amd.com>
Date: Fri, 12 Apr 2024 11:37:08 -0700
From: Tanmay Shah <tanmay.shah@....com>
To: <andersson@...nel.org>, <mathieu.poirier@...aro.org>, <robh@...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 v15 4/4] remoteproc: zynqmp: parse TCM from device tree
ZynqMP TCM information was 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 v15:
- Use hardcode TCM addresses as fallback method if "reg" unavailable
- Remove Versal and Versal-net support
Changes in v14:
- Add Versal platform support
- Add Versal-NET platform support
- Maintain backward compatibility for ZynqMP platform and use hardcode
TCM addresses
- Configure TCM based on xlnx,tcm-mode property for Versal
- Avoid TCM configuration if that property isn't available in dt
drivers/remoteproc/xlnx_r5_remoteproc.c | 127 ++++++++++++++++++++++--
1 file changed, 120 insertions(+), 7 deletions(-)
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index 0f942440b4e2..7b1c12108bff 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -74,8 +74,8 @@ 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 */
@@ -761,6 +761,103 @@ 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)
+{
+ int i, j, tcm_bank_count, ret, tcm_pd_idx, pd_count;
+ struct of_phandle_args out_args;
+ struct zynqmp_r5_core *r5_core;
+ 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 = r5_core->np;
+
+ pd_count = of_count_phandle_with_args(np, "power-domains",
+ "#power-domain-cells");
+
+ if (pd_count <= 0) {
+ dev_err(dev, "invalid power-domains property, %d\n", pd_count);
+ return -EINVAL;
+ }
+
+ /* First entry in power-domains list is for r5 core, rest for TCM. */
+ tcm_bank_count = pd_count - 1;
+
+ if (tcm_bank_count <= 0) {
+ dev_err(dev, "invalid TCM count %d\n", tcm_bank_count);
+ return -EINVAL;
+ }
+
+ r5_core->tcm_banks = devm_kcalloc(dev, tcm_bank_count,
+ sizeof(struct mem_bank_data *),
+ GFP_KERNEL);
+ if (!r5_core->tcm_banks)
+ return -ENOMEM;
+
+ r5_core->tcm_bank_count = tcm_bank_count;
+ for (j = 0, tcm_pd_idx = 1; j < tcm_bank_count; j++, tcm_pd_idx++) {
+ tcm = devm_kzalloc(dev, sizeof(struct mem_bank_data),
+ GFP_KERNEL);
+ if (!tcm)
+ return -ENOMEM;
+
+ r5_core->tcm_banks[j] = tcm;
+
+ /* Get power-domains id of TCM. */
+ ret = of_parse_phandle_with_args(np, "power-domains",
+ "#power-domain-cells",
+ tcm_pd_idx, &out_args);
+ if (ret) {
+ dev_err(r5_core->dev,
+ "failed to get tcm %d pm domain, ret %d\n",
+ tcm_pd_idx, ret);
+ return ret;
+ }
+ tcm->pm_domain_id = out_args.args[0];
+ of_node_put(out_args.np);
+
+ /* 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
@@ -839,9 +936,16 @@ 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);
+ r5_core = cluster->r5_cores[0];
+
+ /* Maintain backward compatibility for zynqmp by using hardcode TCM address. */
+ if (of_find_property(r5_core->np, "reg", NULL))
+ ret = zynqmp_r5_get_tcm_node_from_dt(cluster);
+ else
+ ret = zynqmp_r5_get_tcm_node(cluster);
+
+ if (ret) {
+ dev_err(dev, "can't get tcm, err %d\n", ret);
return ret;
}
@@ -906,16 +1010,25 @@ static int zynqmp_r5_cluster_init(struct zynqmp_r5_cluster *cluster)
* fail driver probe if either of that is not set in dts.
*/
if (cluster_mode == LOCKSTEP_MODE) {
- tcm_mode = PM_RPU_TCM_COMB;
fw_reg_val = PM_RPU_MODE_LOCKSTEP;
} else if (cluster_mode == SPLIT_MODE) {
- tcm_mode = PM_RPU_TCM_SPLIT;
fw_reg_val = PM_RPU_MODE_SPLIT;
} else {
dev_err(dev, "driver does not support cluster mode %d\n", cluster_mode);
return -EINVAL;
}
+ if (of_find_property(dev_node, "xlnx,tcm-mode", NULL)) {
+ ret = of_property_read_u32(dev_node, "xlnx,tcm-mode", (u32 *)&tcm_mode);
+ if (ret)
+ return ret;
+ } else {
+ if (cluster_mode == LOCKSTEP_MODE)
+ tcm_mode = PM_RPU_TCM_COMB;
+ else
+ tcm_mode = PM_RPU_TCM_SPLIT;
+ }
+
/*
* Number of cores is decided by number of child nodes of
* r5f subsystem node in dts. If Split mode is used in dts
--
2.25.1
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