| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20231013042229.3954527-5-tanmay.shah@amd.com>
Date: Thu, 12 Oct 2023 21:22:29 -0700
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 v6 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 v6:
- Missing . at the end of the commit message
- remove redundant initialization of variables
- remove fail_tcm label and relevant code to free memory
acquired using devm_* API. As this will be freed when device free it
- add extra check to see if "reg" property is supported or not
drivers/remoteproc/xlnx_r5_remoteproc.c | 106 ++++++++++++++++++++++--
1 file changed, 98 insertions(+), 8 deletions(-)
diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index 04e95d880184..8c3575970c1d 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 */
@@ -613,7 +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;
}
@@ -626,7 +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;
}
@@ -940,6 +942,8 @@ static int zynqmp_r5_add_pm_domains(struct rproc *rproc)
}
}
+ return 0;
+
fail_add_pm_domains_lockstep:
while (j >= 1) {
if (r5_core->pm_dev_link2 && !IS_ERR_OR_NULL(r5_core->pm_dev_link2[j]))
@@ -1102,6 +1106,83 @@ 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
@@ -1180,10 +1261,19 @@ 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
Powered by blists - more mailing lists