On 4/17/24 23:53, Timur Tabi wrote:
<snip>
+
+/**
+ * r535_gsp_rpc_set_registry - build registry RPC and call GSP-RM
+ * @gsp: gsp pointer
+ *
+ * The GSP-RM registry is a set of key/value pairs that configure some aspects
+ * of GSP-RM. The keys are strings, and the values are 32-bit integers.
+ *
+ * The registry is built from a combination of a static hard-coded list (see
+ * above) and entries passed on the driver's command line.
+ */
static int
r535_gsp_rpc_set_registry(struct nvkm_gsp *gsp)
{
PACKED_REGISTRY_TABLE *rpc;
- char *strings;
- int str_offset;
- int i;
- size_t rpc_size = struct_size(rpc, entries, NV_GSP_REG_NUM_ENTRIES);
+ unsigned int i;
+ int ret;
- /* add strings + null terminator */
- for (i = 0; i < NV_GSP_REG_NUM_ENTRIES; i++)
- rpc_size += strlen(r535_registry_entries[i].name) + 1;
+ INIT_LIST_HEAD(&gsp->registry_list);
+ gsp->registry_rpc_size = sizeof(PACKED_REGISTRY_TABLE);
- rpc = nvkm_gsp_rpc_get(gsp, NV_VGPU_MSG_FUNCTION_SET_REGISTRY, rpc_size);
- if (IS_ERR(rpc))
- return PTR_ERR(rpc);
+ for (i = 0; i < NV_GSP_REG_NUM_ENTRIES; i++) {
+ ret = add_registry_num(gsp, r535_registry_entries[i].name,
+ r535_registry_entries[i].value);
+ if (ret) {
+ clean_registry(gsp);
+ return ret;
+ }
+ }
- rpc->numEntries = NV_GSP_REG_NUM_ENTRIES;
+ /*
+ * The NVreg_RegistryDwords parameter is a string of key=value
+ * pairs separated by semicolons. We need to extract and trim each
+ * substring, and then parse the substring to extract the key and
+ * value.
+ */
+ if (NVreg_RegistryDwords) {
+ char *p = kstrdup(NVreg_RegistryDwords, GFP_KERNEL);
+ char *start, *next = p, *equal;
+ size_t length;
+
+ /* Remove any whitespace from the parameter string */
+ length = strip(p, " \t\n");
With that, I see the following warning compiling this patch.
warning: variable ‘length’ set but not used [-Wunused-but-set-variable]
Did you intend to use the length for anything?
Also, looking at the warning made me aware of 'p' potentially being NULL.
If you agree, I can fix the warning and add the corresponding NULL check when
applying the patch.
- Danilo
+
+ while ((start = strsep(&next, ";"))) {
+ long value;
+
+ equal = strchr(start, '=');
+ if (!equal || equal == start || equal[1] == 0) {
+ nvkm_error(&gsp->subdev,
+ "ignoring invalid registry string '%s'\n",
+ start);
+ continue;
+ }
- str_offset = offsetof(typeof(*rpc), entries[NV_GSP_REG_NUM_ENTRIES]);
- strings = (char *)rpc + str_offset;
- for (i = 0; i < NV_GSP_REG_NUM_ENTRIES; i++) {
- int name_len = strlen(r535_registry_entries[i].name) + 1;
-
- rpc->entries[i].nameOffset = str_offset;
- rpc->entries[i].type = 1;
- rpc->entries[i].data = r535_registry_entries[i].value;
- rpc->entries[i].length = 4;
- memcpy(strings, r535_registry_entries[i].name, name_len);
- strings += name_len;
- str_offset += name_len;
+ /* Truncate the key=value string to just key */
+ *equal = 0;
+
+ ret = kstrtol(equal + 1, 0, &value);
+ if (!ret) {
+ ret = add_registry_num(gsp, start, value);
+ } else {
+ /* Not a number, so treat it as a string */
+ ret = add_registry_string(gsp, start, equal + 1);
+ }
+
+ if (ret) {
+ nvkm_error(&gsp->subdev,
+ "ignoring invalid registry key/value '%s=%s'\n",
+ start, equal + 1);
+ continue;
+ }
+ }
+
+ kfree(p);
}
- rpc->size = str_offset;
+
+ rpc = nvkm_gsp_rpc_get(gsp, NV_VGPU_MSG_FUNCTION_SET_REGISTRY, gsp->registry_rpc_size);
+ if (IS_ERR(rpc)) {
+ clean_registry(gsp);
+ return PTR_ERR(rpc);
+ }
+
+ build_registry(gsp, rpc);
return nvkm_gsp_rpc_wr(gsp, rpc, false);
}
base-commit: f7ad2ce5fd89ab5d146da8f486a310746df5dc9e
prerequisite-patch-id: 9bb653b6a53dcba4171d653e24a242461374f9fe
prerequisite-patch-id: 7093a9db84053e43f6f278bf1d159a25d14ceebf
