hwconfig = kzalloc(size, GFP_KERNEL); if (!hwconfig) {
drm_printf(p, "Error: could not allocate hwconfig memory\n"); return;
}
xe_guc_hwconfig_copy(guc, hwconfig);
/* An entry requires at least three dwords for key, length, value */ while (i + 3 <= num_dw) {
u32 attribute = hwconfig[i++];
u32 len_dw = hwconfig[i++];
if (i + len_dw > num_dw) {
drm_printf(p, "Error: Attribute %u is %u dwords, but only %llu remain\n",
attribute, len_dw, num_dw - i);
len_dw = num_dw - i;
}
/* * If it's a single dword (as most hwconfig attributes are), * then it's probably a number that makes sense to display * in decimal form. In the rare cases where it's more than * one dword, just print it in hex form and let the user * figure out how to interpret it.
*/ if (len_dw == 1)
drm_printf(p, "[%2u] = %u\n", attribute, hwconfig[i]); else
drm_printf(p, "[%2u] = { %*ph }\n", attribute,
(int)(len_dw * sizeof(u32)), &hwconfig[i]);
i += len_dw;
}
if (i < num_dw || extra_bytes)
drm_printf(p, "Error: %llu extra bytes at end of hwconfig\n",
(num_dw - i) * sizeof(u32) + extra_bytes);
kfree(hwconfig);
}
/* * Lookup a specific 32-bit attribute value in the GuC's hwconfig table.
*/ int xe_guc_hwconfig_lookup_u32(struct xe_guc *guc, u32 attribute, u32 *val)
{
size_t size = xe_guc_hwconfig_size(guc);
u64 num_dw = div_u64(size, sizeof(u32));
u32 *hwconfig; bool found = false; int i = 0;
if (num_dw == 0) return -EINVAL;
hwconfig = kzalloc(size, GFP_KERNEL); if (!hwconfig) return -ENOMEM;
xe_guc_hwconfig_copy(guc, hwconfig);
/* An entry requires at least three dwords for key, length, value */ while (i + 3 <= num_dw) {
u32 key = hwconfig[i++];
u32 len_dw = hwconfig[i++];
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