[PATCH V3 XRT Alveo 02/18] fpga: xrt: driver metadata helper functions

Lizhi Hou
2021-02-18T06:59:42Z

XRT drivers use device tree as metadata format to discover HW subsystems
behind PCIe BAR. Thus libfdt functions are called for driver to parse
device tree blob.

Signed-off-by: Sonal Santan <sonal.santan@xilinx.com>
Signed-off-by: Max Zhen <max.zhen@xilinx.com>
Signed-off-by: Lizhi Hou <lizhih@xilinx.com>
---
drivers/fpga/xrt/include/metadata.h | 229 ++++++++++++
drivers/fpga/xrt/metadata/metadata.c | 524 +++++++++++++++++++++++++++
2 files changed, 753 insertions(+)
create mode 100644 drivers/fpga/xrt/include/metadata.h
create mode 100644 drivers/fpga/xrt/metadata/metadata.c

diff --git a/drivers/fpga/xrt/include/metadata.h b/drivers/fpga/xrt/include/metadata.h
new file mode 100644
index 000000000000..b929bc469b73
--- /dev/null
+++ b/drivers/fpga/xrt/include/metadata.h
@@ -0,0 +1,229 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Header file for Xilinx Runtime (XRT) driver
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * Authors:
+ * Lizhi Hou <Lizhi.Hou@xilinx.com>
+ */
+
+#ifndef _XRT_METADATA_H
+#define _XRT_METADATA_H
+
+#include <linux/device.h>
+#include <linux/vmalloc.h>
+#include <linux/uuid.h>
+
+#define XRT_MD_INVALID_LENGTH (~0UL)
+
+#define XRT_MD_PROP_COMPATIBLE "compatible"
+#define XRT_MD_PROP_PF_NUM "pcie_physical_function"
+#define XRT_MD_PROP_BAR_IDX "pcie_bar_mapping"
+#define XRT_MD_PROP_IO_OFFSET "reg"
+#define XRT_MD_PROP_INTERRUPTS "interrupts"
+#define XRT_MD_PROP_INTERFACE_UUID "interface_uuid"
+#define XRT_MD_PROP_LOGIC_UUID "logic_uuid"
+#define XRT_MD_PROP_VERSION_MAJOR "firmware_version_major"
+
+#define XRT_MD_PROP_HWICAP "axi_hwicap"
+#define XRT_MD_PROP_PDI_CONFIG "pdi_config_mem"
+
+#define XRT_MD_NODE_ENDPOINTS "addressable_endpoints"
+#define XRT_MD_INTERFACES_PATH "/interfaces"
+
+#define XRT_MD_NODE_FIRMWARE "firmware"
+#define XRT_MD_NODE_INTERFACES "interfaces"
+#define XRT_MD_NODE_PARTITION_INFO "partition_info"
+
+#define XRT_MD_NODE_FLASH "ep_card_flash_program_00"
+#define XRT_MD_NODE_XVC_PUB "ep_debug_bscan_user_00"
+#define XRT_MD_NODE_XVC_PRI "ep_debug_bscan_mgmt_00"
+#define XRT_MD_NODE_SYSMON "ep_cmp_sysmon_00"
+#define XRT_MD_NODE_AF_BLP_CTRL_MGMT "ep_firewall_blp_ctrl_mgmt_00"
+#define XRT_MD_NODE_AF_BLP_CTRL_USER "ep_firewall_blp_ctrl_user_00"
+#define XRT_MD_NODE_AF_CTRL_MGMT "ep_firewall_ctrl_mgmt_00"
+#define XRT_MD_NODE_AF_CTRL_USER "ep_firewall_ctrl_user_00"
+#define XRT_MD_NODE_AF_CTRL_DEBUG "ep_firewall_ctrl_debug_00"
+#define XRT_MD_NODE_AF_DATA_H2C "ep_firewall_data_h2c_00"
+#define XRT_MD_NODE_AF_DATA_C2H "ep_firewall_data_c2h_00"
+#define XRT_MD_NODE_AF_DATA_P2P "ep_firewall_data_p2p_00"
+#define XRT_MD_NODE_AF_DATA_M2M "ep_firewall_data_m2m_00"
+#define XRT_MD_NODE_CMC_REG "ep_cmc_regmap_00"
+#define XRT_MD_NODE_CMC_RESET "ep_cmc_reset_00"
+#define XRT_MD_NODE_CMC_MUTEX "ep_cmc_mutex_00"
+#define XRT_MD_NODE_CMC_FW_MEM "ep_cmc_firmware_mem_00"
+#define XRT_MD_NODE_ERT_FW_MEM "ep_ert_firmware_mem_00"
+#define XRT_MD_NODE_ERT_CQ_MGMT "ep_ert_command_queue_mgmt_00"
+#define XRT_MD_NODE_ERT_CQ_USER "ep_ert_command_queue_user_00"
+#define XRT_MD_NODE_MAILBOX_MGMT "ep_mailbox_mgmt_00"
+#define XRT_MD_NODE_MAILBOX_USER "ep_mailbox_user_00"
+#define XRT_MD_NODE_GATE_PLP "ep_pr_isolate_plp_00"
+#define XRT_MD_NODE_GATE_ULP "ep_pr_isolate_ulp_00"
+#define XRT_MD_NODE_PCIE_MON "ep_pcie_link_mon_00"
+#define XRT_MD_NODE_DDR_CALIB "ep_ddr_mem_calib_00"
+#define XRT_MD_NODE_CLK_KERNEL1 "ep_aclk_kernel_00"
+#define XRT_MD_NODE_CLK_KERNEL2 "ep_aclk_kernel_01"
+#define XRT_MD_NODE_CLK_KERNEL3 "ep_aclk_hbm_00"
+#define XRT_MD_NODE_KDMA_CTRL "ep_kdma_ctrl_00"
+#define XRT_MD_NODE_FPGA_CONFIG "ep_fpga_configuration_00"
+#define XRT_MD_NODE_ERT_SCHED "ep_ert_sched_00"
+#define XRT_MD_NODE_XDMA "ep_xdma_00"
+#define XRT_MD_NODE_MSIX "ep_msix_00"
+#define XRT_MD_NODE_QDMA "ep_qdma_00"
+#define XRT_MD_XRT_MD_NODE_QDMA4 "ep_qdma4_00"
+#define XRT_MD_NODE_STM "ep_stream_traffic_manager_00"
+#define XRT_MD_NODE_STM4 "ep_stream_traffic_manager4_00"
+#define XRT_MD_NODE_CLK_SHUTDOWN "ep_aclk_shutdown_00"
+#define XRT_MD_NODE_ERT_BASE "ep_ert_base_address_00"
+#define XRT_MD_NODE_ERT_RESET "ep_ert_reset_00"
+#define XRT_MD_NODE_CLKFREQ_K1 "ep_freq_cnt_aclk_kernel_00"
+#define XRT_MD_NODE_CLKFREQ_K2 "ep_freq_cnt_aclk_kernel_01"
+#define XRT_MD_NODE_CLKFREQ_HBM "ep_freq_cnt_aclk_hbm_00"
+#define XRT_MD_NODE_GAPPING "ep_gapping_demand_00"
+#define XRT_MD_NODE_UCS_CONTROL_STATUS "ep_ucs_control_status_00"
+#define XRT_MD_NODE_P2P "ep_p2p_00"
+#define XRT_MD_NODE_REMAP_P2P "ep_remap_p2p_00"
+#define XRT_MD_NODE_DDR4_RESET_GATE "ep_ddr_mem_srsr_gate_00"
+#define XRT_MD_NODE_ADDR_TRANSLATOR "ep_remap_data_c2h_00"
+#define XRT_MD_NODE_MAILBOX_XRT "ep_mailbox_user_to_ert_00"
+#define XRT_MD_NODE_PMC_INTR "ep_pmc_intr_00"
+#define XRT_MD_NODE_PMC_MUX "ep_pmc_mux_00"
+
+/* driver defined endpoints */
+#define XRT_MD_NODE_VSEC "drv_ep_vsec_00"
+#define XRT_MD_NODE_VSEC_GOLDEN "drv_ep_vsec_golden_00"
+#define XRT_MD_NODE_BLP_ROM "drv_ep_blp_rom_00"
+#define XRT_MD_NODE_MAILBOX_VSEC "ep_mailbox_vsec_00"
+#define XRT_MD_NODE_PLAT_INFO "drv_ep_platform_info_mgmt_00"
+#define XRT_MD_NODE_TEST "drv_ep_test_00"
+#define XRT_MD_NODE_MGMT_MAIN "drv_ep_mgmt_main_00"
+#define XRT_MD_NODE_FLASH_VSEC "drv_ep_card_flash_program_00"
+#define XRT_MD_NODE_GOLDEN_VER "drv_ep_golden_ver_00"
+#define XRT_MD_XRT_MD_NODE_PARTITION_INFO_BLP "partition_info_0"
+#define XRT_MD_XRT_MD_NODE_PARTITION_INFO_PLP "partition_info_1"
+
+#define XRT_MD_NODE_DDR_SRSR "drv_ep_ddr_srsr"
+#define XRT_MD_REGMAP_DDR_SRSR "drv_ddr_srsr"
+
+#define XRT_MD_PROP_OFFSET "drv_offset"
+#define XRT_MD_PROP_CLK_FREQ "drv_clock_frequency"
+#define XRT_MD_PROP_CLK_CNT "drv_clock_frequency_counter"
+#define XRT_MD_PROP_VBNV "vbnv"
+#define XRT_MD_PROP_VROM "vrom"
+#define XRT_MD_PROP_PARTITION_LEVEL "partition_level"
+
+struct xrt_md_endpoint {
+ const char *ep_name;
+ u32 bar;
+ long bar_off;
+ ulong size;
+ char *regmap;
+ char *regmap_ver;
+};
+
+/* Note: res_id is defined by leaf driver and must start with 0. */
+struct xrt_iores_map {
+ char *res_name;
+ int res_id;
+};
+
+static inline int xrt_md_res_name2id(const struct xrt_iores_map *res_map,
+ int entry_num, const char *res_name)
+{
+ int i;
+
+ for (i = 0; i < entry_num; i++) {
+ if (!strcmp(res_name, res_map->res_name))
+ return res_map->res_id;
+ res_map++;
+ }
+ return -1;
+}
+
+static inline const char *
+xrt_md_res_id2name(const struct xrt_iores_map *res_map, int entry_num, int id)
+{
+ int i;
+
+ for (i = 0; i < entry_num; i++) {
+ if (res_map->res_id == id)
+ return res_map->res_name;
+ res_map++;
+ }
+ return NULL;
+}
+
+unsigned long xrt_md_size(struct device *dev, const char *blob);
+int xrt_md_create(struct device *dev, char **blob);
+int xrt_md_add_endpoint(struct device *dev, char *blob,
+ struct xrt_md_endpoint *ep);
+int xrt_md_del_endpoint(struct device *dev, char *blob, const char *ep_name,
+ char *regmap_name);
+int xrt_md_get_prop(struct device *dev, const char *blob, const char *ep_name,
+ const char *regmap_name, const char *prop,
+ const void **val, int *size);
+int xrt_md_set_prop(struct device *dev, char *blob, const char *ep_name,
+ const char *regmap_name, const char *prop,
+ const void *val, int size);
+int xrt_md_copy_endpoint(struct device *dev, char *blob, const char *src_blob,
+ const char *ep_name, const char *regmap_name,
+ const char *new_ep_name);
+int xrt_md_get_next_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ char **next_ep, char **next_regmap);
+int xrt_md_get_compatible_endpoint(struct device *dev, const char *blob,
+ const char *regmap_name, const char **ep_name);
+int xrt_md_find_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ const char **epname);
+void xrt_md_pack(struct device *dev, char *blob);
+char *xrt_md_dup(struct device *dev, const char *blob);
+int xrt_md_get_intf_uuids(struct device *dev, const char *blob,
+ u32 *num_uuids, uuid_t *intf_uuids);
+static inline int xrt_md_copy_all_endpoints(struct device *dev, char *blob, const char *src_blob)
+{
+ return xrt_md_copy_endpoint(dev, blob, src_blob, XRT_MD_NODE_ENDPOINTS,
+ NULL, NULL);
+}
+
+/*
+ * Firmware provides 128 bit hash string as unque id of partition/interface.
+ * This string will be canonical textual representation in the future.
+ * Before that, introducing these two functions below to translate
+ * hash string to uuid_t for released hardware.
+ */
+static inline void xrt_md_trans_uuid2str(const uuid_t *uuid, char *uuidstr)
+{
+ int i, p;
+ u8 *u = (u8 *)uuid;
+
+ for (p = 0, i = sizeof(uuid_t) - 1; i >= 0; p++, i--)
+ (void)snprintf(&uuidstr[p * 2], 3, "%02x", u[i]);
+}
+
+static inline int xrt_md_trans_str2uuid(struct device *dev, const char *uuidstr, uuid_t *p_uuid)
+{
+ char *p;
+ const char *str;
+ char tmp[3] = { 0 };
+ int i, ret;
+
+ memset(p_uuid, 0, sizeof(*p_uuid));
+ p = (char *)p_uuid;
+ str = uuidstr + strlen(uuidstr) - 2;
+
+ for (i = 0; i < sizeof(*p_uuid) && str >= uuidstr; i++) {
+ tmp[0] = *str;
+ tmp[1] = *(str + 1);
+ ret = kstrtou8(tmp, 16, p);
+ if (ret)
+ return -EINVAL;
+ p++;
+ str -= 2;
+ }
+
+ return 0;
+}
+
+#endif
diff --git a/drivers/fpga/xrt/metadata/metadata.c b/drivers/fpga/xrt/metadata/metadata.c
new file mode 100644
index 000000000000..5d106396f438
--- /dev/null
+++ b/drivers/fpga/xrt/metadata/metadata.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Alveo FPGA Metadata parse APIs
+ *
+ * Copyright (C) 2020-2021 Xilinx, Inc.
+ *
+ * Authors:
+ * Lizhi Hou <Lizhi.Hou@xilinx.com>
+ */
+
+#include <linux/libfdt_env.h>
+#include "libfdt.h"
+#include "metadata.h"
+
+#define MAX_BLOB_SIZE (4096 * 25)
+
+static int xrt_md_setprop(struct device *dev, char *blob, int offset,
+ const char *prop, const void *val, int size);
+static int xrt_md_overlay(struct device *dev, char *blob, int target,
+ const char *overlay_blob, int overlay_offset);
+static int xrt_md_get_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ int *ep_offset);
+
+unsigned long xrt_md_size(struct device *dev, const char *blob)
+{
+ unsigned long len = (long)fdt_totalsize(blob);
+
+ len = (len > MAX_BLOB_SIZE) ? XRT_MD_INVALID_LENGTH : len;
+ return len;
+}
+EXPORT_SYMBOL_GPL(xrt_md_size);
+
+int xrt_md_create(struct device *dev, char **blob)
+{
+ int ret = 0;
+
+ WARN_ON(!blob);
+
+ *blob = vmalloc(MAX_BLOB_SIZE);
+ if (!*blob)
+ return -ENOMEM;
+
+ ret = fdt_create_empty_tree(*blob, MAX_BLOB_SIZE);
+ if (ret) {
+ dev_err(dev, "format blob failed, ret = %d", ret);
+ goto failed;
+ }
+
+ ret = fdt_next_node(*blob, -1, NULL);
+ if (ret < 0) {
+ dev_err(dev, "No Node, ret = %d", ret);
+ goto failed;
+ }
+
+ ret = fdt_add_subnode(*blob, ret, XRT_MD_NODE_ENDPOINTS);
+ if (ret < 0) {
+ dev_err(dev, "add node failed, ret = %d", ret);
+ goto failed;
+ }
+
+ return 0;
+
+failed:
+ vfree(*blob);
+ *blob = NULL;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(xrt_md_create);
+
+static int xrt_md_add_node(struct device *dev, char *blob, int parent_offset,
+ const char *ep_name)
+{
+ int ret;
+
+ ret = fdt_add_subnode(blob, parent_offset, ep_name);
+ if (ret < 0 && ret != -FDT_ERR_EXISTS)
+ dev_err(dev, "failed to add node %s. %d", ep_name, ret);
+
+ return ret;
+}
+
+int xrt_md_del_endpoint(struct device *dev, char *blob, const char *ep_name,
+ char *regmap_name)
+{
+ int ret;
+ int ep_offset;
+
+ ret = xrt_md_get_endpoint(dev, blob, ep_name, regmap_name, &ep_offset);
+ if (ret) {
+ dev_err(dev, "can not find ep %s", ep_name);
+ return -EINVAL;
+ }
+
+ ret = fdt_del_node(blob, ep_offset);
+ if (ret)
+ dev_err(dev, "delete node %s failed, ret %d", ep_name, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(xrt_md_del_endpoint);
+
+static int __xrt_md_add_endpoint(struct device *dev, char *blob,
+ struct xrt_md_endpoint *ep, int *offset, bool root)
+{
+ int ret = 0;
+ int ep_offset = 0;
+ u32 val, count = 0;
+ u64 io_range[2];
+ char comp[128];
+
+ if (!ep->ep_name) {
+ dev_err(dev, "empty name");
+ return -EINVAL;
+ }
+
+ if (!root) {
+ ret = xrt_md_get_endpoint(dev, blob, XRT_MD_NODE_ENDPOINTS, NULL,
+ &ep_offset);
+ if (ret) {
+ dev_err(dev, "invalid blob, ret = %d", ret);
+ return -EINVAL;
+ }
+ }
+
+ ep_offset = xrt_md_add_node(dev, blob, ep_offset, ep->ep_name);
+ if (ep_offset < 0) {
+ dev_err(dev, "add endpoint failed, ret = %d", ret);
+ return -EINVAL;
+ }
+ if (offset)
+ *offset = ep_offset;
+
+ if (ep->size != 0) {
+ val = cpu_to_be32(ep->bar);
+ ret = xrt_md_setprop(dev, blob, ep_offset, XRT_MD_PROP_BAR_IDX,
+ &val, sizeof(u32));
+ if (ret) {
+ dev_err(dev, "set %s failed, ret %d",
+ XRT_MD_PROP_BAR_IDX, ret);
+ goto failed;
+ }
+ io_range[0] = cpu_to_be64((u64)ep->bar_off);
+ io_range[1] = cpu_to_be64((u64)ep->size);
+ ret = xrt_md_setprop(dev, blob, ep_offset, XRT_MD_PROP_IO_OFFSET,
+ io_range, sizeof(io_range));
+ if (ret) {
+ dev_err(dev, "set %s failed, ret %d",
+ XRT_MD_PROP_IO_OFFSET, ret);
+ goto failed;
+ }
+ }
+
+ if (ep->regmap) {
+ if (ep->regmap_ver) {
+ count = snprintf(comp, sizeof(comp),
+ "%s-%s", ep->regmap, ep->regmap_ver);
+ count++;
+ }
+
+ count += snprintf(comp + count, sizeof(comp) - count,
+ "%s", ep->regmap);
+ count++;
+
+ ret = xrt_md_setprop(dev, blob, ep_offset, XRT_MD_PROP_COMPATIBLE,
+ comp, count);
+ if (ret) {
+ dev_err(dev, "set %s failed, ret %d",
+ XRT_MD_PROP_COMPATIBLE, ret);
+ goto failed;
+ }
+ }
+
+failed:
+ if (ret)
+ xrt_md_del_endpoint(dev, blob, ep->ep_name, NULL);
+
+ return ret;
+}
+
+int xrt_md_add_endpoint(struct device *dev, char *blob,
+ struct xrt_md_endpoint *ep)
+{
+ return __xrt_md_add_endpoint(dev, blob, ep, NULL, false);
+}
+EXPORT_SYMBOL_GPL(xrt_md_add_endpoint);
+
+static int xrt_md_get_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ int *ep_offset)
+{
+ int offset;
+ const char *name;
+
+ for (offset = fdt_next_node(blob, -1, NULL);
+ offset >= 0;
+ offset = fdt_next_node(blob, offset, NULL)) {
+ name = fdt_get_name(blob, offset, NULL);
+ if (!name || strncmp(name, ep_name, strlen(ep_name) + 1))
+ continue;
+ if (!regmap_name ||
+ !fdt_node_check_compatible(blob, offset, regmap_name))
+ break;
+ }
+ if (offset < 0)
+ return -ENODEV;
+
+ *ep_offset = offset;
+
+ return 0;
+}
+
+int xrt_md_find_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ const char **epname)
+{
+ int offset;
+ int ret;
+
+ ret = xrt_md_get_endpoint(dev, blob, ep_name, regmap_name,
+ &offset);
+ if (!ret && epname && offset >= 0)
+ *epname = fdt_get_name(blob, offset, NULL);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(xrt_md_find_endpoint);
+
+int xrt_md_get_prop(struct device *dev, const char *blob, const char *ep_name,
+ const char *regmap_name, const char *prop,
+ const void **val, int *size)
+{
+ int offset;
+ int ret;
+
+ if (val)
+ *val = NULL;
+ if (ep_name) {
+ ret = xrt_md_get_endpoint(dev, blob, ep_name, regmap_name,
+ &offset);
+ if (ret) {
+ dev_err(dev, "cannot get ep %s, regmap %s, ret = %d",
+ ep_name, regmap_name, ret);
+ return -EINVAL;
+ }
+ } else {
+ offset = fdt_next_node(blob, -1, NULL);
+ if (offset < 0) {
+ dev_err(dev, "internal error, ret = %d", offset);
+ return -EINVAL;
+ }
+ }
+
+ if (val) {
+ *val = fdt_getprop(blob, offset, prop, size);
+ if (!*val) {
+ dev_dbg(dev, "get ep %s, prop %s failed", ep_name, prop);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xrt_md_get_prop);
+
+static int xrt_md_setprop(struct device *dev, char *blob, int offset,
+ const char *prop, const void *val, int size)
+{
+ int ret;
+
+ ret = fdt_setprop(blob, offset, prop, val, size);
+ if (ret)
+ dev_err(dev, "failed to set prop %d", ret);
+
+ return ret;
+}
+
+int xrt_md_set_prop(struct device *dev, char *blob,
+ const char *ep_name, const char *regmap_name,
+ const char *prop, const void *val, int size)
+{
+ int offset;
+ int ret;
+
+ if (ep_name) {
+ ret = xrt_md_get_endpoint(dev, blob, ep_name,
+ regmap_name, &offset);
+ if (ret) {
+ dev_err(dev, "cannot get node %s, ret = %d",
+ ep_name, ret);
+ return -EINVAL;
+ }
+ } else {
+ offset = fdt_next_node(blob, -1, NULL);
+ if (offset < 0) {
+ dev_err(dev, "internal error, ret = %d", offset);
+ return -EINVAL;
+ }
+ }
+
+ ret = xrt_md_setprop(dev, blob, offset, prop, val, size);
+ if (ret)
+ dev_err(dev, "set prop %s failed, ret = %d", prop, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(xrt_md_set_prop);
+
+int xrt_md_copy_endpoint(struct device *dev, char *blob, const char *src_blob,
+ const char *ep_name, const char *regmap_name,
+ const char *new_ep_name)
+{
+ int offset, target;
+ int ret;
+ struct xrt_md_endpoint ep = {0};
+ const char *newepnm = new_ep_name ? new_ep_name : ep_name;
+
+ ret = xrt_md_get_endpoint(dev, src_blob, ep_name, regmap_name,
+ &offset);
+ if (ret)
+ return -EINVAL;
+
+ ret = xrt_md_get_endpoint(dev, blob, newepnm, regmap_name, &target);
+ if (ret) {
+ ep.ep_name = newepnm;
+ ret = __xrt_md_add_endpoint(dev, blob, &ep, &target,
+ fdt_parent_offset(src_blob, offset) == 0);
+ if (ret)
+ return -EINVAL;
+ }
+
+ ret = xrt_md_overlay(dev, blob, target, src_blob, offset);
+ if (ret)
+ dev_err(dev, "overlay failed, ret = %d", ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(xrt_md_copy_endpoint);
+
+char *xrt_md_dup(struct device *dev, const char *blob)
+{
+ int ret;
+ char *dup_blob;
+
+ ret = xrt_md_create(dev, &dup_blob);
+ if (ret)
+ return NULL;
+ ret = xrt_md_overlay(dev, dup_blob, -1, blob, -1);
+ if (ret) {
+ vfree(dup_blob);
+ return NULL;
+ }
+
+ return dup_blob;
+}
+EXPORT_SYMBOL_GPL(xrt_md_dup);
+
+static int xrt_md_overlay(struct device *dev, char *blob, int target,
+ const char *overlay_blob, int overlay_offset)
+{
+ int property, subnode;
+ int ret;
+
+ WARN_ON(!blob || !overlay_blob);
+
+ if (!blob) {
+ dev_err(dev, "blob is NULL");
+ return -EINVAL;
+ }
+
+ if (target < 0) {
+ target = fdt_next_node(blob, -1, NULL);
+ if (target < 0) {
+ dev_err(dev, "invalid target");
+ return -EINVAL;
+ }
+ }
+ if (overlay_offset < 0) {
+ overlay_offset = fdt_next_node(overlay_blob, -1, NULL);
+ if (overlay_offset < 0) {
+ dev_err(dev, "invalid overlay");
+ return -EINVAL;
+ }
+ }
+
+ fdt_for_each_property_offset(property, overlay_blob, overlay_offset) {
+ const char *name;
+ const void *prop;
+ int prop_len;
+
+ prop = fdt_getprop_by_offset(overlay_blob, property, &name,
+ &prop_len);
+ if (!prop || prop_len >= MAX_BLOB_SIZE) {
+ dev_err(dev, "internal error");
+ return -EINVAL;
+ }
+
+ ret = xrt_md_setprop(dev, blob, target, name, prop,
+ prop_len);
+ if (ret) {
+ dev_err(dev, "setprop failed, ret = %d", ret);
+ return ret;
+ }
+ }
+
+ fdt_for_each_subnode(subnode, overlay_blob, overlay_offset) {
+ const char *name = fdt_get_name(overlay_blob, subnode, NULL);
+ int nnode;
+
+ nnode = xrt_md_add_node(dev, blob, target, name);
+ if (nnode == -FDT_ERR_EXISTS)
+ nnode = fdt_subnode_offset(blob, target, name);
+ if (nnode < 0) {
+ dev_err(dev, "add node failed, ret = %d", nnode);
+ return nnode;
+ }
+
+ ret = xrt_md_overlay(dev, blob, nnode, overlay_blob, subnode);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int xrt_md_get_next_endpoint(struct device *dev, const char *blob,
+ const char *ep_name, const char *regmap_name,
+ char **next_ep, char **next_regmap)
+{
+ int offset, ret;
+
+ if (!ep_name) {
+ ret = xrt_md_get_endpoint(dev, blob, XRT_MD_NODE_ENDPOINTS, NULL,
+ &offset);
+ } else {
+ ret = xrt_md_get_endpoint(dev, blob, ep_name, regmap_name,
+ &offset);
+ }
+
+ if (ret) {
+ *next_ep = NULL;
+ *next_regmap = NULL;
+ return -EINVAL;
+ }
+
+ offset = ep_name ? fdt_next_subnode(blob, offset) :
+ fdt_first_subnode(blob, offset);
+ if (offset < 0) {
+ *next_ep = NULL;
+ *next_regmap = NULL;
+ return -EINVAL;
+ }
+
+ *next_ep = (char *)fdt_get_name(blob, offset, NULL);
+ *next_regmap = (char *)fdt_stringlist_get(blob, offset, XRT_MD_PROP_COMPATIBLE,
+ 0, NULL);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xrt_md_get_next_endpoint);
+
+int xrt_md_get_compatible_endpoint(struct device *dev, const char *blob,
+ const char *regmap_name, const char **ep_name)
+{
+ int ep_offset;
+
+ ep_offset = fdt_node_offset_by_compatible(blob, -1, regmap_name);
+ if (ep_offset < 0) {
+ *ep_name = NULL;
+ return -ENOENT;
+ }
+
+ *ep_name = (char *)fdt_get_name(blob, ep_offset, NULL);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xrt_md_get_compatible_endpoint);
+
+void xrt_md_pack(struct device *dev, char *blob)
+{
+ int ret;
+
+ ret = fdt_pack(blob);
+ if (ret)
+ dev_err(dev, "pack failed %d", ret);
+}
+EXPORT_SYMBOL_GPL(xrt_md_pack);
+
+int xrt_md_get_intf_uuids(struct device *dev, const char *blob,
+ u32 *num_uuids, uuid_t *intf_uuids)
+{
+ int offset, count = 0;
+ int ret;
+ const char *uuid_str;
+
+ ret = xrt_md_get_endpoint(dev, blob, XRT_MD_NODE_INTERFACES, NULL, &offset);
+ if (ret)
+ return -ENOENT;
+
+ for (offset = fdt_first_subnode(blob, offset);
+ offset >= 0;
+ offset = fdt_next_subnode(blob, offset)) {
+ uuid_str = fdt_getprop(blob, offset, XRT_MD_PROP_INTERFACE_UUID,
+ NULL);
+ if (!uuid_str) {
+ dev_err(dev, "empty intf uuid node");
+ return -EINVAL;
+ }
+
+ if (intf_uuids && count < *num_uuids) {
+ ret = xrt_md_trans_str2uuid(dev, uuid_str,
+ &intf_uuids[count]);
+ if (ret)
+ return -EINVAL;
+ }
+ count++;
+ }
+
+ *num_uuids = count;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xrt_md_get_intf_uuids);
--
2.18.4