Hi Fernando, On 02/22/2021 05:23 PM, Fernando Pacheco wrote:
On Wed, Feb 17, 2021 at 10:40:03PM -0800, Lizhi Hou wrote: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@xxxxxxxxxx> Signed-off-by: Max Zhen <max.zhen@xxxxxxxxxx> Signed-off-by: Lizhi Hou <lizhih@xxxxxxxxxx> --- 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@xxxxxxxxxx> + */ + +#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"Should this be "drv_ep_mailbox_vsec_00"?
Will fix this.
+#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@xxxxxxxxxx> + */ + +#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;how about (avoiding len = len): if (len > MAX_BLOB_SIZE) return XRT_MD_INVALID_LENGTH; return len;
Agree. Will fix.
+ return len; +} +EXPORT_SYMBOL_GPL(xrt_md_size); + +int xrt_md_create(struct device *dev, char **blob) +{ + int ret = 0; + + WARN_ON(!blob);Shouldn't this be signaled to caller as a -EINVAL?
Agree. Will fix it.
+ + *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);A little hard to follow when you re-use ep_offset like this. Maybe parent_offset to match xrt_md_add_node parameter?
Will add parent_offset.
Using 'if' statement to check is good enough and I will remove WARN_ON from both places.+ 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);Why check !blob twice? Also, is a WARN_ON justified here (and in xrt_md_create)?
Thanks, Lizhi
Fernando+ + 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
