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lotus-nexthoplotus-nexthop
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IGNORE THIS COMMIT: Multiple FPGAs w/ I2C IP block (PR sonic-net#22748)
1 parent e5734f0 commit 882146c

14 files changed

Lines changed: 1402 additions & 6 deletions

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‎platform/pddf/i2c/debian/rules‎

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@@ -19,7 +19,7 @@ PACKAGE_PRE_NAME := sonic-platform-pddf
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KVERSION ?= $(shell uname -r)
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KERNEL_SRC := /lib/modules/$(KVERSION)
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MOD_SRC_DIR:= $(shell pwd)
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MODULE_DIRS:= client cpld cpld/driver cpldmux cpldmux/driver fpgai2c fpgai2c/driver fpgapci fpgapci/driver fpgapci/algos fan fan/driver mux gpio led psu psu/driver sysstatus xcvr xcvr/driver
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MODULE_DIRS:= client cpld cpld/driver cpldmux cpldmux/driver fpgai2c fpgai2c/driver fpgapci fpgapci/driver fpgapci/algos multifpgapci multifpgapci/driver multifpgapci/i2c fan fan/driver mux gpio led psu psu/driver sysstatus xcvr xcvr/driver
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MODULE_DIR:= modules
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UTILS_DIR := utils
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SERVICE_DIR := service

‎platform/pddf/i2c/modules/Makefile‎

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@@ -1 +1 @@
1-
obj-m := client/ cpld/ cpldmux/ fpgai2c/ fpgapci/ xcvr/ mux/ gpio/ psu/ fan/ led/ sysstatus/
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obj-m := client/ cpld/ cpldmux/ fpgai2c/ fpgapci/ multifpgapci/ xcvr/ mux/ gpio/ psu/ fan/ led/ sysstatus/

‎platform/pddf/i2c/modules/include/pddf_client_defs.h‎

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@@ -34,6 +34,7 @@
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#define SYSSTATUS "PDDF_SYSSTATUS"
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#define XCVR "PDDF_XCVR"
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#define FPGA "PDDF_FPGAPCI"
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#define MULTIFPGA "PDDF_MULTIFPGAPCI"
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#define PDDF_DEBUG
@@ -63,6 +64,15 @@ typedef struct pddf_data_attribute{
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.addr = _addr, \
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.data = _data }
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#define PDDF_DATA_ATTR_VAL(_name, _mode, _show, _store, _type, _len, _addr, _data) \
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(PDDF_ATTR){ \
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.dev_attr = __ATTR(_name, _mode, _show, _store), \
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.type = _type, \
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.len = _len, \
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.addr = _addr, \
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.data = _data \
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}
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enum attribute_data_type {
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PDDF_CHAR,

‎platform/pddf/i2c/modules/include/pddf_i2c_algo.h‎

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@@ -9,7 +9,7 @@
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#include "pddf_client_defs.h"
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/* max number of adapters */
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#define I2C_PCI_MAX_BUS 16
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#define I2C_PCI_MAX_BUS 512
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/**
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* struct fpgapci_devdata - PCI device data structure

‎platform/pddf/i2c/modules/include/pddf_multifpgapci_defs.h‎

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@@ -0,0 +1,58 @@
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/*
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* Copyright 2025 Nexthop Systems Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Description:
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* Platform MULTIFPGAPCI defines/structures header file
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*/
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#ifndef __PDDF_MULTIFPGAPCI_DEFS_H__
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#define __PDDF_MULTIFPGAPCI_DEFS_H__
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#include "linux/types.h"
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#include <linux/pci.h>
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#include "pddf_multifpgapci_i2c_defs.h"
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#define NAME_SIZE 32
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#define KOBJ_FREE(obj) \
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if (obj) \
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kobject_put(obj);
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struct pddf_multifpgapci_drvdata {
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struct pci_dev *pci_dev;
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resource_size_t bar_start;
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void *__iomem fpga_data_base_addr;
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// i2c
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size_t bar_length;
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struct kobject *i2c_kobj;
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struct i2c_adapter_drvdata i2c_adapter_drvdata;
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bool i2c_adapter_drvdata_initialized;
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};
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// FPGA
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typedef struct {
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uint32_t data_base_offset;
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uint32_t data_size;
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} FPGA_OPS_DATA;
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struct pddf_multi_fpgapci_ops_t {
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int (*post_device_operation)(struct pci_dev *);
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};
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extern struct pddf_multi_fpgapci_ops_t pddf_multi_fpgapci_ops;
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struct pci_dev *multifpgapci_get_pci_dev(const char *bdf);
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extern int (*ptr_multifpgapci_readpci)(struct pci_dev *, uint32_t, uint32_t *);
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extern int (*ptr_multifpgapci_writepci)(struct pci_dev *, uint32_t, uint32_t);
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#endif

‎platform/pddf/i2c/modules/include/pddf_multifpgapci_i2c_defs.h‎

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@@ -0,0 +1,73 @@
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/*
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* Copyright 2025 Nexthop Systems Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
10+
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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15+
#ifndef __PDDF_MULTIFPGAPCI_I2C_DEFS_H__
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#define __PDDF_MULTIFPGAPCI_I2C_DEFS_H__
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#include <linux/i2c.h>
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#include "linux/types.h"
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#include <linux/kobject.h>
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#include <linux/pci.h>
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#include <linux/sysfs.h>
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#include "pddf_client_defs.h"
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#define I2C_PCI_MAX_BUS 512
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struct i2c_adapter_attrs {
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PDDF_ATTR attr_virt_bus;
30+
PDDF_ATTR attr_ch_base_offset;
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PDDF_ATTR attr_ch_size;
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PDDF_ATTR attr_num_virt_ch;
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PDDF_ATTR attr_new_i2c_adapter;
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PDDF_ATTR attr_del_i2c_adapter;
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};
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#define NUM_I2C_ADAPTER_ATTRS \
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(sizeof(struct i2c_adapter_attrs) / sizeof(PDDF_ATTR))
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struct i2c_adapter_sysfs_vals {
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uint32_t virt_bus;
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uint32_t ch_base_offset;
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uint32_t ch_size;
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uint32_t num_virt_ch;
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};
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struct i2c_adapter_drvdata {
48+
// temp_sysfs_vals store temporary values provided by sysfs,
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// which are eventually copied/saved to I2C adapter platform data.
50+
struct i2c_adapter_sysfs_vals temp_sysfs_vals;
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// platform data
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struct i2c_adapter i2c_adapters[I2C_PCI_MAX_BUS];
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bool i2c_adapter_registered[I2C_PCI_MAX_BUS];
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int virt_bus;
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void *__iomem ch_base_addr;
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int ch_size;
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int num_virt_ch;
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60+
// sysfs attrs
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struct i2c_adapter_attrs attrs;
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struct attribute *i2c_adapter_attrs[NUM_I2C_ADAPTER_ATTRS + 1];
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struct attribute_group i2c_adapter_attr_group;
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};
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extern int pddf_multifpgapci_i2c_module_init(struct pci_dev *pci_dev,
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struct kobject *kobj);
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// Only called if multifpgapci_i2c_module_init succeeded
70+
extern void pddf_multifpgapci_i2c_module_exit(struct pci_dev *pci_dev,
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struct kobject *kobj);
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73+
#endif

‎platform/pddf/i2c/modules/multifpgapci/Makefile‎

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@@ -0,0 +1,4 @@
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obj-m := driver/ i2c/
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obj-m += pddf_multifpgapci_module.o
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4+
ccflags-y:= -I$(M)/modules/include

‎platform/pddf/i2c/modules/multifpgapci/driver/Makefile‎

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@@ -0,0 +1,4 @@
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TARGET = pddf_multifpgapci_driver
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obj-m := $(TARGET).o
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ccflags-y := -I$(M)/modules/include

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