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Subject[PATCH V4 net-next 03/21] net-next/hinic: Initialize api cmd resources
Date
Initialize api cmd resources as part of management initialization.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
---
drivers/net/ethernet/huawei/hinic/Makefile | 4 +-
.../net/ethernet/huawei/hinic/hinic_hw_api_cmd.c | 446 +++++++++++++++++++++
.../net/ethernet/huawei/hinic/hinic_hw_api_cmd.h | 102 +++++
drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c | 10 +
drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.h | 3 +
5 files changed, 563 insertions(+), 2 deletions(-)
create mode 100644 drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.c
create mode 100644 drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.h

diff --git a/drivers/net/ethernet/huawei/hinic/Makefile b/drivers/net/ethernet/huawei/hinic/Makefile
index 717ad71..beba90a 100644
--- a/drivers/net/ethernet/huawei/hinic/Makefile
+++ b/drivers/net/ethernet/huawei/hinic/Makefile
@@ -1,4 +1,4 @@
obj-$(CONFIG_HINIC) += hinic.o

-hinic-y := hinic_main.o hinic_hw_dev.o hinic_hw_mgmt.o hinic_hw_eqs.o \
- hinic_hw_if.o
+hinic-y := hinic_main.o hinic_hw_dev.o hinic_hw_mgmt.o hinic_hw_api_cmd.o \
+ hinic_hw_eqs.o hinic_hw_if.o
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.c
new file mode 100644
index 0000000..4291f8e
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.c
@@ -0,0 +1,446 @@
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <asm/byteorder.h>
+
+#include "hinic_hw_if.h"
+#include "hinic_hw_api_cmd.h"
+
+#define API_CHAIN_NUM_CELLS 32
+
+#define API_CMD_CELL_SIZE_SHIFT 6
+#define API_CMD_CELL_SIZE_MIN (BIT(API_CMD_CELL_SIZE_SHIFT))
+
+#define API_CMD_CELL_SIZE(cell_size) \
+ (((cell_size) >= API_CMD_CELL_SIZE_MIN) ? \
+ (1 << (fls(cell_size - 1))) : API_CMD_CELL_SIZE_MIN)
+
+#define API_CMD_BUF_SIZE 2048
+
+/**
+ * api_cmd_chain_hw_init - initialize the chain in the HW
+ * @chain: the API CMD specific chain to initialize in HW
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int api_cmd_chain_hw_init(struct hinic_api_cmd_chain *chain)
+{
+ /* should be implemented */
+ return 0;
+}
+
+/**
+ * free_cmd_buf - free the dma buffer of API CMD command
+ * @chain: the API CMD specific chain of the cmd
+ * @cell_idx: the cell index of the cmd
+ **/
+static void free_cmd_buf(struct hinic_api_cmd_chain *chain, int cell_idx)
+{
+ struct hinic_api_cmd_cell_ctxt *cell_ctxt;
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+
+ cell_ctxt = &chain->cell_ctxt[cell_idx];
+
+ dma_free_coherent(&pdev->dev, API_CMD_BUF_SIZE,
+ cell_ctxt->api_cmd_vaddr,
+ cell_ctxt->api_cmd_paddr);
+}
+
+/**
+ * alloc_cmd_buf - allocate a dma buffer for API CMD command
+ * @chain: the API CMD specific chain for the cmd
+ * @cell: the cell in the HW for the cmd
+ * @cell_idx: the index of the cell
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int alloc_cmd_buf(struct hinic_api_cmd_chain *chain,
+ struct hinic_api_cmd_cell *cell, int cell_idx)
+{
+ struct hinic_api_cmd_cell_ctxt *cell_ctxt;
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ dma_addr_t cmd_paddr;
+ u8 *cmd_vaddr;
+ int err = 0;
+
+ cmd_vaddr = dma_zalloc_coherent(&pdev->dev, API_CMD_BUF_SIZE,
+ &cmd_paddr, GFP_KERNEL);
+ if (!cmd_vaddr) {
+ dev_err(&pdev->dev, "Failed to allocate API CMD DMA memory\n");
+ return -ENOMEM;
+ }
+
+ cell_ctxt = &chain->cell_ctxt[cell_idx];
+
+ cell_ctxt->api_cmd_vaddr = cmd_vaddr;
+ cell_ctxt->api_cmd_paddr = cmd_paddr;
+
+ /* set the cmd DMA address in the cell */
+ switch (chain->chain_type) {
+ case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
+ /* The data in the HW should be in Big Endian Format */
+ cell->write.hw_cmd_paddr = cpu_to_be64(cmd_paddr);
+ break;
+
+ default:
+ dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
+ free_cmd_buf(chain, cell_idx);
+ err = -EINVAL;
+ break;
+ }
+
+ return err;
+}
+
+/**
+ * api_cmd_create_cell - create API CMD cell for specific chain
+ * @chain: the API CMD specific chain to create its cell
+ * @cell_idx: the index of the cell to create
+ * @pre_node: previous cell
+ * @node_vaddr: the returned virt addr of the cell
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int api_cmd_create_cell(struct hinic_api_cmd_chain *chain,
+ int cell_idx,
+ struct hinic_api_cmd_cell *pre_node,
+ struct hinic_api_cmd_cell **node_vaddr)
+{
+ struct hinic_api_cmd_cell_ctxt *cell_ctxt;
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ struct hinic_api_cmd_cell *node;
+ dma_addr_t node_paddr;
+ int err;
+
+ node = dma_zalloc_coherent(&pdev->dev, chain->cell_size,
+ &node_paddr, GFP_KERNEL);
+ if (!node) {
+ dev_err(&pdev->dev, "Failed to allocate dma API CMD cell\n");
+ return -ENOMEM;
+ }
+
+ node->read.hw_wb_resp_paddr = 0;
+
+ cell_ctxt = &chain->cell_ctxt[cell_idx];
+ cell_ctxt->cell_vaddr = node;
+ cell_ctxt->cell_paddr = node_paddr;
+
+ if (!pre_node) {
+ chain->head_cell_paddr = node_paddr;
+ chain->head_node = node;
+ } else {
+ /* The data in the HW should be in Big Endian Format */
+ pre_node->next_cell_paddr = cpu_to_be64(node_paddr);
+ }
+
+ switch (chain->chain_type) {
+ case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
+ err = alloc_cmd_buf(chain, node, cell_idx);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to allocate cmd buffer\n");
+ goto err_alloc_cmd_buf;
+ }
+ break;
+
+ default:
+ dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
+ err = -EINVAL;
+ goto err_alloc_cmd_buf;
+ }
+
+ *node_vaddr = node;
+ return 0;
+
+err_alloc_cmd_buf:
+ dma_free_coherent(&pdev->dev, chain->cell_size, node, node_paddr);
+ return err;
+}
+
+/**
+ * api_cmd_destroy_cell - destroy API CMD cell of specific chain
+ * @chain: the API CMD specific chain to destroy its cell
+ * @cell_idx: the cell to destroy
+ **/
+static void api_cmd_destroy_cell(struct hinic_api_cmd_chain *chain,
+ int cell_idx)
+{
+ struct hinic_api_cmd_cell_ctxt *cell_ctxt;
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ struct hinic_api_cmd_cell *node;
+ dma_addr_t node_paddr;
+ size_t node_size;
+
+ cell_ctxt = &chain->cell_ctxt[cell_idx];
+
+ node = cell_ctxt->cell_vaddr;
+ node_paddr = cell_ctxt->cell_paddr;
+ node_size = chain->cell_size;
+
+ if (cell_ctxt->api_cmd_vaddr) {
+ switch (chain->chain_type) {
+ case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
+ free_cmd_buf(chain, cell_idx);
+ break;
+ default:
+ dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
+ break;
+ }
+
+ dma_free_coherent(&pdev->dev, node_size, node,
+ node_paddr);
+ }
+}
+
+/**
+ * api_cmd_destroy_cells - destroy API CMD cells of specific chain
+ * @chain: the API CMD specific chain to destroy its cells
+ * @num_cells: number of cells to destroy
+ **/
+static void api_cmd_destroy_cells(struct hinic_api_cmd_chain *chain,
+ int num_cells)
+{
+ int cell_idx;
+
+ for (cell_idx = 0; cell_idx < num_cells; cell_idx++)
+ api_cmd_destroy_cell(chain, cell_idx);
+}
+
+/**
+ * api_cmd_create_cells - create API CMD cells for specific chain
+ * @chain: the API CMD specific chain
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int api_cmd_create_cells(struct hinic_api_cmd_chain *chain)
+{
+ struct hinic_api_cmd_cell *node = NULL, *pre_node = NULL;
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ int err, cell_idx;
+
+ for (cell_idx = 0; cell_idx < chain->num_cells; cell_idx++) {
+ err = api_cmd_create_cell(chain, cell_idx, pre_node, &node);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to create API CMD cell\n");
+ goto err_create_cell;
+ }
+
+ pre_node = node;
+ }
+
+ /* set the Final node to point on the start */
+ node->next_cell_paddr = cpu_to_be64(chain->head_cell_paddr);
+
+ /* set the current node to be the head */
+ chain->curr_node = chain->head_node;
+ return 0;
+
+err_create_cell:
+ api_cmd_destroy_cells(chain, cell_idx);
+ return err;
+}
+
+/**
+ * api_chain_init - initialize API CMD specific chain
+ * @chain: the API CMD specific chain to initialize
+ * @attr: attributes to set in the chain
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int api_chain_init(struct hinic_api_cmd_chain *chain,
+ struct hinic_api_cmd_chain_attr *attr)
+{
+ struct hinic_hwif *hwif = attr->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ size_t cell_ctxt_size;
+
+ chain->hwif = hwif;
+ chain->chain_type = attr->chain_type;
+ chain->num_cells = attr->num_cells;
+ chain->cell_size = attr->cell_size;
+
+ chain->prod_idx = 0;
+ chain->cons_idx = 0;
+
+ cell_ctxt_size = chain->num_cells * sizeof(*chain->cell_ctxt);
+ chain->cell_ctxt = devm_kzalloc(&pdev->dev, cell_ctxt_size, GFP_KERNEL);
+ if (!chain->cell_ctxt)
+ return -ENOMEM;
+
+ chain->wb_status = dma_zalloc_coherent(&pdev->dev,
+ sizeof(*chain->wb_status),
+ &chain->wb_status_paddr,
+ GFP_KERNEL);
+ if (!chain->wb_status) {
+ dev_err(&pdev->dev, "Failed to allocate DMA wb status\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/**
+ * api_chain_free - free API CMD specific chain
+ * @chain: the API CMD specific chain to free
+ **/
+static void api_chain_free(struct hinic_api_cmd_chain *chain)
+{
+ struct hinic_hwif *hwif = chain->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+
+ dma_free_coherent(&pdev->dev, sizeof(*chain->wb_status),
+ chain->wb_status, chain->wb_status_paddr);
+}
+
+/**
+ * api_cmd_create_chain - create API CMD specific chain
+ * @attr: attributes to set the chain
+ *
+ * Return the created chain
+ **/
+static struct hinic_api_cmd_chain *
+ api_cmd_create_chain(struct hinic_api_cmd_chain_attr *attr)
+{
+ struct hinic_hwif *hwif = attr->hwif;
+ struct pci_dev *pdev = hwif->pdev;
+ struct hinic_api_cmd_chain *chain;
+ int err;
+
+ if (attr->num_cells & (attr->num_cells - 1)) {
+ dev_err(&pdev->dev, "Invalid number of cells, must be power of 2\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
+ if (!chain)
+ return ERR_PTR(-ENOMEM);
+
+ err = api_chain_init(chain, attr);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize chain\n");
+ return ERR_PTR(err);
+ }
+
+ err = api_cmd_create_cells(chain);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to create cells for API CMD chain\n");
+ goto err_create_cells;
+ }
+
+ err = api_cmd_chain_hw_init(chain);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize chain HW\n");
+ goto err_chain_hw_init;
+ }
+
+ return chain;
+
+err_chain_hw_init:
+ api_cmd_destroy_cells(chain, chain->num_cells);
+
+err_create_cells:
+ api_chain_free(chain);
+ return ERR_PTR(err);
+}
+
+/**
+ * api_cmd_destroy_chain - destroy API CMD specific chain
+ * @chain: the API CMD specific chain to destroy
+ **/
+static void api_cmd_destroy_chain(struct hinic_api_cmd_chain *chain)
+{
+ api_cmd_destroy_cells(chain, chain->num_cells);
+ api_chain_free(chain);
+}
+
+/**
+ * hinic_api_cmd_init - Initialize all the API CMD chains
+ * @chain: the API CMD chains that are initialized
+ * @hwif: the hardware interface of a pci function device
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_api_cmd_init(struct hinic_api_cmd_chain **chain,
+ struct hinic_hwif *hwif)
+{
+ enum hinic_api_cmd_chain_type type, chain_type;
+ struct hinic_api_cmd_chain_attr attr;
+ struct pci_dev *pdev = hwif->pdev;
+ size_t hw_cell_sz;
+ int err;
+
+ hw_cell_sz = sizeof(struct hinic_api_cmd_cell);
+
+ attr.hwif = hwif;
+ attr.num_cells = API_CHAIN_NUM_CELLS;
+ attr.cell_size = API_CMD_CELL_SIZE(hw_cell_sz);
+
+ chain_type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
+ for ( ; chain_type < HINIC_API_CMD_MAX; chain_type++) {
+ attr.chain_type = chain_type;
+
+ if (chain_type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
+ continue;
+
+ chain[chain_type] = api_cmd_create_chain(&attr);
+ if (IS_ERR(chain[chain_type])) {
+ dev_err(&pdev->dev, "Failed to create chain %d\n",
+ chain_type);
+ goto err_create_chain;
+ }
+ }
+
+ return 0;
+
+err_create_chain:
+ type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
+ for ( ; type < chain_type; type++) {
+ if (type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
+ continue;
+
+ api_cmd_destroy_chain(chain[type]);
+ }
+
+ return err;
+}
+
+/**
+ * hinic_api_cmd_free - free the API CMD chains
+ * @chain: the API CMD chains that are freed
+ **/
+void hinic_api_cmd_free(struct hinic_api_cmd_chain **chain)
+{
+ enum hinic_api_cmd_chain_type chain_type;
+
+ chain_type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
+ for ( ; chain_type < HINIC_API_CMD_MAX; chain_type++) {
+ if (chain_type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
+ continue;
+
+ api_cmd_destroy_chain(chain[chain_type]);
+ }
+}
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.h b/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.h
new file mode 100644
index 0000000..9c7d1e5
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_api_cmd.h
@@ -0,0 +1,102 @@
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ */
+
+#ifndef HINIC_HW_API_CMD_H
+#define HINIC_HW_API_CMD_H
+
+#include <linux/types.h>
+
+#include "hinic_hw_if.h"
+
+enum hinic_api_cmd_chain_type {
+ HINIC_API_CMD_WRITE_TO_MGMT_CPU = 2,
+
+ HINIC_API_CMD_MAX,
+};
+
+struct hinic_api_cmd_chain_attr {
+ struct hinic_hwif *hwif;
+ enum hinic_api_cmd_chain_type chain_type;
+
+ u32 num_cells;
+ u16 cell_size;
+};
+
+struct hinic_api_cmd_status {
+ u64 header;
+ u32 status;
+ u32 rsvd0;
+ u32 rsvd1;
+ u32 rsvd2;
+ u64 rsvd3;
+};
+
+/* HW struct */
+struct hinic_api_cmd_cell {
+ u64 ctrl;
+
+ /* address is 64 bit in HW struct */
+ u64 next_cell_paddr;
+
+ u64 desc;
+
+ /* HW struct */
+ union {
+ struct {
+ u64 hw_cmd_paddr;
+ } write;
+
+ struct {
+ u64 hw_wb_resp_paddr;
+ u64 hw_cmd_paddr;
+ } read;
+ };
+};
+
+struct hinic_api_cmd_cell_ctxt {
+ dma_addr_t cell_paddr;
+ struct hinic_api_cmd_cell *cell_vaddr;
+
+ dma_addr_t api_cmd_paddr;
+ u8 *api_cmd_vaddr;
+};
+
+struct hinic_api_cmd_chain {
+ struct hinic_hwif *hwif;
+ enum hinic_api_cmd_chain_type chain_type;
+
+ u32 num_cells;
+ u16 cell_size;
+
+ /* HW members in 24 bit format */
+ u32 prod_idx;
+ u32 cons_idx;
+
+ struct hinic_api_cmd_cell_ctxt *cell_ctxt;
+
+ dma_addr_t wb_status_paddr;
+ struct hinic_api_cmd_status *wb_status;
+
+ dma_addr_t head_cell_paddr;
+ struct hinic_api_cmd_cell *head_node;
+ struct hinic_api_cmd_cell *curr_node;
+};
+
+int hinic_api_cmd_init(struct hinic_api_cmd_chain **chain,
+ struct hinic_hwif *hwif);
+
+void hinic_api_cmd_free(struct hinic_api_cmd_chain **chain);
+
+#endif
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
index 8ae8ed9..f914bc7 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
@@ -19,6 +19,7 @@

#include "hinic_hw_if.h"
#include "hinic_hw_eqs.h"
+#include "hinic_hw_api_cmd.h"
#include "hinic_hw_mgmt.h"
#include "hinic_hw_dev.h"

@@ -70,9 +71,17 @@ int hinic_pf_to_mgmt_init(struct hinic_pf_to_mgmt *pf_to_mgmt,
{
struct hinic_pfhwdev *pfhwdev = mgmt_to_pfhwdev(pf_to_mgmt);
struct hinic_hwdev *hwdev = &pfhwdev->hwdev;
+ struct pci_dev *pdev = hwif->pdev;
+ int err;

pf_to_mgmt->hwif = hwif;

+ err = hinic_api_cmd_init(pf_to_mgmt->cmd_chain, hwif);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to initialize cmd chains\n");
+ return err;
+ }
+
hinic_aeq_register_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU,
pf_to_mgmt,
mgmt_msg_aeqe_handler);
@@ -89,4 +98,5 @@ void hinic_pf_to_mgmt_free(struct hinic_pf_to_mgmt *pf_to_mgmt)
struct hinic_hwdev *hwdev = &pfhwdev->hwdev;

hinic_aeq_unregister_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU);
+ hinic_api_cmd_free(pf_to_mgmt->cmd_chain);
}
diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.h b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.h
index b4b34b7..dff321c 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.h
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.h
@@ -19,6 +19,7 @@
#include <linux/types.h>

#include "hinic_hw_if.h"
+#include "hinic_hw_api_cmd.h"

enum hinic_mgmt_msg_type {
HINIC_MGMT_MSG_SYNC = 1,
@@ -30,6 +31,8 @@ enum hinic_cfg_cmd {

struct hinic_pf_to_mgmt {
struct hinic_hwif *hwif;
+
+ struct hinic_api_cmd_chain *cmd_chain[HINIC_API_CMD_MAX];
};

int hinic_msg_to_mgmt(struct hinic_pf_to_mgmt *pf_to_mgmt,
--
1.9.1
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