Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 533 insertions, 0 deletions

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_io.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_io.c
new file mode 100644
index 000000000..8e5897669
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_io.c
@@ -0,0 +1,533 @@
+/*
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/semaphore.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/err.h>
+
+#include "hinic_hw_if.h"
+#include "hinic_hw_eqs.h"
+#include "hinic_hw_wqe.h"
+#include "hinic_hw_wq.h"
+#include "hinic_hw_cmdq.h"
+#include "hinic_hw_qp_ctxt.h"
+#include "hinic_hw_qp.h"
+#include "hinic_hw_io.h"
+
+#define CI_Q_ADDR_SIZE                  sizeof(u32)
+
+#define CI_ADDR(base_addr, q_id)        ((base_addr) + \
+					 (q_id) * CI_Q_ADDR_SIZE)
+
+#define CI_TABLE_SIZE(num_qps)          ((num_qps) * CI_Q_ADDR_SIZE)
+
+#define DB_IDX(db, db_base)             \
+	(((unsigned long)(db) - (unsigned long)(db_base)) / HINIC_DB_PAGE_SIZE)
+
+enum io_cmd {
+	IO_CMD_MODIFY_QUEUE_CTXT = 0,
+};
+
+static void init_db_area_idx(struct hinic_free_db_area *free_db_area)
+{
+	int i;
+
+	for (i = 0; i < HINIC_DB_MAX_AREAS; i++)
+		free_db_area->db_idx[i] = i;
+
+	free_db_area->alloc_pos = 0;
+	free_db_area->return_pos = HINIC_DB_MAX_AREAS;
+
+	free_db_area->num_free = HINIC_DB_MAX_AREAS;
+
+	sema_init(&free_db_area->idx_lock, 1);
+}
+
+static void __iomem *get_db_area(struct hinic_func_to_io *func_to_io)
+{
+	struct hinic_free_db_area *free_db_area = &func_to_io->free_db_area;
+	int pos, idx;
+
+	down(&free_db_area->idx_lock);
+
+	free_db_area->num_free--;
+
+	if (free_db_area->num_free < 0) {
+		free_db_area->num_free++;
+		up(&free_db_area->idx_lock);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	pos = free_db_area->alloc_pos++;
+	pos &= HINIC_DB_MAX_AREAS - 1;
+
+	idx = free_db_area->db_idx[pos];
+
+	free_db_area->db_idx[pos] = -1;
+
+	up(&free_db_area->idx_lock);
+
+	return func_to_io->db_base + idx * HINIC_DB_PAGE_SIZE;
+}
+
+static void return_db_area(struct hinic_func_to_io *func_to_io,
+			   void __iomem *db_base)
+{
+	struct hinic_free_db_area *free_db_area = &func_to_io->free_db_area;
+	int pos, idx = DB_IDX(db_base, func_to_io->db_base);
+
+	down(&free_db_area->idx_lock);
+
+	pos = free_db_area->return_pos++;
+	pos &= HINIC_DB_MAX_AREAS - 1;
+
+	free_db_area->db_idx[pos] = idx;
+
+	free_db_area->num_free++;
+
+	up(&free_db_area->idx_lock);
+}
+
+static int write_sq_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
+			  u16 num_sqs)
+{
+	struct hinic_hwif *hwif = func_to_io->hwif;
+	struct hinic_sq_ctxt_block *sq_ctxt_block;
+	struct pci_dev *pdev = hwif->pdev;
+	struct hinic_cmdq_buf cmdq_buf;
+	struct hinic_sq_ctxt *sq_ctxt;
+	struct hinic_qp *qp;
+	u64 out_param;
+	int err, i;
+
+	err = hinic_alloc_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate cmdq buf\n");
+		return err;
+	}
+
+	sq_ctxt_block = cmdq_buf.buf;
+	sq_ctxt = sq_ctxt_block->sq_ctxt;
+
+	hinic_qp_prepare_header(&sq_ctxt_block->hdr, HINIC_QP_CTXT_TYPE_SQ,
+				num_sqs, func_to_io->max_qps);
+	for (i = 0; i < num_sqs; i++) {
+		qp = &func_to_io->qps[i];
+
+		hinic_sq_prepare_ctxt(&sq_ctxt[i], &qp->sq,
+				      base_qpn + qp->q_id);
+	}
+
+	cmdq_buf.size = HINIC_SQ_CTXT_SIZE(num_sqs);
+
+	err = hinic_cmdq_direct_resp(&func_to_io->cmdqs, HINIC_MOD_L2NIC,
+				     IO_CMD_MODIFY_QUEUE_CTXT, &cmdq_buf,
+				     &out_param);
+	if ((err) || (out_param != 0)) {
+		dev_err(&pdev->dev, "Failed to set SQ ctxts\n");
+		err = -EFAULT;
+	}
+
+	hinic_free_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
+	return err;
+}
+
+static int write_rq_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
+			  u16 num_rqs)
+{
+	struct hinic_hwif *hwif = func_to_io->hwif;
+	struct hinic_rq_ctxt_block *rq_ctxt_block;
+	struct pci_dev *pdev = hwif->pdev;
+	struct hinic_cmdq_buf cmdq_buf;
+	struct hinic_rq_ctxt *rq_ctxt;
+	struct hinic_qp *qp;
+	u64 out_param;
+	int err, i;
+
+	err = hinic_alloc_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate cmdq buf\n");
+		return err;
+	}
+
+	rq_ctxt_block = cmdq_buf.buf;
+	rq_ctxt = rq_ctxt_block->rq_ctxt;
+
+	hinic_qp_prepare_header(&rq_ctxt_block->hdr, HINIC_QP_CTXT_TYPE_RQ,
+				num_rqs, func_to_io->max_qps);
+	for (i = 0; i < num_rqs; i++) {
+		qp = &func_to_io->qps[i];
+
+		hinic_rq_prepare_ctxt(&rq_ctxt[i], &qp->rq,
+				      base_qpn + qp->q_id);
+	}
+
+	cmdq_buf.size = HINIC_RQ_CTXT_SIZE(num_rqs);
+
+	err = hinic_cmdq_direct_resp(&func_to_io->cmdqs, HINIC_MOD_L2NIC,
+				     IO_CMD_MODIFY_QUEUE_CTXT, &cmdq_buf,
+				     &out_param);
+	if ((err) || (out_param != 0)) {
+		dev_err(&pdev->dev, "Failed to set RQ ctxts\n");
+		err = -EFAULT;
+	}
+
+	hinic_free_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
+	return err;
+}
+
+/**
+ * write_qp_ctxts - write the qp ctxt to HW
+ * @func_to_io: func to io channel that holds the IO components
+ * @base_qpn: first qp number
+ * @num_qps: number of qps to write
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int write_qp_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
+			  u16 num_qps)
+{
+	return (write_sq_ctxts(func_to_io, base_qpn, num_qps) ||
+		write_rq_ctxts(func_to_io, base_qpn, num_qps));
+}
+
+/**
+ * init_qp - Initialize a Queue Pair
+ * @func_to_io: func to io channel that holds the IO components
+ * @qp: pointer to the qp to initialize
+ * @q_id: the id of the qp
+ * @sq_msix_entry: msix entry for sq
+ * @rq_msix_entry: msix entry for rq
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int init_qp(struct hinic_func_to_io *func_to_io,
+		   struct hinic_qp *qp, int q_id,
+		   struct msix_entry *sq_msix_entry,
+		   struct msix_entry *rq_msix_entry)
+{
+	struct hinic_hwif *hwif = func_to_io->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	void __iomem *db_base;
+	int err;
+
+	qp->q_id = q_id;
+
+	err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->sq_wq[q_id],
+				HINIC_SQ_WQEBB_SIZE, HINIC_SQ_PAGE_SIZE,
+				HINIC_SQ_DEPTH, HINIC_SQ_WQE_MAX_SIZE);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate WQ for SQ\n");
+		return err;
+	}
+
+	err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->rq_wq[q_id],
+				HINIC_RQ_WQEBB_SIZE, HINIC_RQ_PAGE_SIZE,
+				HINIC_RQ_DEPTH, HINIC_RQ_WQE_SIZE);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate WQ for RQ\n");
+		goto err_rq_alloc;
+	}
+
+	db_base = get_db_area(func_to_io);
+	if (IS_ERR(db_base)) {
+		dev_err(&pdev->dev, "Failed to get DB area for SQ\n");
+		err = PTR_ERR(db_base);
+		goto err_get_db;
+	}
+
+	func_to_io->sq_db[q_id] = db_base;
+
+	err = hinic_init_sq(&qp->sq, hwif, &func_to_io->sq_wq[q_id],
+			    sq_msix_entry,
+			    CI_ADDR(func_to_io->ci_addr_base, q_id),
+			    CI_ADDR(func_to_io->ci_dma_base, q_id), db_base);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to init SQ\n");
+		goto err_sq_init;
+	}
+
+	err = hinic_init_rq(&qp->rq, hwif, &func_to_io->rq_wq[q_id],
+			    rq_msix_entry);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to init RQ\n");
+		goto err_rq_init;
+	}
+
+	return 0;
+
+err_rq_init:
+	hinic_clean_sq(&qp->sq);
+
+err_sq_init:
+	return_db_area(func_to_io, db_base);
+
+err_get_db:
+	hinic_wq_free(&func_to_io->wqs, &func_to_io->rq_wq[q_id]);
+
+err_rq_alloc:
+	hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
+	return err;
+}
+
+/**
+ * destroy_qp - Clean the resources of a Queue Pair
+ * @func_to_io: func to io channel that holds the IO components
+ * @qp: pointer to the qp to clean
+ **/
+static void destroy_qp(struct hinic_func_to_io *func_to_io,
+		       struct hinic_qp *qp)
+{
+	int q_id = qp->q_id;
+
+	hinic_clean_rq(&qp->rq);
+	hinic_clean_sq(&qp->sq);
+
+	return_db_area(func_to_io, func_to_io->sq_db[q_id]);
+
+	hinic_wq_free(&func_to_io->wqs, &func_to_io->rq_wq[q_id]);
+	hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
+}
+
+/**
+ * hinic_io_create_qps - Create Queue Pairs
+ * @func_to_io: func to io channel that holds the IO components
+ * @base_qpn: base qp number
+ * @num_qps: number queue pairs to create
+ * @sq_msix_entry: msix entries for sq
+ * @rq_msix_entry: msix entries for rq
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
+			u16 base_qpn, int num_qps,
+			struct msix_entry *sq_msix_entries,
+			struct msix_entry *rq_msix_entries)
+{
+	struct hinic_hwif *hwif = func_to_io->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	size_t qps_size, wq_size, db_size;
+	void *ci_addr_base;
+	int i, j, err;
+
+	qps_size = num_qps * sizeof(*func_to_io->qps);
+	func_to_io->qps = devm_kzalloc(&pdev->dev, qps_size, GFP_KERNEL);
+	if (!func_to_io->qps)
+		return -ENOMEM;
+
+	wq_size = num_qps * sizeof(*func_to_io->sq_wq);
+	func_to_io->sq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
+	if (!func_to_io->sq_wq) {
+		err = -ENOMEM;
+		goto err_sq_wq;
+	}
+
+	wq_size = num_qps * sizeof(*func_to_io->rq_wq);
+	func_to_io->rq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
+	if (!func_to_io->rq_wq) {
+		err = -ENOMEM;
+		goto err_rq_wq;
+	}
+
+	db_size = num_qps * sizeof(*func_to_io->sq_db);
+	func_to_io->sq_db = devm_kzalloc(&pdev->dev, db_size, GFP_KERNEL);
+	if (!func_to_io->sq_db) {
+		err = -ENOMEM;
+		goto err_sq_db;
+	}
+
+	ci_addr_base = dma_zalloc_coherent(&pdev->dev, CI_TABLE_SIZE(num_qps),
+					   &func_to_io->ci_dma_base,
+					   GFP_KERNEL);
+	if (!ci_addr_base) {
+		dev_err(&pdev->dev, "Failed to allocate CI area\n");
+		err = -ENOMEM;
+		goto err_ci_base;
+	}
+
+	func_to_io->ci_addr_base = ci_addr_base;
+
+	for (i = 0; i < num_qps; i++) {
+		err = init_qp(func_to_io, &func_to_io->qps[i], i,
+			      &sq_msix_entries[i], &rq_msix_entries[i]);
+		if (err) {
+			dev_err(&pdev->dev, "Failed to create QP %d\n", i);
+			goto err_init_qp;
+		}
+	}
+
+	err = write_qp_ctxts(func_to_io, base_qpn, num_qps);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to init QP ctxts\n");
+		goto err_write_qp_ctxts;
+	}
+
+	return 0;
+
+err_write_qp_ctxts:
+err_init_qp:
+	for (j = 0; j < i; j++)
+		destroy_qp(func_to_io, &func_to_io->qps[j]);
+
+	dma_free_coherent(&pdev->dev, CI_TABLE_SIZE(num_qps),
+			  func_to_io->ci_addr_base, func_to_io->ci_dma_base);
+
+err_ci_base:
+	devm_kfree(&pdev->dev, func_to_io->sq_db);
+
+err_sq_db:
+	devm_kfree(&pdev->dev, func_to_io->rq_wq);
+
+err_rq_wq:
+	devm_kfree(&pdev->dev, func_to_io->sq_wq);
+
+err_sq_wq:
+	devm_kfree(&pdev->dev, func_to_io->qps);
+	return err;
+}
+
+/**
+ * hinic_io_destroy_qps - Destroy the IO Queue Pairs
+ * @func_to_io: func to io channel that holds the IO components
+ * @num_qps: number queue pairs to destroy
+ **/
+void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io, int num_qps)
+{
+	struct hinic_hwif *hwif = func_to_io->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	size_t ci_table_size;
+	int i;
+
+	ci_table_size = CI_TABLE_SIZE(num_qps);
+
+	for (i = 0; i < num_qps; i++)
+		destroy_qp(func_to_io, &func_to_io->qps[i]);
+
+	dma_free_coherent(&pdev->dev, ci_table_size, func_to_io->ci_addr_base,
+			  func_to_io->ci_dma_base);
+
+	devm_kfree(&pdev->dev, func_to_io->sq_db);
+
+	devm_kfree(&pdev->dev, func_to_io->rq_wq);
+	devm_kfree(&pdev->dev, func_to_io->sq_wq);
+
+	devm_kfree(&pdev->dev, func_to_io->qps);
+}
+
+/**
+ * hinic_io_init - Initialize the IO components
+ * @func_to_io: func to io channel that holds the IO components
+ * @hwif: HW interface for accessing IO
+ * @max_qps: maximum QPs in HW
+ * @num_ceqs: number completion event queues
+ * @ceq_msix_entries: msix entries for ceqs
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_io_init(struct hinic_func_to_io *func_to_io,
+		  struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
+		  struct msix_entry *ceq_msix_entries)
+{
+	struct pci_dev *pdev = hwif->pdev;
+	enum hinic_cmdq_type cmdq, type;
+	void __iomem *db_area;
+	int err;
+
+	func_to_io->hwif = hwif;
+	func_to_io->qps = NULL;
+	func_to_io->max_qps = max_qps;
+
+	err = hinic_ceqs_init(&func_to_io->ceqs, hwif, num_ceqs,
+			      HINIC_DEFAULT_CEQ_LEN, HINIC_EQ_PAGE_SIZE,
+			      ceq_msix_entries);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to init CEQs\n");
+		return err;
+	}
+
+	err = hinic_wqs_alloc(&func_to_io->wqs, 2 * max_qps, hwif);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate WQS for IO\n");
+		goto err_wqs_alloc;
+	}
+
+	func_to_io->db_base = pci_ioremap_bar(pdev, HINIC_PCI_DB_BAR);
+	if (!func_to_io->db_base) {
+		dev_err(&pdev->dev, "Failed to remap IO DB area\n");
+		err = -ENOMEM;
+		goto err_db_ioremap;
+	}
+
+	init_db_area_idx(&func_to_io->free_db_area);
+
+	for (cmdq = HINIC_CMDQ_SYNC; cmdq < HINIC_MAX_CMDQ_TYPES; cmdq++) {
+		db_area = get_db_area(func_to_io);
+		if (IS_ERR(db_area)) {
+			dev_err(&pdev->dev, "Failed to get cmdq db area\n");
+			err = PTR_ERR(db_area);
+			goto err_db_area;
+		}
+
+		func_to_io->cmdq_db_area[cmdq] = db_area;
+	}
+
+	err = hinic_init_cmdqs(&func_to_io->cmdqs, hwif,
+			       func_to_io->cmdq_db_area);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize cmdqs\n");
+		goto err_init_cmdqs;
+	}
+
+	return 0;
+
+err_init_cmdqs:
+err_db_area:
+	for (type = HINIC_CMDQ_SYNC; type < cmdq; type++)
+		return_db_area(func_to_io, func_to_io->cmdq_db_area[type]);
+
+	iounmap(func_to_io->db_base);
+
+err_db_ioremap:
+	hinic_wqs_free(&func_to_io->wqs);
+
+err_wqs_alloc:
+	hinic_ceqs_free(&func_to_io->ceqs);
+	return err;
+}
+
+/**
+ * hinic_io_free - Free the IO components
+ * @func_to_io: func to io channel that holds the IO components
+ **/
+void hinic_io_free(struct hinic_func_to_io *func_to_io)
+{
+	enum hinic_cmdq_type cmdq;
+
+	hinic_free_cmdqs(&func_to_io->cmdqs);
+
+	for (cmdq = HINIC_CMDQ_SYNC; cmdq < HINIC_MAX_CMDQ_TYPES; cmdq++)
+		return_db_area(func_to_io, func_to_io->cmdq_db_area[cmdq]);
+
+	iounmap(func_to_io->db_base);
+	hinic_wqs_free(&func_to_io->wqs);
+	hinic_ceqs_free(&func_to_io->ceqs);
+}