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Message-ID: <e5d0951a-0247-4516-1b63-aebf9933fdaa@mellanox.com>
Date: Mon, 12 Sep 2016 21:57:38 +0300
From: Mark Bloch <markb@...lanox.com>
To: Ram Amrani <Ram.Amrani@...gic.com>, <dledford@...hat.com>,
<davem@...emloft.net>
CC: <Yuval.Mintz@...gic.com>, <Ariel.Elior@...gic.com>,
<Michal.Kalderon@...gic.com>, <rajesh.borundia@...gic.com>,
<linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>
Subject: Re: [RFC 03/11] Add support for RoCE HW init
On 12/09/2016 19:07, Ram Amrani wrote:
> Allocate and setup RoCE resources, interrupts and completion queues.
> Adds device attributes.
>
> Signed-off-by: Rajesh Borundia <rajesh.borundia@...gic.com>
> Signed-off-by: Ram Amrani <Ram.Amrani@...gic.com>
> ---
> drivers/infiniband/hw/qedr/main.c | 408 +++++++++++-
> drivers/infiniband/hw/qedr/qedr.h | 118 ++++
> drivers/infiniband/hw/qedr/qedr_hsi.h | 56 ++
> drivers/infiniband/hw/qedr/qedr_hsi_rdma.h | 96 +++
> drivers/net/ethernet/qlogic/qed/Makefile | 1 +
> drivers/net/ethernet/qlogic/qed/qed.h | 26 +-
> drivers/net/ethernet/qlogic/qed/qed_cxt.c | 6 +
> drivers/net/ethernet/qlogic/qed/qed_cxt.h | 6 +
> drivers/net/ethernet/qlogic/qed/qed_dev.c | 155 +++++
> drivers/net/ethernet/qlogic/qed/qed_main.c | 44 +-
> drivers/net/ethernet/qlogic/qed/qed_reg_addr.h | 7 +
> drivers/net/ethernet/qlogic/qed/qed_roce.c | 887 +++++++++++++++++++++++++
> drivers/net/ethernet/qlogic/qed/qed_roce.h | 117 ++++
> drivers/net/ethernet/qlogic/qed/qed_sp.h | 1 +
> drivers/net/ethernet/qlogic/qed/qed_spq.c | 8 +
> drivers/net/ethernet/qlogic/qede/qede_roce.c | 2 +-
> include/linux/qed/qed_if.h | 5 +-
> include/linux/qed/qed_roce_if.h | 345 ++++++++++
> 18 files changed, 2281 insertions(+), 7 deletions(-)
> create mode 100644 drivers/infiniband/hw/qedr/qedr_hsi.h
> create mode 100644 drivers/infiniband/hw/qedr/qedr_hsi_rdma.h
> create mode 100644 drivers/net/ethernet/qlogic/qed/qed_roce.c
> create mode 100644 drivers/net/ethernet/qlogic/qed/qed_roce.h
> create mode 100644 include/linux/qed/qed_roce_if.h
>
> diff --git a/drivers/infiniband/hw/qedr/main.c b/drivers/infiniband/hw/qedr/main.c
> index 3fe58a3..0b5274a 100644
> --- a/drivers/infiniband/hw/qedr/main.c
> +++ b/drivers/infiniband/hw/qedr/main.c
> @@ -36,6 +36,8 @@
> #include <linux/iommu.h>
> #include <net/addrconf.h>
> #include <linux/qed/qede_roce.h>
> +#include <linux/qed/qed_chain.h>
> +#include <linux/qed/qed_if.h>
> #include "qedr.h"
>
> MODULE_DESCRIPTION("QLogic 40G/100G ROCE Driver");
> @@ -80,6 +82,139 @@ static int qedr_register_device(struct qedr_dev *dev)
> return 0;
> }
>
> +/* This function allocates fast-path status block memory */
> +static int qedr_alloc_mem_sb(struct qedr_dev *dev,
> + struct qed_sb_info *sb_info, u16 sb_id)
> +{
> + struct status_block *sb_virt;
> + dma_addr_t sb_phys;
> + int rc;
> +
> + sb_virt = dma_alloc_coherent(&dev->pdev->dev,
> + sizeof(*sb_virt), &sb_phys, GFP_KERNEL);
> + if (!sb_virt) {
> + pr_err("Status block allocation failed\n");
> + return -ENOMEM;
> + }
> +
> + rc = dev->ops->common->sb_init(dev->cdev, sb_info,
> + sb_virt, sb_phys, sb_id,
> + QED_SB_TYPE_CNQ);
> + if (rc) {
> + pr_err("Status block initialization failed\n");
> + dma_free_coherent(&dev->pdev->dev, sizeof(*sb_virt),
> + sb_virt, sb_phys);
> + return rc;
> + }
> +
> + return 0;
> +}
> +
> +static void qedr_free_mem_sb(struct qedr_dev *dev,
> + struct qed_sb_info *sb_info, int sb_id)
> +{
> + if (sb_info->sb_virt) {
> + dev->ops->common->sb_release(dev->cdev, sb_info, sb_id);
> + dma_free_coherent(&dev->pdev->dev, sizeof(*sb_info->sb_virt),
> + (void *)sb_info->sb_virt, sb_info->sb_phys);
> + }
> +}
> +
> +static void qedr_free_resources(struct qedr_dev *dev)
> +{
> + int i;
> +
> + for (i = 0; i < dev->num_cnq; i++) {
> + qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
> + dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl);
> + }
> +
> + kfree(dev->cnq_array);
> + kfree(dev->sb_array);
> + kfree(dev->sgid_tbl);
> +}
> +
> +static int qedr_alloc_resources(struct qedr_dev *dev)
> +{
> + struct qedr_cnq *cnq;
> + __le16 *cons_pi;
> + u16 n_entries;
> + int i, rc;
> +
> + dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
> + QEDR_MAX_SGID, GFP_KERNEL);
> + if (!dev->sgid_tbl)
> + return -ENOMEM;
> +
> + spin_lock_init(&dev->sgid_lock);
> +
> + /* Allocate Status blocks for CNQ */
> + dev->sb_array = kcalloc(dev->num_cnq, sizeof(*dev->sb_array),
> + GFP_KERNEL);
> + if (!dev->sb_array) {
> + rc = -ENOMEM;
> + goto err1;
> + }
> +
> + dev->cnq_array = kcalloc(dev->num_cnq,
> + sizeof(*dev->cnq_array), GFP_KERNEL);
> + if (!dev->cnq_array) {
> + rc = -ENOMEM;
> + goto err2;
> + }
> +
> + dev->sb_start = dev->ops->rdma_get_start_sb(dev->cdev);
> +
> + /* Allocate CNQ PBLs */
> + n_entries = min_t(u32, QED_RDMA_MAX_CNQ_SIZE, QEDR_ROCE_MAX_CNQ_SIZE);
> + for (i = 0; i < dev->num_cnq; i++) {
> + cnq = &dev->cnq_array[i];
> +
> + rc = qedr_alloc_mem_sb(dev, &dev->sb_array[i],
> + dev->sb_start + i);
> + if (rc)
> + goto err3;
> +
> + rc = dev->ops->common->chain_alloc(dev->cdev,
> + QED_CHAIN_USE_TO_CONSUME,
> + QED_CHAIN_MODE_PBL,
> + QED_CHAIN_CNT_TYPE_U16,
> + n_entries,
> + sizeof(struct regpair *),
> + &cnq->pbl);
> + if (rc)
> + goto err4;
> +
> + cnq->dev = dev;
> + cnq->sb = &dev->sb_array[i];
> + cons_pi = dev->sb_array[i].sb_virt->pi_array;
> + cnq->hw_cons_ptr = &cons_pi[QED_ROCE_PROTOCOL_INDEX];
> + cnq->index = i;
> + sprintf(cnq->name, "qedr%d@pci:%s",
> + i, pci_name(dev->pdev));
> +
> + DP_VERBOSE(dev, QEDR_MSG_INIT, "cnq[%d].cons=%d\n",
> + i, qed_chain_get_cons_idx(&cnq->pbl));
> + }
> +
> + return 0;
> +err4:
> + qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
> + for (--i; i >= 0; i--) {
> + dev->ops->common->chain_free(dev->cdev, &dev->cnq_array[i].pbl);
> + qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
> + }
> +err3:
> + for (--i; i >= 0; i--)
> + qedr_free_mem_sb(dev, &dev->sb_array[i], dev->sb_start + i);
> + kfree(dev->cnq_array);
This doesn't seem right, going from err4 to err3 i = 0, the for loop in err3
won't do anything.
> +err2:
> + kfree(dev->sb_array);
> +err1:
> + kfree(dev->sgid_tbl);
> + return rc;
> +}
> +
Mark
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