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Date: Thu, 9 Nov 2017 10:27:14 +0200
From: Yuval Shaia <yuval.shaia@...cle.com>
To: Salil Mehta <salil.mehta@...wei.com>
Cc: davem@...emloft.net, hch@....de, yisen.zhuang@...wei.com,
lipeng321@...wei.com, mehta.salil.lnk@...il.com,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rdma@...r.kernel.org, linuxarm@...wei.com
Subject: Re: [PATCH net] net: hns3: Updates MSI/MSI-X alloc/free
APIs(depricated) to new APIs
On Wed, Nov 08, 2017 at 11:56:06AM +0000, Salil Mehta wrote:
> This patch migrates the HNS3 driver code from use of depricated PCI
> MSI/MSI-X interrupt vector allocation/free APIs to new common APIs.
>
> Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
> Suggested-by: Christoph Hellwig <hch@....de>
> ---
> .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 108 +++++++--------------
> .../ethernet/hisilicon/hns3/hns3pf/hclge_main.h | 15 ++-
> 2 files changed, 42 insertions(+), 81 deletions(-)
>
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
> index c1cdbfd..09fa068 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
> @@ -885,14 +885,14 @@ static int hclge_query_pf_resource(struct hclge_dev *hdev)
> hdev->pkt_buf_size = __le16_to_cpu(req->buf_size) << HCLGE_BUF_UNIT_S;
>
> if (hnae3_dev_roce_supported(hdev)) {
> - hdev->num_roce_msix =
> + hdev->num_roce_msi =
> hnae_get_field(__le16_to_cpu(req->pf_intr_vector_number),
> HCLGE_PF_VEC_NUM_M, HCLGE_PF_VEC_NUM_S);
>
> /* PF should have NIC vectors and Roce vectors,
> * NIC vectors are queued before Roce vectors.
> */
> - hdev->num_msi = hdev->num_roce_msix + HCLGE_ROCE_VECTOR_OFFSET;
> + hdev->num_msi = hdev->num_roce_msi + HCLGE_ROCE_VECTOR_OFFSET;
> } else {
> hdev->num_msi =
> hnae_get_field(__le16_to_cpu(req->pf_intr_vector_number),
> @@ -1835,7 +1835,7 @@ static int hclge_init_roce_base_info(struct hclge_vport *vport)
> struct hnae3_handle *roce = &vport->roce;
> struct hnae3_handle *nic = &vport->nic;
>
> - roce->rinfo.num_vectors = vport->back->num_roce_msix;
> + roce->rinfo.num_vectors = vport->back->num_roce_msi;
>
> if (vport->back->num_msi_left < vport->roce.rinfo.num_vectors ||
> vport->back->num_msi_left == 0)
> @@ -1853,67 +1853,46 @@ static int hclge_init_roce_base_info(struct hclge_vport *vport)
> return 0;
> }
>
> -static int hclge_init_msix(struct hclge_dev *hdev)
> +static int hclge_init_msi(struct hclge_dev *hdev)
> {
> struct pci_dev *pdev = hdev->pdev;
> - int ret, i;
> -
> - hdev->msix_entries = devm_kcalloc(&pdev->dev, hdev->num_msi,
> - sizeof(struct msix_entry),
> - GFP_KERNEL);
> - if (!hdev->msix_entries)
> - return -ENOMEM;
> -
> - hdev->vector_status = devm_kcalloc(&pdev->dev, hdev->num_msi,
> - sizeof(u16), GFP_KERNEL);
> - if (!hdev->vector_status)
> - return -ENOMEM;
> + int vectors;
> + int i;
>
> - for (i = 0; i < hdev->num_msi; i++) {
> - hdev->msix_entries[i].entry = i;
> - hdev->vector_status[i] = HCLGE_INVALID_VPORT;
> + vectors = pci_alloc_irq_vectors(pdev, 1, hdev->num_msi,
> + PCI_IRQ_MSI | PCI_IRQ_MSIX);
> + if (vectors < 0) {
> + dev_err(&pdev->dev, "failed to allocate MSI/MSI-X vectors %d\n",
Suggesting:
dev_err(&pdev->dev, "failed to allocate MSI/MSI-X %d vecrors, error=%d",
hdev->num_msi, vectors);
> + vectors);
> + return vectors;
> }
> + if (vectors < hdev->num_msi)
> + dev_warn(&hdev->pdev->dev,
> + "could not alloc(=%d) all requested(=%d) MSI/MSI-X\n",
Suggesting something like:
"Requested %d, allocated %d"
> + hdev->num_msi, vectors);
>
> - hdev->num_msi_left = hdev->num_msi;
> - hdev->base_msi_vector = hdev->pdev->irq;
> + hdev->num_msi = vectors;
> + hdev->num_msi_left = vectors;
> + hdev->base_msi_vector = pdev->irq;
> hdev->roce_base_vector = hdev->base_msi_vector +
> - HCLGE_ROCE_VECTOR_OFFSET;
> -
> - ret = pci_enable_msix_range(hdev->pdev, hdev->msix_entries,
> - hdev->num_msi, hdev->num_msi);
> - if (ret < 0) {
> - dev_info(&hdev->pdev->dev,
> - "MSI-X vector alloc failed: %d\n", ret);
> - return ret;
> - }
> -
> - return 0;
> -}
> -
> -static int hclge_init_msi(struct hclge_dev *hdev)
> -{
> - struct pci_dev *pdev = hdev->pdev;
> - int vectors;
> - int i;
> + HCLGE_ROCE_VECTOR_OFFSET;
Any reason for this ^^^^^^^^^^^^^^^^^^^^^^^^
>
> hdev->vector_status = devm_kcalloc(&pdev->dev, hdev->num_msi,
> sizeof(u16), GFP_KERNEL);
> - if (!hdev->vector_status)
> + if (!hdev->vector_status) {
> + pci_free_irq_vectors(pdev);
> return -ENOMEM;
> + }
>
> for (i = 0; i < hdev->num_msi; i++)
> hdev->vector_status[i] = HCLGE_INVALID_VPORT;
>
> - vectors = pci_alloc_irq_vectors(pdev, 1, hdev->num_msi, PCI_IRQ_MSI);
> - if (vectors < 0) {
> - dev_err(&pdev->dev, "MSI vectors enable failed %d\n", vectors);
> - return -EINVAL;
> + hdev->vector_irq = devm_kcalloc(&pdev->dev, hdev->num_msi,
> + sizeof(int), GFP_KERNEL);
> + if (!hdev->vector_irq) {
> + pci_free_irq_vectors(pdev);
> + return -ENOMEM;
> }
> - hdev->num_msi = vectors;
> - hdev->num_msi_left = vectors;
> - hdev->base_msi_vector = pdev->irq;
> - hdev->roce_base_vector = hdev->base_msi_vector +
> - HCLGE_ROCE_VECTOR_OFFSET;
>
> return 0;
> }
> @@ -2341,6 +2320,7 @@ static int hclge_get_vector(struct hnae3_handle *handle, u16 vector_num,
> vport->vport_id *
> HCLGE_VECTOR_VF_OFFSET;
> hdev->vector_status[i] = vport->vport_id;
> + hdev->vector_irq[i] = vector->vector;
>
> vector++;
> alloc++;
> @@ -2359,15 +2339,10 @@ static int hclge_get_vector_index(struct hclge_dev *hdev, int vector)
> {
> int i;
>
> - for (i = 0; i < hdev->num_msi; i++) {
> - if (hdev->msix_entries) {
> - if (vector == hdev->msix_entries[i].vector)
> - return i;
> - } else {
> - if (vector == (hdev->base_msi_vector + i))
> - return i;
> - }
> - }
> + for (i = 0; i < hdev->num_msi; i++)
> + if (vector == hdev->vector_irq[i])
> + return i;
> +
> return -EINVAL;
> }
>
> @@ -4072,14 +4047,7 @@ static void hclge_pci_uninit(struct hclge_dev *hdev)
> {
> struct pci_dev *pdev = hdev->pdev;
>
> - if (hdev->flag & HCLGE_FLAG_USE_MSIX) {
> - pci_disable_msix(pdev);
> - devm_kfree(&pdev->dev, hdev->msix_entries);
> - hdev->msix_entries = NULL;
> - } else {
> - pci_disable_msi(pdev);
> - }
> -
> + pci_free_irq_vectors(pdev);
> pci_clear_master(pdev);
> pci_release_mem_regions(pdev);
> pci_disable_device(pdev);
> @@ -4097,7 +4065,6 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
> goto err_hclge_dev;
> }
>
> - hdev->flag |= HCLGE_FLAG_USE_MSIX;
> hdev->pdev = pdev;
> hdev->ae_dev = ae_dev;
> ae_dev->priv = hdev;
> @@ -4126,12 +4093,9 @@ static int hclge_init_ae_dev(struct hnae3_ae_dev *ae_dev)
> return ret;
> }
>
> - if (hdev->flag & HCLGE_FLAG_USE_MSIX)
> - ret = hclge_init_msix(hdev);
> - else
> - ret = hclge_init_msi(hdev);
> + ret = hclge_init_msi(hdev);
> if (ret) {
> - dev_err(&pdev->dev, "Init msix/msi error, ret = %d.\n", ret);
> + dev_err(&pdev->dev, "Init MSI/MSI-X error, ret = %d.\n", ret);
> return ret;
> }
>
> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
> index 9fcfd93..ab87843 100644
> --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h
> @@ -400,9 +400,6 @@ struct hclge_dev {
> u16 num_tqps; /* Num task queue pairs of this PF */
> u16 num_req_vfs; /* Num VFs requested for this PF */
>
> - u16 num_roce_msix; /* Num of roce vectors for this PF */
> - int roce_base_vector;
> -
> /* Base task tqp physical id of this PF */
> u16 base_tqp_pid;
> u16 alloc_rss_size; /* Allocated RSS task queue */
> @@ -429,8 +426,10 @@ struct hclge_dev {
> u16 num_msi_left;
> u16 num_msi_used;
> u32 base_msi_vector;
> - struct msix_entry *msix_entries;
> u16 *vector_status;
> + int *vector_irq;
> + u16 num_roce_msi; /* Num of roce vectors for this PF */
> + int roce_base_vector;
>
> u16 pending_udp_bitmap;
>
> @@ -454,11 +453,9 @@ struct hclge_dev {
> struct hnae3_client *nic_client;
> struct hnae3_client *roce_client;
>
> -#define HCLGE_FLAG_USE_MSI 0x00000001
> -#define HCLGE_FLAG_USE_MSIX 0x00000002
> -#define HCLGE_FLAG_MAIN 0x00000004
> -#define HCLGE_FLAG_DCB_CAPABLE 0x00000008
> -#define HCLGE_FLAG_DCB_ENABLE 0x00000010
> +#define HCLGE_FLAG_MAIN BIT(0)
> +#define HCLGE_FLAG_DCB_CAPABLE BIT(1)
> +#define HCLGE_FLAG_DCB_ENABLE BIT(2)
> u32 flag;
>
> u32 pkt_buf_size; /* Total pf buf size for tx/rx */
> --
> 2.7.4
>
>
> --
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