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Message-Id: <20180801102221.5308-7-nek.in.cn@gmail.com>
Date: Wed, 1 Aug 2018 18:22:20 +0800
From: Kenneth Lee <nek.in.cn@...il.com>
To: Jonathan Corbet <corbet@....net>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S . Miller" <davem@...emloft.net>,
Joerg Roedel <joro@...tes.org>,
Alex Williamson <alex.williamson@...hat.com>,
Kenneth Lee <liguozhu@...ilicon.com>,
Hao Fang <fanghao11@...wei.com>,
Zhou Wang <wangzhou1@...ilicon.com>,
Zaibo Xu <xuzaibo@...wei.com>,
Philippe Ombredanne <pombredanne@...b.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-crypto@...r.kernel.org, iommu@...ts.linux-foundation.org,
kvm@...r.kernel.org, linux-accelerators@...ts.ozlabs.org,
Lu Baolu <baolu.lu@...ux.intel.com>,
Sanjay Kumar <sanjay.k.kumar@...el.com>
Cc: linuxarm@...wei.com
Subject: [RFC PATCH 6/7] crypto: add spimdev support to Hisilicon QM
From: Kenneth Lee <liguozhu@...ilicon.com>
The commit add spimdev support to the Hislicon QM driver, any
accelerator that use QM can share its queues to the user space.
Signed-off-by: Kenneth Lee <liguozhu@...ilicon.com>
Signed-off-by: Zhou Wang <wangzhou1@...ilicon.com>
Signed-off-by: Hao Fang <fanghao11@...wei.com>
Signed-off-by: Zaibo Xu <xuzaibo@...wei.com>
---
drivers/crypto/hisilicon/qm.c | 150 ++++++++++++++++++++++++++++++++++
drivers/crypto/hisilicon/qm.h | 12 +++
2 files changed, 162 insertions(+)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index e779bc661500..06da8387dc58 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -667,6 +667,146 @@ int hisi_qp_send(struct hisi_qp *qp, void *msg)
}
EXPORT_SYMBOL_GPL(hisi_qp_send);
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+/* mdev->supported_type_groups */
+static struct attribute *hisi_qm_type_attrs[] = {
+ VFIO_SPIMDEV_DEFAULT_MDEV_TYPE_ATTRS,
+ NULL,
+};
+static struct attribute_group hisi_qm_type_group = {
+ .attrs = hisi_qm_type_attrs,
+};
+static struct attribute_group *mdev_type_groups[] = {
+ &hisi_qm_type_group,
+ NULL,
+};
+
+static void qm_qp_event_notifier(struct hisi_qp *qp)
+{
+ vfio_spimdev_wake_up(qp->spimdev_q);
+}
+
+static int hisi_qm_get_queue(struct vfio_spimdev *spimdev, unsigned long arg,
+ struct vfio_spimdev_queue **q)
+{
+ struct qm_info *qm = spimdev->priv;
+ struct hisi_qp *qp = NULL;
+ struct vfio_spimdev_queue *wd_q;
+ u8 alg_type = 0; /* fix me here */
+ int ret;
+ int pasid = arg;
+
+ qp = hisi_qm_create_qp(qm, alg_type);
+ if (IS_ERR(qp))
+ return PTR_ERR(qp);
+
+ wd_q = kzalloc(sizeof(struct vfio_spimdev_queue), GFP_KERNEL);
+ if (!wd_q) {
+ ret = -ENOMEM;
+ goto err_with_qp;
+ }
+
+ wd_q->priv = qp;
+ wd_q->spimdev = spimdev;
+ wd_q->qid = (u16)ret;
+ *q = wd_q;
+ qp->spimdev_q = wd_q;
+ qp->event_cb = qm_qp_event_notifier;
+
+ ret = hisi_qm_start_qp(qp, arg);
+ if (ret < 0)
+ goto err_with_wd_q;
+
+ return ret;
+
+err_with_wd_q:
+ kfree(wd_q);
+err_with_qp:
+ hisi_qm_release_qp(qp);
+ return ret;
+}
+
+static int hisi_qm_put_queue(struct vfio_spimdev_queue *q)
+{
+ struct hisi_qp *qp = q->priv;
+
+ /* need to stop hardware, but can not support in v1 */
+ hisi_qm_release_qp(qp);
+ kfree(q);
+ return 0;
+}
+
+/* map sq/cq/doorbell to user space */
+static int hisi_qm_mmap(struct vfio_spimdev_queue *q,
+ struct vm_area_struct *vma)
+{
+ struct hisi_qp *qp = (struct hisi_qp *)q->priv;
+ struct qm_info *qm = qp->qm;
+ struct device *dev = &qm->pdev->dev;
+ size_t sz = vma->vm_end - vma->vm_start;
+ u8 region;
+
+ vma->vm_flags |= (VM_IO | VM_LOCKED | VM_DONTEXPAND | VM_DONTDUMP);
+ region = _VFIO_SPIMDEV_REGION(vma->vm_pgoff);
+
+ switch (region) {
+ case 0:
+ if (sz > PAGE_SIZE)
+ return -EINVAL;
+ /*
+ * Warning: This is not safe as multiple queues use the same
+ * doorbell, v1 hardware interface problem. v2 will fix it
+ */
+ return remap_pfn_range(vma, vma->vm_start,
+ qm->phys_base >> PAGE_SHIFT,
+ sz, pgprot_noncached(vma->vm_page_prot));
+ case 1:
+ vma->vm_pgoff = 0;
+ if (sz > qp->scqe.size)
+ return -EINVAL;
+
+ return dma_mmap_coherent(dev, vma, qp->scqe.addr, qp->scqe.dma,
+ sz);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct vfio_spimdev_ops qm_ops = {
+ .get_queue = hisi_qm_get_queue,
+ .put_queue = hisi_qm_put_queue,
+ .mmap = hisi_qm_mmap,
+};
+
+static int qm_register_spimdev(struct qm_info *qm)
+{
+ struct pci_dev *pdev = qm->pdev;
+ struct vfio_spimdev *spimdev = &qm->spimdev;
+
+ spimdev->iommu_type = VFIO_TYPE1_IOMMU;
+#ifdef CONFIG_IOMMU_SVA
+ spimdev->dma_flag = VFIO_SPIMDEV_DMA_MULTI_PROC_MAP;
+#else
+ spimdev->dma_flag = VFIO_SPIMDEV_DMA_SINGLE_PROC_MAP;
+#endif
+ spimdev->owner = THIS_MODULE;
+ spimdev->name = qm->dev_name;
+ spimdev->dev = &pdev->dev;
+ spimdev->is_vf = pdev->is_virtfn;
+ spimdev->priv = qm;
+ spimdev->api_ver = "hisi_qm_v1";
+ spimdev->flags = 0;
+
+ spimdev->mdev_fops.mdev_attr_groups = qm->mdev_dev_groups;
+ hisi_qm_type_group.name = qm->dev_name;
+ spimdev->mdev_fops.supported_type_groups = mdev_type_groups;
+ spimdev->ops = &qm_ops;
+
+ return vfio_spimdev_register(spimdev);
+}
+#endif
+
int hisi_qm_init(const char *dev_name, struct qm_info *qm)
{
int ret;
@@ -804,6 +944,12 @@ int hisi_qm_start(struct qm_info *qm)
if (ret)
goto err_with_cqc;
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+ ret = qm_register_spimdev(qm);
+ if (ret)
+ goto err_with_irq;
+#endif
+
writel(0x0, QM_ADDR(qm, QM_VF_EQ_INT_MASK));
return 0;
@@ -830,6 +976,10 @@ void hisi_qm_stop(struct qm_info *qm)
struct pci_dev *pdev = qm->pdev;
struct device *dev = &pdev->dev;
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+ vfio_spimdev_unregister(&qm->spimdev);
+#endif
+
free_irq(pci_irq_vector(pdev, 0), qm);
qm_uninit_q_buffer(dev, &qm->cqc);
kfree(qm->qp_array);
diff --git a/drivers/crypto/hisilicon/qm.h b/drivers/crypto/hisilicon/qm.h
index b3c5c34a0d13..f73c08098b82 100644
--- a/drivers/crypto/hisilicon/qm.h
+++ b/drivers/crypto/hisilicon/qm.h
@@ -8,6 +8,10 @@
#include <linux/pci.h>
#include <linux/slab.h>
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+#include <linux/vfio_spimdev.h>
+#endif
+
#define QM_CQE_SIZE 16
/* default queue depth for sq/cq/eq */
#define QM_Q_DEPTH 1024
@@ -59,6 +63,10 @@ struct qm_info {
struct hisi_acc_qm_hw_ops *ops;
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+ struct vfio_spimdev spimdev;
+ const struct attribute_group **mdev_dev_groups;
+#endif
};
#define QM_ADDR(qm, off) ((qm)->io_base + off)
@@ -90,6 +98,10 @@ struct hisi_qp {
struct qm_info *qm;
+#ifdef CONFIG_CRYPTO_DEV_HISI_SPIMDEV
+ struct vfio_spimdev_queue *spimdev_q;
+#endif
+
/* for crypto sync API */
struct completion completion;
--
2.17.1
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