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path: root/drivers/vdpa/ifcvf/ifcvf_main.c
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-rw-r--r--drivers/vdpa/ifcvf/ifcvf_main.c882
1 files changed, 882 insertions, 0 deletions
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
new file mode 100644
index 000000000..e98fa8100
--- /dev/null
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -0,0 +1,882 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel IFC VF NIC driver for virtio dataplane offloading
+ *
+ * Copyright (C) 2020 Intel Corporation.
+ *
+ * Author: Zhu Lingshan <lingshan.zhu@intel.com>
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/sysfs.h>
+#include "ifcvf_base.h"
+
+#define DRIVER_AUTHOR "Intel Corporation"
+#define IFCVF_DRIVER_NAME "ifcvf"
+
+static irqreturn_t ifcvf_config_changed(int irq, void *arg)
+{
+ struct ifcvf_hw *vf = arg;
+
+ if (vf->config_cb.callback)
+ return vf->config_cb.callback(vf->config_cb.private);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_vq_intr_handler(int irq, void *arg)
+{
+ struct vring_info *vring = arg;
+
+ if (vring->cb.callback)
+ return vring->cb.callback(vring->cb.private);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_vqs_reused_intr_handler(int irq, void *arg)
+{
+ struct ifcvf_hw *vf = arg;
+ struct vring_info *vring;
+ int i;
+
+ for (i = 0; i < vf->nr_vring; i++) {
+ vring = &vf->vring[i];
+ if (vring->cb.callback)
+ vring->cb.callback(vring->cb.private);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_dev_intr_handler(int irq, void *arg)
+{
+ struct ifcvf_hw *vf = arg;
+ u8 isr;
+
+ isr = vp_ioread8(vf->isr);
+ if (isr & VIRTIO_PCI_ISR_CONFIG)
+ ifcvf_config_changed(irq, arg);
+
+ return ifcvf_vqs_reused_intr_handler(irq, arg);
+}
+
+static void ifcvf_free_irq_vectors(void *data)
+{
+ pci_free_irq_vectors(data);
+}
+
+static void ifcvf_free_per_vq_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int i;
+
+ for (i = 0; i < vf->nr_vring; i++) {
+ if (vf->vring[i].irq != -EINVAL) {
+ devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
+ vf->vring[i].irq = -EINVAL;
+ }
+ }
+}
+
+static void ifcvf_free_vqs_reused_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+
+ if (vf->vqs_reused_irq != -EINVAL) {
+ devm_free_irq(&pdev->dev, vf->vqs_reused_irq, vf);
+ vf->vqs_reused_irq = -EINVAL;
+ }
+
+}
+
+static void ifcvf_free_vq_irq(struct ifcvf_hw *vf)
+{
+ if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+ ifcvf_free_per_vq_irq(vf);
+ else
+ ifcvf_free_vqs_reused_irq(vf);
+}
+
+static void ifcvf_free_config_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+
+ if (vf->config_irq == -EINVAL)
+ return;
+
+ /* If the irq is shared by all vqs and the config interrupt,
+ * it is already freed in ifcvf_free_vq_irq, so here only
+ * need to free config irq when msix_vector_status != MSIX_VECTOR_DEV_SHARED
+ */
+ if (vf->msix_vector_status != MSIX_VECTOR_DEV_SHARED) {
+ devm_free_irq(&pdev->dev, vf->config_irq, vf);
+ vf->config_irq = -EINVAL;
+ }
+}
+
+static void ifcvf_free_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+
+ ifcvf_free_vq_irq(vf);
+ ifcvf_free_config_irq(vf);
+ ifcvf_free_irq_vectors(pdev);
+ vf->num_msix_vectors = 0;
+}
+
+/* ifcvf MSIX vectors allocator, this helper tries to allocate
+ * vectors for all virtqueues and the config interrupt.
+ * It returns the number of allocated vectors, negative
+ * return value when fails.
+ */
+static int ifcvf_alloc_vectors(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int max_intr, ret;
+
+ /* all queues and config interrupt */
+ max_intr = vf->nr_vring + 1;
+ ret = pci_alloc_irq_vectors(pdev, 1, max_intr, PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
+
+ if (ret < 0) {
+ IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
+ return ret;
+ }
+
+ if (ret < max_intr)
+ IFCVF_INFO(pdev,
+ "Requested %u vectors, however only %u allocated, lower performance\n",
+ max_intr, ret);
+
+ return ret;
+}
+
+static int ifcvf_request_per_vq_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int i, vector, ret, irq;
+
+ vf->vqs_reused_irq = -EINVAL;
+ for (i = 0; i < vf->nr_vring; i++) {
+ snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n", pci_name(pdev), i);
+ vector = i;
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_vq_intr_handler, 0,
+ vf->vring[i].msix_name,
+ &vf->vring[i]);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request irq for vq %d\n", i);
+ goto err;
+ }
+
+ vf->vring[i].irq = irq;
+ ret = ifcvf_set_vq_vector(vf, i, vector);
+ if (ret == VIRTIO_MSI_NO_VECTOR) {
+ IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ ifcvf_free_irq(vf);
+
+ return -EFAULT;
+}
+
+static int ifcvf_request_vqs_reused_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int i, vector, ret, irq;
+
+ vector = 0;
+ snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-vqs-reused-irq\n", pci_name(pdev));
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_vqs_reused_intr_handler, 0,
+ vf->vring[0].msix_name, vf);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request reused irq for the device\n");
+ goto err;
+ }
+
+ vf->vqs_reused_irq = irq;
+ for (i = 0; i < vf->nr_vring; i++) {
+ vf->vring[i].irq = -EINVAL;
+ ret = ifcvf_set_vq_vector(vf, i, vector);
+ if (ret == VIRTIO_MSI_NO_VECTOR) {
+ IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ ifcvf_free_irq(vf);
+
+ return -EFAULT;
+}
+
+static int ifcvf_request_dev_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int i, vector, ret, irq;
+
+ vector = 0;
+ snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-dev-irq\n", pci_name(pdev));
+ irq = pci_irq_vector(pdev, vector);
+ ret = devm_request_irq(&pdev->dev, irq,
+ ifcvf_dev_intr_handler, 0,
+ vf->vring[0].msix_name, vf);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request irq for the device\n");
+ goto err;
+ }
+
+ vf->vqs_reused_irq = irq;
+ for (i = 0; i < vf->nr_vring; i++) {
+ vf->vring[i].irq = -EINVAL;
+ ret = ifcvf_set_vq_vector(vf, i, vector);
+ if (ret == VIRTIO_MSI_NO_VECTOR) {
+ IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+ goto err;
+ }
+ }
+
+ vf->config_irq = irq;
+ ret = ifcvf_set_config_vector(vf, vector);
+ if (ret == VIRTIO_MSI_NO_VECTOR) {
+ IFCVF_ERR(pdev, "No msix vector for device config\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ ifcvf_free_irq(vf);
+
+ return -EFAULT;
+
+}
+
+static int ifcvf_request_vq_irq(struct ifcvf_hw *vf)
+{
+ int ret;
+
+ if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+ ret = ifcvf_request_per_vq_irq(vf);
+ else
+ ret = ifcvf_request_vqs_reused_irq(vf);
+
+ return ret;
+}
+
+static int ifcvf_request_config_irq(struct ifcvf_hw *vf)
+{
+ struct pci_dev *pdev = vf->pdev;
+ int config_vector, ret;
+
+ if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+ config_vector = vf->nr_vring;
+ else if (vf->msix_vector_status == MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
+ /* vector 0 for vqs and 1 for config interrupt */
+ config_vector = 1;
+ else if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
+ /* re-use the vqs vector */
+ return 0;
+ else
+ return -EINVAL;
+
+ snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
+ pci_name(pdev));
+ vf->config_irq = pci_irq_vector(pdev, config_vector);
+ ret = devm_request_irq(&pdev->dev, vf->config_irq,
+ ifcvf_config_changed, 0,
+ vf->config_msix_name, vf);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request config irq\n");
+ goto err;
+ }
+
+ ret = ifcvf_set_config_vector(vf, config_vector);
+ if (ret == VIRTIO_MSI_NO_VECTOR) {
+ IFCVF_ERR(pdev, "No msix vector for device config\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ ifcvf_free_irq(vf);
+
+ return -EFAULT;
+}
+
+static int ifcvf_request_irq(struct ifcvf_hw *vf)
+{
+ int nvectors, ret, max_intr;
+
+ nvectors = ifcvf_alloc_vectors(vf);
+ if (nvectors <= 0)
+ return -EFAULT;
+
+ vf->msix_vector_status = MSIX_VECTOR_PER_VQ_AND_CONFIG;
+ max_intr = vf->nr_vring + 1;
+ if (nvectors < max_intr)
+ vf->msix_vector_status = MSIX_VECTOR_SHARED_VQ_AND_CONFIG;
+
+ if (nvectors == 1) {
+ vf->msix_vector_status = MSIX_VECTOR_DEV_SHARED;
+ ret = ifcvf_request_dev_irq(vf);
+
+ return ret;
+ }
+
+ ret = ifcvf_request_vq_irq(vf);
+ if (ret)
+ return ret;
+
+ ret = ifcvf_request_config_irq(vf);
+
+ if (ret)
+ return ret;
+
+ vf->num_msix_vectors = nvectors;
+
+ return 0;
+}
+
+static struct ifcvf_adapter *vdpa_to_adapter(struct vdpa_device *vdpa_dev)
+{
+ return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
+}
+
+static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+
+ return adapter->vf;
+}
+
+static u64 ifcvf_vdpa_get_device_features(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ struct pci_dev *pdev = adapter->pdev;
+ u32 type = vf->dev_type;
+ u64 features;
+
+ if (type == VIRTIO_ID_NET || type == VIRTIO_ID_BLOCK)
+ features = ifcvf_get_dev_features(vf);
+ else {
+ features = 0;
+ IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
+ }
+
+ return features;
+}
+
+static int ifcvf_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 features)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ int ret;
+
+ ret = ifcvf_verify_min_features(vf, features);
+ if (ret)
+ return ret;
+
+ ifcvf_set_driver_features(vf, features);
+
+ return 0;
+}
+
+static u64 ifcvf_vdpa_get_driver_features(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ u64 features;
+
+ features = ifcvf_get_driver_features(vf);
+
+ return features;
+}
+
+static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return ifcvf_get_status(vf);
+}
+
+static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
+{
+ struct ifcvf_hw *vf;
+ u8 status_old;
+ int ret;
+
+ vf = vdpa_to_vf(vdpa_dev);
+ status_old = ifcvf_get_status(vf);
+
+ if (status_old == status)
+ return;
+
+ if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
+ !(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ ret = ifcvf_request_irq(vf);
+ if (ret) {
+ IFCVF_ERR(vf->pdev, "failed to request irq with error %d\n", ret);
+ return;
+ }
+ }
+
+ ifcvf_set_status(vf, status);
+}
+
+static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ u8 status = ifcvf_get_status(vf);
+
+ ifcvf_stop(vf);
+
+ if (status & VIRTIO_CONFIG_S_DRIVER_OK)
+ ifcvf_free_irq(vf);
+
+ ifcvf_reset(vf);
+
+ return 0;
+}
+
+static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return ifcvf_get_max_vq_size(vf);
+}
+
+static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+ struct vdpa_vq_state *state)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ state->split.avail_index = ifcvf_get_vq_state(vf, qid);
+ return 0;
+}
+
+static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+ const struct vdpa_vq_state *state)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return ifcvf_set_vq_state(vf, qid, state->split.avail_index);
+}
+
+static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
+ struct vdpa_callback *cb)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ vf->vring[qid].cb = *cb;
+}
+
+static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
+ u16 qid, bool ready)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ ifcvf_set_vq_ready(vf, qid, ready);
+}
+
+static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return ifcvf_get_vq_ready(vf, qid);
+}
+
+static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
+ u32 num)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ ifcvf_set_vq_num(vf, qid, num);
+}
+
+static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
+ u64 desc_area, u64 driver_area,
+ u64 device_area)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return ifcvf_set_vq_address(vf, qid, desc_area, driver_area, device_area);
+}
+
+static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ ifcvf_notify_queue(vf, qid);
+}
+
+static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return vp_ioread8(&vf->common_cfg->config_generation);
+}
+
+static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return vf->dev_type;
+}
+
+static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+ struct pci_dev *pdev = adapter->pdev;
+
+ return pdev->subsystem_vendor;
+}
+
+static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
+{
+ return IFCVF_QUEUE_ALIGNMENT;
+}
+
+static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ return vf->config_size;
+}
+
+static u32 ifcvf_vdpa_get_vq_group(struct vdpa_device *vdpa, u16 idx)
+{
+ return 0;
+}
+
+static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
+ unsigned int offset,
+ void *buf, unsigned int len)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ ifcvf_read_dev_config(vf, offset, buf, len);
+}
+
+static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
+ unsigned int offset, const void *buf,
+ unsigned int len)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ ifcvf_write_dev_config(vf, offset, buf, len);
+}
+
+static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
+ struct vdpa_callback *cb)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ vf->config_cb.callback = cb->callback;
+ vf->config_cb.private = cb->private;
+}
+
+static int ifcvf_vdpa_get_vq_irq(struct vdpa_device *vdpa_dev,
+ u16 qid)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+ if (vf->vqs_reused_irq < 0)
+ return vf->vring[qid].irq;
+ else
+ return -EINVAL;
+}
+
+static struct vdpa_notification_area ifcvf_get_vq_notification(struct vdpa_device *vdpa_dev,
+ u16 idx)
+{
+ struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+ struct vdpa_notification_area area;
+
+ area.addr = vf->vring[idx].notify_pa;
+ if (!vf->notify_off_multiplier)
+ area.size = PAGE_SIZE;
+ else
+ area.size = vf->notify_off_multiplier;
+
+ return area;
+}
+
+/*
+ * IFCVF currently doesn't have on-chip IOMMU, so not
+ * implemented set_map()/dma_map()/dma_unmap()
+ */
+static const struct vdpa_config_ops ifc_vdpa_ops = {
+ .get_device_features = ifcvf_vdpa_get_device_features,
+ .set_driver_features = ifcvf_vdpa_set_driver_features,
+ .get_driver_features = ifcvf_vdpa_get_driver_features,
+ .get_status = ifcvf_vdpa_get_status,
+ .set_status = ifcvf_vdpa_set_status,
+ .reset = ifcvf_vdpa_reset,
+ .get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
+ .get_vq_state = ifcvf_vdpa_get_vq_state,
+ .set_vq_state = ifcvf_vdpa_set_vq_state,
+ .set_vq_cb = ifcvf_vdpa_set_vq_cb,
+ .set_vq_ready = ifcvf_vdpa_set_vq_ready,
+ .get_vq_ready = ifcvf_vdpa_get_vq_ready,
+ .set_vq_num = ifcvf_vdpa_set_vq_num,
+ .set_vq_address = ifcvf_vdpa_set_vq_address,
+ .get_vq_irq = ifcvf_vdpa_get_vq_irq,
+ .kick_vq = ifcvf_vdpa_kick_vq,
+ .get_generation = ifcvf_vdpa_get_generation,
+ .get_device_id = ifcvf_vdpa_get_device_id,
+ .get_vendor_id = ifcvf_vdpa_get_vendor_id,
+ .get_vq_align = ifcvf_vdpa_get_vq_align,
+ .get_vq_group = ifcvf_vdpa_get_vq_group,
+ .get_config_size = ifcvf_vdpa_get_config_size,
+ .get_config = ifcvf_vdpa_get_config,
+ .set_config = ifcvf_vdpa_set_config,
+ .set_config_cb = ifcvf_vdpa_set_config_cb,
+ .get_vq_notification = ifcvf_get_vq_notification,
+};
+
+static struct virtio_device_id id_table_net[] = {
+ {VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID},
+ {0},
+};
+
+static struct virtio_device_id id_table_blk[] = {
+ {VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID},
+ {0},
+};
+
+static u32 get_dev_type(struct pci_dev *pdev)
+{
+ u32 dev_type;
+
+ /* This drirver drives both modern virtio devices and transitional
+ * devices in modern mode.
+ * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
+ * so legacy devices and transitional devices in legacy
+ * mode will not work for vDPA, this driver will not
+ * drive devices with legacy interface.
+ */
+
+ if (pdev->device < 0x1040)
+ dev_type = pdev->subsystem_device;
+ else
+ dev_type = pdev->device - 0x1040;
+
+ return dev_type;
+}
+
+static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
+ const struct vdpa_dev_set_config *config)
+{
+ struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+ struct ifcvf_adapter *adapter;
+ struct vdpa_device *vdpa_dev;
+ struct pci_dev *pdev;
+ struct ifcvf_hw *vf;
+ u64 device_features;
+ int ret;
+
+ ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
+ vf = &ifcvf_mgmt_dev->vf;
+ pdev = vf->pdev;
+ adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
+ &pdev->dev, &ifc_vdpa_ops, 1, 1, NULL, false);
+ if (IS_ERR(adapter)) {
+ IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
+ return PTR_ERR(adapter);
+ }
+
+ ifcvf_mgmt_dev->adapter = adapter;
+ adapter->pdev = pdev;
+ adapter->vdpa.dma_dev = &pdev->dev;
+ adapter->vdpa.mdev = mdev;
+ adapter->vf = vf;
+ vdpa_dev = &adapter->vdpa;
+
+ device_features = vf->hw_features;
+ if (config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
+ if (config->device_features & ~device_features) {
+ IFCVF_ERR(pdev, "The provisioned features 0x%llx are not supported by this device with features 0x%llx\n",
+ config->device_features, device_features);
+ return -EINVAL;
+ }
+ device_features &= config->device_features;
+ }
+ vf->dev_features = device_features;
+
+ if (name)
+ ret = dev_set_name(&vdpa_dev->dev, "%s", name);
+ else
+ ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);
+
+ ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
+ if (ret) {
+ put_device(&adapter->vdpa.dev);
+ IFCVF_ERR(pdev, "Failed to register to vDPA bus");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ifcvf_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
+{
+ struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+
+ ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
+ _vdpa_unregister_device(dev);
+ ifcvf_mgmt_dev->adapter = NULL;
+}
+
+static const struct vdpa_mgmtdev_ops ifcvf_vdpa_mgmt_dev_ops = {
+ .dev_add = ifcvf_vdpa_dev_add,
+ .dev_del = ifcvf_vdpa_dev_del
+};
+
+static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+ struct device *dev = &pdev->dev;
+ struct ifcvf_hw *vf;
+ u32 dev_type;
+ int ret, i;
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to enable device\n");
+ return ret;
+ }
+ ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
+ IFCVF_DRIVER_NAME);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to request MMIO region\n");
+ return ret;
+ }
+
+ ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+ if (ret) {
+ IFCVF_ERR(pdev, "No usable DMA configuration\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
+ if (ret) {
+ IFCVF_ERR(pdev,
+ "Failed for adding devres for freeing irq vectors\n");
+ return ret;
+ }
+
+ pci_set_master(pdev);
+ ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
+ if (!ifcvf_mgmt_dev) {
+ IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
+ return -ENOMEM;
+ }
+
+ vf = &ifcvf_mgmt_dev->vf;
+ vf->dev_type = get_dev_type(pdev);
+ vf->base = pcim_iomap_table(pdev);
+ vf->pdev = pdev;
+
+ ret = ifcvf_init_hw(vf, pdev);
+ if (ret) {
+ IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
+ goto err;
+ }
+
+ for (i = 0; i < vf->nr_vring; i++)
+ vf->vring[i].irq = -EINVAL;
+
+ vf->hw_features = ifcvf_get_hw_features(vf);
+ vf->config_size = ifcvf_get_config_size(vf);
+
+ dev_type = get_dev_type(pdev);
+ switch (dev_type) {
+ case VIRTIO_ID_NET:
+ ifcvf_mgmt_dev->mdev.id_table = id_table_net;
+ break;
+ case VIRTIO_ID_BLOCK:
+ ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
+ break;
+ default:
+ IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
+ ret = -EOPNOTSUPP;
+ goto err;
+ }
+
+ ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
+ ifcvf_mgmt_dev->mdev.device = dev;
+ ifcvf_mgmt_dev->mdev.max_supported_vqs = vf->nr_vring;
+ ifcvf_mgmt_dev->mdev.supported_features = vf->hw_features;
+ ifcvf_mgmt_dev->mdev.config_attr_mask = (1 << VDPA_ATTR_DEV_FEATURES);
+
+ ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
+ if (ret) {
+ IFCVF_ERR(pdev,
+ "Failed to initialize the management interfaces\n");
+ goto err;
+ }
+
+ pci_set_drvdata(pdev, ifcvf_mgmt_dev);
+
+ return 0;
+
+err:
+ kfree(ifcvf_mgmt_dev->vf.vring);
+ kfree(ifcvf_mgmt_dev);
+ return ret;
+}
+
+static void ifcvf_remove(struct pci_dev *pdev)
+{
+ struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+
+ ifcvf_mgmt_dev = pci_get_drvdata(pdev);
+ vdpa_mgmtdev_unregister(&ifcvf_mgmt_dev->mdev);
+ kfree(ifcvf_mgmt_dev->vf.vring);
+ kfree(ifcvf_mgmt_dev);
+}
+
+static struct pci_device_id ifcvf_pci_ids[] = {
+ /* N3000 network device */
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+ N3000_DEVICE_ID,
+ PCI_VENDOR_ID_INTEL,
+ N3000_SUBSYS_DEVICE_ID) },
+ /* C5000X-PL network device
+ * F2000X-PL network device
+ */
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+ VIRTIO_TRANS_ID_NET,
+ PCI_VENDOR_ID_INTEL,
+ VIRTIO_ID_NET) },
+ /* C5000X-PL block device */
+ { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+ VIRTIO_TRANS_ID_BLOCK,
+ PCI_VENDOR_ID_INTEL,
+ VIRTIO_ID_BLOCK) },
+
+ { 0 },
+};
+MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
+
+static struct pci_driver ifcvf_driver = {
+ .name = IFCVF_DRIVER_NAME,
+ .id_table = ifcvf_pci_ids,
+ .probe = ifcvf_probe,
+ .remove = ifcvf_remove,
+};
+
+module_pci_driver(ifcvf_driver);
+
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 09:37:40 +0000