diff options
Diffstat (limited to 'drivers/virtio/vdpa/ifcvf/ifcvf_base.c')
| -rw-r--r-- | drivers/virtio/vdpa/ifcvf/ifcvf_base.c | 389 |
1 files changed, 0 insertions, 389 deletions
diff --git a/drivers/virtio/vdpa/ifcvf/ifcvf_base.c b/drivers/virtio/vdpa/ifcvf/ifcvf_base.c deleted file mode 100644 index b61b06ea26d3..000000000000 --- a/drivers/virtio/vdpa/ifcvf/ifcvf_base.c +++ /dev/null @@ -1,389 +0,0 @@ -// 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 "ifcvf_base.h" - -static inline u8 ifc_ioread8(u8 __iomem *addr) -{ - return ioread8(addr); -} -static inline u16 ifc_ioread16 (__le16 __iomem *addr) -{ - return ioread16(addr); -} - -static inline u32 ifc_ioread32(__le32 __iomem *addr) -{ - return ioread32(addr); -} - -static inline void ifc_iowrite8(u8 value, u8 __iomem *addr) -{ - iowrite8(value, addr); -} - -static inline void ifc_iowrite16(u16 value, __le16 __iomem *addr) -{ - iowrite16(value, addr); -} - -static inline void ifc_iowrite32(u32 value, __le32 __iomem *addr) -{ - iowrite32(value, addr); -} - -static void ifc_iowrite64_twopart(u64 val, - __le32 __iomem *lo, __le32 __iomem *hi) -{ - ifc_iowrite32((u32)val, lo); - ifc_iowrite32(val >> 32, hi); -} - -struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw) -{ - return container_of(hw, struct ifcvf_adapter, vf); -} - -static void __iomem *get_cap_addr(struct ifcvf_hw *hw, - struct virtio_pci_cap *cap) -{ - struct ifcvf_adapter *ifcvf; - struct pci_dev *pdev; - u32 length, offset; - u8 bar; - - length = le32_to_cpu(cap->length); - offset = le32_to_cpu(cap->offset); - bar = cap->bar; - - ifcvf= vf_to_adapter(hw); - pdev = ifcvf->pdev; - - if (bar >= IFCVF_PCI_MAX_RESOURCE) { - IFCVF_DBG(pdev, - "Invalid bar number %u to get capabilities\n", bar); - return NULL; - } - - if (offset + length > pci_resource_len(pdev, bar)) { - IFCVF_DBG(pdev, - "offset(%u) + len(%u) overflows bar%u's capability\n", - offset, length, bar); - return NULL; - } - - return hw->base[bar] + offset; -} - -static int ifcvf_read_config_range(struct pci_dev *dev, - uint32_t *val, int size, int where) -{ - int ret, i; - - for (i = 0; i < size; i += 4) { - ret = pci_read_config_dword(dev, where + i, val + i / 4); - if (ret < 0) - return ret; - } - - return 0; -} - -int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev) -{ - struct virtio_pci_cap cap; - u16 notify_off; - int ret; - u8 pos; - u32 i; - - ret = pci_read_config_byte(pdev, PCI_CAPABILITY_LIST, &pos); - if (ret < 0) { - IFCVF_ERR(pdev, "Failed to read PCI capability list\n"); - return -EIO; - } - - while (pos) { - ret = ifcvf_read_config_range(pdev, (u32 *)&cap, - sizeof(cap), pos); - if (ret < 0) { - IFCVF_ERR(pdev, - "Failed to get PCI capability at %x\n", pos); - break; - } - - if (cap.cap_vndr != PCI_CAP_ID_VNDR) - goto next; - - switch (cap.cfg_type) { - case VIRTIO_PCI_CAP_COMMON_CFG: - hw->common_cfg = get_cap_addr(hw, &cap); - IFCVF_DBG(pdev, "hw->common_cfg = %p\n", - hw->common_cfg); - break; - case VIRTIO_PCI_CAP_NOTIFY_CFG: - pci_read_config_dword(pdev, pos + sizeof(cap), - &hw->notify_off_multiplier); - hw->notify_bar = cap.bar; - hw->notify_base = get_cap_addr(hw, &cap); - IFCVF_DBG(pdev, "hw->notify_base = %p\n", - hw->notify_base); - break; - case VIRTIO_PCI_CAP_ISR_CFG: - hw->isr = get_cap_addr(hw, &cap); - IFCVF_DBG(pdev, "hw->isr = %p\n", hw->isr); - break; - case VIRTIO_PCI_CAP_DEVICE_CFG: - hw->net_cfg = get_cap_addr(hw, &cap); - IFCVF_DBG(pdev, "hw->net_cfg = %p\n", hw->net_cfg); - break; - } - -next: - pos = cap.cap_next; - } - - if (hw->common_cfg == NULL || hw->notify_base == NULL || - hw->isr == NULL || hw->net_cfg == NULL) { - IFCVF_ERR(pdev, "Incomplete PCI capabilities\n"); - return -EIO; - } - - for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) { - ifc_iowrite16(i, &hw->common_cfg->queue_select); - notify_off = ifc_ioread16(&hw->common_cfg->queue_notify_off); - hw->vring[i].notify_addr = hw->notify_base + - notify_off * hw->notify_off_multiplier; - } - - hw->lm_cfg = hw->base[IFCVF_LM_BAR]; - - IFCVF_DBG(pdev, - "PCI capability mapping: common cfg: %p, notify base: %p\n, isr cfg: %p, device cfg: %p, multiplier: %u\n", - hw->common_cfg, hw->notify_base, hw->isr, - hw->net_cfg, hw->notify_off_multiplier); - - return 0; -} - -u8 ifcvf_get_status(struct ifcvf_hw *hw) -{ - return ifc_ioread8(&hw->common_cfg->device_status); -} - -void ifcvf_set_status(struct ifcvf_hw *hw, u8 status) -{ - ifc_iowrite8(status, &hw->common_cfg->device_status); -} - -void ifcvf_reset(struct ifcvf_hw *hw) -{ - ifcvf_set_status(hw, 0); - /* flush set_status, make sure VF is stopped, reset */ - ifcvf_get_status(hw); -} - -static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status) -{ - if (status != 0) - status |= ifcvf_get_status(hw); - - ifcvf_set_status(hw, status); - ifcvf_get_status(hw); -} - -u64 ifcvf_get_features(struct ifcvf_hw *hw) -{ - struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg; - u32 features_lo, features_hi; - - ifc_iowrite32(0, &cfg->device_feature_select); - features_lo = ifc_ioread32(&cfg->device_feature); - - ifc_iowrite32(1, &cfg->device_feature_select); - features_hi = ifc_ioread32(&cfg->device_feature); - - return ((u64)features_hi << 32) | features_lo; -} - -void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset, - void *dst, int length) -{ - u8 old_gen, new_gen, *p; - int i; - - WARN_ON(offset + length > sizeof(struct virtio_net_config)); - do { - old_gen = ifc_ioread8(&hw->common_cfg->config_generation); - p = dst; - for (i = 0; i < length; i++) - *p++ = ifc_ioread8(hw->net_cfg + offset + i); - - new_gen = ifc_ioread8(&hw->common_cfg->config_generation); - } while (old_gen != new_gen); -} - -void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset, - const void *src, int length) -{ - const u8 *p; - int i; - - p = src; - WARN_ON(offset + length > sizeof(struct virtio_net_config)); - for (i = 0; i < length; i++) - ifc_iowrite8(*p++, hw->net_cfg + offset + i); -} - -static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features) -{ - struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg; - - ifc_iowrite32(0, &cfg->guest_feature_select); - ifc_iowrite32((u32)features, &cfg->guest_feature); - - ifc_iowrite32(1, &cfg->guest_feature_select); - ifc_iowrite32(features >> 32, &cfg->guest_feature); -} - -static int ifcvf_config_features(struct ifcvf_hw *hw) -{ - struct ifcvf_adapter *ifcvf; - - ifcvf = vf_to_adapter(hw); - ifcvf_set_features(hw, hw->req_features); - ifcvf_add_status(hw, VIRTIO_CONFIG_S_FEATURES_OK); - - if (!(ifcvf_get_status(hw) & VIRTIO_CONFIG_S_FEATURES_OK)) { - IFCVF_ERR(ifcvf->pdev, "Failed to set FEATURES_OK status\n"); - return -EIO; - } - - return 0; -} - -u64 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid) -{ - struct ifcvf_lm_cfg __iomem *ifcvf_lm; - void __iomem *avail_idx_addr; - u16 last_avail_idx; - u32 q_pair_id; - - ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg; - q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2); - avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2]; - last_avail_idx = ifc_ioread16(avail_idx_addr); - - return last_avail_idx; -} - -int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u64 num) -{ - struct ifcvf_lm_cfg __iomem *ifcvf_lm; - void __iomem *avail_idx_addr; - u32 q_pair_id; - - ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg; - q_pair_id = qid / (IFCVF_MAX_QUEUE_PAIRS * 2); - avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2]; - hw->vring[qid].last_avail_idx = num; - ifc_iowrite16(num, avail_idx_addr); - - return 0; -} - -static int ifcvf_hw_enable(struct ifcvf_hw *hw) -{ - struct ifcvf_lm_cfg __iomem *ifcvf_lm; - struct virtio_pci_common_cfg __iomem *cfg; - struct ifcvf_adapter *ifcvf; - u32 i; - - ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg; - ifcvf = vf_to_adapter(hw); - cfg = hw->common_cfg; - ifc_iowrite16(IFCVF_MSI_CONFIG_OFF, &cfg->msix_config); - - if (ifc_ioread16(&cfg->msix_config) == VIRTIO_MSI_NO_VECTOR) { - IFCVF_ERR(ifcvf->pdev, "No msix vector for device config\n"); - return -EINVAL; - } - - for (i = 0; i < hw->nr_vring; i++) { - if (!hw->vring[i].ready) - break; - - ifc_iowrite16(i, &cfg->queue_select); - ifc_iowrite64_twopart(hw->vring[i].desc, &cfg->queue_desc_lo, - &cfg->queue_desc_hi); - ifc_iowrite64_twopart(hw->vring[i].avail, &cfg->queue_avail_lo, - &cfg->queue_avail_hi); - ifc_iowrite64_twopart(hw->vring[i].used, &cfg->queue_used_lo, - &cfg->queue_used_hi); - ifc_iowrite16(hw->vring[i].size, &cfg->queue_size); - ifc_iowrite16(i + IFCVF_MSI_QUEUE_OFF, &cfg->queue_msix_vector); - - if (ifc_ioread16(&cfg->queue_msix_vector) == - VIRTIO_MSI_NO_VECTOR) { - IFCVF_ERR(ifcvf->pdev, - "No msix vector for queue %u\n", i); - return -EINVAL; - } - - ifcvf_set_vq_state(hw, i, hw->vring[i].last_avail_idx); - ifc_iowrite16(1, &cfg->queue_enable); - } - - return 0; -} - -static void ifcvf_hw_disable(struct ifcvf_hw *hw) -{ - struct virtio_pci_common_cfg __iomem *cfg; - u32 i; - - cfg = hw->common_cfg; - ifc_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->msix_config); - - for (i = 0; i < hw->nr_vring; i++) { - ifc_iowrite16(i, &cfg->queue_select); - ifc_iowrite16(VIRTIO_MSI_NO_VECTOR, &cfg->queue_msix_vector); - } - - ifc_ioread16(&cfg->queue_msix_vector); -} - -int ifcvf_start_hw(struct ifcvf_hw *hw) -{ - ifcvf_reset(hw); - ifcvf_add_status(hw, VIRTIO_CONFIG_S_ACKNOWLEDGE); - ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER); - - if (ifcvf_config_features(hw) < 0) - return -EINVAL; - - if (ifcvf_hw_enable(hw) < 0) - return -EINVAL; - - ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER_OK); - - return 0; -} - -void ifcvf_stop_hw(struct ifcvf_hw *hw) -{ - ifcvf_hw_disable(hw); - ifcvf_reset(hw); -} - -void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid) -{ - ifc_iowrite16(qid, hw->vring[qid].notify_addr); -} |