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From: Chenbo Xia <chenbo.xia@intel.com>
To: dev@dpdk.org,
thomas@monjalon.net,
david.marchand@redhat.com
Cc: stephen@networkplumber.org, cunming.liang@intel.com, xiuchun.lu@intel.com,
miao.li@intel.com, jingjing.wu@intel.com, beilei.xing@intel.com
Date: Thu, 14 Jan 2021 14:14:09 +0800
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<20210114061411.39166-1-chenbo.xia@intel.com>
Subject: [dpdk-dev] [PATCH v2 7/9] vfio_user: add client APIs of
DMA/IRQ/region
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This patch introduces nine APIs
- Device related:
rte_vfio_user_get_dev_info and rte_vfio_user_reset
- DMA related:
rte_vfio_user_dma_map/unmap
- Region related:
rte_vfio_user_get_reg_info and rte_vfio_user_region_read/write
- IRQ related:
rte_vfio_user_get_irq_info and rte_vfio_user_set_irqs
Signed-off-by: Chenbo Xia <chenbo.xia@intel.com>
Signed-off-by: Xiuchun Lu <xiuchun.lu@intel.com>
---
lib/librte_vfio_user/rte_vfio_user.h | 177 ++++++++++
lib/librte_vfio_user/version.map | 9 +
lib/librte_vfio_user/vfio_user_client.c | 419 ++++++++++++++++++++++++
3 files changed, 605 insertions(+)
diff --git a/lib/librte_vfio_user/rte_vfio_user.h b/lib/librte_vfio_user/rte_vfio_user.h
index adafa552e2..e5fedcff90 100644
--- a/lib/librte_vfio_user/rte_vfio_user.h
+++ b/lib/librte_vfio_user/rte_vfio_user.h
@@ -238,6 +238,15 @@ rte_vfio_user_set_irq_info(const char *sock_addr,
* Below APIs are for vfio-user client (device consumer) to use:
* *rte_vfio_user_attach_dev
* *rte_vfio_user_detach_dev
+ * *rte_vfio_user_get_dev_info
+ * *rte_vfio_user_get_reg_info
+ * *rte_vfio_user_get_irq_info
+ * *rte_vfio_user_dma_map
+ * *rte_vfio_user_dma_unmap
+ * *rte_vfio_user_set_irqs
+ * *rte_vfio_user_region_read
+ * *rte_vfio_user_region_write
+ * *rte_vfio_user_reset
*/
/**
@@ -266,4 +275,172 @@ __rte_experimental
int
rte_vfio_user_detach_dev(int dev_id);
+/**
+ * Get device information of a vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param[out] info
+ * A pointer to a structure of type *vfio_device_info* to be filled with the
+ * information of the device.
+ * @return
+ * - 0: Success, device information updated
+ * - <0: Failure on get device information
+ */
+__rte_experimental
+int
+rte_vfio_user_get_dev_info(int dev_id, struct vfio_device_info *info);
+
+/**
+ * Get region information of a vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param[out] info
+ * A pointer to a structure of type *vfio_region_info* to be filled with the
+ * information of the device region.
+ * @param[out] fd
+ * A pointer to the file descriptor of the region
+ * @return
+ * - 0: Success, region information and file descriptor updated. If the region
+ * can not be mmaped, the file descriptor should be -1.
+ * - <0: Failure on get region information
+ */
+__rte_experimental
+int
+rte_vfio_user_get_reg_info(int dev_id, struct vfio_region_info *info,
+ int *fd);
+
+/**
+ * Get IRQ information of a vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param[out] info
+ * A pointer to a structure of type *vfio_irq_info* to be filled with the
+ * information of the IRQ.
+ * @return
+ * - 0: Success, IRQ information updated
+ * - <0: Failure on get IRQ information
+ */
+__rte_experimental
+int
+rte_vfio_user_get_irq_info(int dev_id, struct vfio_irq_info *info);
+
+/**
+ * Map DMA regions for the vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param mem
+ * A pointer to a structure of type *vfio_user_mem_reg* that identifies
+ * one or several DMA regions.
+ * @param fds
+ * A pointer to a list of file descriptors. One file descriptor maps to
+ * one DMA region.
+ * @param num
+ * Number of DMA regions (or file descriptors)
+ * @return
+ * - 0: Success, all DMA regions are mapped.
+ * - <0: Failure on DMA map. It should be assumed that all DMA regions
+ * are not mapped.
+ */
+__rte_experimental
+int
+rte_vfio_user_dma_map(int dev_id, struct rte_vfio_user_mem_reg *mem,
+ int *fds, uint32_t num);
+
+/**
+ * Unmap DMA regions for the vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param mem
+ * A pointer to a structure of type *vfio_user_mem_reg* that identifies
+ * one or several DMA regions.
+ * @param num
+ * Number of DMA regions
+ * @return
+ * - 0: Success, all DMA regions are unmapped.
+ * - <0: Failure on DMA unmap. It should be assumed that all DMA regions
+ * are not unmapped.
+ */
+__rte_experimental
+int
+rte_vfio_user_dma_unmap(int dev_id, struct rte_vfio_user_mem_reg *mem,
+ uint32_t num);
+
+/**
+ * Set interrupt signaling, masking, and unmasking for the vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param set
+ * A pointer to a structure of type *vfio_irq_set* that specifies the set
+ * data and action
+ * @return
+ * - 0: Success, IRQs are set successfully.
+ * - <0: Failure on IRQ set.
+ */
+__rte_experimental
+int
+rte_vfio_user_set_irqs(int dev_id, struct vfio_irq_set *set);
+
+/**
+ * Read region of the vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param idx
+ * The region index
+ * @param offset
+ * The region offset
+ * @param size
+ * Size of the read data
+ * @param[out] data
+ * The pointer to data to be filled with correct region data
+ * @return
+ * - 0: Success on region read
+ * - <0: Failure on region read
+ */
+__rte_experimental
+int
+rte_vfio_user_region_read(int dev_id, uint32_t idx, uint64_t offset,
+ uint32_t size, void *data);
+
+/**
+ * Write region of the vfio-user device.
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @param idx
+ * The region index
+ * @param offset
+ * The region offset
+ * @param size
+ * Size of the read data
+ * @param data
+ * The pointer to data that will be written to the region
+ * @return
+ * - 0: Success on region write
+ * - <0: Failure on region write
+ */
+__rte_experimental
+int
+rte_vfio_user_region_write(int dev_id, uint32_t idx, uint64_t offset,
+ uint32_t size, const void *data);
+
+/**
+ * Reset the vfio-user device
+ *
+ * @param dev_id
+ * Device ID of the vfio-user device
+ * @return
+ * - 0: Success on device reset
+ * - <0: Failure on device reset
+ */
+__rte_experimental
+int
+rte_vfio_user_reset(int dev_id);
+
#endif
diff --git a/lib/librte_vfio_user/version.map b/lib/librte_vfio_user/version.map
index a0cda2b49c..2e362d00bc 100644
--- a/lib/librte_vfio_user/version.map
+++ b/lib/librte_vfio_user/version.map
@@ -12,6 +12,15 @@ EXPERIMENTAL {
rte_vfio_user_set_irq_info;
rte_vfio_user_attach_dev;
rte_vfio_user_detach_dev;
+ rte_vfio_user_get_dev_info;
+ rte_vfio_user_get_reg_info;
+ rte_vfio_user_get_irq_info;
+ rte_vfio_user_dma_map;
+ rte_vfio_user_dma_unmap;
+ rte_vfio_user_set_irqs;
+ rte_vfio_user_region_read;
+ rte_vfio_user_region_write;
+ rte_vfio_user_reset;
local: *;
};
diff --git a/lib/librte_vfio_user/vfio_user_client.c b/lib/librte_vfio_user/vfio_user_client.c
index f288cf70f5..852e7f253a 100644
--- a/lib/librte_vfio_user/vfio_user_client.c
+++ b/lib/librte_vfio_user/vfio_user_client.c
@@ -279,3 +279,422 @@ rte_vfio_user_detach_dev(int dev_id)
return ret;
}
+
+int
+rte_vfio_user_get_dev_info(int dev_id, struct vfio_device_info *info)
+{
+ struct vfio_user_msg msg = { 0 };
+ struct vfio_user_client *dev;
+ int ret;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE + sizeof(struct vfio_device_info);
+
+ if (!info)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to get device info: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_GET_INFO,
+ sz, dev->msg_id++);
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to get device info: %s\n",
+ msg.err ? strerror(msg.err) : "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ memcpy(info, &msg.payload.dev_info, sizeof(*info));
+ return ret;
+}
+
+int
+rte_vfio_user_get_reg_info(int dev_id, struct vfio_region_info *info,
+ int *fd)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret, fd_num = 0;
+ struct vfio_user_client *dev;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE + info->argsz;
+ struct vfio_user_reg *reg = &msg.payload.reg_info;
+
+ if (!info || !fd)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to get region info: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_GET_REGION_INFO,
+ sz, dev->msg_id++);
+ reg->reg_info.index = info->index;
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to get region(%u) info: %s\n",
+ info->index, msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (reg->reg_info.flags & VFIO_REGION_INFO_FLAG_MMAP)
+ fd_num = 1;
+
+ if (vfio_user_check_msg_fdnum(&msg, fd_num) != 0)
+ return -1;
+
+ if (reg->reg_info.index != info->index ||
+ msg.size - VFIO_USER_MSG_HDR_SIZE > sizeof(*reg)) {
+ VFIO_USER_LOG(ERR,
+ "Incorrect reply message for region info\n");
+ return -1;
+ }
+
+ memcpy(info, &msg.payload.reg_info, info->argsz);
+ *fd = fd_num == 1 ? msg.fds[0] : -1;
+
+ return 0;
+}
+
+int
+rte_vfio_user_get_irq_info(int dev_id, struct vfio_irq_info *info)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ struct vfio_user_client *dev;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE + sizeof(struct vfio_irq_info);
+ struct vfio_irq_info *irq_info = &msg.payload.irq_info;
+
+ if (!info)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to get region info: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_GET_IRQ_INFO,
+ sz, dev->msg_id++);
+ irq_info->index = info->index;
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to get irq(%u) info: %s\n",
+ info->index, msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ if (irq_info->index != info->index ||
+ msg.size - VFIO_USER_MSG_HDR_SIZE != sizeof(*irq_info)) {
+ VFIO_USER_LOG(ERR,
+ "Incorrect reply message for IRQ info\n");
+ return -1;
+ }
+
+ memcpy(info, irq_info, sizeof(*info));
+ return 0;
+}
+
+static int
+vfio_user_client_dma_map_unmap(struct vfio_user_client *dev,
+ struct rte_vfio_user_mem_reg *mem, int *fds, uint32_t num, bool ismap)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ uint32_t i, mem_sz, map;
+ uint16_t cmd = VFIO_USER_DMA_UNMAP;
+
+ if (num > VFIO_USER_MSG_MAX_NREG) {
+ VFIO_USER_LOG(ERR,
+ "Too many memory regions to %s (MAX: %u)\n",
+ ismap ? "map" : "unmap", VFIO_USER_MSG_MAX_NREG);
+ return -EINVAL;
+ }
+
+ if (ismap) {
+ cmd = VFIO_USER_DMA_MAP;
+
+ for (i = 0; i < num; i++) {
+ map = mem->flags & RTE_VUSER_MEM_MAPPABLE;
+ if ((map && (fds[i] == -1)) ||
+ (!map && (fds[i] != -1))) {
+ VFIO_USER_LOG(ERR, "%spable memory region "
+ "should%s have valid fd\n",
+ ismap ? "Map" : "Unmap",
+ ismap ? "" : " not");
+ return -EINVAL;
+ }
+
+ if (fds[i] != -1)
+ msg.fds[msg.fd_num++] = fds[i];
+ }
+ }
+
+ mem_sz = sizeof(struct rte_vfio_user_mem_reg) * num;
+ memcpy(&msg.payload, mem, mem_sz);
+
+ vfio_user_client_fill_hdr(&msg, cmd, mem_sz + VFIO_USER_MSG_HDR_SIZE,
+ dev->msg_id++);
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to %smap memory regions: "
+ "%s\n", ismap ? "" : "un",
+ msg.err ? strerror(msg.err) : "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ return 0;
+}
+
+int
+rte_vfio_user_dma_map(int dev_id, struct rte_vfio_user_mem_reg *mem,
+ int *fds, uint32_t num)
+{
+ struct vfio_user_client *dev;
+
+ if (!mem || !fds)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to dma map: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ return vfio_user_client_dma_map_unmap(dev, mem, fds, num, true);
+}
+
+int
+rte_vfio_user_dma_unmap(int dev_id, struct rte_vfio_user_mem_reg *mem,
+ uint32_t num)
+{
+ struct vfio_user_client *dev;
+
+ if (!mem)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to dma unmap: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ return vfio_user_client_dma_map_unmap(dev, mem, NULL, num, false);
+}
+
+int
+rte_vfio_user_set_irqs(int dev_id, struct vfio_irq_set *set)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ struct vfio_user_client *dev;
+ uint32_t set_sz = set->argsz;
+ struct vfio_user_irq_set *irq_set = &msg.payload.irq_set;
+
+ if (!set)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to set irqs: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ if (set->flags & VFIO_IRQ_SET_DATA_EVENTFD) {
+ msg.fd_num = set->count;
+ memcpy(msg.fds, set->data, sizeof(int) * set->count);
+ set_sz -= sizeof(int) * set->count;
+ }
+ memcpy(irq_set, set, set_sz);
+ irq_set->set.argsz = set_sz;
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_SET_IRQS,
+ VFIO_USER_MSG_HDR_SIZE + set_sz, dev->msg_id++);
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to set irq(%u): %s\n",
+ set->index, msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ return 0;
+}
+
+int
+rte_vfio_user_region_read(int dev_id, uint32_t idx, uint64_t offset,
+ uint32_t size, void *data)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ struct vfio_user_client *dev;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE + sizeof(struct vfio_user_reg_rw)
+ - VFIO_USER_MAX_RW_DATA;
+ struct vfio_user_reg_rw *rw = &msg.payload.reg_rw;
+
+ if (!data)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to read region: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ if (sz > VFIO_USER_MAX_RW_DATA) {
+ VFIO_USER_LOG(ERR, "Region read size exceeds max\n");
+ return -1;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_REGION_READ,
+ sz, dev->msg_id++);
+
+ rw->reg_idx = idx;
+ rw->reg_offset = offset;
+ rw->size = size;
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to read region(%u): %s\n",
+ idx, msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ memcpy(data, rw->data, size);
+ return 0;
+}
+
+int
+rte_vfio_user_region_write(int dev_id, uint32_t idx, uint64_t offset,
+ uint32_t size, const void *data)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ struct vfio_user_client *dev;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE + sizeof(struct vfio_user_reg_rw)
+ - VFIO_USER_MAX_RW_DATA + size;
+ struct vfio_user_reg_rw *rw = &msg.payload.reg_rw;
+
+ if (!data)
+ return -EINVAL;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to write region: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ if (sz > VFIO_USER_MAX_RW_DATA) {
+ VFIO_USER_LOG(ERR, "Region write size exceeds max\n");
+ return -EINVAL;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_REGION_WRITE,
+ sz, dev->msg_id++);
+
+ rw->reg_idx = idx;
+ rw->reg_offset = offset;
+ rw->size = size;
+ memcpy(rw->data, data, size);
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to write region(%u): %s\n",
+ idx, msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ return 0;
+}
+
+int
+rte_vfio_user_reset(int dev_id)
+{
+ struct vfio_user_msg msg = { 0 };
+ int ret;
+ struct vfio_user_client *dev;
+ uint32_t sz = VFIO_USER_MSG_HDR_SIZE;
+
+ dev = vfio_client_devs.cl[dev_id];
+ if (!dev) {
+ VFIO_USER_LOG(ERR, "Failed to write region: "
+ "wrong device ID\n");
+ return -EINVAL;
+ }
+
+ vfio_user_client_fill_hdr(&msg, VFIO_USER_DEVICE_RESET,
+ sz, dev->msg_id++);
+
+ ret = vfio_user_client_send_recv(dev->sock.sock_fd, &msg);
+ if (ret)
+ return ret;
+
+ if (msg.flags & VFIO_USER_ERROR) {
+ VFIO_USER_LOG(ERR, "Failed to reset device: %s\n",
+ msg.err ? strerror(msg.err) :
+ "Unknown error");
+ return msg.err ? -(int)msg.err : -1;
+ }
+
+ if (vfio_user_check_msg_fdnum(&msg, 0) != 0)
+ return -1;
+
+ return ret;
+}
--
2.17.1