New upstream version 18.08

[deb_dpdk.git] / drivers / bus / vmbus / private.h

diff --git a/drivers/bus/vmbus/private.h b/drivers/bus/vmbus/private.h
new file mode 100644 (file)
index 0000000..9964fc4
--- /dev/null
+++ b/drivers/bus/vmbus/private.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (c) 2018, Microsoft Corporation.
+ * All Rights Reserved.
+ */
+
+#ifndef _VMBUS_PRIVATE_H_
+#define _VMBUS_PRIVATE_H_
+
+#include <stdbool.h>
+#include <sys/uio.h>
+#include <rte_log.h>
+#include <rte_vmbus_reg.h>
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE      4096
+#endif
+
+extern int vmbus_logtype_bus;
+#define VMBUS_LOG(level, fmt, args...) \
+       rte_log(RTE_LOG_ ## level, vmbus_logtype_bus, "%s(): " fmt "\n", \
+               __func__, ##args)
+
+struct vmbus_br {
+       struct vmbus_bufring *vbr;
+       uint32_t        dsize;
+       uint32_t        windex; /* next available location */
+};
+
+#define UIO_NAME_MAX 64
+
+struct vmbus_map {
+       void *addr;     /* user mmap of resource */
+       uint64_t size;  /* length */
+};
+
+/*
+ * For multi-process we need to reproduce all vmbus mappings in secondary
+ * processes, so save them in a tailq.
+ */
+struct mapped_vmbus_resource {
+       TAILQ_ENTRY(mapped_vmbus_resource) next;
+
+       rte_uuid_t id;
+       int nb_maps;
+       struct vmbus_map maps[VMBUS_MAX_RESOURCE];
+       char path[PATH_MAX];
+};
+
+TAILQ_HEAD(mapped_vmbus_res_list, mapped_vmbus_resource);
+
+#define HV_MON_TRIG_LEN        32
+#define HV_MON_TRIG_MAX        4
+
+struct vmbus_channel {
+       STAILQ_HEAD(, vmbus_channel) subchannel_list;
+       STAILQ_ENTRY(vmbus_channel) next;
+       const struct rte_vmbus_device *device;
+
+       struct vmbus_br rxbr;
+       struct vmbus_br txbr;
+
+       uint16_t relid;
+       uint16_t subchannel_id;
+       uint8_t monitor_id;
+};
+
+#define VMBUS_MAX_CHANNELS     64
+
+int vmbus_chan_create(const struct rte_vmbus_device *device,
+                     uint16_t relid, uint16_t subid, uint8_t monitor_id,
+                     struct vmbus_channel **new_chan);
+
+void vmbus_add_device(struct rte_vmbus_device *vmbus_dev);
+void vmbus_insert_device(struct rte_vmbus_device *exist_vmbus_dev,
+                        struct rte_vmbus_device *new_vmbus_dev);
+void vmbus_remove_device(struct rte_vmbus_device *vmbus_device);
+
+void vmbus_uio_irq_control(struct rte_vmbus_device *dev, int32_t onoff);
+int vmbus_uio_irq_read(struct rte_vmbus_device *dev);
+
+int vmbus_uio_map_resource(struct rte_vmbus_device *dev);
+void vmbus_uio_unmap_resource(struct rte_vmbus_device *dev);
+
+int vmbus_uio_alloc_resource(struct rte_vmbus_device *dev,
+               struct mapped_vmbus_resource **uio_res);
+void vmbus_uio_free_resource(struct rte_vmbus_device *dev,
+               struct mapped_vmbus_resource *uio_res);
+
+struct mapped_vmbus_resource *
+vmbus_uio_find_resource(const struct rte_vmbus_device *dev);
+int vmbus_uio_map_resource_by_index(struct rte_vmbus_device *dev, int res_idx,
+                                   struct mapped_vmbus_resource *uio_res,
+                                   int flags);
+
+void *vmbus_map_resource(void *requested_addr, int fd, off_t offset,
+               size_t size, int additional_flags);
+void vmbus_unmap_resource(void *requested_addr, size_t size);
+
+bool vmbus_uio_subchannels_supported(const struct rte_vmbus_device *dev,
+                                    const struct vmbus_channel *chan);
+int vmbus_uio_get_subchan(struct vmbus_channel *primary,
+                         struct vmbus_channel **subchan);
+int vmbus_uio_map_rings(struct vmbus_channel *chan);
+
+void vmbus_br_setup(struct vmbus_br *br, void *buf, unsigned int blen);
+
+/* Amount of space available for write */
+static inline uint32_t
+vmbus_br_availwrite(const struct vmbus_br *br, uint32_t windex)
+{
+       uint32_t rindex = br->vbr->rindex;
+
+       if (windex >= rindex)
+               return br->dsize - (windex - rindex);
+       else
+               return rindex - windex;
+}
+
+static inline uint32_t
+vmbus_br_availread(const struct vmbus_br *br)
+{
+       return br->dsize - vmbus_br_availwrite(br, br->vbr->windex);
+}
+
+int vmbus_txbr_write(struct vmbus_br *tbr, const struct iovec iov[], int iovlen,
+                    bool *need_sig);
+
+int vmbus_rxbr_peek(const struct vmbus_br *rbr, void *data, size_t dlen);
+
+int vmbus_rxbr_read(struct vmbus_br *rbr, void *data, size_t dlen, size_t hlen);
+
+#endif /* _VMBUS_PRIVATE_H_ */