[openib-general] [PATCH 01/16] IB uverbs: core API extensions
Roland Dreier
rolandd at cisco.com
Tue Jun 28 16:03:43 PDT 2005
Modify the ib_verbs.h header file with changes required for InfiniBand
userspace verbs support. We add a few structures to keep track of
userspace context, and extend the driver API so that low-level drivers
know when they're creating resources that will be used from userspace.
Signed-off-by: Roland Dreier <rolandd at cisco.com>
---
drivers/infiniband/include/ib_verbs.h | 124 +++++++++++++++++++++++++++++-----
1 files changed, 106 insertions(+), 18 deletions(-)
--- linux.orig/drivers/infiniband/include/ib_verbs.h 2005-06-28 15:19:55.956779699 -0700
+++ linux/drivers/infiniband/include/ib_verbs.h 2005-06-28 15:19:57.390470064 -0700
@@ -4,6 +4,7 @@
* Copyright (c) 2004 Intel Corporation. All rights reserved.
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
* Copyright (c) 2004 Voltaire Corporation. All rights reserved.
+ * Copyright (c) 2005 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -41,7 +42,10 @@
#include <linux/types.h>
#include <linux/device.h>
+
#include <asm/atomic.h>
+#include <asm/scatterlist.h>
+#include <asm/uaccess.h>
union ib_gid {
u8 raw[16];
@@ -544,7 +548,7 @@ struct ib_send_wr {
int num_sge;
enum ib_wr_opcode opcode;
int send_flags;
- u32 imm_data;
+ __be32 imm_data;
union {
struct {
u64 remote_addr;
@@ -618,29 +622,86 @@ struct ib_fmr_attr {
u8 page_size;
};
+struct ib_ucontext {
+ struct ib_device *device;
+ struct list_head pd_list;
+ struct list_head mr_list;
+ struct list_head mw_list;
+ struct list_head cq_list;
+ struct list_head qp_list;
+ struct list_head srq_list;
+ struct list_head ah_list;
+ spinlock_t lock;
+};
+
+struct ib_uobject {
+ u64 user_handle; /* handle given to us by userspace */
+ struct ib_ucontext *context; /* associated user context */
+ struct list_head list; /* link to context's list */
+ u32 id; /* index into kernel idr */
+};
+
+struct ib_umem {
+ unsigned long user_base;
+ unsigned long virt_base;
+ size_t length;
+ int offset;
+ int page_size;
+ int writable;
+ struct list_head chunk_list;
+};
+
+struct ib_umem_chunk {
+ struct list_head list;
+ int nents;
+ int nmap;
+ struct scatterlist page_list[0];
+};
+
+struct ib_udata {
+ void __user *inbuf;
+ void __user *outbuf;
+ size_t inlen;
+ size_t outlen;
+};
+
+#define IB_UMEM_MAX_PAGE_CHUNK \
+ ((PAGE_SIZE - offsetof(struct ib_umem_chunk, page_list)) / \
+ ((void *) &((struct ib_umem_chunk *) 0)->page_list[1] - \
+ (void *) &((struct ib_umem_chunk *) 0)->page_list[0]))
+
+struct ib_umem_object {
+ struct ib_uobject uobject;
+ struct ib_umem umem;
+};
+
struct ib_pd {
- struct ib_device *device;
- atomic_t usecnt; /* count all resources */
+ struct ib_device *device;
+ struct ib_uobject *uobject;
+ atomic_t usecnt; /* count all resources */
};
struct ib_ah {
struct ib_device *device;
struct ib_pd *pd;
+ struct ib_uobject *uobject;
};
typedef void (*ib_comp_handler)(struct ib_cq *cq, void *cq_context);
struct ib_cq {
- struct ib_device *device;
- ib_comp_handler comp_handler;
- void (*event_handler)(struct ib_event *, void *);
- void * cq_context;
- int cqe;
- atomic_t usecnt; /* count number of work queues */
+ struct ib_device *device;
+ struct ib_uobject *uobject;
+ ib_comp_handler comp_handler;
+ void (*event_handler)(struct ib_event *, void *);
+ void * cq_context;
+ int cqe;
+ atomic_t usecnt; /* count number of work queues */
};
struct ib_srq {
struct ib_device *device;
+ struct ib_uobject *uobject;
struct ib_pd *pd;
void *srq_context;
atomic_t usecnt;
@@ -652,6 +713,7 @@ struct ib_qp {
struct ib_cq *send_cq;
struct ib_cq *recv_cq;
struct ib_srq *srq;
+ struct ib_uobject *uobject;
void (*event_handler)(struct ib_event *, void *);
void *qp_context;
u32 qp_num;
@@ -659,16 +721,18 @@ struct ib_qp {
};
struct ib_mr {
- struct ib_device *device;
- struct ib_pd *pd;
- u32 lkey;
- u32 rkey;
- atomic_t usecnt; /* count number of MWs */
+ struct ib_device *device;
+ struct ib_pd *pd;
+ struct ib_uobject *uobject;
+ u32 lkey;
+ u32 rkey;
+ atomic_t usecnt; /* count number of MWs */
};
struct ib_mw {
struct ib_device *device;
struct ib_pd *pd;
+ struct ib_uobject *uobject;
u32 rkey;
};
@@ -737,7 +801,14 @@ struct ib_device {
int (*modify_port)(struct ib_device *device,
u8 port_num, int port_modify_mask,
struct ib_port_modify *port_modify);
- struct ib_pd * (*alloc_pd)(struct ib_device *device);
+ struct ib_ucontext * (*alloc_ucontext)(struct ib_device *device,
+ struct ib_udata *udata);
+ int (*dealloc_ucontext)(struct ib_ucontext *context);
+ int (*mmap)(struct ib_ucontext *context,
+ struct vm_area_struct *vma);
+ struct ib_pd * (*alloc_pd)(struct ib_device *device,
+ struct ib_ucontext *context,
+ struct ib_udata *udata);
int (*dealloc_pd)(struct ib_pd *pd);
struct ib_ah * (*create_ah)(struct ib_pd *pd,
struct ib_ah_attr *ah_attr);
@@ -747,7 +818,8 @@ struct ib_device {
struct ib_ah_attr *ah_attr);
int (*destroy_ah)(struct ib_ah *ah);
struct ib_qp * (*create_qp)(struct ib_pd *pd,
- struct ib_qp_init_attr *qp_init_attr);
+ struct ib_qp_init_attr *qp_init_attr,
+ struct ib_udata *udata);
int (*modify_qp)(struct ib_qp *qp,
struct ib_qp_attr *qp_attr,
int qp_attr_mask);
@@ -762,8 +834,9 @@ struct ib_device {
int (*post_recv)(struct ib_qp *qp,
struct ib_recv_wr *recv_wr,
struct ib_recv_wr **bad_recv_wr);
- struct ib_cq * (*create_cq)(struct ib_device *device,
- int cqe);
+ struct ib_cq * (*create_cq)(struct ib_device *device, int cqe,
+ struct ib_ucontext *context,
+ struct ib_udata *udata);
int (*destroy_cq)(struct ib_cq *cq);
int (*resize_cq)(struct ib_cq *cq, int *cqe);
int (*poll_cq)(struct ib_cq *cq, int num_entries,
@@ -780,6 +853,10 @@ struct ib_device {
int num_phys_buf,
int mr_access_flags,
u64 *iova_start);
+ struct ib_mr * (*reg_user_mr)(struct ib_pd *pd,
+ struct ib_umem *region,
+ int mr_access_flags,
+ struct ib_udata *udata);
int (*query_mr)(struct ib_mr *mr,
struct ib_mr_attr *mr_attr);
int (*dereg_mr)(struct ib_mr *mr);
@@ -817,6 +894,7 @@ struct ib_device {
struct ib_mad *in_mad,
struct ib_mad *out_mad);
+ struct module *owner;
struct class_device class_dev;
struct kobject ports_parent;
struct list_head port_list;
@@ -852,6 +930,16 @@ void *ib_get_client_data(struct ib_devic
void ib_set_client_data(struct ib_device *device, struct ib_client *client,
void *data);
+static inline int ib_copy_from_udata(void *dest, struct ib_udata *udata, size_t len)
+{
+ return copy_from_user(dest, udata->inbuf, len) ? -EFAULT : 0;
+}
+
+static inline int ib_copy_to_udata(struct ib_udata *udata, void *src, size_t len)
+{
+ return copy_to_user(udata->outbuf, src, len) ? -EFAULT : 0;
+}
+
int ib_register_event_handler (struct ib_event_handler *event_handler);
int ib_unregister_event_handler(struct ib_event_handler *event_handler);
void ib_dispatch_event(struct ib_event *event);
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