[ofa-general] Re: [PATCH 2.6.30] xprtrdma: The frmr iova_start values are truncated by the nfs rdma client.

[Steve Wise]

Steve Wise wrote:
> Steve Wise wrote:
>
> >Trond Myklebust wrote (earlier in this thread):
> >
> > All I should need to know is that I can advertise either dma handles or
> > kernel VAs, and know that I can choose between two functions, say,
> > ib_send_wr_fastreg_dma_init() and ib_send_wr_fastreg_kva_init() to
> > initialise the ib_send_wr structure correctly.
>
>
> To align more with the rest of the fast_reg API in ib_verbs.h, I propose:
>
> static inline void ib_init_fast_reg_iova_start_dma(struct ib_send_wr 
> *send_wr, dma_addr_t dma);
> static inline void ib_init_fast_reg_iova_start_kva(struct ib_send_wr 
> *send_wr, void *kva);
>
> Thoughts?
>
>
uncompiled patch:

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index c179318..fb56930 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1940,6 +1940,30 @@ static inline void ib_update_fast_reg_key(struct 
ib_mr *mr, u8 newkey)
 }
 
 /**
+ * ib_init_fast_reg_iova_start_dma - initializes the iova_start field
+ *   based on a dma address supplied by the user.
+ * @wr - struct ib_send_wr pointer to be initialized
+ * @addr - dma_addr_t value to be used as the iova_start
+ */
+static inline void ib_init_fast_reg_iova_start_dma(struct ib_send_wr *wr,
+                                                  dma_addr_t addr)
+{
+       wr->wr.fast_reg.iova_start = addr;
+}
+
+/**
+ * ib_init_fast_reg_iova_start_kva - initializes the iova_start field
+ *   based on a kernel virtual address supplied by the user.
+ * @wr - struct ib_send_wr pointer to be initialized
+ * @addr - void * address to be used as the iova_start
+ */
+static inline void ib_init_fast_reg_iova_start_kva(struct ib_send_wr *wr,
+                                                  void *addr)
+{
+       wr->wr.fast_reg.iova_start = (unsigned long)addr;
+}
+
+/**
  * ib_alloc_mw - Allocates a memory window.
  * @pd: The protection domain associated with the memory window.
  */