[PATCH] IB/mthca: add fast memory region implementation
Implement fast memory regions (FMRs), where the driver writes directly into
the HCA's translation tables rather than requiring a firmware command. For
Tavor, MTTs for FMR are separate from regular MTTs, and are reserved at driver
initialization. This is done to limit the amount of virtual memory needed to
map the MTTs. For Arbel, there's no such limitation, and all MTTs and MPTs
may be used for FMR or for regular MR.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h
index 0598f39..619710f 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.h
+++ b/drivers/infiniband/hw/mthca/mthca_provider.h
@@ -60,6 +60,24 @@
u32 first_seg;
};
+struct mthca_fmr {
+ struct ib_fmr ibmr;
+ struct ib_fmr_attr attr;
+ int order;
+ u32 first_seg;
+ int maps;
+ union {
+ struct {
+ struct mthca_mpt_entry __iomem *mpt;
+ u64 __iomem *mtts;
+ } tavor;
+ struct {
+ struct mthca_mpt_entry *mpt;
+ __be64 *mtts;
+ } arbel;
+ } mem;
+};
+
struct mthca_pd {
struct ib_pd ibpd;
u32 pd_num;
@@ -218,6 +236,11 @@
dma_addr_t header_dma;
};
+static inline struct mthca_fmr *to_mfmr(struct ib_fmr *ibmr)
+{
+ return container_of(ibmr, struct mthca_fmr, ibmr);
+}
+
static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr)
{
return container_of(ibmr, struct mthca_mr, ibmr);