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IB/ehca: Support large page MRs

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Add support for MR pages larger than 4K on eHCA2. This reduces
firmware memory consumption.  If enabled via the mr_largepage module
parameter, the MR page size will be determined based on the MR length
and the hardware capabilities -- if the MR is >= 16M, 16M pages are
used, for example.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Hoang-Nam Nguyen
2007-07-20 16:01:51 +02:00
committed by Roland Dreier
parent 23f1b38481
commit 5bb7d9290c
5 changed files with 357 additions and 63 deletions
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9
drivers/infiniband/hw/ehca/ehca_classes.h
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@@ -100,6 +100,11 @@ struct ehca_sport {
struct ehca_sma_attr saved_attr;
};
#define HCA_CAP_MR_PGSIZE_4K 1
#define HCA_CAP_MR_PGSIZE_64K 2
#define HCA_CAP_MR_PGSIZE_1M 4
#define HCA_CAP_MR_PGSIZE_16M 8
struct ehca_shca {
struct ib_device ib_device;
struct ibmebus_dev *ibmebus_dev;
@@ -115,6 +120,8 @@ struct ehca_shca {
struct h_galpas galpas;
struct mutex modify_mutex;
u64 hca_cap;
/* MR pgsize: bit 0-3 means 4K, 64K, 1M, 16M respectively */
u32 hca_cap_mr_pgsize;
int max_mtu;
};
@@ -206,6 +213,7 @@ struct ehca_mr {
enum ehca_mr_flag flags;
u32 num_kpages; /* number of kernel pages */
u32 num_hwpages; /* number of hw pages to form MR */
u64 hwpage_size; /* hw page size used for this MR */
int acl; /* ACL (stored here for usage in reregister) */
u64 *start; /* virtual start address (stored here for */
/* usage in reregister) */
@@ -240,6 +248,7 @@ struct ehca_mr_pginfo {
enum ehca_mr_pgi_type type;
u64 num_kpages;
u64 kpage_cnt;
u64 hwpage_size; /* hw page size used for this MR */
u64 num_hwpages; /* number of hw pages */
u64 hwpage_cnt; /* counter for hw pages */
u64 next_hwpage; /* next hw page in buffer/chunk/listelem */