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RDMA/efa: Support remote read access in MR registration

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Enable remote read access for memory regions in order to support RDMA
operations.

Link: https://lore.kernel.org/r/20191121141509.59297-3-galpress@amazon.com
Signed-off-by: Daniel Kranzdorf <dkkranzd@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Daniel Kranzdorf 2019-11-21 16:15:08 +02:00 committed by Jason Gunthorpe
parent bcf7cc534c
commit e6c4f3ff43
4 changed files with 14 additions and 13 deletions
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12
drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
View File

@ -362,9 +362,13 @@ struct efa_admin_reg_mr_cmd {
/*
* permissions
* 0 : local_write_enable - Write permissions: value
* of 1 needed for RQ buffers and for RDMA write
* 7:1 : reserved1 - remote access flags, etc
* 0 : local_write_enable - Local write permissions:
* must be set for RQ buffers and buffers posted for
* RDMA Read requests
* 1 : reserved1 - MBZ
* 2 : remote_read_enable - Remote read permissions:
* must be set to enable RDMA read from the region
* 7:3 : reserved2 - MBZ
*/
u8 permissions;
@ -780,6 +784,8 @@ struct efa_admin_mmio_req_read_less_resp {
#define EFA_ADMIN_REG_MR_CMD_MEM_ADDR_PHY_MODE_EN_SHIFT 7
#define EFA_ADMIN_REG_MR_CMD_MEM_ADDR_PHY_MODE_EN_MASK BIT(7)
#define EFA_ADMIN_REG_MR_CMD_LOCAL_WRITE_ENABLE_MASK BIT(0)
#define EFA_ADMIN_REG_MR_CMD_REMOTE_READ_ENABLE_SHIFT 2
#define EFA_ADMIN_REG_MR_CMD_REMOTE_READ_ENABLE_MASK BIT(2)
/* create_cq_cmd */
#define EFA_ADMIN_CREATE_CQ_CMD_INTERRUPT_MODE_ENABLED_SHIFT 5

3
drivers/infiniband/hw/efa/efa_com_cmd.c
View File

@ -230,8 +230,7 @@ int efa_com_register_mr(struct efa_com_dev *edev,
mr_cmd.flags |= params->page_shift &
EFA_ADMIN_REG_MR_CMD_PHYS_PAGE_SIZE_SHIFT_MASK;
mr_cmd.iova = params->iova;
mr_cmd.permissions |= params->permissions &
EFA_ADMIN_REG_MR_CMD_LOCAL_WRITE_ENABLE_MASK;
mr_cmd.permissions = params->permissions;
if (params->inline_pbl) {
memcpy(mr_cmd.pbl.inline_pbl_array,

7
drivers/infiniband/hw/efa/efa_com_cmd.h
View File

@ -178,12 +178,7 @@ struct efa_com_reg_mr_params {
* address mapping
*/
u8 page_shift;
/*
* permissions
* 0: local_write_enable - Write permissions: value of 1 needed
* for RQ buffers and for RDMA write:1: reserved1 - remote
* access flags, etc
*/
/* see permissions field of struct efa_admin_reg_mr_cmd */
u8 permissions;
u8 inline_pbl;
u8 indirect;

5
drivers/infiniband/hw/efa/efa_verbs.c
View File

@ -70,7 +70,8 @@ static const char *const efa_stats_names[] = {
#define EFA_CHUNK_USED_SIZE \
((EFA_PTRS_PER_CHUNK * EFA_CHUNK_PAYLOAD_PTR_SIZE) + EFA_CHUNK_PTR_SIZE)
#define EFA_SUPPORTED_ACCESS_FLAGS IB_ACCESS_LOCAL_WRITE
#define EFA_SUPPORTED_ACCESS_FLAGS \
(IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_READ)
struct pbl_chunk {
dma_addr_t dma_addr;
@ -1382,7 +1383,7 @@ struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
params.pd = to_epd(ibpd)->pdn;
params.iova = virt_addr;
params.mr_length_in_bytes = length;
params.permissions = access_flags & 0x1;
params.permissions = access_flags;
pg_sz = ib_umem_find_best_pgsz(mr->umem,
dev->dev_attr.page_size_cap,