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[hermon] Perform clean MPT unmap on device shutdown 

This change is ported from Flexboot sources.  When stopping a Hermon
device, perform hermon_unmap_mpt() which runs HERMON_HCR_HW2SW_MPT to
bring the Memory Protection Table (MPT) back to software control.

Signed-off-by: Christian Iversen <ci@iversenit.dk>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/234/head
Christian Iversen 2021-01-26 23:48:44 +01:00 committed by Michael Brown
parent 699b9f1d1b
commit 43d72d0087
2 changed files with 29 additions and 0 deletions
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28
src/drivers/infiniband/hermon.c
View File

@ -331,6 +331,13 @@ hermon_cmd_sw2hw_mpt ( struct hermon *hermon, unsigned int index,
0, mpt, index, NULL );
}
static inline int
hermon_cmd_hw2sw_mpt ( struct hermon *hermon, unsigned int index ) {
return hermon_cmd ( hermon,
HERMON_HCR_VOID_CMD ( HERMON_HCR_HW2SW_MPT ),
0, NULL, index, NULL );
}
static inline int
hermon_cmd_write_mtt ( struct hermon *hermon,
const struct hermonprm_write_mtt *write_mtt ) {
@ -2807,6 +2814,25 @@ static int hermon_setup_mpt ( struct hermon *hermon ) {
return 0;
}
/**
* Unmap memory protection table
*
* @v hermon Hermon device
* @ret rc Return status code
*/
static int hermon_unmap_mpt ( struct hermon *hermon ) {
int rc;
if ( ( rc = hermon_cmd_hw2sw_mpt ( hermon,
hermon->cap.reserved_mrws ) ) != 0 ){
DBGC ( hermon, "Hermon %p could not unmap MPT: %s\n",
hermon, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Configure special queue pairs
*
@ -2888,6 +2914,7 @@ static int hermon_start ( struct hermon *hermon, int running ) {
err_conf_special_qps:
hermon_destroy_eq ( hermon );
err_create_eq:
hermon_unmap_mpt ( hermon );
err_setup_mpt:
hermon_cmd_close_hca ( hermon );
err_init_hca:
@ -2905,6 +2932,7 @@ static int hermon_start ( struct hermon *hermon, int running ) {
*/
static void hermon_stop ( struct hermon *hermon ) {
hermon_destroy_eq ( hermon );
hermon_unmap_mpt ( hermon );
hermon_cmd_close_hca ( hermon );
hermon_unmap_icm ( hermon );
hermon_stop_firmware ( hermon );

1
src/drivers/infiniband/hermon.h
View File

@ -52,6 +52,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define HERMON_HCR_CLOSE_PORT 0x000a
#define HERMON_HCR_SET_PORT 0x000c
#define HERMON_HCR_SW2HW_MPT 0x000d
#define HERMON_HCR_HW2SW_MPT 0x000f
#define HERMON_HCR_WRITE_MTT 0x0011
#define HERMON_HCR_MAP_EQ 0x0012
#define HERMON_HCR_SW2HW_EQ 0x0013