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eth: fbnic: factor out clearing the action TCAM

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We'll want to wipe the driver TCAM state after FW crash, to force
a re-programming. Factor out the clearing logic. Remove the micro-
-optimization to skip clearing the BMC entry twice, it doesn't hurt.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250916231420.1693955-4-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Jakub Kicinski 2025-09-16 16:14:14 -07:00 committed by Paolo Abeni
parent 7fd1f7bac2
commit 504f8b7119
1 changed files with 21 additions and 15 deletions
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36
drivers/net/ethernet/meta/fbnic/fbnic_rpc.c
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@ -1124,13 +1124,25 @@ void fbnic_write_ip_addr(struct fbnic_dev *fbd)
}
}
void fbnic_clear_rules(struct fbnic_dev *fbd)
static void fbnic_clear_valid_act_tcam(struct fbnic_dev *fbd)
{
u32 dest = FIELD_PREP(FBNIC_RPC_ACT_TBL0_DEST_MASK,
FBNIC_RPC_ACT_TBL0_DEST_BMC);
int i = FBNIC_RPC_TCAM_ACT_NUM_ENTRIES - 1;
struct fbnic_act_tcam *act_tcam;
/* Work from the bottom up deleting all other rules from hardware */
do {
act_tcam = &fbd->act_tcam[i];
if (act_tcam->state != FBNIC_TCAM_S_VALID)
continue;
fbnic_clear_act_tcam(fbd, i);
act_tcam->state = FBNIC_TCAM_S_UPDATE;
} while (i--);
}
void fbnic_clear_rules(struct fbnic_dev *fbd)
{
/* Clear MAC rules */
fbnic_clear_macda(fbd);
@ -1145,6 +1157,11 @@ void fbnic_clear_rules(struct fbnic_dev *fbd)
* the interface back up.
*/
if (fbnic_bmc_present(fbd)) {
u32 dest = FIELD_PREP(FBNIC_RPC_ACT_TBL0_DEST_MASK,
FBNIC_RPC_ACT_TBL0_DEST_BMC);
int i = FBNIC_RPC_TCAM_ACT_NUM_ENTRIES - 1;
struct fbnic_act_tcam *act_tcam;
act_tcam = &fbd->act_tcam[i];
if (act_tcam->state == FBNIC_TCAM_S_VALID &&
@ -1153,21 +1170,10 @@ void fbnic_clear_rules(struct fbnic_dev *fbd)
wr32(fbd, FBNIC_RPC_ACT_TBL1(i), 0);
act_tcam->state = FBNIC_TCAM_S_UPDATE;
i--;
}
}
/* Work from the bottom up deleting all other rules from hardware */
do {
act_tcam = &fbd->act_tcam[i];
if (act_tcam->state != FBNIC_TCAM_S_VALID)
continue;
fbnic_clear_act_tcam(fbd, i);
act_tcam->state = FBNIC_TCAM_S_UPDATE;
} while (i--);
fbnic_clear_valid_act_tcam(fbd);
}
static void fbnic_delete_act_tcam(struct fbnic_dev *fbd, unsigned int idx)