qed: Warn PTT usage by wrong hw-function
PTT entries are per-hwfn; If some errneous flow is trying
to use a PTT belonging to a differnet hwfn warn user, as this
can break every register accessing flow later and is very hard
to root-cause.
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/qlogic/qed/qed_hw.c b/drivers/net/ethernet/qlogic/qed/qed_hw.c
index 79e584a..a05feb3 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_hw.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_hw.c
@@ -58,6 +58,7 @@ struct qed_ptt {
struct list_head list_entry;
unsigned int idx;
struct pxp_ptt_entry pxp;
+ u8 hwfn_id;
};
struct qed_ptt_pool {
@@ -79,6 +80,7 @@ int qed_ptt_pool_alloc(struct qed_hwfn *p_hwfn)
p_pool->ptts[i].idx = i;
p_pool->ptts[i].pxp.offset = QED_BAR_INVALID_OFFSET;
p_pool->ptts[i].pxp.pretend.control = 0;
+ p_pool->ptts[i].hwfn_id = p_hwfn->my_id;
if (i >= RESERVED_PTT_MAX)
list_add(&p_pool->ptts[i].list_entry,
&p_pool->free_list);
@@ -193,6 +195,11 @@ static u32 qed_set_ptt(struct qed_hwfn *p_hwfn,
offset = hw_addr - win_hw_addr;
+ if (p_ptt->hwfn_id != p_hwfn->my_id)
+ DP_NOTICE(p_hwfn,
+ "ptt[%d] of hwfn[%02x] is used by hwfn[%02x]!\n",
+ p_ptt->idx, p_ptt->hwfn_id, p_hwfn->my_id);
+
/* Verify the address is within the window */
if (hw_addr < win_hw_addr ||
offset >= PXP_EXTERNAL_BAR_PF_WINDOW_SINGLE_SIZE) {