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qed: Warn PTT usage by wrong hw-function

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[ Upstream commit 3a50d3518d ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mintz, Yuval
2017-04-06 15:58:28 +03:00
committed by Chris
parent ae73eda6cd
commit d8fb688aa6
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/qlogic/qed/qed_hw.c
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@@ -34,6 +34,7 @@ struct qed_ptt {
struct list_head list_entry;
unsigned int idx;
struct pxp_ptt_entry pxp;
u8 hwfn_id;
};
struct qed_ptt_pool {
@@ -55,6 +56,7 @@ 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);
@@ -169,6 +171,11 @@ 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) {