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qed: Disable RoCE dpm when DCBx change occurs 

If DCBx update occurs while QPs are open, stop sending edpms until all
QPs are closed.

Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mintz, Yuval 2017-06-20 16:00:02 +03:00 committed by David S. Miller
parent 26462ad9c7
commit 9331dad1bb
3 changed files with 49 additions and 0 deletions
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8
drivers/net/ethernet/qlogic/qed/qed_dcbx.c
View File

@ -44,6 +44,7 @@
#include "qed_hsi.h"
#include "qed_sp.h"
#include "qed_sriov.h"
#include "qed_roce.h"
#ifdef CONFIG_DCB
#include <linux/qed/qed_eth_if.h>
#endif
@ -892,6 +893,13 @@ qed_dcbx_mib_update_event(struct qed_hwfn *p_hwfn,
/* update storm FW with negotiation results */
qed_sp_pf_update(p_hwfn);
/* for roce PFs, we may want to enable/disable DPM
* when DCBx change occurs
*/
if (p_hwfn->hw_info.personality ==
QED_PCI_ETH_ROCE)
qed_roce_dpm_dcbx(p_hwfn, p_ptt);
}
}

36
drivers/net/ethernet/qlogic/qed/qed_roce.c
View File

@ -162,6 +162,11 @@ static int qed_bmap_test_id(struct qed_hwfn *p_hwfn,
return test_bit(id_num, bmap->bitmap);
}
static bool qed_bmap_is_empty(struct qed_bmap *bmap)
{
return bmap->max_count == find_first_bit(bmap->bitmap, bmap->max_count);
}
static u32 qed_rdma_get_sb_id(void *p_hwfn, u32 rel_sb_id)
{
/* First sb id for RoCE is after all the l2 sb */
@ -2638,6 +2643,23 @@ static void *qed_rdma_get_rdma_ctx(struct qed_dev *cdev)
return QED_LEADING_HWFN(cdev);
}
static bool qed_rdma_allocated_qps(struct qed_hwfn *p_hwfn)
{
bool result;
/* if rdma info has not been allocated, naturally there are no qps */
if (!p_hwfn->p_rdma_info)
return false;
spin_lock_bh(&p_hwfn->p_rdma_info->lock);
if (!p_hwfn->p_rdma_info->cid_map.bitmap)
result = false;
else
result = !qed_bmap_is_empty(&p_hwfn->p_rdma_info->cid_map);
spin_unlock_bh(&p_hwfn->p_rdma_info->lock);
return result;
}
static void qed_rdma_dpm_conf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u32 val;
@ -2650,6 +2672,20 @@ static void qed_rdma_dpm_conf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
val, p_hwfn->dcbx_no_edpm, p_hwfn->db_bar_no_edpm);
}
void qed_roce_dpm_dcbx(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
u8 val;
/* if any QPs are already active, we want to disable DPM, since their
* context information contains information from before the latest DCBx
* update. Otherwise enable it.
*/
val = qed_rdma_allocated_qps(p_hwfn) ? true : false;
p_hwfn->dcbx_no_edpm = (u8)val;
qed_rdma_dpm_conf(p_hwfn, p_ptt);
}
void qed_rdma_dpm_bar(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
p_hwfn->db_bar_no_edpm = true;

5
drivers/net/ethernet/qlogic/qed/qed_roce.h
View File

@ -168,10 +168,15 @@ struct qed_rdma_qp {
#if IS_ENABLED(CONFIG_QED_RDMA)
void qed_rdma_dpm_bar(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
void qed_roce_dpm_dcbx(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
void qed_roce_async_event(struct qed_hwfn *p_hwfn,
u8 fw_event_code, union rdma_eqe_data *rdma_data);
#else
static inline void qed_rdma_dpm_bar(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt) {}
static inline void qed_roce_dpm_dcbx(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt) {}
static inline void qed_roce_async_event(struct qed_hwfn *p_hwfn,
u8 fw_event_code,
union rdma_eqe_data *rdma_data) {}