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Date: Thu, 18 Apr 2019 08:59:13 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Anirudh Venkataramanan <anirudh.venkataramanan@...el.com>,
netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
Andrew Bowers <andrewx.bowers@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 12/15] ice: Add code for DCB rebuild
From: Anirudh Venkataramanan <anirudh.venkataramanan@...el.com>
This patch introduces a new function ice_dcb_rebuild which reinitializes
DCB after a reset.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/ice/ice_dcb_lib.c | 78 ++++++++++++++++++++
drivers/net/ethernet/intel/ice/ice_dcb_lib.h | 5 ++
drivers/net/ethernet/intel/ice/ice_main.c | 2 +
3 files changed, 85 insertions(+)
diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
index 51f90696de56..3e81af1884fc 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.c
@@ -197,6 +197,84 @@ static int ice_pf_dcb_cfg(struct ice_pf *pf, struct ice_dcbx_cfg *new_cfg)
return ret;
}
+/**
+ * ice_dcb_rebuild - rebuild DCB post reset
+ * @pf: physical function instance
+ */
+void ice_dcb_rebuild(struct ice_pf *pf)
+{
+ struct ice_aqc_port_ets_elem buf = { 0 };
+ struct ice_dcbx_cfg *prev_cfg;
+ enum ice_status ret;
+ u8 willing;
+
+ ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
+ if (ret) {
+ dev_err(&pf->pdev->dev, "Query Port ETS failed\n");
+ goto dcb_error;
+ }
+
+ /* If DCB was not enabled previously, we are done */
+ if (!test_bit(ICE_FLAG_DCB_ENA, pf->flags))
+ return;
+
+ /* Save current willing state and force FW to unwilling */
+ willing = pf->hw.port_info->local_dcbx_cfg.etscfg.willing;
+ pf->hw.port_info->local_dcbx_cfg.etscfg.willing = 0x0;
+ ret = ice_set_dcb_cfg(pf->hw.port_info);
+ if (ret) {
+ dev_err(&pf->pdev->dev, "Failed to set DCB to unwilling\n");
+ goto dcb_error;
+ }
+
+ /* Retrieve DCB config and ensure same as current in SW */
+ prev_cfg = devm_kmemdup(&pf->pdev->dev,
+ &pf->hw.port_info->local_dcbx_cfg,
+ sizeof(*prev_cfg), GFP_KERNEL);
+ if (!prev_cfg) {
+ dev_err(&pf->pdev->dev, "Failed to alloc space for DCB cfg\n");
+ goto dcb_error;
+ }
+
+ ice_init_dcb(&pf->hw);
+ if (memcmp(prev_cfg, &pf->hw.port_info->local_dcbx_cfg,
+ sizeof(*prev_cfg))) {
+ /* difference in cfg detected - disable DCB till next MIB */
+ dev_err(&pf->pdev->dev, "Set local MIB not accurate\n");
+ devm_kfree(&pf->pdev->dev, prev_cfg);
+ goto dcb_error;
+ }
+
+ /* fetched config congruent to previous configuration */
+ devm_kfree(&pf->pdev->dev, prev_cfg);
+
+ /* Configuration replayed - reset willing state to previous */
+ pf->hw.port_info->local_dcbx_cfg.etscfg.willing = willing;
+ ret = ice_set_dcb_cfg(pf->hw.port_info);
+ if (ret) {
+ dev_err(&pf->pdev->dev, "Fail restoring prev willing state\n");
+ goto dcb_error;
+ }
+ dev_info(&pf->pdev->dev, "DCB restored after reset\n");
+ ret = ice_query_port_ets(pf->hw.port_info, &buf, sizeof(buf), NULL);
+ if (ret) {
+ dev_err(&pf->pdev->dev, "Query Port ETS failed\n");
+ goto dcb_error;
+ }
+
+ return;
+
+dcb_error:
+ dev_err(&pf->pdev->dev, "Disabling DCB until new settings occur\n");
+ prev_cfg = devm_kzalloc(&pf->pdev->dev, sizeof(*prev_cfg), GFP_KERNEL);
+ prev_cfg->etscfg.willing = true;
+ prev_cfg->etscfg.tcbwtable[0] = ICE_TC_MAX_BW;
+ prev_cfg->etscfg.tsatable[0] = ICE_IEEE_TSA_ETS;
+ memcpy(&prev_cfg->etsrec, &prev_cfg->etscfg, sizeof(prev_cfg->etsrec));
+ ice_pf_dcb_cfg(pf, prev_cfg);
+ devm_kfree(&pf->pdev->dev, prev_cfg);
+}
+
/**
* ice_dcb_init_cfg - set the initial DCB config in SW
* @pf: pf to apply config to
diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
index 8829cccc0a6a..ca7b76faa03c 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
@@ -8,6 +8,9 @@
#include "ice_lib.h"
#ifdef CONFIG_DCB
+#define ICE_TC_MAX_BW 100 /* Default Max BW percentage */
+
+void ice_dcb_rebuild(struct ice_pf *pf);
u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg);
u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg);
void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi);
@@ -25,6 +28,8 @@ ice_set_cgd_num(struct ice_tlan_ctx *tlan_ctx, struct ice_ring *ring)
tlan_ctx->cgd_num = ring->dcb_tc;
}
#else
+#define ice_dcb_rebuild(pf) do {} while (0)
+
static inline u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg __always_unused *dcbcfg)
{
return ICE_DFLT_TRAFFIC_CLASS;
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 6fd99f1b483c..71f2ab04bab2 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3793,6 +3793,8 @@ static void ice_rebuild(struct ice_pf *pf)
if (err)
goto err_sched_init_port;
+ ice_dcb_rebuild(pf);
+
/* reset search_hint of irq_trackers to 0 since interrupts are
* reclaimed and could be allocated from beginning during VSI rebuild
*/
--
2.20.1
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