diff mbox series

[net-next,v2,07/11] bnxt_en: Do not free FW log context memory

Message ID 20241115151438.550106-8-michael.chan@broadcom.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: Add context memory dump to coredump | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 110 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 2 this patch: 2
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-11-15--21-00 (tests: 789)

Commit Message

Michael Chan Nov. 15, 2024, 3:14 p.m. UTC 
From: Hongguang Gao <hongguang.gao@broadcom.com>

If FW supports appending new FW logs to an offset in the context
memory after FW reset, then do not free this type of context memory
during reset.  The driver will provide the initial offset to the FW
when configuring this type of context memory.  This way, we don't lose
the older FW logs after reset.

Signed-off-by: Hongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 43 +++++++++++++++----
 .../net/ethernet/broadcom/bnxt/bnxt_devlink.c |  2 +-
 2 files changed, 36 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 07510df4497b..b0f3b431708c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -8300,6 +8300,9 @@  static int bnxt_alloc_all_ctx_pg_info(struct bnxt *bp, int ctx_max)
 	return 0;
 }
 
+static void bnxt_free_one_ctx_mem(struct bnxt *bp,
+				  struct bnxt_ctx_mem_type *ctxm, bool force);
+
 #define BNXT_CTX_INIT_VALID(flags)	\
 	(!!((flags) &			\
 	    FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_ENABLE_CTX_KIND_INIT))
@@ -8328,6 +8331,8 @@  static int bnxt_hwrm_func_backing_store_qcaps_v2(struct bnxt *bp)
 	for (type = 0; type < BNXT_CTX_V2_MAX; ) {
 		struct bnxt_ctx_mem_type *ctxm = &ctx->ctx_arr[type];
 		u8 init_val, init_off, i;
+		u32 max_entries;
+		u16 entry_size;
 		__le32 *p;
 		u32 flags;
 
@@ -8337,15 +8342,26 @@  static int bnxt_hwrm_func_backing_store_qcaps_v2(struct bnxt *bp)
 			goto ctx_done;
 		flags = le32_to_cpu(resp->flags);
 		type = le16_to_cpu(resp->next_valid_type);
-		if (!(flags & FUNC_BACKING_STORE_QCAPS_V2_RESP_FLAGS_TYPE_VALID))
+		if (!(flags & BNXT_CTX_MEM_TYPE_VALID)) {
+			bnxt_free_one_ctx_mem(bp, ctxm, true);
 			continue;
-
+		}
+		entry_size = le16_to_cpu(resp->entry_size);
+		max_entries = le32_to_cpu(resp->max_num_entries);
+		if (ctxm->mem_valid) {
+			if (!(flags & BNXT_CTX_MEM_PERSIST) ||
+			    ctxm->entry_size != entry_size ||
+			    ctxm->max_entries != max_entries)
+				bnxt_free_one_ctx_mem(bp, ctxm, true);
+			else
+				continue;
+		}
 		ctxm->type = le16_to_cpu(resp->type);
-		ctxm->entry_size = le16_to_cpu(resp->entry_size);
+		ctxm->entry_size = entry_size;
 		ctxm->flags = flags;
 		ctxm->instance_bmap = le32_to_cpu(resp->instance_bit_map);
 		ctxm->entry_multiple = resp->entry_multiple;
-		ctxm->max_entries = le32_to_cpu(resp->max_num_entries);
+		ctxm->max_entries = max_entries;
 		ctxm->min_entries = le32_to_cpu(resp->min_num_entries);
 		init_val = resp->ctx_init_value;
 		init_off = resp->ctx_init_offset;
@@ -8790,6 +8806,16 @@  static int bnxt_hwrm_func_backing_store_cfg_v2(struct bnxt *bp,
 	hwrm_req_hold(bp, req);
 	req->type = cpu_to_le16(ctxm->type);
 	req->entry_size = cpu_to_le16(ctxm->entry_size);
+	if ((ctxm->flags & BNXT_CTX_MEM_PERSIST) &&
+	    bnxt_bs_trace_avail(bp, ctxm->type)) {
+		struct bnxt_bs_trace_info *bs_trace;
+		u32 enables;
+
+		enables = FUNC_BACKING_STORE_CFG_V2_REQ_ENABLES_NEXT_BS_OFFSET;
+		req->enables = cpu_to_le32(enables);
+		bs_trace = &bp->bs_trace[bnxt_bstore_to_trace[ctxm->type]];
+		req->next_bs_offset = cpu_to_le32(bs_trace->last_offset);
+	}
 	req->subtype_valid_cnt = ctxm->split_entry_cnt;
 	for (i = 0, p = &req->split_entry_0; i < ctxm->split_entry_cnt; i++)
 		p[i] = cpu_to_le32(ctxm->split[i]);
@@ -8884,6 +8910,7 @@  static void bnxt_free_one_ctx_mem(struct bnxt *bp,
 		ctxm->pg_info = NULL;
 		ctxm->mem_valid = 0;
 	}
+	memset(ctxm, 0, sizeof(*ctxm));
 }
 
 void bnxt_free_ctx_mem(struct bnxt *bp, bool force)
@@ -11862,7 +11889,7 @@  static int bnxt_hwrm_if_change(struct bnxt *bp, bool up)
 			set_bit(BNXT_STATE_FW_RESET_DET, &bp->state);
 			if (!test_bit(BNXT_STATE_IN_FW_RESET, &bp->state))
 				bnxt_ulp_irq_stop(bp);
-			bnxt_free_ctx_mem(bp, true);
+			bnxt_free_ctx_mem(bp, false);
 			bnxt_dcb_free(bp);
 			rc = bnxt_fw_init_one(bp);
 			if (rc) {
@@ -13575,7 +13602,7 @@  static void bnxt_fw_reset_close(struct bnxt *bp)
 	bnxt_hwrm_func_drv_unrgtr(bp);
 	if (pci_is_enabled(bp->pdev))
 		pci_disable_device(bp->pdev);
-	bnxt_free_ctx_mem(bp, true);
+	bnxt_free_ctx_mem(bp, false);
 }
 
 static bool is_bnxt_fw_ok(struct bnxt *bp)
@@ -16128,7 +16155,7 @@  static int bnxt_suspend(struct device *device)
 	}
 	bnxt_hwrm_func_drv_unrgtr(bp);
 	pci_disable_device(bp->pdev);
-	bnxt_free_ctx_mem(bp, true);
+	bnxt_free_ctx_mem(bp, false);
 	rtnl_unlock();
 	return rc;
 }
@@ -16240,7 +16267,7 @@  static pci_ers_result_t bnxt_io_error_detected(struct pci_dev *pdev,
 
 	if (pci_is_enabled(pdev))
 		pci_disable_device(pdev);
-	bnxt_free_ctx_mem(bp, true);
+	bnxt_free_ctx_mem(bp, false);
 	rtnl_unlock();
 
 	/* Request a slot slot reset. */
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
index 901fd36757ed..ef8288fd68f4 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
@@ -463,7 +463,7 @@  static int bnxt_dl_reload_down(struct devlink *dl, bool netns_change,
 			break;
 		}
 		bnxt_cancel_reservations(bp, false);
-		bnxt_free_ctx_mem(bp, true);
+		bnxt_free_ctx_mem(bp, false);
 		break;
 	}
 	case DEVLINK_RELOAD_ACTION_FW_ACTIVATE: {