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bnxt_en: Reduce memory usage when running in kdump kernel.

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Skip RDMA context memory allocations, reduce to 1 ring, and disable
TPA when running in the kdump kernel.  Without this patch, the driver
fails to initialize with memory allocation errors when running in a
typical kdump kernel.

Fixes: cf6daed098 ("bnxt_en: Increase context memory allocations on 57500 chips for RDMA.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2019-05-22 19:12:56 -04:00 committed by David S. Miller
parent 1b3f0b75c3
commit d629522e1d
2 changed files with 5 additions and 3 deletions
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4
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -6379,7 +6379,7 @@ static int bnxt_alloc_ctx_mem(struct bnxt *bp)
if (!ctx || (ctx->flags & BNXT_CTX_FLAG_INITED))
return 0;
if (bp->flags & BNXT_FLAG_ROCE_CAP) {
if ((bp->flags & BNXT_FLAG_ROCE_CAP) && !is_kdump_kernel()) {
pg_lvl = 2;
extra_qps = 65536;
extra_srqs = 8192;
@ -10437,7 +10437,7 @@ static int bnxt_set_dflt_rings(struct bnxt *bp, bool sh)
if (sh)
bp->flags |= BNXT_FLAG_SHARED_RINGS;
dflt_rings = netif_get_num_default_rss_queues();
dflt_rings = is_kdump_kernel() ? 1 : netif_get_num_default_rss_queues();
/* Reduce default rings on multi-port cards so that total default
* rings do not exceed CPU count.
*/

4
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -20,6 +20,7 @@
#include <linux/interrupt.h>
#include <linux/rhashtable.h>
#include <linux/crash_dump.h>
#include <net/devlink.h>
#include <net/dst_metadata.h>
#include <net/xdp.h>
@ -1369,7 +1370,8 @@ struct bnxt {
#define BNXT_CHIP_TYPE_NITRO_A0(bp) ((bp)->flags & BNXT_FLAG_CHIP_NITRO_A0)
#define BNXT_RX_PAGE_MODE(bp) ((bp)->flags & BNXT_FLAG_RX_PAGE_MODE)
#define BNXT_SUPPORTS_TPA(bp) (!BNXT_CHIP_TYPE_NITRO_A0(bp) && \
!(bp->flags & BNXT_FLAG_CHIP_P5))
!(bp->flags & BNXT_FLAG_CHIP_P5) && \
!is_kdump_kernel())
/* Chip class phase 5 */
#define BNXT_CHIP_P5(bp) \