9169b77cd3
1.libhns: Support reporting wc as software mode 2.libhns: return error when post send in reset state 3.libhns: separate the initialization steps of lock 4.libhns: assign doorbell to zero when allocate it 5.libhns: Fix missing reset notification Signed-off-by: Juan Zhou <zhoujuan51@h-partners.com> (cherry picked from commit e1b479184479d826a5f78b43e832c667e138ca72)
93 lines
3.0 KiB
Diff
93 lines
3.0 KiB
Diff
From de7b9a04b5bfd5cf40cc6c89dae3757f1823432a Mon Sep 17 00:00:00 2001
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From: Chengchang Tang <tangchengchang@huawei.com>
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Date: Tue, 26 Sep 2023 19:19:10 +0800
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Subject: [PATCH 5/5] libhns: Fix missing reset notification.
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driver inclusion
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category: bugfix
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bugzilla: https://gitee.com/src-openeuler/rdma-core/issues/I83L7U
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----------------------------------------------------------
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Currently, userspace driver get the reset notification by reading a
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a shared variable which would be set to non-zero during reset. However,
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if the user does not call driver's IO interface during reset, the reset
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notification will be ignored. because this variable will be clear after
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completes the reset.
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This patch use a new reset flag to get whether the driver has been reset
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at any time. A non-zero value will be assigned to this new reset
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flag by default, which will permanently become 0 once a reset occurs.
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During reset, the kernel space driver will assign 0 to this variable.
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After reset, this variable will be remapped to a page of all zeros. The
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userspace driver can judge whether the driver has been reset by whether
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this variable is 0.
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Fixes: 34f2ad8085c2 ("libhns: Add reset stop flow mechanism")
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Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
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---
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providers/hns/hns_roce_u.c | 4 ++++
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providers/hns/hns_roce_u.h | 2 ++
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providers/hns/hns_roce_u_hw_v2.c | 3 +++
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3 files changed, 9 insertions(+)
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diff --git a/providers/hns/hns_roce_u.c b/providers/hns/hns_roce_u.c
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index 87f9ed8..0660081 100644
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--- a/providers/hns/hns_roce_u.c
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+++ b/providers/hns/hns_roce_u.c
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@@ -226,6 +226,7 @@ static int init_reset_context(struct hns_roce_context *ctx, int cmd_fd,
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int page_size)
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{
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uint64_t reset_mmap_key = resp->reset_mmap_key;
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+ struct hns_roce_v2_reset_state *state;
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/* The reset mmap key is 0, which means it is not supported. */
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if (reset_mmap_key == 0)
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@@ -236,6 +237,9 @@ static int init_reset_context(struct hns_roce_context *ctx, int cmd_fd,
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if (ctx->reset_state == MAP_FAILED)
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return -ENOMEM;
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+ state = ctx->reset_state;
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+ ctx->use_new_reset_flag = state->hw_ready;
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+
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return 0;
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}
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diff --git a/providers/hns/hns_roce_u.h b/providers/hns/hns_roce_u.h
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index b3f21ba..5501d8e 100644
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--- a/providers/hns/hns_roce_u.h
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+++ b/providers/hns/hns_roce_u.h
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@@ -235,6 +235,7 @@ struct hns_roce_dca_ctx {
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struct hns_roce_v2_reset_state {
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uint32_t is_reset;
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+ uint32_t hw_ready;
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};
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struct hns_roce_cmd_flag {
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@@ -278,6 +279,7 @@ struct hns_roce_context {
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struct hns_roce_dca_ctx dca_ctx;
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+ bool use_new_reset_flag;
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bool reseted;
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};
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diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
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index 29b6268..ac40d5d 100644
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--- a/providers/hns/hns_roce_u_hw_v2.c
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+++ b/providers/hns/hns_roce_u_hw_v2.c
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@@ -1011,6 +1011,9 @@ static bool hns_roce_reseted(struct hns_roce_context *ctx)
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{
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struct hns_roce_v2_reset_state *state = ctx->reset_state;
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+ if (ctx->use_new_reset_flag)
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+ return !state->hw_ready;
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+
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if (state && state->is_reset)
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ctx->reseted = true;
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--
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2.25.1
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