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Date: Wed, 20 Jul 2022 14:15:18 +0300
From: Oded Gabbay <ogabbay@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Ohad Sharabi <osharabi@...ana.ai>
Subject: [PATCH 4/9] habanalabs: add return code field to module iterator
From: Ohad Sharabi <osharabi@...ana.ai>
Up until now the module iterator called void callback functions
and so caller activating callback that may fail suffered from 2 issues:
1. The need to "plant" return called in the private data. This is a
drawback since the iterator itself should not be aware of the private
data of the caller.
2. Due to 1 even in a failure the iterator would keep iterating instead
of break upon error.
To overcome this an optional rc field added to the iterator context.
Signed-off-by: Ohad Sharabi <osharabi@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
drivers/misc/habanalabs/common/habanalabs.h | 7 +++--
drivers/misc/habanalabs/gaudi2/gaudi2.c | 26 +++++++++++++------
.../misc/habanalabs/gaudi2/gaudi2_security.c | 19 +++++++-------
3 files changed, 32 insertions(+), 20 deletions(-)
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 6d7b66cd50f1..8c2c94fb1322 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -208,6 +208,7 @@ enum hl_protection_levels {
* struct iterate_module_ctx - HW module iterator
* @fn: function to apply to each HW module instance
* @data: optional internal data to the function iterator
+ * @rc: return code for optional use of iterator/iterator-caller
*/
struct iterate_module_ctx {
/*
@@ -217,10 +218,12 @@ struct iterate_module_ctx {
* @inst: HW module instance within the block
* @offset: current HW module instance offset from the 1-st HW module instance
* in the 1-st block
- * @data: function specific data
+ * @ctx: the iterator context.
*/
- void (*fn)(struct hl_device *hdev, int block, int inst, u32 offset, void *data);
+ void (*fn)(struct hl_device *hdev, int block, int inst, u32 offset,
+ struct iterate_module_ctx *ctx);
void *data;
+ int rc;
};
struct hl_block_glbl_sec {
diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2.c b/drivers/misc/habanalabs/gaudi2/gaudi2.c
index 465d9c319c3c..3531a339e742 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2.c
@@ -1712,6 +1712,9 @@ void gaudi2_iterate_tpcs(struct hl_device *hdev, struct iterate_module_ctx *ctx)
int dcore, inst, tpc_seq;
u32 offset;
+ /* init the return code */
+ ctx->rc = 0;
+
for (dcore = 0; dcore < NUM_OF_DCORES; dcore++) {
for (inst = 0; inst < NUM_OF_TPC_PER_DCORE; inst++) {
tpc_seq = dcore * NUM_OF_TPC_PER_DCORE + inst;
@@ -1721,7 +1724,12 @@ void gaudi2_iterate_tpcs(struct hl_device *hdev, struct iterate_module_ctx *ctx)
offset = (DCORE_OFFSET * dcore) + (DCORE_TPC_OFFSET * inst);
- ctx->fn(hdev, dcore, inst, offset, ctx->data);
+ ctx->fn(hdev, dcore, inst, offset, ctx);
+ if (ctx->rc) {
+ dev_err(hdev->dev, "TPC iterator failed for DCORE%d TPC%d\n",
+ dcore, inst);
+ return;
+ }
}
}
@@ -1730,7 +1738,9 @@ void gaudi2_iterate_tpcs(struct hl_device *hdev, struct iterate_module_ctx *ctx)
/* special check for PCI TPC (DCORE0_TPC6) */
offset = DCORE_TPC_OFFSET * (NUM_DCORE0_TPC - 1);
- ctx->fn(hdev, 0, NUM_DCORE0_TPC - 1, offset, ctx->data);
+ ctx->fn(hdev, 0, NUM_DCORE0_TPC - 1, offset, ctx);
+ if (ctx->rc)
+ dev_err(hdev->dev, "TPC iterator failed for DCORE0 TPC6\n");
}
static bool gaudi2_host_phys_addr_valid(u64 addr)
@@ -4507,10 +4517,10 @@ struct gaudi2_tpc_init_cfg_data {
};
static void gaudi2_init_tpc_config(struct hl_device *hdev, int dcore, int inst,
- u32 offset, void *data)
+ u32 offset, struct iterate_module_ctx *ctx)
{
struct gaudi2_device *gaudi2 = hdev->asic_specific;
- struct gaudi2_tpc_init_cfg_data *cfg_data = data;
+ struct gaudi2_tpc_init_cfg_data *cfg_data = ctx->data;
u32 queue_id_base;
u8 seq;
@@ -6155,9 +6165,9 @@ static int gaudi2_compute_reset_late_init(struct hl_device *hdev)
}
static void gaudi2_is_tpc_engine_idle(struct hl_device *hdev, int dcore, int inst, u32 offset,
- void *data)
+ struct iterate_module_ctx *ctx)
{
- struct gaudi2_tpc_idle_data *idle_data = (struct gaudi2_tpc_idle_data *)data;
+ struct gaudi2_tpc_idle_data *idle_data = ctx->data;
u32 tpc_cfg_sts, qm_glbl_sts0, qm_glbl_sts1, qm_cgm_sts;
bool is_eng_idle;
int engine_idx;
@@ -6736,9 +6746,9 @@ static int gaudi2_mmu_shared_prepare(struct hl_device *hdev, u32 asid)
}
static void gaudi2_tpc_mmu_prepare(struct hl_device *hdev, int dcore, int inst, u32 offset,
- void *data)
+ struct iterate_module_ctx *ctx)
{
- struct gaudi2_tpc_mmu_data *mmu_data = (struct gaudi2_tpc_mmu_data *)data;
+ struct gaudi2_tpc_mmu_data *mmu_data = ctx->data;
WREG32(mmDCORE0_TPC0_CFG_AXUSER_HB_MMU_BP + offset, 0);
WREG32(mmDCORE0_TPC0_CFG_AXUSER_HB_ASID + offset, mmu_data->rw_asid);
diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2_security.c b/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
index 89a06ff5ba34..c4165db06db2 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
@@ -2583,9 +2583,9 @@ struct gaudi2_tpc_pb_data {
};
static void gaudi2_config_tpcs_glbl_sec(struct hl_device *hdev, int dcore, int inst, u32 offset,
- void *data)
+ struct iterate_module_ctx *ctx)
{
- struct gaudi2_tpc_pb_data *pb_data = (struct gaudi2_tpc_pb_data *)data;
+ struct gaudi2_tpc_pb_data *pb_data = ctx->data;
hl_config_glbl_sec(hdev, gaudi2_pb_dcr0_tpc0, pb_data->glbl_sec,
offset, pb_data->block_array_size);
@@ -2660,15 +2660,14 @@ static int gaudi2_init_pb_tpc(struct hl_device *hdev)
struct gaudi2_tpc_arc_pb_data {
u32 unsecured_regs_arr_size;
u32 arc_regs_arr_size;
- int rc;
};
static void gaudi2_config_tpcs_pb_ranges(struct hl_device *hdev, int dcore, int inst, u32 offset,
- void *data)
+ struct iterate_module_ctx *ctx)
{
- struct gaudi2_tpc_arc_pb_data *pb_data = (struct gaudi2_tpc_arc_pb_data *)data;
+ struct gaudi2_tpc_arc_pb_data *pb_data = ctx->data;
- pb_data->rc |= hl_init_pb_ranges(hdev, HL_PB_SHARED, HL_PB_NA, 1,
+ ctx->rc = hl_init_pb_ranges(hdev, HL_PB_SHARED, HL_PB_NA, 1,
offset, gaudi2_pb_dcr0_tpc0_arc,
pb_data->arc_regs_arr_size,
gaudi2_pb_dcr0_tpc0_arc_unsecured_regs,
@@ -2683,12 +2682,12 @@ static int gaudi2_init_pb_tpc_arc(struct hl_device *hdev)
tpc_arc_pb_data.arc_regs_arr_size = ARRAY_SIZE(gaudi2_pb_dcr0_tpc0_arc);
tpc_arc_pb_data.unsecured_regs_arr_size =
ARRAY_SIZE(gaudi2_pb_dcr0_tpc0_arc_unsecured_regs);
- tpc_arc_pb_data.rc = 0;
+
tpc_iter.fn = &gaudi2_config_tpcs_pb_ranges;
tpc_iter.data = &tpc_arc_pb_data;
gaudi2_iterate_tpcs(hdev, &tpc_iter);
- return tpc_arc_pb_data.rc;
+ return tpc_iter.rc;
}
static int gaudi2_init_pb_sm_objs(struct hl_device *hdev)
@@ -3547,9 +3546,9 @@ struct gaudi2_ack_pb_tpc_data {
};
static void gaudi2_ack_pb_tpc_config(struct hl_device *hdev, int dcore, int inst, u32 offset,
- void *data)
+ struct iterate_module_ctx *ctx)
{
- struct gaudi2_ack_pb_tpc_data *pb_data = (struct gaudi2_ack_pb_tpc_data *)data;
+ struct gaudi2_ack_pb_tpc_data *pb_data = ctx->data;
hl_ack_pb_single_dcore(hdev, offset, HL_PB_SINGLE_INSTANCE, HL_PB_NA,
gaudi2_pb_dcr0_tpc0, pb_data->tpc_regs_array_size);
--
2.25.1
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