accel/habanalabs: fix glbl error cause handling

The glbl error cause handling has a wrong assumption that all error
bits are consecutive.
Fix the handling to check all relevant error bits per ASIC.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Reviewed-by: Carl Vanderlip <quic_carlv@quicinc.com>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/accel/habanalabs/common/habanalabs.h

@@ -647,7 +647,7 @@ struct hl_hints_range {
  * @num_engine_cores: number of engine cpu cores.
  * @max_num_of_engines: maximum number of all engines in the ASIC.
  * @num_of_special_blocks: special_blocks array size.
- * @glbl_err_cause_num: global err cause number.
+ * @glbl_err_max_cause_num: global err max cause number.
  * @hbw_flush_reg: register to read to generate HBW flush. value of 0 means HBW flush is
  *                 not supported.
  * @reserved_fw_mem_size: size in MB of dram memory reserved for FW.
@@ -779,7 +779,7 @@ struct asic_fixed_properties {
 	u32				num_engine_cores;
 	u32				max_num_of_engines;
 	u32				num_of_special_blocks;
-	u32				glbl_err_cause_num;
+	u32				glbl_err_max_cause_num;
 	u32				hbw_flush_reg;
 	u32				reserved_fw_mem_size;
 	u16				collective_first_sob;

drivers/accel/habanalabs/common/security.c

@@ -7,15 +7,31 @@
 
 #include "habanalabs.h"
 
-static const char * const hl_glbl_error_cause[HL_MAX_NUM_OF_GLBL_ERR_CAUSE] = {
+static const char * const hl_glbl_error_cause[] = {
 	"Error due to un-priv read",
 	"Error due to un-secure read",
 	"Error due to read from unmapped reg",
 	"Error due to un-priv write",
 	"Error due to un-secure write",
 	"Error due to write to unmapped reg",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
 	"External I/F write sec violation",
 	"External I/F write to un-mapped reg",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
+	"N/A",
 	"Read to write only",
 	"Write to read only"
 };
@@ -671,10 +687,11 @@ static bool hl_check_block_range_exclusion(struct hl_device *hdev,
 static int hl_read_glbl_errors(struct hl_device *hdev,
 		u32 blk_idx, u32 major, u32 minor, u32 sub_minor, void *data)
 {
-	struct hl_special_block_info *special_blocks = hdev->asic_prop.special_blocks;
+	struct asic_fixed_properties *prop = &hdev->asic_prop;
+	struct hl_special_block_info *special_blocks = prop->special_blocks;
 	struct hl_special_block_info *current_block = &special_blocks[blk_idx];
 	u32 glbl_err_addr, glbl_err_cause, addr_val, cause_val, block_base,
-		base = current_block->base_addr - lower_32_bits(hdev->asic_prop.cfg_base_address);
+		base = current_block->base_addr - lower_32_bits(prop->cfg_base_address);
 	int i;
 
 	block_base = base + major * current_block->major_offset +
@@ -689,12 +706,12 @@ static int hl_read_glbl_errors(struct hl_device *hdev,
 	glbl_err_addr = block_base + HL_GLBL_ERR_ADDR_OFFSET;
 	addr_val = RREG32(glbl_err_addr);
 
-	for (i = 0 ; i < hdev->asic_prop.glbl_err_cause_num ; i++) {
+	for (i = 0 ; i <= prop->glbl_err_max_cause_num ; i++) {
 		if (cause_val & BIT(i))
 			dev_err_ratelimited(hdev->dev,
 					"%s, addr %#llx\n",
 					hl_glbl_error_cause[i],
-				hdev->asic_prop.cfg_base_address + block_base +
+					prop->cfg_base_address + block_base +
 						FIELD_GET(HL_GLBL_ERR_ADDRESS_MASK, addr_val));
 	}
 

drivers/accel/habanalabs/common/security.h

@@ -13,7 +13,6 @@
 struct hl_device;
 
 /* special blocks */
-#define HL_MAX_NUM_OF_GLBL_ERR_CAUSE		10
 #define HL_GLBL_ERR_ADDRESS_MASK	GENMASK(11, 0)
 /* GLBL_ERR_ADDR register offset from the start of the block */
 #define HL_GLBL_ERR_ADDR_OFFSET		0xF44

drivers/accel/habanalabs/gaudi2/gaudi2.c

@@ -164,6 +164,8 @@
 /* HW scrambles only bits 0-25 */
 #define HW_UNSCRAMBLED_BITS_MASK		GENMASK_ULL(63, 26)
 
+#define GAUDI2_GLBL_ERR_MAX_CAUSE_NUM		17
+
 struct gaudi2_razwi_info {
 	u32 axuser_xy;
 	u32 rtr_ctrl;
@@ -3587,7 +3589,7 @@ static int gaudi2_special_blocks_config(struct hl_device *hdev)
 	int i, rc;
 
 	/* Configure Special blocks */
-	prop->glbl_err_cause_num = GAUDI2_NUM_OF_GLBL_ERR_CAUSE;
+	prop->glbl_err_max_cause_num = GAUDI2_GLBL_ERR_MAX_CAUSE_NUM;
 	prop->num_of_special_blocks = ARRAY_SIZE(gaudi2_special_blocks);
 	prop->special_blocks = kmalloc_array(prop->num_of_special_blocks,
 			sizeof(*prop->special_blocks), GFP_KERNEL);

drivers/accel/habanalabs/gaudi2/gaudi2P.h

@@ -239,7 +239,6 @@
 
 #define GAUDI2_NUM_TESTED_QS		(GAUDI2_QUEUE_ID_CPU_PQ - GAUDI2_QUEUE_ID_PDMA_0_0)
 
-#define GAUDI2_NUM_OF_GLBL_ERR_CAUSE		8
 
 enum gaudi2_reserved_sob_id {
 	GAUDI2_RESERVED_SOB_CS_COMPLETION_FIRST,