habanalabs/gaudi2: allow user to flush PCIE by read

In order for the user to flush PCIE he needs to read some register
from PCIE block. The chosen register is SPECIAL_GLBL_SPARE_0 and
hence needs to be unsecured.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

3 files changed, 192 insertions, 1 deletions

diff --git a/drivers/misc/habanalabs/gaudi2/gaudi2_security.c b/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
index c4165db06db2..c6906fb14229 100644
--- a/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
+++ b/drivers/misc/habanalabs/gaudi2/gaudi2_security.c
@@ -2559,6 +2559,10 @@ static const u32 gaudi2_pb_pcie[] = {
 	mmPCIE_WRAP_BASE,
 };
 
+static const u32 gaudi2_pb_pcie_unsecured_regs[] = {
+	mmPCIE_WRAP_SPECIAL_GLBL_SPARE_0,
+};
+
 static const u32 gaudi2_pb_thermal_sensor0[] = {
 	mmDCORE0_XFT_BASE,
 	mmDCORE0_TSTDVS_BASE,
@@ -3418,7 +3422,8 @@ static int gaudi2_init_protection_bits(struct hl_device *hdev)
 	rc |= hl_init_pb(hdev, HL_PB_SHARED, HL_PB_NA,
 			HL_PB_SINGLE_INSTANCE, HL_PB_NA,
 			gaudi2_pb_pcie, ARRAY_SIZE(gaudi2_pb_pcie),
-			NULL, HL_PB_NA);
+			gaudi2_pb_pcie_unsecured_regs,
+			ARRAY_SIZE(gaudi2_pb_pcie_unsecured_regs));
 
 	/* Thermal Sensor.
 	 * Skip when security is enabled in F/W, because the blocks are protected by privileged RR.
diff --git a/drivers/misc/habanalabs/include/gaudi2/asic_reg/gaudi2_regs.h b/drivers/misc/habanalabs/include/gaudi2/asic_reg/gaudi2_regs.h
index bfda4223bdc8..6aa1b1412462 100644
--- a/drivers/misc/habanalabs/include/gaudi2/asic_reg/gaudi2_regs.h
+++ b/drivers/misc/habanalabs/include/gaudi2/asic_reg/gaudi2_regs.h
@@ -132,6 +132,7 @@
 #include "dcore0_mme_ctrl_lo_arch_tensor_a_regs.h"
 #include "dcore0_mme_ctrl_lo_arch_tensor_b_regs.h"
 #include "dcore0_mme_ctrl_lo_arch_tensor_cout_regs.h"
+#include "pcie_wrap_special_regs.h"
 
 #include "pdma0_qm_masks.h"
 #include "pdma0_core_masks.h"
diff --git a/drivers/misc/habanalabs/include/gaudi2/asic_reg/pcie_wrap_special_regs.h b/drivers/misc/habanalabs/include/gaudi2/asic_reg/pcie_wrap_special_regs.h
new file mode 100644
index 000000000000..46558e7a7f63
--- /dev/null
+++ b/drivers/misc/habanalabs/include/gaudi2/asic_reg/pcie_wrap_special_regs.h
@@ -0,0 +1,185 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright 2016-2020 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ *
+ */
+
+/************************************
+ ** This is an auto-generated file **
+ **       DO NOT EDIT BELOW        **
+ ************************************/
+
+#ifndef ASIC_REG_PCIE_WRAP_SPECIAL_REGS_H_
+#define ASIC_REG_PCIE_WRAP_SPECIAL_REGS_H_
+
+/*
+ *****************************************
+ *   PCIE_WRAP_SPECIAL
+ *   (Prototype: SPECIAL_REGS)
+ *****************************************
+ */
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_0 0x4C01E80
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_1 0x4C01E84
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_2 0x4C01E88
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_3 0x4C01E8C
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_4 0x4C01E90
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_5 0x4C01E94
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_6 0x4C01E98
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_7 0x4C01E9C
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_8 0x4C01EA0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_9 0x4C01EA4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_10 0x4C01EA8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_11 0x4C01EAC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_12 0x4C01EB0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_13 0x4C01EB4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_14 0x4C01EB8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_15 0x4C01EBC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_16 0x4C01EC0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_17 0x4C01EC4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_18 0x4C01EC8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_19 0x4C01ECC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_20 0x4C01ED0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_21 0x4C01ED4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_22 0x4C01ED8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_23 0x4C01EDC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_24 0x4C01EE0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_25 0x4C01EE4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_26 0x4C01EE8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_27 0x4C01EEC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_28 0x4C01EF0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_29 0x4C01EF4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_30 0x4C01EF8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_PRIV_31 0x4C01EFC
+
+#define mmPCIE_WRAP_SPECIAL_MEM_GW_DATA 0x4C01F00
+
+#define mmPCIE_WRAP_SPECIAL_MEM_GW_REQ 0x4C01F04
+
+#define mmPCIE_WRAP_SPECIAL_MEM_NUMOF 0x4C01F0C
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_SEL 0x4C01F10
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_CTL 0x4C01F14
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_ERR_MASK 0x4C01F18
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_GLBL_ERR_MASK 0x4C01F1C
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_ERR_STS 0x4C01F20
+
+#define mmPCIE_WRAP_SPECIAL_MEM_ECC_ERR_ADDR 0x4C01F24
+
+#define mmPCIE_WRAP_SPECIAL_MEM_RM 0x4C01F28
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_ERR_MASK 0x4C01F40
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_ERR_ADDR 0x4C01F44
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_ERR_CAUSE 0x4C01F48
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SPARE_0 0x4C01F60
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SPARE_1 0x4C01F64
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SPARE_2 0x4C01F68
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SPARE_3 0x4C01F6C
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_0 0x4C01F80
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_1 0x4C01F84
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_2 0x4C01F88
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_3 0x4C01F8C
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_4 0x4C01F90
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_5 0x4C01F94
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_6 0x4C01F98
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_7 0x4C01F9C
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_8 0x4C01FA0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_9 0x4C01FA4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_10 0x4C01FA8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_11 0x4C01FAC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_12 0x4C01FB0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_13 0x4C01FB4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_14 0x4C01FB8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_15 0x4C01FBC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_16 0x4C01FC0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_17 0x4C01FC4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_18 0x4C01FC8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_19 0x4C01FCC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_20 0x4C01FD0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_21 0x4C01FD4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_22 0x4C01FD8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_23 0x4C01FDC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_24 0x4C01FE0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_25 0x4C01FE4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_26 0x4C01FE8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_27 0x4C01FEC
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_28 0x4C01FF0
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_29 0x4C01FF4
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_30 0x4C01FF8
+
+#define mmPCIE_WRAP_SPECIAL_GLBL_SEC_31 0x4C01FFC
+
+#endif /* ASIC_REG_PCIE_WRAP_SPECIAL_REGS_H_ */