[Skiboot] [PATCH v2 4/5] npu2: Don't open code NPU2_RELAXED_ORDERING_CFG2

[Reza Arbab]

Make the code that initializes these registers more descriptive by
using macros instead of open coded literals. No functional change.

Signed-off-by: Reza Arbab <arbab at linux.ibm.com>
Reviewed-By: Alistair Popple <alistair at popple.id.au>
---
 hw/npu2.c           | 31 +++++++++++++------------------
 include/npu2-regs.h |  2 ++
 2 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/hw/npu2.c b/hw/npu2.c
index acd56c1..9748536 100644
--- a/hw/npu2.c
+++ b/hw/npu2.c
@@ -857,7 +857,8 @@ static void npu2_mcd_init(struct npu2 *p)
 
 static void npu2_hw_init(struct npu2 *p)
 {
-	uint64_t val;
+	uint64_t reg, val;
+	int s, b;
 
 	npu2_ioda_reset(&p->phb_nvlink, false);
 
@@ -916,6 +917,17 @@ static void npu2_hw_init(struct npu2 *p)
 		NPU2DBG(p, "Using large memory map + MCD disabled\n");
 		p->gpu_map_type = GPU_MEM_4T_DOWN;
 	}
+
+	/* Static initialization of every relaxed-ordering cfg[2] register */
+	val = NPU2_RELAXED_ORDERING_CMD_CL_RD_NC_F0 |
+	      NPU2_RELAXED_ORDERING_SOURCE4_RDENA;
+
+	for (s = NPU2_STACK_STCK_0; s <= NPU2_STACK_STCK_2; s++) {
+		for (b = NPU2_BLOCK_SM_0; b <= NPU2_BLOCK_SM_3; b++) {
+			reg = NPU2_REG_OFFSET(s, b, NPU2_RELAXED_ORDERING_CFG2);
+			npu2_write(p, reg, val);
+		}
+	}
 }
 
 static int64_t npu2_map_pe_dma_window_real(struct phb *phb,
@@ -1416,23 +1428,6 @@ static void npu2_probe_phb(struct dt_node *dn)
 	xscom_write_mask(gcid, 0x5011510, val, val);
 	xscom_write_mask(gcid, 0x5011530, val, val);
 
-	/*
-	 * Enable relaxed ordering for peer-to-peer reads
-	 */
-	val = PPC_BIT(5) | PPC_BIT(29);
-	xscom_write_mask(gcid, 0x501100c, val, val);
-	xscom_write_mask(gcid, 0x501103c, val, val);
-	xscom_write_mask(gcid, 0x501106c, val, val);
-	xscom_write_mask(gcid, 0x501109c, val, val);
-	xscom_write_mask(gcid, 0x501120c, val, val);
-	xscom_write_mask(gcid, 0x501123c, val, val);
-	xscom_write_mask(gcid, 0x501126c, val, val);
-	xscom_write_mask(gcid, 0x501129c, val, val);
-	xscom_write_mask(gcid, 0x501140c, val, val);
-	xscom_write_mask(gcid, 0x501143c, val, val);
-	xscom_write_mask(gcid, 0x501146c, val, val);
-	xscom_write_mask(gcid, 0x501149c, val, val);
-
 	val = PPC_BIT(6) | PPC_BIT(7) | PPC_BIT(11);
 	xscom_write_mask(gcid, 0x5011009, val, PPC_BITMASK(6,11));
 	xscom_write_mask(gcid, 0x5011039, val, PPC_BITMASK(6,11));
diff --git a/include/npu2-regs.h b/include/npu2-regs.h
index 4a17ac8..d9db988 100644
--- a/include/npu2-regs.h
+++ b/include/npu2-regs.h
@@ -155,6 +155,8 @@ void npu2_scom_write(uint64_t gcid, uint64_t scom_base,
 #define NPU2_RELAXED_ORDERING_CFG0		0x050
 #define NPU2_RELAXED_ORDERING_CFG1		0x058
 #define NPU2_RELAXED_ORDERING_CFG2		0x060
+#define   NPU2_RELAXED_ORDERING_CMD_CL_RD_NC_F0	PPC_BIT(5)
+#define   NPU2_RELAXED_ORDERING_SOURCE4_RDENA	PPC_BIT(29)
 #define NPU2_NTL0_BAR				0x068
 #define NPU2_NTL1_BAR				0x070
 #define   NPU2_NTL_BAR_ENABLE			PPC_BIT(0)
-- 
1.8.3.1