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src/freedreno/common/freedreno_pm4.h

@@ -0,0 +1,124 @@
+/*
+ * Copyright © 2012-2018 Rob Clark <[email protected]>
+ * SPDX-License-Identifier: MIT
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#ifndef FREEDRENO_PM4_H_
+#define FREEDRENO_PM4_H_
+
+#include <stdint.h>
+
+#include "adreno_pm4.xml.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CP_NOP_MESG 0x4D455347
+#define CP_NOP_BEGN 0x4245474E
+#define CP_NOP_END  0x454E4400
+
+/*
+ * Helpers for pm4 pkt header building/parsing:
+ */
+
+static inline unsigned
+pm4_odd_parity_bit(unsigned val)
+{
+   /* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel
+    * note that we want odd parity so 0x6996 is inverted.
+    */
+   val ^= val >> 16;
+   val ^= val >> 8;
+   val ^= val >> 4;
+   val &= 0xf;
+   return (~0x6996 >> val) & 1;
+}
+
+static inline uint32_t
+pm4_pkt0_hdr(uint16_t regindx, uint16_t cnt)
+{
+   return CP_TYPE0_PKT | ((cnt - 1) << 16) | (regindx & 0x7fff);
+}
+
+static inline uint32_t
+pm4_pkt3_hdr(uint8_t opcode, uint16_t cnt)
+{
+   return CP_TYPE3_PKT | ((cnt - 1) << 16) | ((opcode & 0xff) << 8);
+}
+
+static inline uint32_t
+pm4_pkt4_hdr(uint16_t regindx, uint16_t cnt)
+{
+   assert(cnt < 0x7f);
+   assert (cnt > 0);
+   assert(regindx);
+   return CP_TYPE4_PKT | cnt | (pm4_odd_parity_bit(cnt) << 7) |
+         ((regindx & 0x3ffff) << 8) |
+         ((pm4_odd_parity_bit(regindx) << 27));
+}
+
+static inline uint32_t
+pm4_pkt7_hdr(uint8_t opcode, uint16_t cnt)
+{
+   return CP_TYPE7_PKT | cnt | (pm4_odd_parity_bit(cnt) << 15) |
+         ((opcode & 0x7f) << 16) |
+         ((pm4_odd_parity_bit(opcode) << 23));
+}
+
+/*
+ * Helpers for packet parsing:
+ */
+
+#define pkt_is_type0(pkt)     (((pkt)&0XC0000000) == CP_TYPE0_PKT)
+#define type0_pkt_size(pkt)   ((((pkt) >> 16) & 0x3FFF) + 1)
+#define type0_pkt_offset(pkt) ((pkt)&0x7FFF)
+
+#define pkt_is_type2(pkt) ((pkt) == CP_TYPE2_PKT)
+
+#define pkt_is_type3(pkt)                                                      \
+   ((((pkt)&0xC0000000) == CP_TYPE3_PKT) && (((pkt)&0x80FE) == 0))
+
+#define cp_type3_opcode(pkt) (((pkt) >> 8) & 0xFF)
+#define type3_pkt_size(pkt)  ((((pkt) >> 16) & 0x3FFF) + 1)
+
+static inline unsigned
+pm4_calc_odd_parity_bit(unsigned val)
+{
+   return (0x9669 >> (0xf & ((val) ^ ((val) >> 4) ^ ((val) >> 8) ^
+                             ((val) >> 12) ^ ((val) >> 16) ^ ((val) >> 20) ^
+                             ((val) >> 24) ^ ((val) >> 28)))) &
+          1;
+}
+
+#define pkt_is_type4(pkt)                                                      \
+   ((((pkt)&0xF0000000) == CP_TYPE4_PKT) &&                                    \
+    ((((pkt) >> 27) & 0x1) ==                                                  \
+     pm4_calc_odd_parity_bit(type4_pkt_offset(pkt))) &&                        \
+    ((((pkt) >> 7) & 0x1) == pm4_calc_odd_parity_bit(type4_pkt_size(pkt))))
+
+#define type4_pkt_offset(pkt) (((pkt) >> 8) & 0x7FFFF)
+#define type4_pkt_size(pkt)   ((pkt)&0x7F)
+
+#define pkt_is_type7(pkt)                                                      \
+   ((((pkt)&0xF0000000) == CP_TYPE7_PKT) && (((pkt)&0x0F000000) == 0) &&       \
+    ((((pkt) >> 23) & 0x1) ==                                                  \
+     pm4_calc_odd_parity_bit(cp_type7_opcode(pkt))) &&                         \
+    ((((pkt) >> 15) & 0x1) == pm4_calc_odd_parity_bit(type7_pkt_size(pkt))))
+
+#define cp_type7_opcode(pkt) (((pkt) >> 16) & 0x7F)
+#define type7_pkt_size(pkt)  ((pkt)&0x3FFF)
+
+#define pkt_field_get(reg_field, pkt)                                          \
+   (((pkt)&CONCAT2(reg_field, __MASK)) >> CONCAT2(reg_field, __SHIFT))
+#define pkt_field_set(reg_field, pkt, new_val)                                 \
+   (((pkt) & ~CONCAT2(reg_field, __MASK)) | reg_field(new_val))
+
+#ifdef __cplusplus
+} /* end of extern "C" */
+#endif
+
+#endif /* FREEDRENO_PM4_H_ */