1 /* Copyright 2013-2015 Freescale Semiconductor Inc. 2 * 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 #ifndef __FSL_MC_CMD_H 6 #define __FSL_MC_CMD_H 7 8 #define MC_CMD_NUM_OF_PARAMS 7 9 10 #define MAKE_UMASK64(_width) \ 11 ((uint64_t)((_width) < 64 ? ((uint64_t)1 << (_width)) - 1 : -1)) 12 13 static inline uint64_t mc_enc(int lsoffset, int width, uint64_t val) 14 { 15 return (uint64_t)(((uint64_t)val & MAKE_UMASK64(width)) << lsoffset); 16 } 17 static inline uint64_t mc_dec(uint64_t val, int lsoffset, int width) 18 { 19 return (uint64_t)((val >> lsoffset) & MAKE_UMASK64(width)); 20 } 21 22 struct mc_command { 23 uint64_t header; 24 uint64_t params[MC_CMD_NUM_OF_PARAMS]; 25 }; 26 27 enum mc_cmd_status { 28 MC_CMD_STATUS_OK = 0x0, /*!< Completed successfully */ 29 MC_CMD_STATUS_READY = 0x1, /*!< Ready to be processed */ 30 MC_CMD_STATUS_AUTH_ERR = 0x3, /*!< Authentication error */ 31 MC_CMD_STATUS_NO_PRIVILEGE = 0x4, /*!< No privilege */ 32 MC_CMD_STATUS_DMA_ERR = 0x5, /*!< DMA or I/O error */ 33 MC_CMD_STATUS_CONFIG_ERR = 0x6, /*!< Configuration error */ 34 MC_CMD_STATUS_TIMEOUT = 0x7, /*!< Operation timed out */ 35 MC_CMD_STATUS_NO_RESOURCE = 0x8, /*!< No resources */ 36 MC_CMD_STATUS_NO_MEMORY = 0x9, /*!< No memory available */ 37 MC_CMD_STATUS_BUSY = 0xA, /*!< Device is busy */ 38 MC_CMD_STATUS_UNSUPPORTED_OP = 0xB, /*!< Unsupported operation */ 39 MC_CMD_STATUS_INVALID_STATE = 0xC /*!< Invalid state */ 40 }; 41 42 /* 43 * MC command flags 44 */ 45 46 /* High priority flag */ 47 #define MC_CMD_FLAG_PRI 0x00008000 48 /* No flags */ 49 #define MC_CMD_NO_FLAGS 0x00000000 50 /* Command completion flag */ 51 #define MC_CMD_FLAG_INTR_DIS 0x01000000 52 53 54 #define MC_CMD_HDR_CMDID_O 52 /* Command ID field offset */ 55 #define MC_CMD_HDR_CMDID_S 12 /* Command ID field size */ 56 #define MC_CMD_HDR_STATUS_O 16 /* Status field offset */ 57 #define MC_CMD_HDR_TOKEN_O 38 /* Token field offset */ 58 #define MC_CMD_HDR_TOKEN_S 10 /* Token field size */ 59 #define MC_CMD_HDR_STATUS_S 8 /* Status field size*/ 60 #define MC_CMD_HDR_FLAGS_O 0 /* Flags field offset */ 61 #define MC_CMD_HDR_FLAGS_S 32 /* Flags field size*/ 62 #define MC_CMD_HDR_FLAGS_MASK 0xFF00FF00 /* Command flags mask */ 63 64 #define MC_CMD_HDR_READ_STATUS(_hdr) \ 65 ((enum mc_cmd_status)mc_dec((_hdr), \ 66 MC_CMD_HDR_STATUS_O, MC_CMD_HDR_STATUS_S)) 67 68 #define MC_CMD_HDR_READ_TOKEN(_hdr) \ 69 ((uint16_t)mc_dec((_hdr), MC_CMD_HDR_TOKEN_O, MC_CMD_HDR_TOKEN_S)) 70 71 #define MC_PREP_OP(_ext, _param, _offset, _width, _type, _arg) \ 72 ((_ext)[_param] |= cpu_to_le64(mc_enc((_offset), (_width), _arg))) 73 74 #define MC_EXT_OP(_ext, _param, _offset, _width, _type, _arg) \ 75 (_arg = (_type)mc_dec(cpu_to_le64(_ext[_param]), (_offset), (_width))) 76 77 #define MC_CMD_OP(_cmd, _param, _offset, _width, _type, _arg) \ 78 ((_cmd).params[_param] |= mc_enc((_offset), (_width), _arg)) 79 80 #define MC_RSP_OP(_cmd, _param, _offset, _width, _type, _arg) \ 81 (_arg = (_type)mc_dec(_cmd.params[_param], (_offset), (_width))) 82 83 static inline uint64_t mc_encode_cmd_header(uint16_t cmd_id, 84 uint32_t cmd_flags, 85 uint16_t token) 86 { 87 uint64_t hdr; 88 89 hdr = mc_enc(MC_CMD_HDR_CMDID_O, MC_CMD_HDR_CMDID_S, cmd_id); 90 hdr |= mc_enc(MC_CMD_HDR_FLAGS_O, MC_CMD_HDR_FLAGS_S, 91 (cmd_flags & MC_CMD_HDR_FLAGS_MASK)); 92 hdr |= mc_enc(MC_CMD_HDR_TOKEN_O, MC_CMD_HDR_TOKEN_S, token); 93 hdr |= mc_enc(MC_CMD_HDR_STATUS_O, MC_CMD_HDR_STATUS_S, 94 MC_CMD_STATUS_READY); 95 96 return hdr; 97 } 98 99 /** 100 * mc_write_command - writes a command to a Management Complex (MC) portal 101 * 102 * @portal: pointer to an MC portal 103 * @cmd: pointer to a filled command 104 */ 105 static inline void mc_write_command(struct mc_command __iomem *portal, 106 struct mc_command *cmd) 107 { 108 int i; 109 110 /* copy command parameters into the portal */ 111 for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++) 112 writeq(cmd->params[i], &portal->params[i]); 113 114 /* submit the command by writing the header */ 115 writeq(cmd->header, &portal->header); 116 } 117 118 /** 119 * mc_read_response - reads the response for the last MC command from a 120 * Management Complex (MC) portal 121 * 122 * @portal: pointer to an MC portal 123 * @resp: pointer to command response buffer 124 * 125 * Returns MC_CMD_STATUS_OK on Success; Error code otherwise. 126 */ 127 static inline enum mc_cmd_status mc_read_response( 128 struct mc_command __iomem *portal, 129 struct mc_command *resp) 130 { 131 int i; 132 enum mc_cmd_status status; 133 134 /* Copy command response header from MC portal: */ 135 resp->header = readq(&portal->header); 136 status = MC_CMD_HDR_READ_STATUS(resp->header); 137 if (status != MC_CMD_STATUS_OK) 138 return status; 139 140 /* Copy command response data from MC portal: */ 141 for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++) 142 resp->params[i] = readq(&portal->params[i]); 143 144 return status; 145 } 146 147 #endif /* __FSL_MC_CMD_H */ 148