-static int isst_send_mmio_command(unsigned int cpu, unsigned int reg, int write,
- unsigned int *value)
-{
- struct isst_if_io_regs io_regs;
- const char *pathname = "/dev/isst_interface";
- int cmd;
- FILE *outf = get_output_file();
- int fd;
-
- debug_printf("mmio_cmd cpu:%d reg:%d write:%d\n", cpu, reg, write);
-
- fd = open(pathname, O_RDWR);
- if (fd < 0)
- err(-1, "%s open failed", pathname);
-
- io_regs.req_count = 1;
- io_regs.io_reg[0].logical_cpu = cpu;
- io_regs.io_reg[0].reg = reg;
- cmd = ISST_IF_IO_CMD;
- if (write) {
- io_regs.io_reg[0].read_write = 1;
- io_regs.io_reg[0].value = *value;
- } else {
- io_regs.io_reg[0].read_write = 0;
- }
-
- if (ioctl(fd, cmd, &io_regs) == -1) {
- if (errno == ENOTTY) {
- perror("ISST_IF_IO_COMMAND\n");
- fprintf(stderr, "Check presence of kernel modules: isst_if_mmio\n");
- exit(0);
- }
- fprintf(outf, "Error: mmio_cmd cpu:%d reg:%x read_write:%x\n",
- cpu, reg, write);
- } else {
- if (!write)
- *value = io_regs.io_reg[0].value;
-
- debug_printf(
- "mmio_cmd response: cpu:%d reg:%x rd_write:%x resp:%x\n",
- cpu, reg, write, *value);
- }
-
- close(fd);
-
- return 0;
-}
-
-int isst_send_mbox_command(unsigned int cpu, unsigned char command,
- unsigned char sub_command, unsigned int parameter,
- unsigned int req_data, unsigned int *resp)
-{
- const char *pathname = "/dev/isst_interface";
- int fd, retry;
- struct isst_if_mbox_cmds mbox_cmds = { 0 };
-
- debug_printf(
- "mbox_send: cpu:%d command:%x sub_command:%x parameter:%x req_data:%x\n",
- cpu, command, sub_command, parameter, req_data);
-
- if (!is_skx_based_platform() && command == CONFIG_CLOS &&
- sub_command != CLOS_PM_QOS_CONFIG) {
- unsigned int value;
- int write = 0;
- int clos_id, core_id, ret = 0;
-
- debug_printf("CPU %d\n", cpu);
-
- if (parameter & BIT(MBOX_CMD_WRITE_BIT)) {
- value = req_data;
- write = 1;
- }
-
- switch (sub_command) {
- case CLOS_PQR_ASSOC:
- core_id = parameter & 0xff;
- ret = isst_send_mmio_command(
- cpu, PQR_ASSOC_OFFSET + core_id * 4, write,
- &value);
- if (!ret && !write)
- *resp = value;
- break;
- case CLOS_PM_CLOS:
- clos_id = parameter & 0x03;
- ret = isst_send_mmio_command(
- cpu, PM_CLOS_OFFSET + clos_id * 4, write,
- &value);
- if (!ret && !write)
- *resp = value;
- break;
- case CLOS_STATUS:
- break;
- default:
- break;
- }
- return ret;
- }
-
- mbox_cmds.cmd_count = 1;
- mbox_cmds.mbox_cmd[0].logical_cpu = cpu;
- mbox_cmds.mbox_cmd[0].command = command;
- mbox_cmds.mbox_cmd[0].sub_command = sub_command;
- mbox_cmds.mbox_cmd[0].parameter = parameter;
- mbox_cmds.mbox_cmd[0].req_data = req_data;
-
- if (mbox_delay)
- usleep(mbox_delay * 1000);
-
- fd = open(pathname, O_RDWR);
- if (fd < 0)
- err(-1, "%s open failed", pathname);
-
- retry = mbox_retries;
-
- do {
- if (ioctl(fd, ISST_IF_MBOX_COMMAND, &mbox_cmds) == -1) {
- if (errno == ENOTTY) {
- perror("ISST_IF_MBOX_COMMAND\n");
- fprintf(stderr, "Check presence of kernel modules: isst_if_mbox_pci or isst_if_mbox_msr\n");
- exit(0);
- }
- debug_printf(
- "Error: mbox_cmd cpu:%d command:%x sub_command:%x parameter:%x req_data:%x errorno:%d\n",
- cpu, command, sub_command, parameter, req_data, errno);
- --retry;
- } else {
- *resp = mbox_cmds.mbox_cmd[0].resp_data;
- debug_printf(
- "mbox_cmd response: cpu:%d command:%x sub_command:%x parameter:%x req_data:%x resp:%x\n",
- cpu, command, sub_command, parameter, req_data, *resp);
- break;
- }
- } while (retry);
-
- close(fd);
-
- if (!retry) {
- debug_printf("Failed mbox command even after retries\n");
- return -1;
-
- }
- return 0;
-}
-
projects / platform / kernel / linux-rpi.git / commitdiff