This implements the CXL device status registers from 8.2.8.3.1 in the CXL 2.0 specification. It is capability ID 0001h.
Signed-off-by: Ben Widawsky <[email protected]> --- hw/cxl/cxl-device-utils.c | 45 +++++++++++++++++++++++++++++++++- include/hw/cxl/cxl_device.h | 49 ++++++++++++------------------------- 2 files changed, 60 insertions(+), 34 deletions(-) diff --git a/hw/cxl/cxl-device-utils.c b/hw/cxl/cxl-device-utils.c index a391bb15c6..78144e103c 100644 --- a/hw/cxl/cxl-device-utils.c +++ b/hw/cxl/cxl-device-utils.c @@ -33,6 +33,42 @@ static uint64_t caps_reg_read(void *opaque, hwaddr offset, unsigned size) return ldn_le_p(cxl_dstate->caps_reg_state + offset, size); } +static uint64_t dev_reg_read(void *opaque, hwaddr offset, unsigned size) +{ + uint64_t retval = 0; + + switch (size) { + case 4: + if (unlikely(offset & (sizeof(uint32_t) - 1))) { + qemu_log_mask(LOG_UNIMP, "Unaligned register read\n"); + return 0; + } + break; + case 8: + if (unlikely(offset & (sizeof(uint64_t) - 1))) { + qemu_log_mask(LOG_UNIMP, "Unaligned register read\n"); + return 0; + } + break; + } + + return ldn_le_p(&retval, size); +} + +static const MemoryRegionOps dev_ops = { + .read = dev_reg_read, + .write = NULL, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 8, + }, + .impl = { + .min_access_size = 4, + .max_access_size = 8, + }, +}; + static const MemoryRegionOps caps_ops = { .read = caps_reg_read, .write = NULL, @@ -56,18 +92,25 @@ void cxl_device_register_block_init(Object *obj, CXLDeviceState *cxl_dstate) memory_region_init_io(&cxl_dstate->caps, obj, &caps_ops, cxl_dstate, "cap-array", CXL_DEVICE_REGISTERS_OFFSET - 0); + memory_region_init_io(&cxl_dstate->device, obj, &dev_ops, cxl_dstate, + "device-status", CXL_DEVICE_REGISTERS_LENGTH); memory_region_add_subregion(&cxl_dstate->device_registers, 0, &cxl_dstate->caps); + memory_region_add_subregion(&cxl_dstate->device_registers, + CXL_DEVICE_REGISTERS_OFFSET, + &cxl_dstate->device); } void cxl_device_register_init_common(CXLDeviceState *cxl_dstate) { uint32_t *cap_hdrs = cxl_dstate->caps_reg_state32; - const int cap_count = 0; + const int cap_count = 1; /* CXL Device Capabilities Array Register */ ARRAY_FIELD_DP32(cap_hdrs, CXL_DEV_CAP_ARRAY, CAP_ID, 0); ARRAY_FIELD_DP32(cap_hdrs, CXL_DEV_CAP_ARRAY, CAP_VERSION, 1); ARRAY_FIELD_DP32(cap_hdrs, CXL_DEV_CAP_ARRAY2, CAP_COUNT, cap_count); + + cxl_device_cap_init(cxl_dstate, DEVICE, 1); } diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h index 491eca6e05..2c674fdc9c 100644 --- a/include/hw/cxl/cxl_device.h +++ b/include/hw/cxl/cxl_device.h @@ -127,6 +127,22 @@ CXL_DEVICE_CAPABILITY_HEADER_REGISTER(DEVICE, CXL_DEVICE_CAP_HDR1_OFFSET) CXL_DEVICE_CAPABILITY_HEADER_REGISTER(MAILBOX, CXL_DEVICE_CAP_HDR1_OFFSET + \ CXL_DEVICE_CAP_REG_SIZE) +#define cxl_device_cap_init(dstate, reg, cap_id) \ + do { \ + uint32_t *cap_hdrs = dstate->caps_reg_state32; \ + int which = R_CXL_DEV_##reg##_CAP_HDR0; \ + cap_hdrs[which] = \ + FIELD_DP32(cap_hdrs[which], CXL_DEV_##reg##_CAP_HDR0, CAP_ID, cap_id); \ + cap_hdrs[which] = FIELD_DP32( \ + cap_hdrs[which], CXL_DEV_##reg##_CAP_HDR0, CAP_VERSION, 1); \ + cap_hdrs[which + 1] = \ + FIELD_DP32(cap_hdrs[which + 1], CXL_DEV_##reg##_CAP_HDR1, \ + CAP_OFFSET, CXL_##reg##_REGISTERS_OFFSET); \ + cap_hdrs[which + 2] = \ + FIELD_DP32(cap_hdrs[which + 2], CXL_DEV_##reg##_CAP_HDR2, \ + CAP_LENGTH, CXL_##reg##_REGISTERS_LENGTH); \ + } while (0) + REG32(CXL_DEV_MAILBOX_CAP, 0) FIELD(CXL_DEV_MAILBOX_CAP, PAYLOAD_SIZE, 0, 5) FIELD(CXL_DEV_MAILBOX_CAP, INT_CAP, 5, 1) @@ -138,43 +154,10 @@ REG32(CXL_DEV_MAILBOX_CTRL, 4) FIELD(CXL_DEV_MAILBOX_CTRL, INT_EN, 1, 2) FIELD(CXL_DEV_MAILBOX_CTRL, BG_INT_EN, 2, 1) -enum { - CXL_CMD_EVENTS = 0x1, - CXL_CMD_IDENTIFY = 0x40, -}; - REG32(CXL_DEV_MAILBOX_CMD, 8) FIELD(CXL_DEV_MAILBOX_CMD, OP, 0, 16) FIELD(CXL_DEV_MAILBOX_CMD, LENGTH, 16, 20) -/* 8.2.8.4.5.1 Command Return Codes */ -enum { - RET_SUCCESS = 0x0, - RET_BG_STARTED = 0x1, /* Background Command Started */ - RET_EINVAL = 0x2, /* Invalid Input */ - RET_ENOTSUP = 0x3, /* Unsupported */ - RET_ENODEV = 0x4, /* Internal Error */ - RET_ERESTART = 0x5, /* Retry Required */ - RET_EBUSY = 0x6, /* Busy */ - RET_MEDIA_DISABLED = 0x7, /* Media Disabled */ - RET_FW_EBUSY = 0x8, /* FW Transfer in Progress */ - RET_FW_OOO = 0x9, /* FW Transfer Out of Order */ - RET_FW_AUTH = 0xa, /* FW Authentication Failed */ - RET_FW_EBADSLT = 0xb, /* Invalid Slot */ - RET_FW_ROLLBACK = 0xc, /* Activation Failed, FW Rolled Back */ - RET_FW_REBOOT = 0xd, /* Activation Failed, Cold Reset Required */ - RET_ENOENT = 0xe, /* Invalid Handle */ - RET_EFAULT = 0xf, /* Invalid Physical Address */ - RET_POISON_E2BIG = 0x10, /* Inject Poison Limit Reached */ - RET_EIO = 0x11, /* Permanent Media Failure */ - RET_ECANCELED = 0x12, /* Aborted */ - RET_EACCESS = 0x13, /* Invalid Security State */ - RET_EPERM = 0x14, /* Incorrect Passphrase */ - RET_EPROTONOSUPPORT = 0x15, /* Unsupported Mailbox */ - RET_EMSGSIZE = 0x16, /* Invalid Payload Length */ - RET_MAX = 0x17 -}; - /* XXX: actually a 64b register */ REG32(CXL_DEV_MAILBOX_STS, 0x10) FIELD(CXL_DEV_MAILBOX_STS, BG_OP, 0, 1) -- 2.29.2
