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Mon, 17 Mar 2025 09:43:38 -0700 (PDT) From: anisa.su887@gmail.com To: qemu-devel@nongnu.org Cc: jonathan.cameron@huawei.com, nifan.cxl@gmail.com, dave@stgolabs.net, linux-cxl@vger.kernel.org, Anisa Su Subject: [PATCH 2/9] cxl-mailbox-utils: 0x5600 - FMAPI Get DCD Info Date: Mon, 17 Mar 2025 16:31:29 +0000 Message-ID: <20250317164204.2299371-3-anisa.su887@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250317164204.2299371-1-anisa.su887@gmail.com> References: <20250317164204.2299371-1-anisa.su887@gmail.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Anisa Su FM DCD Management command 0x5600 implemented per CXL 3.2 Spec Section 7.6.7.6.1 Signed-off-by: Anisa Su --- hw/cxl/cxl-mailbox-utils.c | 67 ++++++++++++++++++++++++++++++++++++++ hw/cxl/i2c_mctp_cxl.c | 6 +++- 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 1b62d36101..e9991fd1a7 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -122,6 +122,8 @@ enum { #define MANAGEMENT_COMMAND 0x0 MHD = 0x55, #define GET_MHD_INFO 0x0 + FMAPI_DCD_MGMT = 0x56, + #define GET_DCD_INFO 0x0 }; /* CCI Message Format CXL r3.1 Figure 7-19 */ @@ -3341,6 +3343,62 @@ static CXLRetCode cmd_dcd_release_dyn_cap(const struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } +/* + * CXL r3.2 section 7.6.7.6.1: Get DCD Info (Opcode 5600h) + */ +static CXLRetCode cmd_fm_get_dcd_info(const struct cxl_cmd *cmd, + uint8_t *payload_in, + size_t len_in, + uint8_t *payload_out, + size_t *len_out, + CXLCCI *cci) +{ + struct { + uint8_t num_hosts; + uint8_t num_regions_supported; + uint8_t rsvd1[2]; + uint16_t add_select_policy_bitmask; + uint8_t rsvd2[2]; + uint16_t release_select_policy_bitmask; + uint8_t sanitize_on_release_bitmask; + uint8_t rsvd3; + uint64_t total_dynamic_capacity; + uint64_t region_blk_size_bitmasks[8]; + } QEMU_PACKED *out; + CXLType3Dev *ct3d = CXL_TYPE3(cci->d); + CXLDCRegion region; + int i; + + if (ct3d->dc.num_regions == 0) { + return CXL_MBOX_UNSUPPORTED; + } + + out = (void *)payload_out; + + /* TODO: num hosts set to 1 for now */ + out->num_hosts = 1; + out->num_regions_supported = ct3d->dc.num_regions; + /* TODO: only prescriptive supported for now */ + stw_le_p(&out->add_select_policy_bitmask, + CXL_EXTENT_SELECTION_POLICY_PRESCRIPTIVE); + stw_le_p(&out->release_select_policy_bitmask, + CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE); + /* TODO: sanitize on release bitmask cleared for now */ + out->sanitize_on_release_bitmask = 0; + + stq_le_p(&out->total_dynamic_capacity, + ct3d->dc.total_capacity / CXL_CAPACITY_MULTIPLIER); + + for (i = 0; i < ct3d->dc.num_regions; i++) { + region = ct3d->dc.regions[i]; + memcpy(&out->region_blk_size_bitmasks[i], + ®ion.supported_blk_size_bitmask, 8); + } + + *len_out = sizeof(*out); + return CXL_MBOX_SUCCESS; +} + static const struct cxl_cmd cxl_cmd_set[256][256] = { [INFOSTAT][BACKGROUND_OPERATION_ABORT] = { "BACKGROUND_OPERATION_ABORT", cmd_infostat_bg_op_abort, 0, 0 }, @@ -3462,6 +3520,11 @@ static const struct cxl_cmd cxl_cmd_set_sw[256][256] = { cmd_tunnel_management_cmd, ~0, 0 }, }; +static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][256] = { + [FMAPI_DCD_MGMT][GET_DCD_INFO] = { "GET_DCD_INFO", + cmd_fm_get_dcd_info, 0, 0}, +}; + /* * While the command is executing in the background, the device should * update the percentage complete in the Background Command Status Register @@ -3764,7 +3827,11 @@ void cxl_initialize_t3_fm_owned_ld_mctpcci(CXLCCI *cci, DeviceState *d, DeviceState *intf, size_t payload_max) { + CXLType3Dev *ct3d = CXL_TYPE3(d); cxl_copy_cci_commands(cci, cxl_cmd_set_t3_fm_owned_ld_mctp); + if (ct3d->dc.num_regions) { + cxl_copy_cci_commands(cci, cxl_cmd_set_fm_dcd); + } cci->d = d; cci->intf = intf; cxl_init_cci(cci, payload_max); diff --git a/hw/cxl/i2c_mctp_cxl.c b/hw/cxl/i2c_mctp_cxl.c index 7d2cbc3b75..df95182925 100644 --- a/hw/cxl/i2c_mctp_cxl.c +++ b/hw/cxl/i2c_mctp_cxl.c @@ -46,6 +46,9 @@ /* Implementation choice - may make this configurable */ #define MCTP_CXL_MAILBOX_BYTES 512 +/* Supported FMAPI Cmds */ +#define FMAPI_CMD_MAX_OPCODE 0x57 + typedef struct CXLMCTPMessage { /* * DSP0236 (MCTP Base) Integrity Check + Message Type @@ -200,7 +203,8 @@ static void i2c_mctp_cxl_handle_message(MCTPI2CEndpoint *mctp) if (!(msg->message_type == MCTP_MT_CXL_TYPE3 && msg->command_set < 0x51) && !(msg->message_type == MCTP_MT_CXL_FMAPI && - msg->command_set >= 0x51 && msg->command_set < 0x56)) { + msg->command_set >= 0x51 && + msg->command_set < FMAPI_CMD_MAX_OPCODE)) { buf->rc = CXL_MBOX_UNSUPPORTED; st24_le_p(buf->pl_length, len_out); s->len = s->pos;