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Mon, 17 Mar 2025 09:44:09 -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 9/9] cxl-mailbox-utils: 0x5605 - FMAPI Initiate DC Release Date: Mon, 17 Mar 2025 16:31:36 +0000 Message-ID: <20250317164204.2299371-10-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 Managment command 0x5605 implemented per CXL r3.2 Spec Section 7.6.7.6.6 Signed-off-by: Anisa Su --- hw/cxl/cxl-mailbox-utils.c | 94 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 5bcbd434b7..37810d892f 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -128,6 +128,7 @@ enum { #define SET_DC_REGION_CONFIG 0x2 #define GET_DC_REGION_EXTENT_LIST 0x3 #define INITIATE_DC_ADD 0x4 + #define INITIATE_DC_RELEASE 0x5 }; @@ -3722,6 +3723,10 @@ static CXLRetCode cxl_mbox_dc_prescriptive_sanity_check(CXLType3Dev *dcd, ext.start_dpa, ext.len)) { return CXL_MBOX_INVALID_EXTENT_LIST; } + } else if (type == DC_EVENT_RELEASE_CAPACITY) { + if (!ct3_test_region_block_backed(dcd, ext.start_dpa, ext.len)) { + return CXL_MBOX_INVALID_PA; + } } } @@ -3835,6 +3840,88 @@ static CXLRetCode cmd_fm_initiate_dc_add(const struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } +/* + * CXL r3.2 Section 7.6.7.6.6 Initiate Dynamic Capacity Release (Opcode 5605h) + */ +static CXLRetCode cmd_fm_initiate_dc_release(const struct cxl_cmd *cmd, + uint8_t *payload_in, + size_t len_in, + uint8_t *payload_out, + size_t *len_out, + CXLCCI *cci) +{ + struct { + uint16_t host_id; + uint8_t flags; + uint8_t reg_num; + uint64_t length; + uint8_t tag[0x10]; + uint32_t ext_count; + CXLDCExtentRaw extents[]; + } QEMU_PACKED *in = (void *)payload_in; + CXLType3Dev *ct3d = CXL_TYPE3(cci->d); + g_autofree CXLDCExtentRaw *event_rec_exts = NULL; + CXLEventDynamicCapacity event_rec = {}; + CXLDCExtentRaw ext; + int i, rc = 0; + + switch (in->flags & 0x7) { + case CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE: + rc = cxl_mbox_dc_prescriptive_sanity_check(ct3d, + in->host_id, + in->ext_count, + in->extents, + DC_EVENT_RELEASE_CAPACITY); + if (rc) { + return rc; + } + + /* Create extents for Event Record */ + event_rec_exts = g_new0(CXLDCExtentRaw, in->ext_count); + for (i = 0; i < in->ext_count; i++) { + ext = in->extents[i]; + event_rec_exts[i].start_dpa = ext.start_dpa; + event_rec_exts[i].len = ext.len; + memset(event_rec_exts[i].tag, 0, 0x10); + event_rec_exts[i].shared_seq = 0; + } + + /* Create event record and insert to event log */ + cxl_mbox_dc_event_create_record_hdr(ct3d, &event_rec.hdr); + event_rec.type = DC_EVENT_RELEASE_CAPACITY; + /* FIXME: for now, validity flag is cleared */ + event_rec.validity_flags = 0; + /* FIXME: Currently only support 1 host */ + event_rec.host_id = 0; + /* updated_region_id only valid for DC_EVENT_REGION_CONFIG_UPDATED */ + event_rec.updated_region_id = 0; + for (i = 0; i < in->ext_count; i++) { + memcpy(&event_rec.dynamic_capacity_extent, + &event_rec_exts[i], + sizeof(CXLDCExtentRaw)); + + event_rec.flags = 0; + if (i < in->ext_count - 1) { + /* Set "More" flag */ + event_rec.flags |= BIT(0); + } + + if (cxl_event_insert(&ct3d->cxl_dstate, + CXL_EVENT_TYPE_DYNAMIC_CAP, + (CXLEventRecordRaw *)&event_rec)) { + cxl_event_irq_assert(ct3d); + } + } + return CXL_MBOX_SUCCESS; + default: + qemu_log_mask(LOG_UNIMP, + "CXL extent selection policy not supported.\n"); + return CXL_MBOX_INVALID_INPUT; + } + + 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 }, @@ -3977,6 +4064,13 @@ static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][256] = { CXL_MBOX_CONFIG_CHANGE_CXL_RESET | CXL_MBOX_IMMEDIATE_CONFIG_CHANGE | CXL_MBOX_IMMEDIATE_DATA_CHANGE)}, + [FMAPI_DCD_MGMT][INITIATE_DC_RELEASE] = { "INIT_DC_RELEASE", + cmd_fm_initiate_dc_release, ~0, + (CXL_MBOX_CONFIG_CHANGE_COLD_RESET | + CXL_MBOX_CONFIG_CHANGE_CONV_RESET | + CXL_MBOX_CONFIG_CHANGE_CXL_RESET | + CXL_MBOX_IMMEDIATE_CONFIG_CHANGE | + CXL_MBOX_IMMEDIATE_DATA_CHANGE)}, }; /*