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Thu, 26 Jun 2025 15:28:28 -0700 (PDT) From: anisa.su887@gmail.com To: qemu-devel@nongnu.org Cc: Jonathan.Cameron@huawei.com, nifan.cxl@gmail.com, dave@stgolabs.net, alok.a.tiwari@oracle.com, linux-cxl@vger.kernel.org, Anisa Su , Fan Ni Subject: [QEMU PATCH v4 07/10] cxl-mailbox-utils: 0x5603 - FMAPI Get DC Region Extent Lists Date: Thu, 26 Jun 2025 22:23:30 +0000 Message-ID: <20250626222743.1766404-8-anisa.su887@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250626222743.1766404-1-anisa.su887@gmail.com> References: <20250626222743.1766404-1-anisa.su887@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::631; envelope-from=anisa.su887@gmail.com; helo=mail-pl1-x631.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1750977021704116600 Content-Type: text/plain; charset="utf-8" From: Anisa Su FM DCD Management command 0x5603 implemented per CXL r3.2 Spec Section 7.6.= 7.6.4 Very similar to previously implemented command 0x4801. Reviewed-by: Fan Ni Signed-off-by: Anisa Su --- hw/cxl/cxl-mailbox-utils.c | 76 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 69c618383a..e3d54ed124 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -122,6 +122,7 @@ enum { #define GET_DCD_INFO 0x0 #define GET_HOST_DC_REGION_CONFIG 0x1 #define SET_DC_REGION_CONFIG 0x2 + #define GET_DC_REGION_EXTENT_LIST 0x3 }; =20 /* CCI Message Format CXL r3.1 Figure 7-19 */ @@ -3466,6 +3467,79 @@ static CXLRetCode cmd_fm_set_dc_region_config(const = struct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } =20 +/* CXL r3.2 section 7.6.7.6.4 Get DC Region Extent Lists (Opcode 5603h) */ +static CXLRetCode cmd_fm_get_dc_region_extent_list(const struct cxl_cmd *c= md, + 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 rsvd[2]; + uint32_t extent_cnt; + uint32_t start_extent_id; + } QEMU_PACKED *in =3D (void *)payload_in; + struct { + uint16_t host_id; + uint8_t rsvd[2]; + uint32_t start_extent_id; + uint32_t extents_returned; + uint32_t total_extents; + uint32_t list_generation_num; + uint8_t rsvd2[4]; + CXLDCExtentRaw records[]; + } QEMU_PACKED *out =3D (void *)payload_out; + QEMU_BUILD_BUG_ON(sizeof(*in) !=3D 0xc); + CXLType3Dev *ct3d =3D CXL_TYPE3(cci->d); + CXLDCExtent *ent; + CXLDCExtentRaw *out_rec; + uint16_t record_count =3D 0, record_done =3D 0, i =3D 0; + uint16_t out_pl_len, max_size; + + if (in->host_id !=3D 0) { + return CXL_MBOX_INVALID_INPUT; + } + + if (in->start_extent_id > ct3d->dc.nr_extents_accepted) { + return CXL_MBOX_INVALID_INPUT; + } + + record_count =3D MIN(in->extent_cnt, + ct3d->dc.nr_extents_accepted - in->start_extent_id); + max_size =3D CXL_MAILBOX_MAX_PAYLOAD_SIZE - sizeof(*out); + record_count =3D MIN(record_count, max_size / sizeof(out->records[0])); + out_pl_len =3D sizeof(*out) + record_count * sizeof(out->records[0]); + + stw_le_p(&out->host_id, in->host_id); + stl_le_p(&out->start_extent_id, in->start_extent_id); + stl_le_p(&out->extents_returned, record_count); + stl_le_p(&out->total_extents, ct3d->dc.nr_extents_accepted); + stl_le_p(&out->list_generation_num, ct3d->dc.ext_list_gen_seq); + + if (record_count > 0) { + QTAILQ_FOREACH(ent, &ct3d->dc.extents, node) { + if (i++ < in->start_extent_id) { + continue; + } + out_rec =3D &out->records[record_done]; + stq_le_p(&out_rec->start_dpa, ent->start_dpa); + stq_le_p(&out_rec->len, ent->len); + memcpy(&out_rec->tag, ent->tag, 0x10); + stw_le_p(&out_rec->shared_seq, ent->shared_seq); + + record_done++; + if (record_done =3D=3D record_count) { + break; + } + } + } + + *len_out =3D out_pl_len; + return CXL_MBOX_SUCCESS; +} + static const struct cxl_cmd cxl_cmd_set[256][256] =3D { [INFOSTAT][BACKGROUND_OPERATION_ABORT] =3D { "BACKGROUND_OPERATION_ABO= RT", cmd_infostat_bg_op_abort, 0, 0 }, @@ -3591,6 +3665,8 @@ static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][2= 56] =3D { CXL_MBOX_CONFIG_CHANGE_CXL_RESET | CXL_MBOX_IMMEDIATE_CONFIG_CHANGE | CXL_MBOX_IMMEDIATE_DATA_CHANGE) }, + [FMAPI_DCD_MGMT][GET_DC_REGION_EXTENT_LIST] =3D { "GET_DC_REGION_EXTEN= T_LIST", + cmd_fm_get_dc_region_extent_list, 12, 0 }, }; =20 /* --=20 2.47.2