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Thu, 26 Jun 2025 15:28:16 -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 01/10] cxl-mailbox-utils: 0x5600 - FMAPI Get DCD Info Date: Thu, 26 Jun 2025 22:23:24 +0000 Message-ID: <20250626222743.1766404-2-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::62e; envelope-from=anisa.su887@gmail.com; helo=mail-pl1-x62e.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, SPF_PASS=-0.001 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: 1750977068335116600 Content-Type: text/plain; charset="utf-8" From: Anisa Su FM DCD Management command 0x5600 implemented per CXL 3.2 Spec Section 7.6.7= .6.1. Reviewed-by: Fan Ni Signed-off-by: Anisa Su --- hw/cxl/cxl-mailbox-utils.c | 59 +++++++++++++++++++++++++++++++++++++ hw/mem/cxl_type3.c | 4 +++ include/hw/cxl/cxl_device.h | 1 + 3 files changed, 64 insertions(+) diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 3914fa73b9..9a0f8bd2fc 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -23,6 +23,7 @@ #include "qemu/uuid.h" #include "system/hostmem.h" #include "qemu/range.h" +#include "qapi/qapi-types-cxl.h" =20 #define CXL_CAPACITY_MULTIPLIER (256 * MiB) #define CXL_DC_EVENT_LOG_SIZE 8 @@ -117,6 +118,8 @@ enum { #define GET_PHYSICAL_PORT_STATE 0x1 TUNNEL =3D 0x53, #define MANAGEMENT_COMMAND 0x0 + FMAPI_DCD_MGMT =3D 0x56, + #define GET_DCD_INFO 0x0 }; =20 /* CCI Message Format CXL r3.1 Figure 7-19 */ @@ -3237,6 +3240,52 @@ static CXLRetCode cmd_dcd_release_dyn_cap(const stru= ct cxl_cmd *cmd, return CXL_MBOX_SUCCESS; } =20 +/* 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 supported_add_sel_policy_bitmask; + uint8_t rsvd2[2]; + uint16_t supported_removal_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 =3D (void *)payload_out; + CXLType3Dev *ct3d =3D CXL_TYPE3(cci->d); + CXLDCRegion *region; + int i; + + out->num_hosts =3D 1; + out->num_regions_supported =3D ct3d->dc.num_regions; + stw_le_p(&out->supported_add_sel_policy_bitmask, + BIT(CXL_EXTENT_SELECTION_POLICY_PRESCRIPTIVE)); + stw_le_p(&out->supported_removal_policy_bitmask, + BIT(CXL_EXTENT_REMOVAL_POLICY_PRESCRIPTIVE)); + out->sanitize_on_release_bitmask =3D 0; + + stq_le_p(&out->total_dynamic_capacity, + ct3d->dc.total_capacity / CXL_CAPACITY_MULTIPLIER); + + for (i =3D 0; i < ct3d->dc.num_regions; i++) { + region =3D &ct3d->dc.regions[i]; + memcpy(&out->region_blk_size_bitmasks[i], + ®ion->supported_blk_size_bitmask, + sizeof(out->region_blk_size_bitmasks[i])); + } + + *len_out =3D sizeof(*out); + 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 }, @@ -3350,6 +3399,11 @@ static const struct cxl_cmd cxl_cmd_set_sw[256][256]= =3D { cmd_tunnel_management_cmd, ~0, 0 }, }; =20 +static const struct cxl_cmd cxl_cmd_set_fm_dcd[256][256] =3D { + [FMAPI_DCD_MGMT][GET_DCD_INFO] =3D { "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 @@ -3647,7 +3701,12 @@ void cxl_initialize_t3_fm_owned_ld_mctpcci(CXLCCI *c= ci, DeviceState *d, DeviceState *intf, size_t payload_max) { + CXLType3Dev *ct3d =3D 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 =3D d; cci->intf =3D intf; cxl_init_cci(cci, payload_max); diff --git a/hw/mem/cxl_type3.c b/hw/mem/cxl_type3.c index f283178d88..f608470362 100644 --- a/hw/mem/cxl_type3.c +++ b/hw/mem/cxl_type3.c @@ -8,6 +8,7 @@ * * SPDX-License-Identifier: GPL-v2-only */ +#include =20 #include "qemu/osdep.h" #include "qemu/units.h" @@ -634,6 +635,8 @@ static bool cxl_create_dc_regions(CXLType3Dev *ct3d, Er= ror **errp) uint64_t region_len; uint64_t decode_len; uint64_t blk_size =3D 2 * MiB; + /* Only 1 block size is supported for now. */ + uint64_t supported_blk_size_bitmask =3D BIT((int) log2(blk_size)); CXLDCRegion *region; MemoryRegion *mr; uint64_t dc_size; @@ -679,6 +682,7 @@ static bool cxl_create_dc_regions(CXLType3Dev *ct3d, Er= ror **errp) .block_size =3D blk_size, /* dsmad_handle set when creating CDAT table entries */ .flags =3D 0, + .supported_blk_size_bitmask =3D supported_blk_size_bitmask, }; ct3d->dc.total_capacity +=3D region->len; region->blk_bitmap =3D bitmap_new(region->len / region->block_size= ); diff --git a/include/hw/cxl/cxl_device.h b/include/hw/cxl/cxl_device.h index c43a394ce1..1170ac58a3 100644 --- a/include/hw/cxl/cxl_device.h +++ b/include/hw/cxl/cxl_device.h @@ -537,6 +537,7 @@ typedef struct CXLDCRegion { uint32_t dsmadhandle; uint8_t flags; unsigned long *blk_bitmap; + uint64_t supported_blk_size_bitmask; } CXLDCRegion; =20 typedef struct CXLSetFeatureInfo { --=20 2.47.2