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hw/cxl/cxl-mailbox-utils: Add mailbox commands to support add/release dynamic capacity response

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Per CXL spec 3.1, two mailbox commands are implemented:
Add Dynamic Capacity Response (Opcode 4802h) 8.2.9.9.9.3, and
Release Dynamic Capacity (Opcode 4803h) 8.2.9.9.9.4.

For the process of the above two commands, we use two-pass approach.
Pass 1: Check whether the input payload is valid or not; if not, skip
        Pass 2 and return mailbox process error.
Pass 2: Do the real work--add or release extents, respectively.

Tested-by: Svetly Todorov <svetly.todorov@memverge.com>
Reviewed-by: Gregory Price <gregory.price@memverge.com>
Signed-off-by: Fan Ni <fan.ni@samsung.com>
Message-Id: <20240523174651.1089554-11-nifan.cxl@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Fan Ni 2024-05-23 10:44:50 -07:00 • committed by Michael S. Tsirkin
parent 1c9221f19e
commit 16fd1b1216
3 changed files with 409 additions and 0 deletions
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11
hw/mem/cxl_type3.c
View file

@ -678,6 +678,15 @@ static bool cxl_create_dc_regions(CXLType3Dev *ct3d, Error **errp)
return true;
}
static void cxl_destroy_dc_regions(CXLType3Dev *ct3d)
{
CXLDCExtent *ent, *ent_next;
QTAILQ_FOREACH_SAFE(ent, &ct3d->dc.extents, node, ent_next) {
cxl_remove_extent_from_extent_list(&ct3d->dc.extents, ent);
}
}
static bool cxl_setup_memory(CXLType3Dev *ct3d, Error **errp)
{
DeviceState *ds = DEVICE(ct3d);
@ -874,6 +883,7 @@ err_free_special_ops:
g_free(regs->special_ops);
err_address_space_free:
if (ct3d->dc.host_dc) {
cxl_destroy_dc_regions(ct3d);
address_space_destroy(&ct3d->dc.host_dc_as);
}
if (ct3d->hostpmem) {
@ -895,6 +905,7 @@ static void ct3_exit(PCIDevice *pci_dev)
cxl_doe_cdat_release(cxl_cstate);
g_free(regs->special_ops);
if (ct3d->dc.host_dc) {
cxl_destroy_dc_regions(ct3d);
address_space_destroy(&ct3d->dc.host_dc_as);
}
if (ct3d->hostpmem) {