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hw/cxl: Introduce CXL_T3_MSIX_VECTOR enumeration

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Introduce the `CXL_T3_MSIX_VECTOR` enumeration to specify MSIX vector
assignments specific to the Type 3 (T3) CXL device.

The primary goal of this change is to encapsulate the MSIX vector uses
that are unique to the T3 device within an enumeration, improving code
readability and maintenance by avoiding magic numbers. This organizational
change allows for more explicit references to each vector’s role, thereby
reducing the potential for misconfiguration.

It also modified `mailbox_reg_init_common` to accept the `msi_n` parameter,
reflecting the new MSIX vector setup.

This pertains to the T3 device privately; other endpoints should refrain from
using it, despite its public accessibility to all of them.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20250203161908.145406-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Li Zhijian 2025-02-03 16:19:04 +00:00 • committed by Michael S. Tsirkin
parent 14998e50c3
commit 8f90a54cfa
4 changed files with 24 additions and 16 deletions
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20
hw/mem/cxl_type3.c
View file

@ -30,6 +30,14 @@
#include "hw/cxl/cxl.h"
#include "hw/pci/msix.h"
/* type3 device private */
enum CXL_T3_MSIX_VECTOR {
CXL_T3_MSIX_PCIE_DOE_TABLE_ACCESS = 0,
CXL_T3_MSIX_EVENT_START = 2,
CXL_T3_MSIX_MBOX = CXL_T3_MSIX_EVENT_START + CXL_EVENT_TYPE_MAX,
CXL_T3_MSIX_VECTOR_NR
};
#define DWORD_BYTE 4
#define CXL_CAPACITY_MULTIPLIER (256 * MiB)
@ -843,7 +851,6 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
ComponentRegisters *regs = &cxl_cstate->crb;
MemoryRegion *mr = &regs->component_registers;
uint8_t *pci_conf = pci_dev->config;
unsigned short msix_num = 10;
int i, rc;
uint16_t count;
@ -884,16 +891,17 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
&ct3d->cxl_dstate.device_registers);
/* MSI(-X) Initialization */
rc = msix_init_exclusive_bar(pci_dev, msix_num, 4, NULL);
rc = msix_init_exclusive_bar(pci_dev, CXL_T3_MSIX_VECTOR_NR, 4, NULL);
if (rc) {
goto err_address_space_free;
}
for (i = 0; i < msix_num; i++) {
for (i = 0; i < CXL_T3_MSIX_VECTOR_NR; i++) {
msix_vector_use(pci_dev, i);
}
/* DOE Initialization */
pcie_doe_init(pci_dev, &ct3d->doe_cdat, 0x190, doe_cdat_prot, true, 0);
pcie_doe_init(pci_dev, &ct3d->doe_cdat, 0x190, doe_cdat_prot, true,
CXL_T3_MSIX_PCIE_DOE_TABLE_ACCESS);
cxl_cstate->cdat.build_cdat_table = ct3_build_cdat_table;
cxl_cstate->cdat.free_cdat_table = ct3_free_cdat_table;
@ -908,7 +916,7 @@ static void ct3_realize(PCIDevice *pci_dev, Error **errp)
if (rc) {
goto err_release_cdat;
}
cxl_event_init(&ct3d->cxl_dstate, 2);
cxl_event_init(&ct3d->cxl_dstate, CXL_T3_MSIX_EVENT_START);
/* Set default value for patrol scrub attributes */
ct3d->patrol_scrub_attrs.scrub_cycle_cap =
@ -1202,7 +1210,7 @@ static void ct3d_reset(DeviceState *dev)
pcie_cap_fill_link_ep_usp(PCI_DEVICE(dev), ct3d->width, ct3d->speed);
cxl_component_register_init_common(reg_state, write_msk, CXL2_TYPE3_DEVICE);
cxl_device_register_init_t3(ct3d);
cxl_device_register_init_t3(ct3d, CXL_T3_MSIX_MBOX);
/*
* Bring up an endpoint to target with MCTP over VDM.