| Message ID | 20190312082103.130561-1-aik@ozlabs.ru (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [qemu,v7] spapr: Support NVIDIA V100 GPU with NVLink2 | expand |
On Tue, Mar 12, 2019 at 07:21:03PM +1100, Alexey Kardashevskiy wrote: > NVIDIA V100 GPUs have on-board RAM which is mapped into the host memory > space and accessible as normal RAM via an NVLink bus. The VFIO-PCI driver > implements special regions for such GPUs and emulates an NVLink bridge. > NVLink2-enabled POWER9 CPUs also provide address translation services > which includes an ATS shootdown (ATSD) register exported via the NVLink > bridge device. > > This adds a quirk to VFIO to map the GPU memory and create an MR; > the new MR is stored in a PCI device as a QOM link. The sPAPR PCI uses > this to get the MR and map it to the system address space. > Another quirk does the same for ATSD. > > This adds additional steps to sPAPR PHB setup: > > 1. Search for specific GPUs and NPUs, collect findings in > sPAPRPHBState::nvgpus, manage system address space mappings; > > 2. Add device-specific properties such as "ibm,npu", "ibm,gpu", > "memory-block", "link-speed" to advertise the NVLink2 function to > the guest; > > 3. Add "mmio-atsd" to vPHB to advertise the ATSD capability; > > 4. Add new memory blocks (with extra "linux,memory-usable" to prevent > the guest OS from accessing the new memory until it is onlined) and > npuphb# nodes representing an NPU unit for every vPHB as the GPU driver > uses it for link discovery. > > This allocates space for GPU RAM and ATSD like we do for MMIOs by > adding 2 new parameters to the phb_placement() hook. Older machine types > set these to zero. > > This puts new memory nodes in a separate NUMA node to as the GPU RAM > needs to be configured equally distant from any other node in the system. > Unlike the host setup which assigns numa ids from 255 downwards, this > adds new NUMA nodes after the user configures nodes or from 1 if none > were configured. > > This adds requirement similar to EEH - one IOMMU group per vPHB. > The reason for this is that ATSD registers belong to a physical NPU > so they cannot invalidate translations on GPUs attached to another NPU. > It is guaranteed by the host platform as it does not mix NVLink bridges > or GPUs from different NPU in the same IOMMU group. If more than one > IOMMU group is detected on a vPHB, this disables ATSD support for that > vPHB and prints a warning. > > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> > [aw: for vfio portions] > Acked-by: Alex Williamson <alex.williamson@redhat.com> I've applied this to ppc-for-4.1, now. A couple of minor points noted below which could be fixed in a followup. > --- > > This is based on David's ppc-for-4.0 and acked "vfio_info_cap public" from > https://patchwork.ozlabs.org/patch/1052645/ > > Changes: > v7: > * fixed compile on 32bit host (f29-i386) > > v6: > * changed error handling in spapr-nvlink code > * fixed mmap error checking from NULL to MAP_FAILED > * changed NUMA node ids and changed the commit log about it > > v5: > * converted MRs to VFIOQuirk - this fixed leaks > > v4: > * fixed ATSD placement > * fixed spapr_phb_unrealize() to do nvgpu cleanup > * replaced warn_report() with Error* > > v3: > * moved GPU RAM above PCI MMIO limit > * renamed QOM property to nvlink2-tgt > * moved nvlink2 code to its own file > > --- > > The example command line for redbud system: > > pbuild/qemu-aiku1804le-ppc64/ppc64-softmmu/qemu-system-ppc64 \ > -nodefaults \ > -chardev stdio,id=STDIO0,signal=off,mux=on \ > -device spapr-vty,id=svty0,reg=0x71000110,chardev=STDIO0 \ > -mon id=MON0,chardev=STDIO0,mode=readline -nographic -vga none \ > -enable-kvm -m 384G \ > -chardev socket,id=SOCKET0,server,nowait,host=localhost,port=40000 \ > -mon chardev=SOCKET0,mode=control \ > -smp 80,sockets=1,threads=4 \ > -netdev "tap,id=TAP0,helper=/home/aik/qemu-bridge-helper --br=br0" \ > -device "virtio-net-pci,id=vnet0,mac=52:54:00:12:34:56,netdev=TAP0" \ > img/vdisk0.img \ > -device "vfio-pci,id=vfio0004_04_00_0,host=0004:04:00.0" \ > -device "vfio-pci,id=vfio0006_00_00_0,host=0006:00:00.0" \ > -device "vfio-pci,id=vfio0006_00_00_1,host=0006:00:00.1" \ > -device "vfio-pci,id=vfio0006_00_00_2,host=0006:00:00.2" \ > -device "vfio-pci,id=vfio0004_05_00_0,host=0004:05:00.0" \ > -device "vfio-pci,id=vfio0006_00_01_0,host=0006:00:01.0" \ > -device "vfio-pci,id=vfio0006_00_01_1,host=0006:00:01.1" \ > -device "vfio-pci,id=vfio0006_00_01_2,host=0006:00:01.2" \ > -device spapr-pci-host-bridge,id=phb1,index=1 \ > -device "vfio-pci,id=vfio0035_03_00_0,host=0035:03:00.0" \ > -device "vfio-pci,id=vfio0007_00_00_0,host=0007:00:00.0" \ > -device "vfio-pci,id=vfio0007_00_00_1,host=0007:00:00.1" \ > -device "vfio-pci,id=vfio0007_00_00_2,host=0007:00:00.2" \ > -device "vfio-pci,id=vfio0035_04_00_0,host=0035:04:00.0" \ > -device "vfio-pci,id=vfio0007_00_01_0,host=0007:00:01.0" \ > -device "vfio-pci,id=vfio0007_00_01_1,host=0007:00:01.1" \ > -device "vfio-pci,id=vfio0007_00_01_2,host=0007:00:01.2" -snapshot \ > -machine pseries \ > -L /home/aik/t/qemu-ppc64-bios/ -d guest_errors > > Note that QEMU attaches PCI devices to the last added vPHB so first > 8 devices - 4:04:00.0 till 6:00:01.2 - go to the default vPHB, and > 35:03:00.0..7:00:01.2 to the vPHB with id=phb1. > --- > hw/ppc/Makefile.objs | 2 +- > hw/vfio/pci.h | 2 + > include/hw/pci-host/spapr.h | 45 ++++ > include/hw/ppc/spapr.h | 5 +- > hw/ppc/spapr.c | 48 +++- > hw/ppc/spapr_pci.c | 19 ++ > hw/ppc/spapr_pci_nvlink2.c | 450 ++++++++++++++++++++++++++++++++++++ > hw/vfio/pci-quirks.c | 131 +++++++++++ > hw/vfio/pci.c | 14 ++ > hw/vfio/trace-events | 4 + > 10 files changed, 711 insertions(+), 9 deletions(-) > create mode 100644 hw/ppc/spapr_pci_nvlink2.c > > diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs > index 1111b218a048..636e717f207c 100644 > --- a/hw/ppc/Makefile.objs > +++ b/hw/ppc/Makefile.objs > @@ -9,7 +9,7 @@ obj-$(CONFIG_SPAPR_RNG) += spapr_rng.o > # IBM PowerNV > obj-$(CONFIG_POWERNV) += pnv.o pnv_xscom.o pnv_core.o pnv_lpc.o pnv_psi.o pnv_occ.o pnv_bmc.o > ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy) > -obj-y += spapr_pci_vfio.o > +obj-y += spapr_pci_vfio.o spapr_pci_nvlink2.o > endif > obj-$(CONFIG_PSERIES) += spapr_rtas_ddw.o > # PowerPC 4xx boards > diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h > index b1ae4c07549a..706c30443617 100644 > --- a/hw/vfio/pci.h > +++ b/hw/vfio/pci.h > @@ -194,6 +194,8 @@ int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); > int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, > struct vfio_region_info *info, > Error **errp); > +int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp); > +int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp); > > void vfio_display_reset(VFIOPCIDevice *vdev); > int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); > diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h > index b4aad26798c0..53519c835e9f 100644 > --- a/include/hw/pci-host/spapr.h > +++ b/include/hw/pci-host/spapr.h > @@ -87,6 +87,9 @@ struct SpaprPhbState { > uint32_t mig_liobn; > hwaddr mig_mem_win_addr, mig_mem_win_size; > hwaddr mig_io_win_addr, mig_io_win_size; > + hwaddr nv2_gpa_win_addr; > + hwaddr nv2_atsd_win_addr; > + struct spapr_phb_pci_nvgpu_config *nvgpus; > }; > > #define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL > @@ -105,6 +108,22 @@ struct SpaprPhbState { > > #define SPAPR_PCI_MSI_WINDOW 0x40000000000ULL > > +#define SPAPR_PCI_NV2RAM64_WIN_BASE SPAPR_PCI_LIMIT > +#define SPAPR_PCI_NV2RAM64_WIN_SIZE (2 * TiB) /* For up to 6 GPUs 256GB each */ > + > +/* Max number of these GPUsper a physical box */ > +#define NVGPU_MAX_NUM 6 > +/* Max number of NVLinks per GPU in any physical box */ > +#define NVGPU_MAX_LINKS 3 > + > +/* > + * GPU RAM starts at 64TiB so huge DMA window to cover it all ends at 128TiB > + * which is enough. We do not need DMA for ATSD so we put them at 128TiB. > + */ > +#define SPAPR_PCI_NV2ATSD_WIN_BASE (128 * TiB) > +#define SPAPR_PCI_NV2ATSD_WIN_SIZE (NVGPU_MAX_NUM * NVGPU_MAX_LINKS * \ > + 64 * KiB) > + > static inline qemu_irq spapr_phb_lsi_qirq(struct SpaprPhbState *phb, int pin) > { > SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); > @@ -135,6 +154,13 @@ int spapr_phb_vfio_eeh_get_state(SpaprPhbState *sphb, int *state); > int spapr_phb_vfio_eeh_reset(SpaprPhbState *sphb, int option); > int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb); > void spapr_phb_vfio_reset(DeviceState *qdev); > +void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp); > +void spapr_phb_nvgpu_free(SpaprPhbState *sphb); > +void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, int bus_off, > + Error **errp); > +void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt); > +void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset, > + SpaprPhbState *sphb); > #else > static inline bool spapr_phb_eeh_available(SpaprPhbState *sphb) > { > @@ -161,6 +187,25 @@ static inline int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb) > static inline void spapr_phb_vfio_reset(DeviceState *qdev) > { > } > +static inline void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp) > +{ > +} > +static inline void spapr_phb_nvgpu_free(SpaprPhbState *sphb) > +{ > +} > +static inline void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, > + int bus_off, Error **errp) > +{ > +} > +static inline void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, > + void *fdt) > +{ > +} > +static inline void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, > + int offset, > + SpaprPhbState *sphb) > +{ > +} > #endif > > void spapr_phb_dma_reset(SpaprPhbState *sphb); > diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h > index 2b4c05a2ec33..74ce638bc10a 100644 > --- a/include/hw/ppc/spapr.h > +++ b/include/hw/ppc/spapr.h > @@ -122,7 +122,8 @@ struct SpaprMachineClass { > void (*phb_placement)(SpaprMachineState *spapr, uint32_t index, > uint64_t *buid, hwaddr *pio, > hwaddr *mmio32, hwaddr *mmio64, > - unsigned n_dma, uint32_t *liobns, Error **errp); > + unsigned n_dma, uint32_t *liobns, hwaddr *nv2gpa, > + hwaddr *nv2atsd, Error **errp); > SpaprResizeHpt resize_hpt_default; > SpaprCapabilities default_caps; > SpaprIrq *irq; > @@ -198,6 +199,8 @@ struct SpaprMachineState { > > bool cmd_line_caps[SPAPR_CAP_NUM]; > SpaprCapabilities def, eff, mig; > + > + unsigned gpu_numa_id; > }; > > #define H_SUCCESS 0 > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index 20cade50d5d0..7cb7e0c126e7 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -1034,12 +1034,13 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) > 0, cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE), > cpu_to_be32(max_cpus / smp_threads), > }; > + uint32_t maxdomain = cpu_to_be32(spapr->gpu_numa_id > 1 ? 1 : 0); > uint32_t maxdomains[] = { > cpu_to_be32(4), > - cpu_to_be32(0), > - cpu_to_be32(0), > - cpu_to_be32(0), > - cpu_to_be32(nb_numa_nodes ? nb_numa_nodes : 1), > + maxdomain, > + maxdomain, > + maxdomain, > + cpu_to_be32(spapr->gpu_numa_id), > }; > > _FDT(rtas = fdt_add_subnode(fdt, 0, "rtas")); > @@ -1713,6 +1714,16 @@ static void spapr_machine_reset(void) > spapr_irq_msi_reset(spapr); > } > > + /* > + * NVLink2-connected GPU RAM needs to be placed on a separate NUMA node. > + * We assign a new numa ID per GPU in spapr_pci_collect_nvgpu() which is > + * called from vPHB reset handler so we initialize the counter here. > + * If no NUMA is configured from the QEMU side, we start from 1 as GPU RAM > + * must be equally distant from any other node. > + * The final value of spapr->gpu_numa_id is going to be written to > + * max-associativity-domains in spapr_build_fdt(). > + */ > + spapr->gpu_numa_id = MAX(1, nb_numa_nodes); > qemu_devices_reset(); > > /* > @@ -3935,7 +3946,9 @@ static void spapr_phb_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, > smc->phb_placement(spapr, sphb->index, > &sphb->buid, &sphb->io_win_addr, > &sphb->mem_win_addr, &sphb->mem64_win_addr, > - windows_supported, sphb->dma_liobn, errp); > + windows_supported, sphb->dma_liobn, > + &sphb->nv2_gpa_win_addr, &sphb->nv2_atsd_win_addr, > + errp); > } > > static void spapr_phb_plug(HotplugHandler *hotplug_dev, DeviceState *dev, > @@ -4136,7 +4149,8 @@ static const CPUArchIdList *spapr_possible_cpu_arch_ids(MachineState *machine) > static void spapr_phb_placement(SpaprMachineState *spapr, uint32_t index, > uint64_t *buid, hwaddr *pio, > hwaddr *mmio32, hwaddr *mmio64, > - unsigned n_dma, uint32_t *liobns, Error **errp) > + unsigned n_dma, uint32_t *liobns, > + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) > { > /* > * New-style PHB window placement. > @@ -4181,6 +4195,9 @@ static void spapr_phb_placement(SpaprMachineState *spapr, uint32_t index, > *pio = SPAPR_PCI_BASE + index * SPAPR_PCI_IO_WIN_SIZE; > *mmio32 = SPAPR_PCI_BASE + (index + 1) * SPAPR_PCI_MEM32_WIN_SIZE; > *mmio64 = SPAPR_PCI_BASE + (index + 1) * SPAPR_PCI_MEM64_WIN_SIZE; > + > + *nv2gpa = SPAPR_PCI_NV2RAM64_WIN_BASE + index * SPAPR_PCI_NV2RAM64_WIN_SIZE; > + *nv2atsd = SPAPR_PCI_NV2ATSD_WIN_BASE + index * SPAPR_PCI_NV2ATSD_WIN_SIZE; > } > > static ICSState *spapr_ics_get(XICSFabric *dev, int irq) > @@ -4385,6 +4402,18 @@ DEFINE_SPAPR_MACHINE(4_0, "4.0", true); > /* > * pseries-3.1 > */ > +static void phb_placement_3_1(SpaprMachineState *spapr, uint32_t index, > + uint64_t *buid, hwaddr *pio, > + hwaddr *mmio32, hwaddr *mmio64, > + unsigned n_dma, uint32_t *liobns, > + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) > +{ > + spapr_phb_placement(spapr, index, buid, pio, mmio32, mmio64, n_dma, liobns, > + nv2gpa, nv2atsd, errp); > + *nv2gpa = 0; > + *nv2atsd = 0; > +} > + > static void spapr_machine_3_1_class_options(MachineClass *mc) > { > SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc); > @@ -4404,6 +4433,7 @@ static void spapr_machine_3_1_class_options(MachineClass *mc) > smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; > smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; > smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; > + smc->phb_placement = phb_placement_3_1; > } > > DEFINE_SPAPR_MACHINE(3_1, "3.1", false); > @@ -4535,7 +4565,8 @@ DEFINE_SPAPR_MACHINE(2_8, "2.8", false); > static void phb_placement_2_7(SpaprMachineState *spapr, uint32_t index, > uint64_t *buid, hwaddr *pio, > hwaddr *mmio32, hwaddr *mmio64, > - unsigned n_dma, uint32_t *liobns, Error **errp) > + unsigned n_dma, uint32_t *liobns, > + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) > { > /* Legacy PHB placement for pseries-2.7 and earlier machine types */ > const uint64_t base_buid = 0x800000020000000ULL; > @@ -4579,6 +4610,9 @@ static void phb_placement_2_7(SpaprMachineState *spapr, uint32_t index, > * fallback behaviour of automatically splitting a large "32-bit" > * window into contiguous 32-bit and 64-bit windows > */ > + > + *nv2gpa = 0; > + *nv2atsd = 0; > } > > static void spapr_machine_2_7_class_options(MachineClass *mc) > diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c > index 20915d2b3c19..67a277fae481 100644 > --- a/hw/ppc/spapr_pci.c > +++ b/hw/ppc/spapr_pci.c > @@ -1355,6 +1355,8 @@ static void spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset, > if (sphb->pcie_ecs && pci_is_express(dev)) { > _FDT(fdt_setprop_cell(fdt, offset, "ibm,pci-config-space-type", 0x1)); > } > + > + spapr_phb_nvgpu_populate_pcidev_dt(dev, fdt, offset, sphb); > } > > /* create OF node for pci device and required OF DT properties */ > @@ -1589,6 +1591,8 @@ static void spapr_phb_unrealize(DeviceState *dev, Error **errp) > int i; > const unsigned windows_supported = spapr_phb_windows_supported(sphb); > > + spapr_phb_nvgpu_free(sphb); > + > if (sphb->msi) { > g_hash_table_unref(sphb->msi); > sphb->msi = NULL; > @@ -1877,8 +1881,14 @@ void spapr_phb_dma_reset(SpaprPhbState *sphb) > static void spapr_phb_reset(DeviceState *qdev) > { > SpaprPhbState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev); > + Error *errp = NULL; > > spapr_phb_dma_reset(sphb); > + spapr_phb_nvgpu_free(sphb); > + spapr_phb_nvgpu_setup(sphb, &errp); > + if (errp) { > + error_report_err(errp); > + } > > /* Reset the IOMMU state */ > object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL); > @@ -1911,6 +1921,8 @@ static Property spapr_phb_properties[] = { > pre_2_8_migration, false), > DEFINE_PROP_BOOL("pcie-extended-configuration-space", SpaprPhbState, > pcie_ecs, true), > + DEFINE_PROP_UINT64("gpa", SpaprPhbState, nv2_gpa_win_addr, 0), > + DEFINE_PROP_UINT64("atsd", SpaprPhbState, nv2_atsd_win_addr, 0), > DEFINE_PROP_END_OF_LIST(), > }; > > @@ -2191,6 +2203,7 @@ int spapr_populate_pci_dt(SpaprPhbState *phb, uint32_t intc_phandle, void *fdt, > PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus; > SpaprFdt s_fdt; > SpaprDrc *drc; > + Error *errp = NULL; > > /* Start populating the FDT */ > nodename = g_strdup_printf("pci@%" PRIx64, phb->buid); > @@ -2283,6 +2296,12 @@ int spapr_populate_pci_dt(SpaprPhbState *phb, uint32_t intc_phandle, void *fdt, > return ret; > } > > + spapr_phb_nvgpu_populate_dt(phb, fdt, bus_off, &errp); > + if (errp) { > + error_report_err(errp); > + } > + spapr_phb_nvgpu_ram_populate_dt(phb, fdt); > + > return 0; > } > > diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c > new file mode 100644 > index 000000000000..3aa66aff6dbd > --- /dev/null > +++ b/hw/ppc/spapr_pci_nvlink2.c > @@ -0,0 +1,450 @@ > +/* > + * QEMU sPAPR PCI for NVLink2 pass through > + * > + * Copyright (c) 2019 Alexey Kardashevskiy, IBM Corporation. > + * > + * Permission is hereby granted, free of charge, to any person obtaining a copy > + * of this software and associated documentation files (the "Software"), to deal > + * in the Software without restriction, including without limitation the rights > + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell > + * copies of the Software, and to permit persons to whom the Software is > + * furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice shall be included in > + * all copies or substantial portions of the Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, > + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN > + * THE SOFTWARE. > + */ > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "qemu-common.h" > +#include "hw/pci/pci.h" > +#include "hw/pci-host/spapr.h" > +#include "qemu/error-report.h" > +#include "hw/ppc/fdt.h" > +#include "hw/pci/pci_bridge.h" > + > +#define PHANDLE_PCIDEV(phb, pdev) (0x12000000 | \ > + (((phb)->index) << 16) | ((pdev)->devfn)) > +#define PHANDLE_GPURAM(phb, n) (0x110000FF | ((n) << 8) | \ > + (((phb)->index) << 16)) > +#define PHANDLE_NVLINK(phb, gn, nn) (0x00130000 | (((phb)->index) << 8) | \ > + ((gn) << 4) | (nn)) > + > +#define SPAPR_GPU_NUMA_ID (cpu_to_be32(1)) > + > +struct spapr_phb_pci_nvgpu_config { > + uint64_t nv2_ram_current; > + uint64_t nv2_atsd_current; > + int num; /* number of non empty (i.e. tgt!=0) entries in slots[] */ > + struct spapr_phb_pci_nvgpu_slot { > + uint64_t tgt; > + uint64_t gpa; > + unsigned numa_id; > + PCIDevice *gpdev; > + int linknum; > + struct { > + uint64_t atsd_gpa; > + PCIDevice *npdev; > + uint32_t link_speed; > + } links[NVGPU_MAX_LINKS]; > + } slots[NVGPU_MAX_NUM]; > + Error *errp; > +}; > + > +static struct spapr_phb_pci_nvgpu_slot * > +spapr_nvgpu_get_slot(struct spapr_phb_pci_nvgpu_config *nvgpus, uint64_t tgt) > +{ > + int i; > + > + /* Search for partially collected "slot" */ > + for (i = 0; i < nvgpus->num; ++i) { > + if (nvgpus->slots[i].tgt == tgt) { > + return &nvgpus->slots[i]; > + } > + } > + > + if (nvgpus->num == ARRAY_SIZE(nvgpus->slots)) { > + return NULL; > + } > + > + i = nvgpus->num; > + nvgpus->slots[i].tgt = tgt; > + ++nvgpus->num; > + > + return &nvgpus->slots[i]; > +} > + > +static void spapr_pci_collect_nvgpu(struct spapr_phb_pci_nvgpu_config *nvgpus, > + PCIDevice *pdev, uint64_t tgt, > + MemoryRegion *mr, Error **errp) > +{ > + MachineState *machine = MACHINE(qdev_get_machine()); > + SpaprMachineState *spapr = SPAPR_MACHINE(machine); > + struct spapr_phb_pci_nvgpu_slot *nvslot = spapr_nvgpu_get_slot(nvgpus, tgt); > + > + if (!nvslot) { > + error_setg(errp, "Found too many NVLink bridges per GPU"); I think this error message isn't strictly correct (it's too many GPUs per vPHB here, rather than too many bridges per CPU). That can be fixed later, though. > + return; > + } > + g_assert(!nvslot->gpdev); > + nvslot->gpdev = pdev; > + > + nvslot->gpa = nvgpus->nv2_ram_current; > + nvgpus->nv2_ram_current += memory_region_size(mr); > + nvslot->numa_id = spapr->gpu_numa_id; > + ++spapr->gpu_numa_id; > +} > + > +static void spapr_pci_collect_nvnpu(struct spapr_phb_pci_nvgpu_config *nvgpus, > + PCIDevice *pdev, uint64_t tgt, > + MemoryRegion *mr, Error **errp) > +{ > + struct spapr_phb_pci_nvgpu_slot *nvslot = spapr_nvgpu_get_slot(nvgpus, tgt); > + int j; > + > + if (!nvslot) { > + error_setg(errp, "Found too many NVLink bridges per GPU"); Same here. > + return; > + } > + > + j = nvslot->linknum; > + if (j == ARRAY_SIZE(nvslot->links)) { > + error_setg(errp, "Found too many NVLink2 bridges"); In fact the message above would see more appropriate here. > + return; > + } > + ++nvslot->linknum; > + > + g_assert(!nvslot->links[j].npdev); > + nvslot->links[j].npdev = pdev; > + nvslot->links[j].atsd_gpa = nvgpus->nv2_atsd_current; > + nvgpus->nv2_atsd_current += memory_region_size(mr); > + nvslot->links[j].link_speed = > + object_property_get_uint(OBJECT(pdev), "nvlink2-link-speed", NULL); > +} > + > +static void spapr_phb_pci_collect_nvgpu(PCIBus *bus, PCIDevice *pdev, > + void *opaque) > +{ > + PCIBus *sec_bus; > + Object *po = OBJECT(pdev); > + uint64_t tgt = object_property_get_uint(po, "nvlink2-tgt", NULL); > + > + if (tgt) { > + Error *local_err = NULL; > + struct spapr_phb_pci_nvgpu_config *nvgpus = opaque; > + Object *mr_gpu = object_property_get_link(po, "nvlink2-mr[0]", NULL); > + Object *mr_npu = object_property_get_link(po, "nvlink2-atsd-mr[0]", > + NULL); > + > + g_assert(mr_gpu || mr_npu); > + if (mr_gpu) { > + spapr_pci_collect_nvgpu(nvgpus, pdev, tgt, MEMORY_REGION(mr_gpu), > + &local_err); > + } else { > + spapr_pci_collect_nvnpu(nvgpus, pdev, tgt, MEMORY_REGION(mr_npu), > + &local_err); > + } > + error_propagate(&nvgpus->errp, local_err); > + } > + if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != > + PCI_HEADER_TYPE_BRIDGE)) { > + return; > + } > + > + sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); > + if (!sec_bus) { > + return; > + } > + > + pci_for_each_device(sec_bus, pci_bus_num(sec_bus), > + spapr_phb_pci_collect_nvgpu, opaque); > +} > + > +void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp) > +{ > + int i, j, valid_gpu_num; > + PCIBus *bus; > + > + /* Search for GPUs and NPUs */ > + if (!sphb->nv2_gpa_win_addr || !sphb->nv2_atsd_win_addr) { > + return; > + } > + > + sphb->nvgpus = g_new0(struct spapr_phb_pci_nvgpu_config, 1); > + sphb->nvgpus->nv2_ram_current = sphb->nv2_gpa_win_addr; > + sphb->nvgpus->nv2_atsd_current = sphb->nv2_atsd_win_addr; > + > + bus = PCI_HOST_BRIDGE(sphb)->bus; > + pci_for_each_device(bus, pci_bus_num(bus), > + spapr_phb_pci_collect_nvgpu, sphb->nvgpus); > + > + if (sphb->nvgpus->errp) { > + error_propagate(errp, sphb->nvgpus->errp); > + sphb->nvgpus->errp = NULL; > + goto cleanup_exit; > + } > + > + /* Add found GPU RAM and ATSD MRs if found */ > + for (i = 0, valid_gpu_num = 0; i < sphb->nvgpus->num; ++i) { > + Object *nvmrobj; > + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; > + > + if (!nvslot->gpdev) { > + continue; > + } > + nvmrobj = object_property_get_link(OBJECT(nvslot->gpdev), > + "nvlink2-mr[0]", NULL); > + /* ATSD is pointless without GPU RAM MR so skip those */ > + if (!nvmrobj) { > + continue; > + } > + > + ++valid_gpu_num; > + memory_region_add_subregion(get_system_memory(), nvslot->gpa, > + MEMORY_REGION(nvmrobj)); > + > + for (j = 0; j < nvslot->linknum; ++j) { > + Object *atsdmrobj; > + > + atsdmrobj = object_property_get_link(OBJECT(nvslot->links[j].npdev), > + "nvlink2-atsd-mr[0]", NULL); > + if (!atsdmrobj) { > + continue; > + } > + memory_region_add_subregion(get_system_memory(), > + nvslot->links[j].atsd_gpa, > + MEMORY_REGION(atsdmrobj)); > + } > + } > + > + if (valid_gpu_num) { > + return; > + } > + /* We did not find any interesting GPU */ > +cleanup_exit: > + g_free(sphb->nvgpus); > + sphb->nvgpus = NULL; > +} > + > +void spapr_phb_nvgpu_free(SpaprPhbState *sphb) > +{ > + int i, j; > + > + if (!sphb->nvgpus) { > + return; > + } > + > + for (i = 0; i < sphb->nvgpus->num; ++i) { > + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; > + Object *nv_mrobj = object_property_get_link(OBJECT(nvslot->gpdev), > + "nvlink2-mr[0]", NULL); > + > + if (nv_mrobj) { > + memory_region_del_subregion(get_system_memory(), > + MEMORY_REGION(nv_mrobj)); > + } > + for (j = 0; j < nvslot->linknum; ++j) { > + PCIDevice *npdev = nvslot->links[j].npdev; > + Object *atsd_mrobj; > + atsd_mrobj = object_property_get_link(OBJECT(npdev), > + "nvlink2-atsd-mr[0]", NULL); > + if (atsd_mrobj) { > + memory_region_del_subregion(get_system_memory(), > + MEMORY_REGION(atsd_mrobj)); > + } > + } > + } > + g_free(sphb->nvgpus); > + sphb->nvgpus = NULL; > +} > + > +void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, int bus_off, > + Error **errp) > +{ > + int i, j, atsdnum = 0; > + uint64_t atsd[8]; /* The existing limitation of known guests */ > + > + if (!sphb->nvgpus) { > + return; > + } > + > + for (i = 0; (i < sphb->nvgpus->num) && (atsdnum < ARRAY_SIZE(atsd)); ++i) { > + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; > + > + if (!nvslot->gpdev) { > + continue; > + } > + for (j = 0; j < nvslot->linknum; ++j) { > + if (!nvslot->links[j].atsd_gpa) { > + continue; > + } > + > + if (atsdnum == ARRAY_SIZE(atsd)) { > + error_report("Only %"PRIuPTR" ATSD registers supported", > + ARRAY_SIZE(atsd)); > + break; > + } > + atsd[atsdnum] = cpu_to_be64(nvslot->links[j].atsd_gpa); > + ++atsdnum; > + } > + } > + > + if (!atsdnum) { > + error_setg(errp, "No ATSD registers found"); > + return; > + } > + > + if (!spapr_phb_eeh_available(sphb)) { > + /* > + * ibm,mmio-atsd contains ATSD registers; these belong to an NPU PHB > + * which we do not emulate as a separate device. Instead we put > + * ibm,mmio-atsd to the vPHB with GPU and make sure that we do not > + * put GPUs from different IOMMU groups to the same vPHB to ensure > + * that the guest will use ATSDs from the corresponding NPU. > + */ > + error_setg(errp, "ATSD requires separate vPHB per GPU IOMMU group"); > + return; > + } > + > + _FDT((fdt_setprop(fdt, bus_off, "ibm,mmio-atsd", atsd, > + atsdnum * sizeof(atsd[0])))); > +} > + > +void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt) > +{ > + int i, j, linkidx, npuoff; > + char *npuname; > + > + if (!sphb->nvgpus) { > + return; > + } > + > + npuname = g_strdup_printf("npuphb%d", sphb->index); > + npuoff = fdt_add_subnode(fdt, 0, npuname); > + _FDT(npuoff); > + _FDT(fdt_setprop_cell(fdt, npuoff, "#address-cells", 1)); > + _FDT(fdt_setprop_cell(fdt, npuoff, "#size-cells", 0)); > + /* Advertise NPU as POWER9 so the guest can enable NPU2 contexts */ > + _FDT((fdt_setprop_string(fdt, npuoff, "compatible", "ibm,power9-npu"))); > + g_free(npuname); > + > + for (i = 0, linkidx = 0; i < sphb->nvgpus->num; ++i) { > + for (j = 0; j < sphb->nvgpus->slots[i].linknum; ++j) { > + char *linkname = g_strdup_printf("link@%d", linkidx); > + int off = fdt_add_subnode(fdt, npuoff, linkname); > + > + _FDT(off); > + /* _FDT((fdt_setprop_cell(fdt, off, "reg", linkidx))); */ > + _FDT((fdt_setprop_string(fdt, off, "compatible", > + "ibm,npu-link"))); > + _FDT((fdt_setprop_cell(fdt, off, "phandle", > + PHANDLE_NVLINK(sphb, i, j)))); > + _FDT((fdt_setprop_cell(fdt, off, "ibm,npu-link-index", linkidx))); > + g_free(linkname); > + ++linkidx; > + } > + } > + > + /* Add memory nodes for GPU RAM and mark them unusable */ > + for (i = 0; i < sphb->nvgpus->num; ++i) { > + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; > + Object *nv_mrobj = object_property_get_link(OBJECT(nvslot->gpdev), > + "nvlink2-mr[0]", NULL); > + uint32_t associativity[] = { > + cpu_to_be32(0x4), > + SPAPR_GPU_NUMA_ID, > + SPAPR_GPU_NUMA_ID, > + SPAPR_GPU_NUMA_ID, > + cpu_to_be32(nvslot->numa_id) > + }; > + uint64_t size = object_property_get_uint(nv_mrobj, "size", NULL); > + uint64_t mem_reg[2] = { cpu_to_be64(nvslot->gpa), cpu_to_be64(size) }; > + char *mem_name = g_strdup_printf("memory@%"PRIx64, nvslot->gpa); > + int off = fdt_add_subnode(fdt, 0, mem_name); > + > + _FDT(off); > + _FDT((fdt_setprop_string(fdt, off, "device_type", "memory"))); > + _FDT((fdt_setprop(fdt, off, "reg", mem_reg, sizeof(mem_reg)))); > + _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity, > + sizeof(associativity)))); > + > + _FDT((fdt_setprop_string(fdt, off, "compatible", > + "ibm,coherent-device-memory"))); > + > + mem_reg[1] = cpu_to_be64(0); > + _FDT((fdt_setprop(fdt, off, "linux,usable-memory", mem_reg, > + sizeof(mem_reg)))); > + _FDT((fdt_setprop_cell(fdt, off, "phandle", > + PHANDLE_GPURAM(sphb, i)))); > + g_free(mem_name); > + } > + > +} > + > +void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset, > + SpaprPhbState *sphb) > +{ > + int i, j; > + > + if (!sphb->nvgpus) { > + return; > + } > + > + for (i = 0; i < sphb->nvgpus->num; ++i) { > + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; > + > + /* Skip "slot" without attached GPU */ > + if (!nvslot->gpdev) { > + continue; > + } > + if (dev == nvslot->gpdev) { > + uint32_t npus[nvslot->linknum]; > + > + for (j = 0; j < nvslot->linknum; ++j) { > + PCIDevice *npdev = nvslot->links[j].npdev; > + > + npus[j] = cpu_to_be32(PHANDLE_PCIDEV(sphb, npdev)); > + } > + _FDT(fdt_setprop(fdt, offset, "ibm,npu", npus, > + j * sizeof(npus[0]))); > + _FDT((fdt_setprop_cell(fdt, offset, "phandle", > + PHANDLE_PCIDEV(sphb, dev)))); > + continue; > + } > + > + for (j = 0; j < nvslot->linknum; ++j) { > + if (dev != nvslot->links[j].npdev) { > + continue; > + } > + > + _FDT((fdt_setprop_cell(fdt, offset, "phandle", > + PHANDLE_PCIDEV(sphb, dev)))); > + _FDT(fdt_setprop_cell(fdt, offset, "ibm,gpu", > + PHANDLE_PCIDEV(sphb, nvslot->gpdev))); > + _FDT((fdt_setprop_cell(fdt, offset, "ibm,nvlink", > + PHANDLE_NVLINK(sphb, i, j)))); > + /* > + * If we ever want to emulate GPU RAM at the same location as on > + * the host - here is the encoding GPA->TGT: > + * > + * gta = ((sphb->nv2_gpa >> 42) & 0x1) << 42; > + * gta |= ((sphb->nv2_gpa >> 45) & 0x3) << 43; > + * gta |= ((sphb->nv2_gpa >> 49) & 0x3) << 45; > + * gta |= sphb->nv2_gpa & ((1UL << 43) - 1); > + */ > + _FDT(fdt_setprop_cell(fdt, offset, "memory-region", > + PHANDLE_GPURAM(sphb, i))); > + _FDT(fdt_setprop_u64(fdt, offset, "ibm,device-tgt-addr", > + nvslot->tgt)); > + _FDT(fdt_setprop_cell(fdt, offset, "ibm,nvlink-speed", > + nvslot->links[j].link_speed)); > + } > + } > +} > diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c > index 40a12001f580..29b2697fe12c 100644 > --- a/hw/vfio/pci-quirks.c > +++ b/hw/vfio/pci-quirks.c > @@ -2180,3 +2180,134 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp) > > return 0; > } > + > +static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v, > + const char *name, > + void *opaque, Error **errp) > +{ > + uint64_t tgt = (uintptr_t) opaque; > + visit_type_uint64(v, name, &tgt, errp); > +} > + > +static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v, > + const char *name, > + void *opaque, Error **errp) > +{ > + uint32_t link_speed = (uint32_t)(uintptr_t) opaque; > + visit_type_uint32(v, name, &link_speed, errp); > +} > + > +int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp) > +{ > + int ret; > + void *p; > + struct vfio_region_info *nv2reg = NULL; > + struct vfio_info_cap_header *hdr; > + struct vfio_region_info_cap_nvlink2_ssatgt *cap; > + VFIOQuirk *quirk; > + > + ret = vfio_get_dev_region_info(&vdev->vbasedev, > + VFIO_REGION_TYPE_PCI_VENDOR_TYPE | > + PCI_VENDOR_ID_NVIDIA, > + VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM, > + &nv2reg); > + if (ret) { > + return ret; > + } > + > + hdr = vfio_get_region_info_cap(nv2reg, VFIO_REGION_INFO_CAP_NVLINK2_SSATGT); > + if (!hdr) { > + ret = -ENODEV; > + goto free_exit; > + } > + cap = (void *) hdr; > + > + p = mmap(NULL, nv2reg->size, PROT_READ | PROT_WRITE | PROT_EXEC, > + MAP_SHARED, vdev->vbasedev.fd, nv2reg->offset); > + if (p == MAP_FAILED) { > + ret = -errno; > + goto free_exit; > + } > + > + quirk = vfio_quirk_alloc(1); > + memory_region_init_ram_ptr(&quirk->mem[0], OBJECT(vdev), "nvlink2-mr", > + nv2reg->size, p); > + QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next); > + > + object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64", > + vfio_pci_nvlink2_get_tgt, NULL, NULL, > + (void *) (uintptr_t) cap->tgt, NULL); > + trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt, > + nv2reg->size); > +free_exit: > + g_free(nv2reg); > + > + return ret; > +} > + > +int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp) > +{ > + int ret; > + void *p; > + struct vfio_region_info *atsdreg = NULL; > + struct vfio_info_cap_header *hdr; > + struct vfio_region_info_cap_nvlink2_ssatgt *captgt; > + struct vfio_region_info_cap_nvlink2_lnkspd *capspeed; > + VFIOQuirk *quirk; > + > + ret = vfio_get_dev_region_info(&vdev->vbasedev, > + VFIO_REGION_TYPE_PCI_VENDOR_TYPE | > + PCI_VENDOR_ID_IBM, > + VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD, > + &atsdreg); > + if (ret) { > + return ret; > + } > + > + hdr = vfio_get_region_info_cap(atsdreg, > + VFIO_REGION_INFO_CAP_NVLINK2_SSATGT); > + if (!hdr) { > + ret = -ENODEV; > + goto free_exit; > + } > + captgt = (void *) hdr; > + > + hdr = vfio_get_region_info_cap(atsdreg, > + VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD); > + if (!hdr) { > + ret = -ENODEV; > + goto free_exit; > + } > + capspeed = (void *) hdr; > + > + /* Some NVLink bridges may not have assigned ATSD */ > + if (atsdreg->size) { > + p = mmap(NULL, atsdreg->size, PROT_READ | PROT_WRITE | PROT_EXEC, > + MAP_SHARED, vdev->vbasedev.fd, atsdreg->offset); > + if (p == MAP_FAILED) { > + ret = -errno; > + goto free_exit; > + } > + > + quirk = vfio_quirk_alloc(1); > + memory_region_init_ram_device_ptr(&quirk->mem[0], OBJECT(vdev), > + "nvlink2-atsd-mr", atsdreg->size, p); > + QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next); > + } > + > + object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64", > + vfio_pci_nvlink2_get_tgt, NULL, NULL, > + (void *) (uintptr_t) captgt->tgt, NULL); > + trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt, > + atsdreg->size); > + > + object_property_add(OBJECT(vdev), "nvlink2-link-speed", "uint32", > + vfio_pci_nvlink2_get_link_speed, NULL, NULL, > + (void *) (uintptr_t) capspeed->link_speed, NULL); > + trace_vfio_pci_nvlink2_setup_quirk_lnkspd(vdev->vbasedev.name, > + capspeed->link_speed); > +free_exit: > + g_free(atsdreg); > + > + return ret; > +} > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c > index dd12f363915d..07aa141aabe6 100644 > --- a/hw/vfio/pci.c > +++ b/hw/vfio/pci.c > @@ -3069,6 +3069,20 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) > goto out_teardown; > } > > + if (vdev->vendor_id == PCI_VENDOR_ID_NVIDIA) { > + ret = vfio_pci_nvidia_v100_ram_init(vdev, errp); > + if (ret && ret != -ENODEV) { > + error_report("Failed to setup NVIDIA V100 GPU RAM"); > + } > + } > + > + if (vdev->vendor_id == PCI_VENDOR_ID_IBM) { > + ret = vfio_pci_nvlink2_init(vdev, errp); > + if (ret && ret != -ENODEV) { > + error_report("Failed to setup NVlink2 bridge"); > + } > + } > + > vfio_register_err_notifier(vdev); > vfio_register_req_notifier(vdev); > vfio_setup_resetfn_quirk(vdev); > diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events > index cf1e8868182b..88841e9a61da 100644 > --- a/hw/vfio/trace-events > +++ b/hw/vfio/trace-events > @@ -87,6 +87,10 @@ vfio_pci_igd_opregion_enabled(const char *name) "%s" > vfio_pci_igd_host_bridge_enabled(const char *name) "%s" > vfio_pci_igd_lpc_bridge_enabled(const char *name) "%s" > > +vfio_pci_nvidia_gpu_setup_quirk(const char *name, uint64_t tgt, uint64_t size) "%s tgt=0x%"PRIx64" size=0x%"PRIx64 > +vfio_pci_nvlink2_setup_quirk_ssatgt(const char *name, uint64_t tgt, uint64_t size) "%s tgt=0x%"PRIx64" size=0x%"PRIx64 > +vfio_pci_nvlink2_setup_quirk_lnkspd(const char *name, uint32_t link_speed) "%s link_speed=0x%x" > + > # hw/vfio/common.c > vfio_region_write(const char *name, int index, uint64_t addr, uint64_t data, unsigned size) " (%s:region%d+0x%"PRIx64", 0x%"PRIx64 ", %d)" > vfio_region_read(char *name, int index, uint64_t addr, unsigned size, uint64_t data) " (%s:region%d+0x%"PRIx64", %d) = 0x%"PRIx64
diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs index 1111b218a048..636e717f207c 100644 --- a/hw/ppc/Makefile.objs +++ b/hw/ppc/Makefile.objs @@ -9,7 +9,7 @@ obj-$(CONFIG_SPAPR_RNG) += spapr_rng.o # IBM PowerNV obj-$(CONFIG_POWERNV) += pnv.o pnv_xscom.o pnv_core.o pnv_lpc.o pnv_psi.o pnv_occ.o pnv_bmc.o ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy) -obj-y += spapr_pci_vfio.o +obj-y += spapr_pci_vfio.o spapr_pci_nvlink2.o endif obj-$(CONFIG_PSERIES) += spapr_rtas_ddw.o # PowerPC 4xx boards diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index b1ae4c07549a..706c30443617 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -194,6 +194,8 @@ int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp); int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, struct vfio_region_info *info, Error **errp); +int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp); +int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp); void vfio_display_reset(VFIOPCIDevice *vdev); int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h index b4aad26798c0..53519c835e9f 100644 --- a/include/hw/pci-host/spapr.h +++ b/include/hw/pci-host/spapr.h @@ -87,6 +87,9 @@ struct SpaprPhbState { uint32_t mig_liobn; hwaddr mig_mem_win_addr, mig_mem_win_size; hwaddr mig_io_win_addr, mig_io_win_size; + hwaddr nv2_gpa_win_addr; + hwaddr nv2_atsd_win_addr; + struct spapr_phb_pci_nvgpu_config *nvgpus; }; #define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL @@ -105,6 +108,22 @@ struct SpaprPhbState { #define SPAPR_PCI_MSI_WINDOW 0x40000000000ULL +#define SPAPR_PCI_NV2RAM64_WIN_BASE SPAPR_PCI_LIMIT +#define SPAPR_PCI_NV2RAM64_WIN_SIZE (2 * TiB) /* For up to 6 GPUs 256GB each */ + +/* Max number of these GPUsper a physical box */ +#define NVGPU_MAX_NUM 6 +/* Max number of NVLinks per GPU in any physical box */ +#define NVGPU_MAX_LINKS 3 + +/* + * GPU RAM starts at 64TiB so huge DMA window to cover it all ends at 128TiB + * which is enough. We do not need DMA for ATSD so we put them at 128TiB. + */ +#define SPAPR_PCI_NV2ATSD_WIN_BASE (128 * TiB) +#define SPAPR_PCI_NV2ATSD_WIN_SIZE (NVGPU_MAX_NUM * NVGPU_MAX_LINKS * \ + 64 * KiB) + static inline qemu_irq spapr_phb_lsi_qirq(struct SpaprPhbState *phb, int pin) { SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); @@ -135,6 +154,13 @@ int spapr_phb_vfio_eeh_get_state(SpaprPhbState *sphb, int *state); int spapr_phb_vfio_eeh_reset(SpaprPhbState *sphb, int option); int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb); void spapr_phb_vfio_reset(DeviceState *qdev); +void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp); +void spapr_phb_nvgpu_free(SpaprPhbState *sphb); +void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, int bus_off, + Error **errp); +void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt); +void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset, + SpaprPhbState *sphb); #else static inline bool spapr_phb_eeh_available(SpaprPhbState *sphb) { @@ -161,6 +187,25 @@ static inline int spapr_phb_vfio_eeh_configure(SpaprPhbState *sphb) static inline void spapr_phb_vfio_reset(DeviceState *qdev) { } +static inline void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp) +{ +} +static inline void spapr_phb_nvgpu_free(SpaprPhbState *sphb) +{ +} +static inline void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, + int bus_off, Error **errp) +{ +} +static inline void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, + void *fdt) +{ +} +static inline void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, + int offset, + SpaprPhbState *sphb) +{ +} #endif void spapr_phb_dma_reset(SpaprPhbState *sphb); diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 2b4c05a2ec33..74ce638bc10a 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -122,7 +122,8 @@ struct SpaprMachineClass { void (*phb_placement)(SpaprMachineState *spapr, uint32_t index, uint64_t *buid, hwaddr *pio, hwaddr *mmio32, hwaddr *mmio64, - unsigned n_dma, uint32_t *liobns, Error **errp); + unsigned n_dma, uint32_t *liobns, hwaddr *nv2gpa, + hwaddr *nv2atsd, Error **errp); SpaprResizeHpt resize_hpt_default; SpaprCapabilities default_caps; SpaprIrq *irq; @@ -198,6 +199,8 @@ struct SpaprMachineState { bool cmd_line_caps[SPAPR_CAP_NUM]; SpaprCapabilities def, eff, mig; + + unsigned gpu_numa_id; }; #define H_SUCCESS 0 diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 20cade50d5d0..7cb7e0c126e7 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1034,12 +1034,13 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) 0, cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE), cpu_to_be32(max_cpus / smp_threads), }; + uint32_t maxdomain = cpu_to_be32(spapr->gpu_numa_id > 1 ? 1 : 0); uint32_t maxdomains[] = { cpu_to_be32(4), - cpu_to_be32(0), - cpu_to_be32(0), - cpu_to_be32(0), - cpu_to_be32(nb_numa_nodes ? nb_numa_nodes : 1), + maxdomain, + maxdomain, + maxdomain, + cpu_to_be32(spapr->gpu_numa_id), }; _FDT(rtas = fdt_add_subnode(fdt, 0, "rtas")); @@ -1713,6 +1714,16 @@ static void spapr_machine_reset(void) spapr_irq_msi_reset(spapr); } + /* + * NVLink2-connected GPU RAM needs to be placed on a separate NUMA node. + * We assign a new numa ID per GPU in spapr_pci_collect_nvgpu() which is + * called from vPHB reset handler so we initialize the counter here. + * If no NUMA is configured from the QEMU side, we start from 1 as GPU RAM + * must be equally distant from any other node. + * The final value of spapr->gpu_numa_id is going to be written to + * max-associativity-domains in spapr_build_fdt(). + */ + spapr->gpu_numa_id = MAX(1, nb_numa_nodes); qemu_devices_reset(); /* @@ -3935,7 +3946,9 @@ static void spapr_phb_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, smc->phb_placement(spapr, sphb->index, &sphb->buid, &sphb->io_win_addr, &sphb->mem_win_addr, &sphb->mem64_win_addr, - windows_supported, sphb->dma_liobn, errp); + windows_supported, sphb->dma_liobn, + &sphb->nv2_gpa_win_addr, &sphb->nv2_atsd_win_addr, + errp); } static void spapr_phb_plug(HotplugHandler *hotplug_dev, DeviceState *dev, @@ -4136,7 +4149,8 @@ static const CPUArchIdList *spapr_possible_cpu_arch_ids(MachineState *machine) static void spapr_phb_placement(SpaprMachineState *spapr, uint32_t index, uint64_t *buid, hwaddr *pio, hwaddr *mmio32, hwaddr *mmio64, - unsigned n_dma, uint32_t *liobns, Error **errp) + unsigned n_dma, uint32_t *liobns, + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) { /* * New-style PHB window placement. @@ -4181,6 +4195,9 @@ static void spapr_phb_placement(SpaprMachineState *spapr, uint32_t index, *pio = SPAPR_PCI_BASE + index * SPAPR_PCI_IO_WIN_SIZE; *mmio32 = SPAPR_PCI_BASE + (index + 1) * SPAPR_PCI_MEM32_WIN_SIZE; *mmio64 = SPAPR_PCI_BASE + (index + 1) * SPAPR_PCI_MEM64_WIN_SIZE; + + *nv2gpa = SPAPR_PCI_NV2RAM64_WIN_BASE + index * SPAPR_PCI_NV2RAM64_WIN_SIZE; + *nv2atsd = SPAPR_PCI_NV2ATSD_WIN_BASE + index * SPAPR_PCI_NV2ATSD_WIN_SIZE; } static ICSState *spapr_ics_get(XICSFabric *dev, int irq) @@ -4385,6 +4402,18 @@ DEFINE_SPAPR_MACHINE(4_0, "4.0", true); /* * pseries-3.1 */ +static void phb_placement_3_1(SpaprMachineState *spapr, uint32_t index, + uint64_t *buid, hwaddr *pio, + hwaddr *mmio32, hwaddr *mmio64, + unsigned n_dma, uint32_t *liobns, + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) +{ + spapr_phb_placement(spapr, index, buid, pio, mmio32, mmio64, n_dma, liobns, + nv2gpa, nv2atsd, errp); + *nv2gpa = 0; + *nv2atsd = 0; +} + static void spapr_machine_3_1_class_options(MachineClass *mc) { SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc); @@ -4404,6 +4433,7 @@ static void spapr_machine_3_1_class_options(MachineClass *mc) smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN; smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF; + smc->phb_placement = phb_placement_3_1; } DEFINE_SPAPR_MACHINE(3_1, "3.1", false); @@ -4535,7 +4565,8 @@ DEFINE_SPAPR_MACHINE(2_8, "2.8", false); static void phb_placement_2_7(SpaprMachineState *spapr, uint32_t index, uint64_t *buid, hwaddr *pio, hwaddr *mmio32, hwaddr *mmio64, - unsigned n_dma, uint32_t *liobns, Error **errp) + unsigned n_dma, uint32_t *liobns, + hwaddr *nv2gpa, hwaddr *nv2atsd, Error **errp) { /* Legacy PHB placement for pseries-2.7 and earlier machine types */ const uint64_t base_buid = 0x800000020000000ULL; @@ -4579,6 +4610,9 @@ static void phb_placement_2_7(SpaprMachineState *spapr, uint32_t index, * fallback behaviour of automatically splitting a large "32-bit" * window into contiguous 32-bit and 64-bit windows */ + + *nv2gpa = 0; + *nv2atsd = 0; } static void spapr_machine_2_7_class_options(MachineClass *mc) diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 20915d2b3c19..67a277fae481 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1355,6 +1355,8 @@ static void spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset, if (sphb->pcie_ecs && pci_is_express(dev)) { _FDT(fdt_setprop_cell(fdt, offset, "ibm,pci-config-space-type", 0x1)); } + + spapr_phb_nvgpu_populate_pcidev_dt(dev, fdt, offset, sphb); } /* create OF node for pci device and required OF DT properties */ @@ -1589,6 +1591,8 @@ static void spapr_phb_unrealize(DeviceState *dev, Error **errp) int i; const unsigned windows_supported = spapr_phb_windows_supported(sphb); + spapr_phb_nvgpu_free(sphb); + if (sphb->msi) { g_hash_table_unref(sphb->msi); sphb->msi = NULL; @@ -1877,8 +1881,14 @@ void spapr_phb_dma_reset(SpaprPhbState *sphb) static void spapr_phb_reset(DeviceState *qdev) { SpaprPhbState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev); + Error *errp = NULL; spapr_phb_dma_reset(sphb); + spapr_phb_nvgpu_free(sphb); + spapr_phb_nvgpu_setup(sphb, &errp); + if (errp) { + error_report_err(errp); + } /* Reset the IOMMU state */ object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL); @@ -1911,6 +1921,8 @@ static Property spapr_phb_properties[] = { pre_2_8_migration, false), DEFINE_PROP_BOOL("pcie-extended-configuration-space", SpaprPhbState, pcie_ecs, true), + DEFINE_PROP_UINT64("gpa", SpaprPhbState, nv2_gpa_win_addr, 0), + DEFINE_PROP_UINT64("atsd", SpaprPhbState, nv2_atsd_win_addr, 0), DEFINE_PROP_END_OF_LIST(), }; @@ -2191,6 +2203,7 @@ int spapr_populate_pci_dt(SpaprPhbState *phb, uint32_t intc_phandle, void *fdt, PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus; SpaprFdt s_fdt; SpaprDrc *drc; + Error *errp = NULL; /* Start populating the FDT */ nodename = g_strdup_printf("pci@%" PRIx64, phb->buid); @@ -2283,6 +2296,12 @@ int spapr_populate_pci_dt(SpaprPhbState *phb, uint32_t intc_phandle, void *fdt, return ret; } + spapr_phb_nvgpu_populate_dt(phb, fdt, bus_off, &errp); + if (errp) { + error_report_err(errp); + } + spapr_phb_nvgpu_ram_populate_dt(phb, fdt); + return 0; } diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c new file mode 100644 index 000000000000..3aa66aff6dbd --- /dev/null +++ b/hw/ppc/spapr_pci_nvlink2.c @@ -0,0 +1,450 @@ +/* + * QEMU sPAPR PCI for NVLink2 pass through + * + * Copyright (c) 2019 Alexey Kardashevskiy, IBM Corporation. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "hw/pci/pci.h" +#include "hw/pci-host/spapr.h" +#include "qemu/error-report.h" +#include "hw/ppc/fdt.h" +#include "hw/pci/pci_bridge.h" + +#define PHANDLE_PCIDEV(phb, pdev) (0x12000000 | \ + (((phb)->index) << 16) | ((pdev)->devfn)) +#define PHANDLE_GPURAM(phb, n) (0x110000FF | ((n) << 8) | \ + (((phb)->index) << 16)) +#define PHANDLE_NVLINK(phb, gn, nn) (0x00130000 | (((phb)->index) << 8) | \ + ((gn) << 4) | (nn)) + +#define SPAPR_GPU_NUMA_ID (cpu_to_be32(1)) + +struct spapr_phb_pci_nvgpu_config { + uint64_t nv2_ram_current; + uint64_t nv2_atsd_current; + int num; /* number of non empty (i.e. tgt!=0) entries in slots[] */ + struct spapr_phb_pci_nvgpu_slot { + uint64_t tgt; + uint64_t gpa; + unsigned numa_id; + PCIDevice *gpdev; + int linknum; + struct { + uint64_t atsd_gpa; + PCIDevice *npdev; + uint32_t link_speed; + } links[NVGPU_MAX_LINKS]; + } slots[NVGPU_MAX_NUM]; + Error *errp; +}; + +static struct spapr_phb_pci_nvgpu_slot * +spapr_nvgpu_get_slot(struct spapr_phb_pci_nvgpu_config *nvgpus, uint64_t tgt) +{ + int i; + + /* Search for partially collected "slot" */ + for (i = 0; i < nvgpus->num; ++i) { + if (nvgpus->slots[i].tgt == tgt) { + return &nvgpus->slots[i]; + } + } + + if (nvgpus->num == ARRAY_SIZE(nvgpus->slots)) { + return NULL; + } + + i = nvgpus->num; + nvgpus->slots[i].tgt = tgt; + ++nvgpus->num; + + return &nvgpus->slots[i]; +} + +static void spapr_pci_collect_nvgpu(struct spapr_phb_pci_nvgpu_config *nvgpus, + PCIDevice *pdev, uint64_t tgt, + MemoryRegion *mr, Error **errp) +{ + MachineState *machine = MACHINE(qdev_get_machine()); + SpaprMachineState *spapr = SPAPR_MACHINE(machine); + struct spapr_phb_pci_nvgpu_slot *nvslot = spapr_nvgpu_get_slot(nvgpus, tgt); + + if (!nvslot) { + error_setg(errp, "Found too many NVLink bridges per GPU"); + return; + } + g_assert(!nvslot->gpdev); + nvslot->gpdev = pdev; + + nvslot->gpa = nvgpus->nv2_ram_current; + nvgpus->nv2_ram_current += memory_region_size(mr); + nvslot->numa_id = spapr->gpu_numa_id; + ++spapr->gpu_numa_id; +} + +static void spapr_pci_collect_nvnpu(struct spapr_phb_pci_nvgpu_config *nvgpus, + PCIDevice *pdev, uint64_t tgt, + MemoryRegion *mr, Error **errp) +{ + struct spapr_phb_pci_nvgpu_slot *nvslot = spapr_nvgpu_get_slot(nvgpus, tgt); + int j; + + if (!nvslot) { + error_setg(errp, "Found too many NVLink bridges per GPU"); + return; + } + + j = nvslot->linknum; + if (j == ARRAY_SIZE(nvslot->links)) { + error_setg(errp, "Found too many NVLink2 bridges"); + return; + } + ++nvslot->linknum; + + g_assert(!nvslot->links[j].npdev); + nvslot->links[j].npdev = pdev; + nvslot->links[j].atsd_gpa = nvgpus->nv2_atsd_current; + nvgpus->nv2_atsd_current += memory_region_size(mr); + nvslot->links[j].link_speed = + object_property_get_uint(OBJECT(pdev), "nvlink2-link-speed", NULL); +} + +static void spapr_phb_pci_collect_nvgpu(PCIBus *bus, PCIDevice *pdev, + void *opaque) +{ + PCIBus *sec_bus; + Object *po = OBJECT(pdev); + uint64_t tgt = object_property_get_uint(po, "nvlink2-tgt", NULL); + + if (tgt) { + Error *local_err = NULL; + struct spapr_phb_pci_nvgpu_config *nvgpus = opaque; + Object *mr_gpu = object_property_get_link(po, "nvlink2-mr[0]", NULL); + Object *mr_npu = object_property_get_link(po, "nvlink2-atsd-mr[0]", + NULL); + + g_assert(mr_gpu || mr_npu); + if (mr_gpu) { + spapr_pci_collect_nvgpu(nvgpus, pdev, tgt, MEMORY_REGION(mr_gpu), + &local_err); + } else { + spapr_pci_collect_nvnpu(nvgpus, pdev, tgt, MEMORY_REGION(mr_npu), + &local_err); + } + error_propagate(&nvgpus->errp, local_err); + } + if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != + PCI_HEADER_TYPE_BRIDGE)) { + return; + } + + sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); + if (!sec_bus) { + return; + } + + pci_for_each_device(sec_bus, pci_bus_num(sec_bus), + spapr_phb_pci_collect_nvgpu, opaque); +} + +void spapr_phb_nvgpu_setup(SpaprPhbState *sphb, Error **errp) +{ + int i, j, valid_gpu_num; + PCIBus *bus; + + /* Search for GPUs and NPUs */ + if (!sphb->nv2_gpa_win_addr || !sphb->nv2_atsd_win_addr) { + return; + } + + sphb->nvgpus = g_new0(struct spapr_phb_pci_nvgpu_config, 1); + sphb->nvgpus->nv2_ram_current = sphb->nv2_gpa_win_addr; + sphb->nvgpus->nv2_atsd_current = sphb->nv2_atsd_win_addr; + + bus = PCI_HOST_BRIDGE(sphb)->bus; + pci_for_each_device(bus, pci_bus_num(bus), + spapr_phb_pci_collect_nvgpu, sphb->nvgpus); + + if (sphb->nvgpus->errp) { + error_propagate(errp, sphb->nvgpus->errp); + sphb->nvgpus->errp = NULL; + goto cleanup_exit; + } + + /* Add found GPU RAM and ATSD MRs if found */ + for (i = 0, valid_gpu_num = 0; i < sphb->nvgpus->num; ++i) { + Object *nvmrobj; + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; + + if (!nvslot->gpdev) { + continue; + } + nvmrobj = object_property_get_link(OBJECT(nvslot->gpdev), + "nvlink2-mr[0]", NULL); + /* ATSD is pointless without GPU RAM MR so skip those */ + if (!nvmrobj) { + continue; + } + + ++valid_gpu_num; + memory_region_add_subregion(get_system_memory(), nvslot->gpa, + MEMORY_REGION(nvmrobj)); + + for (j = 0; j < nvslot->linknum; ++j) { + Object *atsdmrobj; + + atsdmrobj = object_property_get_link(OBJECT(nvslot->links[j].npdev), + "nvlink2-atsd-mr[0]", NULL); + if (!atsdmrobj) { + continue; + } + memory_region_add_subregion(get_system_memory(), + nvslot->links[j].atsd_gpa, + MEMORY_REGION(atsdmrobj)); + } + } + + if (valid_gpu_num) { + return; + } + /* We did not find any interesting GPU */ +cleanup_exit: + g_free(sphb->nvgpus); + sphb->nvgpus = NULL; +} + +void spapr_phb_nvgpu_free(SpaprPhbState *sphb) +{ + int i, j; + + if (!sphb->nvgpus) { + return; + } + + for (i = 0; i < sphb->nvgpus->num; ++i) { + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; + Object *nv_mrobj = object_property_get_link(OBJECT(nvslot->gpdev), + "nvlink2-mr[0]", NULL); + + if (nv_mrobj) { + memory_region_del_subregion(get_system_memory(), + MEMORY_REGION(nv_mrobj)); + } + for (j = 0; j < nvslot->linknum; ++j) { + PCIDevice *npdev = nvslot->links[j].npdev; + Object *atsd_mrobj; + atsd_mrobj = object_property_get_link(OBJECT(npdev), + "nvlink2-atsd-mr[0]", NULL); + if (atsd_mrobj) { + memory_region_del_subregion(get_system_memory(), + MEMORY_REGION(atsd_mrobj)); + } + } + } + g_free(sphb->nvgpus); + sphb->nvgpus = NULL; +} + +void spapr_phb_nvgpu_populate_dt(SpaprPhbState *sphb, void *fdt, int bus_off, + Error **errp) +{ + int i, j, atsdnum = 0; + uint64_t atsd[8]; /* The existing limitation of known guests */ + + if (!sphb->nvgpus) { + return; + } + + for (i = 0; (i < sphb->nvgpus->num) && (atsdnum < ARRAY_SIZE(atsd)); ++i) { + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; + + if (!nvslot->gpdev) { + continue; + } + for (j = 0; j < nvslot->linknum; ++j) { + if (!nvslot->links[j].atsd_gpa) { + continue; + } + + if (atsdnum == ARRAY_SIZE(atsd)) { + error_report("Only %"PRIuPTR" ATSD registers supported", + ARRAY_SIZE(atsd)); + break; + } + atsd[atsdnum] = cpu_to_be64(nvslot->links[j].atsd_gpa); + ++atsdnum; + } + } + + if (!atsdnum) { + error_setg(errp, "No ATSD registers found"); + return; + } + + if (!spapr_phb_eeh_available(sphb)) { + /* + * ibm,mmio-atsd contains ATSD registers; these belong to an NPU PHB + * which we do not emulate as a separate device. Instead we put + * ibm,mmio-atsd to the vPHB with GPU and make sure that we do not + * put GPUs from different IOMMU groups to the same vPHB to ensure + * that the guest will use ATSDs from the corresponding NPU. + */ + error_setg(errp, "ATSD requires separate vPHB per GPU IOMMU group"); + return; + } + + _FDT((fdt_setprop(fdt, bus_off, "ibm,mmio-atsd", atsd, + atsdnum * sizeof(atsd[0])))); +} + +void spapr_phb_nvgpu_ram_populate_dt(SpaprPhbState *sphb, void *fdt) +{ + int i, j, linkidx, npuoff; + char *npuname; + + if (!sphb->nvgpus) { + return; + } + + npuname = g_strdup_printf("npuphb%d", sphb->index); + npuoff = fdt_add_subnode(fdt, 0, npuname); + _FDT(npuoff); + _FDT(fdt_setprop_cell(fdt, npuoff, "#address-cells", 1)); + _FDT(fdt_setprop_cell(fdt, npuoff, "#size-cells", 0)); + /* Advertise NPU as POWER9 so the guest can enable NPU2 contexts */ + _FDT((fdt_setprop_string(fdt, npuoff, "compatible", "ibm,power9-npu"))); + g_free(npuname); + + for (i = 0, linkidx = 0; i < sphb->nvgpus->num; ++i) { + for (j = 0; j < sphb->nvgpus->slots[i].linknum; ++j) { + char *linkname = g_strdup_printf("link@%d", linkidx); + int off = fdt_add_subnode(fdt, npuoff, linkname); + + _FDT(off); + /* _FDT((fdt_setprop_cell(fdt, off, "reg", linkidx))); */ + _FDT((fdt_setprop_string(fdt, off, "compatible", + "ibm,npu-link"))); + _FDT((fdt_setprop_cell(fdt, off, "phandle", + PHANDLE_NVLINK(sphb, i, j)))); + _FDT((fdt_setprop_cell(fdt, off, "ibm,npu-link-index", linkidx))); + g_free(linkname); + ++linkidx; + } + } + + /* Add memory nodes for GPU RAM and mark them unusable */ + for (i = 0; i < sphb->nvgpus->num; ++i) { + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; + Object *nv_mrobj = object_property_get_link(OBJECT(nvslot->gpdev), + "nvlink2-mr[0]", NULL); + uint32_t associativity[] = { + cpu_to_be32(0x4), + SPAPR_GPU_NUMA_ID, + SPAPR_GPU_NUMA_ID, + SPAPR_GPU_NUMA_ID, + cpu_to_be32(nvslot->numa_id) + }; + uint64_t size = object_property_get_uint(nv_mrobj, "size", NULL); + uint64_t mem_reg[2] = { cpu_to_be64(nvslot->gpa), cpu_to_be64(size) }; + char *mem_name = g_strdup_printf("memory@%"PRIx64, nvslot->gpa); + int off = fdt_add_subnode(fdt, 0, mem_name); + + _FDT(off); + _FDT((fdt_setprop_string(fdt, off, "device_type", "memory"))); + _FDT((fdt_setprop(fdt, off, "reg", mem_reg, sizeof(mem_reg)))); + _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity, + sizeof(associativity)))); + + _FDT((fdt_setprop_string(fdt, off, "compatible", + "ibm,coherent-device-memory"))); + + mem_reg[1] = cpu_to_be64(0); + _FDT((fdt_setprop(fdt, off, "linux,usable-memory", mem_reg, + sizeof(mem_reg)))); + _FDT((fdt_setprop_cell(fdt, off, "phandle", + PHANDLE_GPURAM(sphb, i)))); + g_free(mem_name); + } + +} + +void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset, + SpaprPhbState *sphb) +{ + int i, j; + + if (!sphb->nvgpus) { + return; + } + + for (i = 0; i < sphb->nvgpus->num; ++i) { + struct spapr_phb_pci_nvgpu_slot *nvslot = &sphb->nvgpus->slots[i]; + + /* Skip "slot" without attached GPU */ + if (!nvslot->gpdev) { + continue; + } + if (dev == nvslot->gpdev) { + uint32_t npus[nvslot->linknum]; + + for (j = 0; j < nvslot->linknum; ++j) { + PCIDevice *npdev = nvslot->links[j].npdev; + + npus[j] = cpu_to_be32(PHANDLE_PCIDEV(sphb, npdev)); + } + _FDT(fdt_setprop(fdt, offset, "ibm,npu", npus, + j * sizeof(npus[0]))); + _FDT((fdt_setprop_cell(fdt, offset, "phandle", + PHANDLE_PCIDEV(sphb, dev)))); + continue; + } + + for (j = 0; j < nvslot->linknum; ++j) { + if (dev != nvslot->links[j].npdev) { + continue; + } + + _FDT((fdt_setprop_cell(fdt, offset, "phandle", + PHANDLE_PCIDEV(sphb, dev)))); + _FDT(fdt_setprop_cell(fdt, offset, "ibm,gpu", + PHANDLE_PCIDEV(sphb, nvslot->gpdev))); + _FDT((fdt_setprop_cell(fdt, offset, "ibm,nvlink", + PHANDLE_NVLINK(sphb, i, j)))); + /* + * If we ever want to emulate GPU RAM at the same location as on + * the host - here is the encoding GPA->TGT: + * + * gta = ((sphb->nv2_gpa >> 42) & 0x1) << 42; + * gta |= ((sphb->nv2_gpa >> 45) & 0x3) << 43; + * gta |= ((sphb->nv2_gpa >> 49) & 0x3) << 45; + * gta |= sphb->nv2_gpa & ((1UL << 43) - 1); + */ + _FDT(fdt_setprop_cell(fdt, offset, "memory-region", + PHANDLE_GPURAM(sphb, i))); + _FDT(fdt_setprop_u64(fdt, offset, "ibm,device-tgt-addr", + nvslot->tgt)); + _FDT(fdt_setprop_cell(fdt, offset, "ibm,nvlink-speed", + nvslot->links[j].link_speed)); + } + } +} diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c index 40a12001f580..29b2697fe12c 100644 --- a/hw/vfio/pci-quirks.c +++ b/hw/vfio/pci-quirks.c @@ -2180,3 +2180,134 @@ int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp) return 0; } + +static void vfio_pci_nvlink2_get_tgt(Object *obj, Visitor *v, + const char *name, + void *opaque, Error **errp) +{ + uint64_t tgt = (uintptr_t) opaque; + visit_type_uint64(v, name, &tgt, errp); +} + +static void vfio_pci_nvlink2_get_link_speed(Object *obj, Visitor *v, + const char *name, + void *opaque, Error **errp) +{ + uint32_t link_speed = (uint32_t)(uintptr_t) opaque; + visit_type_uint32(v, name, &link_speed, errp); +} + +int vfio_pci_nvidia_v100_ram_init(VFIOPCIDevice *vdev, Error **errp) +{ + int ret; + void *p; + struct vfio_region_info *nv2reg = NULL; + struct vfio_info_cap_header *hdr; + struct vfio_region_info_cap_nvlink2_ssatgt *cap; + VFIOQuirk *quirk; + + ret = vfio_get_dev_region_info(&vdev->vbasedev, + VFIO_REGION_TYPE_PCI_VENDOR_TYPE | + PCI_VENDOR_ID_NVIDIA, + VFIO_REGION_SUBTYPE_NVIDIA_NVLINK2_RAM, + &nv2reg); + if (ret) { + return ret; + } + + hdr = vfio_get_region_info_cap(nv2reg, VFIO_REGION_INFO_CAP_NVLINK2_SSATGT); + if (!hdr) { + ret = -ENODEV; + goto free_exit; + } + cap = (void *) hdr; + + p = mmap(NULL, nv2reg->size, PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_SHARED, vdev->vbasedev.fd, nv2reg->offset); + if (p == MAP_FAILED) { + ret = -errno; + goto free_exit; + } + + quirk = vfio_quirk_alloc(1); + memory_region_init_ram_ptr(&quirk->mem[0], OBJECT(vdev), "nvlink2-mr", + nv2reg->size, p); + QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next); + + object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64", + vfio_pci_nvlink2_get_tgt, NULL, NULL, + (void *) (uintptr_t) cap->tgt, NULL); + trace_vfio_pci_nvidia_gpu_setup_quirk(vdev->vbasedev.name, cap->tgt, + nv2reg->size); +free_exit: + g_free(nv2reg); + + return ret; +} + +int vfio_pci_nvlink2_init(VFIOPCIDevice *vdev, Error **errp) +{ + int ret; + void *p; + struct vfio_region_info *atsdreg = NULL; + struct vfio_info_cap_header *hdr; + struct vfio_region_info_cap_nvlink2_ssatgt *captgt; + struct vfio_region_info_cap_nvlink2_lnkspd *capspeed; + VFIOQuirk *quirk; + + ret = vfio_get_dev_region_info(&vdev->vbasedev, + VFIO_REGION_TYPE_PCI_VENDOR_TYPE | + PCI_VENDOR_ID_IBM, + VFIO_REGION_SUBTYPE_IBM_NVLINK2_ATSD, + &atsdreg); + if (ret) { + return ret; + } + + hdr = vfio_get_region_info_cap(atsdreg, + VFIO_REGION_INFO_CAP_NVLINK2_SSATGT); + if (!hdr) { + ret = -ENODEV; + goto free_exit; + } + captgt = (void *) hdr; + + hdr = vfio_get_region_info_cap(atsdreg, + VFIO_REGION_INFO_CAP_NVLINK2_LNKSPD); + if (!hdr) { + ret = -ENODEV; + goto free_exit; + } + capspeed = (void *) hdr; + + /* Some NVLink bridges may not have assigned ATSD */ + if (atsdreg->size) { + p = mmap(NULL, atsdreg->size, PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_SHARED, vdev->vbasedev.fd, atsdreg->offset); + if (p == MAP_FAILED) { + ret = -errno; + goto free_exit; + } + + quirk = vfio_quirk_alloc(1); + memory_region_init_ram_device_ptr(&quirk->mem[0], OBJECT(vdev), + "nvlink2-atsd-mr", atsdreg->size, p); + QLIST_INSERT_HEAD(&vdev->bars[0].quirks, quirk, next); + } + + object_property_add(OBJECT(vdev), "nvlink2-tgt", "uint64", + vfio_pci_nvlink2_get_tgt, NULL, NULL, + (void *) (uintptr_t) captgt->tgt, NULL); + trace_vfio_pci_nvlink2_setup_quirk_ssatgt(vdev->vbasedev.name, captgt->tgt, + atsdreg->size); + + object_property_add(OBJECT(vdev), "nvlink2-link-speed", "uint32", + vfio_pci_nvlink2_get_link_speed, NULL, NULL, + (void *) (uintptr_t) capspeed->link_speed, NULL); + trace_vfio_pci_nvlink2_setup_quirk_lnkspd(vdev->vbasedev.name, + capspeed->link_speed); +free_exit: + g_free(atsdreg); + + return ret; +} diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index dd12f363915d..07aa141aabe6 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3069,6 +3069,20 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) goto out_teardown; } + if (vdev->vendor_id == PCI_VENDOR_ID_NVIDIA) { + ret = vfio_pci_nvidia_v100_ram_init(vdev, errp); + if (ret && ret != -ENODEV) { + error_report("Failed to setup NVIDIA V100 GPU RAM"); + } + } + + if (vdev->vendor_id == PCI_VENDOR_ID_IBM) { + ret = vfio_pci_nvlink2_init(vdev, errp); + if (ret && ret != -ENODEV) { + error_report("Failed to setup NVlink2 bridge"); + } + } + vfio_register_err_notifier(vdev); vfio_register_req_notifier(vdev); vfio_setup_resetfn_quirk(vdev); diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index cf1e8868182b..88841e9a61da 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -87,6 +87,10 @@ vfio_pci_igd_opregion_enabled(const char *name) "%s" vfio_pci_igd_host_bridge_enabled(const char *name) "%s" vfio_pci_igd_lpc_bridge_enabled(const char *name) "%s" +vfio_pci_nvidia_gpu_setup_quirk(const char *name, uint64_t tgt, uint64_t size) "%s tgt=0x%"PRIx64" size=0x%"PRIx64 +vfio_pci_nvlink2_setup_quirk_ssatgt(const char *name, uint64_t tgt, uint64_t size) "%s tgt=0x%"PRIx64" size=0x%"PRIx64 +vfio_pci_nvlink2_setup_quirk_lnkspd(const char *name, uint32_t link_speed) "%s link_speed=0x%x" + # hw/vfio/common.c vfio_region_write(const char *name, int index, uint64_t addr, uint64_t data, unsigned size) " (%s:region%d+0x%"PRIx64", 0x%"PRIx64 ", %d)" vfio_region_read(char *name, int index, uint64_t addr, unsigned size, uint64_t data) " (%s:region%d+0x%"PRIx64", %d) = 0x%"PRIx64