Hi Suzuki,
Please find my reply inline.
> -----Original Message-----
> From: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> Sent: Thursday, July 7, 2022 6:08 PM
> To: Besar Wicaksono <bwicaksono@xxxxxxxxxx>; robin.murphy@xxxxxxx;
> catalin.marinas@xxxxxxx; will@xxxxxxxxxx; mark.rutland@xxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-tegra@xxxxxxxxxxxxxxx; sudeep.holla@xxxxxxx;
> thanu.rangarajan@xxxxxxx; Michael.Williams@xxxxxxx; Thierry Reding
> <treding@xxxxxxxxxx>; Jonathan Hunter <jonathanh@xxxxxxxxxx>; Vikram
> Sethi <vsethi@xxxxxxxxxx>; mathieu.poirier@xxxxxxxxxx;
> mike.leach@xxxxxxxxxx; leo.yan@xxxxxxxxxx
> Subject: Re: [RESEND PATCH v3 2/2] perf: coresight_pmu: Add support for
> NVIDIA SCF and MCF attribute
>
> External email: Use caution opening links or attachments
>
>
> On 21/06/2022 06:50, Besar Wicaksono wrote:
> > Add support for NVIDIA System Cache Fabric (SCF) and Memory Control
> > Fabric (MCF) PMU attributes for CoreSight PMU implementation in
> > NVIDIA devices.
> >
> > Signed-off-by: Besar Wicaksono <bwicaksono@xxxxxxxxxx>
> > ---
> > drivers/perf/coresight_pmu/Makefile | 3 +-
> > .../perf/coresight_pmu/arm_coresight_pmu.c | 4 +
> > .../coresight_pmu/arm_coresight_pmu_nvidia.c | 312
> ++++++++++++++++++
> > .../coresight_pmu/arm_coresight_pmu_nvidia.h | 17 +
> > 4 files changed, 335 insertions(+), 1 deletion(-)
> > create mode 100644
> drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.c
> > create mode 100644
> drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.h
> >
> > diff --git a/drivers/perf/coresight_pmu/Makefile
> b/drivers/perf/coresight_pmu/Makefile
> > index a2a7a5fbbc16..181b1b0dbaa1 100644
> > --- a/drivers/perf/coresight_pmu/Makefile
> > +++ b/drivers/perf/coresight_pmu/Makefile
> > @@ -3,4 +3,5 @@
> > # SPDX-License-Identifier: GPL-2.0
> >
> > obj-$(CONFIG_ARM_CORESIGHT_PMU) += \
> > - arm_coresight_pmu.o
> > + arm_coresight_pmu.o \
> > + arm_coresight_pmu_nvidia.o
> > diff --git a/drivers/perf/coresight_pmu/arm_coresight_pmu.c
> b/drivers/perf/coresight_pmu/arm_coresight_pmu.c
> > index ba52cc592b2d..12179d029bfd 100644
> > --- a/drivers/perf/coresight_pmu/arm_coresight_pmu.c
> > +++ b/drivers/perf/coresight_pmu/arm_coresight_pmu.c
> > @@ -42,6 +42,7 @@
> > #include <acpi/processor.h>
> >
> > #include "arm_coresight_pmu.h"
> > +#include "arm_coresight_pmu_nvidia.h"
> >
> > #define PMUNAME "arm_system_pmu"
> >
> > @@ -396,6 +397,9 @@ struct impl_match {
> > };
> >
> > static const struct impl_match impl_match[] = {
> > + { .pmiidr = 0x36B,
> > + .mask = PMIIDR_IMPLEMENTER_MASK,
> > + .impl_init_ops = nv_coresight_init_ops },
> > {}
> > };
> >
> > diff --git a/drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.c
> b/drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.c
> > new file mode 100644
> > index 000000000000..54f4eae4c529
> > --- /dev/null
> > +++ b/drivers/perf/coresight_pmu/arm_coresight_pmu_nvidia.c
> > @@ -0,0 +1,312 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES.
> > + *
> > + */
> > +
> > +/* Support for NVIDIA specific attributes. */
> > +
> > +#include "arm_coresight_pmu_nvidia.h"
> > +
> > +#define NV_MCF_PCIE_PORT_COUNT 10ULL
> > +#define NV_MCF_PCIE_FILTER_ID_MASK ((1ULL <<
> NV_MCF_PCIE_PORT_COUNT) - 1)
> > +
> > +#define NV_MCF_GPU_PORT_COUNT 2ULL
> > +#define NV_MCF_GPU_FILTER_ID_MASK ((1ULL <<
> NV_MCF_GPU_PORT_COUNT) - 1)
> > +
> > +#define NV_MCF_NVLINK_PORT_COUNT 4ULL
> > +#define NV_MCF_NVLINK_FILTER_ID_MASK ((1ULL <<
> NV_MCF_NVLINK_PORT_COUNT) - 1)
> > +
> > +#define PMIIDR_PRODUCTID_MASK 0xFFF
> > +#define PMIIDR_PRODUCTID_SHIFT 20
> > +
> > +#define to_nv_pmu_impl(coresight_pmu) \
> > + (container_of(coresight_pmu->impl.ops, struct nv_pmu_impl, ops))
> > +
> > +#define CORESIGHT_EVENT_ATTR_4_INNER(_pref, _num, _suff, _config)
> \
> > + CORESIGHT_EVENT_ATTR(_pref##_num##_suff, _config)
> > +
> > +#define CORESIGHT_EVENT_ATTR_4(_pref, _suff, _config) \
> > + CORESIGHT_EVENT_ATTR_4_INNER(_pref, _0_, _suff, _config), \
> > + CORESIGHT_EVENT_ATTR_4_INNER(_pref, _1_, _suff, _config + 1), \
> > + CORESIGHT_EVENT_ATTR_4_INNER(_pref, _2_, _suff, _config + 2), \
> > + CORESIGHT_EVENT_ATTR_4_INNER(_pref, _3_, _suff, _config + 3)
> > +
> > +struct nv_pmu_impl {
> > + struct coresight_pmu_impl_ops ops;
> > + const char *name;
> > + u32 filter_mask;
> > + struct attribute **event_attr;
> > + struct attribute **format_attr;
> > +};
> > +
> > +static struct attribute *scf_pmu_event_attrs[] = {
> > + CORESIGHT_EVENT_ATTR(bus_cycles, 0x1d),
> > +
> > + CORESIGHT_EVENT_ATTR(scf_cache_allocate, 0xF0),
> > + CORESIGHT_EVENT_ATTR(scf_cache_refill, 0xF1),
> > + CORESIGHT_EVENT_ATTR(scf_cache, 0xF2),
> > + CORESIGHT_EVENT_ATTR(scf_cache_wb, 0xF3),
> > +
> > + CORESIGHT_EVENT_ATTR_4(socket, rd_data, 0x101),
> > + CORESIGHT_EVENT_ATTR_4(socket, dl_rsp, 0x105),
> > + CORESIGHT_EVENT_ATTR_4(socket, wb_data, 0x109),
> > + CORESIGHT_EVENT_ATTR_4(socket, ev_rsp, 0x10d),
> > + CORESIGHT_EVENT_ATTR_4(socket, prb_data, 0x111),
> > +
> > + CORESIGHT_EVENT_ATTR_4(socket, rd_outstanding, 0x115),
> > + CORESIGHT_EVENT_ATTR_4(socket, dl_outstanding, 0x119),
> > + CORESIGHT_EVENT_ATTR_4(socket, wb_outstanding, 0x11d),
> > + CORESIGHT_EVENT_ATTR_4(socket, wr_outstanding, 0x121),
> > + CORESIGHT_EVENT_ATTR_4(socket, ev_outstanding, 0x125),
> > + CORESIGHT_EVENT_ATTR_4(socket, prb_outstanding, 0x129),
> > +
> > + CORESIGHT_EVENT_ATTR_4(socket, rd_access, 0x12d),
> > + CORESIGHT_EVENT_ATTR_4(socket, dl_access, 0x131),
> > + CORESIGHT_EVENT_ATTR_4(socket, wb_access, 0x135),
> > + CORESIGHT_EVENT_ATTR_4(socket, wr_access, 0x139),
> > + CORESIGHT_EVENT_ATTR_4(socket, ev_access, 0x13d),
> > + CORESIGHT_EVENT_ATTR_4(socket, prb_access, 0x141),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_rd_data, 0x145),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_rd_access, 0x149),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wb_access, 0x14d),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_rd_outstanding, 0x151),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wr_outstanding, 0x155),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_rd_data, 0x159),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_rd_access, 0x15d),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wb_access, 0x161),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_rd_outstanding, 0x165),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wr_outstanding, 0x169),
> > +
> > + CORESIGHT_EVENT_ATTR(gmem_rd_data, 0x16d),
> > + CORESIGHT_EVENT_ATTR(gmem_rd_access, 0x16e),
> > + CORESIGHT_EVENT_ATTR(gmem_rd_outstanding, 0x16f),
> > + CORESIGHT_EVENT_ATTR(gmem_dl_rsp, 0x170),
> > + CORESIGHT_EVENT_ATTR(gmem_dl_access, 0x171),
> > + CORESIGHT_EVENT_ATTR(gmem_dl_outstanding, 0x172),
> > + CORESIGHT_EVENT_ATTR(gmem_wb_data, 0x173),
> > + CORESIGHT_EVENT_ATTR(gmem_wb_access, 0x174),
> > + CORESIGHT_EVENT_ATTR(gmem_wb_outstanding, 0x175),
> > + CORESIGHT_EVENT_ATTR(gmem_ev_rsp, 0x176),
> > + CORESIGHT_EVENT_ATTR(gmem_ev_access, 0x177),
> > + CORESIGHT_EVENT_ATTR(gmem_ev_outstanding, 0x178),
> > + CORESIGHT_EVENT_ATTR(gmem_wr_data, 0x179),
> > + CORESIGHT_EVENT_ATTR(gmem_wr_outstanding, 0x17a),
> > + CORESIGHT_EVENT_ATTR(gmem_wr_access, 0x17b),
> > +
> > + CORESIGHT_EVENT_ATTR_4(socket, wr_data, 0x17c),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wr_data, 0x180),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wb_data, 0x184),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wr_access, 0x188),
> > + CORESIGHT_EVENT_ATTR_4(ocu, gmem_wb_outstanding, 0x18c),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wr_data, 0x190),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wb_data, 0x194),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wr_access, 0x198),
> > + CORESIGHT_EVENT_ATTR_4(ocu, rem_wb_outstanding, 0x19c),
> > +
> > + CORESIGHT_EVENT_ATTR(gmem_wr_total_bytes, 0x1a0),
> > + CORESIGHT_EVENT_ATTR(remote_socket_wr_total_bytes, 0x1a1),
> > + CORESIGHT_EVENT_ATTR(remote_socket_rd_data, 0x1a2),
> > + CORESIGHT_EVENT_ATTR(remote_socket_rd_outstanding, 0x1a3),
> > + CORESIGHT_EVENT_ATTR(remote_socket_rd_access, 0x1a4),
> > +
> > + CORESIGHT_EVENT_ATTR(cmem_rd_data, 0x1a5),
> > + CORESIGHT_EVENT_ATTR(cmem_rd_access, 0x1a6),
> > + CORESIGHT_EVENT_ATTR(cmem_rd_outstanding, 0x1a7),
> > + CORESIGHT_EVENT_ATTR(cmem_dl_rsp, 0x1a8),
> > + CORESIGHT_EVENT_ATTR(cmem_dl_access, 0x1a9),
> > + CORESIGHT_EVENT_ATTR(cmem_dl_outstanding, 0x1aa),
> > + CORESIGHT_EVENT_ATTR(cmem_wb_data, 0x1ab),
> > + CORESIGHT_EVENT_ATTR(cmem_wb_access, 0x1ac),
> > + CORESIGHT_EVENT_ATTR(cmem_wb_outstanding, 0x1ad),
> > + CORESIGHT_EVENT_ATTR(cmem_ev_rsp, 0x1ae),
> > + CORESIGHT_EVENT_ATTR(cmem_ev_access, 0x1af),
> > + CORESIGHT_EVENT_ATTR(cmem_ev_outstanding, 0x1b0),
> > + CORESIGHT_EVENT_ATTR(cmem_wr_data, 0x1b1),
> > + CORESIGHT_EVENT_ATTR(cmem_wr_outstanding, 0x1b2),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_rd_data, 0x1b3),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_rd_access, 0x1b7),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wb_access, 0x1bb),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_rd_outstanding, 0x1bf),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wr_outstanding, 0x1c3),
> > +
> > + CORESIGHT_EVENT_ATTR(ocu_prb_access, 0x1c7),
> > + CORESIGHT_EVENT_ATTR(ocu_prb_data, 0x1c8),
> > + CORESIGHT_EVENT_ATTR(ocu_prb_outstanding, 0x1c9),
> > +
> > + CORESIGHT_EVENT_ATTR(cmem_wr_access, 0x1ca),
> > +
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wr_access, 0x1cb),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wb_data, 0x1cf),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wr_data, 0x1d3),
> > + CORESIGHT_EVENT_ATTR_4(ocu, cmem_wb_outstanding, 0x1d7),
> > +
> > + CORESIGHT_EVENT_ATTR(cmem_wr_total_bytes, 0x1db),
> > +
> > + CORESIGHT_EVENT_ATTR(cycles,
> CORESIGHT_PMU_EVT_CYCLES_DEFAULT),
> > + NULL,
> > +};
> > +
> > +static struct attribute *mcf_pmu_event_attrs[] = {
> > + CORESIGHT_EVENT_ATTR(rd_bytes_loc, 0x0),
> > + CORESIGHT_EVENT_ATTR(rd_bytes_rem, 0x1),
> > + CORESIGHT_EVENT_ATTR(wr_bytes_loc, 0x2),
> > + CORESIGHT_EVENT_ATTR(wr_bytes_rem, 0x3),
> > + CORESIGHT_EVENT_ATTR(total_bytes_loc, 0x4),
> > + CORESIGHT_EVENT_ATTR(total_bytes_rem, 0x5),
> > + CORESIGHT_EVENT_ATTR(rd_req_loc, 0x6),
> > + CORESIGHT_EVENT_ATTR(rd_req_rem, 0x7),
> > + CORESIGHT_EVENT_ATTR(wr_req_loc, 0x8),
> > + CORESIGHT_EVENT_ATTR(wr_req_rem, 0x9),
> > + CORESIGHT_EVENT_ATTR(total_req_loc, 0xa),
> > + CORESIGHT_EVENT_ATTR(total_req_rem, 0xb),
> > + CORESIGHT_EVENT_ATTR(rd_cum_outs_loc, 0xc),
> > + CORESIGHT_EVENT_ATTR(rd_cum_outs_rem, 0xd),
> > + CORESIGHT_EVENT_ATTR(cycles,
> CORESIGHT_PMU_EVT_CYCLES_DEFAULT),
> > + NULL,
> > +};
> > +
> > +static struct attribute *scf_pmu_format_attrs[] = {
> > + CORESIGHT_FORMAT_EVENT_ATTR,
> > + NULL,
> > +};
> > +
> > +static struct attribute *mcf_pcie_pmu_format_attrs[] = {
> > + CORESIGHT_FORMAT_EVENT_ATTR,
> > + CORESIGHT_FORMAT_ATTR(root_port, "config1:0-9"),
> > + NULL,
> > +};
> > +
> > +static struct attribute *mcf_gpu_pmu_format_attrs[] = {
> > + CORESIGHT_FORMAT_EVENT_ATTR,
> > + CORESIGHT_FORMAT_ATTR(gpu, "config1:0-1"),
> > + NULL,
> > +};
> > +
> > +static struct attribute *mcf_nvlink_pmu_format_attrs[] = {
> > + CORESIGHT_FORMAT_EVENT_ATTR,
> > + CORESIGHT_FORMAT_ATTR(socket, "config1:0-3"),
> > + NULL,
> > +};
> > +
> > +static struct attribute **
> > +nv_coresight_pmu_get_event_attrs(const struct coresight_pmu
> *coresight_pmu)
> > +{
> > + const struct nv_pmu_impl *impl = to_nv_pmu_impl(coresight_pmu);
> > +
> > + return impl->event_attr;
> > +}
> > +
> > +static struct attribute **
> > +nv_coresight_pmu_get_format_attrs(const struct coresight_pmu
> *coresight_pmu)
> > +{
> > + const struct nv_pmu_impl *impl = to_nv_pmu_impl(coresight_pmu);
> > +
> > + return impl->format_attr;
> > +}
> > +
> > +static const char *
> > +nv_coresight_pmu_get_name(const struct coresight_pmu
> *coresight_pmu)
> > +{
> > + const struct nv_pmu_impl *impl = to_nv_pmu_impl(coresight_pmu);
> > +
> > + return impl->name;
> > +}
> > +
> > +static u32 nv_coresight_pmu_event_filter(const struct perf_event
> *event)
> > +{
> > + const struct nv_pmu_impl *impl =
> > + to_nv_pmu_impl(to_coresight_pmu(event->pmu));
> > + return event->attr.config1 & impl->filter_mask;
> > +}
> > +
> > +int nv_coresight_init_ops(struct coresight_pmu *coresight_pmu)
> > +{
> > + u32 product_id;
> > + struct device *dev;
> > + struct nv_pmu_impl *impl;
> > + static atomic_t pmu_idx = {0};
> > +
> > + dev = coresight_pmu->dev;
> > +
> > + impl = devm_kzalloc(dev, sizeof(struct nv_pmu_impl), GFP_KERNEL);
> > + if (!impl)
> > + return -ENOMEM;
> > +
> > + product_id = (coresight_pmu->impl.pmiidr >>
> PMIIDR_PRODUCTID_SHIFT) &
> > + PMIIDR_PRODUCTID_MASK;
> > +
> > + switch (product_id) {
> > + case 0x103:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL,
> > + "nvidia_mcf_pcie_pmu_%u",
> > + coresight_pmu->apmt_node->proc_affinity);
> > + impl->filter_mask = NV_MCF_PCIE_FILTER_ID_MASK;
> > + impl->event_attr = mcf_pmu_event_attrs;
> > + impl->format_attr = mcf_pcie_pmu_format_attrs;
> > + break;
> > + case 0x104:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL,
> > + "nvidia_mcf_gpuvir_pmu_%u",
> > + coresight_pmu->apmt_node->proc_affinity);
> > + impl->filter_mask = NV_MCF_GPU_FILTER_ID_MASK;
> > + impl->event_attr = mcf_pmu_event_attrs;
> > + impl->format_attr = mcf_gpu_pmu_format_attrs;
> > + break;
> > + case 0x105:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL,
> > + "nvidia_mcf_gpu_pmu_%u",
> > + coresight_pmu->apmt_node->proc_affinity);
> > + impl->filter_mask = NV_MCF_GPU_FILTER_ID_MASK;
> > + impl->event_attr = mcf_pmu_event_attrs;
> > + impl->format_attr = mcf_gpu_pmu_format_attrs;
> > + break;
> > + case 0x106:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL,
> > + "nvidia_mcf_nvlink_pmu_%u",
> > + coresight_pmu->apmt_node->proc_affinity);
> > + impl->filter_mask = NV_MCF_NVLINK_FILTER_ID_MASK;
> > + impl->event_attr = mcf_pmu_event_attrs;
> > + impl->format_attr = mcf_nvlink_pmu_format_attrs;
> > + break;
> > + case 0x2CF:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL, "nvidia_scf_pmu_%u",
> > + coresight_pmu->apmt_node->proc_affinity);
> > + impl->filter_mask = 0x0;
> > + impl->event_attr = scf_pmu_event_attrs;
> > + impl->format_attr = scf_pmu_format_attrs;
> > + break;
> > + default:
> > + impl->name =
> > + devm_kasprintf(dev, GFP_KERNEL, "nvidia_uncore_pmu_%u",
> > + atomic_fetch_inc(&pmu_idx));
> > + impl->filter_mask = CORESIGHT_FILTER_MASK;
> > + impl->event_attr =
> coresight_pmu_get_event_attrs(coresight_pmu);
> > + impl->format_attr =
> > + coresight_pmu_get_format_attrs(coresight_pmu);
>
> Couldn't we make the generic driver fall back to these routines if a
> "IP" pmu specific backend doesn't implement these callback ?
>
Yes, we can do that. I will add it on the next version.
Regards,
Besar
> Thanks
> Suzuki
