Hi Hans,
Thanks for the review.
On Wed, 2022-06-29 at 12:00 +0200, Hans de Goede wrote:
> Hi,
>
> On 6/27/22 23:50, Srinivas Pandruvada wrote:
> >
[...]
> >
> > +struct isst_if_pkg_info {
> > + struct pci_dev *pci_dev[2];
>
> This and (continued below) ...
>
Didn't understand the comment.
> > +};
> > +
> > static struct isst_if_cpu_info *isst_cpu_info;
> > +static struct isst_if_pkg_info *isst_pkg_info;
> > +
> > #define ISST_MAX_PCI_DOMAINS 8
> >
> > static struct pci_dev *_isst_if_get_pci_dev(int cpu, int bus_no,
> > int dev, int fn)
> > {
> > + int pkg_id = topology_physical_package_id(cpu);
> > struct pci_dev *matched_pci_dev = NULL;
> > struct pci_dev *pci_dev = NULL;
> > int no_matches = 0;
> > @@ -324,6 +331,8 @@ static struct pci_dev *_isst_if_get_pci_dev(int
> > cpu, int bus_no, int dev, int fn
> > }
> >
> > if (node == isst_cpu_info[cpu].numa_node) {
> > + isst_pkg_info[pkg_id].pci_dev[bus_no] =
> > _pci_dev;
> > +
>
> This and ...
>
Please explain the comment.
> > pci_dev = _pci_dev;
> > break;
> > }
> > @@ -342,6 +351,9 @@ static struct pci_dev *_isst_if_get_pci_dev(int
> > cpu, int bus_no, int dev, int fn
> > if (!pci_dev && no_matches == 1)
> > pci_dev = matched_pci_dev;
> >
> > + if (!pci_dev)
> > + pci_dev = isst_pkg_info[pkg_id].pci_dev[bus_no];
> > +
>
> This assumes that bus_no is never > 1, is this assumption enforced
> somewhere?
>
Yes. That is checked at the beginning of function
if (bus_no < 0 || bus_no > 1 || cpu < 0 || cpu >= nr_cpu_ids ||
cpu >= num_possible_cpus())
return NULL;
> Also maybe make the 2 in:
>
> > +struct isst_if_pkg_info {
> > + struct pci_dev *pci_dev[2];
>
> a #define ?
I will.
Thanks,
Srinivas
>
> Regards,
>
> Hans
>
>
> > return pci_dev;
> > }
> >
> > @@ -417,10 +429,19 @@ static int isst_if_cpu_info_init(void)
> > if (!isst_cpu_info)
> > return -ENOMEM;
> >
> > + isst_pkg_info = kcalloc(topology_max_packages(),
> > + sizeof(*isst_pkg_info),
> > + GFP_KERNEL);
> > + if (!isst_pkg_info) {
> > + kfree(isst_cpu_info);
> > + return -ENOMEM;
> > + }
> > +
> > ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
> > "platform/x86/isst-if:online",
> > isst_if_cpu_online, NULL);
> > if (ret < 0) {
> > + kfree(isst_pkg_info);
> > kfree(isst_cpu_info);
> > return ret;
> > }
> > @@ -433,6 +454,7 @@ static int isst_if_cpu_info_init(void)
> > static void isst_if_cpu_info_exit(void)
> > {
> > cpuhp_remove_state(isst_if_online_id);
> > + kfree(isst_pkg_info);
> > kfree(isst_cpu_info);
> > };
> >
>
