On 2016/8/11 18:06, Tomasz Nowicki wrote:
> In order to add ACPI support we need to isolate ACPI&DT common code and
> move DT logic to corresponding functions. To achieve this we are using
> firmware agnostic handle which can be unpacked to either DT or ACPI node.
>
> No functional changes other than a very minor one:
> 1. Terminate its_init call with -ENODEV for non-DT case which allows
> to remove hack from its-gic-v3.c.
> 2. Fix ITS base register address type (from 'unsigned long' to 'phys_addr_t'),
> as a bonus we get nice string formatting.
> 3. Since there is only one of ITS parent domain convert it to static global
> variable and drop the parameter from its_probe_one. Users can refer to it
> in more convenient way then.
[...]
> -static int __init its_probe(struct device_node *node,
> - struct irq_domain *parent)
> +static int __init its_probe_one(struct resource *res,
> + struct fwnode_handle *handle, int numa_node)
> {
> - struct resource res;
> struct its_node *its;
> void __iomem *its_base;
> u32 val;
> u64 baser, tmp;
> int err;
>
> - err = of_address_to_resource(node, 0, &res);
> - if (err) {
> - pr_warn("%s: no regs?\n", node->full_name);
> - return -ENXIO;
> - }
> -
> - its_base = ioremap(res.start, resource_size(&res));
> + its_base = ioremap(res->start, resource_size(res));
> if (!its_base) {
> - pr_warn("%s: unable to map registers\n", node->full_name);
> + pr_warn("ITS@%pa: Unable to map ITS registers\n", &res->start);
> return -ENOMEM;
> }
>
> val = readl_relaxed(its_base + GITS_PIDR2) & GIC_PIDR2_ARCH_MASK;
> if (val != 0x30 && val != 0x40) {
> - pr_warn("%s: no ITS detected, giving up\n", node->full_name);
> + pr_warn("ITS@%pa: No ITS detected, giving up\n", &res->start);
> err = -ENODEV;
> goto out_unmap;
> }
>
> err = its_force_quiescent(its_base);
> if (err) {
> - pr_warn("%s: failed to quiesce, giving up\n",
> - node->full_name);
> + pr_warn("ITS@%pa: Failed to quiesce, giving up\n", &res->start);
> goto out_unmap;
> }
>
> - pr_info("ITS: %s\n", node->full_name);
> + pr_info("ITS@%pa\n", &res->start);
^^
When I was testing this patch set I found message printed as below:
[ 0.000000] ITS@0x00000000c6000000
[ 0.000000] ITS@0x00000000c6000000: allocated 524288 Devices @27dc400000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x00000000c6000000: allocated 2048 Virtual CPUs @27dc820000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000000c6000000: allocated 512 Interrupt Collections @27dc80f000 (flat, esz 8, psz 4K, shr 1)
Seems this print is redundant, can we remove it?
Thanks
Hanjun
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