Skip to content

Revert "drivers: Add ACPI support for thead-c900-aclint-sswi" #144

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
liuhj2023 wants to merge 1 commit into
base: OLK-6.6
Choose a base branch
from
+0 −175
Open

Revert "drivers: Add ACPI support for thead-c900-aclint-sswi" #144

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
175 changes: 0 additions & 175 deletions drivers/irqchip/irq-thead-c900-aclint-sswi.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,6 @@
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/string_choices.h>
Expand Down Expand Up @@ -175,177 +174,3 @@ static int __init thead_aclint_sswi_early_probe(struct device_node *node,
return thead_aclint_sswi_probe(&node->fwnode);
}
IRQCHIP_DECLARE(thead_aclint_sswi, "thead,c900-aclint-sswi", thead_aclint_sswi_early_probe);

#ifdef CONFIG_ACPI

static struct fwnode_handle *sswi_acpi_fwnode;

static int __init sswi_get_parent_hartid(struct fwnode_handle *fwnode,
u32 index, unsigned long *hartid)
{
struct of_phandle_args parent;
int rc;

if (!is_of_node(fwnode)) {
if (hartid)
*hartid = acpi_rintc_index_to_hartid(index);

if (!hartid || (*hartid == INVALID_HARTID))
return -EINVAL;

return 0;
}

rc = of_irq_parse_one(to_of_node(fwnode), index, &parent);
if (rc)
return rc;

if (parent.args[0] != RV_IRQ_SOFT)
return -ENOTSUPP;

return riscv_of_parent_hartid(parent.np, hartid);
}

static int __init sswi_get_mmio_resource(struct fwnode_handle *fwnode,
u32 index, struct resource *res)
{
if (!is_of_node(fwnode))
return acpi_rintc_get_imsic_mmio_info(index, res);

return of_address_to_resource(to_of_node(fwnode), index, res);
}

static int __init sswi_early_probe(struct fwnode_handle *fwnode)
{
struct irq_domain *domain;
int virq;

/* Find parent domain and register chained handler */
domain = irq_find_matching_fwnode(riscv_get_intc_hwnode(), DOMAIN_BUS_ANY);
if (!domain) {
pr_err("%pfwP: Failed to find INTC domain\n", fwnode);
return -ENOENT;
}

sswi_ipi_virq = irq_create_mapping(domain, RV_IRQ_SOFT);
if (!sswi_ipi_virq) {
pr_err("%pfwP: Failed to create ACLINT SSWI IRQ mapping\n", fwnode);
return -ENOENT;
}

/* Create IPI multiplexing */
virq = ipi_mux_create(BITS_PER_BYTE, thead_aclint_sswi_ipi_send);
if (virq <= 0)
return virq < 0 ? virq : -ENOMEM;

/* Set vIRQ range */
riscv_ipi_set_virq_range(virq, BITS_PER_BYTE, true);

/* Announce that SSWI is providing IPIs */
pr_info("%pfwP: providing IPIs\n", fwnode);

/* Setup chained handler to the parent domain interrupt */
irq_set_chained_handler(sswi_ipi_virq, thead_aclint_sswi_ipi_handle);

cpuhp_setup_state(CPUHP_AP_IRQ_THEAD_ACLINT_SSWI_STARTING,
"irqchip/thead-aclint-sswi:starting",
thead_aclint_sswi_starting_cpu,
thead_aclint_sswi_dying_cpu);

return 0;
}

static int __init thead_aclint_sswi_early_acpi_init(union acpi_subtable_headers *header,
const unsigned long end)
{
unsigned long hartid;
struct resource *res;
int rc, cpu;
u32 i, nr_parent_irqs;
void __iomem *reg;

nr_parent_irqs = 0;

/* If it is T-HEAD CPU, check whether SSWI is enabled */
if (riscv_cached_mvendorid(0) == THEAD_VENDOR_ID &&
!(csr_read(THEAD_C9XX_CSR_SXSTATUS) & THEAD_C9XX_SXSTATUS_CLINTEE))
return -ENOTSUPP;

sswi_acpi_fwnode = irq_domain_alloc_named_fwnode("ACLINT-SSWI");
if (!sswi_acpi_fwnode) {
pr_err("unable to allocate SSWI FW node\n");
return -ENOMEM;
}

/* Find number of parent interrupts */
while (!sswi_get_parent_hartid(sswi_acpi_fwnode, nr_parent_irqs, &hartid))
(nr_parent_irqs)++;
if (!nr_parent_irqs) {
pr_err("%pfwP: no parent irqs available\n", sswi_acpi_fwnode);
return -EINVAL;
}

/* Allocate MMIO resource array */
res = kmalloc(sizeof(struct resource), GFP_KERNEL);
if (!res) {
pr_err("unable to allocate MMIO resource\n");
return -ENOMEM;
}

/* Find MMIO register base address */
rc = sswi_get_mmio_resource(sswi_acpi_fwnode, 0, res);
if (rc) {
pr_warn("%pfwP: hart ID for parent irq0 not found\n", sswi_acpi_fwnode);
return -EINVAL;
}

reg = ioremap(res->start, resource_size(res));
if (!reg) {
rc = -EBUSY;
pr_err("%pfwP: ioremap failed\n", sswi_acpi_fwnode);
goto ioremap_fail;
}

/* Configure handlers for target CPUs */
for (i = 0; i < nr_parent_irqs; i++) {
rc = sswi_get_parent_hartid(sswi_acpi_fwnode, i, &hartid);
if (rc) {
pr_warn("%pfwP: hart ID for parent irq%d not found\n", sswi_acpi_fwnode, i);
continue;
}

cpu = riscv_hartid_to_cpuid(hartid);
if (cpu < 0) {
pr_warn("%pfwP: invalid cpuid for parent irq%d\n", sswi_acpi_fwnode, i);
continue;
}

per_cpu(sswi_cpu_regs, cpu) = reg + i * THEAD_ACLINT_xSWI_REGISTER_SIZE;
}

/* If mulitple SSWI devices are present, do not register irq again */
if (sswi_ipi_virq)
return 0;

/* Do early setup of IPIs */
rc = sswi_early_probe(sswi_acpi_fwnode);
if (rc) {
irq_domain_free_fwnode(sswi_acpi_fwnode);
sswi_acpi_fwnode = NULL;
goto probe_fail;
}

return 0;

probe_fail:
iounmap(reg);
irq_domain_free_fwnode(sswi_acpi_fwnode);
sswi_acpi_fwnode = NULL;
ioremap_fail:
kfree(res);
return rc;
}

IRQCHIP_ACPI_DECLARE(thead_aclint_sswi, ACPI_MADT_TYPE_IMSIC, NULL,
1, thead_aclint_sswi_early_acpi_init);
#endif
Loading