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author | Marc Zyngier <marc.zyngier@arm.com> | 2014-11-24 14:35:10 +0000 |
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committer | Jason Cooper <jason@lakedaemon.net> | 2014-11-26 15:55:12 +0000 |
commit | f5c1434c217fd72ac0d24d3142d09e49a3d4e72e (patch) | |
tree | aecaafc7fe456cd46d2b6764ca7fcb870a3f4de6 /drivers/irqchip | |
parent | 443acc4f37f61e343f3577dc28d7e7fd8b499465 (diff) | |
download | linux-stable-f5c1434c217fd72ac0d24d3142d09e49a3d4e72e.tar.gz linux-stable-f5c1434c217fd72ac0d24d3142d09e49a3d4e72e.tar.bz2 linux-stable-f5c1434c217fd72ac0d24d3142d09e49a3d4e72e.zip |
irqchip: GICv3: rework redistributor structure
The basic GICv3 driver has almost no use for the redistributor
(other than the basic per-CPU interrupts), but the ITS needs
a lot more from them.
As such, rework the set of data structures. The behaviour of the
GICv3 driver is otherwise unaffected.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1416839720-18400-4-git-send-email-marc.zyngier@arm.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 73 |
1 files changed, 44 insertions, 29 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 4cb355aff3c6..43e57da0d80e 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -34,20 +34,25 @@ #include "irq-gic-common.h" #include "irqchip.h" +struct redist_region { + void __iomem *redist_base; + phys_addr_t phys_base; +}; + struct gic_chip_data { void __iomem *dist_base; - void __iomem **redist_base; - void __iomem * __percpu *rdist; + struct redist_region *redist_regions; + struct rdists rdists; struct irq_domain *domain; u64 redist_stride; - u32 redist_regions; + u32 nr_redist_regions; unsigned int irq_nr; }; static struct gic_chip_data gic_data __read_mostly; -#define gic_data_rdist() (this_cpu_ptr(gic_data.rdist)) -#define gic_data_rdist_rd_base() (*gic_data_rdist()) +#define gic_data_rdist() (this_cpu_ptr(gic_data.rdists.rdist)) +#define gic_data_rdist_rd_base() (gic_data_rdist()->rd_base) #define gic_data_rdist_sgi_base() (gic_data_rdist_rd_base() + SZ_64K) /* Our default, arbitrary priority value. Linux only uses one anyway. */ @@ -333,8 +338,8 @@ static int gic_populate_rdist(void) MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 | MPIDR_AFFINITY_LEVEL(mpidr, 0)); - for (i = 0; i < gic_data.redist_regions; i++) { - void __iomem *ptr = gic_data.redist_base[i]; + for (i = 0; i < gic_data.nr_redist_regions; i++) { + void __iomem *ptr = gic_data.redist_regions[i].redist_base; u32 reg; reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK; @@ -347,10 +352,13 @@ static int gic_populate_rdist(void) do { typer = readq_relaxed(ptr + GICR_TYPER); if ((typer >> 32) == aff) { + u64 offset = ptr - gic_data.redist_regions[i].redist_base; gic_data_rdist_rd_base() = ptr; - pr_info("CPU%d: found redistributor %llx @%p\n", + gic_data_rdist()->phys_base = gic_data.redist_regions[i].phys_base + offset; + pr_info("CPU%d: found redistributor %llx region %d:%pa\n", smp_processor_id(), - (unsigned long long)mpidr, ptr); + (unsigned long long)mpidr, + i, &gic_data_rdist()->phys_base); return 0; } @@ -673,9 +681,10 @@ static const struct irq_domain_ops gic_irq_domain_ops = { static int __init gic_of_init(struct device_node *node, struct device_node *parent) { void __iomem *dist_base; - void __iomem **redist_base; + struct redist_region *rdist_regs; u64 redist_stride; - u32 redist_regions; + u32 nr_redist_regions; + u32 typer; u32 reg; int gic_irqs; int err; @@ -696,48 +705,54 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare goto out_unmap_dist; } - if (of_property_read_u32(node, "#redistributor-regions", &redist_regions)) - redist_regions = 1; + if (of_property_read_u32(node, "#redistributor-regions", &nr_redist_regions)) + nr_redist_regions = 1; - redist_base = kzalloc(sizeof(*redist_base) * redist_regions, GFP_KERNEL); - if (!redist_base) { + rdist_regs = kzalloc(sizeof(*rdist_regs) * nr_redist_regions, GFP_KERNEL); + if (!rdist_regs) { err = -ENOMEM; goto out_unmap_dist; } - for (i = 0; i < redist_regions; i++) { - redist_base[i] = of_iomap(node, 1 + i); - if (!redist_base[i]) { + for (i = 0; i < nr_redist_regions; i++) { + struct resource res; + int ret; + + ret = of_address_to_resource(node, 1 + i, &res); + rdist_regs[i].redist_base = of_iomap(node, 1 + i); + if (ret || !rdist_regs[i].redist_base) { pr_err("%s: couldn't map region %d\n", node->full_name, i); err = -ENODEV; goto out_unmap_rdist; } + rdist_regs[i].phys_base = res.start; } if (of_property_read_u64(node, "redistributor-stride", &redist_stride)) redist_stride = 0; gic_data.dist_base = dist_base; - gic_data.redist_base = redist_base; - gic_data.redist_regions = redist_regions; + gic_data.redist_regions = rdist_regs; + gic_data.nr_redist_regions = nr_redist_regions; gic_data.redist_stride = redist_stride; /* * Find out how many interrupts are supported. * The GIC only supports up to 1020 interrupt sources (SGI+PPI+SPI) */ - gic_irqs = readl_relaxed(gic_data.dist_base + GICD_TYPER) & 0x1f; - gic_irqs = (gic_irqs + 1) * 32; + typer = readl_relaxed(gic_data.dist_base + GICD_TYPER); + gic_data.rdists.id_bits = GICD_TYPER_ID_BITS(typer); + gic_irqs = GICD_TYPER_IRQS(typer); if (gic_irqs > 1020) gic_irqs = 1020; gic_data.irq_nr = gic_irqs; gic_data.domain = irq_domain_add_tree(node, &gic_irq_domain_ops, &gic_data); - gic_data.rdist = alloc_percpu(typeof(*gic_data.rdist)); + gic_data.rdists.rdist = alloc_percpu(typeof(*gic_data.rdists.rdist)); - if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdist)) { + if (WARN_ON(!gic_data.domain) || WARN_ON(!gic_data.rdists.rdist)) { err = -ENOMEM; goto out_free; } @@ -754,12 +769,12 @@ static int __init gic_of_init(struct device_node *node, struct device_node *pare out_free: if (gic_data.domain) irq_domain_remove(gic_data.domain); - free_percpu(gic_data.rdist); + free_percpu(gic_data.rdists.rdist); out_unmap_rdist: - for (i = 0; i < redist_regions; i++) - if (redist_base[i]) - iounmap(redist_base[i]); - kfree(redist_base); + for (i = 0; i < nr_redist_regions; i++) + if (rdist_regs[i].redist_base) + iounmap(rdist_regs[i].redist_base); + kfree(rdist_regs); out_unmap_dist: iounmap(dist_base); return err; |