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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-15 15:07:35 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-15 15:07:35 (GMT) |
commit | 5f2434a66dfa4701b81b79a78eaf9c32da0f8839 (patch) | |
tree | 8c38f1fb0d0fbcd15e496df89be00ad8c4918a43 /arch/powerpc/sysdev/mpic_msi.c | |
parent | 278429cff8809958d25415ba0ed32b59866ab1a8 (diff) | |
parent | 6dc6472581f693b5fc95aebedf67b4960fb85cf0 (diff) | |
download | linux-fsl-qoriq-5f2434a66dfa4701b81b79a78eaf9c32da0f8839.tar.xz |
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (158 commits)
powerpc: Fix CHRP PCI config access for indirect_pci
powerpc/chrp: Fix detection of Python PCI host bridge on IBM CHRPs
powerpc: Fix 32-bit SMP boot on CHRP
powerpc: Fix link errors on 32-bit machines using legacy DMA
powerpc/pci: Improve detection of unassigned bridge resources
hvc_console: Fix free_irq in spinlocked section
powerpc: Get USE_STRICT_MM_TYPECHECKS working again
powerpc: Reflect the used arguments in machine_init() prototype
powerpc: Fix DMA offset for non-coherent DMA
powerpc: fix fsl_upm nand driver modular build
powerpc/83xx: add NAND support for the MPC8360E-RDK boards
powerpc: FPGA support for GE Fanuc SBC610
i2c: MPC8349E-mITX Power Management and GPIO expander driver
powerpc: reserve two DMA channels for audio in MPC8610 HPCD device tree
powerpc: document the "fsl,ssi-dma-channel" compatible property
powerpc: disable CHRP and PMAC support in various defconfigs
OF: add fsl,mcu-mpc8349emitx to the exception list
powerpc/83xx: add DS1374 RTC support for the MPC837xE-MDS boards
powerpc: remove support for bootmem-allocated memory for the DIU driver
powerpc: remove non-dependent load fsl_booke PTE_64BIT
...
Diffstat (limited to 'arch/powerpc/sysdev/mpic_msi.c')
-rw-r--r-- | arch/powerpc/sysdev/mpic_msi.c | 123 |
1 files changed, 18 insertions, 105 deletions
diff --git a/arch/powerpc/sysdev/mpic_msi.c b/arch/powerpc/sysdev/mpic_msi.c index de3e5e8..1d44eee 100644 --- a/arch/powerpc/sysdev/mpic_msi.c +++ b/arch/powerpc/sysdev/mpic_msi.c @@ -15,59 +15,17 @@ #include <asm/prom.h> #include <asm/hw_irq.h> #include <asm/ppc-pci.h> +#include <asm/msi_bitmap.h> #include <sysdev/mpic.h> -static void __mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq) -{ - pr_debug("mpic: reserving hwirq 0x%lx\n", hwirq); - bitmap_allocate_region(mpic->hwirq_bitmap, hwirq, 0); -} - void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq) { - unsigned long flags; - /* The mpic calls this even when there is no allocator setup */ - if (!mpic->hwirq_bitmap) + if (!mpic->msi_bitmap.bitmap) return; - spin_lock_irqsave(&mpic->bitmap_lock, flags); - __mpic_msi_reserve_hwirq(mpic, hwirq); - spin_unlock_irqrestore(&mpic->bitmap_lock, flags); -} - -irq_hw_number_t mpic_msi_alloc_hwirqs(struct mpic *mpic, int num) -{ - unsigned long flags; - int offset, order = get_count_order(num); - - spin_lock_irqsave(&mpic->bitmap_lock, flags); - /* - * This is fast, but stricter than we need. We might want to add - * a fallback routine which does a linear search with no alignment. - */ - offset = bitmap_find_free_region(mpic->hwirq_bitmap, mpic->irq_count, - order); - spin_unlock_irqrestore(&mpic->bitmap_lock, flags); - - pr_debug("mpic: allocated 0x%x (2^%d) at offset 0x%x\n", - num, order, offset); - - return offset; -} - -void mpic_msi_free_hwirqs(struct mpic *mpic, int offset, int num) -{ - unsigned long flags; - int order = get_count_order(num); - - pr_debug("mpic: freeing 0x%x (2^%d) at offset 0x%x\n", - num, order, offset); - - spin_lock_irqsave(&mpic->bitmap_lock, flags); - bitmap_release_region(mpic->hwirq_bitmap, offset, order); - spin_unlock_irqrestore(&mpic->bitmap_lock, flags); + msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, hwirq); } #ifdef CONFIG_MPIC_U3_HT_IRQS @@ -83,13 +41,13 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic) /* Reserve source numbers we know are reserved in the HW */ for (i = 0; i < 8; i++) - __mpic_msi_reserve_hwirq(mpic, i); + msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i); for (i = 42; i < 46; i++) - __mpic_msi_reserve_hwirq(mpic, i); + msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i); for (i = 100; i < 105; i++) - __mpic_msi_reserve_hwirq(mpic, i); + msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, i); np = NULL; while ((np = of_find_all_nodes(np))) { @@ -99,7 +57,7 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic) while (of_irq_map_one(np, index++, &oirq) == 0) { ops->xlate(mpic->irqhost, NULL, oirq.specifier, oirq.size, &hwirq, &flags); - __mpic_msi_reserve_hwirq(mpic, hwirq); + msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, hwirq); } } @@ -112,70 +70,25 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic) } #endif -static int mpic_msi_reserve_dt_hwirqs(struct mpic *mpic) -{ - int i, len; - const u32 *p; - - p = of_get_property(mpic->irqhost->of_node, - "msi-available-ranges", &len); - if (!p) { - pr_debug("mpic: no msi-available-ranges property found on %s\n", - mpic->irqhost->of_node->full_name); - return -ENODEV; - } - - if (len % 8 != 0) { - printk(KERN_WARNING "mpic: Malformed msi-available-ranges " - "property on %s\n", mpic->irqhost->of_node->full_name); - return -EINVAL; - } - - bitmap_allocate_region(mpic->hwirq_bitmap, 0, - get_count_order(mpic->irq_count)); - - /* Format is: (<u32 start> <u32 count>)+ */ - len /= sizeof(u32); - for (i = 0; i < len / 2; i++, p += 2) - mpic_msi_free_hwirqs(mpic, *p, *(p + 1)); - - return 0; -} - int mpic_msi_init_allocator(struct mpic *mpic) { - int rc, size; - - BUG_ON(mpic->hwirq_bitmap); - spin_lock_init(&mpic->bitmap_lock); + int rc; - size = BITS_TO_LONGS(mpic->irq_count) * sizeof(long); - pr_debug("mpic: allocator bitmap size is 0x%x bytes\n", size); + rc = msi_bitmap_alloc(&mpic->msi_bitmap, mpic->irq_count, + mpic->irqhost->of_node); + if (rc) + return rc; - mpic->hwirq_bitmap = alloc_maybe_bootmem(size, GFP_KERNEL); - - if (!mpic->hwirq_bitmap) { - pr_debug("mpic: ENOMEM allocating allocator bitmap!\n"); - return -ENOMEM; - } - - memset(mpic->hwirq_bitmap, 0, size); - - rc = mpic_msi_reserve_dt_hwirqs(mpic); - if (rc) { + rc = msi_bitmap_reserve_dt_hwirqs(&mpic->msi_bitmap); + if (rc > 0) { if (mpic->flags & MPIC_U3_HT_IRQS) rc = mpic_msi_reserve_u3_hwirqs(mpic); - if (rc) - goto out_free; + if (rc) { + msi_bitmap_free(&mpic->msi_bitmap); + return rc; + } } return 0; - - out_free: - if (mem_init_done) - kfree(mpic->hwirq_bitmap); - - mpic->hwirq_bitmap = NULL; - return rc; } |