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powerpc/xive: introduce xive_esb_write()
Some source support MMIO stores on the ESB page to perform EOI. Let's introduce a specific routine for this case even if this should be the only use of it. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -203,6 +203,15 @@ static notrace u8 xive_esb_read(struct xive_irq_data *xd, u32 offset)
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return (u8)val;
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return (u8)val;
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}
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}
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static void xive_esb_write(struct xive_irq_data *xd, u32 offset, u64 data)
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{
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/* Handle HW errata */
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if (xd->flags & XIVE_IRQ_FLAG_SHIFT_BUG)
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offset |= offset << 4;
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out_be64(xd->eoi_mmio + offset, data);
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}
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#ifdef CONFIG_XMON
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#ifdef CONFIG_XMON
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static notrace void xive_dump_eq(const char *name, struct xive_q *q)
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static notrace void xive_dump_eq(const char *name, struct xive_q *q)
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{
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{
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@ -297,7 +306,7 @@ void xive_do_source_eoi(u32 hw_irq, struct xive_irq_data *xd)
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{
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{
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/* If the XIVE supports the new "store EOI facility, use it */
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/* If the XIVE supports the new "store EOI facility, use it */
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if (xd->flags & XIVE_IRQ_FLAG_STORE_EOI)
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if (xd->flags & XIVE_IRQ_FLAG_STORE_EOI)
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out_be64(xd->eoi_mmio + XIVE_ESB_STORE_EOI, 0);
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xive_esb_write(xd, XIVE_ESB_STORE_EOI, 0);
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else if (hw_irq && xd->flags & XIVE_IRQ_FLAG_EOI_FW) {
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else if (hw_irq && xd->flags & XIVE_IRQ_FLAG_EOI_FW) {
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/*
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/*
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* The FW told us to call it. This happens for some
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* The FW told us to call it. This happens for some
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