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Commit 99f12257 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

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: default avatarCédric Le Goater <clg@kaod.org>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 59fc2724

arch/powerpc/sysdev/xive/common.c

+10 −1
Original line number Diff line number Diff line
@@ -203,6 +203,15 @@ static notrace u8 xive_esb_read(struct xive_irq_data *xd, u32 offset) 
	return (u8)val;

}



static void xive_esb_write(struct xive_irq_data *xd, u32 offset, u64 data)

{

	/* Handle HW errata */

	if (xd->flags & XIVE_IRQ_FLAG_SHIFT_BUG)

		offset |= offset << 4;



	out_be64(xd->eoi_mmio + offset, data);

}



#ifdef CONFIG_XMON

static notrace void xive_dump_eq(const char *name, struct xive_q *q)

{
@@ -297,7 +306,7 @@ void xive_do_source_eoi(u32 hw_irq, struct xive_irq_data *xd) 
{

	/* If the XIVE supports the new "store EOI facility, use it */

	if (xd->flags & XIVE_IRQ_FLAG_STORE_EOI)

		out_be64(xd->eoi_mmio + XIVE_ESB_STORE_EOI, 0);

		xive_esb_write(xd, XIVE_ESB_STORE_EOI, 0);

	else if (hw_irq && xd->flags & XIVE_IRQ_FLAG_EOI_FW) {

		/*

		 * The FW told us to call it. This happens for some