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Commit 376ec376 authored by Dan Williams's avatar Dan Williams
Browse files

ioat2: clarify ring size limits 



With the addition of ioat_max_alloc_order it is not clear what the
maximum allocation order is, so document that in the modinfo.  Also take
an opportunity to kill a stray semicolon.

Signed-off-by: default avatarMaciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 6c910a78

drivers/dma/ioat/dma_v2.c

+4 −3
Original line number Diff line number Diff line
@@ -42,18 +42,19 @@ 
int ioat_ring_alloc_order = 8;

module_param(ioat_ring_alloc_order, int, 0644);

MODULE_PARM_DESC(ioat_ring_alloc_order,

		 "ioat2+: allocate 2^n descriptors per channel (default: n=8)");

		 "ioat2+: allocate 2^n descriptors per channel"

		 " (default: 8 max: 16)");

static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER;

module_param(ioat_ring_max_alloc_order, int, 0644);

MODULE_PARM_DESC(ioat_ring_max_alloc_order,

		 "ioat2+: upper limit for dynamic ring resizing (default: n=16)");

		 "ioat2+: upper limit for ring size (default: 16)");



void __ioat2_issue_pending(struct ioat2_dma_chan *ioat)

{

	void * __iomem reg_base = ioat->base.reg_base;



	ioat->pending = 0;

	ioat->dmacount += ioat2_ring_pending(ioat);;

	ioat->dmacount += ioat2_ring_pending(ioat);

	ioat->issued = ioat->head;

	/* make descriptor updates globally visible before notifying channel */

	wmb();