Date: Tue, 3 May 2016 17:05:58 +0000 (UTC) From: "Conrad E. Meyer" <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r298987 - head/sys/dev/ioat Message-ID: <201605031705.u43H5wUb011828@repo.freebsd.org>
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Author: cem Date: Tue May 3 17:05:58 2016 New Revision: 298987 URL: https://svnweb.freebsd.org/changeset/base/298987 Log: ioat(4): Limit descriptor allocation to low 40 bits The IOAT engine can only address the low 40 bits (1 TB) of physmem via the 'next descriptor' pointer. Restrict acceptable range given to bus_dma_tag_create to match. Sponsored by: EMC / Isilon Storage Division Modified: head/sys/dev/ioat/ioat.c Modified: head/sys/dev/ioat/ioat.c ============================================================================== --- head/sys/dev/ioat/ioat.c Tue May 3 16:37:09 2016 (r298986) +++ head/sys/dev/ioat/ioat.c Tue May 3 17:05:58 2016 (r298987) @@ -52,6 +52,9 @@ __FBSDID("$FreeBSD$"); #include "ioat_hw.h" #include "ioat_internal.h" +#ifndef BUS_SPACE_MAXADDR_40BIT +#define BUS_SPACE_MAXADDR_40BIT 0xFFFFFFFFFFULL +#endif #define IOAT_INTR_TIMO (hz / 10) #define IOAT_REFLK (&ioat->submit_lock) @@ -454,7 +457,7 @@ ioat3_attach(device_t device) num_descriptors = 1 << ioat->ring_size_order; bus_dma_tag_create(bus_get_dma_tag(ioat->device), 0x40, 0x0, - BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, + BUS_SPACE_MAXADDR_40BIT, BUS_SPACE_MAXADDR, NULL, NULL, sizeof(struct ioat_dma_hw_descriptor), 1, sizeof(struct ioat_dma_hw_descriptor), 0, NULL, NULL, &ioat->hw_desc_tag);
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