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iommu/vt-d: trace: Extend map_sg trace event 

Current map_sg stores trace message in a coarse manner. This
extends it so that more detailed messages could be traced.

The map_sg trace message looks like:

map_sg: dev=0000:00:17.0 [1/9] dev_addr=0xf8f90000 phys_addr=0x158051000 size=4096
map_sg: dev=0000:00:17.0 [2/9] dev_addr=0xf8f91000 phys_addr=0x15a858000 size=4096
map_sg: dev=0000:00:17.0 [3/9] dev_addr=0xf8f92000 phys_addr=0x15aa13000 size=4096
map_sg: dev=0000:00:17.0 [4/9] dev_addr=0xf8f93000 phys_addr=0x1570f1000 size=8192
map_sg: dev=0000:00:17.0 [5/9] dev_addr=0xf8f95000 phys_addr=0x15c6d0000 size=4096
map_sg: dev=0000:00:17.0 [6/9] dev_addr=0xf8f96000 phys_addr=0x157194000 size=4096
map_sg: dev=0000:00:17.0 [7/9] dev_addr=0xf8f97000 phys_addr=0x169552000 size=4096
map_sg: dev=0000:00:17.0 [8/9] dev_addr=0xf8f98000 phys_addr=0x169dde000 size=4096
map_sg: dev=0000:00:17.0 [9/9] dev_addr=0xf8f99000 phys_addr=0x148351000 size=4096

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
alistair/sensors
Lu Baolu 2020-01-02 08:18:11 +08:00 committed by Joerg Roedel
parent 034d473109
commit 984d03adc9
2 changed files with 47 additions and 8 deletions
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7
drivers/iommu/intel-iommu.c
View File

@ -3776,8 +3776,8 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
return 0;
}
trace_map_sg(dev, iova_pfn << PAGE_SHIFT,
sg_phys(sglist), size << VTD_PAGE_SHIFT);
for_each_sg(sglist, sg, nelems, i)
trace_map_sg(dev, i + 1, nelems, sg);
return nelems;
}
@ -3989,6 +3989,9 @@ bounce_map_sg(struct device *dev, struct scatterlist *sglist, int nelems,
sg_dma_len(sg) = sg->length;
}
for_each_sg(sglist, sg, nelems, i)
trace_bounce_map_sg(dev, i + 1, nelems, sg);
return nelems;
out_unmap:

48
include/trace/events/intel_iommu.h
View File

@ -49,12 +49,6 @@ DEFINE_EVENT(dma_map, map_single,
TP_ARGS(dev, dev_addr, phys_addr, size)
);
DEFINE_EVENT(dma_map, map_sg,
TP_PROTO(struct device *dev, dma_addr_t dev_addr, phys_addr_t phys_addr,
size_t size),
TP_ARGS(dev, dev_addr, phys_addr, size)
);
DEFINE_EVENT(dma_map, bounce_map_single,
TP_PROTO(struct device *dev, dma_addr_t dev_addr, phys_addr_t phys_addr,
size_t size),
@ -99,6 +93,48 @@ DEFINE_EVENT(dma_unmap, bounce_unmap_single,
TP_ARGS(dev, dev_addr, size)
);
DECLARE_EVENT_CLASS(dma_map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg),
TP_STRUCT__entry(
__string(dev_name, dev_name(dev))
__field(dma_addr_t, dev_addr)
__field(phys_addr_t, phys_addr)
__field(size_t, size)
__field(int, index)
__field(int, total)
),
TP_fast_assign(
__assign_str(dev_name, dev_name(dev));
__entry->dev_addr = sg->dma_address;
__entry->phys_addr = sg_phys(sg);
__entry->size = sg->dma_length;
__entry->index = index;
__entry->total = total;
),
TP_printk("dev=%s [%d/%d] dev_addr=0x%llx phys_addr=0x%llx size=%zu",
__get_str(dev_name), __entry->index, __entry->total,
(unsigned long long)__entry->dev_addr,
(unsigned long long)__entry->phys_addr,
__entry->size)
);
DEFINE_EVENT(dma_map_sg, map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg)
);
DEFINE_EVENT(dma_map_sg, bounce_map_sg,
TP_PROTO(struct device *dev, int index, int total,
struct scatterlist *sg),
TP_ARGS(dev, index, total, sg)
);
#endif /* _TRACE_INTEL_IOMMU_H */
/* This part must be outside protection */