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I have a pcie board with a segment of memory which is mapped to system address space. The memory controller can accept long burst read or write request. In the host program, when I use for loop to read or write the memory, will the host generate burst pcie read/write requests to my board automatically? If not, how the host will issue long burst requests?

regards

Xiang Chao

Chao Xiang
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No, the host can not generate burst PCIe read/write requests to the board.

And it is not good practice to read device memory with for loop. Because the non-posted operations, such as read PCIe memory and R/W configuration space, is quite slow.

Bus mastering DMA will be the solution.

samuel
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