Commit a28a2eff authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by Michael Ellerman
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powerpc/pseries/iommu: Print ibm,query-pe-dma-windows parameters 



PowerVM has a stricter policy about allocating TCEs for LPARs and
often there is not enough TCEs for 1:1 mapping, this adds the supported
numbers into dev_info() to help analyzing bugreports.

Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220601040117.1467710-1-aik@ozlabs.ru
parent 2d9206b2

arch/powerpc/platforms/pseries/iommu.c

+5 −3
Original line number Diff line number Diff line
@@ -1021,9 +1021,6 @@ static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail, 


	ret = rtas_call(ddw_avail[DDW_QUERY_PE_DMA_WIN], 3, out_sz, query_out,

			cfg_addr, BUID_HI(buid), BUID_LO(buid));

	dev_info(&dev->dev, "ibm,query-pe-dma-windows(%x) %x %x %x returned %d\n",

		 ddw_avail[DDW_QUERY_PE_DMA_WIN], cfg_addr, BUID_HI(buid),

		 BUID_LO(buid), ret);



	switch (out_sz) {

	case 5:
@@ -1041,6 +1038,11 @@ static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail, 
		break;

	}



	dev_info(&dev->dev, "ibm,query-pe-dma-windows(%x) %x %x %x returned %d, lb=%llx ps=%x wn=%d\n",

		 ddw_avail[DDW_QUERY_PE_DMA_WIN], cfg_addr, BUID_HI(buid),

		 BUID_LO(buid), ret, query->largest_available_block,

		 query->page_size, query->windows_available);



	return ret;

}