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Commit b7d6bf4f authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Michael Ellerman
Browse files

powerpc/pseries/pci: Remove obsolete SW invalidate 



That was used by some old IBM internal bringup tools and is
no longer relevant.

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent fb111334

arch/powerpc/platforms/pseries/iommu.c

+1 −52
Original line number Original line Diff line number Diff line
@@ -120,35 +120,6 @@ static void iommu_pseries_free_group(struct iommu_table_group *table_group, 
	kfree(table_group);

	kfree(table_group);

}

}





static void tce_invalidate_pSeries_sw(struct iommu_table *tbl,

				      __be64 *startp, __be64 *endp)

{

	u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index;

	unsigned long start, end, inc;



	start = __pa(startp);

	end = __pa(endp);

	inc = L1_CACHE_BYTES; /* invalidate a cacheline of TCEs at a time */



	/* If this is non-zero, change the format.  We shift the

	 * address and or in the magic from the device tree. */

	if (tbl->it_busno) {

		start <<= 12;

		end <<= 12;

		inc <<= 12;

		start |= tbl->it_busno;

		end |= tbl->it_busno;

	}



	end |= inc - 1; /* round up end to be different than start */



	mb(); /* Make sure TCEs in memory are written */

	while (start <= end) {

		out_be64(invalidate, start);

		start += inc;

	}

}



static int tce_build_pSeries(struct iommu_table *tbl, long index,

static int tce_build_pSeries(struct iommu_table *tbl, long index,

			      long npages, unsigned long uaddr,

			      long npages, unsigned long uaddr,

			      enum dma_data_direction direction,

			      enum dma_data_direction direction,
@@ -173,9 +144,6 @@ static int tce_build_pSeries(struct iommu_table *tbl, long index, 
		uaddr += TCE_PAGE_SIZE;

		uaddr += TCE_PAGE_SIZE;

		tcep++;

		tcep++;

	}

	}



	if (tbl->it_type & TCE_PCI_SWINV_CREATE)

		tce_invalidate_pSeries_sw(tbl, tces, tcep - 1);

	return 0;

	return 0;

}

}
@@ -188,9 +156,6 @@ static void tce_free_pSeries(struct iommu_table *tbl, long index, long npages) 




	while (npages--)

	while (npages--)

		*(tcep++) = 0;

		*(tcep++) = 0;



	if (tbl->it_type & TCE_PCI_SWINV_FREE)

		tce_invalidate_pSeries_sw(tbl, tces, tcep - 1);

}

}





static unsigned long tce_get_pseries(struct iommu_table *tbl, long index)

static unsigned long tce_get_pseries(struct iommu_table *tbl, long index)
@@ -537,7 +502,7 @@ static void iommu_table_setparms(struct pci_controller *phb, 
				 struct iommu_table *tbl)

				 struct iommu_table *tbl)

{

{

	struct device_node *node;

	struct device_node *node;

	const unsigned long *basep, *sw_inval;

	const unsigned long *basep;

	const u32 *sizep;

	const u32 *sizep;





	node = phb->dn;

	node = phb->dn;
@@ -575,22 +540,6 @@ static void iommu_table_setparms(struct pci_controller *phb, 
	tbl->it_index = 0;

	tbl->it_index = 0;

	tbl->it_blocksize = 16;

	tbl->it_blocksize = 16;

	tbl->it_type = TCE_PCI;

	tbl->it_type = TCE_PCI;



	sw_inval = of_get_property(node, "linux,tce-sw-invalidate-info", NULL);

	if (sw_inval) {

		/*

		 * This property contains information on how to

		 * invalidate the TCE entry.  The first property is

		 * the base MMIO address used to invalidate entries.

		 * The second property tells us the format of the TCE

		 * invalidate (whether it needs to be shifted) and

		 * some magic routing info to add to our invalidate

		 * command.

		 */

		tbl->it_index = (unsigned long) ioremap(sw_inval[0], 8);

		tbl->it_busno = sw_inval[1]; /* overload this with magic */

		tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE;

	}

}

}





/*

/*