[RFC PATCH V3 05/17] ppc/pnv: user macro to define the TCE size
Wei Yang
weiyang at linux.vnet.ibm.com
Mon Jun 23 16:31:45 EST 2014
On Mon, Jun 23, 2014 at 03:12:33PM +1000, Gavin Shan wrote:
>On Tue, Jun 10, 2014 at 09:56:27AM +0800, Wei Yang wrote:
>>During the initialization of the TVT/TCE, it uses digits to specify the TCE IO
>>Page Size, TCE Table Size, TCE Entry Size, etc.
>>
>>This patch replaces those digits with macros, which will be more meaningful and
>>easy to read.
>>
>>Signed-off-by: Wei Yang <weiyang at linux.vnet.ibm.com>
>
>It looks conflicting with "dynamic page size support" posted by Alexey:
>
>http://patchwork.ozlabs.org/patch/356718/
Ok, will did some change in next version.
>
>>---
>> arch/powerpc/include/asm/tce.h | 3 ++-
>> arch/powerpc/platforms/powernv/pci-ioda.c | 25 +++++++++++--------------
>> arch/powerpc/platforms/powernv/pci.c | 2 +-
>> arch/powerpc/platforms/powernv/pci.h | 5 +++++
>> 4 files changed, 19 insertions(+), 16 deletions(-)
>>
>>diff --git a/arch/powerpc/include/asm/tce.h b/arch/powerpc/include/asm/tce.h
>>index 743f36b..28a1d06 100644
>>--- a/arch/powerpc/include/asm/tce.h
>>+++ b/arch/powerpc/include/asm/tce.h
>>@@ -40,7 +40,8 @@
>> #define TCE_SHIFT 12
>> #define TCE_PAGE_SIZE (1 << TCE_SHIFT)
>>
>>-#define TCE_ENTRY_SIZE 8 /* each TCE is 64 bits */
>>+#define TCE_ENTRY_SHIFT 3
>>+#define TCE_ENTRY_SIZE (1 << TCE_ENTRY_SHIFT) /* each TCE is 64 bits */
>>
>> #define TCE_RPN_MASK 0xfffffffffful /* 40-bit RPN (4K pages) */
>> #define TCE_RPN_SHIFT 12
>>diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
>>index 8ae09cf..9715351 100644
>>--- a/arch/powerpc/platforms/powernv/pci-ioda.c
>>+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
>>@@ -820,9 +820,6 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>> int64_t rc;
>> void *addr;
>>
>>- /* 256M DMA window, 4K TCE pages, 8 bytes TCE */
>>-#define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8)
>>-
>> /* XXX FIXME: Handle 64-bit only DMA devices */
>> /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
>> /* XXX FIXME: Allocate multi-level tables on PHB3 */
>>@@ -834,7 +831,7 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>> /* Grab a 32-bit TCE table */
>> pe->tce32_seg = base;
>> pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n",
>>- (base << 28), ((base + segs) << 28) - 1);
>>+ (base << PNV_TCE32_SEG_SHIFT), ((base + segs) << PNV_TCE32_SEG_SHIFT) - 1);
>>
>> /* XXX Currently, we allocate one big contiguous table for the
>> * TCEs. We only really need one chunk per 256M of TCE space
>>@@ -842,21 +839,21 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>> * requires some added smarts with our get/put_tce implementation
>> */
>> tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
>>- get_order(TCE32_TABLE_SIZE * segs));
>>+ get_order(PNV_TCE32_TAB_SIZE * segs));
>> if (!tce_mem) {
>> pe_err(pe, " Failed to allocate a 32-bit TCE memory\n");
>> goto fail;
>> }
>> addr = page_address(tce_mem);
>>- memset(addr, 0, TCE32_TABLE_SIZE * segs);
>>+ memset(addr, 0, PNV_TCE32_TAB_SIZE * segs);
>>
>> /* Configure HW */
>> for (i = 0; i < segs; i++) {
>> rc = opal_pci_map_pe_dma_window(phb->opal_id,
>> pe->pe_number,
>> base + i, 1,
>>- __pa(addr) + TCE32_TABLE_SIZE * i,
>>- TCE32_TABLE_SIZE, 0x1000);
>>+ __pa(addr) + PNV_TCE32_TAB_SIZE * i,
>>+ PNV_TCE32_TAB_SIZE, TCE_PAGE_SIZE);
>> if (rc) {
>> pe_err(pe, " Failed to configure 32-bit TCE table,"
>> " err %ld\n", rc);
>>@@ -866,8 +863,8 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>>
>> /* Setup linux iommu table */
>> tbl = &pe->tce32_table;
>>- pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs,
>>- base << 28);
>>+ pnv_pci_setup_iommu_table(tbl, addr, PNV_TCE32_TAB_SIZE * segs,
>>+ base << PNV_TCE32_SEG_SHIFT);
>>
>> /* OPAL variant of P7IOC SW invalidated TCEs */
>> swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
>>@@ -898,7 +895,7 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
>> if (pe->tce32_seg >= 0)
>> pe->tce32_seg = -1;
>> if (tce_mem)
>>- __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs));
>>+ __free_pages(tce_mem, get_order(PNV_TCE32_TAB_SIZE * segs));
>> }
>>
>> static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable)
>>@@ -968,7 +965,7 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
>> /* The PE will reserve all possible 32-bits space */
>> pe->tce32_seg = 0;
>> end = (1 << ilog2(phb->ioda.m32_pci_base));
>>- tce_table_size = (end / 0x1000) * 8;
>>+ tce_table_size = (end / TCE_PAGE_SIZE) * TCE_ENTRY_SIZE;
>> pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n",
>> end);
>>
>>@@ -988,7 +985,7 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb,
>> */
>> rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
>> pe->pe_number << 1, 1, __pa(addr),
>>- tce_table_size, 0x1000);
>>+ tce_table_size, TCE_PAGE_SIZE);
>> if (rc) {
>> pe_err(pe, "Failed to configure 32-bit TCE table,"
>> " err %ld\n", rc);
>>@@ -1573,7 +1570,7 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
>> INIT_LIST_HEAD(&phb->ioda.pe_list);
>>
>> /* Calculate how many 32-bit TCE segments we have */
>>- phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28;
>>+ phb->ioda.tce32_count = phb->ioda.m32_pci_base >> PNV_TCE32_SEG_SHIFT;
>>
>> #if 0 /* We should really do that ... */
>> rc = opal_pci_set_phb_mem_window(opal->phb_id,
>>diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
>>index 8518817..687a068 100644
>>--- a/arch/powerpc/platforms/powernv/pci.c
>>+++ b/arch/powerpc/platforms/powernv/pci.c
>>@@ -597,7 +597,7 @@ void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
>> tbl->it_page_shift = IOMMU_PAGE_SHIFT_4K;
>> tbl->it_offset = dma_offset >> tbl->it_page_shift;
>> tbl->it_index = 0;
>>- tbl->it_size = tce_size >> 3;
>>+ tbl->it_size = tce_size >> TCE_ENTRY_SHIFT;
>> tbl->it_busno = 0;
>> tbl->it_type = TCE_PCI;
>> }
>>diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
>>index 3e5f5a1..90f6da4 100644
>>--- a/arch/powerpc/platforms/powernv/pci.h
>>+++ b/arch/powerpc/platforms/powernv/pci.h
>>@@ -227,4 +227,9 @@ extern void pnv_pci_init_ioda2_phb(struct device_node *np);
>> extern void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
>> __be64 *startp, __be64 *endp, bool rm);
>>
>>+#define PNV_TCE32_SEG_SHIFT 28
>>+#define PNV_TCE32_SEG_SIZE (1UL << PNV_TCE32_SEG_SHIFT)
>>+/* 256M DMA window, 4K TCE pages, 8 bytes TCE */
>>+#define PNV_TCE32_TAB_SIZE ((PNV_TCE32_SEG_SIZE / TCE_PAGE_SIZE) * TCE_ENTRY_SIZE)
>>+
>> #endif /* __POWERNV_PCI_H */
>
>Thanks,
>Gavin
--
Richard Yang
Help you, Help me
More information about the Linuxppc-dev
mailing list