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powerpc/pseries/iommu: Cleanup ddw naming
When using a property refering to the availibily of dynamic dma windows call it ddw_avail not ddr_avail. dupe_ddw_if_already_created does not dupilcate anything, it only finds and reuses the windows we already created, so rename it to find_existing_ddw. Also, it does not need the pci device node, so remove that argument. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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c85667802b
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b73a635f34
@ -659,16 +659,16 @@ static void remove_ddw(struct device_node *np)
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{
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struct dynamic_dma_window_prop *dwp;
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struct property *win64;
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const u32 *ddr_avail;
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const u32 *ddw_avail;
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u64 liobn;
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int len, ret;
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ddr_avail = of_get_property(np, "ibm,ddw-applicable", &len);
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ddw_avail = of_get_property(np, "ibm,ddw-applicable", &len);
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win64 = of_find_property(np, DIRECT64_PROPNAME, NULL);
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if (!win64)
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return;
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if (!ddr_avail || len < 3 * sizeof(u32) || win64->length < sizeof(*dwp))
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if (!ddw_avail || len < 3 * sizeof(u32) || win64->length < sizeof(*dwp))
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goto delprop;
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dwp = win64->value;
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@ -684,15 +684,15 @@ static void remove_ddw(struct device_node *np)
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pr_debug("%s successfully cleared tces in window.\n",
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np->full_name);
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ret = rtas_call(ddr_avail[2], 1, 1, NULL, liobn);
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ret = rtas_call(ddw_avail[2], 1, 1, NULL, liobn);
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if (ret)
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pr_warning("%s: failed to remove direct window: rtas returned "
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"%d to ibm,remove-pe-dma-window(%x) %llx\n",
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np->full_name, ret, ddr_avail[2], liobn);
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np->full_name, ret, ddw_avail[2], liobn);
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else
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pr_debug("%s: successfully removed direct window: rtas returned "
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"%d to ibm,remove-pe-dma-window(%x) %llx\n",
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np->full_name, ret, ddr_avail[2], liobn);
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np->full_name, ret, ddw_avail[2], liobn);
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delprop:
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ret = prom_remove_property(np, win64);
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@ -701,16 +701,12 @@ delprop:
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np->full_name, ret);
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}
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static u64 dupe_ddw_if_already_created(struct pci_dev *dev, struct device_node *pdn)
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static u64 find_existing_ddw(struct device_node *pdn)
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{
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struct device_node *dn;
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struct pci_dn *pcidn;
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struct direct_window *window;
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const struct dynamic_dma_window_prop *direct64;
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u64 dma_addr = 0;
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dn = pci_device_to_OF_node(dev);
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pcidn = PCI_DN(dn);
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spin_lock(&direct_window_list_lock);
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/* check if we already created a window and dupe that config if so */
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list_for_each_entry(window, &direct_window_list, list) {
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@ -758,7 +754,7 @@ static int find_existing_ddw_windows(void)
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}
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machine_arch_initcall(pseries, find_existing_ddw_windows);
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static int query_ddw(struct pci_dev *dev, const u32 *ddr_avail,
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static int query_ddw(struct pci_dev *dev, const u32 *ddw_avail,
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struct ddw_query_response *query)
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{
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struct device_node *dn;
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@ -779,15 +775,15 @@ static int query_ddw(struct pci_dev *dev, const u32 *ddr_avail,
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if (pcidn->eeh_pe_config_addr)
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cfg_addr = pcidn->eeh_pe_config_addr;
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buid = pcidn->phb->buid;
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ret = rtas_call(ddr_avail[0], 3, 5, (u32 *)query,
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ret = rtas_call(ddw_avail[0], 3, 5, (u32 *)query,
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cfg_addr, BUID_HI(buid), BUID_LO(buid));
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dev_info(&dev->dev, "ibm,query-pe-dma-windows(%x) %x %x %x"
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" returned %d\n", ddr_avail[0], cfg_addr, BUID_HI(buid),
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" returned %d\n", ddw_avail[0], cfg_addr, BUID_HI(buid),
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BUID_LO(buid), ret);
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return ret;
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}
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static int create_ddw(struct pci_dev *dev, const u32 *ddr_avail,
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static int create_ddw(struct pci_dev *dev, const u32 *ddw_avail,
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struct ddw_create_response *create, int page_shift,
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int window_shift)
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{
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@ -812,12 +808,12 @@ static int create_ddw(struct pci_dev *dev, const u32 *ddr_avail,
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do {
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/* extra outputs are LIOBN and dma-addr (hi, lo) */
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ret = rtas_call(ddr_avail[1], 5, 4, (u32 *)create, cfg_addr,
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ret = rtas_call(ddw_avail[1], 5, 4, (u32 *)create, cfg_addr,
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BUID_HI(buid), BUID_LO(buid), page_shift, window_shift);
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} while (rtas_busy_delay(ret));
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dev_info(&dev->dev,
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"ibm,create-pe-dma-window(%x) %x %x %x %x %x returned %d "
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"(liobn = 0x%x starting addr = %x %x)\n", ddr_avail[1],
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"(liobn = 0x%x starting addr = %x %x)\n", ddw_avail[1],
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cfg_addr, BUID_HI(buid), BUID_LO(buid), page_shift,
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window_shift, ret, create->liobn, create->addr_hi, create->addr_lo);
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@ -843,14 +839,14 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn)
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int page_shift;
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u64 dma_addr, max_addr;
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struct device_node *dn;
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const u32 *uninitialized_var(ddr_avail);
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const u32 *uninitialized_var(ddw_avail);
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struct direct_window *window;
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struct property *win64;
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struct dynamic_dma_window_prop *ddwprop;
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mutex_lock(&direct_window_init_mutex);
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dma_addr = dupe_ddw_if_already_created(dev, pdn);
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dma_addr = find_existing_ddw(pdn);
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if (dma_addr != 0)
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goto out_unlock;
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@ -862,8 +858,8 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn)
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* for the given node in that order.
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* the property is actually in the parent, not the PE
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*/
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ddr_avail = of_get_property(pdn, "ibm,ddw-applicable", &len);
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if (!ddr_avail || len < 3 * sizeof(u32))
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ddw_avail = of_get_property(pdn, "ibm,ddw-applicable", &len);
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if (!ddw_avail || len < 3 * sizeof(u32))
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goto out_unlock;
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/*
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@ -873,7 +869,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn)
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* of page sizes: supported and supported for migrate-dma.
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*/
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dn = pci_device_to_OF_node(dev);
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ret = query_ddw(dev, ddr_avail, &query);
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ret = query_ddw(dev, ddw_avail, &query);
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if (ret != 0)
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goto out_unlock;
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@ -922,7 +918,7 @@ static u64 enable_ddw(struct pci_dev *dev, struct device_node *pdn)
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goto out_free_prop;
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}
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ret = create_ddw(dev, ddr_avail, &create, page_shift, len);
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ret = create_ddw(dev, ddw_avail, &create, page_shift, len);
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if (ret != 0)
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goto out_free_prop;
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