Merge branch 'remotes/lorenzo/pci/rcar'

  - Fix rcar OB window programming (Andrew Murray)

  - Add rcar suspend/resume support (Kazufumi Ikeda)

  - Add r8a77961 to DT binding (Yoshihiro Shimoda)

  - Rename pcie-rcar.c to pcie-rcar-host.c to make room for endpoint mode
    (Lad Prabhakar)

  - Move shareable code to pcie-rcar.c (Lad Prabhakar)

  - Correct PCIEPAMR mask calculation for "size < 128" (Lad Prabhakar)

  - Add endpoint support for multiple outbound memory windows (Lad
    Prabhakar)

  - Add R-Car PCIe endpoint driver and DT bindings (Lad Prabhakar)

* remotes/lorenzo/pci/rcar:
  MAINTAINERS: Add file patterns for rcar PCI device tree bindings
  PCI: rcar: Add endpoint mode support
  dt-bindings: PCI: rcar: Add bindings for R-Car PCIe endpoint controller
  PCI: endpoint: Add support to handle multiple base for mapping outbound memory
  PCI: endpoint: Pass page size as argument to pci_epc_mem_init()
  PCI: rcar: Fix calculating mask for PCIEPAMR register
  PCI: rcar: Move shareable code to a common file
  PCI: rcar: Rename pcie-rcar.c to pcie-rcar-host.c
  dt-bindings: pci: rcar: add r8a77961 support
  PCI: rcar: Add suspend/resume
  PCI: rcar: Fix incorrect programming of OB windows

1 files changed, 144 insertions, 60 deletions

diff --git a/drivers/pci/endpoint/pci-epc-mem.c b/drivers/pci/endpoint/pci-epc-mem.c
index abfac1109a13..80c46f3a4590 100644
--- a/drivers/pci/endpoint/pci-epc-mem.c
+++ b/drivers/pci/endpoint/pci-epc-mem.c
@@ -23,7 +23,7 @@
 static int pci_epc_mem_get_order(struct pci_epc_mem *mem, size_t size)
 {
 	int order;
-	unsigned int page_shift = ilog2(mem->page_size);
+	unsigned int page_shift = ilog2(mem->window.page_size);
 
 	size--;
 	size >>= page_shift;
@@ -36,62 +36,97 @@ static int pci_epc_mem_get_order(struct pci_epc_mem *mem, size_t size)
 }
 
 /**
- * __pci_epc_mem_init() - initialize the pci_epc_mem structure
+ * pci_epc_multi_mem_init() - initialize the pci_epc_mem structure
  * @epc: the EPC device that invoked pci_epc_mem_init
- * @phys_base: the physical address of the base
- * @size: the size of the address space
- * @page_size: size of each page
+ * @windows: pointer to windows supported by the device
+ * @num_windows: number of windows device supports
  *
  * Invoke to initialize the pci_epc_mem structure used by the
  * endpoint functions to allocate mapped PCI address.
  */
-int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size,
-		       size_t page_size)
+int pci_epc_multi_mem_init(struct pci_epc *epc,
+			   struct pci_epc_mem_window *windows,
+			   unsigned int num_windows)
 {
-	int ret;
-	struct pci_epc_mem *mem;
-	unsigned long *bitmap;
+	struct pci_epc_mem *mem = NULL;
+	unsigned long *bitmap = NULL;
 	unsigned int page_shift;
-	int pages;
+	size_t page_size;
 	int bitmap_size;
+	int pages;
+	int ret;
+	int i;
 
-	if (page_size < PAGE_SIZE)
-		page_size = PAGE_SIZE;
+	epc->num_windows = 0;
 
-	page_shift = ilog2(page_size);
-	pages = size >> page_shift;
-	bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
+	if (!windows || !num_windows)
+		return -EINVAL;
 
-	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
-	if (!mem) {
-		ret = -ENOMEM;
-		goto err;
-	}
+	epc->windows = kcalloc(num_windows, sizeof(*epc->windows), GFP_KERNEL);
+	if (!epc->windows)
+		return -ENOMEM;
 
-	bitmap = kzalloc(bitmap_size, GFP_KERNEL);
-	if (!bitmap) {
-		ret = -ENOMEM;
-		goto err_mem;
-	}
+	for (i = 0; i < num_windows; i++) {
+		page_size = windows[i].page_size;
+		if (page_size < PAGE_SIZE)
+			page_size = PAGE_SIZE;
+		page_shift = ilog2(page_size);
+		pages = windows[i].size >> page_shift;
+		bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
 
-	mem->bitmap = bitmap;
-	mem->phys_base = phys_base;
-	mem->page_size = page_size;
-	mem->pages = pages;
-	mem->size = size;
-	mutex_init(&mem->lock);
+		mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+		if (!mem) {
+			ret = -ENOMEM;
+			i--;
+			goto err_mem;
+		}
+
+		bitmap = kzalloc(bitmap_size, GFP_KERNEL);
+		if (!bitmap) {
+			ret = -ENOMEM;
+			kfree(mem);
+			i--;
+			goto err_mem;
+		}
+
+		mem->window.phys_base = windows[i].phys_base;
+		mem->window.size = windows[i].size;
+		mem->window.page_size = page_size;
+		mem->bitmap = bitmap;
+		mem->pages = pages;
+		mutex_init(&mem->lock);
+		epc->windows[i] = mem;
+	}
 
-	epc->mem = mem;
+	epc->mem = epc->windows[0];
+	epc->num_windows = num_windows;
 
 	return 0;
 
 err_mem:
-	kfree(mem);
+	for (; i >= 0; i--) {
+		mem = epc->windows[i];
+		kfree(mem->bitmap);
+		kfree(mem);
+	}
+	kfree(epc->windows);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pci_epc_multi_mem_init);
+
+int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t base,
+		     size_t size, size_t page_size)
+{
+	struct pci_epc_mem_window mem_window;
+
+	mem_window.phys_base = base;
+	mem_window.size = size;
+	mem_window.page_size = page_size;
 
-err:
-return ret;
+	return pci_epc_multi_mem_init(epc, &mem_window, 1);
 }
-EXPORT_SYMBOL_GPL(__pci_epc_mem_init);
+EXPORT_SYMBOL_GPL(pci_epc_mem_init);
 
 /**
  * pci_epc_mem_exit() - cleanup the pci_epc_mem structure
@@ -102,11 +137,22 @@ EXPORT_SYMBOL_GPL(__pci_epc_mem_init);
  */
 void pci_epc_mem_exit(struct pci_epc *epc)
 {
-	struct pci_epc_mem *mem = epc->mem;
+	struct pci_epc_mem *mem;
+	int i;
+
+	if (!epc->num_windows)
+		return;
 
+	for (i = 0; i < epc->num_windows; i++) {
+		mem = epc->windows[i];
+		kfree(mem->bitmap);
+		kfree(mem);
+	}
+	kfree(epc->windows);
+
+	epc->windows = NULL;
 	epc->mem = NULL;
-	kfree(mem->bitmap);
-	kfree(mem);
+	epc->num_windows = 0;
 }
 EXPORT_SYMBOL_GPL(pci_epc_mem_exit);
 
@@ -122,31 +168,60 @@ EXPORT_SYMBOL_GPL(pci_epc_mem_exit);
 void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
 				     phys_addr_t *phys_addr, size_t size)
 {
-	int pageno;
 	void __iomem *virt_addr = NULL;
-	struct pci_epc_mem *mem = epc->mem;
-	unsigned int page_shift = ilog2(mem->page_size);
+	struct pci_epc_mem *mem;
+	unsigned int page_shift;
+	size_t align_size;
+	int pageno;
 	int order;
+	int i;
 
-	size = ALIGN(size, mem->page_size);
-	order = pci_epc_mem_get_order(mem, size);
-
-	mutex_lock(&mem->lock);
-	pageno = bitmap_find_free_region(mem->bitmap, mem->pages, order);
-	if (pageno < 0)
-		goto ret;
+	for (i = 0; i < epc->num_windows; i++) {
+		mem = epc->windows[i];
+		mutex_lock(&mem->lock);
+		align_size = ALIGN(size, mem->window.page_size);
+		order = pci_epc_mem_get_order(mem, align_size);
 
-	*phys_addr = mem->phys_base + ((phys_addr_t)pageno << page_shift);
-	virt_addr = ioremap(*phys_addr, size);
-	if (!virt_addr)
-		bitmap_release_region(mem->bitmap, pageno, order);
+		pageno = bitmap_find_free_region(mem->bitmap, mem->pages,
+						 order);
+		if (pageno >= 0) {
+			page_shift = ilog2(mem->window.page_size);
+			*phys_addr = mem->window.phys_base +
+				((phys_addr_t)pageno << page_shift);
+			virt_addr = ioremap(*phys_addr, align_size);
+			if (!virt_addr) {
+				bitmap_release_region(mem->bitmap,
+						      pageno, order);
+				mutex_unlock(&mem->lock);
+				continue;
+			}
+			mutex_unlock(&mem->lock);
+			return virt_addr;
+		}
+		mutex_unlock(&mem->lock);
+	}
 
-ret:
-	mutex_unlock(&mem->lock);
 	return virt_addr;
 }
 EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
 
+static struct pci_epc_mem *pci_epc_get_matching_window(struct pci_epc *epc,
+						       phys_addr_t phys_addr)
+{
+	struct pci_epc_mem *mem;
+	int i;
+
+	for (i = 0; i < epc->num_windows; i++) {
+		mem = epc->windows[i];
+
+		if (phys_addr >= mem->window.phys_base &&
+		    phys_addr < (mem->window.phys_base + mem->window.size))
+			return mem;
+	}
+
+	return NULL;
+}
+
 /**
  * pci_epc_mem_free_addr() - free the allocated memory address
  * @epc: the EPC device on which memory was allocated
@@ -159,14 +234,23 @@ EXPORT_SYMBOL_GPL(pci_epc_mem_alloc_addr);
 void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
 			   void __iomem *virt_addr, size_t size)
 {
+	struct pci_epc_mem *mem;
+	unsigned int page_shift;
+	size_t page_size;
 	int pageno;
-	struct pci_epc_mem *mem = epc->mem;
-	unsigned int page_shift = ilog2(mem->page_size);
 	int order;
 
+	mem = pci_epc_get_matching_window(epc, phys_addr);
+	if (!mem) {
+		pr_err("failed to get matching window\n");
+		return;
+	}
+
+	page_size = mem->window.page_size;
+	page_shift = ilog2(page_size);
 	iounmap(virt_addr);
-	pageno = (phys_addr - mem->phys_base) >> page_shift;
-	size = ALIGN(size, mem->page_size);
+	pageno = (phys_addr - mem->window.phys_base) >> page_shift;
+	size = ALIGN(size, page_size);
 	order = pci_epc_mem_get_order(mem, size);
 	mutex_lock(&mem->lock);
 	bitmap_release_region(mem->bitmap, pageno, order);