Merge branch 'pci/endpoint' into next

* pci/endpoint:
  tools: PCI: Add a missing option help line
  misc: pci_endpoint_test: Enable/Disable MSI using module param
  misc: pci_endpoint_test: Avoid using hard-coded BAR sizes
  misc: pci_endpoint_test: Add support to not enable MSI interrupts
  misc: pci_endpoint_test: Add support to provide aligned buffer addresses
  misc: pci_endpoint_test: Add support for PCI_ENDPOINT_TEST regs to be mapped to any BAR
  PCI: designware-ep: Do not disable BARs during initialization
  PCI: dra7xx: Reset all BARs during initialization
  PCI: dwc: designware: Provide page_size to pci_epc_mem
  PCI: endpoint: Remove the ->remove() callback
  PCI: endpoint: Add support to poll early for host commands
  PCI: endpoint: Add support to use _any_ BAR to map PCI_ENDPOINT_TEST regs
  PCI: endpoint: Do not reset *command* inadvertently
  PCI: endpoint: Add "volatile" to pci_epf_test_reg
  PCI: endpoint: Add support for configurable page size
  PCI: endpoint: Make ->remove() callback optional
  PCI: endpoint: Add an API to get matching "pci_epf_device_id"
  PCI: endpoint: Use of_dma_configure() to set initial DMA mask

drivers/misc/pci_endpoint_test.c

@@ -72,6 +72,11 @@ static DEFINE_IDA(pci_endpoint_test_ida);
 
 #define to_endpoint_test(priv) container_of((priv), struct pci_endpoint_test, \
 					    miscdev)
+
+static bool no_msi;
+module_param(no_msi, bool, 0444);
+MODULE_PARM_DESC(no_msi, "Disable MSI interrupt in pci_endpoint_test");
+
 enum pci_barno {
 	BAR_0,
 	BAR_1,
@@ -90,9 +95,15 @@ struct pci_endpoint_test {
 	/* mutex to protect the ioctls */
 	struct mutex	mutex;
 	struct miscdevice miscdev;
+	enum pci_barno test_reg_bar;
+	size_t alignment;
 };
 
-static int bar_size[] = { 4, 512, 1024, 16384, 131072, 1048576 };
+struct pci_endpoint_test_data {
+	enum pci_barno test_reg_bar;
+	size_t alignment;
+	bool no_msi;
+};
 
 static inline u32 pci_endpoint_test_readl(struct pci_endpoint_test *test,
 					  u32 offset)
@@ -141,11 +152,15 @@ static bool pci_endpoint_test_bar(struct pci_endpoint_test *test,
 	int j;
 	u32 val;
 	int size;
+	struct pci_dev *pdev = test->pdev;
 
 	if (!test->bar[barno])
 		return false;
 
-	size = bar_size[barno];
+	size = pci_resource_len(pdev, barno);
+
+	if (barno == test->test_reg_bar)
+		size = 0x4;
 
 	for (j = 0; j < size; j += 4)
 		pci_endpoint_test_bar_writel(test, barno, j, 0xA0A0A0A0);
@@ -202,16 +217,32 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
 	dma_addr_t dst_phys_addr;
 	struct pci_dev *pdev = test->pdev;
 	struct device *dev = &pdev->dev;
+	void *orig_src_addr;
+	dma_addr_t orig_src_phys_addr;
+	void *orig_dst_addr;
+	dma_addr_t orig_dst_phys_addr;
+	size_t offset;
+	size_t alignment = test->alignment;
 	u32 src_crc32;
 	u32 dst_crc32;
 
-	src_addr = dma_alloc_coherent(dev, size, &src_phys_addr, GFP_KERNEL);
-	if (!src_addr) {
+	orig_src_addr = dma_alloc_coherent(dev, size + alignment,
+					   &orig_src_phys_addr, GFP_KERNEL);
+	if (!orig_src_addr) {
 		dev_err(dev, "failed to allocate source buffer\n");
 		ret = false;
 		goto err;
 	}
 
+	if (alignment && !IS_ALIGNED(orig_src_phys_addr, alignment)) {
+		src_phys_addr = PTR_ALIGN(orig_src_phys_addr, alignment);
+		offset = src_phys_addr - orig_src_phys_addr;
+		src_addr = orig_src_addr + offset;
+	} else {
+		src_phys_addr = orig_src_phys_addr;
+		src_addr = orig_src_addr;
+	}
+
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_SRC_ADDR,
 				 lower_32_bits(src_phys_addr));
 
@@ -221,11 +252,21 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
 	get_random_bytes(src_addr, size);
 	src_crc32 = crc32_le(~0, src_addr, size);
 
-	dst_addr = dma_alloc_coherent(dev, size, &dst_phys_addr, GFP_KERNEL);
-	if (!dst_addr) {
+	orig_dst_addr = dma_alloc_coherent(dev, size + alignment,
+					   &orig_dst_phys_addr, GFP_KERNEL);
+	if (!orig_dst_addr) {
 		dev_err(dev, "failed to allocate destination address\n");
 		ret = false;
-		goto err_src_addr;
+		goto err_orig_src_addr;
+	}
+
+	if (alignment && !IS_ALIGNED(orig_dst_phys_addr, alignment)) {
+		dst_phys_addr = PTR_ALIGN(orig_dst_phys_addr, alignment);
+		offset = dst_phys_addr - orig_dst_phys_addr;
+		dst_addr = orig_dst_addr + offset;
+	} else {
+		dst_phys_addr = orig_dst_phys_addr;
+		dst_addr = orig_dst_addr;
 	}
 
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_DST_ADDR,
@@ -245,10 +286,12 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, size_t size)
 	if (dst_crc32 == src_crc32)
 		ret = true;
 
-	dma_free_coherent(dev, size, dst_addr, dst_phys_addr);
+	dma_free_coherent(dev, size + alignment, orig_dst_addr,
+			  orig_dst_phys_addr);
 
-err_src_addr:
-	dma_free_coherent(dev, size, src_addr, src_phys_addr);
+err_orig_src_addr:
+	dma_free_coherent(dev, size + alignment, orig_src_addr,
+			  orig_src_phys_addr);
 
 err:
 	return ret;
@@ -262,15 +305,29 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
 	dma_addr_t phys_addr;
 	struct pci_dev *pdev = test->pdev;
 	struct device *dev = &pdev->dev;
+	void *orig_addr;
+	dma_addr_t orig_phys_addr;
+	size_t offset;
+	size_t alignment = test->alignment;
 	u32 crc32;
 
-	addr = dma_alloc_coherent(dev, size, &phys_addr, GFP_KERNEL);
-	if (!addr) {
+	orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
+				       GFP_KERNEL);
+	if (!orig_addr) {
 		dev_err(dev, "failed to allocate address\n");
 		ret = false;
 		goto err;
 	}
 
+	if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
+		phys_addr =  PTR_ALIGN(orig_phys_addr, alignment);
+		offset = phys_addr - orig_phys_addr;
+		addr = orig_addr + offset;
+	} else {
+		phys_addr = orig_phys_addr;
+		addr = orig_addr;
+	}
+
 	get_random_bytes(addr, size);
 
 	crc32 = crc32_le(~0, addr, size);
@@ -293,7 +350,7 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, size_t size)
 	if (reg & STATUS_READ_SUCCESS)
 		ret = true;
 
-	dma_free_coherent(dev, size, addr, phys_addr);
+	dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
 
 err:
 	return ret;
@@ -306,15 +363,29 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
 	dma_addr_t phys_addr;
 	struct pci_dev *pdev = test->pdev;
 	struct device *dev = &pdev->dev;
+	void *orig_addr;
+	dma_addr_t orig_phys_addr;
+	size_t offset;
+	size_t alignment = test->alignment;
 	u32 crc32;
 
-	addr = dma_alloc_coherent(dev, size, &phys_addr, GFP_KERNEL);
-	if (!addr) {
+	orig_addr = dma_alloc_coherent(dev, size + alignment, &orig_phys_addr,
+				       GFP_KERNEL);
+	if (!orig_addr) {
 		dev_err(dev, "failed to allocate destination address\n");
 		ret = false;
 		goto err;
 	}
 
+	if (alignment && !IS_ALIGNED(orig_phys_addr, alignment)) {
+		phys_addr = PTR_ALIGN(orig_phys_addr, alignment);
+		offset = phys_addr - orig_phys_addr;
+		addr = orig_addr + offset;
+	} else {
+		phys_addr = orig_phys_addr;
+		addr = orig_addr;
+	}
+
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_LOWER_DST_ADDR,
 				 lower_32_bits(phys_addr));
 	pci_endpoint_test_writel(test, PCI_ENDPOINT_TEST_UPPER_DST_ADDR,
@@ -331,7 +402,7 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, size_t size)
 	if (crc32 == pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM))
 		ret = true;
 
-	dma_free_coherent(dev, size, addr, phys_addr);
+	dma_free_coherent(dev, size + alignment, orig_addr, orig_phys_addr);
 err:
 	return ret;
 }
@@ -383,13 +454,15 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 {
 	int i;
 	int err;
-	int irq;
+	int irq = 0;
 	int id;
 	char name[20];
 	enum pci_barno bar;
 	void __iomem *base;
 	struct device *dev = &pdev->dev;
 	struct pci_endpoint_test *test;
+	struct pci_endpoint_test_data *data;
+	enum pci_barno test_reg_bar = BAR_0;
 	struct miscdevice *misc_device;
 
 	if (pci_is_bridge(pdev))
@@ -399,7 +472,17 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 	if (!test)
 		return -ENOMEM;
 
+	test->test_reg_bar = 0;
+	test->alignment = 0;
 	test->pdev = pdev;
+
+	data = (struct pci_endpoint_test_data *)ent->driver_data;
+	if (data) {
+		test_reg_bar = data->test_reg_bar;
+		test->alignment = data->alignment;
+		no_msi = data->no_msi;
+	}
+
 	init_completion(&test->irq_raised);
 	mutex_init(&test->mutex);
 
@@ -417,9 +500,11 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 
 	pci_set_master(pdev);
 
-	irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI);
-	if (irq < 0)
-		dev_err(dev, "failed to get MSI interrupts\n");
+	if (!no_msi) {
+		irq = pci_alloc_irq_vectors(pdev, 1, 32, PCI_IRQ_MSI);
+		if (irq < 0)
+			dev_err(dev, "failed to get MSI interrupts\n");
+	}
 
 	err = devm_request_irq(dev, pdev->irq, pci_endpoint_test_irqhandler,
 			       IRQF_SHARED, DRV_MODULE_NAME, test);
@@ -441,14 +526,15 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
 		base = pci_ioremap_bar(pdev, bar);
 		if (!base) {
 			dev_err(dev, "failed to read BAR%d\n", bar);
-			WARN_ON(bar == BAR_0);
+			WARN_ON(bar == test_reg_bar);
 		}
 		test->bar[bar] = base;
 	}
 
-	test->base = test->bar[0];
+	test->base = test->bar[test_reg_bar];
 	if (!test->base) {
-		dev_err(dev, "Cannot perform PCI test without BAR0\n");
+		dev_err(dev, "Cannot perform PCI test without BAR%d\n",
+			test_reg_bar);
 		goto err_iounmap;
 	}
 

drivers/pci/dwc/pci-dra7xx.c

@@ -337,10 +337,23 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
+static void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
+{
+	u32 reg;
+
+	reg = PCI_BASE_ADDRESS_0 + (4 * bar);
+	dw_pcie_writel_dbi2(pci, reg, 0x0);
+	dw_pcie_writel_dbi(pci, reg, 0x0);
+}
+
 static void dra7xx_pcie_ep_init(struct dw_pcie_ep *ep)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
 	struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
+	enum pci_barno bar;
+
+	for (bar = BAR_0; bar <= BAR_5; bar++)
+		dw_pcie_ep_reset_bar(pci, bar);
 
 	dra7xx_pcie_enable_wrapper_interrupts(dra7xx);
 }

drivers/pci/dwc/pcie-designware-ep.c

@@ -283,7 +283,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 {
 	int ret;
 	void *addr;
-	enum pci_barno bar;
 	struct pci_epc *epc;
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
 	struct device *dev = pci->dev;
@@ -312,9 +311,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 		return -ENOMEM;
 	ep->outbound_addr = addr;
 
-	for (bar = BAR_0; bar <= BAR_5; bar++)
-		dw_pcie_ep_reset_bar(pci, bar);
-
 	if (ep->ops->ep_init)
 		ep->ops->ep_init(ep);
 
@@ -328,7 +324,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	if (ret < 0)
 		epc->max_functions = 1;
 
-	ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size);
+	ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
+				 ep->page_size);
 	if (ret < 0) {
 		dev_err(dev, "Failed to initialize address space\n");
 		return ret;

drivers/pci/dwc/pcie-designware.h

@@ -189,6 +189,7 @@ struct dw_pcie_ep {
 	struct dw_pcie_ep_ops	*ops;
 	phys_addr_t		phys_base;
 	size_t			addr_size;
+	size_t			page_size;
 	u8			bar_to_atu[6];
 	phys_addr_t		*outbound_addr;
 	unsigned long		ib_window_map;

drivers/pci/endpoint/functions/pci-epf-test.c

@@ -54,6 +54,8 @@ static struct workqueue_struct *kpcitest_workqueue;
 struct pci_epf_test {
 	void			*reg[6];
 	struct pci_epf		*epf;
+	enum pci_barno		test_reg_bar;
+	bool			linkup_notifier;
 	struct delayed_work	cmd_handler;
 };
 
@@ -74,7 +76,12 @@ static struct pci_epf_header test_header = {
 	.interrupt_pin	= PCI_INTERRUPT_INTA,
 };
 
-static int bar_size[] = { 512, 1024, 16384, 131072, 1048576 };
+struct pci_epf_test_data {
+	enum pci_barno	test_reg_bar;
+	bool		linkup_notifier;
+};
+
+static int bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 };
 
 static int pci_epf_test_copy(struct pci_epf_test *epf_test)
 {
@@ -86,7 +93,8 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
 	struct pci_epf *epf = epf_test->epf;
 	struct device *dev = &epf->dev;
 	struct pci_epc *epc = epf->epc;
-	struct pci_epf_test_reg *reg = epf_test->reg[0];
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
+	struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
 
 	src_addr = pci_epc_mem_alloc_addr(epc, &src_phys_addr, reg->size);
 	if (!src_addr) {
@@ -145,7 +153,8 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
 	struct pci_epf *epf = epf_test->epf;
 	struct device *dev = &epf->dev;
 	struct pci_epc *epc = epf->epc;
-	struct pci_epf_test_reg *reg = epf_test->reg[0];
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
+	struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
 
 	src_addr = pci_epc_mem_alloc_addr(epc, &phys_addr, reg->size);
 	if (!src_addr) {
@@ -195,7 +204,8 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
 	struct pci_epf *epf = epf_test->epf;
 	struct device *dev = &epf->dev;
 	struct pci_epc *epc = epf->epc;
-	struct pci_epf_test_reg *reg = epf_test->reg[0];
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
+	struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
 
 	dst_addr = pci_epc_mem_alloc_addr(epc, &phys_addr, reg->size);
 	if (!dst_addr) {
@@ -247,7 +257,8 @@ static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test)
 	u8 msi_count;
 	struct pci_epf *epf = epf_test->epf;
 	struct pci_epc *epc = epf->epc;
-	struct pci_epf_test_reg *reg = epf_test->reg[0];
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
+	struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
 
 	reg->status |= STATUS_IRQ_RAISED;
 	msi_count = pci_epc_get_msi(epc);
@@ -263,22 +274,28 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 	int ret;
 	u8 irq;
 	u8 msi_count;
+	u32 command;
 	struct pci_epf_test *epf_test = container_of(work, struct pci_epf_test,
 						     cmd_handler.work);
 	struct pci_epf *epf = epf_test->epf;
 	struct pci_epc *epc = epf->epc;
-	struct pci_epf_test_reg *reg = epf_test->reg[0];
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
+	struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
 
-	if (!reg->command)
+	command = reg->command;
+	if (!command)
 		goto reset_handler;
 
-	if (reg->command & COMMAND_RAISE_LEGACY_IRQ) {
+	reg->command = 0;
+	reg->status = 0;
+
+	if (command & COMMAND_RAISE_LEGACY_IRQ) {
 		reg->status = STATUS_IRQ_RAISED;
 		pci_epc_raise_irq(epc, PCI_EPC_IRQ_LEGACY, 0);
 		goto reset_handler;
 	}
 
-	if (reg->command & COMMAND_WRITE) {
+	if (command & COMMAND_WRITE) {
 		ret = pci_epf_test_write(epf_test);
 		if (ret)
 			reg->status |= STATUS_WRITE_FAIL;
@@ -288,7 +305,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 		goto reset_handler;
 	}
 
-	if (reg->command & COMMAND_READ) {
+	if (command & COMMAND_READ) {
 		ret = pci_epf_test_read(epf_test);
 		if (!ret)
 			reg->status |= STATUS_READ_SUCCESS;
@@ -298,7 +315,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 		goto reset_handler;
 	}
 
-	if (reg->command & COMMAND_COPY) {
+	if (command & COMMAND_COPY) {
 		ret = pci_epf_test_copy(epf_test);
 		if (!ret)
 			reg->status |= STATUS_COPY_SUCCESS;
@@ -308,9 +325,9 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 		goto reset_handler;
 	}
 
-	if (reg->command & COMMAND_RAISE_MSI_IRQ) {
+	if (command & COMMAND_RAISE_MSI_IRQ) {
 		msi_count = pci_epc_get_msi(epc);
-		irq = (reg->command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
+		irq = (command & MSI_NUMBER_MASK) >> MSI_NUMBER_SHIFT;
 		if (irq > msi_count || msi_count <= 0)
 			goto reset_handler;
 		reg->status = STATUS_IRQ_RAISED;
@@ -319,8 +336,6 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
 	}
 
 reset_handler:
-	reg->command = 0;
-
 	queue_delayed_work(kpcitest_workqueue, &epf_test->cmd_handler,
 			   msecs_to_jiffies(1));
 }
@@ -358,6 +373,7 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
 	struct pci_epc *epc = epf->epc;
 	struct device *dev = &epf->dev;
 	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
 
 	flags = PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_32;
 	if (sizeof(dma_addr_t) == 0x8)
@@ -370,7 +386,7 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
 		if (ret) {
 			pci_epf_free_space(epf, epf_test->reg[bar], bar);
 			dev_err(dev, "failed to set BAR%d\n", bar);
-			if (bar == BAR_0)
+			if (bar == test_reg_bar)
 				return ret;
 		}
 	}
@@ -384,17 +400,20 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 	struct device *dev = &epf->dev;
 	void *base;
 	int bar;
+	enum pci_barno test_reg_bar = epf_test->test_reg_bar;
 
 	base = pci_epf_alloc_space(epf, sizeof(struct pci_epf_test_reg),
-				   BAR_0);
+				   test_reg_bar);
 	if (!base) {
 		dev_err(dev, "failed to allocated register space\n");
 		return -ENOMEM;
 	}
-	epf_test->reg[0] = base;
+	epf_test->reg[test_reg_bar] = base;
 
-	for (bar = BAR_1; bar <= BAR_5; bar++) {
-		base = pci_epf_alloc_space(epf, bar_size[bar - 1], bar);
+	for (bar = BAR_0; bar <= BAR_5; bar++) {
+		if (bar == test_reg_bar)
+			continue;
+		base = pci_epf_alloc_space(epf, bar_size[bar], bar);
 		if (!base)
 			dev_err(dev, "failed to allocate space for BAR%d\n",
 				bar);
@@ -407,6 +426,7 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
 static int pci_epf_test_bind(struct pci_epf *epf)
 {
 	int ret;
+	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
 	struct pci_epf_header *header = epf->header;
 	struct pci_epc *epc = epf->epc;
 	struct device *dev = &epf->dev;
@@ -432,13 +452,34 @@ static int pci_epf_test_bind(struct pci_epf *epf)
 	if (ret)
 		return ret;
 
+	if (!epf_test->linkup_notifier)
+		queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work);
+
 	return 0;
 }
 
+static const struct pci_epf_device_id pci_epf_test_ids[] = {
+	{
+		.name = "pci_epf_test",
+	},
+	{},
+};
+
 static int pci_epf_test_probe(struct pci_epf *epf)
 {
 	struct pci_epf_test *epf_test;
 	struct device *dev = &epf->dev;
+	const struct pci_epf_device_id *match;
+	struct pci_epf_test_data *data;
+	enum pci_barno test_reg_bar = BAR_0;
+	bool linkup_notifier = true;
+
+	match = pci_epf_match_device(pci_epf_test_ids, epf);
+	data = (struct pci_epf_test_data *)match->driver_data;
+	if (data) {
+		test_reg_bar = data->test_reg_bar;
+		linkup_notifier = data->linkup_notifier;
+	}
 
 	epf_test = devm_kzalloc(dev, sizeof(*epf_test), GFP_KERNEL);
 	if (!epf_test)
@@ -446,6 +487,8 @@ static int pci_epf_test_probe(struct pci_epf *epf)
 
 	epf->header = &test_header;
 	epf_test->epf = epf;
+	epf_test->test_reg_bar = test_reg_bar;
+	epf_test->linkup_notifier = linkup_notifier;
 
 	INIT_DELAYED_WORK(&epf_test->cmd_handler, pci_epf_test_cmd_handler);
 
@@ -453,31 +496,15 @@ static int pci_epf_test_probe(struct pci_epf *epf)
 	return 0;
 }
 
-static int pci_epf_test_remove(struct pci_epf *epf)
-{
-	struct pci_epf_test *epf_test = epf_get_drvdata(epf);
-
-	kfree(epf_test);
-	return 0;
-}
-
 static struct pci_epf_ops ops = {
 	.unbind	= pci_epf_test_unbind,
 	.bind	= pci_epf_test_bind,
 	.linkup = pci_epf_test_linkup,
 };
 
-static const struct pci_epf_device_id pci_epf_test_ids[] = {
-	{
-		.name = "pci_epf_test",
-	},
-	{},
-};
-
 static struct pci_epf_driver test_driver = {
 	.driver.name	= "pci_epf_test",
 	.probe		= pci_epf_test_probe,
-	.remove		= pci_epf_test_remove,
 	.id_table	= pci_epf_test_ids,
 	.ops		= &ops,
 	.owner		= THIS_MODULE,

drivers/pci/endpoint/pci-epc-core.c

@@ -21,6 +21,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 
 #include <linux/pci-epc.h>
 #include <linux/pci-epf.h>
@@ -370,6 +371,7 @@ EXPORT_SYMBOL_GPL(pci_epc_write_header);
 int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf)
 {
 	unsigned long flags;
+	struct device *dev = epc->dev.parent;
 
 	if (epf->epc)
 		return -EBUSY;
@@ -381,8 +383,12 @@ int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf)
 		return -EINVAL;
 
 	epf->epc = epc;
-	dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask);
-	epf->dev.dma_mask = epc->dev.dma_mask;
+	if (dev->of_node) {
+		of_dma_configure(&epf->dev, dev->of_node);
+	} else {
+		dma_set_coherent_mask(&epf->dev, epc->dev.coherent_dma_mask);
+		epf->dev.dma_mask = epc->dev.dma_mask;
+	}
 
 	spin_lock_irqsave(&epc->lock, flags);
 	list_add_tail(&epf->list, &epc->pci_epf);
@@ -500,6 +506,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
 	dma_set_coherent_mask(&epc->dev, dev->coherent_dma_mask);
 	epc->dev.class = pci_epc_class;
 	epc->dev.dma_mask = dev->dma_mask;
+	epc->dev.parent = dev;
 	epc->ops = ops;
 
 	ret = dev_set_name(&epc->dev, "%s", dev_name(dev));

drivers/pci/endpoint/pci-epc-mem.c

@@ -24,21 +24,54 @@
 #include <linux/pci-epc.h>
 
 /**
- * pci_epc_mem_init() - initialize the pci_epc_mem structure
+ * pci_epc_mem_get_order() - determine the allocation order of a memory size
+ * @mem: address space of the endpoint controller
+ * @size: the size for which to get the order
+ *
+ * Reimplement get_order() for mem->page_size since the generic get_order
+ * always gets order with a constant PAGE_SIZE.
+ */
+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);
+
+	size--;
+	size >>= page_shift;
+#if BITS_PER_LONG == 32
+	order = fls(size);
+#else
+	order = fls64(size);
+#endif
+	return order;
+}
+
+/**
+ * __pci_epc_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
  *
  * 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)
+int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size,
+		       size_t page_size)
 {
 	int ret;
 	struct pci_epc_mem *mem;
 	unsigned long *bitmap;
-	int pages = size >> PAGE_SHIFT;
-	int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
+	unsigned int page_shift;
+	int pages;
+	int bitmap_size;
+
+	if (page_size < PAGE_SIZE)
+		page_size = PAGE_SIZE;
+
+	page_shift = ilog2(page_size);
+	pages = size >> page_shift;
+	bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
 
 	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
 	if (!mem) {
@@ -54,6 +87,7 @@ int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_base, size_t size)
 
 	mem->bitmap = bitmap;
 	mem->phys_base = phys_base;
+	mem->page_size = page_size;
 	mem->pages = pages;
 	mem->size = size;
 
@@ -67,7 +101,7 @@ err_mem:
 err:
 return ret;
 }
-EXPORT_SYMBOL_GPL(pci_epc_mem_init);
+EXPORT_SYMBOL_GPL(__pci_epc_mem_init);
 
 /**
  * pci_epc_mem_exit() - cleanup the pci_epc_mem structure
@@ -101,13 +135,17 @@ void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
 	int pageno;
 	void __iomem *virt_addr;
 	struct pci_epc_mem *mem = epc->mem;
-	int order = get_order(size);
+	unsigned int page_shift = ilog2(mem->page_size);
+	int order;
+
+	size = ALIGN(size, mem->page_size);
+	order = pci_epc_mem_get_order(mem, size);
 
 	pageno = bitmap_find_free_region(mem->bitmap, mem->pages, order);
 	if (pageno < 0)
 		return NULL;
 
-	*phys_addr = mem->phys_base + (pageno << PAGE_SHIFT);
+	*phys_addr = mem->phys_base + (pageno << page_shift);
 	virt_addr = ioremap(*phys_addr, size);
 	if (!virt_addr)
 		bitmap_release_region(mem->bitmap, pageno, order);
@@ -129,11 +167,14 @@ void pci_epc_mem_free_addr(struct pci_epc *epc, phys_addr_t phys_addr,
 			   void __iomem *virt_addr, size_t size)
 {
 	int pageno;
-	int order = get_order(size);
 	struct pci_epc_mem *mem = epc->mem;
+	unsigned int page_shift = ilog2(mem->page_size);
+	int order;
 
 	iounmap(virt_addr);
-	pageno = (phys_addr - mem->phys_base) >> PAGE_SHIFT;
+	pageno = (phys_addr - mem->phys_base) >> page_shift;
+	size = ALIGN(size, mem->page_size);
+	order = pci_epc_mem_get_order(mem, size);
 	bitmap_release_region(mem->bitmap, pageno, order);
 }
 EXPORT_SYMBOL_GPL(pci_epc_mem_free_addr);

drivers/pci/endpoint/pci-epf-core.c

@@ -267,6 +267,22 @@ err_ret:
 }
 EXPORT_SYMBOL_GPL(pci_epf_create);
 
+const struct pci_epf_device_id *
+pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf)
+{
+	if (!id || !epf)
+		return NULL;
+
+	while (*id->name) {
+		if (strcmp(epf->name, id->name) == 0)
+			return id;
+		id++;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(pci_epf_match_device);
+
 static void pci_epf_dev_release(struct device *dev)
 {
 	struct pci_epf *epf = to_pci_epf(dev);
@@ -317,11 +333,12 @@ static int pci_epf_device_probe(struct device *dev)
 
 static int pci_epf_device_remove(struct device *dev)
 {
-	int ret;
+	int ret = 0;
 	struct pci_epf *epf = to_pci_epf(dev);
 	struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
 
-	ret = driver->remove(epf);
+	if (driver->remove)
+		ret = driver->remove(epf);
 	epf->driver = NULL;
 
 	return ret;

include/linux/pci-epc.h

@@ -62,11 +62,13 @@ struct pci_epc_ops {
  * @size: the size of the PCI address space
  * @bitmap: bitmap to manage the PCI address space
  * @pages: number of bits representing the address region
+ * @page_size: size of each page
  */
 struct pci_epc_mem {
 	phys_addr_t	phys_base;
 	size_t		size;
 	unsigned long	*bitmap;
+	size_t		page_size;
 	int		pages;
 };
 
@@ -98,6 +100,9 @@ struct pci_epc {
 #define devm_pci_epc_create(dev, ops)    \
 		__devm_pci_epc_create((dev), (ops), THIS_MODULE)
 
+#define pci_epc_mem_init(epc, phys_addr, size)	\
+		__pci_epc_mem_init((epc), (phys_addr), (size), PAGE_SIZE)
+
 static inline void epc_set_drvdata(struct pci_epc *epc, void *data)
 {
 	dev_set_drvdata(&epc->dev, data);
@@ -135,7 +140,8 @@ void pci_epc_stop(struct pci_epc *epc);
 struct pci_epc *pci_epc_get(const char *epc_name);
 void pci_epc_put(struct pci_epc *epc);
 
-int pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size);
+int __pci_epc_mem_init(struct pci_epc *epc, phys_addr_t phys_addr, size_t size,
+		       size_t page_size);
 void pci_epc_mem_exit(struct pci_epc *epc);
 void __iomem *pci_epc_mem_alloc_addr(struct pci_epc *epc,
 				     phys_addr_t *phys_addr, size_t size);

include/linux/pci-epf.h

@@ -142,6 +142,8 @@ static inline void *epf_get_drvdata(struct pci_epf *epf)
 	return dev_get_drvdata(&epf->dev);
 }
 
+const struct pci_epf_device_id *
+pci_epf_match_device(const struct pci_epf_device_id *id, struct pci_epf *epf);
 struct pci_epf *pci_epf_create(const char *name);
 void pci_epf_destroy(struct pci_epf *epf);
 int __pci_epf_register_driver(struct pci_epf_driver *driver,

tools/pci/pcitest.c

@@ -173,6 +173,7 @@ usage:
 			"\t-D <dev>		PCI endpoint test device {default: /dev/pci-endpoint-test.0}\n"
 			"\t-b <bar num>		BAR test (bar number between 0..5)\n"
 			"\t-m <msi num>		MSI test (msi number between 1..32)\n"
+			"\t-l			Legacy IRQ test\n"
 			"\t-r			Read buffer test\n"
 			"\t-w			Write buffer test\n"
 			"\t-c			Copy buffer test\n"