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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
This commit is contained in:
Bjorn Helgaas 2017-09-07 13:24:11 -05:00
parent 99fd1b958c e475842232
commit 3a749ea1c0
11 changed files with 276 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

132
drivers/misc/pci_endpoint_test.c
View File

@ -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;
}

13
drivers/pci/dwc/pci-dra7xx.c
View File

@ -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);
}

7
drivers/pci/dwc/pcie-designware-ep.c
View File

@ -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;

1
drivers/pci/dwc/pcie-designware.h
View File

@ -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;

99
drivers/pci/endpoint/functions/pci-epf-test.c
View File

@ -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,

11
drivers/pci/endpoint/pci-epc-core.c
View File

@ -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));

59
drivers/pci/endpoint/pci-epc-mem.c
View File

@ -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);

21
drivers/pci/endpoint/pci-epf-core.c
View File

@ -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;

8
include/linux/pci-epc.h
View File

@ -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);

2
include/linux/pci-epf.h
View File

@ -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,

1
tools/pci/pcitest.c
View File

@ -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"