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-rw-r--r--drivers/misc/pci_endpoint_test.c12
-rw-r--r--drivers/pci/cadence/pcie-cadence-ep.c15
-rw-r--r--drivers/pci/dwc/pcie-designware-ep.c34
-rw-r--r--drivers/pci/endpoint/functions/pci-epf-test.c28
-rw-r--r--drivers/pci/endpoint/pci-epc-core.c32
-rw-r--r--drivers/pci/endpoint/pci-epf-core.c56
-rw-r--r--include/linux/pci-epc.h11
-rw-r--r--include/linux/pci-epf.h2
8 files changed, 109 insertions, 81 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 320276f42653..fe8897e64635 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -534,12 +534,14 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev,
}
for (bar = BAR_0; bar <= BAR_5; bar++) {
- base = pci_ioremap_bar(pdev, bar);
- if (!base) {
- dev_err(dev, "failed to read BAR%d\n", bar);
- WARN_ON(bar == test_reg_bar);
+ if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) {
+ base = pci_ioremap_bar(pdev, bar);
+ if (!base) {
+ dev_err(dev, "failed to read BAR%d\n", bar);
+ WARN_ON(bar == test_reg_bar);
+ }
+ test->bar[bar] = base;
}
- test->bar[bar] = base;
}
test->base = test->bar[test_reg_bar];
diff --git a/drivers/pci/cadence/pcie-cadence-ep.c b/drivers/pci/cadence/pcie-cadence-ep.c
index 3c3a97743453..3d8283e450a9 100644
--- a/drivers/pci/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/cadence/pcie-cadence-ep.c
@@ -77,16 +77,19 @@ static int cdns_pcie_ep_write_header(struct pci_epc *epc, u8 fn,
return 0;
}
-static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, enum pci_barno bar,
- dma_addr_t bar_phys, size_t size, int flags)
+static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
+ struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
+ dma_addr_t bar_phys = epf_bar->phys_addr;
+ enum pci_barno bar = epf_bar->barno;
+ int flags = epf_bar->flags;
u32 addr0, addr1, reg, cfg, b, aperture, ctrl;
u64 sz;
/* BAR size is 2^(aperture + 7) */
- sz = max_t(size_t, size, CDNS_PCIE_EP_MIN_APERTURE);
+ sz = max_t(size_t, epf_bar->size, CDNS_PCIE_EP_MIN_APERTURE);
/*
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.
@@ -103,6 +106,9 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, enum pci_barno bar,
if (is_64bits && (bar & 1))
return -EINVAL;
+ if (is_64bits && !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
+ epf_bar->flags |= PCI_BASE_ADDRESS_MEM_TYPE_64;
+
if (is_64bits && is_prefetch)
ctrl = CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS;
else if (is_prefetch)
@@ -139,10 +145,11 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, enum pci_barno bar,
}
static void cdns_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
- enum pci_barno bar)
+ struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
+ enum pci_barno bar = epf_bar->barno;
u32 reg, cfg, b, ctrl;
if (bar < BAR_4) {
diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c
index 9236b998327f..f07678bf7cfc 100644
--- a/drivers/pci/dwc/pcie-designware-ep.c
+++ b/drivers/pci/dwc/pcie-designware-ep.c
@@ -19,7 +19,8 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
pci_epc_linkup(epc);
}
-void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
+static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar,
+ int flags)
{
u32 reg;
@@ -27,9 +28,18 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
dw_pcie_dbi_ro_wr_en(pci);
dw_pcie_writel_dbi2(pci, reg, 0x0);
dw_pcie_writel_dbi(pci, reg, 0x0);
+ if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
+ dw_pcie_writel_dbi2(pci, reg + 4, 0x0);
+ dw_pcie_writel_dbi(pci, reg + 4, 0x0);
+ }
dw_pcie_dbi_ro_wr_dis(pci);
}
+void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
+{
+ __dw_pcie_ep_reset_bar(pci, bar, 0);
+}
+
static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr)
{
@@ -104,25 +114,28 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t phys_addr,
}
static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar)
+ struct pci_epf_bar *epf_bar)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ enum pci_barno bar = epf_bar->barno;
u32 atu_index = ep->bar_to_atu[bar];
- dw_pcie_ep_reset_bar(pci, bar);
+ __dw_pcie_ep_reset_bar(pci, bar, epf_bar->flags);
dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
clear_bit(atu_index, ep->ib_window_map);
}
static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar,
- dma_addr_t bar_phys, size_t size, int flags)
+ struct pci_epf_bar *epf_bar)
{
int ret;
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ enum pci_barno bar = epf_bar->barno;
+ size_t size = epf_bar->size;
+ int flags = epf_bar->flags;
enum dw_pcie_as_type as_type;
u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
@@ -131,13 +144,20 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
else
as_type = DW_PCIE_AS_IO;
- ret = dw_pcie_ep_inbound_atu(ep, bar, bar_phys, as_type);
+ ret = dw_pcie_ep_inbound_atu(ep, bar, epf_bar->phys_addr, as_type);
if (ret)
return ret;
dw_pcie_dbi_ro_wr_en(pci);
- dw_pcie_writel_dbi2(pci, reg, size - 1);
+
+ dw_pcie_writel_dbi2(pci, reg, lower_32_bits(size - 1));
dw_pcie_writel_dbi(pci, reg, flags);
+
+ if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
+ dw_pcie_writel_dbi2(pci, reg + 4, upper_32_bits(size - 1));
+ dw_pcie_writel_dbi(pci, reg + 4, 0);
+ }
+
dw_pcie_dbi_ro_wr_dis(pci);
return 0;
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 64d8a17f8094..7cef85124325 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -70,7 +70,7 @@ struct pci_epf_test_data {
bool linkup_notifier;
};
-static int bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 };
+static size_t bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 };
static int pci_epf_test_copy(struct pci_epf_test *epf_test)
{
@@ -344,21 +344,23 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epc *epc = epf->epc;
+ struct pci_epf_bar *epf_bar;
int bar;
cancel_delayed_work(&epf_test->cmd_handler);
pci_epc_stop(epc);
for (bar = BAR_0; bar <= BAR_5; bar++) {
+ epf_bar = &epf->bar[bar];
+
if (epf_test->reg[bar]) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
- pci_epc_clear_bar(epc, epf->func_no, bar);
+ pci_epc_clear_bar(epc, epf->func_no, epf_bar);
}
}
}
static int pci_epf_test_set_bar(struct pci_epf *epf)
{
- int flags;
int bar;
int ret;
struct pci_epf_bar *epf_bar;
@@ -367,21 +369,27 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
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)
- flags |= PCI_BASE_ADDRESS_MEM_TYPE_64;
-
for (bar = BAR_0; bar <= BAR_5; bar++) {
epf_bar = &epf->bar[bar];
- ret = pci_epc_set_bar(epc, epf->func_no, bar,
- epf_bar->phys_addr,
- epf_bar->size, flags);
+
+ epf_bar->flags |= upper_32_bits(epf_bar->size) ?
+ PCI_BASE_ADDRESS_MEM_TYPE_64 :
+ PCI_BASE_ADDRESS_MEM_TYPE_32;
+
+ ret = pci_epc_set_bar(epc, epf->func_no, epf_bar);
if (ret) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
dev_err(dev, "failed to set BAR%d\n", bar);
if (bar == test_reg_bar)
return ret;
}
+ /*
+ * pci_epc_set_bar() sets PCI_BASE_ADDRESS_MEM_TYPE_64
+ * if the specific implementation required a 64-bit BAR,
+ * even if we only requested a 32-bit BAR.
+ */
+ if (epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)
+ bar++;
}
return 0;
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index e245bba0ab53..b0ee42739c3c 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -276,22 +276,25 @@ EXPORT_SYMBOL_GPL(pci_epc_map_addr);
* pci_epc_clear_bar() - reset the BAR
* @epc: the EPC device for which the BAR has to be cleared
* @func_no: the endpoint function number in the EPC device
- * @bar: the BAR number that has to be reset
+ * @epf_bar: the struct epf_bar that contains the BAR information
*
* Invoke to reset the BAR of the endpoint device.
*/
-void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar)
+void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar)
{
unsigned long flags;
- if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
+ if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
+ (epf_bar->barno == BAR_5 &&
+ epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
return;
if (!epc->ops->clear_bar)
return;
spin_lock_irqsave(&epc->lock, flags);
- epc->ops->clear_bar(epc, func_no, bar);
+ epc->ops->clear_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, flags);
}
EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
@@ -300,26 +303,31 @@ EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
* pci_epc_set_bar() - configure BAR in order for host to assign PCI addr space
* @epc: the EPC device on which BAR has to be configured
* @func_no: the endpoint function number in the EPC device
- * @bar: the BAR number that has to be configured
- * @size: the size of the addr space
- * @flags: specify memory allocation/io allocation/32bit address/64 bit address
+ * @epf_bar: the struct epf_bar that contains the BAR information
*
* Invoke to configure the BAR of the endpoint device.
*/
-int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, enum pci_barno bar,
- dma_addr_t bar_phys, size_t size, int flags)
+int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar)
{
int ret;
unsigned long irq_flags;
-
- if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
+ int flags = epf_bar->flags;
+
+ if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
+ (epf_bar->barno == BAR_5 &&
+ flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ||
+ (flags & PCI_BASE_ADDRESS_SPACE_IO &&
+ flags & PCI_BASE_ADDRESS_IO_MASK) ||
+ (upper_32_bits(epf_bar->size) &&
+ !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64)))
return -EINVAL;
if (!epc->ops->set_bar)
return 0;
spin_lock_irqsave(&epc->lock, irq_flags);
- ret = epc->ops->set_bar(epc, func_no, bar, bar_phys, size, flags);
+ ret = epc->ops->set_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, irq_flags);
return ret;
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 766ce1dca2ec..465b5f058b6d 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -98,6 +98,8 @@ void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar)
epf->bar[bar].phys_addr = 0;
epf->bar[bar].size = 0;
+ epf->bar[bar].barno = 0;
+ epf->bar[bar].flags = 0;
}
EXPORT_SYMBOL_GPL(pci_epf_free_space);
@@ -126,6 +128,8 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar)
epf->bar[bar].phys_addr = phys_addr;
epf->bar[bar].size = size;
+ epf->bar[bar].barno = bar;
+ epf->bar[bar].flags = PCI_BASE_ADDRESS_SPACE_MEMORY;
return space;
}
@@ -200,29 +204,17 @@ struct pci_epf *pci_epf_create(const char *name)
int ret;
struct pci_epf *epf;
struct device *dev;
- char *func_name;
- char *buf;
+ int len;
epf = kzalloc(sizeof(*epf), GFP_KERNEL);
- if (!epf) {
- ret = -ENOMEM;
- goto err_ret;
- }
-
- buf = kstrdup(name, GFP_KERNEL);
- if (!buf) {
- ret = -ENOMEM;
- goto free_epf;
- }
-
- func_name = buf;
- buf = strchrnul(buf, '.');
- *buf = '\0';
+ if (!epf)
+ return ERR_PTR(-ENOMEM);
- epf->name = kstrdup(func_name, GFP_KERNEL);
+ len = strchrnul(name, '.') - name;
+ epf->name = kstrndup(name, len, GFP_KERNEL);
if (!epf->name) {
- ret = -ENOMEM;
- goto free_func_name;
+ kfree(epf);
+ return ERR_PTR(-ENOMEM);
}
dev = &epf->dev;
@@ -231,28 +223,18 @@ struct pci_epf *pci_epf_create(const char *name)
dev->type = &pci_epf_type;
ret = dev_set_name(dev, "%s", name);
- if (ret)
- goto put_dev;
+ if (ret) {
+ put_device(dev);
+ return ERR_PTR(ret);
+ }
ret = device_add(dev);
- if (ret)
- goto put_dev;
+ if (ret) {
+ put_device(dev);
+ return ERR_PTR(ret);
+ }
- kfree(func_name);
return epf;
-
-put_dev:
- put_device(dev);
- kfree(epf->name);
-
-free_func_name:
- kfree(func_name);
-
-free_epf:
- kfree(epf);
-
-err_ret:
- return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(pci_epf_create);
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index a1a5e5df0f66..af657ca58b70 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -39,10 +39,9 @@ struct pci_epc_ops {
int (*write_header)(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int (*set_bar)(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar,
- dma_addr_t bar_phys, size_t size, int flags);
+ struct pci_epf_bar *epf_bar);
void (*clear_bar)(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar);
+ struct pci_epf_bar *epf_bar);
int (*map_addr)(struct pci_epc *epc, u8 func_no,
phys_addr_t addr, u64 pci_addr, size_t size);
void (*unmap_addr)(struct pci_epc *epc, u8 func_no,
@@ -127,9 +126,9 @@ void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar,
- dma_addr_t bar_phys, size_t size, int flags);
-void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar);
+ struct pci_epf_bar *epf_bar);
+void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar);
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr,
u64 pci_addr, size_t size);
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index e897bf076701..f7d6f4883f8b 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -97,6 +97,8 @@ struct pci_epf_driver {
struct pci_epf_bar {
dma_addr_t phys_addr;
size_t size;
+ enum pci_barno barno;
+ int flags;
};
/**
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 07:32:13 +0000