[PATCH v2 2/4] PCI: designware: Add ARM64 support
Gabriele Paoloni
gabriele.paoloni at huawei.com
Thu Jun 11 07:32:42 PDT 2015
Hi Zhou Wang
I apologize, I made a mistake as I didn't rebase the patch on the latest Kernel (where I was convinced I did), my bad.
The patch below is based on v4.1-rc7
It passes checkpatch and compiles OK
Cheers
Gab
-------------------------------------------
-------------------------------------------
This patch is a rework of
"[PATCH v2 2/4] PCI: designware: Add ARM64 support" from Zhou Wang.
The intention is to complete the unification between ARM and
ARM64 now that the dependency on arch/arm/kernel/bios32.c is gone.
I have also included the rework asked by James Morse:
io_base declared as resource_size_t
It compiles fine on ARCH arm and arm64 on Linux 4.1-rc7.
It needs to be tested.
Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
---
drivers/pci/host/pci-dra7xx.c | 1 +
drivers/pci/host/pci-exynos.c | 2 +-
drivers/pci/host/pci-imx6.c | 2 +-
drivers/pci/host/pci-keystone.c | 2 +-
drivers/pci/host/pci-layerscape.c | 2 +-
drivers/pci/host/pcie-designware.c | 242 +++++++++++++++----------------------
drivers/pci/host/pcie-designware.h | 10 +-
drivers/pci/host/pcie-spear13xx.c | 2 +-
8 files changed, 109 insertions(+), 154 deletions(-)
diff --git a/drivers/pci/host/pci-dra7xx.c b/drivers/pci/host/pci-dra7xx.c
index 2d57e19..5c8b6ab 100644
--- a/drivers/pci/host/pci-dra7xx.c
+++ b/drivers/pci/host/pci-dra7xx.c
@@ -280,6 +280,7 @@ static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
pp = &dra7xx->pp;
pp->dev = dev;
+ pp->root_bus_nr = 0;
pp->ops = &dra7xx_pcie_host_ops;
pp->irq = platform_get_irq(pdev, 1);
diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
index c139237..4b6db6c 100644
--- a/drivers/pci/host/pci-exynos.c
+++ b/drivers/pci/host/pci-exynos.c
@@ -534,7 +534,7 @@ static int __init exynos_add_pcie_port(struct pcie_port *pp,
}
}
- pp->root_bus_nr = -1;
+ pp->root_bus_nr = 0;
pp->ops = &exynos_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index fdb9536..c4a80c5 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -541,7 +541,7 @@ static int __init imx6_add_pcie_port(struct pcie_port *pp,
}
}
- pp->root_bus_nr = -1;
+ pp->root_bus_nr = 0;
pp->ops = &imx6_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c
index 75333b0..df91f5e 100644
--- a/drivers/pci/host/pci-keystone.c
+++ b/drivers/pci/host/pci-keystone.c
@@ -312,7 +312,7 @@ static int __init ks_add_pcie_port(struct keystone_pcie *ks_pcie,
return ret;
}
- pp->root_bus_nr = -1;
+ pp->root_bus_nr = 0;
pp->ops = &keystone_pcie_host_ops;
ret = ks_dw_pcie_host_init(ks_pcie, ks_pcie->msi_intc_np);
if (ret) {
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 4a6e62f..5c7a9c4 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -101,7 +101,7 @@ static int ls_add_pcie_port(struct ls_pcie *pcie)
pp = &pcie->pp;
pp->dev = pcie->dev;
pp->dbi_base = pcie->dbi;
- pp->root_bus_nr = -1;
+ pp->root_bus_nr = 0;
pp->ops = &ls_pcie_host_ops;
ret = dw_pcie_host_init(pp);
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 2e9f84f..844febee 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -11,6 +11,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/hardirq.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
@@ -67,16 +68,7 @@
#define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
#define PCIE_ATU_UPPER_TARGET 0x91C
-static struct hw_pci dw_pci;
-
-static unsigned long global_io_offset;
-
-static inline struct pcie_port *sys_to_pcie(struct pci_sys_data *sys)
-{
- BUG_ON(!sys->private_data);
-
- return sys->private_data;
-}
+static struct pci_ops dw_pcie_ops;
int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val)
{
@@ -238,7 +230,7 @@ static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq)
static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos)
{
int irq, pos0, i;
- struct pcie_port *pp = sys_to_pcie(desc->dev->bus->sysdata);
+ struct pcie_port *pp = desc->dev->bus->sysdata;
pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS,
order_base_2(no_irqs));
@@ -281,7 +273,7 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev,
{
int irq, pos;
struct msi_msg msg;
- struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata);
+ struct pcie_port *pp = pdev->bus->sysdata;
if (desc->msi_attrib.is_msix)
return -EINVAL;
@@ -310,7 +302,7 @@ static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq)
{
struct irq_data *data = irq_get_irq_data(irq);
struct msi_desc *msi = irq_data_get_msi(data);
- struct pcie_port *pp = sys_to_pcie(msi->dev->bus->sysdata);
+ struct pcie_port *pp = msi->dev->bus->sysdata;
clear_irq_range(pp, irq, 1, data->hwirq);
}
@@ -342,16 +334,24 @@ static const struct irq_domain_ops msi_domain_ops = {
.map = dw_pcie_msi_map,
};
-int dw_pcie_host_init(struct pcie_port *pp)
+int __init dw_pcie_host_init(struct pcie_port *pp)
{
struct device_node *np = pp->dev->of_node;
struct platform_device *pdev = to_platform_device(pp->dev);
- struct of_pci_range range;
- struct of_pci_range_parser parser;
+ struct pci_bus *bus;
struct resource *cfg_res;
+ LIST_HEAD(res);
u32 val, na, ns;
const __be32 *addrp;
int i, index, ret;
+ int rlen;
+ struct resource_entry *win;
+ const __be32 *parser_range_end = of_get_property(np, "ranges", &rlen);
+
+ if (parser_range_end == NULL)
+ return -ENOENT;
+ parser_range_end += rlen/sizeof(__be32);
+
/* Find the address cell size and the number of cells in order to get
* the untranslated address.
@@ -375,78 +375,67 @@ int dw_pcie_host_init(struct pcie_port *pp)
dev_err(pp->dev, "missing *config* reg space\n");
}
- if (of_pci_range_parser_init(&parser, np)) {
- dev_err(pp->dev, "missing ranges property\n");
- return -EINVAL;
- }
+ ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp->io_base);
+ if (ret)
+ return ret;
/* Get the I/O and memory ranges from DT */
- for_each_of_pci_range(&parser, &range) {
- unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
-
- if (restype == IORESOURCE_IO) {
- of_pci_range_to_resource(&range, np, &pp->io);
- pp->io.name = "I/O";
- pp->io.start = max_t(resource_size_t,
- PCIBIOS_MIN_IO,
- range.pci_addr + global_io_offset);
- pp->io.end = min_t(resource_size_t,
- IO_SPACE_LIMIT,
- range.pci_addr + range.size
- + global_io_offset - 1);
- pp->io_size = resource_size(&pp->io);
- pp->io_bus_addr = range.pci_addr;
- pp->io_base = range.cpu_addr;
-
- /* Find the untranslated IO space address */
- pp->io_mod_base = of_read_number(parser.range -
- parser.np + na, ns);
- }
- if (restype == IORESOURCE_MEM) {
- of_pci_range_to_resource(&range, np, &pp->mem);
- pp->mem.name = "MEM";
- pp->mem_size = resource_size(&pp->mem);
- pp->mem_bus_addr = range.pci_addr;
-
- /* Find the untranslated MEM space address */
- pp->mem_mod_base = of_read_number(parser.range -
- parser.np + na, ns);
- }
- if (restype == 0) {
- of_pci_range_to_resource(&range, np, &pp->cfg);
- pp->cfg0_size = resource_size(&pp->cfg)/2;
- pp->cfg1_size = resource_size(&pp->cfg)/2;
- pp->cfg0_base = pp->cfg.start;
- pp->cfg1_base = pp->cfg.start + pp->cfg0_size;
+ resource_list_for_each_entry(win, &res) {
+ switch (resource_type(win->res)) {
+ case IORESOURCE_IO:
+ pp->io = win->res;
+ pp->io->name = "I/O";
+ pp->io_size = resource_size(pp->io);
+ pp->io_bus_addr = pp->io->start - win->offset;
+ /* magic 5 below comes from magic na and ns in
+ * of_pci_range_parser_init() */
+ pp->io_mod_base = of_read_number(parser_range_end -
+ of_n_addr_cells(np) - 5 + na, ns);
+ ret = pci_remap_iospace(pp->io, pp->io_base);
+ if (ret) {
+ dev_warn(pp->dev, "error %d: failed to map resource %pR\n",
+ ret, pp->io);
+ continue;
+ }
+ break;
+ case IORESOURCE_MEM:
+ pp->mem = win->res;
+ pp->mem->name = "MEM";
+ pp->mem_size = resource_size(pp->mem);
+ pp->mem_bus_addr = pp->mem->start - win->offset;
+ pp->mem_mod_base = of_read_number(parser_range_end -
+ of_n_addr_cells(np) - 5 + na, ns);
+ break;
+ case 0:
+ pp->cfg = win->res;
+ pp->cfg0_size = resource_size(pp->cfg)/2;
+ pp->cfg1_size = resource_size(pp->cfg)/2;
+ pp->cfg0_base = pp->cfg->start;
+ pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
/* Find the untranslated configuration space address */
- pp->cfg0_mod_base = of_read_number(parser.range -
- parser.np + na, ns);
- pp->cfg1_mod_base = pp->cfg0_mod_base +
- pp->cfg0_size;
+ pp->cfg0_mod_base = of_read_number(parser_range_end -
+ of_n_addr_cells(np) - 5 + na, ns);
+ pp->cfg1_mod_base = pp->cfg0_mod_base + pp->cfg0_size;
+ break;
+ case IORESOURCE_BUS:
+ pp->busn = win->res;
+ break;
+ default:
+ continue;
}
}
- ret = of_pci_parse_bus_range(np, &pp->busn);
- if (ret < 0) {
- pp->busn.name = np->name;
- pp->busn.start = 0;
- pp->busn.end = 0xff;
- pp->busn.flags = IORESOURCE_BUS;
- dev_dbg(pp->dev, "failed to parse bus-range property: %d, using default %pR\n",
- ret, &pp->busn);
- }
-
if (!pp->dbi_base) {
- pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start,
- resource_size(&pp->cfg));
+ pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start,
+ resource_size(pp->cfg));
if (!pp->dbi_base) {
dev_err(pp->dev, "error with ioremap\n");
return -ENOMEM;
}
}
- pp->mem_base = pp->mem.start;
+ pp->mem_base = pp->mem->start;
if (!pp->va_cfg0_base) {
pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,
@@ -493,24 +482,47 @@ int dw_pcie_host_init(struct pcie_port *pp)
if (pp->ops->host_init)
pp->ops->host_init(pp);
- dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
+ if (dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0)
+ != PCIBIOS_SUCCESSFUL)
+ return -EINVAL;
/* program correct class for RC */
- dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI);
+ if (dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2, PCI_CLASS_BRIDGE_PCI)
+ != PCIBIOS_SUCCESSFUL)
+ return -EINVAL;
+
+ if (dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val)
+ != PCIBIOS_SUCCESSFUL)
+ return -EINVAL;
- dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
val |= PORT_LOGIC_SPEED_CHANGE;
- dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
-#ifdef CONFIG_PCI_MSI
- dw_pcie_msi_chip.dev = pp->dev;
- dw_pci.msi_ctrl = &dw_pcie_msi_chip;
+ if (dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val)
+ != PCIBIOS_SUCCESSFUL)
+ return -EINVAL;
+
+ bus = pci_create_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
+ pp, &res);
+ if (!bus)
+ return -ENOMEM;
+
+#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
+ bus->msi = container_of(&pp->irq_domain, struct msi_controller, domain);
+#else
+ bus->msi = &dw_pcie_msi_chip;
#endif
- dw_pci.nr_controllers = 1;
- dw_pci.private_data = (void **)&pp;
+ pci_scan_child_bus(bus);
+ if (pp->ops->scan_bus)
+ pp->ops->scan_bus(pp);
- pci_common_init_dev(pp->dev, &dw_pci);
+#ifdef CONFIG_ARM
+ /* support old dtbs that incorrectly describe IRQs */
+ pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
+#endif
+
+ pci_assign_unassigned_bus_resources(bus);
+ pci_bus_add_devices(bus);
return 0;
}
@@ -653,7 +665,7 @@ static int dw_pcie_valid_config(struct pcie_port *pp,
static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
- struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+ struct pcie_port *pp = bus->sysdata;
int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) {
@@ -677,7 +689,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 val)
{
- struct pcie_port *pp = sys_to_pcie(bus->sysdata);
+ struct pcie_port *pp = bus->sysdata;
int ret;
if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
@@ -701,64 +713,6 @@ static struct pci_ops dw_pcie_ops = {
.write = dw_pcie_wr_conf,
};
-static int dw_pcie_setup(int nr, struct pci_sys_data *sys)
-{
- struct pcie_port *pp;
-
- pp = sys_to_pcie(sys);
-
- if (global_io_offset < SZ_1M && pp->io_size > 0) {
- sys->io_offset = global_io_offset - pp->io_bus_addr;
- pci_ioremap_io(global_io_offset, pp->io_base);
- global_io_offset += SZ_64K;
- pci_add_resource_offset(&sys->resources, &pp->io,
- sys->io_offset);
- }
-
- sys->mem_offset = pp->mem.start - pp->mem_bus_addr;
- pci_add_resource_offset(&sys->resources, &pp->mem, sys->mem_offset);
- pci_add_resource(&sys->resources, &pp->busn);
-
- return 1;
-}
-
-static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data *sys)
-{
- struct pci_bus *bus;
- struct pcie_port *pp = sys_to_pcie(sys);
-
- pp->root_bus_nr = sys->busnr;
- bus = pci_create_root_bus(pp->dev, sys->busnr,
- &dw_pcie_ops, sys, &sys->resources);
- if (!bus)
- return NULL;
-
- pci_scan_child_bus(bus);
-
- if (bus && pp->ops->scan_bus)
- pp->ops->scan_bus(pp);
-
- return bus;
-}
-
-static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
- int irq;
-
- irq = of_irq_parse_and_map_pci(dev, slot, pin);
- if (!irq)
- irq = pp->irq;
-
- return irq;
-}
-
-static struct hw_pci dw_pci = {
- .setup = dw_pcie_setup,
- .scan = dw_pcie_scan_bus,
- .map_irq = dw_pcie_map_irq,
-};
-
void dw_pcie_setup_rc(struct pcie_port *pp)
{
u32 val;
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index d0bbd27..ab78710 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -34,7 +34,7 @@ struct pcie_port {
u64 cfg1_mod_base;
void __iomem *va_cfg1_base;
u32 cfg1_size;
- u64 io_base;
+ resource_size_t io_base;
u64 io_mod_base;
phys_addr_t io_bus_addr;
u32 io_size;
@@ -42,10 +42,10 @@ struct pcie_port {
u64 mem_mod_base;
phys_addr_t mem_bus_addr;
u32 mem_size;
- struct resource cfg;
- struct resource io;
- struct resource mem;
- struct resource busn;
+ struct resource *cfg;
+ struct resource *io;
+ struct resource *mem;
+ struct resource *busn;
int irq;
u32 lanes;
struct pcie_host_ops *ops;
diff --git a/drivers/pci/host/pcie-spear13xx.c b/drivers/pci/host/pcie-spear13xx.c
index 020d788..e78ddf8 100644
--- a/drivers/pci/host/pcie-spear13xx.c
+++ b/drivers/pci/host/pcie-spear13xx.c
@@ -287,7 +287,7 @@ static int spear13xx_add_pcie_port(struct pcie_port *pp,
return ret;
}
- pp->root_bus_nr = -1;
+ pp->root_bus_nr = 0;
pp->ops = &spear13xx_pcie_host_ops;
ret = dw_pcie_host_init(pp);
--------------------------------------------------
--------------------------------------------------
> -----Original Message-----
> From: Wangzhou (B)
> Sent: Thursday, June 11, 2015 6:44 AM
> To: Gabriele Paoloni
> Cc: Lorenzo Pieralisi; James Morse; Bjorn Helgaas; Jingoo Han; Pratyush
> Anand; Arnd Bergmann; fabrice.gasnier at st.com; Liviu Dudau; linux-
> pci at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> devicetree at vger.kernel.org; Yuanzhichang; Zhudacai; zhangjukuo;
> qiuzhenfa; Liguozhu (Kenneth)
> Subject: Re: [PATCH v2 2/4] PCI: designware: Add ARM64 support
>
> On 2015/6/10 21:35, Gabriele Paoloni wrote:
> > Hi Zhou Wang and all
> >
> > I have worked on a patch that unify ARM and ARM64. As you can see I
> have removed the parser and now I use
> "of_pci_get_host_bridge_resources" in order to retrieve the resources
> associated to each pci host bridge window.
> > The resources now are not copied to the designware pcie_port pp,
> instead they are passed by pointer.
> >
> > This patch is intended to replace entirely "[PATCH v2 2/4]"; so I
> have also included all the changes about the other drivers
> >
> > Please find the patch inline below.
> >
> > Let me know if you think it is ok.
> >
> > Regards
> >
> > Gab
> >
> > ------------------------------------
> > ------------------------------------
> >
> > This patch is a rework of
> > "[PATCH v2 2/4] PCI: designware: Add ARM64 support" from Zhou Wang.
> >
> > The intention is to complete the unification between ARM and
> > ARM64 now that the dependency on arch/arm/kernel/bios32.c is gone.
> >
> > I have also included the rework asked by James Morse:
> > io_base declared as resource_size_t
> >
> > It compiles fine on ARCH arm and arm64.
>
> Hi Gabriele,
>
> I manually apply this patch on my series, as there are some format
> errors
> about this patch. And I think this patch is a experimental one, it
> could not
> be compiled successfully.
>
> >
> > It needs to be tested.
> >
> > Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
> >
> > [...]
> >
> > -int dw_pcie_host_init(struct pcie_port *pp)
> > +int __init dw_pcie_host_init(struct pcie_port *pp)
> > {
> > struct device_node *np = pp->dev->of_node;
> > struct platform_device *pdev = to_platform_device(pp->dev);
> > - struct of_pci_range range;
> > - struct of_pci_range_parser parser;
> > + struct pci_bus *bus;
> > struct resource *cfg_res;
> > + LIST_HEAD(res);
> > u32 val, na, ns;
> > const __be32 *addrp;
> > int i, index, ret;
> > + int rlen;
> > + struct pci_host_bridge_window *win;
>
> This struct is not in latest kernel, I think you should use struct
> resource_entry.
>
> Thanks,
> Zhou
>
> > + const __be32 *parser_range_end = of_get_property(np, "ranges",
> &rlen);
> > +
> > + if (parser_range_end == NULL)
> > + return -ENOENT;
> > + parser_range_end += rlen/sizeof(__be32);
> > +
> >
> > /* Find the address cell size and the number of cells in order to
> get
> > * the untranslated address.
> > @@ -375,78 +375,67 @@ int dw_pcie_host_init(struct pcie_port *pp)
> > dev_err(pp->dev, "missing *config* reg space\n");
> > }
> >
> > - if (of_pci_range_parser_init(&parser, np)) {
> > - dev_err(pp->dev, "missing ranges property\n");
> > - return -EINVAL;
> > - }
> > + ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &pp-
> >io_base);
> > + if (ret)
> > + return ret;
> >
> > /* Get the I/O and memory ranges from DT */
> > - for_each_of_pci_range(&parser, &range) {
> > - unsigned long restype = range.flags & IORESOURCE_TYPE_BITS;
> > -
> > - if (restype == IORESOURCE_IO) {
> > - of_pci_range_to_resource(&range, np, &pp->io);
> > - pp->io.name = "I/O";
> > - pp->io.start = max_t(resource_size_t,
> > - PCIBIOS_MIN_IO,
> > - range.pci_addr + global_io_offset);
> > - pp->io.end = min_t(resource_size_t,
> > - IO_SPACE_LIMIT,
> > - range.pci_addr + range.size
> > - + global_io_offset - 1);
> > - pp->io_size = resource_size(&pp->io);
> > - pp->io_bus_addr = range.pci_addr;
> > - pp->io_base = range.cpu_addr;
> > -
> > - /* Find the untranslated IO space address */
> > - pp->io_mod_base = of_read_number(parser.range -
> > - parser.np + na, ns);
> > - }
> > - if (restype == IORESOURCE_MEM) {
> > - of_pci_range_to_resource(&range, np, &pp->mem);
> > - pp->mem.name = "MEM";
> > - pp->mem_size = resource_size(&pp->mem);
> > - pp->mem_bus_addr = range.pci_addr;
> > -
> > - /* Find the untranslated MEM space address */
> > - pp->mem_mod_base = of_read_number(parser.range -
> > - parser.np + na, ns);
> > - }
> > - if (restype == 0) {
> > - of_pci_range_to_resource(&range, np, &pp->cfg);
> > - pp->cfg0_size = resource_size(&pp->cfg)/2;
> > - pp->cfg1_size = resource_size(&pp->cfg)/2;
> > - pp->cfg0_base = pp->cfg.start;
> > - pp->cfg1_base = pp->cfg.start + pp->cfg0_size;
> > + list_for_each_entry(win, &res, list) {
> > + switch (resource_type(win->res)) {
> > + case IORESOURCE_IO:
> > + pp->io = win->res;
> > + pp->io->name = "I/O";
> > + pp->io_size = resource_size(pp->io);
> > + pp->io_bus_addr = pp->io->start - win->offset;
> > + /* magic 5 below comes from magic na and ns in
> > + * of_pci_range_parser_init() */
> > + pp->io_mod_base = of_read_number(parser_range_end -
> > + of_n_addr_cells(np) - 5 + na, ns);
> > + ret = pci_remap_iospace(pp->io, pp->io_base);
> > + if (ret) {
> > + dev_warn(pp->dev, "error %d: failed to map
> resource %pR\n",
> > + ret, pp->io);
> > + continue;
> > + }
> > + break;
> > + case IORESOURCE_MEM:
> > + pp->mem = win->res;
> > + pp->mem->name = "MEM";
> > + pp->mem_size = resource_size(pp->mem);
> > + pp->mem_bus_addr = pp->mem->start - win->offset;
> > + pp->mem_mod_base = of_read_number(parser_range_end -
> > + of_n_addr_cells(np) - 5 + na, ns);
> > + break;
> > + case 0:
> > + pp->cfg = win->res;
> > + pp->cfg0_size = resource_size(pp->cfg)/2;
> > + pp->cfg1_size = resource_size(pp->cfg)/2;
> > + pp->cfg0_base = pp->cfg->start;
> > + pp->cfg1_base = pp->cfg->start + pp->cfg0_size;
> >
> > /* Find the untranslated configuration space address
> */
> > - pp->cfg0_mod_base = of_read_number(parser.range -
> > - parser.np + na, ns);
> > - pp->cfg1_mod_base = pp->cfg0_mod_base +
> > - pp->cfg0_size;
> > + pp->cfg0_mod_base = of_read_number(parser_range_end -
> > + of_n_addr_cells(np) - 5 + na, ns);
> > + pp->cfg1_mod_base = pp->cfg0_mod_base + pp->cfg0_size;
> > + break;
> > + case IORESOURCE_BUS:
> > + pp->busn = win->res;
> > + break;
> > + default:
> > + continue;
> > }
> > }
> >
> > - ret = of_pci_parse_bus_range(np, &pp->busn);
> > - if (ret < 0) {
> > - pp->busn.name = np->name;
> > - pp->busn.start = 0;
> > - pp->busn.end = 0xff;
> > - pp->busn.flags = IORESOURCE_BUS;
> > - dev_dbg(pp->dev, "failed to parse bus-range property: %d,
> using default %pR\n",
> > - ret, &pp->busn);
> > - }
> > -
> > if (!pp->dbi_base) {
> > - pp->dbi_base = devm_ioremap(pp->dev, pp->cfg.start,
> > - resource_size(&pp->cfg));
> > + pp->dbi_base = devm_ioremap(pp->dev, pp->cfg->start,
> > + resource_size(pp->cfg));
> > if (!pp->dbi_base) {
> > dev_err(pp->dev, "error with ioremap\n");
> > return -ENOMEM;
> > }
> > }
> >
> > - pp->mem_base = pp->mem.start;
> > + pp->mem_base = pp->mem->start;
> >
> > if (!pp->va_cfg0_base) {
> > pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base, @@
> -493,24 +482,47 @@ int dw_pcie_host_init(struct pcie_port *pp)
> > if (pp->ops->host_init)
> > pp->ops->host_init(pp);
> >
> > - dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0);
> > + if (dw_pcie_wr_own_conf(pp, PCI_BASE_ADDRESS_0, 4, 0)
> > + != PCIBIOS_SUCCESSFUL)
> > + return -EINVAL;
> >
> > /* program correct class for RC */
> > - dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2,
> PCI_CLASS_BRIDGE_PCI);
> > + if (dw_pcie_wr_own_conf(pp, PCI_CLASS_DEVICE, 2,
> PCI_CLASS_BRIDGE_PCI)
> > + != PCIBIOS_SUCCESSFUL)
> > + return -EINVAL;
> > +
> > + if (dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4,
> &val)
> > + != PCIBIOS_SUCCESSFUL)
> > + return -EINVAL;
> >
> > - dw_pcie_rd_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, &val);
> > val |= PORT_LOGIC_SPEED_CHANGE;
> > - dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val);
> >
> > -#ifdef CONFIG_PCI_MSI
> > - dw_pcie_msi_chip.dev = pp->dev;
> > - dw_pci.msi_ctrl = &dw_pcie_msi_chip;
> > + if (dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4, val)
> > + != PCIBIOS_SUCCESSFUL)
> > + return -EINVAL;
> > +
> > + bus = pci_create_root_bus(pp->dev, pp->root_bus_nr, &dw_pcie_ops,
> > + pp, &res);
> > + if (!bus)
> > + return -ENOMEM;
> > +
> > +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
> > + bus->msi = container_of(&pp->irq_domain, struct msi_controller,
> > +domain); #else
> > + bus->msi = &dw_pcie_msi_chip;
> > #endif
> >
> > - dw_pci.nr_controllers = 1;
> > - dw_pci.private_data = (void **)&pp;
> > + pci_scan_child_bus(bus);
> > + if (pp->ops->scan_bus)
> > + pp->ops->scan_bus(pp);
> >
> > - pci_common_init_dev(pp->dev, &dw_pci);
> > +#ifdef CONFIG_ARM
> > + /* support old dtbs that incorrectly describe IRQs */
> > + pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
> #endif
> > +
> > + pci_assign_unassigned_bus_resources(bus);
> > + pci_bus_add_devices(bus);
> >
> > return 0;
> > }
> > @@ -653,7 +665,7 @@ static int dw_pcie_valid_config(struct pcie_port
> *pp, static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int
> where,
> > int size, u32 *val)
> > {
> > - struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> > + struct pcie_port *pp = bus->sysdata;
> > int ret;
> >
> > if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) { @@ -
> 677,7 +689,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32
> devfn, int where, static int dw_pcie_wr_conf(struct pci_bus *bus, u32
> devfn,
> > int where, int size, u32 val)
> > {
> > - struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> > + struct pcie_port *pp = bus->sysdata;
> > int ret;
> >
> > if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) @@ -
> 701,64 +713,6 @@ static struct pci_ops dw_pcie_ops = {
> > .write = dw_pcie_wr_conf,
> > };
> >
> > -static int dw_pcie_setup(int nr, struct pci_sys_data *sys) -{
> > - struct pcie_port *pp;
> > -
> > - pp = sys_to_pcie(sys);
> > -
> > - if (global_io_offset < SZ_1M && pp->io_size > 0) {
> > - sys->io_offset = global_io_offset - pp->io_bus_addr;
> > - pci_ioremap_io(global_io_offset, pp->io_base);
> > - global_io_offset += SZ_64K;
> > - pci_add_resource_offset(&sys->resources, &pp->io,
> > - sys->io_offset);
> > - }
> > -
> > - sys->mem_offset = pp->mem.start - pp->mem_bus_addr;
> > - pci_add_resource_offset(&sys->resources, &pp->mem, sys-
> >mem_offset);
> > - pci_add_resource(&sys->resources, &pp->busn);
> > -
> > - return 1;
> > -}
> > -
> > -static struct pci_bus *dw_pcie_scan_bus(int nr, struct pci_sys_data
> *sys) -{
> > - struct pci_bus *bus;
> > - struct pcie_port *pp = sys_to_pcie(sys);
> > -
> > - pp->root_bus_nr = sys->busnr;
> > - bus = pci_create_root_bus(pp->dev, sys->busnr,
> > - &dw_pcie_ops, sys, &sys->resources);
> > - if (!bus)
> > - return NULL;
> > -
> > - pci_scan_child_bus(bus);
> > -
> > - if (bus && pp->ops->scan_bus)
> > - pp->ops->scan_bus(pp);
> > -
> > - return bus;
> > -}
> > -
> > -static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8
> pin) -{
> > - struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
> > - int irq;
> > -
> > - irq = of_irq_parse_and_map_pci(dev, slot, pin);
> > - if (!irq)
> > - irq = pp->irq;
> > -
> > - return irq;
> > -}
> > -
> > -static struct hw_pci dw_pci = {
> > - .setup = dw_pcie_setup,
> > - .scan = dw_pcie_scan_bus,
> > - .map_irq = dw_pcie_map_irq,
> > -};
> > -
> > void dw_pcie_setup_rc(struct pcie_port *pp) {
> > u32 val;
> > diff --git a/drivers/pci/host/pcie-designware.h
> b/drivers/pci/host/pcie-designware.h
> > index d0bbd27..ab78710 100644
> > --- a/drivers/pci/host/pcie-designware.h
> > +++ b/drivers/pci/host/pcie-designware.h
> > @@ -34,7 +34,7 @@ struct pcie_port {
> > u64 cfg1_mod_base;
> > void __iomem *va_cfg1_base;
> > u32 cfg1_size;
> > - u64 io_base;
> > + resource_size_t io_base;
> > u64 io_mod_base;
> > phys_addr_t io_bus_addr;
> > u32 io_size;
> > @@ -42,10 +42,10 @@ struct pcie_port {
> > u64 mem_mod_base;
> > phys_addr_t mem_bus_addr;
> > u32 mem_size;
> > - struct resource cfg;
> > - struct resource io;
> > - struct resource mem;
> > - struct resource busn;
> > + struct resource *cfg;
> > + struct resource *io;
> > + struct resource *mem;
> > + struct resource *busn;
> > int irq;
> > u32 lanes;
> > struct pcie_host_ops *ops;
> > diff --git a/drivers/pci/host/pcie-spear13xx.c
> b/drivers/pci/host/pcie-spear13xx.c
> > index 020d788..e78ddf8 100644
> > --- a/drivers/pci/host/pcie-spear13xx.c
> > +++ b/drivers/pci/host/pcie-spear13xx.c
> > @@ -287,7 +287,7 @@ static int spear13xx_add_pcie_port(struct
> pcie_port *pp,
> > return ret;
> > }
> >
> > - pp->root_bus_nr = -1;
> > + pp->root_bus_nr = 0;
> > pp->ops = &spear13xx_pcie_host_ops;
> >
> > ret = dw_pcie_host_init(pp);
> > ------------------------------------
> > ------------------------------------
> >
> >
> >
> >
> >> -----Original Message-----
> >> From: Lorenzo Pieralisi [mailto:lorenzo.pieralisi at arm.com]
> >> Sent: Tuesday, June 09, 2015 12:15 PM
> >> To: Wangzhou (B)
> >> Cc: James Morse; Bjorn Helgaas; Jingoo Han; Pratyush Anand; Arnd
> >> Bergmann; fabrice.gasnier at st.com; Liviu Dudau; linux-
> >> pci at vger.kernel.org; linux-arm-kernel at lists.infradead.org;
> >> devicetree at vger.kernel.org; Gabriele Paoloni; Yuanzhichang; Zhudacai;
> >> zhangjukuo; qiuzhenfa; Liguozhu (Kenneth)
> >> Subject: Re: [PATCH v2 2/4] PCI: designware: Add ARM64 support
> >>
> >> On Fri, Jun 05, 2015 at 09:11:30AM +0100, Zhou Wang wrote:
> >>
> >> [...]
> >>
> >>>>> -int dw_pcie_host_init(struct pcie_port *pp)
> >>>>> +int __init dw_pcie_host_init(struct pcie_port *pp)
> >>>>> {
> >>>>> struct device_node *np = pp->dev->of_node;
> >>>>> struct platform_device *pdev = to_platform_device(pp->dev);
> >>>>> struct of_pci_range range;
> >>>>> struct of_pci_range_parser parser;
> >>>>> + struct pci_bus *bus;
> >>>>> struct resource *cfg_res;
> >>>>> + LIST_HEAD(res);
> >>>>> u32 val, na, ns;
> >>>>> const __be32 *addrp;
> >>>>> int i, index, ret;
> >>>>> @@ -502,15 +498,49 @@ int dw_pcie_host_init(struct pcie_port *pp)
> >>>>> val |= PORT_LOGIC_SPEED_CHANGE;
> >>>>> dw_pcie_wr_own_conf(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, 4,
> >> val);
> >>>>>
> >>>>> -#ifdef CONFIG_PCI_MSI
> >>>>> - dw_pcie_msi_chip.dev = pp->dev;
> >>>>> - dw_pci.msi_ctrl = &dw_pcie_msi_chip;
> >>>>> +#ifdef CONFIG_ARM
> >>>>> + /*
> >>>>> + * FIXME: we should really be able to use
> >>>>> + * of_pci_get_host_bridge_resources on arm32 as well,
> >>>>> + * but the conversion needs some more testing
> >>>>> + */
> >>>>> + if (global_io_offset < SZ_1M && pp->io_size > 0) {
> >>>>> + pci_ioremap_io(global_io_offset, pp->io_base);
> >>>>> + global_io_offset += SZ_64K;
> >>>>> + pci_add_resource_offset(&res, &pp->io,
> >>>>> + global_io_offset - pp->io_bus_addr);
> >>>>> + }
> >>>>> + pci_add_resource_offset(&res, &pp->mem,
> >>>>> + pp->mem.start - pp->mem_bus_addr);
> >>>>> + pci_add_resource(&res, &pp->busn);
> >>>>
> >>>> I don't think this #ifdef is necessary. In the spirit of 'the
> >>>> conversion needs some more testing', I removed it leaving just the
> >> below arm64 code.
> >>>>
> >>>> This worked on my Freescale i.MX6 Quad SABRE Lite Board, I went as
> >>>> far as scanning for wireless access points.
> >>>>
> >>>
> >>> I think it depends on which kind of PCIe device you use, if we use
> a
> >>> PCIe device with a I/O Bar, it may not work well without above code.
> >>> But so far, I have not met a PCIe device which must work with a I/O
> >> Bar.
> >>
> >> There are two problems here:
> >>
> >> 1) the io_base address you get from of_pci_get_host_bridge_resources
> >> must be mapped using pci_remap_iospace. You are not doing this,
> so
> >> even if you had a PCIe card with I/O bar it would not work on
> arm64
> >> as the code stands. Remember that I/O space on arm/arm64 works as
> a
> >> memory access with offset from PCI_IOBASE and that's the value
> you
> >> get
> >> in the I/O resource. See:
> >>
> >> drivers/pci/host/pci-host-generic.c
> >> drivers/pci/host/pci-versatile.c
> >> drivers/pci/host/pci-xgene.c
> >>
> >> 2) (1) above would sort out I/O space access for both arm and arm64
> so,
> >> as James said, the #ifdef is useless.
> >>
> >> I hope this makes things clearer.
> >>
> >> Thanks,
> >> Lorenzo
> >>
> >>>
> >>>>> +#else
> >>>>> + ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res,
> >>>>> +&pp->io_base);
> >>>>
> >>>> of_pci_get_host_bridge_resources expects &pp->io_base to be a
> >>>> resource_size_t*, but &io_base is u64*. This generates a warning
> on
> >>>> arm with the above change. Changing the the type in
> >>>> drivers/pci/host/pcie-designware.h fixes this.
> >>>>
> >>>>
> >>>> Thanks,
> >>>>
> >>>> James
> >>>>
> >>>
> >>> OK, will modify this in next version.
> >>>
> >>> Best Regards and thanks again for your test, Zhou
> >>>
> >>>>> + if (ret)
> >>>>> + return ret;
> >>>>> +#endif
> >>>>> +
> >>>>> + bus = pci_create_root_bus(pp->dev, pp->root_bus_nr,
> >> &dw_pcie_ops,
> >>>>> + pp, &res);
> >>>>> + if (!bus)
> >>>>> + return -ENOMEM;
> >>>>> +
> >>>>> +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
> >>>>> + bus->msi = container_of(&pp->irq_domain, struct
> >> msi_controller,
> >>>>> +domain); #else
> >>>>> + bus->msi = &dw_pcie_msi_chip;
> >>>>> #endif
> >>>>>
> >>>>> - dw_pci.nr_controllers = 1;
> >>>>> - dw_pci.private_data = (void **)&pp;
> >>>>> + pci_scan_child_bus(bus);
> >>>>> + if (pp->ops->scan_bus)
> >>>>> + pp->ops->scan_bus(pp);
> >>>>>
> >>>>> - pci_common_init_dev(pp->dev, &dw_pci);
> >>>>> +#ifdef CONFIG_ARM
> >>>>> + /* support old dtbs that incorrectly describe IRQs */
> >>>>> + pci_fixup_irqs(pci_common_swizzle,
> >> of_irq_parse_and_map_pci);
> >>>>> +#endif
> >>>>> +
> >>>>> + pci_assign_unassigned_bus_resources(bus);
> >>>>> + pci_bus_add_devices(bus);
> >>>>>
> >>>>> return 0;
> >>>>> }
> >>>>> @@ -653,7 +683,7 @@ static int dw_pcie_valid_config(struct
> >>>>> pcie_port *pp, static int dw_pcie_rd_conf(struct pci_bus *bus,
> >> u32 devfn, int where,
> >>>>> int size, u32 *val)
> >>>>> {
> >>>>> - struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> >>>>> + struct pcie_port *pp = bus->sysdata;
> >>>>> int ret;
> >>>>>
> >>>>> if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0)
> >> { @@
> >>>>> -677,7 +707,7 @@ static int dw_pcie_rd_conf(struct pci_bus *bus,
> >>>>> u32 devfn, int where, static int dw_pcie_wr_conf(struct pci_bus
> >> *bus, u32 devfn,
> >>>>> int where, int size, u32 val)
> >>>>> {
> >>>>> - struct pcie_port *pp = sys_to_pcie(bus->sysdata);
> >>>>> + struct pcie_port *pp = bus->sysdata;
> >>>>> int ret;
> >>>>>
> >>>>> if (dw_pcie_valid_config(pp, bus, PCI_SLOT(devfn)) == 0) @@
> >>>>> -701,64 +731,6 @@ static struct pci_ops dw_pcie_ops = {
> >>>>> .write = dw_pcie_wr_conf,
> >>>>> };
> >>>>>
> >>>>> -static int dw_pcie_setup(int nr, struct pci_sys_data *sys) -{
> >>>>> - struct pcie_port *pp;
> >>>>> -
> >>>>> - pp = sys_to_pcie(sys);
> >>>>> -
> >>>>> - if (global_io_offset < SZ_1M && pp->io_size > 0) {
> >>>>> - sys->io_offset = global_io_offset - pp->io_bus_addr;
> >>>>> - pci_ioremap_io(global_io_offset, pp->io_base);
> >>>>> - global_io_offset += SZ_64K;
> >>>>> - pci_add_resource_offset(&sys->resources, &pp->io,
> >>>>> - sys->io_offset);
> >>>>> - }
> >>>>> -
> >>>>> - sys->mem_offset = pp->mem.start - pp->mem_bus_addr;
> >>>>> - pci_add_resource_offset(&sys->resources, &pp->mem, sys-
> >>> mem_offset);
> >>>>> - pci_add_resource(&sys->resources, &pp->busn);
> >>>>> -
> >>>>> - return 1;
> >>>>> -}
> >>>>> -
> >>>>> -static struct pci_bus *dw_pcie_scan_bus(int nr, struct
> >>>>> pci_sys_data *sys) -{
> >>>>> - struct pci_bus *bus;
> >>>>> - struct pcie_port *pp = sys_to_pcie(sys);
> >>>>> -
> >>>>> - pp->root_bus_nr = sys->busnr;
> >>>>> - bus = pci_create_root_bus(pp->dev, sys->busnr,
> >>>>> - &dw_pcie_ops, sys, &sys->resources);
> >>>>> - if (!bus)
> >>>>> - return NULL;
> >>>>> -
> >>>>> - pci_scan_child_bus(bus);
> >>>>> -
> >>>>> - if (bus && pp->ops->scan_bus)
> >>>>> - pp->ops->scan_bus(pp);
> >>>>> -
> >>>>> - return bus;
> >>>>> -}
> >>>>> -
> >>>>> -static int dw_pcie_map_irq(const struct pci_dev *dev, u8 slot,
> u8
> >>>>> pin) -{
> >>>>> - struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata);
> >>>>> - int irq;
> >>>>> -
> >>>>> - irq = of_irq_parse_and_map_pci(dev, slot, pin);
> >>>>> - if (!irq)
> >>>>> - irq = pp->irq;
> >>>>> -
> >>>>> - return irq;
> >>>>> -}
> >>>>> -
> >>>>> -static struct hw_pci dw_pci = {
> >>>>> - .setup = dw_pcie_setup,
> >>>>> - .scan = dw_pcie_scan_bus,
> >>>>> - .map_irq = dw_pcie_map_irq,
> >>>>> -};
> >>>>> -
> >>>>> void dw_pcie_setup_rc(struct pcie_port *pp) {
> >>>>> u32 val;
> >>>>
> >>>>
> >>>> .
> >>>>
> >>>
> >>>
> >>> --
> >>> To unsubscribe from this list: send the line "unsubscribe linux-
> pci"
> >>> in the body of a message to majordomo at vger.kernel.org More
> majordomo
> >>> info at http://vger.kernel.org/majordomo-info.html
> >>>
> >
> > .
> >
>
More information about the linux-arm-kernel
mailing list