From: Niklas Cassel <niklas.cassel@axis.com>
To: kishon@ti.com, cyrille.pitchen@free-electrons.com,
Alan Douglas <adouglas@cadence.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Jingoo Han <jingoohan1@gmail.com>,
Joao Pinto <Joao.Pinto@synopsys.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Sekhar Nori <nsekhar@ti.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Shawn Lin <shawn.lin@rock-chips.com>,
Niklas Cassel <niklass@axis.com>,
John Keeping <john@metanate.com>
Cc: Niklas Cassel <niklass@axis.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 02/12] PCI: endpoint: Simplify epc->ops->set_bar()/pci_epc_set_bar()
Date: Wed, 28 Mar 2018 13:50:07 +0200 [thread overview]
Message-ID: <20180328115018.31921-3-niklas.cassel@axis.com> (raw)
In-Reply-To: <20180328115018.31921-1-niklas.cassel@axis.com>
Add barno and flags to struct epf_bar.
That way we can simplify epc->ops->set_bar()/pci_epc_set_bar()
by passing a struct *epf_bar instead of a whole lot of arguments.
This is needed so that epc->ops->set_bar() implementations can
modify BAR flags. Will be utilized in a succeeding patch.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
It is not trivial to convert the bar_size + bar_flags +
struct pci_epf->bar member array to an array of struct resources,
since we need to be able to store the addresses returned
by dma_alloc_coherent(), which is of type dma_addr_t.
struct resource uses resource_size_t, which is defined as phys_addr_t.
E.g. ARTPEC-7 uses 64-bit dma_addr_t, but only 32-bit phys_addr_t.
drivers/pci/cadence/pcie-cadence-ep.c | 9 ++++++---
drivers/pci/dwc/pcie-designware-ep.c | 8 +++++---
drivers/pci/endpoint/functions/pci-epf-test.c | 8 ++------
drivers/pci/endpoint/pci-epc-core.c | 10 ++++------
drivers/pci/endpoint/pci-epf-core.c | 4 ++++
include/linux/pci-epc.h | 6 ++----
include/linux/pci-epf.h | 2 ++
7 files changed, 25 insertions(+), 22 deletions(-)
diff --git a/drivers/pci/cadence/pcie-cadence-ep.c b/drivers/pci/cadence/pcie-cadence-ep.c
index 3c3a97743453..cef36cd6b710 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.
diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c
index 9236b998327f..5a0bb53c795c 100644
--- a/drivers/pci/dwc/pcie-designware-ep.c
+++ b/drivers/pci/dwc/pcie-designware-ep.c
@@ -117,12 +117,14 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
}
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);
@@ -131,7 +133,7 @@ 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;
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index f6c0c59b1bc8..91274779e59f 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -358,7 +358,6 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
static int pci_epf_test_set_bar(struct pci_epf *epf)
{
- int flags;
int bar;
int ret;
struct pci_epf_bar *epf_bar;
@@ -370,14 +369,11 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
for (bar = BAR_0; bar <= BAR_5; bar++) {
epf_bar = &epf->bar[bar];
- flags = PCI_BASE_ADDRESS_SPACE_MEMORY;
- flags |= upper_32_bits(epf_bar->size) ?
+ 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, bar,
- epf_bar->phys_addr,
- epf_bar->size, flags);
+ 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);
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index e245bba0ab53..784e33d6f229 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -300,14 +300,12 @@ 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;
@@ -319,7 +317,7 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, enum pci_barno 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 59ed29e550e9..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;
}
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index a1a5e5df0f66..75bae8aabbf9 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -39,8 +39,7 @@ 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);
int (*map_addr)(struct pci_epc *epc, u8 func_no,
@@ -127,8 +126,7 @@ 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);
+ struct pci_epf_bar *epf_bar);
void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar);
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr,
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;
};
/**
--
2.14.2
next prev parent reply other threads:[~2018-03-28 11:50 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-28 11:50 [PATCH v5 00/12] PCI endpoint 64-bit BAR fixes Niklas Cassel
2018-03-28 11:50 ` [PATCH v5 01/12] PCI: endpoint: BAR width should not depend on sizeof dma_addr_t Niklas Cassel
2018-03-29 9:35 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` Niklas Cassel [this message]
2018-03-28 13:12 ` [PATCH v5 02/12] PCI: endpoint: Simplify epc->ops->set_bar()/pci_epc_set_bar() Gustavo Pimentel
2018-03-29 9:36 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 03/12] PCI: endpoint: Setting BAR_5 to 64-bits wide is invalid Niklas Cassel
2018-03-29 9:40 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 04/12] PCI: endpoint: Setting 64-bit/prefetch bit is invalid when IO is set Niklas Cassel
2018-03-29 9:42 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 05/12] PCI: endpoint: Setting a BAR size > 4 GB is invalid if 64-bit flag is not set Niklas Cassel
2018-03-29 9:42 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 06/12] PCI: designware-ep: Make dw_pcie_ep_set_bar() handle 64-bit BARs properly Niklas Cassel
2018-03-28 13:13 ` Gustavo Pimentel
2018-03-29 9:47 ` Kishon Vijay Abraham I
2018-04-02 19:37 ` Niklas Cassel
2018-04-03 5:39 ` Kishon Vijay Abraham I
2018-04-03 12:53 ` Lorenzo Pieralisi
2018-04-03 14:03 ` Niklas Cassel
2018-03-28 11:50 ` [PATCH v5 07/12] PCI: cadence: Set PCI_BASE_ADDRESS_MEM_TYPE_64 if a 64-bit BAR was set-up Niklas Cassel
2018-03-28 13:24 ` Alan Douglas
2018-03-28 19:37 ` Bjorn Helgaas
2018-03-29 16:49 ` Alan Douglas
2018-03-28 11:50 ` [PATCH v5 08/12] PCI: endpoint: Handle 64-bit BARs properly Niklas Cassel
2018-03-29 9:50 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 09/12] PCI: endpoint: Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar Niklas Cassel
2018-03-28 13:14 ` Gustavo Pimentel
2018-03-29 10:00 ` Kishon Vijay Abraham I
2018-04-02 18:47 ` Niklas Cassel
2018-03-28 11:50 ` [PATCH v5 10/12] PCI: endpoint: Make sure that BAR_5 does not have 64-bit flag set when clearing Niklas Cassel
2018-03-29 10:02 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 11/12] PCI: designware-ep: Make dw_pcie_ep_reset_bar() handle 64-bit BARs properly Niklas Cassel
2018-03-28 13:14 ` Gustavo Pimentel
2018-03-29 10:03 ` Kishon Vijay Abraham I
2018-03-28 11:50 ` [PATCH v5 12/12] misc: pci_endpoint_test: Handle " Niklas Cassel
2018-03-29 13:52 ` [PATCH v5 00/12] PCI endpoint 64-bit BAR fixes Gustavo Pimentel
2018-04-02 19:39 ` Niklas Cassel
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