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Message-Id: <20160618022501.15648-3-yinghai@kernel.org>
Date: Fri, 17 Jun 2016 19:24:47 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
David Miller <davem@...emloft.net>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Wei Yang <weiyang@...ux.vnet.ibm.com>,
Khalid Aziz <khalid.aziz@...cle.com>,
linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
Yinghai Lu <yinghai@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org
Subject: [PATCH v13 02/16] PCI: Remove __pci_mmap_make_offset()
After
PCI: Let pci_mmap_page_range() take resource address
No user for __pci_mmap_make_offset in those arch.
Remove them.
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: sparclinux@...r.kernel.org
Cc: linux-xtensa@...ux-xtensa.org
---
arch/microblaze/pci/pci-common.c | 63 ----------------------
arch/powerpc/kernel/pci-common.c | 63 ----------------------
arch/sparc/kernel/pci.c | 113 ---------------------------------------
arch/xtensa/kernel/pci.c | 62 ---------------------
4 files changed, 301 deletions(-)
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 9e3bc05..e7cd0ab 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -156,69 +156,6 @@ void pcibios_set_master(struct pci_dev *dev)
*/
/*
- * Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
- resource_size_t *offset,
- enum pci_mmap_state mmap_state)
-{
- struct pci_controller *hose = pci_bus_to_host(dev->bus);
- unsigned long io_offset = 0;
- int i, res_bit;
-
- if (!hose)
- return NULL; /* should never happen */
-
- /* If memory, add on the PCI bridge address offset */
- if (mmap_state == pci_mmap_mem) {
-#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
- *offset += hose->pci_mem_offset;
-#endif
- res_bit = IORESOURCE_MEM;
- } else {
- io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
- *offset += io_offset;
- res_bit = IORESOURCE_IO;
- }
-
- /*
- * Check that the offset requested corresponds to one of the
- * resources of the device.
- */
- for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
- struct resource *rp = &dev->resource[i];
- int flags = rp->flags;
-
- /* treat ROM as memory (should be already) */
- if (i == PCI_ROM_RESOURCE)
- flags |= IORESOURCE_MEM;
-
- /* Active and same type? */
- if ((flags & res_bit) == 0)
- continue;
-
- /* In the range of this resource? */
- if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
- continue;
-
- /* found it! construct the final physical address */
- if (mmap_state == pci_mmap_io)
- *offset += hose->io_base_phys - io_offset;
- return rp;
- }
-
- return NULL;
-}
-
-/*
* This one is used by /dev/mem and fbdev who have no clue about the
* PCI device, it tries to find the PCI device first and calls the
* above routine
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 53ba098..14c183d 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -293,69 +293,6 @@ static int pci_read_irq_line(struct pci_dev *pci_dev)
*/
/*
- * Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
- resource_size_t *offset,
- enum pci_mmap_state mmap_state)
-{
- struct pci_controller *hose = pci_bus_to_host(dev->bus);
- unsigned long io_offset = 0;
- int i, res_bit;
-
- if (hose == NULL)
- return NULL; /* should never happen */
-
- /* If memory, add on the PCI bridge address offset */
- if (mmap_state == pci_mmap_mem) {
-#if 0 /* See comment in pci_resource_to_user() for why this is disabled */
- *offset += hose->pci_mem_offset;
-#endif
- res_bit = IORESOURCE_MEM;
- } else {
- io_offset = (unsigned long)hose->io_base_virt - _IO_BASE;
- *offset += io_offset;
- res_bit = IORESOURCE_IO;
- }
-
- /*
- * Check that the offset requested corresponds to one of the
- * resources of the device.
- */
- for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
- struct resource *rp = &dev->resource[i];
- int flags = rp->flags;
-
- /* treat ROM as memory (should be already) */
- if (i == PCI_ROM_RESOURCE)
- flags |= IORESOURCE_MEM;
-
- /* Active and same type? */
- if ((flags & res_bit) == 0)
- continue;
-
- /* In the range of this resource? */
- if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
- continue;
-
- /* found it! construct the final physical address */
- if (mmap_state == pci_mmap_io)
- *offset += hose->io_base_phys - io_offset;
- return rp;
- }
-
- return NULL;
-}
-
-/*
* This one is used by /dev/mem and fbdev who have no clue about the
* PCI device, it tries to find the PCI device first and calls the
* above routine
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 5f2d78e..c7d2ce6 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -732,119 +732,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
/* Platform support for /proc/bus/pci/X/Y mmap()s. */
-/* If the user uses a host-bridge as the PCI device, he may use
- * this to perform a raw mmap() of the I/O or MEM space behind
- * that controller.
- *
- * This can be useful for execution of x86 PCI bios initialization code
- * on a PCI card, like the xfree86 int10 stuff does.
- */
-static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
-{
- struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller;
- unsigned long space_size, user_offset, user_size;
-
- if (mmap_state == pci_mmap_io) {
- space_size = resource_size(&pbm->io_space);
- } else {
- space_size = resource_size(&pbm->mem_space);
- }
-
- /* Make sure the request is in range. */
- user_offset = vma->vm_pgoff << PAGE_SHIFT;
- user_size = vma->vm_end - vma->vm_start;
-
- if (user_offset >= space_size ||
- (user_offset + user_size) > space_size)
- return -EINVAL;
-
- if (mmap_state == pci_mmap_io) {
- vma->vm_pgoff = (pbm->io_space.start +
- user_offset) >> PAGE_SHIFT;
- } else {
- vma->vm_pgoff = (pbm->mem_space.start +
- user_offset) >> PAGE_SHIFT;
- }
-
- return 0;
-}
-
-/* Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static int __pci_mmap_make_offset(struct pci_dev *pdev,
- struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
-{
- unsigned long user_paddr, user_size;
- int i, err;
-
- /* First compute the physical address in vma->vm_pgoff,
- * making sure the user offset is within range in the
- * appropriate PCI space.
- */
- err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
- if (err)
- return err;
-
- /* If this is a mapping on a host bridge, any address
- * is OK.
- */
- if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
- return err;
-
- /* Otherwise make sure it's in the range for one of the
- * device's resources.
- */
- user_paddr = vma->vm_pgoff << PAGE_SHIFT;
- user_size = vma->vm_end - vma->vm_start;
-
- for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
- struct resource *rp = &pdev->resource[i];
- resource_size_t aligned_end;
-
- /* Active? */
- if (!rp->flags)
- continue;
-
- /* Same type? */
- if (i == PCI_ROM_RESOURCE) {
- if (mmap_state != pci_mmap_mem)
- continue;
- } else {
- if ((mmap_state == pci_mmap_io &&
- (rp->flags & IORESOURCE_IO) == 0) ||
- (mmap_state == pci_mmap_mem &&
- (rp->flags & IORESOURCE_MEM) == 0))
- continue;
- }
-
- /* Align the resource end to the next page address.
- * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1),
- * because actually we need the address of the next byte
- * after rp->end.
- */
- aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK;
-
- if ((rp->start <= user_paddr) &&
- (user_paddr + user_size) <= aligned_end)
- break;
- }
-
- if (i > PCI_ROM_RESOURCE)
- return -EINVAL;
-
- return 0;
-}
-
/* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
* device mapping.
*/
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 4c5f1fa..97ad3dd 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -272,68 +272,6 @@ pci_controller_num(struct pci_dev *dev)
*/
/*
- * Adjust vm_pgoff of VMA such that it is the physical page offset
- * corresponding to the 32-bit pci bus offset for DEV requested by the user.
- *
- * Basically, the user finds the base address for his device which he wishes
- * to mmap. They read the 32-bit value from the config space base register,
- * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
- * offset parameter of mmap on /proc/bus/pci/XXX for that device.
- *
- * Returns negative error code on failure, zero on success.
- */
-static __inline__ int
-__pci_mmap_make_offset(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state)
-{
- struct pci_controller *pci_ctrl = (struct pci_controller*) dev->sysdata;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long io_offset = 0;
- int i, res_bit;
-
- if (pci_ctrl == 0)
- return -EINVAL; /* should never happen */
-
- /* If memory, add on the PCI bridge address offset */
- if (mmap_state == pci_mmap_mem) {
- res_bit = IORESOURCE_MEM;
- } else {
- io_offset = (unsigned long)pci_ctrl->io_space.base;
- offset += io_offset;
- res_bit = IORESOURCE_IO;
- }
-
- /*
- * Check that the offset requested corresponds to one of the
- * resources of the device.
- */
- for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
- struct resource *rp = &dev->resource[i];
- int flags = rp->flags;
-
- /* treat ROM as memory (should be already) */
- if (i == PCI_ROM_RESOURCE)
- flags |= IORESOURCE_MEM;
-
- /* Active and same type? */
- if ((flags & res_bit) == 0)
- continue;
-
- /* In the range of this resource? */
- if (offset < (rp->start & PAGE_MASK) || offset > rp->end)
- continue;
-
- /* found it! construct the final physical address */
- if (mmap_state == pci_mmap_io)
- offset += pci_ctrl->io_space.start - io_offset;
- vma->vm_pgoff = offset >> PAGE_SHIFT;
- return 0;
- }
-
- return -EINVAL;
-}
-
-/*
* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
* device mapping.
*/
--
2.8.3
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