diff options
Diffstat (limited to 'arch/v850/kernel/rte_mb_a_pci.c')
| -rw-r--r-- | arch/v850/kernel/rte_mb_a_pci.c | 819 |
1 files changed, 0 insertions, 819 deletions
diff --git a/arch/v850/kernel/rte_mb_a_pci.c b/arch/v850/kernel/rte_mb_a_pci.c deleted file mode 100644 index 687e367d8b6..00000000000 --- a/arch/v850/kernel/rte_mb_a_pci.c +++ /dev/null @@ -1,819 +0,0 @@ -/* - * arch/v850/kernel/mb_a_pci.c -- PCI support for Midas lab RTE-MOTHER-A board - * - * Copyright (C) 2001,02,03,05 NEC Electronics Corporation - * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org> - * - * This file is subject to the terms and conditions of the GNU General - * Public License. See the file COPYING in the main directory of this - * archive for more details. - * - * Written by Miles Bader <miles@gnu.org> - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/pci.h> - -#include <asm/machdep.h> - -/* __nomods_init is like __devinit, but is a no-op when modules are enabled. - This is used by some routines that can be called either during boot - or by a module. */ -#ifdef CONFIG_MODULES -#define __nomods_init /*nothing*/ -#else -#define __nomods_init __devinit -#endif - -/* PCI devices on the Mother-A board can only do DMA to/from the MB SRAM - (the RTE-V850E/MA1-CB cpu board doesn't support PCI access to - CPU-board memory), and since linux DMA buffers are allocated in - normal kernel memory, we basically have to copy DMA blocks around - (this is like a `bounce buffer'). When a DMA block is `mapped', we - allocate an identically sized block in MB SRAM, and if we're doing - output to the device, copy the CPU-memory block to the MB-SRAM block. - When an active block is `unmapped', we will copy the block back to - CPU memory if necessary, and then deallocate the MB SRAM block. - Ack. */ - -/* Where the motherboard SRAM is in the PCI-bus address space (the - first 512K of it is also mapped at PCI address 0). */ -#define PCI_MB_SRAM_ADDR 0x800000 - -/* Convert CPU-view MB SRAM address to/from PCI-view addresses of the - same memory. */ -#define MB_SRAM_TO_PCI(mb_sram_addr) \ - ((dma_addr_t)mb_sram_addr - MB_A_SRAM_ADDR + PCI_MB_SRAM_ADDR) -#define PCI_TO_MB_SRAM(pci_addr) \ - (void *)(pci_addr - PCI_MB_SRAM_ADDR + MB_A_SRAM_ADDR) - -static void pcibios_assign_resources (void); - -struct mb_pci_dev_irq { - unsigned dev; /* PCI device number */ - unsigned irq_base; /* First IRQ */ - unsigned query_pin; /* True if we should read the device's - Interrupt Pin info, and allocate - interrupt IRQ_BASE + PIN. */ -}; - -/* PCI interrupts are mapped statically to GBUS interrupts. */ -static struct mb_pci_dev_irq mb_pci_dev_irqs[] = { - /* Motherboard SB82558 ethernet controller */ - { 10, IRQ_MB_A_LAN, 0 }, - /* PCI slot 1 */ - { 8, IRQ_MB_A_PCI1(0), 1 }, - /* PCI slot 2 */ - { 9, IRQ_MB_A_PCI2(0), 1 } -}; -#define NUM_MB_PCI_DEV_IRQS ARRAY_SIZE(mb_pci_dev_irqs) - - -/* PCI configuration primitives. */ - -#define CONFIG_DMCFGA(bus, devfn, offs) \ - (0x80000000 \ - | ((offs) & ~0x3) \ - | ((devfn) << 8) \ - | ((bus)->number << 16)) - -static int -mb_pci_read (struct pci_bus *bus, unsigned devfn, int offs, int size, u32 *rval) -{ - u32 addr; - int flags; - - local_irq_save (flags); - - MB_A_PCI_PCICR = 0x7; - MB_A_PCI_DMCFGA = CONFIG_DMCFGA (bus, devfn, offs); - - addr = MB_A_PCI_IO_ADDR + (offs & 0x3); - - switch (size) { - case 1: *rval = *(volatile u8 *)addr; break; - case 2: *rval = *(volatile u16 *)addr; break; - case 4: *rval = *(volatile u32 *)addr; break; - } - - if (MB_A_PCI_PCISR & 0x2000) { - MB_A_PCI_PCISR = 0x2000; - *rval = ~0; - } - - MB_A_PCI_DMCFGA = 0; - - local_irq_restore (flags); - - return PCIBIOS_SUCCESSFUL; -} - -static int -mb_pci_write (struct pci_bus *bus, unsigned devfn, int offs, int size, u32 val) -{ - u32 addr; - int flags; - - local_irq_save (flags); - - MB_A_PCI_PCICR = 0x7; - MB_A_PCI_DMCFGA = CONFIG_DMCFGA (bus, devfn, offs); - - addr = MB_A_PCI_IO_ADDR + (offs & 0x3); - - switch (size) { - case 1: *(volatile u8 *)addr = val; break; - case 2: *(volatile u16 *)addr = val; break; - case 4: *(volatile u32 *)addr = val; break; - } - - if (MB_A_PCI_PCISR & 0x2000) - MB_A_PCI_PCISR = 0x2000; - - MB_A_PCI_DMCFGA = 0; - - local_irq_restore (flags); - - return PCIBIOS_SUCCESSFUL; -} - -static struct pci_ops mb_pci_config_ops = { - .read = mb_pci_read, - .write = mb_pci_write, -}; - - -/* PCI Initialization. */ - -static struct pci_bus *mb_pci_bus = 0; - -/* Do initial PCI setup. */ -static int __devinit pcibios_init (void) -{ - u32 id = MB_A_PCI_PCIHIDR; - u16 vendor = id & 0xFFFF; - u16 device = (id >> 16) & 0xFFFF; - - if (vendor == PCI_VENDOR_ID_PLX && device == PCI_DEVICE_ID_PLX_9080) { - printk (KERN_INFO - "PCI: PLX Technology PCI9080 HOST/PCI bridge\n"); - - MB_A_PCI_PCICR = 0x147; - - MB_A_PCI_PCIBAR0 = 0x007FFF00; - MB_A_PCI_PCIBAR1 = 0x0000FF00; - MB_A_PCI_PCIBAR2 = 0x00800000; - - MB_A_PCI_PCILTR = 0x20; - - MB_A_PCI_PCIPBAM |= 0x3; - - MB_A_PCI_PCISR = ~0; /* Clear errors. */ - - /* Reprogram the motherboard's IO/config address space, - as we don't support the GCS7 address space that the - default uses. */ - - /* Significant address bits used for decoding PCI GCS5 space - accesses. */ - MB_A_PCI_DMRR = ~(MB_A_PCI_MEM_SIZE - 1); - - /* I don't understand this, but the SolutionGear example code - uses such an offset, and it doesn't work without it. XXX */ -#if GCS5_SIZE == 0x00800000 -#define GCS5_CFG_OFFS 0x00800000 -#else -#define GCS5_CFG_OFFS 0 -#endif - - /* Address bit values for matching. Note that we have to give - the address from the motherboard's point of view, which is - different than the CPU's. */ - /* PCI memory space. */ - MB_A_PCI_DMLBAM = GCS5_CFG_OFFS + 0x0; - /* PCI I/O space. */ - MB_A_PCI_DMLBAI = - GCS5_CFG_OFFS + (MB_A_PCI_IO_ADDR - GCS5_ADDR); - - mb_pci_bus = pci_scan_bus (0, &mb_pci_config_ops, 0); - - pcibios_assign_resources (); - } else - printk (KERN_ERR "PCI: HOST/PCI bridge not found\n"); - - return 0; -} - -subsys_initcall (pcibios_init); - -char __devinit *pcibios_setup (char *option) -{ - /* Don't handle any options. */ - return option; -} - - -int __nomods_init pcibios_enable_device (struct pci_dev *dev, int mask) -{ - u16 cmd, old_cmd; - int idx; - struct resource *r; - - pci_read_config_word(dev, PCI_COMMAND, &cmd); - old_cmd = cmd; - for (idx = 0; idx < 6; idx++) { - r = &dev->resource[idx]; - if (!r->start && r->end) { - printk(KERN_ERR "PCI: Device %s not available because " - "of resource collisions\n", pci_name(dev)); - return -EINVAL; - } - if (r->flags & IORESOURCE_IO) - cmd |= PCI_COMMAND_IO; - if (r->flags & IORESOURCE_MEM) - cmd |= PCI_COMMAND_MEMORY; - } - if (cmd != old_cmd) { - printk("PCI: Enabling device %s (%04x -> %04x)\n", - pci_name(dev), old_cmd, cmd); - pci_write_config_word(dev, PCI_COMMAND, cmd); - } - return 0; -} - - -/* Resource allocation. */ -static void __devinit pcibios_assign_resources (void) -{ - struct pci_dev *dev = NULL; - struct resource *r; - - for_each_pci_dev(dev) { - unsigned di_num; - unsigned class = dev->class >> 8; - - if (class && class != PCI_CLASS_BRIDGE_HOST) { - unsigned r_num; - for(r_num = 0; r_num < 6; r_num++) { - r = &dev->resource[r_num]; - if (!r->start && r->end) - pci_assign_resource (dev, r_num); - } - } - - /* Assign interrupts. */ - for (di_num = 0; di_num < NUM_MB_PCI_DEV_IRQS; di_num++) { - struct mb_pci_dev_irq *di = &mb_pci_dev_irqs[di_num]; - - if (di->dev == PCI_SLOT (dev->devfn)) { - unsigned irq = di->irq_base; - - if (di->query_pin) { - /* Find out which interrupt pin - this device uses (each PCI - slot has 4). */ - u8 irq_pin; - - pci_read_config_byte (dev, - PCI_INTERRUPT_PIN, - &irq_pin); - - if (irq_pin == 0) - /* Doesn't use interrupts. */ - continue; - else - irq += irq_pin - 1; - } - - pcibios_update_irq (dev, irq); - } - } - } -} - -void __devinit pcibios_update_irq (struct pci_dev *dev, int irq) -{ - dev->irq = irq; - pci_write_config_byte (dev, PCI_INTERRUPT_LINE, irq); -} - -void __devinit -pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, - struct resource *res) -{ - unsigned long offset = 0; - - if (res->flags & IORESOURCE_IO) { - offset = MB_A_PCI_IO_ADDR; - } else if (res->flags & IORESOURCE_MEM) { - offset = MB_A_PCI_MEM_ADDR; - } - - region->start = res->start - offset; - region->end = res->end - offset; -} - - -/* Stubs for things we don't use. */ - -/* Called after each bus is probed, but before its children are examined. */ -void pcibios_fixup_bus(struct pci_bus *b) -{ -} - -void -pcibios_align_resource (void *data, struct resource *res, - resource_size_t size, resource_size_t align) -{ -} - -void pcibios_set_master (struct pci_dev *dev) -{ -} - - -/* Mother-A SRAM memory allocation. This is a simple first-fit allocator. */ - -/* A memory free-list node. */ -struct mb_sram_free_area { - void *mem; - unsigned long size; - struct mb_sram_free_area *next; -}; - -/* The tail of the free-list, which starts out containing all the SRAM. */ -static struct mb_sram_free_area mb_sram_free_tail = { - (void *)MB_A_SRAM_ADDR, MB_A_SRAM_SIZE, 0 -}; - -/* The free-list. */ -static struct mb_sram_free_area *mb_sram_free_areas = &mb_sram_free_tail; - -/* The free-list of free free-list nodes. (:-) */ -static struct mb_sram_free_area *mb_sram_free_free_areas = 0; - -/* Spinlock protecting the above globals. */ -static DEFINE_SPINLOCK(mb_sram_lock); - -/* Allocate a memory block at least SIZE bytes long in the Mother-A SRAM - space. */ -static void *alloc_mb_sram (size_t size) -{ - struct mb_sram_free_area *prev, *fa; - unsigned long flags; - void *mem = 0; - - spin_lock_irqsave (mb_sram_lock, flags); - - /* Look for a free area that can contain SIZE bytes. */ - for (prev = 0, fa = mb_sram_free_areas; fa; prev = fa, fa = fa->next) - if (fa->size >= size) { - /* Found one! */ - mem = fa->mem; - - if (fa->size == size) { - /* In fact, it fits exactly, so remove - this node from the free-list. */ - if (prev) - prev->next = fa->next; - else - mb_sram_free_areas = fa->next; - /* Put it on the free-list-entry-free-list. */ - fa->next = mb_sram_free_free_areas; - mb_sram_free_free_areas = fa; - } else { - /* FA is bigger than SIZE, so just - reduce its size to account for this - allocation. */ - fa->mem += size; - fa->size -= size; - } - - break; - } - - spin_unlock_irqrestore (mb_sram_lock, flags); - - return mem; -} - -/* Return the memory area MEM of size SIZE to the MB SRAM free pool. */ -static void free_mb_sram (void *mem, size_t size) -{ - struct mb_sram_free_area *prev, *fa, *new_fa; - unsigned long flags; - void *end = mem + size; - - spin_lock_irqsave (mb_sram_lock, flags); - - retry: - /* Find an adjacent free-list entry. */ - for (prev = 0, fa = mb_sram_free_areas; fa; prev = fa, fa = fa->next) - if (fa->mem == end) { - /* FA is just after MEM, grow down to encompass it. */ - fa->mem = mem; - fa->size += size; - goto done; - } else if (fa->mem + fa->size == mem) { - struct mb_sram_free_area *next_fa = fa->next; - - /* FA is just before MEM, expand to encompass it. */ - fa->size += size; - - /* See if FA can now be merged with its successor. */ - if (next_fa && fa->mem + fa->size == next_fa->mem) { - /* Yup; merge NEXT_FA's info into FA. */ - fa->size += next_fa->size; - fa->next = next_fa->next; - /* Free NEXT_FA. */ - next_fa->next = mb_sram_free_free_areas; - mb_sram_free_free_areas = next_fa; - } - goto done; - } else if (fa->mem > mem) - /* We've reached the right spot in the free-list - without finding an adjacent free-area, so add - a new free area to hold mem. */ - break; - - /* Make a new free-list entry. */ - - /* First, get a free-list entry. */ - if (! mb_sram_free_free_areas) { - /* There are none, so make some. */ - void *block; - size_t block_size = sizeof (struct mb_sram_free_area) * 8; - - /* Don't hold the lock while calling kmalloc (I'm not - sure whether it would be a problem, since we use - GFP_ATOMIC, but it makes me nervous). */ - spin_unlock_irqrestore (mb_sram_lock, flags); - - block = kmalloc (block_size, GFP_ATOMIC); - if (! block) - panic ("free_mb_sram: can't allocate free-list entry"); - - /* Now get the lock back. */ - spin_lock_irqsave (mb_sram_lock, flags); - - /* Add the new free free-list entries. */ - while (block_size > 0) { - struct mb_sram_free_area *nfa = block; - nfa->next = mb_sram_free_free_areas; - mb_sram_free_free_areas = nfa; - block += sizeof *nfa; - block_size -= sizeof *nfa; - } - - /* Since we dropped the lock to call kmalloc, the - free-list could have changed, so retry from the - beginning. */ - goto retry; - } - - /* Remove NEW_FA from the free-list of free-list entries. */ - new_fa = mb_sram_free_free_areas; - mb_sram_free_free_areas = new_fa->next; - - /* NEW_FA initially holds only MEM. */ - new_fa->mem = mem; - new_fa->size = size; - - /* Insert NEW_FA in the free-list between PREV and FA. */ - new_fa->next = fa; - if (prev) - prev->next = new_fa; - else - mb_sram_free_areas = new_fa; - - done: - spin_unlock_irqrestore (mb_sram_lock, flags); -} - - -/* Maintainence of CPU -> Mother-A DMA mappings. */ - -struct dma_mapping { - void *cpu_addr; - void *mb_sram_addr; - size_t size; - struct dma_mapping *next; -}; - -/* A list of mappings from CPU addresses to MB SRAM addresses for active - DMA blocks (that have been `granted' to the PCI device). */ -static struct dma_mapping *active_dma_mappings = 0; - -/* A list of free mapping objects. */ -static struct dma_mapping *free_dma_mappings = 0; - -/* Spinlock protecting the above globals. */ -static DEFINE_SPINLOCK(dma_mappings_lock); - -static struct dma_mapping *new_dma_mapping (size_t size) -{ - unsigned long flags; - struct dma_mapping *mapping; - void *mb_sram_block = alloc_mb_sram (size); - - if (! mb_sram_block) - return 0; - - spin_lock_irqsave (dma_mappings_lock, flags); - - if (! free_dma_mappings) { - /* We're out of mapping structures, make more. */ - void *mblock; - size_t mblock_size = sizeof (struct dma_mapping) * 8; - - /* Don't hold the lock while calling kmalloc (I'm not - sure whether it would be a problem, since we use - GFP_ATOMIC, but it makes me nervous). */ - spin_unlock_irqrestore (dma_mappings_lock, flags); - - mblock = kmalloc (mblock_size, GFP_ATOMIC); - if (! mblock) { - free_mb_sram (mb_sram_block, size); - return 0; - } - - /* Get the lock back. */ - spin_lock_irqsave (dma_mappings_lock, flags); - - /* Add the new mapping structures to the free-list. */ - while (mblock_size > 0) { - struct dma_mapping *fm = mblock; - fm->next = free_dma_mappings; - free_dma_mappings = fm; - mblock += sizeof *fm; - mblock_size -= sizeof *fm; - } - } - - /* Get a mapping struct from the freelist. */ - mapping = free_dma_mappings; - free_dma_mappings = mapping->next; - - /* Initialize the mapping. Other fields should be filled in by - caller. */ - mapping->mb_sram_addr = mb_sram_block; - mapping->size = size; - - /* Add it to the list of active mappings. */ - mapping->next = active_dma_mappings; - active_dma_mappings = mapping; - - spin_unlock_irqrestore (dma_mappings_lock, flags); - - return mapping; -} - -static struct dma_mapping *find_dma_mapping (void *mb_sram_addr) -{ - unsigned long flags; - struct dma_mapping *mapping; - - spin_lock_irqsave (dma_mappings_lock, flags); - - for (mapping = active_dma_mappings; mapping; mapping = mapping->next) - if (mapping->mb_sram_addr == mb_sram_addr) { - spin_unlock_irqrestore (dma_mappings_lock, flags); - return mapping; - } - - panic ("find_dma_mapping: unmapped PCI DMA addr 0x%x", - MB_SRAM_TO_PCI (mb_sram_addr)); -} - -static struct dma_mapping *deactivate_dma_mapping (void *mb_sram_addr) -{ - unsigned long flags; - struct dma_mapping *mapping, *prev; - - spin_lock_irqsave (dma_mappings_lock, flags); - - for (prev = 0, mapping = active_dma_mappings; - mapping; - prev = mapping, mapping = mapping->next) - { - if (mapping->mb_sram_addr == mb_sram_addr) { - /* This is the MAPPING; deactivate it. */ - if (prev) - prev->next = mapping->next; - else - active_dma_mappings = mapping->next; - - spin_unlock_irqrestore (dma_mappings_lock, flags); - - return mapping; - } - } - - panic ("deactivate_dma_mapping: unmapped PCI DMA addr 0x%x", - MB_SRAM_TO_PCI (mb_sram_addr)); -} - -/* Return MAPPING to the freelist. */ -static inline void -free_dma_mapping (struct dma_mapping *mapping) -{ - unsigned long flags; - - free_mb_sram (mapping->mb_sram_addr, mapping->size); - - spin_lock_irqsave (dma_mappings_lock, flags); - - mapping->next = free_dma_mappings; - free_dma_mappings = mapping; - - spin_unlock_irqrestore (dma_mappings_lock, flags); -} - - -/* Single PCI DMA mappings. */ - -/* `Grant' to PDEV the memory block at CPU_ADDR, for doing DMA. The - 32-bit PCI bus mastering address to use is returned. the device owns - this memory until either pci_unmap_single or pci_dma_sync_single is - performed. */ -dma_addr_t -pci_map_single (struct pci_dev *pdev, void *cpu_addr, size_t size, int dir) -{ - struct dma_mapping *mapping = new_dma_mapping (size); - - if (! mapping) - return 0; - - mapping->cpu_addr = cpu_addr; - - if (dir == PCI_DMA_BIDIRECTIONAL || dir == PCI_DMA_TODEVICE) - memcpy (mapping->mb_sram_addr, cpu_addr, size); - - return MB_SRAM_TO_PCI (mapping->mb_sram_addr); -} - -/* Return to the CPU the PCI DMA memory block previously `granted' to - PDEV, at DMA_ADDR. */ -void pci_unmap_single (struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, - int dir) -{ - void *mb_sram_addr = PCI_TO_MB_SRAM (dma_addr); - struct dma_mapping *mapping = deactivate_dma_mapping (mb_sram_addr); - - if (size != mapping->size) - panic ("pci_unmap_single: size (%d) doesn't match" - " size of mapping at PCI DMA addr 0x%x (%d)\n", - size, dma_addr, mapping->size); - - /* Copy back the DMA'd contents if necessary. */ - if (dir == PCI_DMA_BIDIRECTIONAL || dir == PCI_DMA_FROMDEVICE) - memcpy (mapping->cpu_addr, mb_sram_addr, size); - - /* Return mapping to the freelist. */ - free_dma_mapping (mapping); -} - -/* Make physical memory consistent for a single streaming mode DMA - translation after a transfer. - - If you perform a pci_map_single() but wish to interrogate the - buffer using the cpu, yet do not wish to teardown the PCI dma - mapping, you must call this function before doing so. At the next - point you give the PCI dma address back to the card, you must first - perform a pci_dma_sync_for_device, and then the device again owns - the buffer. */ -void -pci_dma_sync_single_for_cpu (struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, - int dir) -{ - void *mb_sram_addr = PCI_TO_MB_SRAM (dma_addr); - struct dma_mapping *mapping = find_dma_mapping (mb_sram_addr); - - /* Synchronize the DMA buffer with the CPU buffer if necessary. */ - if (dir == PCI_DMA_FROMDEVICE) - memcpy (mapping->cpu_addr, mb_sram_addr, size); - else if (dir == PCI_DMA_TODEVICE) - ; /* nothing to do */ - else - panic("pci_dma_sync_single: unsupported sync dir: %d", dir); -} - -void -pci_dma_sync_single_for_device (struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, - int dir) -{ - void *mb_sram_addr = PCI_TO_MB_SRAM (dma_addr); - struct dma_mapping *mapping = find_dma_mapping (mb_sram_addr); - - /* Synchronize the DMA buffer with the CPU buffer if necessary. */ - if (dir == PCI_DMA_FROMDEVICE) - ; /* nothing to do */ - else if (dir == PCI_DMA_TODEVICE) - memcpy (mb_sram_addr, mapping->cpu_addr, size); - else - panic("pci_dma_sync_single: unsupported sync dir: %d", dir); -} - - -/* Scatter-gather PCI DMA mappings. */ - -/* Do multiple DMA mappings at once. */ -int -pci_map_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len, int dir) -{ - BUG (); - return 0; -} - -/* Unmap multiple DMA mappings at once. */ -void -pci_unmap_sg (struct pci_dev *pdev, struct scatterlist *sg, int sg_len,int dir) -{ - BUG (); -} - -/* Make physical memory consistent for a set of streaming mode DMA - translations after a transfer. The same as pci_dma_sync_single_* but - for a scatter-gather list, same rules and usage. */ - -void -pci_dma_sync_sg_for_cpu (struct pci_dev *dev, - struct scatterlist *sg, int sg_len, - int dir) -{ - BUG (); -} - -void -pci_dma_sync_sg_for_device (struct pci_dev *dev, - struct scatterlist *sg, int sg_len, - int dir) -{ - BUG (); -} - - -/* PCI mem mapping. */ - -/* Allocate and map kernel buffer using consistent mode DMA for PCI - device. Returns non-NULL cpu-view pointer to the buffer if - successful and sets *DMA_ADDR to the pci side dma address as well, - else DMA_ADDR is undefined. */ -void * -pci_alloc_consistent (struct pci_dev *pdev, size_t size, dma_addr_t *dma_addr) -{ - void *mb_sram_mem = alloc_mb_sram (size); - if (mb_sram_mem) - *dma_addr = MB_SRAM_TO_PCI (mb_sram_mem); - return mb_sram_mem; -} - -/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must - be values that were returned from pci_alloc_consistent. SIZE must be - the same as what as passed into pci_alloc_consistent. References to - the memory and mappings associated with CPU_ADDR or DMA_ADDR past - this call are illegal. */ -void -pci_free_consistent (struct pci_dev *pdev, size_t size, void *cpu_addr, - dma_addr_t dma_addr) -{ - void *mb_sram_mem = PCI_TO_MB_SRAM (dma_addr); - free_mb_sram (mb_sram_mem, size); -} - - -/* iomap/iomap */ - -void __iomem *pci_iomap (struct pci_dev *dev, int bar, unsigned long max) -{ - resource_size_t start = pci_resource_start (dev, bar); - resource_size_t len = pci_resource_len (dev, bar); - - if (!start || len == 0) - return 0; - - /* None of the ioremap functions actually do anything, other than - re-casting their argument, so don't bother differentiating them. */ - return ioremap (start, len); -} - -void pci_iounmap (struct pci_dev *dev, void __iomem *addr) -{ - /* nothing */ -} - - -/* symbol exports (for modules) */ - -EXPORT_SYMBOL (pci_map_single); -EXPORT_SYMBOL (pci_unmap_single); -EXPORT_SYMBOL (pci_alloc_consistent); -EXPORT_SYMBOL (pci_free_consistent); -EXPORT_SYMBOL (pci_dma_sync_single_for_cpu); -EXPORT_SYMBOL (pci_dma_sync_single_for_device); -EXPORT_SYMBOL (pci_iomap); -EXPORT_SYMBOL (pci_iounmap); |