diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet-mem.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet-mem.c | 124 |
1 files changed, 51 insertions, 73 deletions
diff --git a/drivers/staging/octeon/ethernet-mem.c b/drivers/staging/octeon/ethernet-mem.c index b595903e2af1..00cc91df6b46 100644 --- a/drivers/staging/octeon/ethernet-mem.c +++ b/drivers/staging/octeon/ethernet-mem.c @@ -4,7 +4,7 @@ * Contact: support@caviumnetworks.com * This file is part of the OCTEON SDK * - * Copyright (c) 2003-2007 Cavium Networks + * Copyright (c) 2003-2010 Cavium Networks * * This file is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, Version 2, as @@ -26,8 +26,6 @@ **********************************************************************/ #include <linux/kernel.h> #include <linux/netdevice.h> -#include <linux/mii.h> -#include <net/dst.h> #include <asm/octeon/octeon.h> @@ -36,18 +34,19 @@ #include "cvmx-fpa.h" /** - * Fill the supplied hardware pool with skbuffs - * + * cvm_oct_fill_hw_skbuff - fill the supplied hardware pool with skbuffs * @pool: Pool to allocate an skbuff for * @size: Size of the buffer needed for the pool * @elements: Number of buffers to allocate + * + * Returns the actual number of buffers allocated. */ static int cvm_oct_fill_hw_skbuff(int pool, int size, int elements) { int freed = elements; while (freed) { - struct sk_buff *skb = dev_alloc_skb(size + 128); + struct sk_buff *skb = dev_alloc_skb(size + 256); if (unlikely(skb == NULL)) { pr_warning ("Failed to allocate skb for hardware pool %d\n", @@ -55,7 +54,7 @@ static int cvm_oct_fill_hw_skbuff(int pool, int size, int elements) break; } - skb_reserve(skb, 128 - (((unsigned long)skb->data) & 0x7f)); + skb_reserve(skb, 256 - (((unsigned long)skb->data) & 0x7f)); *(struct sk_buff **)(skb->data - sizeof(void *)) = skb; cvmx_fpa_free(skb->data, pool, DONT_WRITEBACK(size / 128)); freed--; @@ -64,8 +63,7 @@ static int cvm_oct_fill_hw_skbuff(int pool, int size, int elements) } /** - * Free the supplied hardware pool of skbuffs - * + * cvm_oct_free_hw_skbuff- free hardware pool skbuffs * @pool: Pool to allocate an skbuff for * @size: Size of the buffer needed for the pool * @elements: Number of buffers to allocate @@ -93,96 +91,76 @@ static void cvm_oct_free_hw_skbuff(int pool, int size, int elements) } /** - * This function fills a hardware pool with memory. Depending - * on the config defines, this memory might come from the - * kernel or global 32bit memory allocated with - * cvmx_bootmem_alloc. - * + * cvm_oct_fill_hw_memory - fill a hardware pool with memory. * @pool: Pool to populate * @size: Size of each buffer in the pool * @elements: Number of buffers to allocate + * + * Returns the actual number of buffers allocated. */ static int cvm_oct_fill_hw_memory(int pool, int size, int elements) { char *memory; + char *fpa; int freed = elements; - if (USE_32BIT_SHARED) { - extern uint64_t octeon_reserve32_memory; - - memory = - cvmx_bootmem_alloc_range(elements * size, 128, - octeon_reserve32_memory, - octeon_reserve32_memory + - (CONFIG_CAVIUM_RESERVE32 << 20) - - 1); - if (memory == NULL) - panic("Unable to allocate %u bytes for FPA pool %d\n", - elements * size, pool); - - pr_notice("Memory range %p - %p reserved for " - "hardware\n", memory, - memory + elements * size - 1); - - while (freed) { - cvmx_fpa_free(memory, pool, 0); - memory += size; - freed--; - } - } else { - while (freed) { - /* We need to force alignment to 128 bytes here */ - memory = kmalloc(size + 127, GFP_ATOMIC); - if (unlikely(memory == NULL)) { - pr_warning("Unable to allocate %u bytes for " - "FPA pool %d\n", - elements * size, pool); - break; - } - memory = (char *)(((unsigned long)memory + 127) & -128); - cvmx_fpa_free(memory, pool, 0); - freed--; + while (freed) { + /* + * FPA memory must be 128 byte aligned. Since we are + * aligning we need to save the original pointer so we + * can feed it to kfree when the memory is returned to + * the kernel. + * + * We allocate an extra 256 bytes to allow for + * alignment and space for the original pointer saved + * just before the block. + */ + memory = kmalloc(size + 256, GFP_ATOMIC); + if (unlikely(memory == NULL)) { + pr_warning("Unable to allocate %u bytes for FPA pool %d\n", + elements * size, pool); + break; } + fpa = (char *)(((unsigned long)memory + 256) & ~0x7fUL); + *((char **)fpa - 1) = memory; + cvmx_fpa_free(fpa, pool, 0); + freed--; } return elements - freed; } /** - * Free memory previously allocated with cvm_oct_fill_hw_memory - * + * cvm_oct_free_hw_memory - Free memory allocated by cvm_oct_fill_hw_memory * @pool: FPA pool to free * @size: Size of each buffer in the pool * @elements: Number of buffers that should be in the pool */ static void cvm_oct_free_hw_memory(int pool, int size, int elements) { - if (USE_32BIT_SHARED) { - pr_warning("Warning: 32 shared memory is not freeable\n"); - } else { - char *memory; - do { - memory = cvmx_fpa_alloc(pool); - if (memory) { - elements--; - kfree(phys_to_virt(cvmx_ptr_to_phys(memory))); - } - } while (memory); + char *memory; + char *fpa; + do { + fpa = cvmx_fpa_alloc(pool); + if (fpa) { + elements--; + fpa = (char *)phys_to_virt(cvmx_ptr_to_phys(fpa)); + memory = *((char **)fpa - 1); + kfree(memory); + } + } while (fpa); - if (elements < 0) - pr_warning("Freeing of pool %u had too many " - "buffers (%d)\n", - pool, elements); - else if (elements > 0) - pr_warning("Warning: Freeing of pool %u is " - "missing %d buffers\n", - pool, elements); - } + if (elements < 0) + pr_warning("Freeing of pool %u had too many buffers (%d)\n", + pool, elements); + else if (elements > 0) + pr_warning("Warning: Freeing of pool %u is missing %d buffers\n", + pool, elements); } int cvm_oct_mem_fill_fpa(int pool, int size, int elements) { int freed; - if (USE_SKBUFFS_IN_HW) + if (USE_SKBUFFS_IN_HW && pool == CVMX_FPA_PACKET_POOL) freed = cvm_oct_fill_hw_skbuff(pool, size, elements); else freed = cvm_oct_fill_hw_memory(pool, size, elements); @@ -191,7 +169,7 @@ int cvm_oct_mem_fill_fpa(int pool, int size, int elements) void cvm_oct_mem_empty_fpa(int pool, int size, int elements) { - if (USE_SKBUFFS_IN_HW) + if (USE_SKBUFFS_IN_HW && pool == CVMX_FPA_PACKET_POOL) cvm_oct_free_hw_skbuff(pool, size, elements); else cvm_oct_free_hw_memory(pool, size, elements); |