hak5
/
openwrt
mirror of https://github.com/hak5/openwrt.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
openwrt/target/linux/cns3xxx/patches-2.6.31/206-cns3xxx_raid_support.patch

439 lines
11 KiB
Diff
Raw Blame History

--- a/crypto/xor.c
+++ b/crypto/xor.c
@@ -25,6 +25,26 @@
/* The xor routines to use. */
static struct xor_block_template *active_template;
+#ifdef CONFIG_CNS3XXX_RAID
+extern void do_cns_rdma_xorgen(unsigned int src_no, unsigned int bytes,
+ void **bh_ptr, void *dst_ptr);
+/**
+ * xor_blocks - one pass xor
+ * @src_count: source count
+ * @bytes: length in bytes
+ * @dest: dest
+ * @srcs: srcs
+ *
+ * Desc:
+ * 1. dest = xor(srcs[0...src_count-1]) within one calc
+ * 2. don't care if dest also be placed in srcs list or not.
+ */
+void xor_blocks(unsigned int src_count, unsigned int bytes, void *dest,
+ void **srcs)
+{
+ do_cns_rdma_xorgen(src_count, bytes, srcs, dest);
+}
+#else
void
xor_blocks(unsigned int src_count, unsigned int bytes, void *dest, void **srcs)
{
@@ -51,6 +71,7 @@ xor_blocks(unsigned int src_count, unsig
p4 = (unsigned long *) srcs[3];
active_template->do_5(bytes, dest, p1, p2, p3, p4);
}
+#endif /* CONFIG_CNS3XXX_RAID */
EXPORT_SYMBOL(xor_blocks);
/* Set of all registered templates. */
@@ -95,7 +116,11 @@ do_xor_speed(struct xor_block_template *
speed / 1000, speed % 1000);
}
+#ifdef CONFIG_CNS3XXX_RAID
+int
+#else
static int __init
+#endif /* CONFIG_CNS3XXX_RAID */
calibrate_xor_blocks(void)
{
void *b1, *b2;
@@ -139,7 +164,10 @@ calibrate_xor_blocks(void)
if (f->speed > fastest->speed)
fastest = f;
}
-
+#ifdef CONFIG_CNS3XXX_RAID
+ /* preferred */
+ fastest = template_list;
+#endif /* CONFIG_CNS3XXX_RAID */
printk(KERN_INFO "xor: using function: %s (%d.%03d MB/sec)\n",
fastest->name, fastest->speed / 1000, fastest->speed % 1000);
@@ -151,10 +179,20 @@ calibrate_xor_blocks(void)
return 0;
}
-static __exit void xor_exit(void) { }
+#ifndef CONFIG_CNS3XXX_RAID
+static __exit void xor_exit(void)
+{
+}
+#endif /* ! CONFIG_CNS3XXX_RAID */
MODULE_LICENSE("GPL");
+#ifdef CONFIG_CNS3XXX_RAID
+/*
+ * Calibrate in R5 init.
+ */
+#else
/* when built-in xor.o must initialize before drivers/md/md.o */
core_initcall(calibrate_xor_blocks);
module_exit(xor_exit);
+#endif /* ! CONFIG_CNS3XXX_RAID */
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -17,7 +17,7 @@ raid6_pq-y += raid6algos.o raid6recov.o
raid6int8.o raid6int16.o raid6int32.o \
raid6altivec1.o raid6altivec2.o raid6altivec4.o \
raid6altivec8.o \
- raid6mmx.o raid6sse1.o raid6sse2.o
+ raid6mmx.o raid6sse1.o raid6sse2.o raid6cns.o
hostprogs-y += mktables
# Note: link order is important. All raid personalities
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1817,11 +1817,30 @@ static void compute_block_2(struct strip
compute_parity6(sh, UPDATE_PARITY);
return;
} else {
+#ifdef CONFIG_CNS3XXX_RAID
+ void *ptrs[disks];
+
+ count = 0;
+ i = d0_idx;
+ do {
+ ptrs[count++] = page_address(sh->dev[i].page);
+ i = raid6_next_disk(i, disks);
+ if (i != dd_idx1 && i != dd_idx2 &&
+ !test_bit(R5_UPTODATE, &sh->dev[i].flags))
+ printk
+ ("compute_2 with missing block %d/%d\n",
+ count, i);
+ } while (i != d0_idx);
+
+ raid6_dataq_recov(disks, STRIPE_SIZE, faila, ptrs);
+#else
+
/* We're missing D+Q; recompute D from P */
compute_block_1(sh, ((dd_idx1 == sh->qd_idx) ?
dd_idx2 : dd_idx1),
0);
compute_parity6(sh, UPDATE_PARITY); /* Is this necessary? */
+#endif /* CONFIG_CNS3XXX_RAID */
return;
}
}
@@ -5412,8 +5431,21 @@ static struct mdk_personality raid4_pers
.quiesce = raid5_quiesce,
};
+#ifdef CONFIG_CNS3XXX_RAID
+extern int calibrate_xor_blocks(void);
+#endif /* CONFIG_CNS3XXX_RAID */
+
static int __init raid5_init(void)
{
+
+#ifdef CONFIG_CNS3XXX_RAID
+ /* Just execute calibrate xor blocks */
+ int e;
+ e = calibrate_xor_blocks();
+ if (e)
+ return e;
+#endif /* CONFIG_CNS3XXX_RAID */
+
register_md_personality(&raid6_personality);
register_md_personality(&raid5_personality);
register_md_personality(&raid4_personality);
--- a/drivers/md/raid6algos.c
+++ b/drivers/md/raid6algos.c
@@ -49,6 +49,9 @@ extern const struct raid6_calls raid6_al
extern const struct raid6_calls raid6_altivec2;
extern const struct raid6_calls raid6_altivec4;
extern const struct raid6_calls raid6_altivec8;
+#ifdef CONFIG_CNS3XXX_RAID
+extern const struct raid6_calls raid6_cns_raid;
+#endif /* CONFIG_CNS3XXX_RAID */
const struct raid6_calls * const raid6_algos[] = {
&raid6_intx1,
@@ -78,6 +81,11 @@ const struct raid6_calls * const raid6_a
&raid6_altivec4,
&raid6_altivec8,
#endif
+#ifdef CONFIG_CNS3XXX_RAID
+ /* CNS3000 HW RAID acceleration */
+ &raid6_cns_raid,
+#endif /* CONFIG_CNS3XXX_RAID */
+
NULL
};
@@ -125,7 +133,9 @@ int __init raid6_select_algo(void)
if ( !(*algo)->valid || (*algo)->valid() ) {
perf = 0;
+#ifndef CONFIG_CNS3XXX_RAID
preempt_disable();
+#endif
j0 = jiffies;
while ( (j1 = jiffies) == j0 )
cpu_relax();
@@ -134,7 +144,9 @@ int __init raid6_select_algo(void)
(*algo)->gen_syndrome(disks, PAGE_SIZE, dptrs);
perf++;
}
+#ifndef CONFIG_CNS3XXX_RAID
preempt_enable();
+#endif
if ( (*algo)->prefer > bestprefer ||
((*algo)->prefer == bestprefer &&
--- /dev/null
+++ b/drivers/md/raid6cns.c
@@ -0,0 +1,38 @@
+/*
+ * raid6cns.c
+ *
+ * CNS3xxx xor & gen_syndrome functions
+ *
+ */
+
+#ifdef CONFIG_CNS3XXX_RAID
+
+#include <linux/raid/pq.h>
+
+extern void do_cns_rdma_gfgen(unsigned int src_no, unsigned int bytes, void **bh_ptr,
+ void *p_dst, void *q_dst);
+
+/**
+ * raid6_cnsraid_gen_syndrome - CNSRAID Syndrome Generate
+ *
+ * @disks: raid disks
+ * @bytes: length
+ * @ptrs: already arranged stripe ptrs,
+ * disk0=[0], diskNNN=[disks-3],
+ * P/Q=[z0+1] & [z0+2], or, [disks-2], [disks-1]
+ */
+static void raid6_cnsraid_gen_syndrome(int disks, size_t bytes, void **ptrs)
+{
+ do_cns_rdma_gfgen(disks - 2, bytes, ptrs, ptrs[disks-2], ptrs[disks-1]);
+}
+
+const struct raid6_calls raid6_cns_raid = {
+ raid6_cnsraid_gen_syndrome, /* callback */
+ NULL, /* always valid */
+ "CNS-RAID", /* name */
+ 1 /* preferred: revise it to "0" to compare/compete with others algos */
+};
+
+EXPORT_SYMBOL(raid6_cns_raid);
+
+#endif /* CONFIG_CNS3XXX_RAID */
--- a/drivers/md/raid6recov.c
+++ b/drivers/md/raid6recov.c
@@ -20,6 +20,136 @@
#include <linux/raid/pq.h>
+#ifdef CONFIG_CNS3XXX_RAID
+#define R6_RECOV_PD 1
+#define R6_RECOV_DD 2
+#define R6_RECOV_DQ 3
+extern void do_cns_rdma_gfgen_pd_dd_dq(unsigned int src_no, unsigned int bytes,
+ void **bh_ptr, void *w1_dst,
+ void *w2_dst, int pd_dd_qd,
+ unsigned int w1_idx, unsigned int w2_idx,
+ unsigned int *src_idx);
+
+/**
+ * @disks: nr_disks
+ * @bytes: len
+ * @faila: 1st failed DD
+ * @ptrs: ptrs by order {d0, d1, ..., da, ..., dn, P, Q}
+ *
+ * Desc:
+ * new_read_ptrs = {d0, d1, ... dn, Q}
+ * dd1 = faila
+ * p_dst = P
+ */
+void raid6_datap_recov(int disks, size_t bytes, int faila, void **ptrs)
+{
+ int cnt = 0;
+ int count = 0;
+ void *p_dst, *q;
+ void *dd1_dst;
+ void *new_read_ptrs[disks - 2];
+ unsigned int read_idx[disks - 2];
+
+ q = ptrs[disks - 1];
+ p_dst = ptrs[disks - 2];
+ dd1_dst = ptrs[faila];
+
+ while (cnt < disks) {
+ if (cnt != faila && cnt != disks - 2) {
+ new_read_ptrs[count] = ptrs[cnt];
+ read_idx[count] = cnt;
+ count++;
+ }
+ cnt++;
+ }
+
+ do_cns_rdma_gfgen_pd_dd_dq(disks - 2, bytes,
+ new_read_ptrs, p_dst, dd1_dst,
+ R6_RECOV_PD, disks - 1, faila + 1, read_idx);
+}
+
+/**
+ * @disks: nr_disks
+ * @bytes: len
+ * @faila: 1st failed DD
+ * @failb: 2nd failed DD
+ * @ptrs: ptrs by order {d0, d1, ..., da, ..., db, ..., dn, P, Q}
+ *
+ * Desc:
+ * new_read_ptrs = {d0, d1, ... dn, P, Q}
+ * dd1_dst = faila
+ * dd2_dst = failb
+ */
+void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
+ void **ptrs)
+{
+
+ int cnt = 0;
+ int count = 0;
+ void *p, *q;
+ void *dd1_dst, *dd2_dst;
+ void *new_read_ptrs[disks - 2];
+ unsigned int read_idx[disks - 2];
+
+ q = ptrs[disks - 1];
+ p = ptrs[disks - 2];
+ dd1_dst = ptrs[faila];
+ dd2_dst = ptrs[failb];
+
+ while (cnt < disks) {
+ if (cnt != faila && cnt != failb) {
+ new_read_ptrs[count] = ptrs[cnt];
+ read_idx[count] = cnt;
+ count++;
+ }
+ cnt++;
+ }
+
+ do_cns_rdma_gfgen_pd_dd_dq(disks - 2, bytes,
+ new_read_ptrs, dd1_dst, dd2_dst,
+ R6_RECOV_DD, faila + 1, failb + 1, read_idx);
+}
+
+/**
+ * @disks: nr_disks
+ * @bytes: len
+ * @faila: 1st failed DD
+ * @ptrs: ptrs by order {d0, d1, ..., da, ..., dn, P, Q}
+ *
+ * Desc:
+ * new_read_ptrs = {d0, d1, ... dn, P}
+ * dd1 = faila
+ * q_dst = Q
+ */
+void raid6_dataq_recov(int disks, size_t bytes, int faila, void **ptrs)
+{
+ int cnt = 0;
+ int count = 0;
+ void *q_dst, *p;
+ void *dd1_dst;
+ void *new_read_ptrs[disks - 2];
+ unsigned int read_idx[disks - 2];
+
+ p = ptrs[disks - 2];
+ q_dst = ptrs[disks - 1];
+ dd1_dst = ptrs[faila];
+
+ while (cnt < disks) {
+ if (cnt != faila && cnt != disks - 1) {
+ new_read_ptrs[count] = ptrs[cnt];
+ read_idx[count] = cnt;
+ count++;
+ }
+ cnt++;
+ }
+
+ do_cns_rdma_gfgen_pd_dd_dq(disks - 2, bytes,
+ new_read_ptrs, dd1_dst, q_dst,
+ R6_RECOV_DQ, faila + 1, disks, read_idx);
+}
+
+#else /* CONFIG_CNS3XXX_RAID
+
/* Recover two failed data blocks. */
void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
void **ptrs)
@@ -96,6 +226,7 @@ void raid6_datap_recov(int disks, size_t
}
}
EXPORT_SYMBOL_GPL(raid6_datap_recov);
+#endif /* CONFIG_CNS3XXX_RAID */
#ifndef __KERNEL__
/* Testing only */
--- a/include/linux/raid/pq.h
+++ b/include/linux/raid/pq.h
@@ -100,6 +100,9 @@ void raid6_2data_recov(int disks, size_t
void raid6_datap_recov(int disks, size_t bytes, int faila, void **ptrs);
void raid6_dual_recov(int disks, size_t bytes, int faila, int failb,
void **ptrs);
+#ifdef CONFIG_CNS3XXX_RAID
+void raid6_dataq_recov(int disks, size_t bytes, int faila, void **ptrs);
+#endif /* CONFIG_CNS3XXX_RAID */
/* Some definitions to allow code to be compiled for testing in userspace */
#ifndef __KERNEL__
--- a/include/linux/raid/xor.h
+++ b/include/linux/raid/xor.h
@@ -1,7 +1,11 @@
#ifndef _XOR_H
#define _XOR_H
+#ifdef CONFIG_CNS3XXX_RAID
+#define MAX_XOR_BLOCKS 32
+#else
#define MAX_XOR_BLOCKS 4
+#endif /* CONFIG_CNS3XXX_RAID */
extern void xor_blocks(unsigned int count, unsigned int bytes,
void *dest, void **srcs);
--- a/mm/mempool.c
+++ b/mm/mempool.c
@@ -250,6 +250,28 @@ repeat_alloc:
}
EXPORT_SYMBOL(mempool_alloc);
+#ifdef CONFIG_CNS3XXX_RAID
+/**
+ * acs_mempool_alloc - allocate an element from a specific memory pool
+ * @pool: pointer to the memory pool which was allocated via
+ * mempool_create().
+ *
+ * this function differs from mempool_alloc by directly allocating an element
+ * from @pool without calling @pool->alloc().
+ */
+void *acs_mempool_alloc(mempool_t * pool)
+{
+ unsigned long flags;
+ void *element = NULL;
+
+ spin_lock_irqsave(&pool->lock, flags);
+ if (likely(pool->curr_nr))
+ element = remove_element(pool);
+ spin_unlock_irqrestore(&pool->lock, flags);
+ return element;
+}
+#endif /* CONFIG_CNS3XXX_RAID */
+
/**
* mempool_free - return an element to the pool.
* @element: pool element pointer.
Reference in New Issue View Git Blame Copy Permalink