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Message-Id: <201005291904.o4TJ4xEl006158@thirdoffive.cmf.nrl.navy.mil>
Date: Sat, 29 May 2010 15:04:59 -0400
From: "chas williams - CONTRACTOR" <chas@....nrl.navy.mil>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net
Subject: [PATCH net-next-2.6 3/4] atm: [he] remove small buffer allocation/handling code
From: chas williams - CONTRACTOR <chas@....nrl.navy.mil>
Author: chas williams - CONTRACTOR <chas@...ax.cmf.nrl.navy.mil>
Date: Fri May 28 19:45:59 2010 -0400
atm: [he] remove small buffer allocation/handling code
Signed-off-by: Chas Williams - CONTRACTOR <chas@....nrl.navy.mil>
diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index 56c2e99..c725494 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -780,59 +780,18 @@ he_init_group(struct he_dev *he_dev, int group)
{
int i;
- /* small buffer pool */
- he_dev->rbps_pool = pci_pool_create("rbps", he_dev->pci_dev,
- CONFIG_RBPS_BUFSIZE, 8, 0);
- if (he_dev->rbps_pool == NULL) {
- hprintk("unable to create rbps pages\n");
- return -ENOMEM;
- }
-
- he_dev->rbps_base = pci_alloc_consistent(he_dev->pci_dev,
- CONFIG_RBPS_SIZE * sizeof(struct he_rbp), &he_dev->rbps_phys);
- if (he_dev->rbps_base == NULL) {
- hprintk("failed to alloc rbps_base\n");
- goto out_destroy_rbps_pool;
- }
- memset(he_dev->rbps_base, 0, CONFIG_RBPS_SIZE * sizeof(struct he_rbp));
- he_dev->rbps_virt = kmalloc(CONFIG_RBPS_SIZE * sizeof(struct he_virt), GFP_KERNEL);
- if (he_dev->rbps_virt == NULL) {
- hprintk("failed to alloc rbps_virt\n");
- goto out_free_rbps_base;
- }
-
- for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
- dma_addr_t dma_handle;
- void *cpuaddr;
-
- cpuaddr = pci_pool_alloc(he_dev->rbps_pool, GFP_KERNEL|GFP_DMA, &dma_handle);
- if (cpuaddr == NULL)
- goto out_free_rbps_virt;
-
- he_dev->rbps_virt[i].virt = cpuaddr;
- he_dev->rbps_base[i].status = RBP_LOANED | RBP_SMALLBUF | (i << RBP_INDEX_OFF);
- he_dev->rbps_base[i].phys = dma_handle;
-
- }
- he_dev->rbps_tail = &he_dev->rbps_base[CONFIG_RBPS_SIZE - 1];
-
- he_writel(he_dev, he_dev->rbps_phys, G0_RBPS_S + (group * 32));
- he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail),
- G0_RBPS_T + (group * 32));
- he_writel(he_dev, CONFIG_RBPS_BUFSIZE/4,
- G0_RBPS_BS + (group * 32));
- he_writel(he_dev,
- RBP_THRESH(CONFIG_RBPS_THRESH) |
- RBP_QSIZE(CONFIG_RBPS_SIZE - 1) |
- RBP_INT_ENB,
- G0_RBPS_QI + (group * 32));
+ he_writel(he_dev, 0x0, G0_RBPS_S + (group * 32));
+ he_writel(he_dev, 0x0, G0_RBPS_T + (group * 32));
+ he_writel(he_dev, 0x0, G0_RBPS_QI + (group * 32));
+ he_writel(he_dev, RBP_THRESH(0x1) | RBP_QSIZE(0x0),
+ G0_RBPS_BS + (group * 32));
/* large buffer pool */
he_dev->rbpl_pool = pci_pool_create("rbpl", he_dev->pci_dev,
CONFIG_RBPL_BUFSIZE, 8, 0);
if (he_dev->rbpl_pool == NULL) {
hprintk("unable to create rbpl pool\n");
- goto out_free_rbps_virt;
+ return -ENOMEM;
}
he_dev->rbpl_base = pci_alloc_consistent(he_dev->pci_dev,
@@ -934,19 +893,6 @@ out_free_rbpl_base:
out_destroy_rbpl_pool:
pci_pool_destroy(he_dev->rbpl_pool);
- i = CONFIG_RBPS_SIZE;
-out_free_rbps_virt:
- while (i--)
- pci_pool_free(he_dev->rbps_pool, he_dev->rbps_virt[i].virt,
- he_dev->rbps_base[i].phys);
- kfree(he_dev->rbps_virt);
-
-out_free_rbps_base:
- pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE *
- sizeof(struct he_rbp), he_dev->rbps_base,
- he_dev->rbps_phys);
-out_destroy_rbps_pool:
- pci_pool_destroy(he_dev->rbps_pool);
return -ENOMEM;
}
@@ -1634,22 +1580,6 @@ he_stop(struct he_dev *he_dev)
if (he_dev->rbpl_pool)
pci_pool_destroy(he_dev->rbpl_pool);
- if (he_dev->rbps_base) {
- int i;
-
- for (i = 0; i < CONFIG_RBPS_SIZE; ++i) {
- void *cpuaddr = he_dev->rbps_virt[i].virt;
- dma_addr_t dma_handle = he_dev->rbps_base[i].phys;
-
- pci_pool_free(he_dev->rbps_pool, cpuaddr, dma_handle);
- }
- pci_free_consistent(he_dev->pci_dev, CONFIG_RBPS_SIZE
- * sizeof(struct he_rbp), he_dev->rbps_base, he_dev->rbps_phys);
- }
-
- if (he_dev->rbps_pool)
- pci_pool_destroy(he_dev->rbps_pool);
-
if (he_dev->rbrq_base)
pci_free_consistent(he_dev->pci_dev, CONFIG_RBRQ_SIZE * sizeof(struct he_rbrq),
he_dev->rbrq_base, he_dev->rbrq_phys);
@@ -1740,10 +1670,7 @@ he_service_rbrq(struct he_dev *he_dev, int group)
RBRQ_CON_CLOSED(he_dev->rbrq_head) ? " CON_CLOSED" : "",
RBRQ_HBUF_ERR(he_dev->rbrq_head) ? " HBUF_ERR" : "");
- if (RBRQ_ADDR(he_dev->rbrq_head) & RBP_SMALLBUF)
- rbp = &he_dev->rbps_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
- else
- rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
+ rbp = &he_dev->rbpl_base[RBP_INDEX(RBRQ_ADDR(he_dev->rbrq_head))];
buf_len = RBRQ_BUFLEN(he_dev->rbrq_head) * 4;
cid = RBRQ_CID(he_dev->rbrq_head);
@@ -1819,15 +1746,9 @@ he_service_rbrq(struct he_dev *he_dev, int group)
__net_timestamp(skb);
- for (iov = he_vcc->iov_head;
- iov < he_vcc->iov_tail; ++iov) {
- if (iov->iov_base & RBP_SMALLBUF)
- memcpy(skb_put(skb, iov->iov_len),
- he_dev->rbps_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
- else
- memcpy(skb_put(skb, iov->iov_len),
- he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
- }
+ for (iov = he_vcc->iov_head; iov < he_vcc->iov_tail; ++iov)
+ memcpy(skb_put(skb, iov->iov_len),
+ he_dev->rbpl_virt[RBP_INDEX(iov->iov_base)].virt, iov->iov_len);
switch (vcc->qos.aal) {
case ATM_AAL0:
@@ -1867,13 +1788,8 @@ he_service_rbrq(struct he_dev *he_dev, int group)
return_host_buffers:
++pdus_assembled;
- for (iov = he_vcc->iov_head;
- iov < he_vcc->iov_tail; ++iov) {
- if (iov->iov_base & RBP_SMALLBUF)
- rbp = &he_dev->rbps_base[RBP_INDEX(iov->iov_base)];
- else
- rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
-
+ for (iov = he_vcc->iov_head; iov < he_vcc->iov_tail; ++iov) {
+ rbp = &he_dev->rbpl_base[RBP_INDEX(iov->iov_base)];
rbp->status &= ~RBP_LOANED;
}
@@ -1978,7 +1894,6 @@ next_tbrq_entry:
}
}
-
static void
he_service_rbpl(struct he_dev *he_dev, int group)
{
@@ -2007,33 +1922,6 @@ he_service_rbpl(struct he_dev *he_dev, int group)
}
static void
-he_service_rbps(struct he_dev *he_dev, int group)
-{
- struct he_rbp *newtail;
- struct he_rbp *rbps_head;
- int moved = 0;
-
- rbps_head = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
- RBPS_MASK(he_readl(he_dev, G0_RBPS_S)));
-
- for (;;) {
- newtail = (struct he_rbp *) ((unsigned long)he_dev->rbps_base |
- RBPS_MASK(he_dev->rbps_tail+1));
-
- /* table 3.42 -- rbps_tail should never be set to rbps_head */
- if ((newtail == rbps_head) || (newtail->status & RBP_LOANED))
- break;
-
- newtail->status |= RBP_LOANED;
- he_dev->rbps_tail = newtail;
- ++moved;
- }
-
- if (moved)
- he_writel(he_dev, RBPS_MASK(he_dev->rbps_tail), G0_RBPS_T);
-}
-
-static void
he_tasklet(unsigned long data)
{
unsigned long flags;
@@ -2055,10 +1943,8 @@ he_tasklet(unsigned long data)
HPRINTK("rbrq%d threshold\n", group);
/* fall through */
case ITYPE_RBRQ_TIMER:
- if (he_service_rbrq(he_dev, group)) {
+ if (he_service_rbrq(he_dev, group))
he_service_rbpl(he_dev, group);
- he_service_rbps(he_dev, group);
- }
break;
case ITYPE_TBRQ_THRESH:
HPRINTK("tbrq%d threshold\n", group);
@@ -2070,7 +1956,7 @@ he_tasklet(unsigned long data)
he_service_rbpl(he_dev, group);
break;
case ITYPE_RBPS_THRESH:
- he_service_rbps(he_dev, group);
+ /* shouldn't happen unless small buffers enabled */
break;
case ITYPE_PHY:
HPRINTK("phy interrupt\n");
@@ -2098,7 +1984,6 @@ he_tasklet(unsigned long data)
he_service_rbrq(he_dev, 0);
he_service_rbpl(he_dev, 0);
- he_service_rbps(he_dev, 0);
he_service_tbrq(he_dev, 0);
break;
default:
@@ -2406,8 +2291,8 @@ he_open(struct atm_vcc *vcc)
goto open_failed;
}
- rsr1 = RSR1_GROUP(0);
- rsr4 = RSR4_GROUP(0);
+ rsr1 = RSR1_GROUP(0) | RSR1_RBPL_ONLY;
+ rsr4 = RSR4_GROUP(0) | RSR4_RBPL_ONLY;
rsr0 = vcc->qos.rxtp.traffic_class == ATM_UBR ?
(RSR0_EPD_ENABLE|RSR0_PPD_ENABLE) : 0;
diff --git a/drivers/atm/he.h b/drivers/atm/he.h
index c2983e0..8bf3264 100644
--- a/drivers/atm/he.h
+++ b/drivers/atm/he.h
@@ -67,11 +67,6 @@
#define CONFIG_RBPL_BUFSIZE 4096
#define RBPL_MASK(x) (((unsigned long)(x))&((CONFIG_RBPL_SIZE<<3)-1))
-#define CONFIG_RBPS_SIZE 1024
-#define CONFIG_RBPS_THRESH 64
-#define CONFIG_RBPS_BUFSIZE 128
-#define RBPS_MASK(x) (((unsigned long)(x))&((CONFIG_RBPS_SIZE<<3)-1))
-
/* 5.1.3 initialize connection memory */
#define CONFIG_RSRA 0x00000
@@ -225,14 +220,8 @@ struct he_virt {
void *virt;
};
-#define RBPL_ALIGNMENT CONFIG_RBPL_SIZE
-#define RBPS_ALIGNMENT CONFIG_RBPS_SIZE
-
#ifdef notyet
struct he_group {
- u32 rpbs_size, rpbs_qsize;
- struct he_rbp rbps_ba;
-
u32 rpbl_size, rpbl_qsize;
struct he_rpb_entry *rbpl_ba;
};
@@ -303,12 +292,6 @@ struct he_dev {
struct he_virt *rbpl_virt;
int rbpl_peak;
- struct pci_pool *rbps_pool;
- dma_addr_t rbps_phys;
- struct he_rbp *rbps_base, *rbps_tail;
- struct he_virt *rbps_virt;
- int rbps_peak;
-
dma_addr_t tbrq_phys;
struct he_tbrq *tbrq_base, *tbrq_head;
int tbrq_peak;
--
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