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p54: enhance firmware parser to reduce memory waste 

This patch greatly reduces one of biggest memory waste in the driver.

The firmware headers provides the right values for extra head-/tailroom
and mtu size which are usually much lower than the old hardcoded ones.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2008-09-01 22:48:41 +02:00 committed by John W. Linville
parent 0c25970dc1
commit 4e416a6f49
5 changed files with 69 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/p54/p54.h
View File

@ -39,7 +39,6 @@ struct p54_control_hdr {
} __attribute__ ((packed));
#define EEPROM_READBACK_LEN (sizeof(struct p54_control_hdr) + 4 /* p54_eeprom_lm86 */)
#define MAX_RX_SIZE (IEEE80211_MAX_RTS_THRESHOLD + sizeof(struct p54_control_hdr) + 20 /* length of struct p54_rx_hdr */ + 16 )
#define ISL38XX_DEV_FIRMWARE_ADDR 0x20000
@ -53,6 +52,9 @@ struct p54_common {
void (*stop)(struct ieee80211_hw *dev);
int mode;
u16 seqno;
u16 rx_mtu;
u8 headroom;
u8 tailroom;
struct mutex conf_mutex;
u8 mac_addr[ETH_ALEN];
u8 bssid[ETH_ALEN];
@ -70,7 +72,7 @@ struct p54_common {
};
int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb);
void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw);
int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw);
int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len);
void p54_fill_eeprom_readback(struct p54_control_hdr *hdr);
struct ieee80211_hw *p54_init_common(size_t priv_data_len);

36
drivers/net/wireless/p54/p54common.c
View File

@ -66,8 +66,7 @@ static struct ieee80211_supported_band band_2GHz = {
.n_bitrates = ARRAY_SIZE(p54_rates),
};
void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
{
struct p54_common *priv = dev->priv;
struct bootrec_exp_if *exp_if;
@ -79,7 +78,7 @@ void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
int i;
if (priv->rx_start)
return;
return 0;
while (data < end_data && *data)
data++;
@ -117,11 +116,22 @@ void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
if (strnlen((unsigned char*)bootrec->data, 24) < 24)
fw_version = (unsigned char*)bootrec->data;
break;
case BR_CODE_DESCR:
priv->rx_start = le32_to_cpu(((__le32 *)bootrec->data)[1]);
case BR_CODE_DESCR: {
struct bootrec_desc *desc =
(struct bootrec_desc *)bootrec->data;
priv->rx_start = le32_to_cpu(desc->rx_start);
/* FIXME add sanity checking */
priv->rx_end = le32_to_cpu(((__le32 *)bootrec->data)[2]) - 0x3500;
priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500;
priv->headroom = desc->headroom;
priv->tailroom = desc->tailroom;
if (bootrec->len == 11)
priv->rx_mtu = (size_t) le16_to_cpu(
(__le16)bootrec->data[10]);
else
priv->rx_mtu = (size_t)
0x620 - priv->tx_hdr_len;
break;
}
case BR_CODE_EXPOSED_IF:
exp_if = (struct bootrec_exp_if *) bootrec->data;
for (i = 0; i < (len * sizeof(*exp_if) / 4); i++)
@ -152,6 +162,8 @@ void p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
priv->tx_stats[7].limit = 1;
dev->queues = 4;
}
return 0;
}
EXPORT_SYMBOL_GPL(p54_parse_firmware);
@ -428,7 +440,7 @@ static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom;
struct memrecord *range = NULL;
u32 freed = 0;
u32 last_addr = priv->rx_start;
@ -550,7 +562,7 @@ static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
u32 target_addr = priv->rx_start;
unsigned long flags;
unsigned int left;
len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
len = (len + priv->headroom + priv->tailroom + 3) & ~0x3;
spin_lock_irqsave(&priv->tx_queue.lock, flags);
left = skb_queue_len(&priv->tx_queue);
@ -585,13 +597,14 @@ static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
range->start_addr = target_addr;
range->end_addr = target_addr + len;
__skb_queue_after(&priv->tx_queue, target_skb, skb);
if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
if (largest_hole < priv->rx_mtu + priv->headroom +
priv->tailroom +
sizeof(struct p54_control_hdr))
ieee80211_stop_queues(dev);
}
spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
data->req_id = cpu_to_le32(target_addr + 0x70);
data->req_id = cpu_to_le32(target_addr + priv->headroom);
}
static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
@ -704,7 +717,7 @@ static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
filter->antenna = antenna;
filter->magic3 = cpu_to_le32(magic3);
filter->rx_addr = cpu_to_le32(priv->rx_end);
filter->max_rx = cpu_to_le16(0x0620); /* FIXME: for usb ver 1.. maybe */
filter->max_rx = cpu_to_le16(priv->rx_mtu);
filter->rxhw = priv->rxhw;
filter->magic8 = cpu_to_le16(magic8);
filter->magic9 = cpu_to_le16(magic9);
@ -1084,7 +1097,6 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
priv->tx_stats[3].limit = 1;
priv->tx_stats[4].limit = 5;
dev->queues = 1;
dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
sizeof(struct p54_tx_control_allocdata);

11
drivers/net/wireless/p54/p54common.h
View File

@ -29,6 +29,17 @@ struct bootrec_exp_if {
__le16 top_compat;
} __attribute__((packed));
struct bootrec_desc {
__le16 modes;
__le16 flags;
__le32 rx_start;
__le32 rx_end;
u8 headroom;
u8 tailroom;
u8 unimportant[6];
u8 rates[16];
} __attribute__((packed));
#define BR_CODE_MIN 0x80000000
#define BR_CODE_COMPONENT_ID 0x80000001
#define BR_CODE_COMPONENT_VERSION 0x80000002

23
drivers/net/wireless/p54/p54pci.c
View File

@ -81,7 +81,11 @@ static int p54p_upload_firmware(struct ieee80211_hw *dev)
return err;
}
p54_parse_firmware(dev, fw_entry);
err = p54_parse_firmware(dev, fw_entry);
if (err) {
release_firmware(fw_entry);
return err;
}
data = (__le32 *) fw_entry->data;
remains = fw_entry->size;
@ -258,17 +262,17 @@ static void p54p_refill_rx_ring(struct ieee80211_hw *dev,
if (!desc->host_addr) {
struct sk_buff *skb;
dma_addr_t mapping;
skb = dev_alloc_skb(MAX_RX_SIZE);
skb = dev_alloc_skb(priv->common.rx_mtu + 32);
if (!skb)
break;
mapping = pci_map_single(priv->pdev,
skb_tail_pointer(skb),
MAX_RX_SIZE,
priv->common.rx_mtu + 32,
PCI_DMA_FROMDEVICE);
desc->host_addr = cpu_to_le32(mapping);
desc->device_addr = 0; // FIXME: necessary?
desc->len = cpu_to_le16(MAX_RX_SIZE);
desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
desc->flags = 0;
rx_buf[i] = skb;
}
@ -311,12 +315,13 @@ static void p54p_check_rx_ring(struct ieee80211_hw *dev, u32 *index,
if (p54_rx(dev, skb)) {
pci_unmap_single(priv->pdev,
le32_to_cpu(desc->host_addr),
MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
priv->common.rx_mtu + 32,
PCI_DMA_FROMDEVICE);
rx_buf[i] = NULL;
desc->host_addr = 0;
} else {
skb_trim(skb, 0);
desc->len = cpu_to_le16(MAX_RX_SIZE);
desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
}
i++;
@ -534,7 +539,8 @@ static void p54p_stop(struct ieee80211_hw *dev)
if (desc->host_addr)
pci_unmap_single(priv->pdev,
le32_to_cpu(desc->host_addr),
MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
priv->common.rx_mtu + 32,
PCI_DMA_FROMDEVICE);
kfree_skb(priv->rx_buf_data[i]);
priv->rx_buf_data[i] = NULL;
}
@ -544,7 +550,8 @@ static void p54p_stop(struct ieee80211_hw *dev)
if (desc->host_addr)
pci_unmap_single(priv->pdev,
le32_to_cpu(desc->host_addr),
MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
priv->common.rx_mtu + 32,
PCI_DMA_FROMDEVICE);
kfree_skb(priv->rx_buf_mgmt[i]);
priv->rx_buf_mgmt[i] = NULL;
}

20
drivers/net/wireless/p54/p54usb.c
View File

@ -95,7 +95,7 @@ static void p54u_rx_cb(struct urb *urb)
skb_pull(skb, sizeof(struct net2280_tx_hdr));
if (p54_rx(dev, skb)) {
skb = dev_alloc_skb(MAX_RX_SIZE);
skb = dev_alloc_skb(priv->common.rx_mtu + 32);
if (unlikely(!skb)) {
usb_free_urb(urb);
/* TODO check rx queue length and refill *somewhere* */
@ -145,7 +145,7 @@ static int p54u_init_urbs(struct ieee80211_hw *dev)
struct p54u_rx_info *info;
while (skb_queue_len(&priv->rx_queue) < 32) {
skb = __dev_alloc_skb(MAX_RX_SIZE, GFP_KERNEL);
skb = __dev_alloc_skb(priv->common.rx_mtu + 32, GFP_KERNEL);
if (!skb)
break;
entry = usb_alloc_urb(0, GFP_KERNEL);
@ -153,7 +153,10 @@ static int p54u_init_urbs(struct ieee80211_hw *dev)
kfree_skb(skb);
break;
}
usb_fill_bulk_urb(entry, priv->udev, usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), skb_tail_pointer(skb), MAX_RX_SIZE, p54u_rx_cb, skb);
usb_fill_bulk_urb(entry, priv->udev,
usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA),
skb_tail_pointer(skb),
priv->common.rx_mtu + 32, p54u_rx_cb, skb);
info = (struct p54u_rx_info *) skb->cb;
info->urb = entry;
info->dev = dev;
@ -412,7 +415,9 @@ static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
goto err_req_fw_failed;
}
p54_parse_firmware(dev, fw_entry);
err = p54_parse_firmware(dev, fw_entry);
if (err)
goto err_upload_failed;
left = block_size = min((size_t)P54U_FW_BLOCK, fw_entry->size);
strcpy(buf, start_string);
@ -549,7 +554,12 @@ static int p54u_upload_firmware_net2280(struct ieee80211_hw *dev)
return err;
}
p54_parse_firmware(dev, fw_entry);
err = p54_parse_firmware(dev, fw_entry);
if (err) {
kfree(buf);
release_firmware(fw_entry);
return err;
}
#define P54U_WRITE(type, addr, data) \
do {\