From 4e416a6f49b710bfe162f0cb24bc68c74493d2a0 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Mon, 1 Sep 2008 22:48:41 +0200 Subject: [PATCH] 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 Signed-off-by: John W. Linville --- drivers/net/wireless/p54/p54.h | 6 +++-- drivers/net/wireless/p54/p54common.c | 36 ++++++++++++++++++---------- drivers/net/wireless/p54/p54common.h | 11 +++++++++ drivers/net/wireless/p54/p54pci.c | 23 +++++++++++------- drivers/net/wireless/p54/p54usb.c | 20 ++++++++++++---- 5 files changed, 69 insertions(+), 27 deletions(-) diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h index fca8762fa069..b03d13edc61f 100644 --- a/drivers/net/wireless/p54/p54.h +++ b/drivers/net/wireless/p54/p54.h @@ -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); diff --git a/drivers/net/wireless/p54/p54common.c b/drivers/net/wireless/p54/p54common.c index 6da98e6e6a9a..fa61749b467b 100644 --- a/drivers/net/wireless/p54/p54common.c +++ b/drivers/net/wireless/p54/p54common.c @@ -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); diff --git a/drivers/net/wireless/p54/p54common.h b/drivers/net/wireless/p54/p54common.h index a79c1a146917..5f2af5152505 100644 --- a/drivers/net/wireless/p54/p54common.h +++ b/drivers/net/wireless/p54/p54common.h @@ -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 diff --git a/drivers/net/wireless/p54/p54pci.c b/drivers/net/wireless/p54/p54pci.c index a0395af74c2d..fdfc7189f0ff 100644 --- a/drivers/net/wireless/p54/p54pci.c +++ b/drivers/net/wireless/p54/p54pci.c @@ -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; } diff --git a/drivers/net/wireless/p54/p54usb.c b/drivers/net/wireless/p54/p54usb.c index 8a420df605af..4dca209a6e07 100644 --- a/drivers/net/wireless/p54/p54usb.c +++ b/drivers/net/wireless/p54/p54usb.c @@ -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 {\ -- 2.20.1