diff options
Diffstat (limited to 'drivers/net/wimax/i2400m')
| -rw-r--r-- | drivers/net/wimax/i2400m/control.c | 124 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/driver.c | 45 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/fw.c | 58 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/i2400m-sdio.h | 9 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/i2400m.h | 48 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/netdev.c | 4 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/op-rfkill.c | 4 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/rx.c | 10 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/sdio-fw.c | 109 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/sdio-rx.c | 47 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/sdio.c | 68 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/tx.c | 75 | ||||
| -rw-r--r-- | drivers/net/wimax/i2400m/usb.c | 5 |
13 files changed, 396 insertions, 210 deletions
diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c index b3cadb626fe..07308686dbc 100644 --- a/drivers/net/wimax/i2400m/control.c +++ b/drivers/net/wimax/i2400m/control.c @@ -292,8 +292,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p ss %p [%u])\n", i2400m, ss, i2400m_state); - if (unlikely(i2400m->ready == 0)) /* act if up */ - goto out; if (i2400m->state != i2400m_state) { i2400m->state = i2400m_state; wake_up_all(&i2400m->state_wq); @@ -341,7 +339,6 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m, i2400m->bus_reset(i2400m, I2400M_RT_WARM); break; }; -out: d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n", i2400m, ss, i2400m_state); } @@ -372,8 +369,6 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p ms %p [%u])\n", i2400m, ms, status); - if (unlikely(i2400m->ready == 0)) /* act if up */ - goto out; switch (status) { case I2400M_MEDIA_STATUS_LINK_UP: netif_carrier_on(net_dev); @@ -393,14 +388,59 @@ void i2400m_report_tlv_media_status(struct i2400m *i2400m, dev_err(dev, "HW BUG? unknown media status %u\n", status); }; -out: d_fnend(3, dev, "(i2400m %p ms %p [%u]) = void\n", i2400m, ms, status); } /* - * Parse a 'state report' and extract carrier on/off information + * Process a TLV from a 'state report' + * + * @i2400m: device descriptor + * @tlv: pointer to the TLV header; it has been already validated for + * consistent size. + * @tag: for error messages + * + * Act on the TLVs from a 'state report'. + */ +static +void i2400m_report_state_parse_tlv(struct i2400m *i2400m, + const struct i2400m_tlv_hdr *tlv, + const char *tag) +{ + struct device *dev = i2400m_dev(i2400m); + const struct i2400m_tlv_media_status *ms; + const struct i2400m_tlv_system_state *ss; + const struct i2400m_tlv_rf_switches_status *rfss; + + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, sizeof(*ss))) { + ss = container_of(tlv, typeof(*ss), hdr); + d_printf(2, dev, "%s: system state TLV " + "found (0x%04x), state 0x%08x\n", + tag, I2400M_TLV_SYSTEM_STATE, + le32_to_cpu(ss->state)); + i2400m_report_tlv_system_state(i2400m, ss); + } + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, sizeof(*rfss))) { + rfss = container_of(tlv, typeof(*rfss), hdr); + d_printf(2, dev, "%s: RF status TLV " + "found (0x%04x), sw 0x%02x hw 0x%02x\n", + tag, I2400M_TLV_RF_STATUS, + le32_to_cpu(rfss->sw_rf_switch), + le32_to_cpu(rfss->hw_rf_switch)); + i2400m_report_tlv_rf_switches_status(i2400m, rfss); + } + if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, sizeof(*ms))) { + ms = container_of(tlv, typeof(*ms), hdr); + d_printf(2, dev, "%s: Media Status TLV: %u\n", + tag, le32_to_cpu(ms->media_status)); + i2400m_report_tlv_media_status(i2400m, ms); + } +} + + +/* + * Parse a 'state report' and extract information * * @i2400m: device descriptor * @l3l4_hdr: pointer to message; it has been already validated for @@ -409,13 +449,7 @@ out: * declaration is assumed to be congruent with @size (as in * sizeof(*l3l4_hdr) + l3l4_hdr->length == size) * - * Extract from the report state the system state TLV and infer from - * there if we have a carrier or not. Update our local state and tell - * netdev. - * - * When setting the carrier, it's fine to set OFF twice (for example), - * as netif_carrier_off() will not generate two OFF events (just on - * the transitions). + * Walk over the TLVs in a report state and act on them. */ static void i2400m_report_state_hook(struct i2400m *i2400m, @@ -424,9 +458,6 @@ void i2400m_report_state_hook(struct i2400m *i2400m, { struct device *dev = i2400m_dev(i2400m); const struct i2400m_tlv_hdr *tlv; - const struct i2400m_tlv_system_state *ss; - const struct i2400m_tlv_rf_switches_status *rfss; - const struct i2400m_tlv_media_status *ms; size_t tlv_size = le16_to_cpu(l3l4_hdr->length); d_fnstart(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n", @@ -434,34 +465,8 @@ void i2400m_report_state_hook(struct i2400m *i2400m, tlv = NULL; while ((tlv = i2400m_tlv_buffer_walk(i2400m, &l3l4_hdr->pl, - tlv_size, tlv))) { - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE, - sizeof(*ss))) { - ss = container_of(tlv, typeof(*ss), hdr); - d_printf(2, dev, "%s: system state TLV " - "found (0x%04x), state 0x%08x\n", - tag, I2400M_TLV_SYSTEM_STATE, - le32_to_cpu(ss->state)); - i2400m_report_tlv_system_state(i2400m, ss); - } - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS, - sizeof(*rfss))) { - rfss = container_of(tlv, typeof(*rfss), hdr); - d_printf(2, dev, "%s: RF status TLV " - "found (0x%04x), sw 0x%02x hw 0x%02x\n", - tag, I2400M_TLV_RF_STATUS, - le32_to_cpu(rfss->sw_rf_switch), - le32_to_cpu(rfss->hw_rf_switch)); - i2400m_report_tlv_rf_switches_status(i2400m, rfss); - } - if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS, - sizeof(*ms))) { - ms = container_of(tlv, typeof(*ms), hdr); - d_printf(2, dev, "%s: Media Status TLV: %u\n", - tag, le32_to_cpu(ms->media_status)); - i2400m_report_tlv_media_status(i2400m, ms); - } - } + tlv_size, tlv))) + i2400m_report_state_parse_tlv(i2400m, tlv, tag); d_fnend(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n", i2400m, l3l4_hdr, size, tag); } @@ -500,8 +505,15 @@ void i2400m_report_hook(struct i2400m *i2400m, * it. */ case I2400M_MT_REPORT_POWERSAVE_READY: /* zzzzz */ if (l3l4_hdr->status == cpu_to_le16(I2400M_MS_DONE_OK)) { - d_printf(1, dev, "ready for powersave, requesting\n"); - i2400m_cmd_enter_powersave(i2400m); + if (i2400m_power_save_disabled) + d_printf(1, dev, "ready for powersave, " + "not requesting (disabled by module " + "parameter)\n"); + else { + d_printf(1, dev, "ready for powersave, " + "requesting\n"); + i2400m_cmd_enter_powersave(i2400m); + } } break; }; @@ -683,8 +695,9 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, d_fnstart(3, dev, "(i2400m %p buf %p len %zu)\n", i2400m, buf, buf_len); + rmb(); /* Make sure we see what i2400m_dev_reset_handle() */ if (i2400m->boot_mode) - return ERR_PTR(-ENODEV); + return ERR_PTR(-EL3RST); msg_l3l4_hdr = buf; /* Check msg & payload consistency */ @@ -721,6 +734,8 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, ack_timeout = HZ; }; + if (unlikely(i2400m->trace_msg_from_user)) + wimax_msg(&i2400m->wimax_dev, "echo", buf, buf_len, GFP_KERNEL); /* The RX path in rx.c will put any response for this message * in i2400m->ack_skb and wake us up. If we cancel the wait, * we need to change the value of i2400m->ack_skb to something @@ -755,6 +770,9 @@ struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m, ack_l3l4_hdr = wimax_msg_data_len(ack_skb, &ack_len); /* Check the ack and deliver it if it is ok */ + if (unlikely(i2400m->trace_msg_from_user)) + wimax_msg(&i2400m->wimax_dev, "echo", + ack_l3l4_hdr, ack_len, GFP_KERNEL); result = i2400m_msg_size_check(i2400m, ack_l3l4_hdr, ack_len); if (result < 0) { dev_err(dev, "HW BUG? reply to message 0x%04x: %d\n", @@ -1379,16 +1397,16 @@ error: * * @i2400m: device descriptor * - * Gracefully stops the device, moving it to the lowest power - * consumption state possible. + * Release resources acquired during the running of the device; in + * theory, should also tell the device to go to sleep, switch off the + * radio, all that, but at this point, in most cases (driver + * disconnection, reset handling) we can't even talk to the device. */ void i2400m_dev_shutdown(struct i2400m *i2400m) { - int result = -ENODEV; struct device *dev = i2400m_dev(i2400m); d_fnstart(3, dev, "(i2400m %p)\n", i2400m); - result = i2400m->bus_reset(i2400m, I2400M_RT_WARM); - d_fnend(3, dev, "(i2400m %p) = void [%d]\n", i2400m, result); + d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); return; } diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c index 07a54bad237..304f0443ca4 100644 --- a/drivers/net/wimax/i2400m/driver.c +++ b/drivers/net/wimax/i2400m/driver.c @@ -62,6 +62,7 @@ * unregister_netdev() */ #include "i2400m.h" +#include <linux/etherdevice.h> #include <linux/wimax/i2400m.h> #include <linux/module.h> #include <linux/moduleparam.h> @@ -81,6 +82,14 @@ module_param_named(rx_reorder_disabled, i2400m_rx_reorder_disabled, int, 0644); MODULE_PARM_DESC(rx_reorder_disabled, "If true, RX reordering will be disabled."); +int i2400m_power_save_disabled; /* 0 (power saving enabled) by default */ +module_param_named(power_save_disabled, i2400m_power_save_disabled, int, 0644); +MODULE_PARM_DESC(power_save_disabled, + "If true, the driver will not tell the device to enter " + "power saving mode when it reports it is ready for it. " + "False by default (so the device is told to do power " + "saving)."); + /** * i2400m_queue_work - schedule work on a i2400m's queue * @@ -171,7 +180,6 @@ int i2400m_schedule_work(struct i2400m *i2400m, int result; struct i2400m_work *iw; - BUG_ON(i2400m->work_queue == NULL); result = -ENOMEM; iw = kzalloc(sizeof(*iw), gfp_flags); if (iw == NULL) @@ -234,9 +242,6 @@ int i2400m_op_msg_from_user(struct wimax_dev *wimax_dev, result = PTR_ERR(ack_skb); if (IS_ERR(ack_skb)) goto error_msg_to_dev; - if (unlikely(i2400m->trace_msg_from_user)) - wimax_msg(&i2400m->wimax_dev, "trace", - msg_buf, msg_len, GFP_KERNEL); result = wimax_msg_send(&i2400m->wimax_dev, ack_skb); error_msg_to_dev: d_fnend(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p msg_len %zu " @@ -379,6 +384,11 @@ error: * Uploads firmware and brings up all the resources needed to be able * to communicate with the device. * + * The workqueue has to be setup early, at least before RX handling + * (it's only real user for now) so it can process reports as they + * arrive. We also want to destroy it if we retry, to make sure it is + * flushed...easier like this. + * * TX needs to be setup before the bus-specific code (otherwise on * shutdown, the bus-tx code could try to access it). */ @@ -389,7 +399,7 @@ int __i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri flags) struct wimax_dev *wimax_dev = &i2400m->wimax_dev; struct net_device *net_dev = wimax_dev->net_dev; struct device *dev = i2400m_dev(i2400m); - int times = 3; + int times = i2400m->bus_bm_retries; d_fnstart(3, dev, "(i2400m %p)\n", i2400m); retry: @@ -404,15 +414,15 @@ retry: result = i2400m_rx_setup(i2400m); if (result < 0) goto error_rx_setup; - result = i2400m->bus_dev_start(i2400m); - if (result < 0) - goto error_bus_dev_start; i2400m->work_queue = create_singlethread_workqueue(wimax_dev->name); if (i2400m->work_queue == NULL) { result = -ENOMEM; dev_err(dev, "cannot create workqueue\n"); goto error_create_workqueue; } + result = i2400m->bus_dev_start(i2400m); + if (result < 0) + goto error_bus_dev_start; result = i2400m_firmware_check(i2400m); /* fw versions ok? */ if (result < 0) goto error_fw_check; @@ -434,17 +444,17 @@ retry: error_dev_initialize: error_check_mac_addr: error_fw_check: - destroy_workqueue(i2400m->work_queue); -error_create_workqueue: i2400m->bus_dev_stop(i2400m); error_bus_dev_start: + destroy_workqueue(i2400m->work_queue); +error_create_workqueue: i2400m_rx_release(i2400m); error_rx_setup: i2400m_tx_release(i2400m); error_tx_setup: error_bootstrap: - if (result == -ERESTARTSYS && times-- > 0) { - flags = I2400M_BRI_SOFT; + if (result == -EL3RST && times-- > 0) { + flags = I2400M_BRI_SOFT|I2400M_BRI_MAC_REINIT; goto retry; } d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n", @@ -473,7 +483,9 @@ int i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri bm_flags) * * Returns: 0 if ok, < 0 errno code on error. * - * Releases all the resources allocated to communicate with the device. + * Releases all the resources allocated to communicate with the + * device. Note we cannot destroy the workqueue earlier as until RX is + * fully destroyed, it could still try to schedule jobs. */ static void __i2400m_dev_stop(struct i2400m *i2400m) @@ -485,8 +497,8 @@ void __i2400m_dev_stop(struct i2400m *i2400m) wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING); i2400m_dev_shutdown(i2400m); i2400m->ready = 0; - destroy_workqueue(i2400m->work_queue); i2400m->bus_dev_stop(i2400m); + destroy_workqueue(i2400m->work_queue); i2400m_rx_release(i2400m); i2400m_tx_release(i2400m); wimax_state_change(wimax_dev, WIMAX_ST_DOWN); @@ -548,7 +560,7 @@ void __i2400m_dev_reset_handle(struct work_struct *ws) * i2400m_dev_stop() [we are shutting down anyway, so * ignore it] or we are resetting somewhere else. */ dev_err(dev, "device rebooted\n"); - i2400m_msg_to_dev_cancel_wait(i2400m, -ERESTARTSYS); + i2400m_msg_to_dev_cancel_wait(i2400m, -EL3RST); complete(&i2400m->msg_completion); goto out; } @@ -598,6 +610,8 @@ out: */ int i2400m_dev_reset_handle(struct i2400m *i2400m) { + i2400m->boot_mode = 1; + wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ return i2400m_schedule_work(i2400m, __i2400m_dev_reset_handle, GFP_ATOMIC); } @@ -650,6 +664,7 @@ int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags) result = i2400m_read_mac_addr(i2400m); if (result < 0) goto error_read_mac_addr; + random_ether_addr(i2400m->src_mac_addr); result = register_netdev(net_dev); /* Okey dokey, bring it up */ if (result < 0) { diff --git a/drivers/net/wimax/i2400m/fw.c b/drivers/net/wimax/i2400m/fw.c index 675c6ce810c..e81750e5445 100644 --- a/drivers/net/wimax/i2400m/fw.c +++ b/drivers/net/wimax/i2400m/fw.c @@ -397,7 +397,7 @@ static int i2400m_download_chunk(struct i2400m *i2400m, const void *chunk, unsigned int direct, unsigned int do_csum) { int ret; - size_t chunk_len = ALIGN(__chunk_len, I2400M_PL_PAD); + size_t chunk_len = ALIGN(__chunk_len, I2400M_PL_ALIGN); struct device *dev = i2400m_dev(i2400m); struct { struct i2400m_bootrom_header cmd; @@ -532,14 +532,14 @@ int i2400m_dnload_finalize(struct i2400m *i2400m, cmd = (void *) bcf + offset; if (i2400m->sboot == 0) { struct i2400m_bootrom_header jump_ack; - d_printf(3, dev, "unsecure boot, jumping to 0x%08x\n", + d_printf(1, dev, "unsecure boot, jumping to 0x%08x\n", le32_to_cpu(cmd->target_addr)); i2400m_brh_set_opcode(cmd, I2400M_BRH_JUMP); cmd->data_size = 0; ret = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd), &jump_ack, sizeof(jump_ack), 0); } else { - d_printf(3, dev, "secure boot, jumping to 0x%08x\n", + d_printf(1, dev, "secure boot, jumping to 0x%08x\n", le32_to_cpu(cmd->target_addr)); cmd_buf = i2400m->bm_cmd_buf; memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd)); @@ -696,8 +696,7 @@ error_dev_gone: return result; error_timeout: - dev_err(dev, "Timed out waiting for reboot ack, resetting\n"); - i2400m->bus_reset(i2400m, I2400M_RT_BUS); + dev_err(dev, "Timed out waiting for reboot ack\n"); result = -ETIMEDOUT; goto exit_timeout; } @@ -770,40 +769,21 @@ error_read_mac: static int i2400m_dnload_init_nonsigned(struct i2400m *i2400m) { -#define POKE(a, d) { \ - .address = cpu_to_le32(a), \ - .data = cpu_to_le32(d) \ -} - static const struct { - __le32 address; - __le32 data; - } i2400m_pokes[] = { - POKE(0x081A58, 0xA7810230), - POKE(0x080040, 0x00000000), - POKE(0x080048, 0x00000082), - POKE(0x08004C, 0x0000081F), - POKE(0x080054, 0x00000085), - POKE(0x080058, 0x00000180), - POKE(0x08005C, 0x00000018), - POKE(0x080060, 0x00000010), - POKE(0x080574, 0x00000001), - POKE(0x080550, 0x00000005), - POKE(0xAE0000, 0x00000000), - }; -#undef POKE - unsigned i; - int ret; + unsigned i = 0; + int ret = 0; struct device *dev = i2400m_dev(i2400m); - - dev_warn(dev, "WARNING!!! non-signed boot UNTESTED PATH!\n"); - d_fnstart(5, dev, "(i2400m %p)\n", i2400m); - for (i = 0; i < ARRAY_SIZE(i2400m_pokes); i++) { - ret = i2400m_download_chunk(i2400m, &i2400m_pokes[i].data, - sizeof(i2400m_pokes[i].data), - i2400m_pokes[i].address, 1, 1); - if (ret < 0) - break; + if (i2400m->bus_bm_pokes_table) { + while (i2400m->bus_bm_pokes_table[i].address) { + ret = i2400m_download_chunk( + i2400m, + &i2400m->bus_bm_pokes_table[i].data, + sizeof(i2400m->bus_bm_pokes_table[i].data), + i2400m->bus_bm_pokes_table[i].address, 1, 1); + if (ret < 0) + break; + i++; + } } d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret); return ret; @@ -980,11 +960,12 @@ int i2400m_fw_dnload(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf, { int ret = 0; struct device *dev = i2400m_dev(i2400m); - int count = I2400M_BOOT_RETRIES; + int count = i2400m->bus_bm_retries; d_fnstart(5, dev, "(i2400m %p bcf %p size %zu)\n", i2400m, bcf, bcf_size); i2400m->boot_mode = 1; + wmb(); /* Make sure other readers see it */ hw_reboot: if (count-- == 0) { ret = -ERESTARTSYS; @@ -1033,6 +1014,7 @@ hw_reboot: d_printf(2, dev, "fw %s successfully uploaded\n", i2400m->fw_name); i2400m->boot_mode = 0; + wmb(); /* Make sure i2400m_msg_to_dev() sees boot_mode */ error_dnload_finalize: error_dnload_bcf: error_dnload_init: diff --git a/drivers/net/wimax/i2400m/i2400m-sdio.h b/drivers/net/wimax/i2400m/i2400m-sdio.h index 08c2fb73923..9c4e3189f7b 100644 --- a/drivers/net/wimax/i2400m/i2400m-sdio.h +++ b/drivers/net/wimax/i2400m/i2400m-sdio.h @@ -78,6 +78,8 @@ enum { /* The number of ticks to wait for the device to signal that * it is ready */ I2400MS_INIT_SLEEP_INTERVAL = 10, + /* How long to wait for the device to settle after reset */ + I2400MS_SETTLE_TIME = 40, }; @@ -105,6 +107,10 @@ struct i2400ms { char tx_wq_name[32]; struct dentry *debugfs_dentry; + + wait_queue_head_t bm_wfa_wq; + int bm_wait_result; + size_t bm_ack_size; }; @@ -129,4 +135,7 @@ extern ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *, extern ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *, struct i2400m_bootrom_header *, size_t); +extern void i2400ms_bus_bm_release(struct i2400m *); +extern int i2400ms_bus_bm_setup(struct i2400m *); + #endif /* #ifndef __I2400M_SDIO_H__ */ diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h index 3ae2df38b59..1fe5da4cf0a 100644 --- a/drivers/net/wimax/i2400m/i2400m.h +++ b/drivers/net/wimax/i2400m/i2400m.h @@ -150,11 +150,33 @@ enum { /* Firmware uploading */ I2400M_BOOT_RETRIES = 3, + I3200_BOOT_RETRIES = 3, /* Size of the Boot Mode Command buffer */ I2400M_BM_CMD_BUF_SIZE = 16 * 1024, I2400M_BM_ACK_BUF_SIZE = 256, }; +/** + * struct i2400m_poke_table - Hardware poke table for the Intel 2400m + * + * This structure will be used to create a device specific poke table + * to put the device in a consistant state at boot time. + * + * @address: The device address to poke + * + * @data: The data value to poke to the device address + * + */ +struct i2400m_poke_table{ + __le32 address; + __le32 data; +}; + +#define I2400M_FW_POKE(a, d) { \ + .address = cpu_to_le32(a), \ + .data = cpu_to_le32(d) \ +} + /** * i2400m_reset_type - methods to reset a device @@ -224,6 +246,17 @@ struct i2400m_roq; * process, so it cannot rely on common infrastructure being laid * out. * + * @bus_bm_retries: [fill] How many times shall a firmware upload / + * device initialization be retried? Different models of the same + * device might need different values, hence it is set by the + * bus-specific driver. Note this value is used in two places, + * i2400m_fw_dnload() and __i2400m_dev_start(); they won't become + * multiplicative (__i2400m_dev_start() calling N times + * i2400m_fw_dnload() and this trying N times to download the + * firmware), as if __i2400m_dev_start() only retries if the + * firmware crashed while initializing the device (not in a + * general case). + * * @bus_bm_cmd_send: [fill] Function called to send a boot-mode * command. Flags are defined in 'enum i2400m_bm_cmd_flags'. This * is synchronous and has to return 0 if ok or < 0 errno code in @@ -252,6 +285,12 @@ struct i2400m_roq; * address provided in boot mode is kind of broken and needs to * be re-read later on. * + * @bus_bm_pokes_table: [fill/optional] A table of device addresses + * and values that will be poked at device init time to move the + * device to the correct state for the type of boot/firmware being + * used. This table MUST be terminated with (0x000000, + * 0x00000000) or bad things will happen. + * * * @wimax_dev: WiMAX generic device for linkage into the kernel WiMAX * stack. Due to the way a net_device is allocated, we need to @@ -323,6 +362,10 @@ struct i2400m_roq; * delivered. Then the driver can release them to the host. See * drivers/net/i2400m/rx.c for details. * + * @src_mac_addr: MAC address used to make ethernet packets be coming + * from. This is generated at i2400m_setup() time and used during + * the life cycle of the instance. See i2400m_fake_eth_header(). + * * @init_mutex: Mutex used for serializing the device bringup * sequence; this way if the device reboots in the middle, we * don't try to do a bringup again while we are tearing down the @@ -395,6 +438,8 @@ struct i2400m { size_t bus_tx_block_size; size_t bus_pl_size_max; + unsigned bus_bm_retries; + int (*bus_dev_start)(struct i2400m *); void (*bus_dev_stop)(struct i2400m *); void (*bus_tx_kick)(struct i2400m *); @@ -406,6 +451,7 @@ struct i2400m { struct i2400m_bootrom_header *, size_t); const char **bus_fw_names; unsigned bus_bm_mac_addr_impaired:1; + const struct i2400m_poke_table *bus_bm_pokes_table; spinlock_t tx_lock; /* protect TX state */ void *tx_buf; @@ -421,6 +467,7 @@ struct i2400m { unsigned rx_pl_num, rx_pl_max, rx_pl_min, rx_num, rx_size_acc, rx_size_min, rx_size_max; struct i2400m_roq *rx_roq; /* not under rx_lock! */ + u8 src_mac_addr[ETH_HLEN]; struct mutex msg_mutex; /* serialize command execution */ struct completion msg_completion; @@ -704,6 +751,7 @@ static const __le32 i2400m_SBOOT_BARKER[4] = { cpu_to_le32(I2400M_SBOOT_BARKER) }; +extern int i2400m_power_save_disabled; /* * Utility functions diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c index 6b1fe7a81f2..9653f478b38 100644 --- a/drivers/net/wimax/i2400m/netdev.c +++ b/drivers/net/wimax/i2400m/netdev.c @@ -404,10 +404,12 @@ static void i2400m_rx_fake_eth_header(struct net_device *net_dev, void *_eth_hdr, __be16 protocol) { + struct i2400m *i2400m = net_dev_to_i2400m(net_dev); struct ethhdr *eth_hdr = _eth_hdr; memcpy(eth_hdr->h_dest, net_dev->dev_addr, sizeof(eth_hdr->h_dest)); - memset(eth_hdr->h_source, 0, sizeof(eth_hdr->h_dest)); + memcpy(eth_hdr->h_source, i2400m->src_mac_addr, + sizeof(eth_hdr->h_source)); eth_hdr->h_proto = protocol; } diff --git a/drivers/net/wimax/i2400m/op-rfkill.c b/drivers/net/wimax/i2400m/op-rfkill.c index 487ec58cea4..43927b5d7ad 100644 --- a/drivers/net/wimax/i2400m/op-rfkill.c +++ b/drivers/net/wimax/i2400m/op-rfkill.c @@ -54,8 +54,10 @@ int i2400m_radio_is(struct i2400m *i2400m, enum wimax_rf_state state) /* state == WIMAX_RF_ON */ return i2400m->state != I2400M_SS_RF_OFF && i2400m->state != I2400M_SS_RF_SHUTDOWN; - else + else { BUG(); + return -EINVAL; /* shut gcc warnings on certain arches */ + } } diff --git a/drivers/net/wimax/i2400m/rx.c b/drivers/net/wimax/i2400m/rx.c index f9fc3890232..07c32e68909 100644 --- a/drivers/net/wimax/i2400m/rx.c +++ b/drivers/net/wimax/i2400m/rx.c @@ -177,7 +177,8 @@ void i2400m_report_hook_work(struct work_struct *ws) struct i2400m_work *iw = container_of(ws, struct i2400m_work, ws); struct i2400m_report_hook_args *args = (void *) iw->pl; - i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size); + if (iw->i2400m->ready) + i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size); kfree_skb(args->skb_rx); i2400m_put(iw->i2400m); kfree(iw); @@ -309,6 +310,9 @@ void i2400m_rx_ctl(struct i2400m *i2400m, struct sk_buff *skb_rx, skb_get(skb_rx); i2400m_queue_work(i2400m, i2400m_report_hook_work, GFP_KERNEL, &args, sizeof(args)); + if (unlikely(i2400m->trace_msg_from_user)) + wimax_msg(&i2400m->wimax_dev, "echo", + l3l4_hdr, size, GFP_KERNEL); result = wimax_msg(&i2400m->wimax_dev, NULL, l3l4_hdr, size, GFP_KERNEL); if (result < 0) @@ -1144,7 +1148,7 @@ int i2400m_rx(struct i2400m *i2400m, struct sk_buff *skb) num_pls = le16_to_cpu(msg_hdr->num_pls); pl_itr = sizeof(*msg_hdr) + /* Check payload descriptor(s) */ num_pls * sizeof(msg_hdr->pld[0]); - pl_itr = ALIGN(pl_itr, I2400M_PL_PAD); + pl_itr = ALIGN(pl_itr, I2400M_PL_ALIGN); if (pl_itr > skb->len) { /* got all the payload descriptors? */ dev_err(dev, "RX: HW BUG? message too short (%u bytes) for " "%u payload descriptors (%zu each, total %zu)\n", @@ -1162,7 +1166,7 @@ int i2400m_rx(struct i2400m *i2400m, struct sk_buff *skb) single_last = num_pls == 1 || i == num_pls - 1; i2400m_rx_payload(i2400m, skb, single_last, &msg_hdr->pld[i], skb->data + pl_itr); - pl_itr += ALIGN(pl_size, I2400M_PL_PAD); + pl_itr += ALIGN(pl_size, I2400M_PL_ALIGN); cond_resched(); /* Don't monopolize */ } kfree_skb(skb); diff --git a/drivers/net/wimax/i2400m/sdio-fw.c b/drivers/net/wimax/i2400m/sdio-fw.c index 3487205d8f5..7d6ec0f475f 100644 --- a/drivers/net/wimax/i2400m/sdio-fw.c +++ b/drivers/net/wimax/i2400m/sdio-fw.c @@ -46,17 +46,24 @@ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> * - SDIO rehash for changes in the bus-driver model * + * Dirk Brandewie <dirk.j.brandewie@intel.com> + * - Make it IRQ based, not polling + * * THE PROCEDURE * * See fw.c for the generic description of this procedure. * * This file implements only the SDIO specifics. It boils down to how * to send a command and waiting for an acknowledgement from the - * device. We do polled reads. + * device. + * + * All this code is sequential -- all i2400ms_bus_bm_*() functions are + * executed in the same thread, except i2400ms_bm_irq() [on its own by + * the SDIO driver]. This makes it possible to avoid locking. * * COMMAND EXECUTION * - * THe generic firmware upload code will call i2400m_bus_bm_cmd_send() + * The generic firmware upload code will call i2400m_bus_bm_cmd_send() * to send commands. * * The SDIO devices expects things in 256 byte blocks, so it will pad @@ -64,12 +71,15 @@ * * ACK RECEPTION * - * This works in polling mode -- the fw loader says when to wait for - * data and for that it calls i2400ms_bus_bm_wait_for_ack(). + * This works in IRQ mode -- the fw loader says when to wait for data + * and for that it calls i2400ms_bus_bm_wait_for_ack(). * - * This will poll the device for data until it is received. We need to - * receive at least as much bytes as where asked for (although it'll - * always be a multiple of 256 bytes). + * This checks if there is any data available (RX size > 0); if not, + * waits for the IRQ handler to notify about it. Once there is data, + * it is read and passed to the caller. Doing it this way we don't + * need much coordination/locking, and it makes it much more difficult + * for an interrupt to be lost and the wait_for_ack() function getting + * stuck even when data is pending. */ #include <linux/mmc/sdio_func.h> #include "i2400m-sdio.h" @@ -78,6 +88,7 @@ #define D_SUBMODULE fw #include "sdio-debug-levels.h" + /* * Send a boot-mode command to the SDIO function * @@ -139,7 +150,7 @@ error_too_big: /* - * Read an ack from the device's boot-mode (polling) + * Read an ack from the device's boot-mode * * @i2400m: * @_ack: pointer to where to store the read data @@ -150,75 +161,49 @@ error_too_big: * The ACK for a BM command is always at least sizeof(*ack) bytes, so * check for that. We don't need to check for device reboots * - * NOTE: We do an artificial timeout of 1 sec over the SDIO timeout; - * this way we have control over it...there is no way that I know - * of setting an SDIO transaction timeout. */ ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m, struct i2400m_bootrom_header *ack, size_t ack_size) { - int result; - ssize_t rx_size; - u64 timeout; + ssize_t result; struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m); struct sdio_func *func = i2400ms->func; struct device *dev = &func->dev; + int size; BUG_ON(sizeof(*ack) > ack_size); d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n", i2400m, ack, ack_size); - timeout = get_jiffies_64() + 2 * HZ; - sdio_claim_host(func); - while (1) { - if (time_after64(get_jiffies_64(), timeout)) { - rx_size = -ETIMEDOUT; - dev_err(dev, "timeout waiting for ack data\n"); - goto error_timedout; - } + spin_lock(&i2400m->rx_lock); + i2400ms->bm_ack_size = -EINPROGRESS; + spin_unlock(&i2400m->rx_lock); - /* Find the RX size, check if it fits or not -- it if - * doesn't fit, fail, as we have no way to dispose of - * the extra data. */ - rx_size = __i2400ms_rx_get_size(i2400ms); - if (rx_size < 0) - goto error_rx_get_size; - result = -ENOSPC; /* Check it fits */ - if (rx_size < sizeof(*ack)) { - rx_size = -EIO; - dev_err(dev, "HW BUG? received is too small (%zu vs " - "%zu needed)\n", sizeof(*ack), rx_size); - goto error_too_small; - } - if (rx_size > I2400M_BM_ACK_BUF_SIZE) { - dev_err(dev, "SW BUG? BM_ACK_BUF is too small (%u vs " - "%zu needed)\n", I2400M_BM_ACK_BUF_SIZE, - rx_size); - goto error_too_small; - } + result = wait_event_timeout(i2400ms->bm_wfa_wq, + i2400ms->bm_ack_size != -EINPROGRESS, + 2 * HZ); + if (result == 0) { + result = -ETIMEDOUT; + dev_err(dev, "BM: error waiting for an ack\n"); + goto error_timeout; + } - /* Read it */ - result = sdio_memcpy_fromio(func, i2400m->bm_ack_buf, - I2400MS_DATA_ADDR, rx_size); - if (result == -ETIMEDOUT || result == -ETIME) - continue; - if (result < 0) { - dev_err(dev, "BM SDIO receive (%zu B) failed: %d\n", - rx_size, result); - goto error_read; - } else - break; + spin_lock(&i2400m->rx_lock); + result = i2400ms->bm_ack_size; + BUG_ON(result == -EINPROGRESS); + if (result < 0) /* so we exit when rx_release() is called */ + dev_err(dev, "BM: %s failed: %zd\n", __func__, result); + else { + size = min(ack_size, i2400ms->bm_ack_size); + memcpy(ack, i2400m->bm_ack_buf, size); } - rx_size = min((ssize_t)ack_size, rx_size); - memcpy(ack, i2400m->bm_ack_buf, rx_size); -error_read: -error_too_small: -error_rx_get_size: -error_timedout: - sdio_release_host(func); - d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %ld\n", - i2400m, ack, ack_size, (long) rx_size); - return rx_size; + i2400ms->bm_ack_size = -EINPROGRESS; + spin_unlock(&i2400m->rx_lock); + +error_timeout: + d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %zd\n", + i2400m, ack, ack_size, result); + return result; } diff --git a/drivers/net/wimax/i2400m/sdio-rx.c b/drivers/net/wimax/i2400m/sdio-rx.c index a3008b904f7..321beadf6e4 100644 --- a/drivers/net/wimax/i2400m/sdio-rx.c +++ b/drivers/net/wimax/i2400m/sdio-rx.c @@ -69,6 +69,13 @@ #define D_SUBMODULE rx #include "sdio-debug-levels.h" +static const __le32 i2400m_ACK_BARKER[4] = { + __constant_cpu_to_le32(I2400M_ACK_BARKER), + __constant_cpu_to_le32(I2400M_ACK_BARKER), + __constant_cpu_to_le32(I2400M_ACK_BARKER), + __constant_cpu_to_le32(I2400M_ACK_BARKER) +}; + /* * Read and return the amount of bytes available for RX @@ -131,25 +138,35 @@ void i2400ms_rx(struct i2400ms *i2400ms) ret = rx_size; goto error_get_size; } + ret = -ENOMEM; skb = alloc_skb(rx_size, GFP_ATOMIC); if (NULL == skb) { dev_err(dev, "RX: unable to alloc skb\n"); goto error_alloc_skb; } - ret = sdio_memcpy_fromio(func, skb->data, I2400MS_DATA_ADDR, rx_size); if (ret < 0) { dev_err(dev, "RX: SDIO data read failed: %d\n", ret); goto error_memcpy_fromio; } - /* Check if device has reset */ - if (!memcmp(skb->data, i2400m_NBOOT_BARKER, - sizeof(i2400m_NBOOT_BARKER)) - || !memcmp(skb->data, i2400m_SBOOT_BARKER, - sizeof(i2400m_SBOOT_BARKER))) { + + rmb(); /* make sure we get boot_mode from dev_reset_handle */ + if (i2400m->boot_mode == 1) { + spin_lock(&i2400m->rx_lock); + i2400ms->bm_ack_size = rx_size; + spin_unlock(&i2400m->rx_lock); + memcpy(i2400m->bm_ack_buf, skb->data, rx_size); + wake_up(&i2400ms->bm_wfa_wq); + dev_err(dev, "RX: SDIO boot mode message\n"); + kfree_skb(skb); + } else if (unlikely(!memcmp(skb->data, i2400m_NBOOT_BARKER, + sizeof(i2400m_NBOOT_BARKER)) + || !memcmp(skb->data, i2400m_SBOOT_BARKER, + sizeof(i2400m_SBOOT_BARKER)))) { ret = i2400m_dev_reset_handle(i2400m); + dev_err(dev, "RX: SDIO reboot barker\n"); kfree_skb(skb); } else { skb_put(skb, rx_size); @@ -179,7 +196,6 @@ void i2400ms_irq(struct sdio_func *func) { int ret; struct i2400ms *i2400ms = sdio_get_drvdata(func); - struct i2400m *i2400m = &i2400ms->i2400m; struct device *dev = &func->dev; int val; @@ -194,10 +210,7 @@ void i2400ms_irq(struct sdio_func *func) goto error_no_irq; } sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret); - if (WARN_ON(i2400m->boot_mode != 0)) - dev_err(dev, "RX: SW BUG? boot mode and IRQ is up?\n"); - else - i2400ms_rx(i2400ms); + i2400ms_rx(i2400ms); error_no_irq: d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms); return; @@ -214,8 +227,15 @@ int i2400ms_rx_setup(struct i2400ms *i2400ms) int result; struct sdio_func *func = i2400ms->func; struct device *dev = &func->dev; + struct i2400m *i2400m = &i2400ms->i2400m; d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms); + + init_waitqueue_head(&i2400ms->bm_wfa_wq); + spin_lock(&i2400m->rx_lock); + i2400ms->bm_wait_result = -EINPROGRESS; + spin_unlock(&i2400m->rx_lock); + sdio_claim_host(func); result = sdio_claim_irq(func, i2400ms_irq); if (result < 0) { @@ -245,8 +265,13 @@ void i2400ms_rx_release(struct i2400ms *i2400ms) int result; struct sdio_func *func = i2400ms->func; struct device *dev = &func->dev; + struct i2400m *i2400m = &i2400ms->i2400m; d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms); + spin_lock(&i2400m->rx_lock); + i2400ms->bm_ack_size = -EINTR; + spin_unlock(&i2400m->rx_lock); + wake_up_all(&i2400ms->bm_wfa_wq); sdio_claim_host(func); sdio_writeb(func, 0, I2400MS_INTR_ENABLE_ADDR, &result); sdio_release_irq(func); diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c index 5ac5e76701c..2538825d1c6 100644 --- a/drivers/net/wimax/i2400m/sdio.c +++ b/drivers/net/wimax/i2400m/sdio.c @@ -78,6 +78,14 @@ static const char *i2400ms_bus_fw_names[] = { }; +static const struct i2400m_poke_table i2400ms_pokes[] = { + I2400M_FW_POKE(0x6BE260, 0x00000088), + I2400M_FW_POKE(0x080550, 0x00000005), + I2400M_FW_POKE(0xAE0000, 0x00000000), + I2400M_FW_POKE(0x000000, 0x00000000), /* MUST be 0 terminated or bad + * things will happen */ +}; + /* * Enable the SDIO function * @@ -148,19 +156,14 @@ int i2400ms_bus_dev_start(struct i2400m *i2400m) d_fnstart(3, dev, "(i2400m %p)\n", i2400m); msleep(200); - result = i2400ms_rx_setup(i2400ms); - if (result < 0) - goto error_rx_setup; result = i2400ms_tx_setup(i2400ms); if (result < 0) goto error_tx_setup; d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result); return result; - i2400ms_tx_release(i2400ms); error_tx_setup: - i2400ms_rx_release(i2400ms); -error_rx_setup: + i2400ms_tx_release(i2400ms); d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); return result; } @@ -174,7 +177,6 @@ void i2400ms_bus_dev_stop(struct i2400m *i2400m) struct device *dev = &func->dev; d_fnstart(3, dev, "(i2400m %p)\n", i2400m); - i2400ms_rx_release(i2400ms); i2400ms_tx_release(i2400ms); d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); } @@ -255,7 +257,7 @@ error_kzalloc: static int i2400ms_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt) { - int result; + int result = 0; struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m); struct device *dev = i2400m_dev(i2400m); @@ -280,8 +282,25 @@ int i2400ms_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt) sizeof(i2400m_COLD_BOOT_BARKER)); else if (rt == I2400M_RT_BUS) { do_bus_reset: - dev_err(dev, "FIXME: SDIO bus reset not implemented\n"); - result = rt == I2400M_RT_WARM ? -ENODEV : -ENOSYS; + /* call netif_tx_disable() before sending IOE disable, + * so that all the tx from network layer are stopped + * while IOE is being reset. Make sure it is called + * only after register_netdev() was issued. + */ + if (i2400m->wimax_dev.net_dev->reg_state == NETREG_REGISTERED) + netif_tx_disable(i2400m->wimax_dev.net_dev); + + i2400ms_rx_release(i2400ms); + sdio_claim_host(i2400ms->func); + sdio_disable_func(i2400ms->func); + sdio_release_host(i2400ms->func); + + /* Wait for the device to settle */ + msleep(40); + + result = i2400ms_enable_function(i2400ms->func); + if (result >= 0) + i2400ms_rx_setup(i2400ms); } else BUG(); if (result < 0 && rt != I2400M_RT_BUS) { @@ -404,24 +423,32 @@ int i2400ms_probe(struct sdio_func *func, i2400m->bus_dev_stop = i2400ms_bus_dev_stop; i2400m->bus_tx_kick = i2400ms_bus_tx_kick; i2400m->bus_reset = i2400ms_bus_reset; + /* The iwmc3200-wimax sometimes requires the driver to try + * hard when we paint it into a corner. */ + i2400m->bus_bm_retries = I3200_BOOT_RETRIES; i2400m->bus_bm_cmd_send = i2400ms_bus_bm_cmd_send; i2400m->bus_bm_wait_for_ack = i2400ms_bus_bm_wait_for_ack; i2400m->bus_fw_names = i2400ms_bus_fw_names; i2400m->bus_bm_mac_addr_impaired = 1; - - result = i2400ms_enable_function(i2400ms->func); - if (result < 0) { - dev_err(dev, "Cannot enable SDIO function: %d\n", result); - goto error_func_enable; - } + i2400m->bus_bm_pokes_table = &i2400ms_pokes[0]; sdio_claim_host(func); result = sdio_set_block_size(func, I2400MS_BLK_SIZE); + sdio_release_host(func); if (result < 0) { dev_err(dev, "Failed to set block size: %d\n", result); goto error_set_blk_size; } - sdio_release_host(func); + + result = i2400ms_enable_function(i2400ms->func); + if (result < 0) { + dev_err(dev, "Cannot enable SDIO function: %d\n", result); + goto error_func_enable; + } + + result = i2400ms_rx_setup(i2400ms); + if (result < 0) + goto error_rx_setup; result = i2400m_setup(i2400m, I2400M_BRI_NO_REBOOT); if (result < 0) { @@ -440,12 +467,14 @@ int i2400ms_probe(struct sdio_func *func, error_debugfs_add: i2400m_release(i2400m); error_setup: - sdio_set_drvdata(func, NULL); + i2400ms_rx_release(i2400ms); +error_rx_setup: sdio_claim_host(func); -error_set_blk_size: sdio_disable_func(func); sdio_release_host(func); error_func_enable: +error_set_blk_size: + sdio_set_drvdata(func, NULL); free_netdev(net_dev); error_alloc_netdev: return result; @@ -462,6 +491,7 @@ void i2400ms_remove(struct sdio_func *func) d_fnstart(3, dev, "SDIO func %p\n", func); debugfs_remove_recursive(i2400ms->debugfs_dentry); + i2400ms_rx_release(i2400ms); i2400m_release(i2400m); sdio_set_drvdata(func, NULL); sdio_claim_host(func); diff --git a/drivers/net/wimax/i2400m/tx.c b/drivers/net/wimax/i2400m/tx.c index 613a88ffd65..fa16ccf8e26 100644 --- a/drivers/net/wimax/i2400m/tx.c +++ b/drivers/net/wimax/i2400m/tx.c @@ -278,6 +278,48 @@ enum { #define TAIL_FULL ((void *)~(unsigned long)NULL) /* + * Calculate how much tail room is available + * + * Note the trick here. This path is ONLY caleed for Case A (see + * i2400m_tx_fifo_push() below), where we have: + * + * Case A + * N ___________ + * | tail room | + * | | + * |<- IN ->| + * | | + * | data | + * | | + * |<- OUT ->| + * | | + * | head room | + * 0 ----------- + * + * When calculating the tail_room, tx_in might get to be zero if + * i2400m->tx_in is right at the end of the buffer (really full + * buffer) if there is no head room. In this case, tail_room would be + * I2400M_TX_BUF_SIZE, although it is actually zero. Hence the final + * mod (%) operation. However, when doing this kind of optimization, + * i2400m->tx_in being zero would fail, so we treat is an a special + * case. + */ +static inline +size_t __i2400m_tx_tail_room(struct i2400m *i2400m) +{ + size_t tail_room; + size_t tx_in; + + if (unlikely(i2400m->tx_in) == 0) + return I2400M_TX_BUF_SIZE; + tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE; + tail_room = I2400M_TX_BUF_SIZE - tx_in; + tail_room %= I2400M_TX_BUF_SIZE; + return tail_room; +} + + +/* * Allocate @size bytes in the TX fifo, return a pointer to it * * @i2400m: device descriptor @@ -338,7 +380,7 @@ void *i2400m_tx_fifo_push(struct i2400m *i2400m, size_t size, size_t padding) return NULL; } /* Is there space at the tail? */ - tail_room = I2400M_TX_BUF_SIZE - i2400m->tx_in % I2400M_TX_BUF_SIZE; + tail_room = __i2400m_tx_tail_room(i2400m); if (tail_room < needed_size) { if (i2400m->tx_out % I2400M_TX_BUF_SIZE < i2400m->tx_in % I2400M_TX_BUF_SIZE) { @@ -367,17 +409,29 @@ void *i2400m_tx_fifo_push(struct i2400m *i2400m, size_t size, size_t padding) * (I2400M_PL_PAD for the payloads, I2400M_TX_PLD_SIZE for the * header). * + * Tail room can get to be zero if a message was opened when there was + * space only for a header. _tx_close() will mark it as to-skip (as it + * will have no payloads) and there will be no more space to flush, so + * nothing has to be done here. This is probably cheaper than ensuring + * in _tx_new() that there is some space for payloads...as we could + * always possibly hit the same problem if the payload wouldn't fit. + * * Note: * * Assumes i2400m->tx_lock is taken, and we use that as a barrier + * + * This path is only taken for Case A FIFO situations [see + * i2400m_tx_fifo_push()] */ static void i2400m_tx_skip_tail(struct i2400m *i2400m) { struct device *dev = i2400m_dev(i2400m); size_t tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE; - size_t tail_room = I2400M_TX_BUF_SIZE - tx_in; + size_t tail_room = __i2400m_tx_tail_room(i2400m); struct i2400m_msg_hdr *msg = i2400m->tx_buf + tx_in; + if (unlikely(tail_room == 0)) + return; BUG_ON(tail_room < sizeof(*msg)); msg->size = tail_room | I2400M_TX_SKIP; d_printf(2, dev, "skip tail: skipping %zu bytes @%zu\n", @@ -474,10 +528,18 @@ void i2400m_tx_close(struct i2400m *i2400m) struct i2400m_msg_hdr *tx_msg_moved; size_t aligned_size, padding, hdr_size; void *pad_buf; + unsigned num_pls; if (tx_msg->size & I2400M_TX_SKIP) /* a skipper? nothing to do */ goto out; - + num_pls = le16_to_cpu(tx_msg->num_pls); + /* We can get this situation when a new message was started + * and there was no space to add payloads before hitting the + tail (and taking padding into consideration). */ + if (num_pls == 0) { + tx_msg->size |= I2400M_TX_SKIP; + goto out; + } /* Relocate the message header * * Find the current header size, align it to 16 and if we need @@ -491,7 +553,7 @@ void i2400m_tx_close(struct i2400m *i2400m) */ hdr_size = sizeof(*tx_msg) + le16_to_cpu(tx_msg->num_pls) * sizeof(tx_msg->pld[0]); - hdr_size = ALIGN(hdr_size, I2400M_PL_PAD); + hdr_size = ALIGN(hdr_size, I2400M_PL_ALIGN); tx_msg->offset = I2400M_TX_PLD_SIZE - hdr_size; tx_msg_moved = (void *) tx_msg + tx_msg->offset; memmove(tx_msg_moved, tx_msg, hdr_size); @@ -574,7 +636,7 @@ int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len, d_fnstart(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u)\n", i2400m, buf, buf_len, pl_type); - padded_len = ALIGN(buf_len, I2400M_PL_PAD); + padded_len = ALIGN(buf_len, I2400M_PL_ALIGN); d_printf(5, dev, "padded_len %zd buf_len %zd\n", padded_len, buf_len); /* If there is no current TX message, create one; if the * current one is out of payload slots or we have a singleton, @@ -591,6 +653,8 @@ try_new: i2400m_tx_close(i2400m); i2400m_tx_new(i2400m); } + if (i2400m->tx_msg == NULL) + goto error_tx_new; if (i2400m->tx_msg->size + padded_len > I2400M_TX_BUF_SIZE / 2) { d_printf(2, dev, "TX: message too big, going new\n"); i2400m_tx_close(i2400m); @@ -773,7 +837,6 @@ void i2400m_tx_msg_sent(struct i2400m *i2400m) n = i2400m->tx_out / I2400M_TX_BUF_SIZE; i2400m->tx_out %= I2400M_TX_BUF_SIZE; i2400m->tx_in -= n * I2400M_TX_BUF_SIZE; - netif_start_queue(i2400m->wimax_dev.net_dev); spin_unlock_irqrestore(&i2400m->tx_lock, flags); d_fnend(3, dev, "(i2400m %p) = void\n", i2400m); } diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c index 17851321b7f..cfdaf69da9d 100644 --- a/drivers/net/wimax/i2400m/usb.c +++ b/drivers/net/wimax/i2400m/usb.c @@ -254,8 +254,10 @@ do_bus_reset: dev_err(dev, "USB reset failed (%d), giving up!\n", result); } - } else + } else { + result = -EINVAL; /* shut gcc up in certain arches */ BUG(); + } if (result < 0 && result != -EINVAL /* device is gone */ && rt != I2400M_RT_BUS) { @@ -399,6 +401,7 @@ int i2400mu_probe(struct usb_interface *iface, i2400m->bus_dev_stop = i2400mu_bus_dev_stop; i2400m->bus_tx_kick = i2400mu_bus_tx_kick; i2400m->bus_reset = i2400mu_bus_reset; + i2400m->bus_bm_retries = I2400M_BOOT_RETRIES; i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send; i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack; i2400m->bus_fw_names = i2400mu_bus_fw_names; |