#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
static int whc_update_di(struct whc *whc, int idx)
{
int offset = idx / 32;
u32 bit = 1 << (idx % 32);
le_writel(bit, whc->base + WUSBDIBUPDATED + offset);
return whci_wait_for(&whc->umc->dev,
whc->base + WUSBDIBUPDATED + offset, bit, 0,
100, "DI update");
}
/*
* WHCI starts MMCs based on there being a valid GTK so these need
* only start/stop the asynchronous and periodic schedules and send a
* channel stop command.
*/
int whc_wusbhc_start(struct wusbhc *wusbhc)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
asl_start(whc);
pzl_start(whc);
return 0;
}
void whc_wusbhc_stop(struct wusbhc *wusbhc, int delay)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 stop_time, now_time;
int ret;
pzl_stop(whc);
asl_stop(whc);
now_time = le_readl(whc->base + WUSBTIME) & WUSBTIME_CHANNEL_TIME_MASK;
stop_time = (now_time + ((delay * 8) << 7)) & 0x00ffffff;
ret = whc_do_gencmd(whc, WUSBGENCMDSTS_CHAN_STOP, stop_time, NULL, 0);
if (ret == 0)
msleep(delay);
}
int whc_mmcie_add(struct wusbhc *wusbhc, u8 interval, u8 repeat_cnt,
u8 handle, struct wuie_hdr *wuie)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = (interval << 24)
| (repeat_cnt << 16)
| (wuie->bLength << 8)
| handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_ADD, params, wuie, wuie->bLength);
}
int whc_mmcie_rm(struct wusbhc *wusbhc, u8 handle)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 params;
params = handle;
return whc_do_gencmd(whc, WUSBGENCMDSTS_MMCIE_RM, params, NULL, 0);
}
int whc_bwa_set(struct wusbhc *wusbhc, s8 stream_index, const struct uwb_mas_bm *mas_bm)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
if (stream_index >= 0)
whc_write_wusbcmd(whc, WUSBCMD_WUSBSI_MASK, WUSBCMD_WUSBSI(stream_index));
return whc_do_gencmd(whc, WUSBGENCMDSTS_SET_MAS, 0, (void *)mas_bm, sizeof(*mas_bm));
}
int whc_dev_info_set(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int idx = wusb_dev->port_idx;
struct di_buf_entry *di = &whc->di_buf[idx];
int ret;
mutex_lock(&whc->mutex);
uwb_mas_bm_copy_le(di->availability_info, &wusb_dev->availability);
di->addr_sec_info &= ~(WHC_DI_DISABLE | WHC_DI_DEV_ADDR_MASK);
di->addr_sec_info |= WHC_DI_DEV_ADDR(wusb_dev->addr);
ret = whc_update_di(whc, idx);
mutex_unlock(&whc->mutex);
return ret;
}
/*
* Set the number of Device Notification Time Slots (DNTS) and enable
* device notifications.
*/
int whc_set_num_dnts(struct wusbhc *wusbhc, u8 interval, u8 slots)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 dntsctrl;
dntsctrl = WUSBDNTSCTRL_ACTIVE
| WUSBDNTSCTRL_INTERVAL(interval)
| WUSBDNTSCTRL_SLOTS(slots);
le_writel(dntsctrl, whc->base + WUSBDNTSCTRL);
return 0;
}
static int whc_set_key(struct whc *whc, u8 key_index, uint32_t tkid,
const void *key, size_t key_size, bool is_gtk)
{
uint32_t setkeycmd;
uint32_t seckey[4];
int i;
int ret;
memcpy(seckey, key, key_size);
setkeycmd = WUSBSETSECKEYCMD_SET | WUSBSETSECKEYCMD_IDX(key_index);
if (is_gtk)
setkeycmd |= WUSBSETSECKEYCMD_GTK;
le_writel(tkid, whc->base + WUSBTKID);
for (i = 0; i < 4; i++)
le_writel(seckey[i], whc->base + WUSBSECKEY + 4*i);
le_writel(setkeycmd, whc->base + WUSBSETSECKEYCMD);
ret = whci_wait_for(&whc->umc->dev, whc->base + WUSBSETSECKEYCMD,
WUSBSETSECKEYCMD_SET, 0, 100, "set key");
return ret;
}
/**
* whc_set_ptk - set the PTK to use for a device.
*
* The index into the key table for this PTK is the same as the
* device's port index.
*/
int whc_set_ptk(struct wusbhc *wusbhc, u8 port_idx, u32 tkid,
const void *ptk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
struct di_buf_entry *di = &whc->di_buf[port_idx];
int ret;
mutex_lock(&whc->mutex);
if (ptk) {
ret = whc_set_key(whc, port_idx, tkid, ptk, key_size, false);
if (ret)
goto out;
di->addr_sec_info &= ~WHC_DI_KEY_IDX_MASK;
di->addr_sec_info |= WHC_DI_SECURE | WHC_DI_KEY_IDX(port_idx);
} else
di->addr_sec_info &= ~WHC_DI_SECURE;
ret = whc_update_di(whc, port_idx);
out:
mutex_unlock(&whc->mutex);
return ret;
}
/**
* whc_set_gtk - set the GTK for subsequent broadcast packets
*
* The GTK is stored in the last entry in the key table (the previous
* N_DEVICES entries are for the per-device PTKs).
*/
int whc_set_gtk(struct wusbhc *wusbhc, u32 tkid,
const void *gtk, size_t key_size)
{
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
mutex_lock(&whc->mutex);
ret = whc_set_key(whc, whc->n_devices, tkid, gtk, key_size, true);
mutex_unlock(&whc->mutex);
return ret;
}
int whc_set_cluster_id(struct whc *whc, u8 bcid)
{
whc_write_wusbcmd(whc, WUSBCMD_BCID_MASK, WUSBCMD_BCID(bcid));
return 0;
}
774dd412a465896d08d59a81a345c1e4 (diff)| parent | 047487241ff59374fded8c477f21453681f5995c (diff) |
|---|
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says:
====================
sparc64: Recover from userspace non-resumable PIO & MEM errors
A non-resumable error from userspace is able to cause a kernel panic or trap
loop due to the setup and handling of the queued traps once in the kernel.
This patch series addresses both of these issues.
The queues are fixed by simply zeroing the memory before use.
PIO errors from userspace will result in a SIGBUS being sent to the user
process.
The MEM errors form userspace will result in a SIGKILL and also cause the
offending pages to be claimed so they are no longer used in future tasks.
SIGKILL is used to ensure that the process does not try to coredump and result
in an attempt to read the memory again from within kernel space. Although
there is a HV call to scrub the memory (mem_scrub), there is no easy way to
guarantee that the real memory address(es) are not used by other tasks.
Clearing the error with mem_scrub would zero the memory and cause the other
processes to proceed with bad data.
The handling of other non-resumable errors remain unchanged and will cause a
panic.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>