lkml.org 
[lkml]   [2003]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [BUG] e100 driver fails to initialize the hardware after ker nel bootup through kexec
Date
On Sat, 2003-01-25 at 00:07, Jeff Garzik wrote:
On Fri, Jan 24, 2003 at 05:57:55PM +0300, Andrey Nekrasov wrote:
> > or "e100" driver and with patch:
> >
> >
> > --- drivers/net/e100/e100.h- Wed Dec 4 15:16:08 2002
> > +++ drivers/net/e100/e100.h Wed Dec 4 15:16:20 2002
> > @@ -100,7 +100,7 @@
> >
> > #define E100_MAX_NIC 16
> >
> > -#define E100_MAX_SCB_WAIT 100 /* Max udelays in wait_scb */
> > +#define E100_MAX_SCB_WAIT 5000 /* Max udelays in wait_scb */
> > #define E100_MAX_CU_IDLE_WAIT 50 /* Max udelays in wait_cus_idle
*/
>
>
>
>
> No, don't use this patch, it's awful. The latest Marcelo tree in
> BitKeeper has this fixed... the right way. See the following e100
> patch, which is what Intel emailed me, and what I merged into the
> Marcelo tree.
>
> Jeff
>
>
>
>
> # --------------------------------------------
> # 03/01/16 scott.feldman@intel.com 1.884.23.2
> # [netdrvr e100] udelay a better way
> # * Bug Fix: TCO workaround after hard reset of controller to wait for TCO
> # traffic to settle. Workaround requires issuing a CU load base command
> # after hard reset, followed by a wait for scb and finally a wait for
> # TCO traffic bit to clear. Affects 82559s and above wired to SMBus.
> # --------------------------------------------
> #
> diff -Nru a/drivers/net/e100/e100_main.c b/drivers/net/e100/e100_main.c
> --- a/drivers/net/e100/e100_main.c Fri Jan 24 11:06:35 2003
> +++ b/drivers/net/e100/e100_main.c Fri Jan 24 11:06:35 2003
> @@ -196,6 +196,7 @@
> char *e100_get_brand_msg(struct e100_private *);
> static u8 e100_pci_setup(struct pci_dev *, struct e100_private *);
> static u8 e100_sw_init(struct e100_private *);
> +static void e100_tco_walkaround(struct e100_private *);
> static unsigned char e100_alloc_space(struct e100_private *);
> static void e100_dealloc_space(struct e100_private *);
> static int e100_alloc_tcb_pool(struct e100_private *);
> @@ -213,7 +214,7 @@
>
> static unsigned char e100_clr_cntrs(struct e100_private *);
> static unsigned char e100_load_microcode(struct e100_private *);
> -static unsigned char e100_hw_init(struct e100_private *, u32);
> +static unsigned char e100_hw_init(struct e100_private *);
> static unsigned char e100_setup_iaaddr(struct e100_private *, u8 *);
> static unsigned char e100_update_stats(struct e100_private *bdp);
>
> @@ -1265,7 +1266,7 @@
> /* read NIC's part number */
> e100_rd_pwa_no(bdp);
>
> - if (!e100_hw_init(bdp, PORT_SOFTWARE_RESET)) {
> + if (!e100_hw_init(bdp)) {
> printk(KERN_ERR "e100: hw init failed\n");
> return false;
> }
> @@ -1314,10 +1315,46 @@
> return 1;
> }
>
> +static void __devinit
> +e100_tco_walkaround(struct e100_private *bdp)
> +{
> + int i;
> +
> + /* Do software reset */
> + e100_sw_reset(bdp, PORT_SOFTWARE_RESET);
> +
> + /* Do a dummy LOAD CU BASE command. */
> + /* This gets us out of pre-driver to post-driver. */
> + e100_exec_cmplx(bdp, 0, SCB_CUC_LOAD_BASE);
> +
> + /* Wait 20 msec for reset to take effect */
> + set_current_state(TASK_UNINTERRUPTIBLE);
> + schedule_timeout(HZ / 50);
> +
> + /* disable interrupts since they are enabled */
> + /* after device reset */
> + e100_disable_clear_intr(bdp);
> +
> + /* Wait for command to be cleared up to 1 sec */
> + for (i=0; i<1000; i++) {
> + if (!readb(&bdp->scb->scb_cmd_low))
> + break;
> + set_current_state(TASK_UNINTERRUPTIBLE);
> + schedule_timeout(HZ / 1000);
> + }
> +
> + /* Wait for TCO request bit in PMDR register to be clear */
> + for (i=0; i<500; i++) {
> + if (!(readb(&bdp->scb->scb_ext.d101m_scb.scb_pmdr) & BIT_1))
> + break;
> + set_current_state(TASK_UNINTERRUPTIBLE);
> + schedule_timeout(HZ / 1000);
> + }
> +}
> +
> /**
> * e100_hw_init - initialized tthe hardware
> * @bdp: atapter's private data struct
> - * @reset_cmd: s/w reset or selective reset
> *
> * This routine performs a reset on the adapter, and configures the
adapter.
> * This includes configuring the 82557 LAN controller, validating and
setting
> @@ -1329,13 +1366,16 @@
> * false - If the adapter failed initialization
> */
> unsigned char __devinit
> -e100_hw_init(struct e100_private *bdp, u32 reset_cmd)
> +e100_hw_init(struct e100_private *bdp)
> {
> if (!e100_phy_init(bdp))
> return false;
>
> - /* Issue a software reset to the e100 */
> - e100_sw_reset(bdp, reset_cmd);
> + e100_sw_reset(bdp, PORT_SELECTIVE_RESET);
> +
> + /* Only 82559 or above needs TCO walkaround */
> + if (bdp->rev_id >= D101MA_REV_ID)
> + e100_tco_walkaround(bdp);
>
> /* Load the CU BASE (set to 0, because we use linear mode) */
> if (!e100_wait_exec_cmplx(bdp, 0, SCB_CUC_LOAD_BASE, 0))
>

Jeff,

Which release your patch applies for ? I failed to compile it on 2.5.52. It
seems that function e100_disable_clear_intr is not defined.


Michael
Not speaking for Intel, options are my own.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:32    [W:0.064 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site