Hello, Loc.
On Fri, Feb 21, 2014 at 10:47:32AM -0700, Loc Ho wrote:
> +/**
> + * Custom Query ID command
> + *
> + * Due to HW errata, we must stop and re-start the port state machine after
> + * read ID command. Also disable support for DEVSLP as hardware don't support
> + * it.
> + */
Sorry about not being clear before but /** function comment means
something like
/**
* ata_scsi_port_error_handler - recover the port after the commands
* @host: SCSI host containing the port
* @ap: the ATA port
*
* Handle the recovery of the port @ap after all the commands have
* been recovered.
*/
> +static int xgene_ahci_do_hardreset(struct ata_link *link,
> + unsigned long deadline, bool *online)
> +{
> + const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
> + struct ata_port *ap = link->ap;
> + struct ahci_host_priv *hpriv = ap->host->private_data;
> + struct xgene_ahci_context *ctx = pdata_to_ctx(hpriv->plat_data);
> + struct ahci_port_priv *pp = ap->private_data;
> + u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
> + void __iomem *port_mmio = ahci_port_base(ap);
> + struct ata_taskfile tf;
> + int first_time = 1;
> + int rc;
> + u32 val;
> + int i;
> +
> +hardreset_retry:
> + /* clear D2H reception area to properly wait for D2H FIS */
> + ata_tf_init(link->device, &tf);
> + tf.command = ATA_BUSY;
> + ata_tf_to_fis(&tf, 0, 0, d2h_fis);
> + rc = sata_link_hardreset(link, timing, deadline, online,
> + ahci_check_ready);
> +
> + if (*online) {
> + /* Check to ensure that the disk comes up in matching speed */
> + if (first_time) {
> + u32 gen_speed;
> +
> + first_time = 0;
> + sata_scr_read(link, SCR_STATUS, &gen_speed);
> + gen_speed = (gen_speed >> 4) & 0xf;
> + if (gen_speed == 1 || gen_speed == 2) {
> + /*
> + * For Gen2/1 and first time, let's check again
> + * with Gen2/1 PHY to ensure actual Gen2/1 disk.
> + */
Can you please go back two reviews and re-read what I requested?
Also, if you're unsure, please don't hesitate to ask back. It's
usually a lot easier for both parties than iterating through patchsets
without properly understanding each other.
Thanks.
--
tejun
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