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[SCSI] isci: initial sgpio write support

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Basic support to initialize the gpio unit, accept an incomming
SAS_GPIO_REG_TX_GP bitstream, and translate it to the ODx.n fields in
the hardware registers.  If register indexes outside the supported range
are specified in the SMP frame we simply accept the write and return how
many registers (SFF-8485) were written (libsas reports this as residue
in the request).

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams
2011-09-01 21:18:31 -07:00
committed by James Bottomley
parent 13257cfbc5
commit ad4f4c1de8
3 changed files with 87 additions and 0 deletions
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15
drivers/scsi/isci/host.h
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@@ -440,6 +440,18 @@ static inline bool is_c0(struct pci_dev *pdev)
return false;
}
/* set hw control for 'activity', even though active enclosures seem to drive
* the activity led on their own. Skip setting FSENG control on 'status' due
* to unexpected operation and 'error' due to not being a supported automatic
* FSENG output
*/
#define SGPIO_HW_CONTROL 0x00000443
static inline int isci_gpio_count(struct isci_host *ihost)
{
return ARRAY_SIZE(ihost->scu_registers->peg0.sgpio.output_data_select);
}
void sci_controller_post_request(struct isci_host *ihost,
u32 request);
void sci_controller_release_frame(struct isci_host *ihost,
@@ -542,4 +554,7 @@ void sci_port_configuration_agent_construct(
enum sci_status sci_port_configuration_agent_initialize(
struct isci_host *ihost,
struct sci_port_configuration_agent *port_agent);
int isci_gpio_write(struct sas_ha_struct *, u8 reg_type, u8 reg_index,
u8 reg_count, u8 *write_data);
#endif