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Commit 257efd1f authored by John Garry's avatar John Garry Committed by Martin K. Petersen
Browse files

hisi_sas: Add slot init code 



Add functionality to init slot indexing.

Slot indexing is for the host to track which slots (or tags) are free
and which are used.

Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 89d53322

drivers/scsi/hisi_sas/hisi_sas.h

+4 −0
Original line number Diff line number Diff line
@@ -66,6 +66,10 @@ struct hisi_hba { 


	int n_phy;





	int slot_index_count;

	unsigned long *slot_index_tags;



	/* SCSI/SAS glue */

	struct sas_ha_struct sha;

	struct Scsi_Host *shost;

drivers/scsi/hisi_sas/hisi_sas_main.c

+23 −0
Original line number Diff line number Diff line
@@ -12,6 +12,21 @@ 
#include "hisi_sas.h"

#define DRV_NAME "hisi_sas"



static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)

{

	void *bitmap = hisi_hba->slot_index_tags;



	clear_bit(slot_idx, bitmap);

}



static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)

{

	int i;



	for (i = 0; i < hisi_hba->slot_index_count; ++i)

		hisi_sas_slot_index_clear(hisi_hba, i);

}



static struct scsi_transport_template *hisi_sas_stt;



static struct scsi_host_template hisi_sas_sht = {
@@ -102,6 +117,12 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost) 


	memset(hisi_hba->breakpoint, 0, s);



	hisi_hba->slot_index_count = HISI_SAS_COMMAND_ENTRIES;

	s = hisi_hba->slot_index_count / sizeof(unsigned long);

	hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);

	if (!hisi_hba->slot_index_tags)

		goto err_out;



	hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,

				sizeof(struct hisi_sas_sge_page), 16, 0);

	if (!hisi_hba->sge_page_pool)
@@ -121,6 +142,8 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost) 
		goto err_out;

	memset(hisi_hba->sata_breakpoint, 0, s);



	hisi_sas_slot_index_init(hisi_hba);



	return 0;

err_out:

	return -ENOMEM;