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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: John Garry <john.garry@huawei.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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2 changed files with 27 additions and 0 deletions
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@ -66,6 +66,10 @@ struct hisi_hba {
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int n_phy;
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int slot_index_count;
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unsigned long *slot_index_tags;
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/* SCSI/SAS glue */
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struct sas_ha_struct sha;
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struct Scsi_Host *shost;
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@ -12,6 +12,21 @@
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#include "hisi_sas.h"
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#define DRV_NAME "hisi_sas"
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static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
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{
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void *bitmap = hisi_hba->slot_index_tags;
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clear_bit(slot_idx, bitmap);
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}
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static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
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{
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int i;
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for (i = 0; i < hisi_hba->slot_index_count; ++i)
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hisi_sas_slot_index_clear(hisi_hba, i);
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}
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static struct scsi_transport_template *hisi_sas_stt;
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static struct scsi_host_template hisi_sas_sht = {
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@ -102,6 +117,12 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
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memset(hisi_hba->breakpoint, 0, s);
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hisi_hba->slot_index_count = HISI_SAS_COMMAND_ENTRIES;
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s = hisi_hba->slot_index_count / sizeof(unsigned long);
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hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
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if (!hisi_hba->slot_index_tags)
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goto err_out;
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hisi_hba->sge_page_pool = dma_pool_create("status_sge", dev,
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sizeof(struct hisi_sas_sge_page), 16, 0);
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if (!hisi_hba->sge_page_pool)
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@ -121,6 +142,8 @@ static int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
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goto err_out;
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memset(hisi_hba->sata_breakpoint, 0, s);
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hisi_sas_slot_index_init(hisi_hba);
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return 0;
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err_out:
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return -ENOMEM;
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