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scsi: pm80xx: Remove DMA memory allocation for ccb and device structures 

Remove DMA memory allocation for Devices and CCB structure. Instead
allocate memory outside of DMA memory.  DMA memory is a limited system
resource and it is better to allocate memory outside of DMA memory when
possible.

Link: https://lore.kernel.org/r/20201005145011.23674-3-Viswas.G@microchip.com.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Viswas G 2020-10-05 20:20:09 +05:30 committed by Martin K. Petersen
parent 05c6c029a4
commit 27bc43bd7c
2 changed files with 33 additions and 23 deletions
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8
drivers/scsi/pm8001/pm8001_defs.h
View File

@ -91,17 +91,15 @@ enum port_type {
#define PM8001_MAX_DEVICES 2048 /* max supported device */
#define PM8001_MAX_MSIX_VEC 64 /* max msi-x int for spcv/ve */
#define USI_MAX_MEMCNT_BASE 5
#define CONFIG_SCSI_PM8001_MAX_DMA_SG 528
#define PM8001_MAX_DMA_SG CONFIG_SCSI_PM8001_MAX_DMA_SG
enum memory_region_num {
AAP1 = 0x0, /* application acceleration processor */
IOP, /* IO processor */
NVMD, /* NVM device */
DEV_MEM, /* memory for devices */
CCB_MEM, /* memory for command control block */
FW_FLASH, /* memory for fw flash update */
FORENSIC_MEM /* memory for fw forensic data */
FORENSIC_MEM, /* memory for fw forensic data */
USI_MAX_MEMCNT_BASE
};
#define PM8001_EVENT_LOG_SIZE (128 * 1024)
@ -109,7 +107,7 @@ enum memory_region_num {
* maximum DMA memory regions(number of IBQ + number of IBQ CI
* + number of OBQ + number of OBQ PI)
*/
#define USI_MAX_MEMCNT (USI_MAX_MEMCNT_BASE + 1 + ((2 * PM8001_MAX_INB_NUM) \
#define USI_MAX_MEMCNT (USI_MAX_MEMCNT_BASE + ((2 * PM8001_MAX_INB_NUM) \
+ (2 * PM8001_MAX_OUTB_NUM)))
/*error code*/
enum mpi_err {

48
drivers/scsi/pm8001/pm8001_init.c
View File

@ -288,7 +288,7 @@ static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha,
count = pm8001_ha->max_q_num;
/* Queues are chosen based on the number of cores/msix availability */
ib_offset = pm8001_ha->ib_offset = USI_MAX_MEMCNT_BASE + 1;
ib_offset = pm8001_ha->ib_offset = USI_MAX_MEMCNT_BASE;
ci_offset = pm8001_ha->ci_offset = ib_offset + count;
ob_offset = pm8001_ha->ob_offset = ci_offset + count;
pi_offset = pm8001_ha->pi_offset = ob_offset + count;
@ -380,19 +380,6 @@ static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha,
pm8001_ha->memoryMap.region[NVMD].num_elements = 1;
pm8001_ha->memoryMap.region[NVMD].element_size = 4096;
pm8001_ha->memoryMap.region[NVMD].total_len = 4096;
/* Memory region for devices*/
pm8001_ha->memoryMap.region[DEV_MEM].num_elements = 1;
pm8001_ha->memoryMap.region[DEV_MEM].element_size = PM8001_MAX_DEVICES *
sizeof(struct pm8001_device);
pm8001_ha->memoryMap.region[DEV_MEM].total_len = PM8001_MAX_DEVICES *
sizeof(struct pm8001_device);
/* Memory region for ccb_info*/
pm8001_ha->memoryMap.region[CCB_MEM].num_elements = 1;
pm8001_ha->memoryMap.region[CCB_MEM].element_size = PM8001_MAX_CCB *
sizeof(struct pm8001_ccb_info);
pm8001_ha->memoryMap.region[CCB_MEM].total_len = PM8001_MAX_CCB *
sizeof(struct pm8001_ccb_info);
/* Memory region for fw flash */
pm8001_ha->memoryMap.region[FW_FLASH].total_len = 4096;
@ -416,18 +403,30 @@ static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha,
}
}
pm8001_ha->devices = pm8001_ha->memoryMap.region[DEV_MEM].virt_ptr;
/* Memory region for devices*/
pm8001_ha->devices = kzalloc(PM8001_MAX_DEVICES
* sizeof(struct pm8001_device), GFP_KERNEL);
if (!pm8001_ha->devices) {
rc = -ENOMEM;
goto err_out_nodev;
}
for (i = 0; i < PM8001_MAX_DEVICES; i++) {
pm8001_ha->devices[i].dev_type = SAS_PHY_UNUSED;
pm8001_ha->devices[i].id = i;
pm8001_ha->devices[i].device_id = PM8001_MAX_DEVICES;
pm8001_ha->devices[i].running_req = 0;
}
pm8001_ha->ccb_info = pm8001_ha->memoryMap.region[CCB_MEM].virt_ptr;
/* Memory region for ccb_info*/
pm8001_ha->ccb_info = kzalloc(PM8001_MAX_CCB
* sizeof(struct pm8001_ccb_info), GFP_KERNEL);
if (!pm8001_ha->ccb_info) {
rc = -ENOMEM;
goto err_out_noccb;
}
for (i = 0; i < PM8001_MAX_CCB; i++) {
pm8001_ha->ccb_info[i].ccb_dma_handle =
pm8001_ha->memoryMap.region[CCB_MEM].phys_addr +
i * sizeof(struct pm8001_ccb_info);
virt_to_phys(pm8001_ha->ccb_info) +
(i * sizeof(struct pm8001_ccb_info));
pm8001_ha->ccb_info[i].task = NULL;
pm8001_ha->ccb_info[i].ccb_tag = 0xffffffff;
pm8001_ha->ccb_info[i].device = NULL;
@ -437,8 +436,21 @@ static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha,
/* Initialize tags */
pm8001_tag_init(pm8001_ha);
return 0;
err_out_noccb:
kfree(pm8001_ha->devices);
err_out_shost:
scsi_remove_host(pm8001_ha->shost);
err_out_nodev:
for (i = 0; i < pm8001_ha->max_memcnt; i++) {
if (pm8001_ha->memoryMap.region[i].virt_ptr != NULL) {
pci_free_consistent(pm8001_ha->pdev,
(pm8001_ha->memoryMap.region[i].total_len +
pm8001_ha->memoryMap.region[i].alignment),
pm8001_ha->memoryMap.region[i].virt_ptr,
pm8001_ha->memoryMap.region[i].phys_addr);
}
}
err_out:
return 1;
}